WO1998032170A1 - Composant electronique, dispositif a semiconducteur, procede de fabrication, carte imprimee et equipement electronique - Google Patents
Composant electronique, dispositif a semiconducteur, procede de fabrication, carte imprimee et equipement electronique Download PDFInfo
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- WO1998032170A1 WO1998032170A1 PCT/JP1998/000130 JP9800130W WO9832170A1 WO 1998032170 A1 WO1998032170 A1 WO 1998032170A1 JP 9800130 W JP9800130 W JP 9800130W WO 9832170 A1 WO9832170 A1 WO 9832170A1
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- stress
- semiconductor device
- wiring
- stress relaxation
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/1901—Structure
- H01L2924/1904—Component type
- H01L2924/19043—Component type being a resistor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
Definitions
- the present invention relates to a small-sized electronic component or a semiconductor device having a final package size close to the size of a chip (semiconductor element), a method of manufacturing the same, a circuit board on which these are mounted, and an electronic apparatus having the circuit board.
- CSP chip scale / size package
- An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide an electronic component and a semiconductor device capable of relieving thermal stress so as not to cut a wiring, a method of manufacturing the same, and a circuit mounting the same.
- An object of the present invention is to provide a board and an electronic device having the circuit board. Disclosure of the invention
- the semiconductor device includes a semiconductor element, an external electrode provided for connection to the outside in a region of the semiconductor element, and the semiconductor element connected to the external electrode via a connection portion.
- the semiconductor element and the external electrode are connected by wiring.
- the pitch of the external electrodes can be converted as needed.
- the stress transmitting section can transmit the stress from the external electrode to the stress relieving section to relieve the stress.
- connection part includes not only a case where it exists as a separate member between the wiring and the external electrode but also a case where it is a part of at least one of the wiring and the external electrode.
- connection part includes not only a part directly contacting at least one of the wiring and the external electrode, but also a part not directly contacting any of them. That is, the connection part in the present invention indicates at least a part of a member that electrically connects the wiring and the external electrode.
- the wiring may be provided on the stress relieving unit, and the stress transmitting unit may be provided on the connection unit.
- the wiring is provided on the stress relief portion, the connection portion and the stress transmission portion are provided on the stress relief portion, and the stress from the external electrode is transmitted to the stress relief portion.
- the wiring is provided below the stress relieving portion, the connecting portion is provided to penetrate the stress relieving portion, and the stress transmitting portion is provided on the connecting portion above the stress relieving portion. It may be formed integrally.
- the connecting part since the connecting part penetrates the stress relieving part, the connecting part does not transmit the stress to the stress relieving part in the vertical direction. Instead, the stress transmitting part provided on the stress relieving part transmits the stress to the stress relieving part.
- the stress relaxation portion may be formed to have a thickness from the wiring to the stress transmission portion.
- a groove may be formed in the stress relaxation unit outside the stress transmission unit. The formation of the groove facilitates the deformation of the stress relieving portion and absorbs the stress from the stress transmitting portion.
- a space may be formed in the stress relieving portion between a portion that contacts on the wiring and a portion that contacts below the stress transmitting portion. This makes it easier for the stress relieving part to deform and to absorb the stress from the stress transmitting part.
- the stress relaxation portion having such a space has a thickness from the wiring to the stress transmission portion. It may be formed by etching only from the outside of the stress transmitting portion to the lower portion after forming the stress transmitting portion.
- the present invention may include an auxiliary transmission unit interposed between at least a root outer periphery of the external electrode and the stress relieving unit, and transmitting stress from the external electrode to the stress relieving unit.
- the auxiliary transmission unit may be formed from a material that can be used as the stress relaxation unit.
- the stress relaxation section has a first stress relaxation layer, and a second stress relaxation layer formed on the first stress relaxation layer,
- the wiring is provided between the first and second stress relaxation layers,
- connection portion is provided to penetrate the second stress relaxation layer
- the stress transmission section may be formed integrally with the connection section on the second stress relaxation layer.
- connection portion transmits the vertical stress to the first stress relieving layer. Further, the stress transmitting section transmits the stress to the second stress relaxation layer. Thus, the stress is relieved at two points.
- the stress relaxation section has a first stress relaxation layer, and a second stress relaxation layer formed on the first stress relaxation layer,
- the wiring is provided between the first and second stress relaxation layers,
- connection portion is provided to penetrate the second stress relaxation layer
- a first transmission portion formed integrally with the connection portion between the first and second stress relaxation layers; and a stress transmission portion formed on the connection portion on the second stress relaxation layer. And a second transmission unit formed integrally.
- connection portion transmits the vertical stress to the first stress relieving layer. Further, the stress is transmitted to the first stress relaxation layer also from the first transmission portion of the stress transmission portion. Further, the stress transmitting portion has a second stress transmitting portion, and the second stress transmitting portion has a second stress transmitting portion. The transmitting unit transmits the stress to the second stress relieving layer. Thus, the stress is reduced at three points. -Here, it is preferable that the second transmitting section transmits the stress to the second stress relieving layer in an area larger than that of the first transmitting section.
- the second transmitting section transmits a large stress
- the stress transmitted by the first transmitting section is relatively small.
- the first transmitting portion is close to a direct contact portion between the connecting portion and the wiring, so that the stress transmitted from the first transmitting portion is reduced so that the influence on the contact portion is reduced. be able to.
- the stress transmitting portion is provided in a non-contact state with respect to the connection portion.
- the stress transmitting portion does not transmit the stress to the direct contact portion between the connection portion and the wiring.
- the stress relieving unit may include a separating unit that prevents transmission of stress between a supporting region that supports the stress transmitting unit and a connecting region where the connecting unit is formed.
- the stress transmitted from the stress transmitting portion to the support region of the stress relieving portion is not transmitted to the connection region due to the provision of the separating portion. Therefore, no stress is transmitted from the stress transmitting section to the connecting section via the stress relaxing section.
- the separation portion for example, a groove is used.
- the wiring preferably has a bent portion forming a hollow space between the wiring and the semiconductor element.
- the wiring can be freely deformed at the bent portion, so that the stress can be absorbed most.
- a gel material may be injected into the hollow space to protect the bent portion.
- the stress relaxation portion has a first stress relaxation layer and a second stress relaxation layer formed on the first stress relaxation layer,
- the wiring includes: a first wiring portion formed below the first stress relaxation layer; and a second wiring portion formed between the first and second stress relaxation layers.
- connection portion penetrates the first stress relaxation layer and connects the first and second wiring portions.
- the first and second wiring connection portions are provided at positions shifted in a plane
- the wiring may be drawn out from the external electrode in a direction substantially perpendicular to a direction in which the stress is generated.
- the direction in which the stress is generated and the direction in which the wiring is arranged cross at a substantially right angle. Then, it is possible to prevent the wiring from being pulled and cut in the direction in which the wiring is provided.
- the stress transmission unit may be formed at an outer peripheral position of the connection unit.
- the stress transmission portion transmits the stress at the outer peripheral position of the connection portion between the external electrode and the wiring, so that the stress can be transmitted over a large area.
- the electronic component according to the present invention is provided on the electronic element, an external electrode for connection to the outside, a wiring for electrically connecting the electronic element to the external electrode, and the electronic element.
- a plurality of electronic elements are integrally formed on a substrate.
- the method for manufacturing a semiconductor device includes: a step of forming an electrode on the layer 18; and a step of providing a stress relaxation portion on the layer 8 avoiding the electrode.
- the wafer is cut and individual semiconductor devices are obtained. Therefore, since the stress relaxation layer, the wiring, and the external electrodes for many semiconductor devices can be simultaneously formed, the manufacturing process can be simplified.
- the step of forming the stress relaxation portion is performed after the step of forming the wiring
- a step of forming a groove by etching on the stress relaxation portion outside the stress transmission portion may be included.
- the formation of the groove facilitates the deformation of the stress relieving portion and facilitates the absorption of the stress from the stress transmitting portion.
- the step of forming the stress relaxation portion is performed after the step of forming the wiring
- the method may include a step of etching the stress relieving portion to a position below the stress transmitting portion.
- the stress relief part has a part that contacts on the wiring and a part under the stress transmission part. A space is formed between the contacting part and. Then, the stress relieving portion is easily deformed, and the stress from the stress transmitting portion is easily absorbed.
- a material that can be used as the stress relaxation portion is provided from above the stress relaxation portion to at least the outer periphery of the external electrode, and the auxiliary transmission portion is provided.
- a forming step may be included.
- the auxiliary transmission portion When the auxiliary transmission portion is formed in this way, the stress from the external electrode is transmitted to the stress relieving portion by the auxiliary transmission portion, so that concentration of stress between the external electrode and the stress transmission portion can be prevented.
- a circuit board according to the present invention includes: the semiconductor device described above; and a substrate on which a desired wiring pattern is formed. External electrodes of the semiconductor device are connected to the wiring pattern.
- An electronic device according to the present invention has this circuit board.
- FIG. 1 is a diagram illustrating a semiconductor device according to a first embodiment
- FIG. 2 is a diagram illustrating a semiconductor device according to a second embodiment
- FIG. 3 is a diagram illustrating a semiconductor device according to the third embodiment.
- 4A and 4B are diagrams illustrating a semiconductor device according to a fourth embodiment
- FIG. 5 is a diagram illustrating a semiconductor device according to a fifth embodiment
- FIG. FIG. 7 is a diagram illustrating a semiconductor device according to a sixth embodiment
- FIG. 7 is a diagram illustrating a semiconductor device according to a seventh embodiment
- FIG. 8 is a diagram illustrating a semiconductor device according to an eighth embodiment.
- FIG. 9 is a diagram showing a semiconductor device according to the ninth embodiment, FIG.
- FIGS. 11A and 11B are diagrams showing a semiconductor device according to the tenth embodiment
- FIGS. 11A and 11B are diagrams illustrating a semiconductor device according to the first embodiment
- FIGS. 128 and 128 are diagrams illustrating a semiconductor device according to the first embodiment
- FIG. 13 is a diagram showing the semiconductor device according to the thirteenth embodiment
- FIG. 14 is a diagram showing the semiconductor device according to the fourteenth embodiment
- FIG. 15 is a diagram showing the fifteenth embodiment.
- FIG. 16 is a diagram illustrating a semiconductor device according to an embodiment.
- FIG. 16 is a diagram illustrating a semiconductor device according to a sixteenth embodiment.
- FIGS. 17A to 17E are diagrams illustrating a semiconductor device according to the present invention.
- FIGS. 17A to 17E are diagrams illustrating a semiconductor device according to the present invention.
- FIGS. 17A to 17E are diagrams illustrating a semiconductor device according to the present invention.
- FIGS. 17A to 17E are diagram
- FIGS. 18A to 18C are diagrams showing a manufacturing process of a semiconductor device according to the present invention
- FIG. 19 is a diagram showing a CSP type semiconductor device.
- FIG. 20 is a diagram illustrating a circuit board on which a semiconductor device manufactured by applying the method according to the present invention is mounted
- FIG. 21 is a diagram illustrating a circuit board manufactured by applying the method according to the present invention.
- FIG. 9 is a diagram illustrating an electronic apparatus including a circuit board on which a semiconductor device is mounted.
- each drawing is partially enlarged for easy understanding. Particularly, in the following description, the description is made on the assumption that one semiconductor device is finally formed into individual pieces. Therefore, there are some differences in terms and shapes used from actual ones.
- the portion described as a semiconductor chip does not only refer to an individual piece (that is, a chip shape) as it means, but may also refer to a wafer shape that is not an individual piece. .
- the semiconductor chip referred to here only needs to have a predetermined circuit that can be used even if it is separated on a base substrate (for example, made of silicon). Whether it is separated into individual pieces or integrated with it. It is not necessary to specifically limit.
- a base substrate for example, made of silicon
- FIG. 1 is a sectional view showing the semiconductor device according to the first embodiment.
- the semiconductor device 10 shown in the figure has a stress relaxation layer 16 and a wiring 18 formed thereon. Specifically, a stress relaxation layer 16 is formed on the semiconductor chip 12 so as to avoid the electrode 14, and a wiring 18 is formed from the electrode 14 to the stress relaxation layer 16.
- the stress relaxation layer 16 is made of a photosensitive polyimide resin, and when the semiconductor device 10 is mounted on a substrate (not shown), the difference in thermal expansion coefficient between the semiconductor chip 12 and the substrate is obtained. This is to reduce the stress caused by the above.
- polyimide resin has an insulating property to the wiring 18 and can protect the surface. Also has heat resistance when melting.
- the polyimide resins those having a low Young's modulus (for example, an off-line polyimide resin or BCB manufactured by Dow Chemical Co., Ltd.) are preferably used. Particularly, when the Young's modulus is about 20 kg / mm 2 or less, It is preferable that there is.
- the thickness is preferably about 1 to 100 / m.
- a thickness of about 10 ⁇ m is sufficient.
- a material having a low Young's modulus and capable of acting as a stress relieving material such as a silicone-modified polyimide resin, an epoxy resin, or a silicon-modified epoxy resin, can be used.
- a non-photosensitive resin When a non-photosensitive resin is used, a predetermined pattern may be formed in a photo etching step in combination with another resist.
- the wiring 18 is made of chrome (Cr).
- Cr chrome
- Cr chromium
- Titanium is also preferable from the viewpoint of adhesion to polyimide. In the case where titanium is used for the wiring 18, two or more layers may be formed by combining titanium and the other metals. wiring
- the film 18 is formed by a method such as sputtering, plating, or a combination thereof, and forms a predetermined pattern by photoetching.
- the material of the stress relaxation layer and the material of the wiring described in the examples here can be appropriately selected from those of the first embodiment in any form after the second embodiment.
- a solder ball (external electrode) 20 is provided on the wiring 18. Specifically, a stress transmission part 22 is provided on the wiring 18, a pedestal 24 is provided on the stress transmission part 22, and a solder ball 20 is provided on the pedestal 24. Have been.
- the stress transmitting part 22 and the pedestal 24 are formed by copper plating, and the solder ball 20 It consists of a ball-shaped solder more than a ball.
- the stress transmitting portion 22 and the pedestal 24 are preferably formed of the same metal as the material used for the wiring 18.
- the characteristic of this embodiment is that, as shown in FIG. 1, the relationship between the width d of the base end 24 a of the pedestal 24 and the stress transmitting portion 22 and the width D of the stress transmitting portion 22 is shown. Is that d ⁇ D.
- the base end 24 a of the pedestal 24 is a part (connecting portion) of a member for electrically connecting the solder ball (external electrode) 20 and the wiring 18, and has an outer periphery thereof.
- the stress transmission part 22 extends integrally to the position. By forming such a stress transmitting portion 22, the solder ball 20 is supported on the stress relieving layer 16 with a relatively large width D.
- Such a wide stress transmitting portion 22 is effective in transmitting stress. That is, due to the difference in the thermal expansion coefficient between the mounting substrate and the semiconductor chip 12, for example, when heat is applied to the substrate and the semiconductor device mounted on the substrate, a stress that bends the semiconductor chip 12 is generated. . This stress acts as a force to fall around the center of the solder ball 20 as an axis. According to the present embodiment, the solder ball 20 is supported by the stress relieving layer 16 by the stress transmitting portion 22 having the relatively large width D. Therefore, the stress that tends to knock down the solder balls 20 is transmitted to the stress relaxation layer 16 over a large area, and the stress relaxation layer 16 can absorb a large stress.
- the effect of the stress transmission is the same as that shown in the first embodiment in the second and subsequent embodiments.
- a wiring protection layer such as a solder resist as the outermost layer in order to prevent corrosion of the wiring.
- FIG. 2 is a cross-sectional view illustrating a semiconductor device according to the second embodiment.
- a wiring 38 is formed below a stress relaxation layer 36. More specifically, a wiring 38 is formed from the electrode 34 on the semiconductor chip 32 via an oxide film (not shown) as an insulating layer, and a stress relaxation layer 36 is formed thereon. I have.
- the wiring 38 is made of chrome (Cr).
- a hole 36a is formed in the stress relaxation layer 36 by photolithography. In the region of the hole 36a, the wiring 38 is not covered with the stress relaxation layer 36. In other words, the hole 36a is formed such that the wiring 38 is located immediately below the hole 36a.
- a chromium (Cr) layer 42 and a copper (Cu) layer 44 are formed by sputtering over the wiring 38, the inner peripheral surface forming the hole 36a, and the opening end. That is, the chromium (Cr) layer 42 and the copper (Cu) layer 44 are formed so as to penetrate the stress relaxation layer 36. In addition, the chromium (Cr) layer 42 and the copper (Cu) layer 44 have a relatively wide width at the opening end.
- a pedestal 46 made of copper (Cu) is formed on the copper (Cu) layer 44, and a solder ball 40 is formed on the pedestal 46.
- the solder ball 40 is electrically connected to the electrode 34 via the ground wiring 38, the copper layer 44, the chrome layer 42, and the pedestal 46.
- the stress transmitting portion 48 formed from at least a part of the chrome ( ⁇ ) layer 42, the copper (Cu) layer 44 and the pedestal 46.
- the stress from the solder ball 40 is transmitted to the stress relaxation layer 36.
- connection part 38 a is a part of the chrome (Cr) layer 42, and is a part of a member for electrically connecting the solder ball (external electrode) 40 and the wiring 38. It is.
- the stress transmitting portion 48 is provided including the flange portion 48a, that is, the projecting portion. Therefore, the stress transmitting portion 48 can transmit the stress acting to tilt around the center of the solder ball 40 to the stress relieving layer 36 over a wide area. The larger the area of the stress transmitting portion 48 is, the more effective it is.
- the stress transmitting portion 48 is arranged at a position different from the height of the connecting portion 38 a for the wiring 38, and the connecting portion 38 a and the wiring 38 are hard. Since it is arranged on the oxide film, the generated stress is absorbed by the stress relaxation layer 36. Therefore, it is difficult for the stress to be transmitted to the connecting portion 38a, and it is difficult for the stress to be transmitted to the wiring 38, so that cracks can be prevented. (Third embodiment)
- FIG. 3 is a sectional view showing a semiconductor device according to a third embodiment.
- the semiconductor device 31 shown in the figure has a structure in which an auxiliary transmission layer 33 is formed on the stress relaxation layer 36 of the semiconductor device 30 shown in FIG.
- the connection portion 38a is a part of the chrome (Cr) layer 42, and is a member of a member for electrically connecting the solder ball (external electrode) 40 and the wiring 38. Department.
- the auxiliary transmission layer 33 is formed in contact with at least the root periphery of the solder ball 40. Therefore, the stress is transmitted from the solder balls 40 to the stress relaxation layer 36 via the auxiliary transmission layer 33. This disperses the stress and concentrates the stress between the solder ball 40 and the stress transmitting portion 48, particularly, at the joint between the pedestal 46 and the copper (Cu) layer 44. Can be avoided.
- the stress transmitting portion 48 is formed of at least a part of the chromium (Cr) layer 42, the copper (Cu) layer 44, and the pedestal 46.
- the auxiliary transmission layer 33 is made of a resin that can be used as the stress relieving layer 36, and its thickness depends on the flexibility (Young's modulus) of the resin itself and the magnitude of the stress required for transmission. I can decide. That is, when a soft resin is used, a large stress can be transmitted by forming the auxiliary transmission layer 33 thick. When a relatively hard resin is used, forming the auxiliary transmission layer 33 thin can prevent the transmitted stress from becoming too large.
- the auxiliary transmission layer 33 can be formed by spin coating after the formation of the solder ball 40.
- a resin layer is formed on the stress relaxing layer 36, and the resin layer is formed on the stress transmitting portions 48.
- a solder ball 40 may be provided by forming an opening in the hole. In this case, the opening can be formed by applying photolithography technology or etching (dry or wet) technology.
- FIG. 4A and 4B are cross-sectional views illustrating a semiconductor device according to the fourth embodiment.
- FIG. 4A is a cross-sectional view taken along the line IV-IV of FIG. 4B.
- the semiconductor device 37 shown in these figures is the same as the semiconductor device 30 shown in FIG. 2 except that a groove 35 is formed in the stress relaxation layer 36.
- FIG. 2 and FIG. 4A are different in the cross-sectional position.
- the connection portion 38a is a part of a member that electrically connects the solder ball (external electrode) 40 and the wiring 38 (see FIG. 2).
- the groove 35 is formed in a portion of the stress relieving layer 36 located outside the stress transmitting portion 48.
- the stress relieving layer 36 is more easily deformed on the stress transmitting portion 48 side than the groove 35. This makes it easier for the stress relieving layer 36 to absorb the stress.
- the groove 35 when the material constituting the stress absorbing layer 36 has low flexibility (high Young's modulus), it is possible to use a material having high flexibility (low Young's modulus). Equivalent stress relaxation force can be obtained. If the above processing is further performed using a material having high flexibility, stress can be further alleviated. The same applies to fifth and sixth embodiments to be described later.
- the groove 35 is formed in the direction in which stress is applied from the stress transmitting portion 48 to the stress relieving layer 36 (the direction indicated by the arrow in FIG. 4B). Therefore, the stress relaxation force is increased in the direction in which the stress is applied.
- the position at which the groove 35 is formed is not limited to the position shown in FIGS. 4A and 4B. C
- the groove 35 may be moved in the direction in which stress is applied from the stress transmitting portion 48 to the stress relieving layer 36 ( It may be formed on the side in a direction different from the direction indicated by the arrow in FIG. 4B) or may be formed so as to surround the stress transmitting portion 48.
- FIG. 5 is a cross-sectional view illustrating a semiconductor device according to the fifth embodiment.
- the semiconductor device 39 shown in the figure is obtained by etching the stress relaxation layer 36 of the semiconductor device 30 shown in FIG. That is, the power relaxation layer 41 of the semiconductor device 39 is formed thinner than the stress relaxation layer 36 shown in FIG.
- a space 43 is formed between a portion of the stress transmitting portion 48 that contacts below the flange portion 48a and a portion that contacts on the wiring 38. That is, the stress relaxation layer 41 is formed so as to be constricted below the brim portion 48 a of the stress transmission portion 48.
- the constricted shape may be a round shape or a tapered shape.
- connection portion 38a is a part of a member that electrically connects the solder ball (external electrode) 40 and the wiring 38.
- the stress relaxation layer 41 is easily deformed. This makes it easier for the stress relieving layer 41 to absorb the stress.
- the space 43 can be formed by performing isotropic dry etching on the stress relaxation layer 36 shown in FIG. In other words, according to the isotropic dry etching, the etching rates in the horizontal direction and the depth direction are almost equal, and therefore, as shown in FIG. 5, the constriction under the brim portion 48 a of the stress transmitting portion 48 is performed. Etching can be performed in different shapes. Thereby, the space 43 can be formed.
- FIG. 6 is a cross-sectional view illustrating a semiconductor device according to the sixth embodiment.
- the semiconductor device 45 shown in the same figure is obtained by adding an auxiliary transmission section 47 to the semiconductor device 39 shown in FIG.
- the auxiliary transmission portion 47 is formed on the outer periphery of the solder ball 40 continuously from the stress relaxation layer 41.
- the auxiliary transmission portion 47 is interposed between at least the outer periphery of the solder ball 40 and the stress relaxation layer 41.
- the semiconductor device 45 having such an auxiliary transmission section 47 has the same structure as that of the fifth embodiment after forming the stress relaxation layer 36 and the auxiliary transmission layer 33 as shown in FIG. It can be manufactured by performing etching by a method.
- connection portion 38-a is a part of a member that electrically connects the solder ball (external electrode) 40 and the wiring 38.
- FIG. 7 is a cross-sectional view illustrating a semiconductor device according to a seventh embodiment.
- the seventh embodiment has the features of both the first and second embodiments.
- a semiconductor device 50 is such that a wiring 58 is formed between first and second stress relaxation layers 56 and 57. Specifically, a first stress relieving layer 56 is formed on the semiconductor chip 52 avoiding the electrode 54, and a wiring 58 is formed from the electrode 54 to the stress relieving layer 56. .
- This configuration is the same as in the first embodiment.
- a second stress relaxation layer 57 is formed on the wiring 58.
- the second stress relieving layer 57 may be provided with a thickness in the same range as the first stress relieving layer 56 described above.
- a hole 57 a is formed in the stress relaxation layer 57, and a chromium (Cr) layer 62 and a copper (Cu) layer 64 are formed so as to penetrate the stress relaxation layer 57. Have been.
- the wiring 18 described in the first embodiment may be used instead.
- the chromium (Cr) layer 62 and the copper (Cu) layer 64 are widened with a relatively wide width.
- a pedestal 66 is formed on the copper (Cu) layer 64, and a solder ball 60 is formed on the pedestal 66.
- a second portion is formed from a stress transmitting portion 68 formed by a part of the chrome (Cr) layer 62, the copper (Cu) layer 64 and the pedestal 66.
- the stress from the solder ball 60 is transmitted to the stress relaxation layer 57.
- the stress transmitting portion 68 is provided at an outer peripheral position than the connecting portion 58a.
- the connecting portion 58 a is a part of the chrome (Cr) layer 62, and is a part of a member for electrically connecting the solder ball (external electrode) 60 and the wiring 58. It is.
- the stress in the vertical direction from the solder ball 60 is equal to the connection portion 58
- the light is transmitted to and absorbed by the first stress relaxation layer 56 via a, and is transmitted to and absorbed by the second stress relaxation layer 5-7 via the stress transmission portion 68.
- the second stress relaxation layer 57 also serves as a protective film for the wiring 58 and the semiconductor chip 52.
- groove 35 and the constricted shape of the stress relaxation layer 41 or the auxiliary transmission portion 47 of the fourth to sixth embodiments may be applied to the second stress relaxation layer 57 of the present embodiment.
- FIG. 8 is a sectional view showing a semiconductor device according to the eighth embodiment.
- the semiconductor device 51 shown in the figure has a structure in which an auxiliary transmission layer 53 is formed on the first stress relaxation layer 57 of the semiconductor device 50 shown in FIG.
- the connection portion 58 a is a part of a member for electrically connecting the solder ball (external electrode) 60 and the wiring 58.
- the auxiliary transmission layer 53 is formed in contact with at least the root outer periphery of the solder ball 60. Therefore, the stress is transmitted from the solder ball 60 to the stress relaxation layer 57 via the auxiliary transmission layer 53. By doing so, the stress is dispersed, and it is possible to prevent the stress from being concentrated on the joint between the solder ball 60 and the stress transmitting portion 68.
- auxiliary transmission layer 53 Note that the material and forming method of the auxiliary transmission layer 53 are the same as in the third embodiment, and a description thereof will be omitted.
- FIG. 9 is a sectional view showing a semiconductor device according to the ninth embodiment.
- the ninth embodiment is a modification of the seventh embodiment.
- a semiconductor device 70 is such that a wiring 78 is formed between first and second stress relaxation layers 76 and 77. More specifically, a first stress relieving layer 76 is formed on the semiconductor chip 72 avoiding the electrode 74, and a wiring 78 is formed from the electrode 74 to the stress relieving layer ⁇ 6. .
- a second stress relaxation layer 77 is formed on the wiring 78.
- the copper (CU) layer 82 by sputtering, the copper (Cu) layer 84 by sputtering, the copper (Cu) layer 86 by sputtering, and the plating A pedestal 88 is formed.
- a solder ball 80 is formed on the base 88.
- the copper (Cu) layer 82 and the copper (Cu) layer 84 have larger areas than the base 88 a of the pedestal 88 and the copper (Cu) layer 86.
- the stress transmitting portion corresponding to the outer peripheral position of the base end portion 88a in the copper (Cu) layer 82 and the copper (Cu) layer 84.
- the stress transmitting portion 89 transmits the stress from the solder ball 80 to the first stress relaxation layer 76.
- a part of the stress transmitting portion 89 (the contact portion with the base end portion 88a) is formed between a solder ball (external electrode) 80 and the wiring 78 by a portion of a member for electrically connecting the both. Department).
- the first stress relaxing layer 76 since the stress transmitting portion 89 is formed at the outer peripheral position of the base end portion 88a for electrically connecting the solder ball 80 and the wiring 78, the first stress relaxing layer 76 has a large area. It can transmit stress. In the present embodiment, the stress can be absorbed by the second stress relaxation layer 77 even if the first stress relaxation layer 76 is omitted.
- a stress transmitting portion 87 similar to the stress transmitting portion 68 (see FIG. 7) of the seventh embodiment is further formed, and the same operation and effect are achieved.
- FIG. 10 is a sectional view showing a semiconductor device according to the tenth embodiment.
- the tenth embodiment is a modification of the ninth embodiment. Therefore, only the difference from the ninth embodiment will be described.
- the copper (Cu) layer 92 and the copper (Cu) layer 93 formed on the wiring 91 are smaller than the stress transmitting portion 94. Therefore, although the stress which tries to incline the solder ball 95 is transmitted from the stress transmitting portion 94, it is difficult to transmit from the copper (Cu) layer 92 and the copper (Cu) layer 93. And the copper (Cu) layer
- the 92 and the copper (Cu) layer 93 do not function as a stress transmitting section, stress is hardly transmitted to the wiring 91. By doing so, disconnection of the wiring 91 can be prevented.
- a part of the stress transmitting part 94 is a part (connecting part) of a member for electrically connecting the solder ball (external electrode) 95 and the wiring 91.
- First Embodiment-FIGS. 11A and 11B are views showing a semiconductor device according to a first embodiment.
- FIG. 11B is a plan view of FIG. 11A taken along the line XI-XI.
- solder balls 114 are supported by the stress transmitting portions 112 at positions not in contact with the electrical connection portions 110.
- a wiring 106 is formed on an oxide film 104 formed on the semiconductor chip 102.
- the wiring 106 electrically connects the pad 106 a located at the center of the solder ball 114 to the electrode 108.
- the wiring 106 is formed in a direction perpendicular to the direction of the stress (indicated by the arrow in FIG. 11B) caused by the difference in thermal expansion coefficient between the mounting substrate and the semiconductor device 100. Extending from. Therefore, even if a stress is applied to the wiring 106, no force is applied in the extending direction in the vicinity of the node 106 a, so that it is difficult to disconnect.
- a stress relaxation layer 118 is formed on the wiring 106.
- a hole is formed in the stress relaxation layer 118, and the connecting portion 110 electrically connects the pad 106a to the solder ball 114. It is formed so that.
- the connecting portion 110 is a part of a member for electrically connecting the solder ball (external electrode) 114 and the wiring 106.
- a plurality of stress transmitting portions 112 are provided between the oxide film 104 and the solder ball 114 at the outer peripheral position and the non-contact position of the connecting portion 110. For this reason, a plurality of holes are formed in the stress relaxation layer 118.
- the connecting portion 110 and the stress transmitting portion 112 are formed continuously as projections projecting downward from a pedestal 116 receiving the solder balls 114.
- solder ball 114 is electrically connected to the wiring 106 at the center position by the connecting portion 110.
- a stress transmitting portion 112 is provided at an outer peripheral position of the connecting portion 110 and at a non-contact position. Therefore, since it is in a non-contact state, it is difficult to transmit the effect of the stress transmitted by the stress transmitting portion 112 to the connecting portion 110, so that the Disconnection can be prevented by not transmitting stress to the line 106.
- the pedestal 1 16 is partially in contact with the stress relaxation layer 1 18.
- the contact portion 116a located on the outer periphery of the stress transmitting portion 110 transmits and absorbs stress to the stress relieving layer 118.
- FIGS. 12A and 12B are views showing the semiconductor device according to the 12th embodiment.
- FIG. 12B is a plan view of the XI I—XI I position of FIG. 12A.
- the 12th embodiment is a modification of the above-described 11th embodiment. Therefore, differences from the first embodiment will be described.
- the semiconductor device 120 has first and second stress relaxation layers 122 and 124.
- the wirings 126 are formed on the first stress relaxation layers 122, and the stress transmitting portions 128 are formed on the first stress relaxation layers 124. Therefore, the stress from the solder ball 130 is transmitted from the stress transmission section 128 to the first stress relaxation layer 122 and absorbed.
- the connection section 132 formed on the pad 126a has the same configuration as the connection section 110 shown in FIG. That is, the connection portion 132 is a part of a member that electrically connects the solder ball (external electrode) 130 and the wiring 126.
- the stress is relieved by the first stress relieving layer 122 via the stress transmitting portion 128. Therefore, the pedestal 134 is formed in a brim-like shape at the outer peripheral position of the stress transmitting portion 128, and the contact portion with the second stress relaxation layer 124 is omitted.
- a contact portion may be provided as in the eleventh embodiment.
- FIG. 13 is a diagram illustrating the semiconductor device according to the thirteenth embodiment.
- the thirteenth embodiment is a modification of the above-described eleventh embodiment or the twelfth embodiment.
- the semiconductor device 140 shown in FIG. 13 has a cylindrical stress transmitting portion 142 instead of the plurality of columnar stress transmitting portions 112 shown in FIGS. 11A and 11B.
- the stress transmitting portion 144 is partially cut out to introduce the wiring 144 inside, so that the stress transmitting portion 144 does not contact the wiring 144. With such a stress transmitting part 1 4 2
- the same operation and effect as the eleventh embodiment can be achieved.
- connection portion for electrically connecting the solder ball (external electrode) and the wiring is the same as in the 12th embodiment.
- FIG. 14 is a diagram illustrating the semiconductor device according to the fourteenth embodiment. Also in the semiconductor device 150 shown in the figure, the first stress relaxation layer 154 is formed on the semiconductor chip 152. However, a substantially ring-shaped groove 156 is formed in the stress relaxation layer 154. Then, an island portion 158 partitioned by the groove 156 is formed. Further, a wiring 159 is formed so as to reach the island portion 158. More specifically, the groove 156 has a C-shape to form the wiring 159.
- a second stress relaxation layer 160 is formed on the first stress relaxation layer 154.
- a hole 160a extending to the outside of the groove 156 is formed.
- a pedestal 162 is provided on the wiring 159 formed on the substrate and above the substrate via a metal thin film formed by a sputter ring.
- the base 16 2 is provided with a solder ball 16 4.
- the groove portion 156 separates the island portion 158 from the region that receives the stress from the solder ball 164. Therefore, stress is not easily transmitted to the wiring 159, and disconnection can be prevented.
- connection part which is a part of a member for electrically connecting the solder ball (external electrode) and the wiring is the same as in the 12th embodiment.
- FIG. 15 is a diagram illustrating the semiconductor device according to the fifteenth embodiment.
- the semiconductor device 170 shown in the figure is the same as the above-described embodiment in that a bump 174 is provided on the stress relieving layer 172 to absorb stress.
- the feature of the present embodiment is that the wiring 176 has a bent portion 180 forming a hollow space between the wiring 176 and the semiconductor chip 178, and the gel material 182 is injected into the hollow space. is there. Note that the gel material 18 2 may be omitted because it is injected for reinforcement.
- the wiring 176 is preferably made of gold from the viewpoint of extensibility.
- a resist is deposited so as to outline the bent portion 180, a wiring 176 is formed thereon, and then the resist is dry-etched or wet-etched. It may be removed by etching. Note that a material other than a resist can be used as long as etching is possible.
- a wiring protection layer such as a solder resist as the outermost layer in order to prevent wiring corrosion and the like.
- connection part which is a part of a member for electrically connecting a solder ball (external electrode) and a wiring is formed by the first and second parts. This is the same as the embodiment.
- FIG. 16 is a diagram illustrating the semiconductor device according to the sixteenth embodiment.
- the semiconductor device 190 shown in the figure includes a first wiring 194 formed on the semiconductor chip 192 and a first stress relaxation layer 1 formed on the wiring 194. And a second wiring 198 formed on the stress relaxation layer 196.
- a hole is formed in the first stress relaxation layer 1996 on the first wiring 1994, and a hole is formed from the first wiring 1994 to the first stress relaxation layer 1996.
- a second wiring 198 is formed.
- a copper (Cu) layer 200 formed by plating is provided on the second wiring 198, and a second stress relaxation layer 2 is provided on the copper (Cu) layer 200. 0 2 is formed. Also, a hole 202 a is formed in the second stress relaxation layer 202 on the copper (Cu) layer 200. Then, bumps 204 are provided on the copper (Cu) layer 200. Note that a part of the bump 204 comes into contact with the second stress relaxation layer 202 so that stress can be transmitted.
- the connection portion 206 of the first and second wires 194, 198, and the connection portion 208 of the second wire 198, and the bump 2.04, And are arranged at positions shifted from each other in a plane.
- connection portion 206 refers to a portion where the first and second wires 194 and 198 are in contact with each other, and the connection portion 208 corresponds to the second wire 198 and the bumps 204. Refers to the part that contacts.
- the connecting portions 206 and 208 form a part of a member for electrically connecting the wiring 194 and the bump (external electrode) 204.
- FIG. 17A to FIG. 18C are views showing the method for manufacturing the semiconductor device according to the present embodiment.
- an electrode 302 and other elements are formed on the wafer 300 until the state before dicing is performed by a known technique (see FIG. 17A).
- the electrode 302 is formed of aluminum.
- an aluminum alloy-based material for example, aluminum silicon-aluminum silicon copper or the like
- a copper-based material may be used.
- a passivation film (not shown) made of an oxide film or the like is formed on the surface of wafer 300 to prevent a chemical change.
- the passivation film is formed not only to avoid the electrodes 302 but also to avoid the scribe lines where dicing is performed. By not forming the passivation film on the scribe line, it is possible to avoid the generation of dust generated by the passivation film at the time of dicing, and also to prevent the generation of cracks in the passivation film. Subsequently, sputtering is performed using the wafer 300 as an evening target to remove foreign substances on the surface of the wafer 300 (that is, reverse sputtering).
- a titanium tungsten (TiW) layer 304 and a copper (Cu) layer 303 are formed by sputtering on the entire surface of the wafer 300. I do.
- the present manufacturing process will be described using an example in which titanium tungsten (TiW) and copper (Cu) are used as the wiring, but the present invention is not limited to this.
- a copper plating layer 308 is formed on the copper layer 306 by an electric plating method.
- the thickness of each layer is, for example,
- Copper plating layer 0.5-5m
- the degree may be used.
- the titanium tungsten layer 304, the copper layer 306, and the copper plating layer 308 were subjected to dry etching by applying photolithography technology to perform wiring 3 Form 10
- a photoresist (not shown) is applied on the copper plating layer 308, prebaked, exposed and developed, washed, dried and postbaked. Then, the copper plating layer 308 and the copper layer 306 are dry-etched and rinsed, and the titanium-tungsten layer 304 is dry-etched. Subsequently, the photoresist is peeled off and washed. Thus, the wiring 310 is formed as shown in FIG. 17B.
- the wiring 310 is subjected to asshing with O 2 plasma to dehydrate the wafer 300, and then, as shown in FIG. 17C, the entire surface of the wafer 300 is exposed to poly. Apply mid-resin 3 1 2.
- the polyimide resin 312 becomes a stress relaxation layer in the same manner as the stress relaxation layer 36 shown in FIG.
- the adhesion between the wiring 310 and the wafer 300 and the polyimide resin 312 is improved.
- polyimide resin 312 As polyimide resin 312, a resin that has high adhesion with the passive film of wafer 300, low Young's modulus, low water absorption, and large film thickness can be used. Is preferred.
- the polyimide resin 312 is subjected to steps of prebaking, exposure, drying, development, washing, drying and curing. In this way, as shown in FIG. 17D, holes 3 14 are formed in the polyimide resin 3 12.
- Polyimide resin 312 is used for wiring 310 and The hole 3 14 is shrunk by drying and curing steps in a state in which the hole 3 14 is in close contact with the wafer 300, and a taper of about 60 to 70 ° is attached to the inner surface of the hole 3 14. Therefore, it is preferable to select the polyimide resin 312 having a tape attached to the inner surface of the hole 314.
- a titanium tungsten (TiW) layer 316 and a copper (Cu) layer 318 are overlapped on the entire surface of the polyimide resin 312 by sputtering. Form. Then, a copper plating layer 320 is formed on the copper layer 318 by an electric plating method. Note that a titanium (Ti) layer may be formed instead of the titanium sosten layer 316.
- the thickness of each layer is, for example,
- Titanium tungsten layer 1 0 0 0 A ( 10-10 m)
- Copper plating layer 0.5 to 100 ⁇ m
- the degree may be used.
- a photoresist is applied on the copper plating layer 320, prebaked, exposed, developed, washed, dried and postbaked, and then the copper plating layer 320 and the copper are plated. Etch layers 3 18. Then, after cleaning, the titanium tungsten layer 316 is etched, and the photoresist is peeled off for cleaning.
- the stress transmitting portion 3222 is formed on the wiring 310. Then, the stress transmission portion 3 2 2 performs Atsushingu by 0 2 plasma.
- solder paste 3 2 4 is provided in the stress transmitting section 3 22.
- the solder paste 3 2 4 can be provided, for example, by screen printing. Also, if the particle size of the solder paste 32 is set to about 25 to 15 m, the removal from the print mask is good. Or solder paste 3 2 4 It may be provided by a method.
- solder paste 324 is melted through one step of a riff opening to form a solder ball 326 as shown in FIG. 18C by the surface tension. Then, flux cleaning is performed.
- the process of forming the external terminals to be connected to the mounting board can be performed in the wafer process, and the conventional packaging process, that is, the handling of individual semiconductor chips, is performed for each semiconductor chip. In each case, it is not necessary to perform the inner lead bonding step or the external terminal forming step. Also, when forming the stress relaxation layer, a substrate such as a patterned film is not required. For these reasons, a low-cost and high-quality semiconductor device can be obtained. (Other embodiments)
- FIG. 19 shows a typical CSP type semiconductor device.
- wirings 3 are formed from the electrodes 2 of the semiconductor chip 1 toward the center of the active surface 1 a, and each wiring 3 is provided with an external electrode 5. Since all the external electrodes 5 are provided on the stress relieving layer 7, the stress when mounted on a circuit board (not shown) can be relieved.
- a solder resist layer 8 is formed as a protective film in a region excluding the external electrode 5.
- the stress relaxation layer 7 is formed at least in a region surrounded by the electrode 12. Note that the electrode 2 indicates a portion connected to the wiring 3. Also, in consideration of securing a region for forming the external electrode 5, although not shown in FIG. 19, the stress relaxation layer 7 is present at a position on the outer periphery of the electrode 2 and the wiring 3 is routed thereover. Alternatively, the external electrode 5 may be provided in the same manner.
- the electrode 2 is an example of a so-called peripheral electrode type located at the peripheral portion of the semiconductor chip 1, but it is also possible to use an area array type semiconductor chip in which electrodes are formed in a region inside the peripheral region of the semiconductor chip. good.
- the stress relaxation layer 7 may be formed so as to avoid at least a part of the electrode 2.
- the external electrode 5 is provided not on the electrode 2 of the semiconductor chip 1 but in the active area of the semiconductor chip 1 (the area where the active elements are formed).
- the external electrode 5 can be provided in the active area by providing the stress relaxation layer 7 in the active area and further arranging (pulling) the wiring 3 in the active area. That is, pitch conversion can be performed. Therefore, when arranging the external electrode 5, an active area, that is, an area as a constant surface can be provided, and the degree of freedom of the setting position of the external electrode 5 is greatly increased.
- the external electrodes 5 are provided so as to be arranged in a lattice by bending the wiring 3 at a required position. Since this is not an essential configuration of the present invention, the external electrodes 5 do not necessarily have to be provided so as to be arranged in a grid.
- the wiring when the external stress applied to the solder ball portion is concentrated on the wiring, the wiring is designed to be curved (or bent) in a plane direction, or in addition to or in addition to this.
- stress concentration on the wiring can be dispersed.
- Such a semiconductor device can be manufactured by performing almost all of the steps in a wafer hop process. Specifically, a plurality of electrodes 2 are formed on the wafer, a stress relaxation layer 7 is provided on the wafer 18 avoiding these electrodes 2, and a wiring 3 is formed from the electrodes 2. Thereafter, the wafer is cut into individual pieces to obtain a semiconductor device.
- a technique for forming a metal thin film such as sputtering or etching can be applied.
- a solder plating step can be applied to the formation of the external electrodes 5.
- photolithography for exposing and developing a photosensitive resin can be applied to the formation processing of the stress relaxation layer 7. All of these steps can be performed in a wafer process.
- the stress relaxation layers 7, the wirings 3, and the external electrodes 5 of many semiconductor devices can be formed at the same time.
- the manufacturing process can be simplified.
- FIG. 20 shows a circuit board 100 on which the semiconductor device 110 manufactured by the method according to the above-described embodiment is mounted.
- an organic substrate such as a glass epoxy substrate is used as the circuit board.
- Wiring patterns made of, for example, copper are formed on a circuit board so as to form a desired circuit, and these wiring patterns are electrically connected to external electrodes of the semiconductor device by mechanically connecting them.
- the above-described semiconductor device is provided with a structure for absorbing a strain generated by a difference in thermal expansion with the outside as a stress relaxation portion, even when the semiconductor device is mounted on a circuit board at the time of connection and thereafter. Reliability can be improved.
- the wiring of the semiconductor device is devised, reliability at the time of connection and after connection can be improved.
- the mounting area can be reduced to the area mounted with bare chips. For this reason, if this circuit board is used for an electronic device, the size of the electronic device itself can be reduced. Also, more mounting space can be secured within the same area, and higher functionality can be achieved.
- FIG. 1 As an electronic apparatus including the circuit board 100, a notebook personal computer 1200 is shown in FIG.
- the present invention can be applied to various electronic components for surface mounting regardless of whether it is an active component or a passive component.
- Electronic components include, for example, resistors, capacitors, coils, oscillators, filters, temperature sensors, thermistors, ballys, volumes or fuses.
- a predetermined electronic element is used in place of the semiconductor element of the above-described embodiment.
- the stress can be relieved by the stress relieving portion to prevent disconnection of the wiring.
- the manufacturing method is the same as that of the above-described embodiment, and the description is omitted.
Description
Claims
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/142,856 US6323542B1 (en) | 1997-01-17 | 1998-01-16 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
AU54959/98A AU5495998A (en) | 1997-01-17 | 1998-01-16 | Electronic component, semiconductor device, manufacturing method therefor, circuit board and electronic equipment |
KR1019980707333A KR100540303B1 (ko) | 1997-01-17 | 1998-01-16 | 전자부품,반도체장치,이것들의제조방법,회로기판및전자기기 |
JP53270398A JP3811957B2 (ja) | 1997-01-17 | 1998-01-16 | 電子部品及び半導体装置 |
EP98900382A EP0917195A4 (en) | 1997-01-17 | 1998-01-16 | ELECTRONIC COMPONENT, SEMICONDUCTOR DEVICE, MANUFACTURING METHOD, PRINTED BOARD, AND ELECTRONIC EQUIPMENT |
KR10-2004-7004846A KR20040037234A (ko) | 1997-01-17 | 1998-01-16 | 반도체 장치, 전자 부품, 이것들의 제조 방법, 회로 기판및 전자 기기 |
US10/331,510 US7235881B2 (en) | 1997-01-17 | 2002-12-31 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
US11/785,880 US7307351B2 (en) | 1997-01-17 | 2007-04-20 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
US11/976,835 US7485973B2 (en) | 1997-01-17 | 2007-10-29 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
US12/343,166 US7755205B2 (en) | 1997-01-17 | 2008-12-23 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
US12/794,401 US7888177B2 (en) | 1997-01-17 | 2010-06-04 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
US12/983,733 US8399999B2 (en) | 1997-01-17 | 2011-01-03 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP1991597 | 1997-01-17 | ||
JP9/19915 | 1997-01-17 |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
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US09/142,856 A-371-Of-International US6323542B1 (en) | 1997-01-17 | 1998-01-16 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
US09142856 A-371-Of-International | 1998-01-16 | ||
US09/953,858 Continuation US6518651B2 (en) | 1997-01-17 | 2001-09-18 | Electronic component, semiconductor device, methods of manufacturing the same, circuit board, and electronic instrument |
Publications (1)
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WO1998032170A1 true WO1998032170A1 (fr) | 1998-07-23 |
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PCT/JP1998/000130 WO1998032170A1 (fr) | 1997-01-17 | 1998-01-16 | Composant electronique, dispositif a semiconducteur, procede de fabrication, carte imprimee et equipement electronique |
Country Status (8)
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US (8) | US6323542B1 (ja) |
EP (1) | EP0917195A4 (ja) |
JP (2) | JP3811957B2 (ja) |
KR (3) | KR100531976B1 (ja) |
CN (4) | CN100378978C (ja) |
AU (1) | AU5495998A (ja) |
TW (1) | TW448524B (ja) |
WO (1) | WO1998032170A1 (ja) |
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US8913398B2 (en) | 2005-11-18 | 2014-12-16 | Nec Corporation | Mount board and electronic device |
JP2008082952A (ja) * | 2006-09-28 | 2008-04-10 | Mitsubishi Electric Corp | 半導体感歪センサ |
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