WO2004047167A1 - 半導体装置、配線基板および配線基板製造方法 - Google Patents
半導体装置、配線基板および配線基板製造方法 Download PDFInfo
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- WO2004047167A1 WO2004047167A1 PCT/JP2003/014917 JP0314917W WO2004047167A1 WO 2004047167 A1 WO2004047167 A1 WO 2004047167A1 JP 0314917 W JP0314917 W JP 0314917W WO 2004047167 A1 WO2004047167 A1 WO 2004047167A1
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- wiring layer
- semiconductor chip
- base substrate
- wiring
- chip
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
- H01L23/147—Semiconductor insulating substrates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/16235—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation the bump connector connecting to a via metallisation of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/32225—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73201—Location after the connecting process on the same surface
- H01L2224/73203—Bump and layer connectors
- H01L2224/73204—Bump and layer connectors the bump connector being embedded into the layer connector
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- 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
- H01L2924/095—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00 with a principal constituent of the material being a combination of two or more materials provided in the groups H01L2924/013 - H01L2924/0715
- H01L2924/097—Glass-ceramics, e.g. devitrified glass
- H01L2924/09701—Low temperature co-fired ceramic [LTCC]
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- 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
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12044—OLED
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- 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
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
- H01L2924/15311—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a ball array, e.g. BGA
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- 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
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
- H01L2924/1815—Shape
- H01L2924/1816—Exposing the passive side of the semiconductor or solid-state body
- H01L2924/18161—Exposing the passive side of the semiconductor or solid-state body of a flip chip
Definitions
- Patent application title Semiconductor device, wiring board, and wiring board manufacturing method
- the present invention relates to a semiconductor device, a wiring substrate used for the semiconductor device, and a method of manufacturing the wiring substrate, and more particularly to a face-down type flip-chip type semiconductor device, a wiring substrate used for a flip-chip type semiconductor device, and a method of manufacturing the wiring substrate.
- FIG. 1 is a cross-sectional view showing the structure of a conventional semiconductor device.
- a semiconductor device using such a semiconductor packaging technology and a flip-chip connection technology is a flip-chip pole grid array (FCBGA) as shown in FIG. 1, which is compact, miniaturized, and has a large number of pins.
- FCBGA flip-chip pole grid array
- the wiring resistance is lower than that of the wire bonding type semiconductor package that connects the semiconductor chip and the interposer substrate with gold wires. Since it is more suitable for high-speed operation, it is expected to expand applications in the future.
- interposer substrate materials are broadly classified into resin materials and ceramic materials, and resin material substrates that are superior in terms of manufacturing cost and electrical characteristics are often used.
- Japanese Patent Application Laid-Open No. 08-166730 discloses a method in which a wiring is formed in a polymer material having a low thermal expansion coefficient close to silicon, and the chip and the wiring are connected by through holes. The resulting structure is shown. This structure also has a smaller mounting area and shorter connection distance than wire bonding, and has a thermal expansion coefficient close to that of silicon to reduce thermal stress.
- the coefficient of linear expansion of a semiconductor chip mainly composed of silicon as a base material is about 2. 6 ppm / ° C, resin-based The difference of the plate is around 15 ppm / ° C, which is a large difference, and a large internal stress due to the difference in the coefficient of thermal expansion is inherent in the semiconductor device.
- the gap between the semiconductor chip and the interposer board is filled with resin to reinforce it and maintain its reliability.However, the increase in the size of the semiconductor chip accompanying the increase in external terminals is directly linked to the increase in internal stress However, it is expected that reliability cannot be ensured.
- the semiconductor chip is connected on the organic layer on which the capacitor is formed, so that the problem of thermal stress concentration due to a difference in expansion coefficient is avoided. Not done. Also, including the connection structure disclosed in the above-mentioned feature 08-166 7630, a package mounted on an interposer substrate whose thermal expansion coefficient is matched to silicon is not heat-resistant when mounted on a mother pad. There is a problem that reliability is reduced due to internal stress due to the difference in expansion.
- the low-k film which is considered to be applied as one of the measures against RC delay, has a silicon oxide (Si 2 ) film doped with fluorine, hydrogen, organic, or the like, or a dielectric material made of porous material. It is known that it is more fragile than conventional interlayer insulating films such as silicon oxide film due to its lowering rate. This means that the allowable limit of internal stress generated by the aforementioned difference in the linear expansion coefficient between the semiconductor chip and the interposer substrate is reduced, which will cause reliability problems when miniaturization and multi-pinning are advanced in the future. .
- an object of the present invention is to provide a semiconductor device that does not have the above problems. Further, it is an object of the present invention to provide a semiconductor device in which internal stress due to a difference in thermal expansion coefficient of a wiring board is reduced, reliability is improved, and further miniaturization and increase in the number of pins can be achieved. .
- an object of the present invention is to provide a wiring board for a semiconductor device, in which internal stress due to a difference in thermal expansion coefficient of the wiring board is reduced, reliability is improved, and further miniaturization and multi-pin configuration can be supported. It is in.
- an object of the present invention is to provide a method for manufacturing a wiring board for a semiconductor device, in which internal stress due to a difference in thermal expansion coefficient of the wiring board is reduced, reliability is improved, and further miniaturization and increase in the number of pins are supported. To provide.
- a semiconductor device in which a semiconductor chip is flip-chip mounted on a wiring board, wherein the wiring board includes: a base substrate; and a wiring layer forming surface on one surface of the base substrate.
- a wiring layer having an insulating layer and a wiring formed thereon; an electrode formed on a chip mounting surface that is a back surface of the wiring layer forming surface of the base substrate on which the semiconductor chip is mounted; and a wiring layer forming surface.
- a semiconductor device is provided which is equal to or less than a thermal expansion coefficient of the wiring layer of the semiconductor chip, and wherein the semiconductor chip is connected face-down to the chip mounting surface. Further, it is desirable that the coefficient of thermal expansion of the semiconductor chip be lower than the coefficient of thermal expansion of the wiring layer.
- this configuration is implemented on a mother board.
- the wiring layer of the wiring board is opposed to the mother board, and the wiring layer exists between the mother board board and the base board.
- the stress caused by the difference in thermal expansion between the substrates can be reduced, and the electrical connection reliability can be improved.
- a motherboard board has been described as an example of a board on which the wiring board of the present invention is mounted.However, the present invention is not necessarily limited to this. Any substrate may be used as long as the substrate is different from the substrate.
- the support substrate means a substrate on which the wiring substrate of the present invention is mounted on a substrate different from the base substrate.
- the material of the base substrate may be made of any of silicon, ceramic and photosensitive glass.
- a reinforcing frame material may be attached to at least a part of an outer peripheral portion of the chip mounting surface at a mounting position of the semiconductor chip. Further, it is desirable that the thermal expansion coefficient of the reinforcing frame material is equal to or lower than the thermal expansion coefficient of the wiring layer of the semiconductor chip.
- the thickness of the base substrate may be such that at least a part of an outer peripheral portion of the semiconductor chip mounting position on the chip mounting surface is thicker than a mounting position of the semiconductor chip on the chip mounting surface.
- a functional element may be formed on at least one of the wiring layer formation surface and the wiring layer.
- a wiring board on which a semiconductor chip is flip-chip mounted the wiring having a base substrate, an insulating layer formed on a wiring layer forming surface on one side of the base substrate, and wiring.
- a through-hole formed in the base substrate for electrically connecting the electrode formed on the surface with a thermal expansion coefficient of the base substrate equal to that of the semiconductor chip or a thermal expansion of the wiring layer.
- the material of the base substrate may be made of any of silicon, ceramic and photosensitive glass.
- a reinforcing frame material may be attached to at least a part of an outer peripheral portion of the chip mounting surface at a mounting position of the semiconductor chip.
- the thermal expansion coefficient of the reinforcing frame material is desirably equal to or lower than that of the semiconductor chip or the wiring layer.
- the thickness of the base substrate may be such that at least a part of an outer peripheral portion of the semiconductor chip mounting position on the chip mounting surface is thicker than a mounting position of the semiconductor chip on the chip mounting surface.
- a functional element may be formed on at least one of the wiring layer formation surface and the wiring layer.
- a wiring board including a base substrate, a wiring layer having an insulating layer formed on one surface of a wiring layer formed on the base substrate and wiring, and having a semiconductor chip flip-chip mounted thereon.
- a method of manufacturing a wiring board comprising: forming a non-through hole from the wiring layer forming surface side of the base substrate; filling the non-through hole with a conductive material to form a non-through hole on the wiring layer forming surface. Forming the first electrode, forming the wiring layer on the wiring layer forming surface, thinning the base substrate from the back surface of the wiring layer forming surface, exposing the non-through hole, and mounting the semiconductor chip. And a step of forming a second electrode to be mounted.
- a processing amount of at least a part of an outer peripheral portion of the mounting position of the semiconductor chip is smaller than a processing amount of the mounting position of the semiconductor chip, and the at least a part of the outer peripheral portion of the mounting position of the semiconductor chip and the semiconductor
- the method may further include a step of making the base substrate thin by providing a step with the mounting position of the chip.
- a functional element may be further formed.
- a wiring board manufacturing method for manufacturing a wiring board for flip-chip mounting a semiconductor chip comprising a base substrate and a wiring layer formed on a wiring layer forming surface on one surface of the base substrate. Forming a wiring layer on the wiring layer forming surface of the base substrate; forming a through hole penetrating only the base substrate from the back surface side of the wiring layer forming surface; Forming an electrode on which the semiconductor chip is mounted on the back surface of the wiring layer forming surface by filling with a conductive material.
- a processing amount of at least a part of an outer peripheral portion of the mounting position of the semiconductor chip is smaller than a processing amount of the mounting position of the semiconductor chip, and the at least a part of the outer peripheral portion of the mounting position of the semiconductor chip and the semiconductor
- the method may further include a step of reducing the thickness of the base substrate by providing a step with the mounting position of the chip.
- a functional element may be further formed.
- the wiring layer of the wiring substrate is formed on a highly rigid base substrate, it is advantageous for forming fine wiring patterns, and almost all semiconductor device manufacturing processes can be processed at a wafer level. High production efficiency makes it possible to reduce manufacturing costs.
- the reinforcing frame material is attached to at least a part of the outer periphery of the mounting position of the semiconductor chip on the chip mounting surface, so that the mounting position of the semiconductor chip on the base substrate is extremely thin.
- the rigidity of the base board can be maintained, and as a result, the warpage of the wiring board can be suppressed, and the mountability and reliability can be improved.
- capacitors, resistors, and inductors are formed on the wiring layer formation surface of the base substrate or on the wiring layer.
- functional elements such as capacitors, resistors, and inductors
- capacitors, resistors, inductors, and other components can be placed at optimal positions in the wiring layer.
- functional elements high-frequency characteristics can be improved and functions can be improved.
- the mounting area can be reduced and the degree of freedom in design can be improved.
- FIG. 1 is a cross-sectional view showing the structure of a conventional semiconductor device.
- FIG. 2A is a sectional view showing a first example of the structure of the semiconductor device according to the first embodiment of the present invention.
- FIG. 2B shows a second example of the structure of the semiconductor device according to the first embodiment of the present invention. It is sectional drawing.
- FIG. 2C is a cross-sectional view illustrating a third example of the structure of the semiconductor device according to the first embodiment of the present invention.
- 3A to 3F are cross-sectional views of the wiring board in each process chart relating to the method for manufacturing the wiring board of the semiconductor device according to the first embodiment of the present invention.
- FIG. 4 is a cross-sectional view illustrating a structure of a semiconductor device according to a second embodiment of the present invention.
- FIGS. 5A to 5E are cross-sectional views of the wiring board in each process chart relating to the method of manufacturing the wiring board of the semiconductor device according to the third embodiment of the present invention.
- FIG. 6 is a cross-sectional view illustrating a structure of a semiconductor device according to a fourth embodiment of the present invention.
- 7A to 7D are cross-sectional views of the semiconductor device of the fourth embodiment according to the present invention in the assembly process after the flip-chip joining process.
- FIG. 2A is a cross-sectional view showing a first example of the structure of the semiconductor device according to the first embodiment of the present invention.
- FIG. 2B is a cross-sectional view illustrating a second example of the structure of the semiconductor device according to the first embodiment of the present invention.
- FIG. 2C is a cross-sectional view showing a third example of the structure of the semiconductor device according to the first embodiment of the present invention.
- FIGS. 3A to 3F are cross-sectional views of the wiring board in each process chart relating to the method of manufacturing the wiring board of the semiconductor device according to the first embodiment of the present invention. In the first embodiment, referring to FIG.
- a single-layer or multi-layer wiring layer 5 is formed on one surface of a base substrate 3 made of silicon as the wiring substrate 2, and the uppermost electrode of the wiring layer 5 Has external connection bumps 7 formed thereon.
- the base substrate 3 has a through hole 4 for electrically connecting the wiring layer 5 to an electrode terminal on a surface of the base substrate 3 where the wiring layer 5 is not formed (hereinafter, referred to as a chip mounting surface).
- the electrode terminals on the chip mounting surface and the electrode terminals on the semiconductor chip 1 are connected by internal connection bumps 6 such as tin-zinc lead solder. Connected electrically and mechanically.
- RIE reactive ion etching
- the non-through hole is filled with Cu, which is the conductor 12, by the damascene method of Mekki, and the surface of the conductor 12 is flattened by chemical-mechanical polishing (CMP).
- CMP chemical-mechanical polishing
- the conductor can be filled by a CVD method, and a conductive resin can be used for the conductor in addition to the metal material.
- the upper Cu film that has been CMP-processed is patterned by etching, and the interlayer insulating film 14 is formed, via holes are formed, desmearing is performed, and the wiring 13 is formed.
- the wiring layer 5 is formed by a buildup method for forming a layer.
- FIG. 3C shows an example in which the wiring layer 5 has three layers, the wiring layer 5 is not limited to three layers.
- a part of the interlayer insulating film 14 is made of a ferroelectric material, and By forming a structure sandwiched between the power supply line and the ground line in layer 5, a parallel plate type capacitor is built in, and it can function as a decoupling capacitor. After that, a part other than the electrode 16a of the uppermost layer wiring is covered with a solder resist 15 such as polyimide to complete the structure on the external connection bump formation side.
- capacitors such as capacitors, resistors, and inductors are formed in the wiring layer 5, but the capacitor is formed by using a thin-film process on a silicon substrate on which a via filled with a conductor is formed. It is possible to use the conventional semiconductor diffusion process because it is formed on silicon, which may be used to form a functional element such as a semiconductor device. The accuracy is high, the cost of equipment investment is reduced, and the cost is reduced. It becomes possible.
- the substrate is covered with a support 17 to protect the surface layer on the wiring layer forming side before the silicon thinning treatment.
- the wafer is turned over, the silicon portion of about 700 m is thinned to about 200 m by mechanical polishing, and then further thinned to about 100 m by RIE to expose the non-through hole.
- thinning was performed by a combination of mechanical polishing and the RIE method in consideration of production cost and production efficiency.
- a layer with a normal strain is formed on the surface after mechanical polishing, and microcracks may occur depending on the conditions, which may cause deterioration in reliability.Therefore, the amount removed by mechanical polishing and the cutting speed etc. Careful consideration must be given to the conditions. You.
- thinning can be performed by mechanical polishing as long as reliability is not affected.
- the surface after the RIE process has a step due to a difference in etching rate due to a difference in material between the exposed portion of the through hole and the other portion. Therefore, the RIE-treated surface is flattened by CMP, and at the same time, the insulating layer 11b is completely removed to expose copper.
- An SiO 2 film of an insulating layer 11 c is formed thereon and patterned by a photolithography method.
- a cover film 18 of a silicon nitride film (SiN film) is formed, and the support 1 7 is peeled off to complete the wiring board 2.
- Si 0 2 and Si N are used for the insulating layers 1 la, li, and 11 c and the cover film 18.
- plasma C that can be formed at a relatively low temperature is used. It is also possible to use SiC, SiOF, and SiOC in the VD method.
- the semiconductor chip 1 is mounted face-down on the wafer-like wiring board 2 manufactured by the processes shown in FIGS. 3A to 3F, and reinforced with a sealing resin 8 as appropriate, and then singulated to form external connection bumps. 7 is formed to obtain a required semiconductor device. In this process, the work is advanced to near the final process in the state of (c), so that production efficiency is high and production and inspection costs can be reduced.
- the size of the semiconductor chip 1 exceeds 100 x 10 mm and the number of external output terminals exceeds 100,000 pins, the size of the wiring board 2 increases and it is said to be 40 to 50 mm. The size is increasing. In such a case, the strength of the thinly processed silicon substrate cannot be maintained, and there is a risk of breaking the wiring substrate 2 when the silicon substrate is separated.Thus, the silicon is thinned and the connection electrodes of the semiconductor chip are formed. After that, it is preferable that the stiffener 9 be attached and reinforced before the wiring board 2 is divided into individual sides, and then cut off. Further, if it is possible to carry out the manufacture of the wiring board and the mounting of the semiconductor chip continuously, it is preferable to mount the semiconductor chip 1 in a wafer state and separate the semiconductor chip 1 into individual parts.
- the insulating layer is provided on a supporting substrate, which is an example of a motherboard substrate. Any material can be used as long as it can reduce the difference in thermal expansion from the wire substrate. It is desirable that the thermal expansion coefficient of the support substrate and the base substrate be selected in consideration of the thermal expansion coefficient. Further, it is desirable that the thermal expansion coefficient of the insulating layer be smaller than the thermal expansion coefficient of the support substrate and smaller than that of the base substrate It is a large material.
- silicon is used for the semiconductor chip 1 and the base substrate 3 of the wiring substrate 2, but is not limited to silicon, and the base substrate 3 has a coefficient of thermal expansion of the semiconductor chip 1.
- a material having an expansion coefficient equal to or lower than the thermal expansion coefficient of the wiring layer 5 is used.
- Other than silicon for example, ceramics or photosensitive glass capable of forming micropores can be used.
- a base substrate having a through-hole is formed by placing a mask on which a hole forming pattern is drawn on photosensitive glass, exposing it to ultraviolet light having a predetermined wavelength component, developing by heat treatment, and removing the crystallized portion with acid. Assume 3.
- FIG. 4 is a cross-sectional view illustrating a structure of a semiconductor device according to a second embodiment of the present invention.
- a stiffener 9 serving as a reinforcing frame material is attached around the semiconductor chip 1 mounting surface of the base substrate 3 to increase the rigidity of the wiring board 2. ing. Since the rigidity of the wiring board 2 can be increased by the stiffener 9, the package thickness can be reduced by thinning the base substrate 3, or the heat sink 10 can be attached to the back surface of the semiconductor chip 1 by using the stiffener 9. It is possible to appropriately take measures to improve the cooling performance due to the increase in power consumption and heat generation of the bonded semiconductor chip 1.
- the material of the stiffener 9 is also preferably equal to the coefficient of thermal expansion of the semiconductor chip 1 or equal to or less than the coefficient of thermal expansion of the wiring layer 5 similarly to the base substrate 3.
- FIGS. 5A to 5E are cross-sectional views of the wiring board in each process chart relating to the method of manufacturing the wiring board of the semiconductor device according to the third embodiment of the present invention.
- a non-through hole is formed in the base substrate 3 and the wiring layer 5 is formed after filling with the conductor 12.
- the wiring layer 5 is first formed on the base substrate 3. The difference is that after forming the wiring layer 5, the through hole and the back electrode are formed to complete the wiring board 2.
- an insulating layer 11a and a wiring layer 5 are formed on a silicon base substrate 3 having a thickness of about 700 m by the same manufacturing method as in the first embodiment.
- the surface of the wiring layer 5 is covered with a support 17 to protect it, and after inversion, the base substrate 3 is mechanically ground from the rear surface to a thickness of about 180, and then the center portion is removed by RIE to a thickness of about 80 m.
- FIG. 4 is not shown because of the enlarged view, when removing the RIE, the 8.5 mm wide area around the substrate was masked, and only the central area was further thinned to give a step. By doing so, it is possible to further reduce the thickness of the through hole forming portion and to maintain the rigidity of the base substrate 3.
- the outer shape of the wiring board 2 is 30 mm, and the semiconductor chip 1 has an outer diameter of about 10 mm and a thickness of about 700 / m. Further, in this example, the through-hole forming portion and the peripheral portion of the wiring board 2 are integrated with the same material, but the stiffener 9 is attached around the smooth wiring substrate 2 as in the second embodiment. By attaching it, it is possible to maintain rigidity.
- a hole forming position is patterned by a photolithography process, and the insulating layer 11 c is opened.
- a through hole is formed by RIE removal to expose the wiring at the bottom of the wiring layer 5.
- the side and top surfaces of the through-hole are insulated by a TEOS film serving as an insulating layer 11b.
- the conductor 12 is filled with Cu by the damascene method and the surface is flattened by CMP, and then the electrode 16b is formed as shown in FIG.5D, and further shown in FIG.5E.
- the SIN cover film 18 As shown in FIG. Is completed
- FIG. 6 is a cross-sectional view illustrating a structure of a semiconductor device according to a fourth embodiment of the present invention.
- 7A to 7D are cross-sectional views of a semiconductor device in an assembly step after the flip-chip bonding step of the semiconductor device according to the fourth embodiment of the present invention.
- a step is provided around the base substrate 3 to reduce the thickness at the center, and the back surface is collectively polished after the semiconductor chip 1 is flip-chip mounted and resin-sealed.
- semiconductor devices as a whole are becoming thinner.
- the semiconductor chip 1 is flip-chip mounted on the wafer-like wiring board 2 with the support 17 adhered thereto.
- the sealing resin 8 is poured into the gap between the semiconductor chip 1 and the base substrate 3, and the sealing resin 8 is filled until the upper surface of the mounting body is covered with the sealing resin 8. Supply. This is performed in order to reduce the damage at the time of grinding the back surface of the semiconductor chip 1, and it is possible to appropriately change the resin supply amount and omit the process as long as there is no problem in the bonding portion and the element reliability.
- FIG. 7A the semiconductor chip 1 is flip-chip mounted on the wafer-like wiring board 2 with the support 17 adhered thereto.
- the sealing resin 8 is poured into the gap between the semiconductor chip 1 and the base substrate 3, and the sealing resin 8 is filled until the upper surface of the mounting body is covered with the sealing resin 8. Supply. This is performed in order to reduce the damage at the time of grinding the back surface of the semiconductor chip 1, and it is possible to appropriately change the resin supply amount and omit the process as long as there is no problem
- the back surface of the semiconductor chip 1 was ground to a thickness of about 50 zm, and the thickness of the semiconductor device excluding the external connection bumps 7 was set to about 220 m.
- the wiring layer 5 has a two-layer structure.
- the wafer is singulated by dicing to separate the support 17.
- the external connection bumps 7 are formed by the micropole mounting method, and the semiconductor device is completed.
- the method of forming the external connection bumps 7 other methods such as solder paste printing, vapor deposition, and electrolytic plating can be used. Can be changed appropriately in consideration of the above.
- the wiring board 2 was formed by forming a layer, attaching the layer to the support, and processing silicon thinner from the back surface to expose the mounting surface of the semiconductor chip 1.
- a wiring layer 5 is formed on a silicon substrate, silicon is thinly processed from its back surface, and then a through hole is formed to form a mounting surface of the semiconductor chip 1 and a wiring substrate 2 is formed. did.
- the mounting surface of the semiconductor chip 1 is finally processed.
- a via that becomes a through hole is formed in the base substrate 2 by RIE, and an insulating film is formed on the inner wall and the conductive film is formed.
- Pads for mounting the semiconductor chip 1 are formed by sequentially performing body filling and planarization by CMP. Thereafter, this surface is adhered to a support, and a through electrode is formed by appropriately combining mechanical grinding and dry etching for thinning the silicon from the back. Thereafter, a multilayer wiring layer is formed, and external terminals are formed to form a wiring board.
- a process that requires relatively high precision such as a process of forming electrodes on the mounting surface of the semiconductor chip 1 and a process of forming a functional element such as a capacitor, is performed before forming a support or a multilayer wiring layer.
- This has the advantage that technology based on the diffusion process of semiconductor manufacturing can be used.
- the diameter of the through via is set to 80 m.
- a large diameter of about 150 m can be used for a hole forming step for forming a via.
- the via diameter is desirably small, and a diameter of 50 m or less is adopted. It is possible to implement up to about 10 by selecting the via formation method.
- the via diameter is desirably 2% or less in terms of area with respect to the silicon wafer to be processed. If the layout is such that an 800-inch wafer can take 60 substrates with 400 pins, the diameter of the through via is 30%. m or less is most suitable, and from the viewpoint of the process of filling the via with the conductive material, the fillability is considered to be more preferably 10 m or more.
- the semiconductor chip 1 is connected to the base substrate 3 of the wiring board 2 having physical properties having similar thermal expansion coefficients, the internal stress due to the thermal expansion coefficient mismatch is significantly reduced.
- the reliability can be improved because the semiconductor device is mounted on the motherboard of the semiconductor device and the change in internal stress due to the temperature change in the operating environment is reduced. Clearing the permissible level of internal stress, such as increasing the size of the semiconductor chip 1, applying a fragile Low-k film to the interlayer insulating film, and reducing solder stress relaxation due to the use of lead-free soldering for the environment. It has the effect of being able to do it.
- the wiring layer 5 of the wiring board 2 is formed on the highly rigid base substrate 3, it is advantageous for forming a fine wiring pattern.
- the production efficiency is high and the manufacturing cost can be reduced.
- the resin material used for the interlayer insulating film that occupies most of the volume of the wiring layer 5 formed on the back surface of the chip mounting surface of the wiring board 2, Stress occurs due to the difference in the coefficient of thermal expansion between them, but the reinforcing frame material is attached to all or a part of the outer peripheral portion of the mounting position of the semiconductor chip 1 on the chip mounting surface. Even when the mounting position of the semiconductor chip 1 on the base substrate 3 is extremely thin, the rigidity of the base substrate 3 can be maintained, and as a result, the warpage of the wiring substrate 2 can be suppressed, and the mountability and reliability can be improved. It has the effect of being able to do it.
- the resin material used for the interlayer insulating film that occupies most of the volume of the wiring layer 5 formed on the back surface of the chip mounting surface of the wiring board 2, Stress occurs due to the difference in the coefficient of thermal expansion between the base substrate 3 and the semiconductor chip 1 on the chip mounting surface. Even when the mounting position of the chip 1 is extremely thin, the rigidity of the base substrate 3 can be maintained. As a result, the warpage of the wiring substrate can be suppressed, and the mountability and reliability can be improved. When thinning 3 Therefore, the process can be simplified and the cost can be reduced.
- a functional element such as a capacitor, a resistor, and an inductor on the wiring layer forming surface of the base substrate 3 or on the wiring layer 5, the wiring
- functional elements such as capacitors, resistors, and inductors at optimal positions, high-frequency characteristics can be improved and functions can be improved, and the mounting area can be reduced and design flexibility can be improved.
- the semiconductor device according to the present invention, the wiring board used for the semiconductor device, and the method of manufacturing the wiring board can be applied to any semiconductor device in which a semiconductor chip is flip-chip mounted on the wiring board. There is no limitation on the availability.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Wire Bonding (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/536,025 US7728439B2 (en) | 2002-11-21 | 2003-11-21 | Semiconductor device, wiring substrate, and method for manufacturing wiring substrate |
JP2004553229A JPWO2004047167A1 (ja) | 2002-11-21 | 2003-11-21 | 半導体装置、配線基板および配線基板製造方法 |
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JP2002337376 | 2002-11-21 | ||
JP2002-337376 | 2002-11-21 |
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WO2004047167A1 true WO2004047167A1 (ja) | 2004-06-03 |
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PCT/JP2003/014917 WO2004047167A1 (ja) | 2002-11-21 | 2003-11-21 | 半導体装置、配線基板および配線基板製造方法 |
Country Status (4)
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US (1) | US7728439B2 (ja) |
JP (2) | JPWO2004047167A1 (ja) |
CN (1) | CN100377337C (ja) |
WO (1) | WO2004047167A1 (ja) |
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- 2003-11-21 JP JP2004553229A patent/JPWO2004047167A1/ja active Pending
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JP2008305833A (ja) * | 2007-06-05 | 2008-12-18 | Disco Abrasive Syst Ltd | ウェーハの加工方法 |
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JP2011082531A (ja) * | 2008-12-26 | 2011-04-21 | Dainippon Printing Co Ltd | 貫通電極基板及びその製造方法 |
US8198726B2 (en) | 2008-12-26 | 2012-06-12 | Dai Nippon Printing Co., Ltd. | Through-hole electrode substrate and method of manufacturing the same |
US8623751B2 (en) | 2008-12-26 | 2014-01-07 | Dai Nippon Printing Co., Ltd. | Through-hole electrode substrate and method of manufacturing the same |
JP2013516060A (ja) * | 2009-12-24 | 2013-05-09 | アイメック | 窓介在型ダイパッケージング |
JP2012060185A (ja) * | 2011-12-22 | 2012-03-22 | Fujitsu Semiconductor Ltd | 半導体素子の実装方法及び半導体装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004047167A1 (ja) | 2006-03-23 |
CN100377337C (zh) | 2008-03-26 |
US7728439B2 (en) | 2010-06-01 |
JP2009206525A (ja) | 2009-09-10 |
CN1714444A (zh) | 2005-12-28 |
JP5099377B2 (ja) | 2012-12-19 |
US20060151870A1 (en) | 2006-07-13 |
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