WO1993008596A1 - Method for fabrication of semiconductor device - Google Patents
Method for fabrication of semiconductor device Download PDFInfo
- Publication number
- WO1993008596A1 WO1993008596A1 PCT/JP1992/001326 JP9201326W WO9308596A1 WO 1993008596 A1 WO1993008596 A1 WO 1993008596A1 JP 9201326 W JP9201326 W JP 9201326W WO 9308596 A1 WO9308596 A1 WO 9308596A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- layer
- groove
- etching
- oxide film
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/763—Polycrystalline semiconductor regions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
- H01L21/76275—Vertical isolation by bonding techniques
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
- H01L21/76281—Lateral isolation by selective oxidation of silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
- H01L21/76264—SOI together with lateral isolation, e.g. using local oxidation of silicon, or dielectric or polycristalline material refilled trench or air gap isolation regions, e.g. completely isolated semiconductor islands
- H01L21/76286—Lateral isolation by refilling of trenches with polycristalline material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S148/00—Metal treatment
- Y10S148/05—Etch and refill
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S148/00—Metal treatment
- Y10S148/135—Removal of substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/977—Thinning or removal of substrate
Definitions
- the present invention relates to a method for manufacturing a semiconductor device, and particularly to a method suitable for use in forming a deep groove in a silicon substrate to perform isolation between elements.
- Japanese Patent Application Laid-Open No. 61-58952 discloses a method of manufacturing a semiconductor device in which an isolation groove is formed in a bonded SOI (Silicon On Insulator) substrate to perform element isolation.
- a silicon substrate 40 having an insulating film 41 formed on the surface as shown in FIG. 36 (A) and another silicon substrate 42 as shown in FIG. 36 (B) are attached.
- An SOI substrate is obtained by bonding via the insulating film 41, and as shown in FIG. 36 (C), the trench is separated from the main surface of the SOI substrate to the insulating film 41 in the substrate.
- an insulating film 44 is formed on the surface of the S0I substrate including the inner wall surface of the separation groove 43 by thermal oxidation or the like, and a polycrystalline silicon is formed as shown in FIG. 36 (D).
- the insulating film 44 and the polycrystalline silicon 45 protruding from the separation groove 43 on the surface of the substrate are removed, as shown in Fig. 36 (E).
- each element region 46 is electrically separated completely from the substrate 40 or between the elements by an insulator.
- the trench isolation groove for example, as disclosed in page 66 of the document “Ultra-Fast Silicon Bipolar Technology”, a part of the main surface of the silicon substrate is partially filled. It is known to form a thick field oxide film and then form an isolation groove for element isolation. You. This method will be described below.
- a partially thickened field oxide film 32, a silicon nitride film 33, and a silicon oxide film 34 as a mask are formed in this order on the main surface of the silicon substrate 31. Then, in the thin region of the field oxide film, the field oxide film 32, the silicon nitride film 33, and the silicon oxide film 34 are selectively etched to form an opening. The silicon substrate 31 is etched to form a separation groove 35. Then, the silicon oxide film 34 serving as a mask is removed by etching, an insulating film 36 is formed on the inner wall surface of the separation groove 35, and polysilicon 37 is filled in the separation groove 35. I do.
- the polycrystalline silicon 37 when the polycrystalline silicon 37 is filled, the polycrystalline silicon 37 deposited on the silicon nitride film 3.3 is etched back, and after the silicon nitride film 33 is removed by etching.
- the silicon substrate 31 By forming an oxide film 38 on top of the polycrystalline silicon 37 in the separation groove (see FIG. 38), the silicon substrate 31 is electrically completed by the separation groove 35 and the insulating film 36. Is to be separated.
- the oxide film 41 for inter-substrate isolation in the S 0 I substrate has the same etching ratio as the oxide film for the mask, the oxide film as the mask is formed immediately after the formation of the isolation groove. At the same time, if an attempt is made to remove it by etching, the insulating film in the substrate will also be etched.
- the present invention has been made in view of the above circumstances,
- the first object of the present invention is to provide a method of manufacturing a semiconductor device capable of preventing a local decrease in withstand voltage in a separation groove portion by preventing etching of an insulating film for separating a substrate exposed in the separation groove. Aim.
- the formation of the separation groove in the thin portion of the field oxide film prevents the deterioration of the flatness of the substrate surface, which is a concern when the separation groove is formed in the thick portion of the field oxide film. That's why. If a separation groove is formed in a thick portion of the field oxide film, the end surface of the field oxide film is largely exposed by the separation groove, and when the silicon oxide film for a mask is removed by etching, the field oxide film is also formed. Etching results in large constrictions, deteriorating the flatness of the substrate surface. If the flatness of the substrate surface deteriorates, problems such as polysilicon wiring formed on the surface, disconnection of A1 wiring, and short-circuiting will occur. Therefore, if the separation groove is formed in the thin portion of the field oxide film, even if the field oxide film is etched, the deterioration of the flatness of the substrate surface does not cause much problem.
- the present invention does not deteriorate the flatness of the substrate surface even if an isolation groove is formed in a thick portion of the field oxide film, and reduces the size of the semiconductor device to an unnecessary size.
- the second purpose is to prevent the increase in size.
- the trench isolation groove is generally formed by etching a silicon substrate by R.I.E. (Reactive Ion Etching) processing.
- R.I.E. Reactive Ion Etching
- a high frequency is applied to the electrode on which the silicon substrate is mounted to generate an anode drop voltage (bias voltage), and the fluorine-based source gas is bleached.
- the ion-radicals which are active particles generated by the plasma discharge, collide with and react with the silicon substrate to etch them.
- This R.I.E.E process involves a physical etching mechanism and involves a silicon substrate. As a result, crystal defects due to etching damage occur on the inner wall surface of the trench isolation trench and on the surface of the silicon substrate surrounding the trench isolation trench, causing current leakage.
- the cerebral oxidation process is a process of forming an oxide film reaching the inner wall surface of the isolation trench to a depth where a crystal defect exists, and removing the oxide film by etching to remove the crystal defect.
- the C.D.E treatment is a treatment in which a portion having a crystal defect is removed only by a chemical etching mechanism with low aggressiveness by radicals of a source gas activated by plasma discharge. Disclosure of the invention
- an oxide film serving as a mask is formed by filling an isolation trench with polycrystalline silicon and then removing the excess poly oxide that protrudes from the isolation trench on the substrate surface. Etch removal is performed after removal of crystalline silicon.
- a mask layer is deposited on the main surface of the semiconductor substrate, an opening exposing a predetermined portion of the semiconductor substrate main surface is formed in the mask layer, and the mask layer is used as a mask, Forming a groove by etching the semiconductor substrate through the opening; forming an insulating coating on an inner wall surface of the groove; filling a filler into the groove through the opening; Removing the filler material deposited on the surface of the layer to expose the mask layer on the surface, and then removing the mask layer.
- the removal of the mask layer for forming the groove is performed after the filling of the groove with the filler material and the removal of the extra filler material protruding from the groove on the surface, so that the SOI region is removed.
- the present invention is applied when measuring the insulation separation, it is possible to prevent the etching of the insulating film for separating the substrates exposed in the separation groove during the above-mentioned process, and to locally reduce the withstand voltage in the separation groove portion. Can be prevented.
- the present invention provides a method of forming an etching suppressing film in advance under a layer which is a mask when forming a groove, and forming the etching suppressing film and the groove in advance.
- the mask layer is removed in a state of contact with the filler filled therein.
- a first layer (a layer serving as an etching suppressing film) and a second layer (a layer used as a mask for forming a groove) are sequentially deposited on the main surface of the semiconductor substrate, and An opening exposing a predetermined portion is formed in the first and second layers, a groove is formed by etching the semiconductor substrate through the opening using the second layer as a mask, and forming a groove.
- a filler is filled in the groove through the opening to a position where the upper end thereof is equal to or higher than the position of the first layer, and the filler and the first layer are used as etching stoppers in the second groove. It features removing two layers,
- the first and second layers are sequentially formed on the main surface of the substrate, and the height of the filler filling the groove is equal to or higher than the position of the first layer. Control so that '' Therefore, when the second layer, which was used as a mask when forming the groove, is etched away, the filler and the first layer prevent the etching from proceeding to a lower layer side, such as the surface of a semiconductor substrate. There is no step in the groove due to the etching of the field oxide film or the like formed in the step.
- the present invention even if an isolation groove is formed in a thick portion of a field oxide film, the flatness of the substrate surface is not impaired, and an unnecessary size of a semiconductor device which has conventionally been caused in consideration of a mask shift is provided. Enlargement can also be prevented.
- FIGS. 1 to 13 are cross-sectional views for sequentially explaining manufacturing steps of an SOI substrate to which the manufacturing method of the first embodiment of the present invention is applied
- FIGS. 14 to 17 are manufacturing steps of the second embodiment of the present invention.
- FIG. 18 is a cross-sectional view for sequentially explaining the manufacturing process of the S 0 I substrate to which the method is applied
- FIG. 18 is a view showing the result of measuring the defect density after the formation of the separation groove
- FIGS. FIG. 32 is a cross-sectional view for sequentially explaining the manufacturing process of the S 0 I substrate to which the manufacturing method of the embodiment is applied.
- 36 (A) to 36 (E) are cross-sectional views for sequentially explaining the manufacturing process of the conventional 'S0I substrate
- FIGS. 37 and 38 are conventional cross-sectional views.
- FIG. 4 is a cross-sectional view illustrating formation of a wrench groove.
- a P-type first single-crystal silicon substrate 1 After one main surface of a P-type first single-crystal silicon substrate 1 is mirror-polished, thermal oxidation is performed to form an insulating film 2 having a predetermined thickness. Then, a second single-crystal silicon substrate 3 having a mirror-polished main surface is brought into close contact with the insulating film 2 side of the surface of the first silicon substrate 1 in a sufficiently clean atmosphere, and heated. Insulate the insulating film 2 between the silicon substrates 1 and 3 Joins the body. As a result, an SOI substrate formed by bonding the second silicon substrate 3 to the first silicon substrate 1 via the insulating film 2 is produced (see FIG. 1).
- reference numeral 4 denotes an N-type high-concentration impurity (Sb) layer formed by doping from the surface of the second N- type silicon substrate 3 before the junction is formed.
- a pad oxide film 8a is formed on the surface on the side of the second silicon substrate 3 by thermal oxidation, and further a Si 3 N 4 film 9 as a first insulating layer and a first insulating film are formed on the surface.
- the SiO 2 film 10 as a layer is sequentially deposited by the CVD method, and an annealing process at 100 0 is performed to densify the SiO 2 film 10. Subsequently, by depositing a registry (not shown), subjected to R. I.
- FIG. 2 shows a state after the registration is separated.
- the second silicon substrate 3 is selectively etched by R. I. E treatment with HB r based gas as Chingugasu, the insulating film 2 A separation groove 12 is formed (see Fig. 3).
- the deposition thickness of the Si 0 2 film 10 in the previous process is adjusted so that the separation groove 12 reaches the insulating film 2 properly by the etching selectivity between the Si 0 2 film 10 and the silicon substrate 3. Has been determined.
- CDE treatment is performed on the inner wall surface of the separation groove 12.
- D. E process in this uses the RF discharge type plasma etching apparatus, for example, raw material gas: CF 4, 0 2, N 2, frequency: 1 3. 5 6MH z, etching rate: 1 5 0 0 A / mi ii.
- the distance from the plasma to the wafer 100 cm.
- the inner wall surface of the separation groove 12 is etched by about 150 A.
- the inner wall of the C.D.E treated separation groove 12 is annealed. For example, the annealing is performed by heating at 100 ° C. for 30 minutes in an N 2 atmosphere. Performed by
- a sacrificial oxidation treatment may be performed on the inner wall of the annealing-processed separation groove 12.
- this sacrificial oxidation treatment for example, after forming a 500 A sacrificial oxide film by dry oxidation at 100 ° C., the sacrificial oxide film is removed with hydrofluoric acid.
- an insulating film 13 is formed on the inner wall surface of the separation groove 12 by, for example, hot thermal oxidation at 150 ° C., and then a polycrystalline silicon 14 is deposited by an LP-CVD method. I do. At this time, the polycrystalline silicon 14 is buried in the separation groove 12 and also deposited on the SiO 2 film 10 (see FIG. 4).
- the excess polycrystalline silicon 14 deposited on the SiO 2 film 10 is etched back (first time) by dry etching (see FIG. 5). At this time, the etching is stopped so that the upper end of the polycrystalline silicon 14 remaining in the separation groove 12 is higher than the Si 3 N 4 film 9.
- the SiO 2 film 10 is etched away by a wet etching process using a fluorine solution (see FIG. 6).
- the Si 3 N 4 film 9 and the polycrystalline silicon 14 left so that the upper end is located above the Si 3 N 4 film 9 become an etching stopper, and a pad oxide film is formed. 8a and the insulating film 13 formed on the inner wall surface of the separation groove 12 are not etched.
- the portion of the polycrystalline silicon 14 embedded in the separation groove 12 projecting above the Si 3 N 4 film 9 is etched back (second time) by dry etching (FIG. 7). See).
- the thermal oxide film 15 and the surrounding pad oxide film 8a have the same height. Therefore, it is desirable to control the upper end of the polycrystalline silicon 14 to be about 0.3 ⁇ m below the upper end of the pad oxide film 8a.
- the upper portion of the polycrystalline silicon 14 embedded in the isolation trench 12 is selectively thermally oxidized by the Si 3 N 4 film 9 to grow the oxide film 15 (see FIG. 8).
- the Si 3 N 4 film 9 is removed by etching (see FIG. 9). As is clear from FIG. 9, no step is formed in the separation groove 12 and the portion has a flat shape.
- the P-well region 5, the N-well region 6, and the deep N + region 7 are formed on the second silicon substrate 3 side, which is the S0I layer, by a known photolithography and impurity diffusion process (see FIG. 10).
- a field oxide film 8 is formed on the surface on the side of the second silicon substrate 3 by LOCOS (Local Oxidation of Silicon) (see FIG. 11).
- LOCOS Local Oxidation of Silicon
- LO COS method after a Si 3 N 4 film as an oxidation suppressing film is formed again on a predetermined portion of the substrate surface, a portion where the Si 3 N 4 film is not formed is thermally oxidized. forms a thick field oxide film 8 is oxidized by, 1 1, after oxidation with L 0 C 0 S method, is a diagram of is removed by the S i 3 N 4 film H 3 P 0 4 .
- a thin gate oxide film is formed, and polycrystalline silicon wiring (gate electrode) 16 is formed by performing LP-C VD processing, photolithography, and etching processing. Then, a P + diffusion layer 17 and an N + diffusion layer 18 are formed by selective doping (see FIG. 12). During this time, the etching of the field oxide film 8 is about 0.2 m, and the flatness of the separation groove 12 is not impaired. Subsequently, an interlayer insulating film 19 such as PSG or BPSG is deposited, contact holes are formed in necessary portions, and a protective film 21 made of a nitride film by A1 wiring 20 and plasma CVD is formed.
- a Bi-CMOS semiconductor device that combines a CMOS transistor and a bipolar transistor is manufactured (see Fig. 13).
- the silicon 14 prevents the progress of etching to the underlying oxide film 8 a or the oxide film such as the insulating film 13. Therefore, no step is formed in the separation groove 12 and a flat shape is obtained, so that the polysilicon wiring 16 and the A1 wiring 20 are disconnected and short-circuited. The problem does not occur.
- the C.D.E. treatment and the annealing treatment are performed after the formation of the separation groove, so that the inner wall surface of the separation groove and the surface of the silicon substrate around the separation groove are formed when the separation groove is formed. Inevitably generated crystal defects can be eliminated. It is described in detail below.
- the insulating film 13 is formed on the inner wall surface of the separation groove 12, the insulating film 13, the SiO 2 film 8 a and the Si 3 N 4 film 9 are removed by etching.
- the crystal defects were made obvious by the secc 0 etching treatment, and the surface of the second silicon substrate 3 was observed with an optical microscope. Then, the defect density was calculated by counting the number of defects observed in a square having a side of 200 zm.
- Figure 18 shows the results.
- the damage layer generated on the inner wall surface of the groove and the surface of the silicon substrate around the groove during the formation of the groove is sufficiently removed.
- the damaged layer that cannot be completely removed by the CDE process and the damage layer that is newly generated by the CDE process are recovered. This makes it possible to eliminate crystal defects inevitably generated on the inner wall surface of the groove and the surface of the silicon substrate around the groove when forming the groove, thereby preventing inconvenience of current leakage caused by the crystal defect. .
- the conditions of the CDE process are not particularly limited, but the conditions should be such that the damaged layer generated during the formation of the groove can be completely removed by etching, and furthermore, the generation of a new damage layer by the CDE process is suppressed as much as possible. Is preferred.
- This CDE process removes 2 to 5 times the depth of the damage layer generated during groove formation by etching.
- anneal treatment cannot be removed by CDE treatment.
- the conditions are not particularly limited, as long as the damaged layer and the damaged layer newly generated by the C.D.E treatment can be recovered, for example, under an inert N 2 atmosphere.
- the heating can be performed by heating at a temperature of about 110 ° C. for about 10 to 30 minutes.
- the first etching back of the polycrystalline silicon 14 is performed by the dry etching process, but may be performed by a polishing technique.
- the polycrystalline silicon film 9 ' is formed by LP-CVD
- the SiO 2 film 10 is sequentially deposited, and an annealing process is performed on the SiO 2 film 10 in the same manner as in the step shown in FIG. 2 to densify the SiO 2 film 10.
- a resist is deposited, a photolithographic process is performed to form a resist pattern, and Si 0 is performed by R.I.E. process using CF 4 or CHF 3 based gas as an etching gas.
- An opening 11 is formed in the 2 film 10 polycrystalline silicon film 9 ′ and the pad oxide film 8 a, and an Si 3 N 4 film 22 is deposited on the substrate surface (see FIG. 14). Then, anisotropic R. I. Performs E process, leaving the S i 3 4 film 2 2 only on the side wall of the opening 1 1 (see Fig. 1 5). The Si 3 N 4 film 22 is oxidized simultaneously with the polycrystalline silicon film 9 ′ exposed in the opening 11 when the insulating film 13 is formed on the inner wall of the separation groove 12 by thermal oxidation in a later step. There are things that are not done.
- the polycrystalline silicon film 9 is not exposed to the opening 11 by the Si 3 N 4 film 22 and is not oxidized.
- the oxidized portion of the polycrystalline silicon film 9 ′ is simultaneously etched by etching when the Si 02 film 10 is removed by etching in a later step. This causes a step in the separation groove 12.
- the polycrystalline silicon film 9 and the polycrystalline silicon 14 filled in the separation groove 12 act as an etching stopper when the SiO 2 film 10 is removed.
- simultaneous etching of the pad oxide film 8 a under the polycrystalline silicon film 9 ′ and the insulating film 13 is prevented. Further, as described above, since the oxidized portion does not exist in the polycrystalline silicon film 9 ′, etching does not proceed to a lower layer therefrom.
- the polycrystalline silicon film 9 ′ can be removed simultaneously with the second etching back of the polycrystalline silicon film 14.
- a silicon oxide film for a pad having a uniform thickness is formed, a separation groove is formed after depositing a Si 3 N 4 film and a SiO 2 film by CVD, and the inner wall surface of the separation groove is formed.
- formation of absolute ⁇ film to, charge ⁇ polycrystalline silicon into the separation groove, the extra polycrystalline silicon etch-back, S i 02 that the S i 3 4 film and Tayui crystal silicon and etching scan Totsupa Etching removal of the film is performed sequentially, and patterning of the Si 3 N 4 film or removal of the S 13 N 4 film is performed.
- the pad silicon oxide film is subjected to the LOCOS process to form a field oxide film.
- the field oxide film 8 was previously formed by the L0C0S process. It may be formed. An example is shown in the third embodiment.
- the P-well region 5, the N-well region 6, and the deep N + region 7 are formed on the second silicon substrate 3 side, which has been formed as the SOI layer. (See Fig. 20). During this time, the growth and removal of the oxide film on the surface of the second silicon substrate 3 can be performed freely.
- FIG. 3 is a diagram after the Si 3 N 4 film is removed by H 3 P 04 after oxidation by the 0 S method.
- An annealing process is performed at 100 0 to densify the Si 0 2 film 10.
- a resist (not shown) is deposited, and a known photolithography process and an etching gas are used in the thick region of the field oxide film 8.
- Selective etching using resist as a mask on SiO 2 film 10, Si 3 N 4 film 9 and field oxide film 8 by R.I.E treatment using CF 4 and CHF 3 based gas is used.
- an opening 11 reaching the surface of the silicon substrate 3 is formed (see FIG. 22).
- FIG. 22 shows a state after the resist is separated.
- the second silicon substrate 3 is selectively etched by R.I.E. processing using an HBr-based gas as an etching gas with the S ⁇ 02 film 10 as a mask, and the separation reaching the insulating film 2 is performed. Grooves 12 are formed (see Fig. 23). In this case, the deposition of the SiO 2 film 10 in the previous process is performed so that the separation groove 12 reaches the insulating film 2 satisfactorily by the etching selection ratio between the SiO 2 film 10 and the silicon substrate 3. The thickness has been determined.
- CDE treatment is performed on the inner wall surface of the separation groove 12.
- This CDE treatment uses an RF discharge type plasma etching apparatus, for example, raw material gas: CF 4 , O 2 , N 2 , frequency: 13.56 MHz, etching speed: 150 Amin, plasma Distance from wafer to wafer: 100-cm.
- raw material gas CF 4 , O 2 , N 2 , frequency: 13.56 MHz
- etching speed 150 Amin
- plasma Distance from wafer to wafer 100-cm.
- the inner wall surface of the CDE-treated separation groove 12 is annealed.
- This annealing treatment is performed, for example, by heating at 100 ° C. for 30 minutes in an N 2 atmosphere.
- a sacrificial oxidation process may be performed on the inner wall surface of the annealing-processed separation groove 12.
- this sacrificial oxidation process for example, after forming a 500 A sacrificial oxide film by dry oxidation at 100 ° C., the sacrificial oxide film is removed with hydrofluoric acid.
- an insulating film 13 is formed on the inner wall surface of the separation groove 12 by, for example, hot thermal oxidation at 150 ° C., and then a polycrystalline silicon 14 is deposited by an LP-C VD method. At this time, the polycrystalline silicon 14 is buried in the separation groove 12 and is also deposited on the SiO 2 film 10 (see FIG. 24).
- the polycrystalline silicon 14 deposited on the SiO 2 film 10 is etched back (first time) by dry etching (see FIG. 25). The etching is stopped so that the upper end of the polycrystalline silicon 14 remaining in the separation groove 12 is higher than the SiaN 4 film 9.
- the SiO 2 film 10 is removed by etching using a fluorine solution (see FIG. 26).
- the Si 3 N 4 film 9 and the polycrystalline silicon 14 left to have an upper end above the Si 3 N 4 film 9 serve as an etching stopper and are located in the lower layer.
- the insulating film 13 formed on the inner surface of the field oxide film 8 and the separation groove 12 is not etched.
- the portion of the polycrystalline silicon 14 embedded in the separation groove 12 projecting above the Si 3 N 4 film 9 is etched back (second time) by dry etching (see FIG. See 27).
- the thermal oxide film 15 and the surrounding field oxide film 8 are made to have the same height. It is desirable to control the upper end of the crystalline silicon 14 to be about 0.3 m below the upper end of the field oxide film 8.
- the separation groove 12 has a flat shape with no step formed.
- a thin gate oxide film is formed, and polycrystalline silicon wiring (gate electrode) 16 is formed by performing LP-CVD, photolithography and etching. Then, a P + diffusion layer 17 and an N + diffusion layer 18 are formed by selective doving (see FIG. 30). During this time, the etching of the field oxide film 8 is about 0.2 ⁇ m. Yes, the flatness of the separation groove 12 is not impaired.
- the separation groove is formed in the thick range of the field oxide film 8 as described above, and the upper end of the second etched back polycrystalline silicon 14 is formed on the upper end of the second silicon substrate 3.
- the conventional method of forming a separation groove in the thin region of the field oxide film 8 when the polycrystalline silicon 14 is oxidized FIG. 37, FIG. As shown in FIG. 38
- no stress is generated in the second silicon substrate 3 due to the vertical parse beak, and no crystal defects are generated. Therefore, due to crystal defects Current leakage caused by the above can be prevented.
- unlike the conventional method of forming an isolation groove in the thin region of the field oxide film 8 it is not necessary to increase the size of the semiconductor device in anticipation of misalignment of the mask. The size can be reduced.
- the present embodiment it is possible to form the isolation groove in the thick range of the field oxide film without impairing the flatness of the silicon substrate. Therefore, there is no need to anticipate misalignment of the mask and the occurrence of crystal defects on the silicon substrate is suppressed, so that there is no disconnection or short-circuit of the polycrystalline silicon wiring and A1 wiring, and it is unnecessary and large. It is possible to manufacture a semiconductor device that does not become a semiconductor device.
- the isolation trench is formed after the formation of the field oxide film, it is considered that the occurrence of crystal defects around the isolation trench can be suppressed.
- the field oxide film is formed after the isolation groove is formed and insulation is separated, the volume expands when the field oxide film is formed, and the boundary between the silicon substrate and the separation groove is formed. It is concerned that stress concentrates on the part and crystal defects occur, but in this embodiment, there is no concern.
- the C.D.E. processing and the annealing treatment are performed on the inner wall surface of the separation groove 12.
- the damage layer generated on the inner wall surface of the separation groove 12 at the time of forming the separation groove 12 is sufficiently or completely removed by the C.D.E treatment, and the C.D.D.
- the damaged layer that could not be completely removed by the E process and the damaged layer newly generated by the C.D.E process can be recovered, and crystal defects such as the inner wall surface of the separation groove 12 can be eliminated.
- the first etching back of the polycrystalline silicon 14 is performed by dry etching, but may be performed by a polishing technique.
- a polycrystalline silicon film 9 ′ is used instead of the Si 3 N 4 film 9 of the third embodiment.
- a fourth embodiment using the method will be described below.
- polycrystalline silicon films 9 and 10 are sequentially deposited by LP-CVD, and SiO 2 film 10 is sequentially deposited by CVD.
- Annealing at 100 ° C. is performed in the same manner as in the process shown in FIG. 2 to densify the SO 2 film 10.
- a resist is deposited, a photolithography process is performed to form a resist pattern, and the SiO 2 film 1 is formed by R.I.E processing using CF 4 or CHF 3 based gas as an etching gas.
- an opening 11 is formed in the polycrystalline silicon film 9 ′ and the field oxide film 8, and a Si 3 N 4 film 22 is deposited on the substrate surface (see FIG. 32).
- anisotropic RIE processing is performed to leave the Si 3 N 4 film 22 ⁇ only on the side wall of the opening 11 (see FIG. 33).
- This Si 3 N 4 film 22 is used to prevent the polycrystalline silicon film 9 ′ exposed in the opening 11 from being simultaneously oxidized when the insulating film 13 is formed on the inner wall of the separation groove 12 by thermal oxidation in a later step. Is what you do.
- an RIE process using an HBr-based gas as an etching gas is performed, and the second silicon substrate 3 is selectively etched to form a separation groove reaching the insulating film 2.
- Form 1 2 the CDE process and the annealing process are sequentially performed on the inner wall surface of the separation groove 12 as described above.
- the inner wall surface of the separation groove 1 2 is thermally oxidized to form an insulating coating 1 3, then H 3 remove P 0 S i 3 was coated with the wall surface of the opening 1 1 a 4 solution N 4 film 2 2 (See Figure 34).
- the polycrystalline silicon film 9 ′ is not exposed to the opening 11 by the Si 3 N 4 film 22 and is not oxidized.
- the oxidized portion of the polycrystalline silicon film 9 ′ is simultaneously etched by etching when the Si 02 film 10 is removed by etching in a later step. As a result, a step occurs in the separation groove 12.
- polycrystalline silicon 14 is deposited as in the process shown in FIG. After stacking (see FIG. 35), the Bi-CMOS semiconductor device shown in FIG. 31 is manufactured through the same steps as those shown in FIGS. 25 to 31 described above.
- the polycrystalline silicon film 9 ′ and the polycrystalline silicon 14 i filled in the separation groove 12 serve as an etching stopper for removing the SiO 2 film 10. This prevents the polycrystalline silicon film 9, the lower field oxide film 8, and the insulating film 13 from being etched at the same time. Further, as described above, since the oxidized portion does not exist in the polycrystalline silicon film 9 ′, etching does not proceed to a lower layer therefrom.
- the polycrystalline silicon film 9 ′ can be removed simultaneously with the second etching back of the polycrystalline silicon film 14.
- the SiO 2 film is formed by CVD as an oxide film used as a mask at the time of forming the isolation trench.
- a PSG film Phospho S ili cat e Glass
- the insulating film in the groove or the field oxide film around the groove is etched at the same time as the etching used to remove the film used as a mask when forming the groove. Can be prevented. Therefore, problems such as a local decrease in withstand voltage in the groove and a deterioration in flatness of the substrate surface in the groove are not caused, and a semiconductor substrate having a highly reliable trench of the wiring layer can be supplied.
- the present invention is very effective in manufacturing a SOI substrate having a wrench separation.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93908767A EP0562127B1 (en) | 1991-10-14 | 1992-10-12 | Method for fabrication of semiconductor device |
US08/075,514 US5480832A (en) | 1991-10-14 | 1992-10-12 | Method for fabrication of semiconductor device |
DE69231803T DE69231803T2 (de) | 1991-10-14 | 1992-10-12 | Verfahren zur Herstellung einer Halbleiteranordnung |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3/265057 | 1991-10-14 | ||
JP3265057A JP3021850B2 (ja) | 1991-10-14 | 1991-10-14 | 半導体装置の製造方法 |
JP3/265047 | 1991-10-14 | ||
JP26504791A JP2858383B2 (ja) | 1991-10-14 | 1991-10-14 | 半導体装置の製造方法 |
JP3/265046 | 1991-10-14 | ||
JP3265046A JP2812013B2 (ja) | 1991-10-14 | 1991-10-14 | 半導体装置の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993008596A1 true WO1993008596A1 (en) | 1993-04-29 |
Family
ID=27335347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1992/001326 WO1993008596A1 (en) | 1991-10-14 | 1992-10-12 | Method for fabrication of semiconductor device |
Country Status (4)
Country | Link |
---|---|
US (1) | US5480832A (ja) |
EP (1) | EP0562127B1 (ja) |
DE (1) | DE69231803T2 (ja) |
WO (1) | WO1993008596A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0653785A2 (en) * | 1993-11-17 | 1995-05-17 | Nippondenso Co., Ltd. | Di-electric isolated type semiconductor device |
US7704556B2 (en) * | 2002-04-22 | 2010-04-27 | Canon Anelva Corporation | Silicon nitride film forming method |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0612438A1 (en) * | 1991-11-15 | 1994-08-31 | Analog Devices, Inc. | Process for fabricating insulation-filled deep trenches in semiconductor substrates |
KR0162510B1 (ko) * | 1993-07-12 | 1999-02-01 | 가네꼬 히사시 | 반도체 장치 및 그 제조방법 |
JP3033412B2 (ja) * | 1993-11-26 | 2000-04-17 | 株式会社デンソー | 半導体装置の製造方法 |
DE4341171C2 (de) * | 1993-12-02 | 1997-04-17 | Siemens Ag | Verfahren zur Herstellung einer integrierten Schaltungsanordnung |
US5753529A (en) * | 1994-05-05 | 1998-05-19 | Siliconix Incorporated | Surface mount and flip chip technology for total integrated circuit isolation |
JPH07326659A (ja) | 1994-06-02 | 1995-12-12 | Hitachi Ltd | 半導体集積回路装置の製造方法 |
US5691248A (en) * | 1995-07-26 | 1997-11-25 | International Business Machines Corporation | Methods for precise definition of integrated circuit chip edges |
KR0161432B1 (ko) * | 1995-09-13 | 1999-02-01 | 김광호 | 소자분리 영역의 면적을 감소시키기 위한 트랜지스터 제조방법 |
KR970052023A (ko) * | 1995-12-30 | 1997-07-29 | 김주용 | 에스 오 아이 소자 및 그의 제조방법 |
TW309647B (ja) * | 1995-12-30 | 1997-07-01 | Hyundai Electronics Ind | |
US5683945A (en) * | 1996-05-16 | 1997-11-04 | Siemens Aktiengesellschaft | Uniform trench fill recess by means of isotropic etching |
US6291315B1 (en) * | 1996-07-11 | 2001-09-18 | Denso Corporation | Method for etching trench in manufacturing semiconductor devices |
US5811315A (en) * | 1997-03-13 | 1998-09-22 | National Semiconductor Corporation | Method of forming and planarizing deep isolation trenches in a silicon-on-insulator (SOI) structure |
US6013558A (en) * | 1997-08-06 | 2000-01-11 | Vlsi Technology, Inc. | Silicon-enriched shallow trench oxide for reduced recess during LDD spacer etch |
US6333274B2 (en) * | 1998-03-31 | 2001-12-25 | Kabushiki Kaisha Toshiba | Method of manufacturing a semiconductor device including a seamless shallow trench isolation step |
US5880006A (en) * | 1998-05-22 | 1999-03-09 | Vlsi Technology, Inc. | Method for fabrication of a semiconductor device |
KR100318467B1 (ko) * | 1998-06-30 | 2002-02-19 | 박종섭 | 본딩형실리콘이중막웨이퍼제조방법 |
KR20000015663A (ko) | 1998-08-31 | 2000-03-15 | 김영환 | 반도체 소자의 격리막 형성방법 |
US6353246B1 (en) | 1998-11-23 | 2002-03-05 | International Business Machines Corporation | Semiconductor device including dislocation in merged SOI/DRAM chips |
JP3546789B2 (ja) | 1999-12-24 | 2004-07-28 | 株式会社デンソー | 半導体装置の製造方法 |
FR2807568A1 (fr) * | 2000-04-10 | 2001-10-12 | St Microelectronics Sa | Procede de formation de couches enterrees |
US6486043B1 (en) | 2000-08-31 | 2002-11-26 | International Business Machines Corporation | Method of forming dislocation filter in merged SOI and non-SOI chips |
US6797591B1 (en) * | 2000-09-14 | 2004-09-28 | Analog Devices, Inc. | Method for forming a semiconductor device and a semiconductor device formed by the method |
EP1220312A1 (en) * | 2000-12-29 | 2002-07-03 | STMicroelectronics S.r.l. | Integration process on a SOI substrate of a semiconductor device comprising at least a dielectrically isolated well |
GB2372631B (en) * | 2001-02-22 | 2005-08-03 | Mitel Semiconductor Ltd | Semiconductor-on-insulator structure |
JP4852792B2 (ja) * | 2001-03-30 | 2012-01-11 | 株式会社デンソー | 半導体装置の製造方法 |
JP2003017704A (ja) | 2001-06-29 | 2003-01-17 | Denso Corp | 半導体装置 |
US7358164B2 (en) * | 2005-06-16 | 2008-04-15 | International Business Machines Corporation | Crystal imprinting methods for fabricating substrates with thin active silicon layers |
US7488647B1 (en) | 2005-08-11 | 2009-02-10 | National Semiconductor Corporation | System and method for providing a poly cap and a no field oxide area to prevent formation of a vertical bird's beak structure in the manufacture of a semiconductor device |
US7399686B2 (en) * | 2005-09-01 | 2008-07-15 | International Business Machines Corporation | Method and apparatus for making coplanar dielectrically-isolated regions of different semiconductor materials on a substrate |
JP2007317954A (ja) * | 2006-05-26 | 2007-12-06 | Nec Electronics Corp | 半導体装置及びその製造方法 |
US20100117188A1 (en) * | 2007-03-05 | 2010-05-13 | General Electric Company | Method for producing trench isolation in silicon carbide and gallium nitride and articles made thereby |
US7750406B2 (en) * | 2007-04-20 | 2010-07-06 | International Business Machines Corporation | Design structure incorporating a hybrid substrate |
US7651902B2 (en) * | 2007-04-20 | 2010-01-26 | International Business Machines Corporation | Hybrid substrates and methods for forming such hybrid substrates |
US8049297B2 (en) * | 2007-12-11 | 2011-11-01 | Hvvi Semiconductors, Inc. | Semiconductor structure |
US7893485B2 (en) * | 2007-12-13 | 2011-02-22 | International Business Machines Corporation | Vertical SOI trench SONOS cell |
KR101096907B1 (ko) * | 2009-10-05 | 2011-12-22 | 주식회사 하이닉스반도체 | 반도체 소자 및 그 형성방법 |
US10707330B2 (en) * | 2018-02-15 | 2020-07-07 | Globalfoundries Inc. | Semiconductor device with interconnect to source/drain |
CN113314822B (zh) * | 2021-05-31 | 2022-03-22 | 成都海威华芯科技有限公司 | 一种mems滤波器器件背孔的制作工艺和mems滤波器 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59208744A (ja) * | 1983-05-13 | 1984-11-27 | Hitachi Ltd | 半導体装置 |
JPS62101034A (ja) * | 1985-10-28 | 1987-05-11 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 半導体基板表面の突起を除去する方法 |
JPS6333829A (ja) * | 1986-07-03 | 1988-02-13 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 半導体ウエ−ハを修復する方法 |
JPH02148855A (ja) * | 1988-11-30 | 1990-06-07 | Fujitsu Ltd | 半導体装置及びその製造方法 |
JPH03149836A (ja) * | 1989-11-07 | 1991-06-26 | Fuji Electric Co Ltd | 張り合わせ基板を用いた半導体装置の製造方法 |
JPH03149849A (ja) * | 1989-11-07 | 1991-06-26 | Fujitsu Ltd | 半導体装置の製造方法 |
JPH03155650A (ja) * | 1989-08-10 | 1991-07-03 | Oki Electric Ind Co Ltd | 半導体集積回路装置の製造方法 |
JPH04209551A (ja) * | 1990-12-06 | 1992-07-30 | Fujitsu Ltd | 半導体装置の製造方法 |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3966577A (en) * | 1973-08-27 | 1976-06-29 | Trw Inc. | Dielectrically isolated semiconductor devices |
US4307180A (en) * | 1980-08-22 | 1981-12-22 | International Business Machines Corp. | Process of forming recessed dielectric regions in a monocrystalline silicon substrate |
US4389294A (en) * | 1981-06-30 | 1983-06-21 | International Business Machines Corporation | Method for avoiding residue on a vertical walled mesa |
JPS58190040A (ja) * | 1982-04-30 | 1983-11-05 | Nec Corp | 半導体装置の製造方法 |
JPS615544A (ja) * | 1984-06-19 | 1986-01-11 | Toshiba Corp | 半導体装置の製造方法 |
JPS618945A (ja) * | 1984-06-25 | 1986-01-16 | Nec Corp | 半導体集積回路装置 |
JPS6159852A (ja) * | 1984-08-31 | 1986-03-27 | Toshiba Corp | 半導体装置の製造方法 |
US4571819A (en) * | 1984-11-01 | 1986-02-25 | Ncr Corporation | Method for forming trench isolation structures |
JPS61214446A (ja) * | 1985-03-19 | 1986-09-24 | Toshiba Corp | 半導体装置の製造方法 |
JPS62214638A (ja) * | 1986-03-17 | 1987-09-21 | Fujitsu Ltd | 半導体装置の製造方法 |
JPS6333839A (ja) * | 1986-07-28 | 1988-02-13 | Matsushita Electric Ind Co Ltd | 半導体装置の製造方法 |
JPS6386560A (ja) * | 1986-09-30 | 1988-04-16 | Toshiba Corp | 半導体装置の製造方法 |
JP2788269B2 (ja) * | 1988-02-08 | 1998-08-20 | 株式会社東芝 | 半導体装置およびその製造方法 |
JPH01265536A (ja) * | 1988-04-15 | 1989-10-23 | Citizen Watch Co Ltd | 半導体集積回路における素子分離領域の形成方法 |
JPH0267963A (ja) * | 1988-09-01 | 1990-03-07 | Kaken:Kk | 自動微量成分測定方法及びその装置 |
US5028559A (en) * | 1989-03-23 | 1991-07-02 | Motorola Inc. | Fabrication of devices having laterally isolated semiconductor regions |
US4952524A (en) * | 1989-05-05 | 1990-08-28 | At&T Bell Laboratories | Semiconductor device manufacture including trench formation |
EP0398468A3 (en) * | 1989-05-16 | 1991-03-13 | Kabushiki Kaisha Toshiba | Dielectrically isolated substrate and semiconductor device using the same |
JPH0821619B2 (ja) * | 1989-10-13 | 1996-03-04 | 株式会社東芝 | 半導体装置 |
JPH03129854A (ja) * | 1989-10-16 | 1991-06-03 | Toshiba Corp | 半導体装置の製造方法 |
JP2777920B2 (ja) * | 1989-12-20 | 1998-07-23 | 富士通株式会社 | 半導体装置及びその製造方法 |
-
1992
- 1992-10-12 DE DE69231803T patent/DE69231803T2/de not_active Expired - Lifetime
- 1992-10-12 WO PCT/JP1992/001326 patent/WO1993008596A1/ja active IP Right Grant
- 1992-10-12 EP EP93908767A patent/EP0562127B1/en not_active Expired - Lifetime
- 1992-10-12 US US08/075,514 patent/US5480832A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59208744A (ja) * | 1983-05-13 | 1984-11-27 | Hitachi Ltd | 半導体装置 |
JPS62101034A (ja) * | 1985-10-28 | 1987-05-11 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 半導体基板表面の突起を除去する方法 |
JPS6333829A (ja) * | 1986-07-03 | 1988-02-13 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 半導体ウエ−ハを修復する方法 |
JPH02148855A (ja) * | 1988-11-30 | 1990-06-07 | Fujitsu Ltd | 半導体装置及びその製造方法 |
JPH03155650A (ja) * | 1989-08-10 | 1991-07-03 | Oki Electric Ind Co Ltd | 半導体集積回路装置の製造方法 |
JPH03149836A (ja) * | 1989-11-07 | 1991-06-26 | Fuji Electric Co Ltd | 張り合わせ基板を用いた半導体装置の製造方法 |
JPH03149849A (ja) * | 1989-11-07 | 1991-06-26 | Fujitsu Ltd | 半導体装置の製造方法 |
JPH04209551A (ja) * | 1990-12-06 | 1992-07-30 | Fujitsu Ltd | 半導体装置の製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0562127A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0653785A2 (en) * | 1993-11-17 | 1995-05-17 | Nippondenso Co., Ltd. | Di-electric isolated type semiconductor device |
EP0653785B1 (en) * | 1993-11-17 | 2002-06-05 | Denso Corporation | Di-electric isolated type semiconductor device |
US7704556B2 (en) * | 2002-04-22 | 2010-04-27 | Canon Anelva Corporation | Silicon nitride film forming method |
Also Published As
Publication number | Publication date |
---|---|
US5480832A (en) | 1996-01-02 |
DE69231803T2 (de) | 2001-12-06 |
DE69231803D1 (de) | 2001-05-31 |
EP0562127A1 (en) | 1993-09-29 |
EP0562127B1 (en) | 2001-04-25 |
EP0562127A4 (en) | 1994-11-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1993008596A1 (en) | Method for fabrication of semiconductor device | |
JP3033412B2 (ja) | 半導体装置の製造方法 | |
JP4066574B2 (ja) | 半導体装置の製造方法 | |
JP3180599B2 (ja) | 半導体装置およびその製造方法 | |
JPH0580148B2 (ja) | ||
JP2001257259A (ja) | 素子分離構造形成方法 | |
JPH11274290A (ja) | 半導体素子の製造方法 | |
JPH1131743A (ja) | 半導体装置及びその製造方法 | |
JP2002076113A (ja) | 半導体装置およびその製造方法 | |
JPH05109883A (ja) | 半導体装置の製造方法 | |
JP3021850B2 (ja) | 半導体装置の製造方法 | |
US5952707A (en) | Shallow trench isolation with thin nitride as gate dielectric | |
JP2812013B2 (ja) | 半導体装置の製造方法 | |
JP3097338B2 (ja) | コンタクトホールの形成方法 | |
JP2839088B2 (ja) | 半導体装置 | |
JPH0969609A (ja) | 埋込素子分離基板およびその製造方法 | |
KR100895824B1 (ko) | 반도체 소자의 소자분리막 형성방법 | |
WO2002061846A1 (fr) | Dispositif a semiconducteur et son procede de fabrication | |
JP2000101071A (ja) | 半導体装置の製造方法 | |
JP2000031489A (ja) | 半導体装置の製造方法 | |
JP3321527B2 (ja) | 半導体装置の製造方法 | |
JP3189320B2 (ja) | 半導体装置の製造方法 | |
JPH07106413A (ja) | 溝分離半導体装置及びその製造方法 | |
JPH05190658A (ja) | 誘電体分離ウエハの製造方法 | |
JPH1197522A (ja) | 誘電体分離基板およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1993908767 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1993908767 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08075514 Country of ref document: US |
|
WWG | Wipo information: grant in national office |
Ref document number: 1993908767 Country of ref document: EP |