CN100550398C - Semiconductor device and manufacture method thereof - Google Patents

Semiconductor device and manufacture method thereof Download PDF

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Publication number
CN100550398C
CN100550398C CNB2007101384441A CN200710138444A CN100550398C CN 100550398 C CN100550398 C CN 100550398C CN B2007101384441 A CNB2007101384441 A CN B2007101384441A CN 200710138444 A CN200710138444 A CN 200710138444A CN 100550398 C CN100550398 C CN 100550398C
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film
thin
substrate
semiconductor device
electrode
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CN101101916A (en
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石川明
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Semiconductor Energy Laboratory Co Ltd
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Semiconductor Energy Laboratory Co Ltd
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Abstract

A kind of method with flexible Actire matrix display device that realizes is provided.The method of the parasitic capacitance between a kind of wiring that is used to reduce to be formed at different layers is provided in addition.After second substrate being fixed to the thin-film device that is formed on first substrate, removing first substrate, and in thin-film device, form wiring etc. by bonding.Then, remove second substrate, form Actire matrix display device with flexibility.In addition, can form wiring by a side that after removing first substrate, on active layer, does not form gate electrode and reduce parasitic capacitance.

Description

Semiconductor device and manufacture method thereof
The application be that September 14 calendar year 2001, application number are 01130323.9 the applying date, denomination of invention divides an application for the dividing an application of the application for a patent for invention of " semiconductor device and manufacture method thereof " (application number is 200510074018.7, and it day is on May 23rd, 2005 that division is submitted to).
Technical field
The present invention relates to make the method for semiconductor device, specifically, relate to the method for making thin, flexible (having flex capability) semiconductor device.In addition, the present invention relates to reduce the method for parasitic capacitance, described parasitic capacitance is to produce between the wiring that is formed on the different layers by insulation film.Should be understood that, the term semiconductor device represents to utilize the active general device of semiconductive in this manual, specifically, the present invention is applicable to: use the integrated circuit of the element with SOI (insulator-base epitaxial silicon) structure, semiconductor layer forms on insulator in described element; The active matrix liquid crystal display of using thin-film transistor (TFT) to constitute; Active matrix electroluminescence (EL) display device or the like.In this manual, the term film device represents to comprise the thin-film transistor (TFT) of use semiconductive thin film formation and the electronic device of at least one element in a large amount of element such as wiring, conductive layer, resistor and the capacity cell.
Background technology
Use has the integrated circuit that semiconductor layer wherein is formed at the soi structure on the insulator and exists as a kind of semiconductor device.By form semiconductor layer on insulator, it is possible having little parasitic capacitance and having high arithmetic speed.
One type semiconductor device is an active matrix liquid crystal display.A kind of structure is used for active matrix liquid crystal display at large, wherein, at a substrate (TFT forms substrate) last formation thin-film transistor (TFT) and used as the pixel switch element, and go up the formation opposite electrode at a substrate (opposed substrate), two substrates are combined, and inject liquid crystal in the gap between described two substrates.Can put on the voltage of liquid crystal to each single pixel control by the TFT that on transparent substrates, forms, so active matrix liquid crystal display has distinct image, thereby be widely used for business automation equipment, television set or the like such as glass.
In addition, active matrix EL (electroluminescence) display device of known semiconductor device as a type.Active matrix EL display device has such structure, and wherein, the EL material is sandwiched between two electrodes and electric current flows, thereby causes the light emission.Can utilize a plurality of pixel transistors, to the electric current of each single pixel control inflow EL material, so image is clearly.
The integrated level of the semiconductor device of these types has improved, and just in miniaturization.The parasitic capacitance that produces between the wiring of semiconductor device causes propagation of electrical signals time-delay, and this hinders high-speed cruising and propagation of electrical signals accurately.Have two types parasitic capacitance, a kind of is to produce between being formed at the wiring on one deck, and a kind of is to produce being formed between the line of leading on the different layers by insulation film.
If integrated level improves, then the distance between the wiring that forms on one deck becomes less so increases described parasitic capacitance.In order to be reduced in, wiring can be moved on to different layers with the parasitic capacitance between the wiring that forms on one deck.That is, being distributed to the integrated level that connects up on one deck in several layers.Be reduced in the improvement that the parasitic capacitance that produces between the wiring that is formed on the different layers helps the overall integrated level of described semiconductor device by insulation film.
In order to be reduced in the parasitic capacitance that produces between the wiring that is formed on the different layers by insulation film, there is several method, such as making the insulation film thickening, increasing the insulation film that distance between the wiring and use have low-k.But, if make the insulation film thickening, so not only in insulation film, form the duct part and become more difficult in order between wiring, to form the conduction connection, but also there are several problematic situations, in the internal rupture of duct part or can not guarantee enough film thicknesses, so resistance increases such as the conductive layer that forms by sputter.In addition, the insulation film with low-k has the problem (such as the change in size that is caused by etching) that possibility produces problem (such as thermal endurance and gas permeability) relevant with film quality and manufacturing.For example,, under the situation of using the thick acrylic fibers of 1 μ m, bore dia can be increased near 1 μ m, may have infringement total integrated level of semiconductor device though depend on etching condition.
In addition, have such method, the formation order that wherein is used to form the conductive layer of wiring changes.Constituting by top grid (topgate) transistor under the situation with two layers of integrated circuit that is used for forming between the element wiring that conduction connects, use following formation order usually: active layer; First insulation film (grid insulating film); First conductive layer (gate electrode); Second insulation film (insulation film between ground floor); Second conductive layer (first wiring); The 3rd insulation film (insulation film between the second layer); And the 3rd conductive layer (second wiring).
If described structure becomes following structure: first conductive layer (second wiring); First insulation film (bottom insulation film); Active layer; Second insulation film (grid insulating film); Second conductive layer (gate electrode); The 3rd insulation film (insulation film between ground floor); And the 3rd conductive layer (first wiring); Distance between first wiring and second wiring strengthens so, thereby can be reduced in the parasitic capacitance that produces between the wiring.
Distance between first wiring and second wiring strengthens in this case, for example can prevent to relate to the problem that opening is connected with conduction by active layer.But, even under the situation of same second wiring,, must use can bear the film formation temperature that forms active layer subsequently and the hot activation temperature of implanted dopant, thereby the former and the latter's situation can not be used same material for latter event.For example, Al is usually as the wiring material with low-resistivity, but its thermal endurance is low, thereby can not be used for latter event.
Should be pointed out that in this manual electrode is the part of wiring, but use term wiring and electrode for convenience's sake respectively.But the term wiring always is comprised within the word electrode.
Aforesaid those semiconductor device are used among portable set or the like recently, and have the demand that makes portable set become thinner, lighter and more flexible tool flexibility (flex capability).The major part of semiconductor device thickness is the thickness of its substrate, in order to make portable set attenuation and lighter, can make described substrate attenuation.But, if make described substrate attenuation, so, because the cause of the problem of the photoetching treatment aspect that is caused by the warpage of described substrate in the manufacture process is made the difficulty that becomes, and easier in the described substrate of carrying the substrate breakage appears.If can on transparent plastic substrate or the like, make semiconductor device, just can make a kind of light and handy, flexible display device, but because such as the thermal endurance problem of plastic, this situation does not realize also.
In addition, under the situation that reduces parasitic capacitance (described parasitic capacitance is to produce between the wiring that is being formed at by insulation film on the different layers), can realize the accurate propagation of the high-speed cruising and the signal of telecommunication of circuit, therefore can use wiring material with low thermal resistance, such as Al, it once can not use.
Summary of the invention
The present inventor has imagined a kind of method, wherein, makes thin-film device (described substrate has enough thermal endurances and intensity in manufacture process) on the substrate, removes described substrate then.At first, form thin-film device on first substrate, second substrate then bonds.In this state, described thin-film device is present between first substrate and second substrate.Remove first substrate then, described thin-film device is retained on second substrate.Form the duct part, be used to arrive the described thin-film device that is retained on second substrate, and carry out necessary processing, such as forming conductive layer, and similarly remove second substrate so that contact described thin-film device by described duct part.
In addition, in the present invention, by a part of applying adhesive in not forming each zone of thin-film device bond first substrate and second substrate.Perhaps, adhesive is applied to the part in the zone that does not form thin-film device, and uses such as solid other parts of the temporary transient pincers of the adhesive material of viscosity.Can easily remove second substrate by cutting described adhesive segment like this.
If use above-mentioned manufacture method, thin-film device always is retained on the substrate, but latter two substrate all is stripped from, and therefore first substrate and second substrate can be thick, thereby can use the substrate with sufficient intensity.In addition, produce substrate warpage and substrate breakage hardly, make manufacture process carry out easily.
In the substrate carrying, the crackle of substrate back is the reason that reduces the display product quality in such as the display device of active matrix liquid crystal display and active matrix EL display device, and this becomes a problem.If use above-mentioned manufacture method, remove the described substrate that in manufacture process, is used as supporter, so this problem can solve also.
In addition, if use above-mentioned manufacture method, can all form output electrode at the front and back of thin-film device so.If these output electrodes are overlapping, they can be applied to 3D package or the like so.In addition, also have another invention, wherein forming in order: active layer; First insulation film (grid insulating film); First conductive layer (gate electrode); Second insulation film (insulation film between ground floor); After second conductive layer (first wiring), with regard to active layer, on the face relative, form second wiring with first wiring.That is, realize a kind of structure, wherein form: first conductive layer (second wiring); First insulation film (bottom insulation film); Active layer; Second insulation film (grid insulating film); Second conductive layer (gate electrode); The 3rd insulation film (insulation film between ground floor) and the 3rd conductive layer (first wiring).Should be pointed out that in this manual, the term active layer represent by the semiconductive thin film that comprises channel region, source region and drain region form the layer.
Can be reduced in the parasitic capacitance that produces between first wiring and second wiring by said structure, and form described wiring later at the described active layer of formation.Therefore can use material with low heat resistant.
Use two substrates in the present invention in order to realize this structure type.On first substrate, form thin-film device, and second substrate is bonded to the surface that forms thin-film device.The method of use such as mechanical polishing or chemical polishing is removed first substrate, and described thin-film device is supported on second substrate.When first substrate was removed, therefore the back exposure of described thin-film device formed wiring.Therefore can on active layer, form wiring with the bottom surface.Can be formed in the example that forms transistorized example on first substrate, forms transistorized example of bottom gate and formation top gate transistor in a similar fashion.Should be pointed out that in this manual the expression base gate thin-film transistors is represented a kind of like this thin-film transistor, wherein, active layer is formed between gate electrode and the wiring, as shown in figure 27.
In addition, under the condition of manufacture method of the present invention,, only form wiring then, after removing first substrate, can constitute transistor with bottom grating structure in the bottom surface of active layer by on first substrate, forming the top gate transistor.In this case, can be reduced in be formed at the active layer bottom surface first the wiring and grid lead between parasitic capacitance.In addition, can utilize gate electrode with self-adjusting mode implanted dopant, though this is impossible under the situation of traditional bottom grating structure.
According to one aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on first substrate, form thin-film device; Second substrate is bonded on the thin-film device that forms on described first substrate, assigns to form described bonding by one or more binding parts in the tack coat; Remove described first substrate, stay described thin-film device; And cut described second substrate, so that remove one or more parts of described second substrate that is connected to described adhesive segment, and remove described second substrate.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on a surface of first substrate, form the first film device; The film or second thin-film device are bonded to described second substrate; Described film that is bonded in described second substrate or described second thin-film device are bonded to the described described the first film device that is formed on described first substrate; Remove described first substrate, on described second substrate, stay described the first film device; In an insulating barrier, be formed for arriving the duct part that is bonded in the described the first film device on described second substrate; With described second substrate of cutting, in case the adhesive segment of removal between film or described second thin-film device and described second substrate, and only remove described second substrate, stay described film or described second thin-film device.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on a surface of first substrate, form the first film device; The film or second thin-film device are bonded to described second substrate; Described film that is bonded in described second substrate or described second thin-film device that is bonded in described second substrate are bonded to the described described the first film device that is formed on described first substrate; With described second substrate of cutting, in case the adhesive segment of removal between described film or described second thin-film device and described second substrate, and only remove described second substrate, stay described film or described second thin-film device.
According to another aspect of the present invention, a kind of method of making active matrix liquid crystal display device is provided, may further comprise the steps: on a surface of first substrate, form the first film device; The film or second thin-film device are bonded on described second substrate; Introduce liquid crystal being formed at the described the first film device on described first substrate and being bonded to the described film of described second substrate or being bonded between described second thin-film device of described second substrate; With described first substrate of cutting, described the first film device, described second substrate and described film or described second thin-film device, so that remove the part of described first substrate, described the first film device, described second substrate and described film or described second thin-film device, and remove described second substrate, stay described film or described second thin-film device.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on a surface of first substrate, form the first film device; On described thin-film device, form electrode; The described thin-film device that is formed on described first substrate is bonded on described second substrate; Remove described first substrate, on described second substrate, stay described thin-film device; In an insulating barrier, be formed for arriving the duct part that is bonded in the described thin-film device on described second substrate; Cut described second substrate,, and remove described second substrate so that remove the adhesive segment between described thin-film device and described second substrate; Overlaping by a plurality of thin-film devices that repeat all previous steps acquisitions; With make on thin-film device and below the electrodes conduct that forms.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on a surface of first substrate, form the first film device; On described the first film device, form electrode; The film or second thin-film device are bonded on described second substrate; In described film or described second thin-film device, form the duct part; The described film that is bonded in described second substrate or described second thin-film device that is bonded in described second substrate are bonded on the described described the first film device that is formed at described first substrate; Remove described first substrate, on described second substrate, stay described the first film device; In an insulating barrier, be formed for arriving the duct part that is bonded in the described the first film device on described second substrate; Cut described second substrate, so that remove the adhesive segment between described film or described second thin-film device and described second substrate; Only remove described second substrate, stay described film or described second thin-film device; Overlap by a plurality of thin-film devices that repeat all previous steps acquisitions with handle; With make on described thin-film device and below the electrodes conduct that forms.
According to another aspect of the present invention, a kind of semiconductor device is provided, it comprises: a pair of polarization film; Pixel electrode; Thin-film transistor, it comprises: active layer; The grid insulating film that contacts with described active layer; And the gate electrode that contacts with described grid insulating film; Be connected to the wiring of described active layer from described gate electrode side; Opposite electrode; Be formed at pixel electrode between the described a pair of polarization film and the liquid crystal between the described opposite electrode; Sealant; And orientation film.
According to another aspect of the present invention, semiconductor that a kind of utilization forms on the insulating barrier semiconductor device as active layer is provided, wherein, on described active layer and below at least one conductive layer of formation, the material of described conductive layer has the thermal endurance that is equal to or less than 550 ℃.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on first substrate, form thin-film device; Second substrate is bonded on the thin-film device that forms on described first substrate; Remove described first substrate, stay described thin-film device; Form the duct part, be used to arrive the described thin-film device that is bonded on described second substrate; With described second substrate of cutting, so that the adhesive segment of removal between described thin-film device and described second substrate, and remove described second substrate.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on a surface of first substrate, form the first film device; The film or second thin-film device are bonded to described second substrate; The described film or second thin-film device that are bonded to described second substrate are bonded on the described the first film device that forms on described first substrate; Remove described first substrate, stay described the first film device; Be bonded at least one conductive film of formation on the described the first film device of described second substrate; Be formed for arriving the duct part that is bonded in the described the first film device on described second substrate; With described second substrate of cutting, in case the adhesive segment of removal between described film or second thin-film device and described second substrate, and only remove described second substrate, stay described film or described second thin-film device.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on a surface of first substrate, form thin-film device; Polarization film or polarization plates are bonded on second substrate; The polarization film or the polarization plates that are bonded on described second substrate are bonded on the described thin-film device that is formed on described first substrate; Remove described first substrate, stay described thin-film device; Be formed for arriving the duct part that is bonded in the described thin-film device on described second substrate; Cut described second substrate, so that remove the adhesive segment between described polarization film or polarization plates and described second substrate; Only remove described second substrate, stay described polarization film or described polarization plates.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, may further comprise the steps: on first substrate, form semiconductor layer; On described semiconductor layer, form insulation film; Second substrate is bonded on described first substrate, at least described semiconductor layer and described insulation film is inserted between them, utilize at least one binding part of tack coat to assign to form described bonding; Remove first substrate; Cut described second substrate, so that remove at least one part that is connected to described at least one adhesive segment of described second substrate; And remove described second substrate.
According to another aspect of the present invention, a kind of method of making semiconductor device is provided, said method comprising the steps of: on first substrate, form first insulating barrier; On described first insulating barrier, form semiconductor layer; On described semiconductor layer, form second insulating barrier; Second substrate is bonded on described first substrate, is inserted between them to described semiconductor layer of major general and described first and second insulating barriers, utilize at least one binding part of tack coat to assign to form described bonding; Remove described first substrate; In described first insulating barrier, form the duct, so that expose described semiconductor layer; Form the conductive layer that contacts with described semiconductor layer by described duct; Cut described second substrate, so that remove at least one part that is connected to described at least one adhesive segment of described second substrate; And remove described second substrate.
Description of drawings
Figure 1A is the schematic diagram that embodiments of the present invention are shown to 1D;
Fig. 2 A and 2B are the schematic diagrames that embodiments of the present invention are shown;
Fig. 3 A is the schematic diagram that embodiments of the present invention are shown to 3C;
Fig. 4 A and 4B are the schematic diagrames that embodiments of the present invention are shown;
Fig. 5 A and 5B are the schematic diagrames that embodiments of the present invention are shown;
Fig. 6 is the schematic diagram that embodiments of the present invention are shown;
Fig. 7 A is the schematic diagram that the embodiments of the invention example is shown to 7F;
Fig. 8 A is the schematic diagram that the embodiments of the invention example is shown to 8D;
Fig. 9 A is the schematic diagram that the embodiments of the invention example is shown to 9D;
Figure 10 A is the schematic diagram that the embodiments of the invention example is shown to 10C;
Figure 11 A and 11B are the schematic diagrames that the embodiments of the invention example is shown;
Figure 12 is the schematic diagram that the embodiments of the invention example is shown;
Figure 13 is the schematic diagram that the embodiments of the invention example is shown;
Figure 14 A is the schematic diagram that the embodiments of the invention example is shown to 14C;
Figure 15 A and 15B are the schematic diagrames that the embodiments of the invention example is shown;
Figure 16 is the schematic diagram that the embodiments of the invention example is shown;
Figure 17 A is the schematic diagram that the embodiments of the invention example is shown to 17E;
Figure 18 A is the schematic diagram that the embodiments of the invention example is shown to 18D;
Figure 19 A is the schematic diagram that the embodiments of the invention example is shown to 19D;
Figure 20 A is the schematic diagram that the embodiments of the invention example is shown to 20C;
Figure 21 is the schematic diagram that the embodiments of the invention example is shown;
Figure 22 is the schematic diagram that the embodiments of the invention example is shown;
Figure 23 is the schematic diagram that the embodiments of the invention example is shown;
Figure 24 A is that the schematic diagram that utilizes the active matrix EL display device that the present invention makes is shown to 24C;
Figure 25 illustrates the schematic diagram that utilizes the active matrix EL display device that the present invention makes;
Figure 26 illustrates the schematic diagram that utilizes the active matrix EL display device that the present invention makes;
Figure 27 is the schematic diagram that the embodiments of the invention example is shown; With
Figure 28 A is the schematic diagram that the example of electronic device is shown to 28F.
Embodiment
[execution mode 1]
Utilization is explained at Figure 1A to Fig. 3 C and is utilized the present invention to make the method for active matrix liquid crystal display.
At first, thin-film device 102 forms on the substrate 101 at the TFT as first substrate and makes thin-film device (being called thin-film device 102 here).Can add homogenizing film 103, adjust the surface (seeing Figure 1A) of second substrate that is used to bond.
Preparation is as the backing material 104 of second substrate, and adheres to polarization film 107 by adhesive.Should be pointed out that the example that shows bonding here, wherein use two types adhesive respectively.The outside (as described below) of adhesive A 105 adhesive film devices 102 when first substrate and second substrate are combined, and adhesive B106 be a kind of tacky adhesion and in a period of time the solid polarization film of interim pincers be removed up to backing material 104 and remove (seeing Figure 1B).
Certainly, also can the homogenizing film 103 on polarization film and the TFT formation substrate 101 be combined, and it is bonded on the backing material material 104 that has bondd.
In Fig. 1 C, adhesive is coated in passes thin-film device 102 and be formed on the edge that TFT forms the homogenizing film 103 on the substrate, and apply on the edge on surface of the backing material 104 on attached thereon the polarization film 107, thereby two substrates are bonded in together.By removing first substrate, thereby expose the surface (seeing Fig. 1 D) of thin-film device 102) such as the method for back of the body polishing or chemico-mechanical polishing (CMP).In fact, also can prepare at the bottom of thin-film device 102 thin film for example nitride film and when polishing finishes, carry out wet etching as the barrier layer.
Then, form pixel electrode 108 (seeing Fig. 2 A) in the thin-film device on being kept at backing material 104 102.Opposite electrode 110 is attached on the polarization film 112, and utilizes sealant 111 encapsulated liquid crystalses 109 (seeing Fig. 2 B).The polarization film bending should be pointed out that just in case can prepare another backing material material and support polarization film.
In Fig. 3 A, in order to remove the adhesive A 105 of thin-film device 102 outsides, at some position cutting substrates.Remove the zone that scribbles adhesive A 105 by cutting and remove, thereby only stay the zone (seeing Fig. 3 B) that applies by tacky adhesion, and remove backing material 104 and remove (seeing Fig. 3 C) as adhesive B106
Employing is fixed to semiconductor device on the substrate and the manufacture method of removing substrate at last, can make semiconductor device have flexibility, make it thinner, lighter.Therefore should be pointed out that the example that shows relevant active matrix liquid crystal display here, and polarization film is incorporated into and removes substrate surface afterwards.According to application purpose, can freely make up and use the film that is used for surface protection, as film of backing material or the like.
[execution mode 2]
Below the concise and to the point manufacture method of describing of the present invention about the semiconductor device that utilizes thin-film transistor (TFT).Here utilize the sectional view of a thin-film transistor and wiring to describe, certainly, it can be applied to equally and utilize a plurality of transistorized integrated circuits.
On first substrate 1101, form etch stop layer 1102, when first substrate 1101 is removed in removal, will utilize this etch stop layer.Transistor is by constituting with the lower part: bottom insulation film 1103; Comprise for example semi-conductive active layer 1104 of silicon; Grid insulating film 1105; And be formed on gate electrode 1106 on the etch stop layer 1102.Form insulation film 1107 between ground floor, be formed for arriving the duct part of active layer 1104, and form first wiring 1108 by described duct part.Form insulation film 1109 (seeing Fig. 4 A) between the second layer.
Second substrate 1110 is bonded to the surface that is formed with a side of thin-film device above its of first substrate 1101, remove first substrate 1101 and etch stop layer 1102 is removed, and be formed for arriving the duct part (seeing Fig. 4 B) of active layer 1104.Not necessarily need to form etch stop layer 1102, but can be in the transistorized bottom film of preparation example such as nitride film, and at last during carrying out wet etching as the barrier layer.
Form second wiring, the 1111 duct parts that contact with active layer by described duct part, and the insulation film 1112 (seeing Fig. 5 A) that forms.The conduction that forms between first wiring, 1108 and second wiring 1111 by active layer connects in this case, but for alignment accuracy also can only form bigger duct part a part, and can directly connect two wirings.No matter use which kind method, under the situation of structure of the present invention, form the duct part from the top to the bottom, therefore form conduction easily and connect.In addition, after forming active layer, form wiring, can use wiring thus with low thermal resistance.
For relatively, the insulation film and second wiring between insulation film, first wiring, the second layer between the active layer that is used for traditional structure, grid insulating film, gate electrode, ground floor is shown simultaneously in Fig. 6.Should be pointed out that first wiring, 1151 and 1154, second wiring 1155 and 1157 is sectional views of the wiring that is not electrically connected to thin-film transistor shown in each figure of this paper.
If do not use structure of the present invention, so, second wiring 1158 is in the position of representing with label 1156, and second wiring 1156 is near first wiring 1154, thereby their parasitic capacitance becomes big.In addition, second wiring 1157 can form in the position of representing with label 1155, perhaps can form in the position of representing with label 1151, as first wiring.In this case, to first wiring, 1152 pitch smaller.
In other words, under the situation of traditional structure, spacing between first wiring and second wiring is the thickness of insulation film between the second layer, and under the situation of using manufacture method of the present invention, it becomes the thickness sum of insulation film between bottom insulation film and ground floor.The thickness sum of insulation film is certainly greater than the thickness of insulation film between the second layer between bottom insulation film and ground floor.
Therefore, utilize manufacture method of the present invention, can increase the effective thickness of insulation film between each wiring, thereby can be reduced in the parasitic capacitance that produces between the wiring that is formed on the different layers.Though should be pointed out that according to traditional way aspect the conduction connection of passing insulation film problem is being arranged by making the insulation film thickening simply, using manufacture method of the present invention does not have such problem.In addition, the described structure that forms wiring in the each several part below active layer is identical with the situation of traditional structure, but described wiring forms after forming active layer, therefore can use the wiring material with low thermal resistance.Therefore can use out of use low resistance wiring owing to the cause of its low thermal resistance.
[embodiment]
[embodiment 1]
The example that the method for manufacturing semiconductor device of the present invention is applied to active matrix liquid crystal display is shown here.Should be pointed out that the pixel portion that LCD only is shown in each figure, this is because each position, the sealant position of using adhesive respectively will be described, be used to position of cutting substrate or the like.Certainly, the present invention can be used for for example having the LCD of a plurality of pixels, and can be used for the LCD that is combined together to form with drive circuit.
Glass substrate or quartz substrate can be as first substrates 400 among Fig. 7 A.In addition, also can use the substrate that has formed insulation film on its surface, for example at the bottom of silicon substrate, metal substrate or the stainless steel lining.
In order to remove first substrate 400, then form etch stop layer 401.A kind of have enough big optionally material with respect to described first substrate and be used as etch stop layer 401.In this embodiment, quartz substrate is used as first substrate 400, and is forming the silicon nitride film with 10 to 1000nm (usually between 100nm and 500nm) thickness on the etch stop layer 401.
On etch stop layer 401, form first insulation film 402 of the silicon oxide film of 10nm to 1000nm thickness (300nm is to 500nm thickness usually).In addition, also can use silicon oxynitride film.
Then, adopt known film formation method on first insulation film 402, to form the amorphous semiconductor films (being amorphous silicon membrane 403 in this embodiment) of 10nm to 100nm thickness.Should be pointed out that except amorphous silicon membrane, also can use the amorphous compound semiconductive thin film, for example amorphous silicon germanium thin film is as amorphous semiconductor films.
Form the semiconductive thin film (being the silicon thin film 404 of crystallization in this embodiment) that comprises crystalline texture according to being documented in day technology of disclosure special permission communique NO.7-130652 (United States Patent (USP) NO.5,643,826) then.The technology that is documented in the above-mentioned patent is, when making the amorphous silicon membrane crystallization,, utilize catalyst elements (a kind of element of from the group of forming by nickel, cobalt, germanium, tin, lead, palladium, iron and copper, selecting in order to promote crystallization, or multiple element, be typically nickel) method of crystallization.
Specifically, under the state on the surface that catalyst elements is retained in amorphous silicon membrane, heat-treat, thus amorphous silicon membrane is changed into crystal silicon film.The technology that is documented among the embodiment 1 of above-mentioned patent is used in the embodiments of the invention, but also can use the technology among the embodiment 2 that is documented in described patent.Should be pointed out that the term crystal silicon film comprises monocrystalline silicon thin film and polysilicon membrane, and the crystal silicon film that forms in this embodiment is the silicon thin film with grain boundary.
Though rely on the quantity be included in the hydrogen in the amorphous silicon membrane,, preferably handle by carry out dehydrogenation in the heat treatment of 400 to 500 ℃ of following several hrs, thus hydrogen content is reduced to 5 atom % or still less, carry out crystallization then and handle.In addition, also can use the additive method of making described amorphous silicon membrane, for example sputter or evaporation; Yet, preferably reduce the impurity element that is included in the film, for example oxygen and nitrogen fully.
A kind of known technology can be used on the amorphous silicon membrane 403 to form crystal silicon film (polysilicon membrane) 404.In this embodiment, the light (hereinafter referred to as laser) from the laser emission shines amorphous silicon membrane 403 to form crystal silicon film 404 (seeing Fig. 7 C).Pulse emission type or continuous emission type excimer laser can be used as described laser, also can use continuous emission argon laser.Perhaps, also can use second harmonic, triple-frequency harmonics or inferior four harmonic waves of neodymium-doped yttrium-aluminum garnet (Nd:YAG) laser or neodymium-doped yttrium barium oxide (Nd:YVO) laser.In addition, the beam shape of laser can be the shape of wire (comprising long and thin shape) or rectangle.
In addition, also can shine the light of launching from lamp (hereinafter referred to as light) and replace laser (hereinafter referred to as lamp annealing).Can be used as described light from the light of launching such as the lamp of Halogen lamp LED or infrared lamp.
As above the process of heat-treating (annealing) by laser or light makes to be called the optics annealing process.Described optics annealing process is to carry out in time short under high treatment temperature, therefore can for example carry out described heat treatment with high yield effectively under the situation of glass substrate at substrate that use has a low thermal resistance.Certainly, purpose is to anneal, therefore also can use electric furnace as an alternative product carry out electric furnace annealing (thermal annealing).
Be used in this embodiment carry out laser annealing from the linear beam of pulse emission type excimer laser.Described laser annealing condition is as follows: use XeCl gas as encouraging sharp gas; Treatment temperature is set at room temperature; The pulse tranmitting frequency is set at 30Hz; And laser energy density is to 500mJ/cm from 250 2(normally 350 to 400mJ/cm 2).
Except that the complete crystallization of remaining any non-crystalline areas after the thermal crystalline, in the crystal region of crystallization, has the effect that reduces fault etc. in the laser annealing of carrying out under the above-mentioned environment.Therefore, this process also can be called by optics annealing and improves the process of degree of crystallinity of semiconductive thin film and the process that promotes semiconductor thin film crystallization.By making light annealing conditions optimization also might obtain this effect.
The then protective film 405 (seeing Fig. 7 D) that during the interpolation impurity that is formed on the crystal silicon film 404 subsequently, uses.Utilize thickness to form protective film 405 from silicon oxynitride film or the silicon oxide film of 100nm to 200nm (being preferably between 130nm and the 170nm).Form described protective film so that crystal silicon film 404 is not directly exposed under the plasma during adding impurity, so that make precise dose control become possibility.
Subsequently, pass protective film 405 and add impurity element with p type conductance (below be referred to as p type impurity).Usually the belonging to group 13 of periodic table element is generally boron or gallium and is used as p type impurity element.This method (also being referred to as the channel doping process) is a kind of method that is used to control the TFT threshold voltage.Should be pointed out that here and add boron wherein, do not having to utilize diborane (B under the situation of mass separation by ion doping 2H 6) activated plasma.Can certainly use the ion that carries out mass separation to inject.
Form in this way that to comprise concentration be 1 * 10 15To 1 * 10 18Atom/cm 3(typically 5 * 10 16With 5 * 10 17Between) the p type extrinsic region (a) 406 (seeing Fig. 7 D) of p type impurity element.
Next, remove after removing protective film 405, remove unnecessary zone, form island shape semiconductor film (hereinafter being referred to as active layer) 407 (seeing Fig. 7 E) thus except that crystal silicon film.
Form the grid insulating film 408 (seeing Fig. 7 F) that covers active layer 407.Can form and have 10 to 200nm thickness the grid film 408 of (preferably from 50 to 150nm thickness).By using N 2O and SiH 4Plasma CVD as raw material forms the silicon oxynitride film with 80nm thickness.
Though do not illustrate in the drawings,, the folded laminate film of bilayer that has the tungsten nitride (WN) of 50nm thickness and have a tantalum (Ta) of 350nm thickness is used as grating routing 409 (seeing Fig. 8 A).Described grating routing can be formed by the individual layer conductive film equally, but preferably uses two-layer when needs or three layer laminate films.
Should be understood that, selected element from the combination of forming by tantalum (Ta), titanium (Ti), molybdenum (Mo), tungsten (W), chromium (Gr) and silicon (Si), or the alloy firm of the combination of element above-mentioned (typically Mo-W alloy or Mo-Ta alloy) can be used as grating routing.
Then, add n type impurity element (in this embodiment be phosphorus) (see Fig. 8 B) in self-aligning mode at grating routing 409 under as the situation of mask.Adjust the interpolation process so that phosphorus is added to n type extrinsic region (a) 410, therefore with greater than the concentration of 5 to 10 times of the concentration of the boron that adds with the channel doping method (typically from 1 * 10 16To 1 * 10 18Atom/cm 3, more typically 3 * 10 17With 3 * 10 18Atom/cm 3Between) formation n type extrinsic region (a) 410.
Form Etching mask 411, add n type impurity element (being phosphorus in this embodiment), and form the n type impurity range (b) 412 (seeing Fig. 8 C) that contains high concentration phosphorus.Use hydrogen phosphide (PH here 3) ion doping (certainly, also can carry out ion inject), and the concentration of the phosphorus in this zone is set to from 1 * 10 20To 1 * 10 21Atom/cm 3, typically 2 * 10 20With 5 * 10 20Atom/cm 3Between).
In addition, formerly phosphorus that adds in the step and boron have been included in the zone that wherein forms n type impurity range (b) 412, but phosphorus is added with quite high concentration in these n type impurity ranges, does not therefore need to consider by the phosphorus of previous steps interpolation and the influence of boron.
After removing, form the 3rd insulation film 414 (seeing Fig. 8 D) except that Etching mask 411.Can form the laminate film of the insulation film (specifically silicon nitride film), silicon oxide film, silicon oxynitride film or these film combinations that comprise silicon with the thickness of 600nm to 1.5 μ m as described the 3rd insulation film 414.Use with SiH in this embodiment 4, N 2O and NH 3Form the silicon oxynitride film (nitrogen concentration) of 1 μ m thickness with from 25 to 50 atom % as the plasma CVD of unstrpped gas.
Then heat-treat process so that activate n type and the p type impurity element (seeing Fig. 8 D) that adds with concentration separately.This process can be undertaken by stove annealing, laser annealing or rapid thermal annealing (RTA).Here anneal by stove and carry out this activation.Described heat treatment process is to carry out in the nitrogen environment of 300 to 650 ℃ (being preferably between 400 and 550 ℃).Here under 550 ℃, carry out heat treatment in 4 hours.
In this embodiment, at this moment, the catalyst elements of using when crystallization makes described amorphous silicon membrane crystallization moves on the arrow indicated direction and is hunted down in the described n type extrinsic region (b) 412 (this zone is formed in the step shown in Fig. 8 C) that contains high concentration phosphorus.This is a phenomenon that the effect that is absorbed by phosphorus by metallic element causes, the result becomes in the concentration of channel region 413 inner catalyst elements and is less than or equal to 1 * 10 17Atom/cm 3(preferably be less than or equal to 1 * 10 16Atom/cm 3).
On the contrary, described catalyst elements is emanated with high concentration in becoming the zone (the n type extrinsic region (b) 412 that is formed by the step shown in Fig. 8 C) that catalyst elements absorbs the position, and described catalyst elements is there with more than or equal to 5 * 10 18Atom/cm 3(typically from 1 * 10 19To 5 * 10 20Atom/cm 3) concentration exist.
In addition, in the environment that contains the hydrogen between 3% and 100%, under 300 to 450 ℃ temperature, heat-treated, thereby active layer is carried out hydrogenation treatment with 1 to 12 hour.This process is to utilize by one of method of heat activated hydrogen termination dangling bonds in semiconductor layer.Also can utilize other method for hydrogenation to carry out plasma hydrogenation (using hydrogen) by plasma exciatiaon.
Be formed for arriving the source area of TFT and the duct part 415 of drain region (seeing Fig. 9 A) and form source electrode and drain electrode wiring 416 (seeing Fig. 9 B).In addition, though do not illustrate in the drawings, in this embodiment, described wiring is the laminate film of three-decker, wherein, forms Ti film, the aluminium film that contains Ti of 300nm and the Ti thin film sputtering of 150nm of 100nm by injection order ground.
Then with 50 to 500nm thickness (typically 200 and 300nm between) form silicon nitride film, silicon oxide film or silicon oxynitride film as passivation film 417 (seeing Fig. 9 C).In this embodiment, before forming, film uses for example H 2, NH 3Carry out plasma treatment etc. hydrogeneous gas, and after described film forms, heat-treat process.On whole the 3rd insulation film 414, provide the hydrogen that excites by this preliminary treatment.By carrying out heat treatment in this case, improved the film quality of passivation film 417, and the quantity of adding the hydrogen of the 3rd insulation film 414 to is diffused into downside, therefore described active layer can be by hydrogenation effectively.
In addition, the hydrogenation process that after forming passivation film 417, can also add.For example, can in the environment that contains the hydrogen between 3% and 100%, under 300 to 450 ℃ temperature, heat-treat with 1 to 12 hour.Perhaps, also can utilize plasma hydrogenation to obtain similar effects.
Form the 4th insulation film 418 by the about 1 μ m thickness of having of organic resin manufacturing then as homogenizing film (seeing Fig. 9 C).Material such as polyimides, polypropylene, polyamide, polyimide amide and benzocyclobutene (BCB) can be used as described organic resin.Provide the benefit of using organic resin film below: film formation method is simple; Dielectric constant is low, thereby parasitic capacitance is low; And excellent levelness arranged.Should be pointed out that and except those organic resins of stipulating above, also can use for example organic SiO compound.Here use hot polymerization mould assembly polyimides, and form described hot polymerization mould assembly polyimides by after being added to substrate, under 300 ℃, toasting.
Then prepare second substrate 419.When second substrate 419 is attached to first substrate 400, do not forming the regional applying adhesive 420 of thin-film device, and making polarization film 422 can not move (seeing Fig. 9 D) at other zone coating tacky adhesion 421.
Glass substrate, quartz substrate and can be used as second substrate 419 such as the substrate at the bottom of silicon substrate, metal substrate and the stainless steel lining.In addition, the adhesive 420 bonding parts that are cut off after a while (not forming the zone of thin-film device), so adhesive 420 needs not to be transparent.Can select to have stable on heating adhesive.For example, use the bonding polarization film of polyvinyl alcohol (PVA) adhesive usually.Have stable on heating transparent adhesives and be used as tacky adhesion 421 effectively, can provide propylene resin, urethanes and silicon adhesive as tacky adhesion.
In Figure 10 A, be in the same place with the surface adhesion of second substrate 419 that is fixed with polarization film in the surface that will be formed with first substrate 400 of TFT.A kind of transparent heat-resisting adhesive, for example, polyvinyl alcohol (PVA) adhesive can be used as described adhesive.
Under situation about thin-film device being retained on second substrate 419, use such as the method for back grinding or chemico-mechanical polishing (CMP) then and cut away described first substrate 400 (seeing Figure 10 B).In this embodiment, quartz substrate is used as first substrate 400, and therefore nitride film carries out the final sweep-out method of wet etching conduct of using hydrofluoric acid as etch stop layer 401.Should be pointed out that when using wet etching to form pattern the some parts that can stay first substrate 400 is removed, and these parts can be as the pad of LCD.In addition, in this embodiment, then can remove the etch stop layer of making by nitride film 401 by dry etching.
Then in first insulation film 402, form the duct part, and form pixel electrode 423 (seeing Figure 10 B) in order to form pixel electrode.Under the situation that forms transmission-type liquid crystal display, can form described pixel electrode 423 by using transparent electrically-conductive film.Here form transmission type lcd device, and therefore form the indium oxide and the SnO 2 thin film of 110nm thickness by sputter.
In addition, have a kind of when having the duct part 415 of the source that is used for arriving Fig. 9 A TFT and drain region when the part except that active layer is formed for arriving the duct part of etch stop layer 401 source by Fig. 9 B form the method that conduction is connected with leak routing 416.If make in this way, then make the each several part conduction except that active layer, and therefore except making each pixel electrode 423 equates, the aperture that also makes each pixel is than equating.
Then (though not illustrating in the drawings) utilizes polyimide film to form orientation film, carries out friction treatment, thereby makes liquid crystal molecule have certain fixing pre-tilt angle and be directed.Then on polarization film 426, form opposite electrode 425, and use (these do not illustrate in the drawings) such as encapsulant, liners together these adhering components according to known liquid crystal cell constructive method.Then use sealant 427 encapsulated liquid crystalses 424 (seeing Figure 10 C).Should be pointed out that if the incident direction of light is the direction of light 1, then be preferably on the polarization film 422 and form shielded film.In addition, be preferably formed as such film, described film in the incident direction of light be under the situation of light 2 on first insulation film 402 or below become shielded film.Known liquid crystal material can be used for described liquid crystal.Should be pointed out that under the situation of polarization film 426 warpages, can also prepare a kind of and second substrate, 419 similar backing materials.In needs, form chromatic filter and shielded film in can also be in opposed polarization film 426.
Then, as shown in Figure 11 A, cut away by the bonding part of adhesive 420.Only keep by the bonding part of tacky adhesion 421, therefore second substrate 419 is peelled off, thereby finishes thin, lightweight, flexible active matrix liquid crystal display (seeing Figure 11 B).
In addition, the example of LCD shown in Figure 12 wherein utilizes manufacture method of the present invention that drive circuit is combined and is manufactured in together with LCD.Figure 12 is the schematic diagram that shows the state of looking from liquid crystal side: after first substrate forms source signal circuit drive circuit 1302, gate signal line drive circuit 1303 and constitutes the transistor of pixel portion 1301, second substrate that bonds, remove first substrate and introduce liquid crystal (liquid crystal introduces regional 1306).
LCD shown in Figure 12 is made of pixel portion 1301, source signal circuit drive circuit 1302 and gate signal line drive circuit 1303.Pixel portion 1301 is n channel TFT, is made of the cmos circuit as primary element and be formed on peripheral drive circuit.Source signal circuit drive circuit 1302 and gate signal line drive circuit 1303 are by connecting wiring topology 1304 and be connected to FPC (flexible flexible print circuit) 1305 and from the external drive circuit received signal.
Figure 13 illustrates the sectional view that the A-A along the line of Figure 12 sections.The liquid crystal 1403, opposite electrode 1402 and the sealant 1404 that are polarized film 1401 encirclements are under the pixel electrode 1405 that is connected to pixel TFT 1406.In this case, liquid crystal 1403 also is in below the drive TFT 1407, but the time marquis who wants to reduce parasitic capacitance, also liquid crystal 1403 can be arranged in below the pixel electrode 1405.Come the signal of the FPC 1409 of free electric conducting material 1408 bondings to be imported into driver TFT1407.With regard to liquid crystal 1403, form polarization film 1410 by opposite at polarization film 1401, described structure plays transmissive display.
[embodiment 2]
Utilize the example of Brief Description Of Drawings three-dimension packaging in this embodiment, wherein the thin-film device that utilizes the present invention to form is overlaped.
Process up to Fig. 9 C is similar to embodiment 1, therefore the explanation of omitting these parts.Figure 14 A is almost consistent with Fig. 9 A situation, but source and leak routing 416 are extended, thereby forms electrode 900.To should be pointed out that in order illustrating to show two transistors, and to use the label identical with embodiment 1 with the common part of embodiment 1.
Form duct part 901 here, and its reservation is connected (seeing Figure 14 B) so that realize with the conduction of electrode 900.Adhesive 420 and cementitious binder 421 are applied to second substrate 419, but do not need polarization film (seeing Figure 14 C).Polarization film is dispensable, but in order to keep rigidity, can use thin slice, protective film etc.In this case, in thin slice or protective film, form the duct part in advance corresponding to the position of duct part 901.In Figure 15 A, use adhesive 420 and tacky adhesion 421 bondings to be formed with the surface and second substrate 419 of first substrate 400 of thin-film device in the above.
Similar to embodiment 1, remove first substrate 400 and etch stop layer 401.On first insulation film 402, form the duct part, and form electrode 902.Form the passivation film 903 and the pentasyllabic quatrain edge film 904 of coated electrode 902, and form a duct part 905 so that be implemented to the conduction connection of electrode 902.Similar to the passivation film 417 of embodiment 1, can utilize silicon nitride film, silica thing film or silicon oxynitride film with 50 to 500nm thickness (typically 200 and 300nm between) form passivation film 903.Pentasyllabic quatrain edge film 904 is similar to the 4th insulation film 418 of embodiment 1, and it provides homogenizing and as the protectiveness film.Reach the state of Figure 15 B by execution the whole process here.
Adopt then with the identical method of embodiment 1 and remove 419 removals of second substrate.Make a plurality of thin-film devices that form by above-mentioned technical process, and utilize conducting resinl 906 to realize that the conduction between each electrode connects.If the overlapping and bonding with each thin-film device then forms the semiconductor device (seeing Figure 16) of three-dimension packaging subsequently.In recent years, figure for big capacity, small size and lightweight memory, and the application of three-dimensional packaging technology becomes the center that everybody notes.If use the present invention then can easily realize the semiconductor device of three-dimension packaging, and not make treatment step more complicated.Should be pointed out that the thin-film device that combines shown in Figure 16, wherein realize that with the drain region conduction is connected by the source of thin-film transistor, but the direct connection that also can connect up.
[embodiment 3]
The semiconductor device of a kind of use thin-film transistor (TFT) has been described in this embodiment, and described thin-film transistor uses the film that forms on the insulator of its active layer.Should be understood that, although in order to illustrate such as those position relations between wiring and the active layer and between wiring and the insulation film, the sectional view of a film crystal tube portion and wiring is shown in the drawings, and still, the present invention can be applied to have the integrated circuit of a plurality of thin-film transistors equally.
Glass substrate or quartz substrate can be as first substrates 2401 among Figure 17 A.In addition, also can use to have the substrate that is formed on its surperficial insulation film, for example at the bottom of silicon substrate, metal substrate or the stainless steel lining.
Then be formed for removing the etch stop layer 2402 of first substrate 2401.A kind of enough big optionally material that has with respect to first substrate is used as etch stop layer 2402.In this embodiment, quartz substrate is used as first substrate 2401, and form and to have 10 to 1000nm (typically 100 and 500nm between) nitride film of thickness is as etch stop layer 2402.
Form bottom, bottom insulation film 2403 on etch stop layer 2402, it is the silicon oxide film of thickness from 10 to 1000nm (typically 300 to 500nm).In addition, also can use silicon oxynitride film.
Subsequently, on bottom, bottom insulation film 2403, form the amorphous semiconductor films (being amorphous silicon membrane 2404 among this embodiment) (seeing Figure 17 B) of 10 to 100nm thickness by known film formation method.Should be pointed out that except that amorphous silicon membrane, also can use amorphous compound semiconductive thin film such as amorphous silicon germanium as amorphous semiconductor films.
Then form the semiconductive thin film (being crystal silicon film 2405 in this embodiment) that comprises crystalline texture according to being documented in day technology of disclosure special permission communique No.7-130652 (U.S. Patent No. 5,643,826).The technology in the above-mentioned patent of being documented in be a kind of when making the amorphous silicon membrane crystallization in order to promote crystallization, utilize the method for catalyst elements (a kind of element selected or multiple element are typically nickel) crystallization from the group that is made of nickel, cobalt, germanium, tin, lead, palladium, iron and copper.
Specifically, carrying out heat treatment under the following state: catalyst elements is retained on the surface of amorphous silicon membrane, thereby amorphous silicon membrane is changed into crystal silicon film.The technology that is documented among the embodiment 1 of above-mentioned patent is used among this embodiment of the present invention, but also can use the technology among the embodiment 2 that is documented in described patent.Should be pointed out that the term crystal silicon film comprises monocrystalline silicon thin film and polysilicon membrane, and the crystal silicon film that forms in this embodiment is the silicon thin film with grain boundary.
Though depend on the quantity that is included in the hydrogen in the amorphous silicon membrane, preferably handle, thereby hydrogen content is reduced to 5 atom % or still less by carrying out dehydrogenation in the heat treatment of 400 to 500 ℃ several hrs, then carry out crystallization.In addition, also can use the additive method of making amorphous silicon membrane, for example sputter or evaporation, yet, preferably reduce impurity element fully, for example be included in oxygen or nitrogen in the film.
Can be used for known technology on the amorphous silicon membrane 2404 so that form crystal silicon film (monocrystalline silicon thin film or polysilicon membrane) 2405.Shine amorphous silicon membrane 2404 this embodiment to form crystal silicon film 2405 (seeing Figure 17 C) from the light (hereinafter referred to as laser) of laser emission.Pulse emission type or continuous emission type excimer laser can be used as described laser, also can use continuous emission argon laser.Perhaps, also can use second harmonic, triple-frequency harmonics or the four-time harmonic of neodymium doped yttrium aluminium garnet laser or neodymium-doped yttrium barium oxide laser.In addition, the beam shape of laser can be wire (comprising long and thin shape) or rectangular shape.
In addition, also can use the light of launching from lamp (hereinafter referred to as light) to replace laser to shine (hereinafter referred to as lamp annealing).Can use light from the emission of the lamp of for example Halogen lamp LED or infrared lamp as described light.
Above-mentioned process of heat-treating (annealing) by laser or light is called the photo-annealing process.The optics annealing process is to carry out in high treatment temperature and short time, and therefore described heat treatment can for example be carried out with high productivity ratio under the situation of glass substrate effectively at the substrate that uses low thermal resistance.Certainly, target is to anneal, therefore also can use electric furnace as an alternative product carry out electric furnace annealing (thermal annealing).
Be used in this embodiment carry out laser annealing from the light beam of the formation wire of pulse emission type excimer laser.The condition of described laser annealing is as follows: use XeCl gas as excited gas; Treatment temperature is set at room temperature; The pulse tranmitting frequency is set at 30Hz; And laser energy density is to 500mJ/cm from 250 2(normally 350 to 400mJ/cm 2).
The complete crystallization of remaining any non-crystalline areas, the laser annealing of carrying out has the effect of the fault in the zone that reduces crystallization under these conditions after making thermal crystallisation.Therefore, this process also can be called the process that is used for promoting by the process and being used to that photo-annealing improves the degree of crystallinity of semiconductive thin film the crystallization of semiconductive thin film.Also might obtain this effect by optimizing the light annealing conditions.
The then protective film 2406 (seeing Figure 17 D) that during the interpolation impurity that is formed on the crystal silicon film 2405 subsequently, uses.The silicon oxynitride film or the silicon oxide film of (be preferably in 130 and 170nm between) forms protective film 2406 to utilize thickness to be 100 to 200nm.Form described protective film quilt so that crystal silicon film 2405 is not directly exposed under the plasma during adding impurity, make precise dose control become possibility.
Subsequently, pass the impurity element that protective film 2406 adds a kind of p of giving type conductance (below be referred to as p type impurity).Typically can be belonging to group 13 of periodic table element (being generally boron or gallium) as p type impurity element.This method (also being referred to as the channel doping process) is a kind of method that is used to control the TFT threshold voltage.Should be pointed out that here and add boron wherein, do not having to utilize diborane (B under the situation of mass separation by ion doping 2H 6) come activated plasma.Can certainly use the ion that carries out mass separation to inject.
Form in this way that to comprise concentration be 1 * 10 15To 1 * 10 18Atom/cm 3(typically 5 * 10 16With 5 * 10 17Between) the p type impurity range (a) 2407 (seeing Figure 17 D) of p type impurity element (in the present embodiment for boron).
Next, remove, remove the unnecessary zone of crystal silicon film, to form island shape semiconductor film (hereinafter being referred to as active layer) 2408 (seeing Figure 17 E) except that protective film 2406.
Form the grid insulating film 2409 (seeing Figure 18 A) that covers described active layer 2408.Can form and have 10 to 200nm, the grid insulating film 2409 of best 50 to 150nm thickness.By using N 2O and SiH 4Plasma CVD as raw material forms the silicon oxynitride film with 80nm thickness.
Though do not illustrate in the drawings,, the double-deck laminate film of the tantalum (Ta) of tungsten nitride of 50nm thickness (WN) and 350nm thickness is used as gate electrode 2410 (seeing Figure 18 B).Described gate electrode also can be formed by the individual layer conductive film, but preferably uses two-layer when needs or three layer laminate films.
The alloy firm (typically Mo-W alloy or Mo-Ta alloy) that should be pointed out that the combination that can use the element selected or element above-mentioned from the group of being made up of tantalum (Ta), titanium (Ti), molybdenum (Mo), tungsten (W), chromium (Gr) and silicon (Si) is as gate electrode.
Then, utilize grid wiring 2410 to add n type impurity element (being phosphorus in this embodiment) (seeing Figure 18 C) with self-aligned manner as mask.Adjust described interpolation process like this, so as with phosphorus add to than high 5 to the 10 times concentration of the concentration of the boron that adds with the channel doping method (typically from 1 * 10 16To 1 * 10 18Atom/cm 3, more typically 3 * 10 17With 3 * 10 18Atom/cm 3Between) the n type impurity range (a) 2411 that forms.
Form Etching mask 2412, add n type impurity element (phosphorus in this embodiment) quilt, and form the n type impurity range (b) 2413 (seeing Fig. 8 D) that comprises high concentration phosphorus.Use phosphine (PH here 3) ion doping (certainly, also can carry out ion inject), and the concentration of phosphorus is set to from 1 * 10 in this zone 20To 1 * 10 21Atom/cm 3, typically 2 * 10 20With 5 * 10 20Atom/cm 3Between).
In addition, formerly phosphorus that adds in the step and boron have been included in the zone that forms described n type extrinsic region (b) 2413, but here phosphorus is added with quite high concentration, therefore do not need to consider by the phosphorus of previous steps interpolation and the influence of boron.
After removing Etching mask 2412, form insulation film 2414 (seeing Figure 19 A) between ground floor.Can form the insulation film (specifically, the laminate film of silicon nitride film, silicon oxide film, silicon oxynitride film or these film combinations) that comprises silicon with the thickness of 600nm to 1.5 μ m, as insulation film 2414 between described ground floor.In this embodiment, by using SiH 4, N 2O and NH 3Form the silicon oxynitride film (nitride concentration of from 25 to 50 atom %) of 1 μ m thickness as the plasma CVD of unstrpped gas.
Then heat-treat process so that activate n type and the p type impurity element (seeing Figure 19 A) that adds with concentration separately.This process can be finished by electric furnace annealing, laser annealing or rapid thermal annealing (RTA).This activation is finished by electric furnace annealing here.Described heat treatment process is to carry out in the nitrogen environment of 300 to 650C (be preferably in 400 and 550C between).Here, described heat treatment was carried out under 550C 4 hours.
In this embodiment, the catalyst elements of using in the process that makes described amorphous silicon membrane crystallization is at this moment along by moving on the arrow indicated direction, and described contain high concentration phosphorus, by n type impurity range (b) 2413 of the formation of the step shown in Figure 18 D in catalyst elements be hunted down (absorption).This is the phenomenon that a kind of effect that is absorbed by phosphorus by metallic element causes, the result, and becoming in the concentration of channel region 2415 inner catalyst elements is less than or equal to 1 * 10 17Atom/cm 3(preferably be less than or equal to 1 * 10 16Atom/cm 3).
On the contrary, (the n type impurity range (b) 2413 that is formed by the step shown in Figure 18 D) with the high concentration described catalyst elements of emanating in the zone of absorbing catalyst element, thereby in described zone, catalyst elements is with more than or equal to 5 * 10 18Atom/cm 3Concentration (typically 1 * 10 19To 5 * 10 20Atom/cm 3) exist.
In addition, in the environment that contains the hydrogen between 3% and 100%, under 300 to 450 ℃ temperature, heat-treated, thereby active layer is carried out hydrogenation treatment with 1 to 12 hour.This process is one of process of utilizing dangling bonds in the hydrogen terminating semiconductor layer of thermal excitation.The same with other method for hydrogenation, also can carry out plasma hydrogenation (using hydrogen) by plasma exciatiaon.
Be formed for arriving the source area of described TFT and the duct part 2416 of drain region (seeing Figure 19 B) and first wiring, 2417 (seeing Figure 19 C).In addition, though do not illustrate in the drawings, in this embodiment, described first wiring is the laminate film of three-decker, wherein forms Ti film, the aluminium film that contains Ti of 300nm and the Ti film of 150nm of 100nm by the sputter adjoining land.
Next with 50 to 500nm thickness (typically 200 and 300nm between) form silicon nitride film, silicon oxide film or silicon oxynitride film (seeing Figure 19 D) as passivation film 2418.Utilize the gas H for example that contains hydrogen in this embodiment in advance 2, NH 3Deng plasma treatment, and after film forms, heat-treat process.The hydrogen that is excited by this preliminary treatment is provided in the insulation film 2414 between whole ground floor.By heat-treating in this state, improved the film quality of passivation film 2418, and the quantity of adding the hydrogen of insulation film 2414 between ground floor to is diffused into downside, thereby described active layer is by hydrogenation effectively.
In addition, the hydrogenation treatment process that also can after forming passivation film 2418, add.For example, in the environment that contains the hydrogen between 3% and 100%, under 300 to 450 ℃ temperature, heat-treated with 1 to 12 hour.Perhaps, utilize plasma hydrogenation also can obtain similar effects.
Form insulation film 2419 by the about 1 μ m thickness of having of organic resin manufacturing then as homogenizing film (seeing Figure 19 D).Material such as polyimides, polypropylene, polyamide, polyimide amide and benzocyclobutene (BCB) can be used as described organic resin.Provide the benefit of using organic resin film below: film formation method is simple; Dielectric constant is low; And therefore parasitic capacitance is low; And excellent levelness arranged.Should be pointed out that and except those organic resins of stipulating above, also can use for example organic SiO compound.Here use hot polymerization mould assembly polyimides, and form described hot polymerization mould assembly polyimides by after being added to substrate, under 300 ℃, toasting.
Then prepare second substrate 2420, described second substrate 2420 bonds to the surface of first substrate 2401 that is formed with thin-film device on it.Here, can use glass substrate, quartz substrate and such as other substrates at the bottom of silicon substrate, metal substrate and the stainless steel lining as second substrate 2420.Use quartz substrate as second substrate 2420 in this embodiment.Here adhesive and the photo-hardening adhesive such as cpoxies, cyanoacrylate can be used as described adhesive.
Then, thin-film device is retained on second substrate 2420 situation under, use and to cut away first substrate 2401 (seeing Figure 20 B) such as the method for back-grinding or CMP (chemico-mechanical polishing).Quartz substrate is used as first substrate 2401, and nitride film uses as etch stop layer 2402 in this embodiment, and uses hydrofluoric acid to carry out wet etching thus after being ground to suitable thickness.In addition, can remove nitride film etch stop layer 2402 by dry etching subsequently in this embodiment.
Then, form duct part 2421 in the bottom insulation film 2403, and form second wiring 2422 and the insulation film 2423 (seeing Figure 20 C) so that be connected to active layer 2408 (seeing Figure 20 B).Finished the heat treatment of active layer 2408, therefore can use a kind of wiring material to connect up 2422 as second with low thermal resistance.Similar to first wiring 2417, can use aluminium, and, as shown in the embodiment 4, under the situation that thin-film device uses as transmission type lcd device, also can use tin oxide or indium oxide tin (ITO).
Use manufacture method of the present invention, can make the insulation film thickness between first wiring, 2417 and second wiring 2422 thicker, thereby can reduce parasitic capacitance.Form and not have problems aspect the conduction connection passing insulation film, but also can use wiring material with low thermal resistance.This has contribution to the high speed circuit operation of electronic circuit and the accurate propagation of electronic signal.
[embodiment 4]
The manufacture process of the active matrix liquid crystal display that is formed by the semiconductor device of making by embodiment 3 is described in this embodiment.As shown in Figure 21, on the substrate under the state of Figure 20 B, form second wiring 2422.Under the situation of making transmission type lcd device, can use transparent electrically-conductive film as second wiring 2422, and if the manufacturing reflection LCD then can use metallic film.Because the manufacturing transmission type lcd device, so form tin oxide or indium oxide tin (ITO) film of 110nm thickness here by sputter.
Form orientation film 801.Polyimide film is as described orientation film in this embodiment.In addition, on opposed substrate 805, form opposite electrode 804 and orientation film 803.Should be pointed out that when needs also can the time on opposed substrate, form chromatic filter and light shielding film.
After forming orientation film 803, carry out and carry out friction treatment, so that make the liquid crystal molecule orientation by making liquid crystal molecule have certain fixing pre-tilt angle.Constituting technology according to known liquid crystal cell bonds together active matrix substrate (semiconductor device of making) and the opposed substrate that is formed with pixel portion and drive circuit on it by means of encapsulant, liner (the two does not illustrate in the drawings) etc. in embodiment 3.Then liquid crystal 802 is injected between these two substrates, and use sealant (not illustrating in the drawings) that it is sealed fully.Can use known liquid crystal material as described liquid crystal.Thereby finish the active matrix liquid crystal display shown in Figure 21.
Overall structure shown in Figure 22 under the situation that drive circuit and this active matrix liquid crystal display combine.Should be pointed out that Figure 23 is the sectional view of Figure 22 A-A ' along the line incision.Figure 22 is the schematic diagram that shows the state of looking from liquid crystal side: after first substrate forms source signal circuit drive circuit 1902, gate signal line drive circuit 1903 and constitutes the transistor of pixel portion 1901, second substrate bonds, remove first substrate, and introduce liquid crystal (liquid crystal is introduced zone 1906).
Described LCD shown in Figure 22 is made of pixel portion 1901, source signal circuit drive circuit 1902 and gate signal line drive circuit 1903.Pixel portion 1901 is n channel TFT, and be formed on the periphery drive circuit constitute by cmos circuit as primary element.Utilize connecting wiring 1904 that source signal circuit drive circuit 1902 and gate signal line drive circuit 1903 are connected to FPC (flexible print circuit) 1905, and from the external drive circuit received signal.
Liquid crystal 1002 by opposite electrode 1001 and sealant 1003 encirclements is under the pixel electrode 1004 that is connected to pixel TFT 1005.In this case, liquid crystal 1002 also under driver TFT 1006, still, the time marquis who wants to reduce parasitic capacitance, also can only be arranged on liquid crystal 1002 under the pixel electrode 1004.Come the signal of the FPC 1008 of free electric conducting material 1007 bondings to be imported into described driver TFT 1006.
[embodiment 5]
The example that method, semi-conductor device manufacturing method of the present invention is applied to active matrix EL (electroluminescence) display will be described.
Step shown in Figure 10 B of described manufacturing step and embodiment 1 is identical.But polarization film 422 dispensable (Figure 24 A).Transparent conductive film with big service factor (work coefficient) is as described pixel electrode 1200.The chemical mixture of the chemical mixture of indium oxide and tin oxide or indium oxide and zinc oxide can be used as described transparent electrically-conductive film.
Then on pixel electrode 1200, form pentasyllabic quatrain edge film 1202 (in the drawings below the pixel electrodes), and form the duct part in the pentasyllabic quatrain edge film 1202 on pixel electrode 1200.Form EL layer 1201 on the pixel electrode 1200 in the part of duct.Known organic EL Material and inorganic material can be used as described EL layer 1201.In addition, low molecular weight material (monomer) and high molecular weight material (polymer) exist with the form of organic EL Material, can use wherein any.
Can use known application technology as the method that forms EL layer 1201.In addition, the structure of EL layer can be laminated construction or single layer structure, wherein, can be with hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer, electron injecting layer freely makes up.
(being in the drawings below the EL layer) forms the negative electrode of being made up of the conductive film with light shield characteristic (typically have aluminium, copper or silver are as the conductive film of its main component, or the laminate film of these and other conductive film) 1203 on EL layer 1201.In addition, preferably eliminate moisture and the oxide that is present in the contact-making surface between negative electrode 1203 and the EL layer 1201 as much as possible.Therefore must use such as the scheme that forms EL layer 1201 and negative electrode 1203 continuously in vacuo, perhaps in nitrogen or inert gas environment, form EL layer 1201, and then under the environment that is not exposed to oxygen and moisture, form the scheme of negative electrode 1203.In embodiment 5,, realize that film formation process above-mentioned is possible by using a kind of multi-cavity chamber method (combination tool method) film forming device.
Therefore form by pixel electrode 1200 EL element that EL layer 1201 and negative electrode 1203 are formed.Described EL element is filled material 1204 sealings (seeing Figure 24 B).
Can use sheet glass, sheet metal (typically a kind of stainless steel material), potsherd, FRP (fiberglass reinforced plastics) sheet, PVF (polyvinyl fluoride) film, polyester film, polyester film, poly-propionic acid resin film is as cladding material 1205.In addition, also can use thin plate: wherein aluminium foil is clipped in the middle of PVF film or the polyester film with structure like this.
Should be pointed out that at the direction of illumination from the light of EL element be that transparent cladding material is necessary under the situation of described cladding material one side.In this case, use such as sheet glass plastic sheet, polyester film or poly-propionic acid film.
In addition, can use ultraviolet hardening resin or thermosetting resin as packing material 1204.Can use PVC (polyvinyl chloride), acrylic acid, polyimides, epoxy resin, silicones, PVB (polyvinyl butyral resin) and EVA (ethylene vinylacetate).If the inboard at packing material 1204 forms drier (preferably barium monoxide), then can suppress the degeneration of EL element.
In addition, also can in packing material 1204, comprise liner.To make liner itself have hygroscopicity be possible by forming the liner that is made of barium monoxide.In addition, when forming liner, forming a resin film on negative electrode 1203 also is effective as the resilient coating that is used to eliminate from the pressure of liner.
At last, remove second substrate 419 by the cutting substrate identical with embodiment 1.Thereby make thin and light active matrix EL display (Figure 24 C).
[embodiment 6]
The example that utilizes the present invention to make EL (electroluminescence) display will be described in this embodiment.Figure 25 is the schematic diagram of looking from EL layer side, it is presented at the state after the transistor that forms source signal circuit drive circuit 2102, gate signal line drive circuit 2103 on first substrate and constitute pixel portion 2101, second substrate after this bonds, remove first substrate, and form the EL layer.Figure 26 is the sectional view of Figure 11 A-A ' along the line incision.
In Figure 25 and 26, label 2201 expression substrates, label 2101 remarked pixel parts, label 2102 expression source signal circuit drive circuits, 2103 expression gate signal line drive circuit.In these drive circuits each is connected to the outside by the connecting wiring 2104 that is directed to FPC (flexible print circuit).
At this moment form first encapsulant 2106, cladding material 2107, packing material 2208 and second encapsulant 2108 so that surround pixel portion 2101, source signal circuit drive circuit 2102 and gate signal line drive circuit 2103.
Figure 26 is the sectional view corresponding to the A-A ' along the line incision of Figure 25.Formation is included in the driver TFT 2202 (should be pointed out that n channel TFT and p channel TFT are shown) in the source signal circuit drive circuit 2102 on the substrate 2201 here and is included in pixel TFT 2203 (illustrate and be used for the TFT of control flows through the electric current of EL element) in the pixel portion 2101 here.
Form pixel electrode 2204 so that be electrically connected to the source region or the drain region of pixel TFT 2203.Use has the transparent electrically-conductive film of big service factor as pixel electrode 2204.The chemical mixture that can use the chemical mixture of indium oxide and tin oxide or indium oxide and zinc oxide is as described transparent electrically-conductive film.
Then on pixel electrode 2204, form insulation film 2205 (in the drawings below the pixel electrode), and form the duct part in the insulation film on pixel electrode 2,204 2205.Form EL layer 2206 on the pixel electrode 2204 in the part of duct.Known organic EL Material and inorganic material can be used as described EL layer 2206.In addition, low molecular weight material (monomer) and high molecular weight material (polymer) exist with the form of organic EL Material, thereby can use wherein any.
Known application technology can be as the method that forms EL layer 2206.In addition, the structure of EL layer can be laminated construction or single layer structure, wherein with hole injection layer, hole transmission layer, light-emitting layer, electron transfer layer and electron injecting layer independent assortment.
On EL layer 2206, form the negative electrode of forming by the conductive film with light shield characteristic (typically have aluminium, copper or silver conductive film, or the laminate film of these and other conductive film) 2207 as its main component.In addition, preferably remove moisture and the oxygen that is present in interface between negative electrode 2207 and the EL layer 2206 as much as possible.It is possible utilizing multi-cavity chamber method (combination tool method) film forming device to finish above-mentioned film formation process in embodiment 6.
Thereby form by pixel electrode 2204 EL element that EL layer 2206 and negative electrode 2207 are formed.Described EL element is attached to substrate 2201 by first encapsulant 2106 and second encapsulant 2108 cladding material 2107 surrounds, and is filled material 2208 sealings.
Can use sheet glass, sheet metal (being generally stainless steel substrates), potsherd, FRP (fiberglass reinforced plastics) sheet, PVF (polyvinyl fluoride) film, polyester resin film, polyester film, poly-propionic acid resin film is as cladding material 2107.In addition, also can use and have the sheet material that aluminium foil is clipped in the structure between PVF film or the polyester resin film.
Should be pointed out that at the direction of illumination from the light of EL element be that transparent cladding material is necessary under the situation of described cladding material one side.In this case, use such as sheet glass plastic sheet, the transparent material of polyester film or poly-propionic acid film.
In addition, can use ultraviolet hardening resin or thermosetting resin as packing material 2208.Can use PVC (polyvinyl chloride), acrylic acid, polyimides, epoxy resin, silicones, PVB (polyvinyl butyral resin) and EVA (ethylene vinylacetate).If on the inboard of packing material 2208, form drier (preferably ba oxide), then can suppress the degeneration of EL element.
In addition, can also in packing material 2208, comprise liner.To make liner itself have hygroscopicity be possible by formed liner by ba oxide.In addition, when forming liner, forming resin film on negative electrode 2207 also is effective as the resilient coating that is used to eliminate from the pressure of liner.
By electric conducting material 2209 connecting wiring 2104 is electrically connected to FPC2105.Described connecting wiring is transferred to FPC 2105 to the signal that sends to pixel portion 2101, source signal circuit drive circuit 2102 and gate signal line drive circuit 2103, and described wiring is electrically connected to the outside by FPC 2105.
In addition, form second encapsulant 2108, produce a kind of structure that EL element and air are separated fully so that cover the exposed portions of first encapsulant 2106 and the part of FPC 2105.This makes the EL display have the cross-section structure of Figure 26.
[embodiment 7]
Simple declaration in this embodiment utilizes the method for the formation bottom gate thin film transistor of manufacture method of the present invention.The sectional view of a transistor part shown in Figure 27, and manufacture method the method with embodiment 3 is identical basically.Should be understood that, in this manual, the expression base gate thin-film transistors represents to have the thin-film transistor of such shape, and wherein active layer is formed on the layer last (gate electrode and described wiring are not formed on the same side of described active layer) between the gate electrode and second wiring, as shown in Figure 27.
Similar to embodiment 1 among Figure 18 C, in self-aligning mode impurity is added to described active layer 2408 at gate electrode 2410 under as the situation of mask.First wiring 2417 is optional, therefore forms passivation film 2418 and insulation film 2419 on gate electrode 2410, thereby realizes homogenizing.Second substrate 2420 that then bonds is removed first substrate 2401, and forms second wiring 2422 (although first wiring does not exist in this embodiment, still it being expressed as second wiring in order to make comparisons with embodiment 3) and insulation films 2423.
Therefore can on the relative both sides of active layer, form bottom gate transistor with wiring and gate electrode.Different with traditional bottom gate transistor, can add impurity in self aligned mode.
[embodiment 8]
Can be the display part of the Active Matrix Display of the application of the invention manufacturing as electronic equipment.With regard to electronic equipment, provide video camera here, digital camera, projector, projection TV, goggles escope (head-mounted display), navigation system, acoustic reproduction device, notebook personal computer, game machine, portable data assistance (mobile computer for example, cell phone, portable game machine or electronic working book), have the image replaying equipment of tape deck etc.Provided the object lesson of these electronic equipments at Figure 28 A to 28F.
Figure 28 A illustrates and comprises main body 3001, voice output part 3002, phonetic entry part 3003, display part 3004, the cell phone of console switch 3005 and antenna 3006.Active Matrix Display of the present invention can be used in the display part 3004.
Figure 28 B illustrates and comprises main body 3101, display part 3102, sound importation 3103, console switch 3104, the video camera of battery 3105 and image receiving unit 3106.Active Matrix Display of the present invention can be used for display part 3102.
Figure 28 C illustrates and comprises main body 3201, video camera part 3202, image receiving unit 3203, the mobile computer of console switch 3204 and display part 3205.Active Matrix Display of the present invention can be used for display part 3205.
Figure 28 D illustrates and comprises main body 3301, the goggles escope of display part 3302 and arm portion 3303.Active Matrix Display of the present invention can be used for display part 3302.
Figure 28 E illustrates and comprises main body 3401, light source 3402, LCD 3403, polarization beam splitter 3404, the rear projection machine (projection TV) of reflector 3405,3406 and screen 3407.The present invention can be applied to LCD 3403.
Figure 28 F illustrates and comprises main body 3501, light source 3502, LCD 3503, the anterior projector of optical system 3504 and screen 3505.The present invention can be applied to LCD 3503.
As mentioned above, range of application of the present invention is very widely, and can be applied to the electronic equipment of all spectra.
Use the present invention, can make that semiconductor device is relatively thinner, weight is low weight, and semiconductor device can be endowed flexibility.In a word, if substrate is done thinlyyer, the process of then making semiconductor device is complicated, but only just can easily make described semiconductor device by use proper supporting material during utilizing manufacturing of the present invention.Might be applied to the present invention in such semiconductor device, wherein, on insulating barrier, form circuit such as soi structure integrated circuit, active matrix liquid crystal display and active matrix EL display.In addition, utilize the present invention, can make the insulation film between the wiring thicker, thereby can reduce to be formed on the parasitic capacitance that produces between the wiring on the different layers.In addition, solved by conducting electricity the problem that connects and forming the duct part on the insulation film when the problem of the insulation film of formation wiring material thermal resistance during than traditional structure thick.

Claims (20)

1. semiconductor device comprises:
The first film device;
Second thin-film device on described the first film device;
Each described first and second thin-film device comprises respectively:
First dielectric film;
First electrode on described first dielectric film;
Second dielectric film on described first electrode;
First and second thin-film transistors on described second dielectric film, wherein said the first film transistor passes first contact hole and is connected to described first electrode;
The 3rd dielectric film on described first and second thin-film transistors;
Second electrode on described the 3rd dielectric film, wherein said second electrode passes second contact hole and is connected to described second thin-film transistor; With
The 4th dielectric film on described the 3rd dielectric film and second electrode;
Second electrode of wherein said the first film device is electrically connected with first electrode of described second thin-film device.
2. according to the semiconductor device of claim 1, it is characterized in that described semiconductor device is loaded in the electronic installation of selecting: cell phone, video camera, portable computer, ocular lens formula display, rear projector for projecting and pre-projecting type projecting apparatus from following group.
3. according to the semiconductor device of claim 1, it is characterized in that described semiconductor device is an active matrix liquid crystal display.
4. according to the semiconductor device of claim 1, it is characterized in that described semiconductor device is an electroluminescent display.
5. semiconductor device comprises:
The first film device;
Second thin-film device on described the first film device; With
The 3rd thin-film device on described second thin-film device;
Each described first, second comprises respectively with the 3rd thin-film device:
First dielectric film;
First electrode on described first dielectric film;
Second dielectric film on described first electrode;
First and second thin-film transistors on described second dielectric film, wherein said the first film transistor passes first contact hole and is connected to described first electrode;
The 3rd dielectric film on described first and second thin-film transistors;
Second electrode on described the 3rd dielectric film, wherein said second electrode passes second contact hole and is connected to described second thin-film transistor;
The 4th dielectric film on described the 3rd dielectric film and second electrode;
Second electrode of wherein said the first film device is electrically connected with first electrode of described second thin-film device; With
Second electrode of described second thin-film device is electrically connected with first electrode of described the 3rd thin-film device.
6. according to the semiconductor device of claim 5, it is characterized in that described semiconductor device is loaded in the electronic installation of selecting: cell phone, video camera, portable computer, ocular lens formula display, rear projector for projecting and pre-projecting type projecting apparatus from following group.
7. according to the semiconductor device of claim 5, it is characterized in that described semiconductor device is an active matrix liquid crystal display.
8. according to the semiconductor device of claim 5, it is characterized in that described semiconductor device is an electroluminescent display.
9. semiconductor device comprises:
Contain the transistorized the first film device of the first film;
On described the first film device, contain second thin-film device of second thin-film transistor; With
On described second thin-film device, contain the 3rd thin-film device of the 3rd thin-film transistor;
Described second thin-film transistor of wherein said the first film transistor AND gate is electrically connected;
And described second thin-film transistor is electrically connected with described the 3rd thin-film transistor.
10. according to the semiconductor device of claim 9, it is characterized in that described semiconductor device is loaded in the electronic installation of selecting: cell phone, video camera, portable computer, ocular lens formula display, rear projector for projecting and pre-projecting type projecting apparatus from following group.
11., it is characterized in that described semiconductor device is an active matrix liquid crystal display according to the semiconductor device of claim 9.
12., it is characterized in that described semiconductor device is an electroluminescent display according to the semiconductor device of claim 9.
13. a semiconductor device comprises:
Contain the transistorized the first film device of the first film;
On described the first film device, contain second thin-film device of second thin-film transistor; With
On described second thin-film device, contain the 3rd thin-film device of the 3rd thin-film transistor;
Wherein said the first film device is bonded on described second thin-film device by binding agent;
And described second thin-film device is bonded on described the 3rd thin-film device by binding agent.
14., it is characterized in that described semiconductor device is loaded in the electronic installation of selecting: cell phone, video camera, portable computer, ocular lens formula display, rear projector for projecting and pre-projecting type projecting apparatus from following group according to the semiconductor device of claim 13.
15., it is characterized in that described semiconductor device is an active matrix liquid crystal display according to the semiconductor device of claim 13.
16., it is characterized in that described semiconductor device is an electroluminescent display according to the semiconductor device of claim 13.
17. a semiconductor device comprises:
Contain the transistorized the first film device of the first film;
On described the first film device, contain second thin-film device of second thin-film transistor, described second thin-film transistor is electrically connected with described the first film transistor; With
On described second thin-film device, contain the 3rd thin-film device of the 3rd thin-film transistor, described the 3rd thin-film transistor is electrically connected with described second thin-film transistor;
Wherein said the first film device is bonded on described second thin-film device by binding agent;
And described second thin-film device is bonded on described the 3rd thin-film device by binding agent.
18., it is characterized in that described semiconductor device is loaded in the electronic installation of selecting: cell phone, video camera, portable computer, ocular lens formula display, rear projector for projecting and pre-projecting type projecting apparatus from following group according to the semiconductor device of claim 17.
19., it is characterized in that described semiconductor device is an active matrix liquid crystal display according to the semiconductor device of claim 17.
20., it is characterized in that described semiconductor device is an electroluminescent display according to the semiconductor device of claim 17.
CNB2007101384441A 2000-09-14 2001-09-14 Semiconductor device and manufacture method thereof Expired - Fee Related CN100550398C (en)

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