WO2010058503A1 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- WO2010058503A1 WO2010058503A1 PCT/JP2009/004510 JP2009004510W WO2010058503A1 WO 2010058503 A1 WO2010058503 A1 WO 2010058503A1 JP 2009004510 W JP2009004510 W JP 2009004510W WO 2010058503 A1 WO2010058503 A1 WO 2010058503A1
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- Prior art keywords
- semiconductor
- hole conductor
- electrode
- semiconductor element
- semiconductor device
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Definitions
- the present invention relates to a semiconductor device used in a digital camera, a mobile phone, etc., for example, a light-receiving element such as a semiconductor image sensor or a photo IC, a light-emitting element such as an LED or a laser, and a general-purpose semiconductor device having various functions in general. It relates to a manufacturing method.
- a light-receiving element such as a semiconductor image sensor or a photo IC
- a light-emitting element such as an LED or a laser
- a general-purpose semiconductor device having various functions in general. It relates to a manufacturing method.
- chip mounting technology has been proposed in which a chip size package or bare chip semiconductor device is directly mounted.
- Patent Document 1 in a semiconductor image pickup device, a transparent plate is bonded onto an image pickup region of the semiconductor element with an adhesive to reduce the thickness and cost of the semiconductor image pickup device.
- an adhesive to reduce the thickness and cost of the semiconductor image pickup device.
- a protective member 24 such as glass is fixed on a semiconductor element 22 having an imaging region 21 with an adhesive 23, and a through hole 26 is formed immediately below an electrode 25 of the semiconductor element 22. Then, after the insulating layer 27 is formed on the inner wall of the through hole 26 and the back surface of the semiconductor element 22, the electrode 25 and the external electrode 30 formed on the back surface of the semiconductor element 22 are electrically connected by the conductor layer 28. An image sensor is obtained. As described above, the external size of the semiconductor image sensor is equivalent to that of the semiconductor element 22, that is, the so-called chip size is reduced.
- the area of the through-hole 26 on the external electrode 30 side is large due to the configuration of the through-hole 26 of the semiconductor element 22, which occurs when the semiconductor device is mounted on an electronic device substrate, for example. Due to the stress (in this case, the stress toward the external electrode, that is, the downward stress in the drawing), the through hole 26 is dropped from the semiconductor device, causing the semiconductor device and the electronic device substrate to cause an electrical short circuit failure. It was.
- micro cracks are easily generated in the through hole 26 of the semiconductor element 22, which has been a factor of deteriorating electrical characteristics as a semiconductor device.
- the present invention solves the above-described conventional problems, and can realize a highly reliable and mass-productive element structure that can suppress a decrease in yield as a product and suppress an increase in product cost.
- An object of the present invention is to provide a semiconductor device and a method for manufacturing the same.
- a semiconductor device of the present invention includes a semiconductor element in which a plurality of first electrode parts each having a protrusion part connected to one main surface are formed, and the protrusion part and the semiconductor element.
- a holding member that covers the first electrode portion and is joined in a state of being held via the protrusion, and is electrically connected through the first main surface and the other surface of the semiconductor element.
- the plurality of through-hole conductor portions are formed so that the hole diameter increases from the inner side of the semiconductor element toward the one main surface side, and the plurality of first electrode portions are respectively passed through the through-hole conductor portions.
- the semiconductor device is electrically connected to an external electrode formed on the other surface of the semiconductor element.
- the through-hole conductor portion is located immediately below the first electrode portion, and the hole diameter increases from the inner side to the other surface side of the semiconductor element. It is characterized by that.
- the semiconductor device and the electronic device substrate may cause an electrical short defect by making it difficult for the through-hole conductor portion to fall off due to stress generated when the semiconductor device is mounted on the electronic device substrate. Therefore, a highly reliable semiconductor device can be provided. Moreover, by making it difficult for micro cracks to enter the through-hole conductor portion itself, it is possible to provide a highly reliable semiconductor device without deteriorating the electrical characteristics of the semiconductor device.
- the through-hole conductor portion is located immediately below the first electrode portion, and the hole diameter is substantially the same from the inner side to the other surface side of the semiconductor element. It is characterized by being.
- a highly reliable semiconductor device can be provided, and when the through-hole conductor portion is manufactured by etching or the like, etching can be performed on one side of the semiconductor element, thereby suppressing an increase in manufacturing cost. be able to.
- the semiconductor device of the present invention is characterized in that the holding member is an optical member bonded to the semiconductor element in contact with the protrusion.
- the holding member is electrically connected in a state where a plurality of second electrode portions are formed on one main surface and the second electrode portion is bonded to the protruding portion with respect to the semiconductor element. It is a separate semiconductor element.
- the semiconductor device and the electronic device substrate may cause an electrical short defect by making it difficult for the through-hole conductor portion to fall off due to stress generated when the semiconductor device is mounted on the electronic device substrate.
- a highly reliable semiconductor device can be provided. Further, by making it difficult for micro cracks to enter the through-hole conductor portion itself, it is possible to provide a highly reliable semiconductor device without deteriorating the electrical characteristics of the semiconductor device.
- a method of manufacturing a semiconductor device comprising: a step of virtually dividing a semiconductor wafer at equal intervals to form a plurality of semiconductor elements; and a plurality of through-hole conductors on one main surface of each semiconductor element. Forming a first electrode portion on the upper surface of each upper portion of the through-hole conductor portion, and a step of forming the upper portion so that the hole diameter increases from the inner side of the semiconductor element toward the first main surface side. A step of connecting a protrusion to the upper surface of each of the first electrode portions; covering the protrusion and the first electrode portion with respect to the semiconductor wafer; and holding the protrusion via the protrusion.
- the through-hole conductor part A step of bonding the holding member to the state, a step of polishing the other surface of the semiconductor wafer, and a lower portion of the through-hole conductor portion in the vicinity immediately below the first electrode portion on the other surface of the semiconductor wafer.
- the through-hole conductor part A step of forming the hole diameter to increase from the inner side to the other surface side of the semiconductor element, and inner walls of the upper part of the through-hole conductor part and the lower part of the through-hole conductor part, Forming an insulating film on the other surface of the semiconductor wafer, the insulating film on the inner wall of the upper part of the through-hole conductor part and the lower part of the through-hole conductor part, and the inner wall of the lower part of the through-hole conductor part A conductor layer is formed on a part of the other surface of the semiconductor wafer on the insulating film, whereby the other surface side of the semiconductor wafer of the conductor layer serves as an external electrode, and the first through the conductor layer.
- a method of manufacturing a semiconductor device comprising: a step of virtually dividing a semiconductor wafer at equal intervals to form a plurality of semiconductor elements; and a plurality of through-hole conductors on one main surface of each semiconductor element. Forming a first electrode portion on the upper surface of each upper portion of the through-hole conductor portion, and a step of forming the upper portion so that the hole diameter increases from the inner side of the semiconductor element toward the first main surface side. A step of connecting a protrusion to the upper surface of each of the first electrode portions; covering the protrusion and the first electrode portion with respect to the semiconductor wafer; and holding the protrusion via the protrusion.
- the through-hole conductor part A step of bonding the holding member to the state, a step of polishing the other surface of the semiconductor wafer, and a lower portion of the through-hole conductor portion in the vicinity immediately below the first electrode portion on the other surface of the semiconductor wafer.
- the through-hole conductor part A step of forming the hole diameter to be substantially the same from the inner side to the other surface side of the semiconductor element, and an upper portion of the through-hole conductor portion and a lower portion of the through-hole conductor portion.
- the method includes a step of electrically connecting to the first electrode portion, and a step of dividing the semiconductor wafer into individual semiconductor elements to divide the semiconductor device into individual pieces.
- the method for manufacturing a semiconductor device of the present invention is characterized in that an optical member is used as the holding member, and the semiconductor wafer is bonded in a state of being in contact with the protruding portion.
- another semiconductor element having a plurality of second electrode portions formed on one main surface is used as the holding member, and the second electrode portion is projected from the semiconductor wafer. It is characterized in that it is joined to the part and electrically connected.
- a highly reliable semiconductor device can be provided.
- the semiconductor device and the electronic device substrate may cause an electrical short defect by making it difficult for the through-hole conductor portion to fall off due to stress generated when the semiconductor device is mounted on the electronic device substrate. Therefore, a highly reliable semiconductor device can be provided.
- FIG. 6 is a detailed cross-sectional view showing another configuration example 1 of the through-hole conductor portion in the semiconductor device of the embodiment. It is a detailed sectional view showing other configuration example 2 of the through-hole conductor portion in the semiconductor device of the same embodiment.
- FIG. 6 is a schematic sectional drawing according to process which shows the other manufacturing method of the semiconductor device of the embodiment. It is sectional drawing which shows the structure of the conventional semiconductor device.
- a semiconductor imaging element which is a kind of light receiving element will be described as an example.
- FIG. 1 is a schematic cross-sectional view for each process showing a method of manufacturing a semiconductor imaging device as a semiconductor device of the present embodiment.
- FIG. 2 is a detailed cross-sectional view of the through-hole conductor portion in the semiconductor image sensor as the semiconductor device of the present embodiment.
- 1 is a semiconductor wafer
- 2 is an imaging region
- 3 is an electrode portion (first electrode portion)
- 4 is a protrusion
- 5 is a cutting line
- 6 is a semiconductor element
- 7 is on the semiconductor element 6.
- 8 is an adhesive (transparent adhesive member)
- 9 is a through-hole conductor part lower part
- 9 ' is an through-hole conductor part upper part
- 12 is an external electrode (conductor layer)
- 13 is a solder ball
- 14 indicate insulating films.
- a plurality of semiconductor elements 6 are virtually divided into equal intervals in the semiconductor wafer 1 to form a plurality of semiconductor elements 6.
- the through-hole conductor part upper part 9 ' is formed.
- the through hole conductor portion upper portion 9 ′ is formed by selectively forming a resist corresponding to the through hole conductor portion upper portion 9 ′ on the back surface of the semiconductor wafer 1 and exposing the back surface of the semiconductor wafer 1.
- the insulating film 14 is formed by etching using plasma etching, wet etching, or the like, and then embedded with a conductive material.
- the imaging region 2 and the electrode unit 3 are arranged at predetermined positions on each semiconductor element 6 with respect to a plurality of semiconductor elements 6 virtually divided at equal intervals in the semiconductor wafer 1. Form the arrangement.
- the protrusion 4 is formed on the electrode portion 3 on the semiconductor element 6.
- the semiconductor wafer 1 is made of, for example, silicon, germanium, or a compound semiconductor material (for example, GaAs, InP, GaN, SiC, etc.), has a thickness of about 100 to 800 ⁇ m, and a size of 2 inches to 15 inches.
- a disk-shaped semiconductor substrate having a diameter of about ⁇ is used.
- the method for forming the protrusion 4 on the electrode 3 is a so-called ball bumping method.
- a ball bonder is used to form a ball-shaped protrusion formed at the tip of an Au metal fine wire (Au wire) on the semiconductor element 6.
- the upper electrode part 3 is joined by a method such as ultrasonic thermocompression bonding.
- the diameter of the Au wire to be used is about 15 to 30 ⁇ m ⁇ , and the size of the spherical protrusion formed on the tip of the Au wire is about 30 to 90 ⁇ m ⁇ .
- Au spherical projections have a load of about 10 to 100 g and a heating temperature of about 80 to 150 ° C.
- the protrusions 4 thus formed have a diameter of about 40 to 150 ⁇ m and a thickness of about 10 to 80 ⁇ m.
- the optical member 7 as a holding member to be bonded onto the semiconductor element 6 later and the surface of the imaging region 2 on the semiconductor element 6 are arranged.
- the distance can be made uniform, and a high-quality structure with little variation can be obtained as a semiconductor imaging device.
- the protruding portion 4 there is a method of forming Ni, Au, Cu or the like on the electrode portion 3 by plating, or a method of selectively forming a photosensitive resin on the electrode portion 3 by photolithography. is there.
- the protrusion 4 is larger than the rigidity of the adhesive 8 to which the optical member 7 is bonded later in any of the forming methods.
- the adhesive 8 has a larger displacement than the protrusion 4 with respect to the stress.
- the protrusion 4 has a modulus of elasticity of about 10 GPa to 300 GPa by using a metal such as Au as in this embodiment, and the adhesive 8 is usually epoxy, silicone, acrylic, etc. that do not contain a filler. Since the elastic modulus is usually about 0.01 to 10 GPa, the amount of displacement with respect to the stress can be easily increased with the adhesive 8.
- glass or the like is used on the semiconductor wafer 1 with an adhesive 8 so as to cover the surface of the imaging region 2 on each semiconductor element 6 formed in the semiconductor wafer 1.
- the optical member 7 is fixed.
- the material of the optical member 7 is glass or resin, and the thickness is about 0.05 to 1.0 mm.
- the size of the optical member 7 is the same as that of the semiconductor wafer 1 and is about 2 inches to 15 inches.
- the adhesive 8 is an epoxy, silicone, acrylic resin or the like.
- the adhesive 8 is applied on the semiconductor wafer 1.
- the application method include application using a dispenser, printing method, and spin coating using a spinner.
- the optical member 7 is installed on the semiconductor wafer 1.
- the optical member 7 is pressurized so that the optical member 7 contacts the protrusion 4.
- the method for forming the protrusion 4 described above is a method of forming the electrode part 3 before the optical member 7 is installed. However, when the optical member 7 is installed, the protrusion part 4 is formed on the portion located in the electrode part 3. A method of previously forming the semiconductor wafer 1 may be used.
- the method of installing the optical member 7 after applying the adhesive 8 has been described.
- the optical member 7 is attached to the semiconductor wafer 1.
- the adhesive 8 may be injected into the gap between the semiconductor wafer 1 and the optical member 7 formed by the protrusions 4 after being temporarily installed and fixed. At this time, by injecting in a vacuum, the adhesive 8 can be formed on the semiconductor wafer 1 in a short time without generation of bubbles.
- the adhesive 8 is cured and completed.
- the method of curing the adhesive 8 is performed by irradiating the adhesive 8 with ultraviolet rays through the optical member 7 when the adhesive 8 is an ultraviolet curing type.
- the adhesive 8 is a thermosetting type
- the adhesive 8 is cured by heating it to 50 to 200 ° C. with a curing furnace, a hot plate, an infrared lamp or the like.
- the back surface of the semiconductor wafer 1 is polished to reduce the thickness of the semiconductor wafer 1.
- the thickness of the polished semiconductor wafer 1 is about 10 to 500 ⁇ m.
- the polishing of the semiconductor wafer 1 is performed by a method such as mechanical polishing performed by a grindstone rotated while pressing the semiconductor wafer 1 or dry etching.
- the protrusion 4 has a higher rigidity than the adhesive 8, so that the load due to the pressure applied to the semiconductor wafer 1 is concentrated on the semiconductor wafer 1 immediately below the protrusion 4. Therefore, the amount of polishing of the semiconductor wafer 1 immediately below the protrusion 4 is larger than the amount of polishing in other regions, so that a recess corresponding to the through-hole conductor portion lower portion 9 is provided immediately below the protrusion 4 in the semiconductor wafer 1.
- a shape is formed.
- the diameter of the concave shape corresponding to the through hole conductor portion lower part 9 is about 10 to 200 ⁇ m, and the depth is about 3 to 100 ⁇ m.
- the concave shape corresponding to the through-hole conductor portion lower part 9 may be formed by the etching method described in FIG.
- a silicon oxide film or the like is formed on the concave inner wall corresponding to the through hole conductor portion lower portion 9 of the semiconductor wafer 1 and the entire back surface of the semiconductor wafer 1.
- the insulating film 14 at the bottom of the semiconductor element 6 is removed by a method such as photoetching.
- a through-hole conductor portion lower portion (conductor layer) 9 and a conductor layer 12 are selectively formed inside the concave shape corresponding to the through-hole conductor portion lower portion 9 and on the back surface of the semiconductor wafer 1.
- the conductor layer 12 becomes the external electrode 12, and the solder ball 13 is formed in this region.
- the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9 are electrically connected to each other, whereby the semiconductor element 6 formed with a plurality of electrode portions and the external electrode 12 are electrically connected.
- the conductor layer when the conductor layer is formed in a concave shape corresponding to the through-hole conductor portion lower portion 9 and the through-hole conductor portion upper portion 9 ′ in FIGS. 1A and 1E, it corresponds to the required amount of electricity of the semiconductor device.
- a resin or the like may be embedded to reduce the conductor layer amount and the conductor layer processing amount.
- the through-hole conductor portion upper portion 9 ′ is located immediately below the electrode portion 3, and the hole diameter A of the joint surface between the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9 is defined as the through-hole conductor portion.
- the semiconductor device semiconductor imaging device
- the semiconductor device is transferred to an electronic device substrate by making it smaller than the hole diameter B on the main surface side of the semiconductor element 61 in the upper portion 9 ′ and the hole diameter C on the other surface side of the semiconductor element 6 in the lower through-hole conductor portion 9.
- Highly reliable semiconductor device by preventing the through-hole from dropping from the semiconductor image pickup device due to the stress generated during mounting and preventing the semiconductor image pickup device and the electronic device board from causing an electrical short circuit failure. Can be provided.
- the through-hole conductor portions 9 and 9 ′ themselves are less likely to have microcracks, it is possible to provide a highly reliable semiconductor image sensor (semiconductor device) without deteriorating the electrical characteristics of the semiconductor image sensor.
- FIG. 2 is a detailed cross-sectional view of the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9 and the insulating film 14 described with reference to FIG. 1 (e) is formed by a silicon oxide film formed by plasma CVD. It can be easily performed by using a forming method or a resin forming method such as polyimide by spin coating.
- the through hole conductor portion upper portion 9 ′ is formed by plasma etching, wet etching, or the like. The insulating film 14 on the bottom surface is removed.
- the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9 are formed by using a method of forming a metal film such as Ni, Cu, or Au by electrolytic plating after depositing a Ti / Cu film or the like by sputtering or the like. .
- the thickness of the metal film is about 0.1 to 2 ⁇ m.
- dry etching or wet etching is performed so that the surface (metal film: hole diameter A) where the through hole conductor portion upper portion 9 'and the through hole conductor portion lower portion 9 are in contact can be connected with low resistance.
- the surface of the hole A portion of the through-hole conductor portion upper portion 9 ′ is thinly etched.
- the through-hole conductor part upper part 9 ′ and the through-hole conductor part lower part 9 are formed by plating.
- a method such as electrolytic plating or electroless plating is used.
- the through hole conductor portion upper portion 9 ′ has a hole diameter A ⁇ hole diameter B
- the through hole conductor portion lower portion 9 has a hole diameter A ⁇ hole diameter C
- the plating solution can easily pass through the through hole conductor portion upper portion 9 ′ and the through hole conductor. Since it penetrates also into the inside of the part lower part 9, formation of through-hole conductor part upper part 9 'and through-hole conductor part lower part 9 can be performed easily.
- the whole inside of the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9 is filled, but it is in contact with the electrode portion 3 and the external electrode (conductor layer) 12 that match the required amount of electricity of the semiconductor device.
- a resin or the like may be embedded in addition to the area (conductor layer) to reduce the conductor layer amount and the conductor layer processing amount.
- the semiconductor wafer 1 is separated into individual semiconductor devices at the cutting line 5, thereby dividing the semiconductor image pickup device into individual pieces. Separation of the semiconductor imaging device from the semiconductor wafer 1 uses a method of simultaneously cutting the optical member 7 and the semiconductor wafer 1 by a dicing method or the like.
- FIG. 3 is a detailed sectional view of the through-hole conductor portion upper portion 9 ′ and the through-hole (conductor layer) 11 portion.
- the through-hole conductor portion upper portion 9 ′ is less likely to drop off from the semiconductor image pickup device due to the stress generated when the semiconductor image pickup device is mounted on the electronic device board, and the semiconductor image pickup device and the electronic device board are electrically connected. By eliminating short circuit defects, a highly reliable semiconductor image sensor can be provided.
- the through hole (conductor layer) 11 can be drilled with a drill or the like, and etching can be performed on one side only when the through hole conductor portion upper portion 9 'is formed, thereby suppressing an increase in manufacturing cost and high reliability.
- the semiconductor image sensor can be provided.
- FIG. 4 is a representative example in the case where the conductor layer 16 is formed without forming all of the through-hole conductor portion composed of the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9 of FIG. If the conductor portion upper 9 ′ side has a hole diameter A ⁇ hole diameter B and the through hole conductor portion lower 9 side has a hole diameter A ⁇ hole diameter C, the same effect as in the case of FIGS. 2 and 3 described above is exhibited. Therefore, it is not necessary to embed all the conductor layers, the increase in manufacturing cost can be suppressed, and a highly reliable semiconductor imaging device can be provided.
- FIGS. 1 (a), (b), and (c) show the same steps as FIGS. 1 (a), (b), and (c), but shown in FIG. 5 (d).
- the through-hole conductor part lower part 9 (conductor layer) 9 of FIG. 2 is formed by drilling the through-hole 15 in advance, so that It shows that the corresponding concave shape can be easily formed, and the increase in manufacturing cost can be suppressed.
- the completed semiconductor imaging device has a structure in which the adhesive 8 has a contraction stress at least in the thickness direction, the imaging region surface of the optical member 7 and the semiconductor device 6 due to a change in ambient temperature after being incorporated in the device later. There is no change in the dimension between them, and the quality of optical properties is excellent.
- a semiconductor image pickup device which is a kind of light receiving element, has been described as an example of a semiconductor device.
- a light receiving element a photo IC or the like is also illustrated as an example, although not illustrated. Can be mentioned.
- the semiconductor device is a light receiving element such as a semiconductor imaging element or a photo IC
- the semiconductor device is a kind of light emitting element
- the planar shape is shown in FIG.
- the cross-sectional shape of the portion shown in FIG. 7A has a structure as shown in FIG. 7B, and a light emitting region HR1 is formed between the optical member 7 as a holding member and the semiconductor element 6.
- a light-emitting LED or a laser light emitting element not shown
- the through-hole conductor portion lower portion 9 and A general-purpose semiconductor device in which a Si through undercut type Si interposer that prevents the through hole conductor portion upper portion 9 'from falling off can be produced.
- FIG. 8 is a sectional view showing a structural example of a general-purpose semiconductor device using another semiconductor element instead of the optical member 7 as the semiconductor device of the present embodiment.
- This general-purpose semiconductor device includes a semiconductor element 6 in which a plurality of electrode parts (first electrode parts) 3 each having a projecting part 4 connected to one main surface, a semiconductor element 6 covering the projecting part 4 and the electrode part 3. Is a holding member joined in a state of being held via the protruding portion 4, and a plurality of different semiconductor element side electrode portions (second electrode portions) 22 are formed on one main surface, and the different semiconductor element side electrode portion 22 protrudes.
- the through-hole conductor portions (upper portion 9 ′ and lower portion 9) of the through-hole conductor portion upper portion 9 ′ increase in diameter from the inner side of the semiconductor element 6 toward one main surface side, and the lower portion of the through-hole conductor portion. 9 is such that the hole diameter increases from the inner side of the semiconductor element 6 toward the other surface side.
- the plurality of electrode portions 3 are electrically connected to the external electrodes 12 formed on the other surface of the semiconductor element 6 through the through-hole conductor portions (upper part 9 ′ and lower part 9), respectively. Is.
- the electrode portion 3 on the semiconductor element 6 and the other semiconductor element side electrode portion 22 on the other semiconductor element 21 are electrically joined via the protrusion 4.
- the protrusion 4 is a metal ball such as gold or solder.
- the electrode part 3, the protrusion part 4 and the separate semiconductor element side electrode part After the electrical connection with 22, the underfill 23 was poured into the gap between the semiconductor element 6 and the other semiconductor element 21 to improve the connection strength.
- thermosetting resin is used, and after pouring the underfill 23 into the gap between the semiconductor element 6 and another semiconductor element 21, a temperature of about 200 ° C. is used. In addition to the underfill 23, the underfill 23 was cured.
- the through-hole conductor portion upper portion 9 ′ is located immediately below the electrode portion 3, and the hole diameter of the joint surface between the through-hole conductor portion upper portion 9 ′ and the through-hole conductor portion lower portion 9.
- various functional elements such as an amplifying element, a memory element, and a microcomputer element are selected and configured as a general-purpose semiconductor element 21 according to the purpose of use.
- a flip chip type semiconductor element is used as the separate semiconductor element 21 and a stack structure is formed with the semiconductor element 6.
- the separate semiconductor element 21 may be a through-silicon type to form a phase-up connection structure.
- the underfill 23 is used to stabilize the bonding between the separate semiconductor element 21 and the semiconductor element 6.
- the underfill 23 may not be used if there is a necessary and sufficient bonding strength against the stress generated when the semiconductor device is mounted on the electronic device substrate between the separate semiconductor element 21 and the semiconductor element 6. Absent.
- the semiconductor device and the manufacturing method thereof according to the present invention reduce the time required for the manufacturing process, suppress the decrease in the yield of the semiconductor device, and are suitable for downsizing of the embedded products of the semiconductor device, and have high reliability and high mass productivity. It is possible to realize an element structure, and to reduce the cost of semiconductor devices, while further reducing the thickness and size of embedded products. This is useful in fields such as digital cameras and mobile phones.
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Abstract
Description
Claims (15)
- 1主面に突起部(4)が接続された第1電極部(3)が複数形成された半導体素子(6)と、
前記半導体素子(6)に対して前記突起部(4)と前記第1電極部(3)とを覆いかつ前記突起部(4)を介して保持された状態で接合された保持部材(7、21)とを有し、
前記半導体素子(6)の前記1主面と他方の面との間を貫通して電気接続する複数の貫通孔導体部(9’、9)が、それぞれ前記半導体素子(6)の内部側から前記1主面側に向かって孔径が大きくなるように形成され、
前記複数の第1電極部(3)が、それぞれ前記貫通孔導体部(9’、9)を通じて、前記半導体素子(6)の前記他方の面に形成された外部電極(12)と電気接続されている
ことを特徴とする半導体装置。 - 前記貫通孔導体部(9’、9)は、
前記第1電極部(3)の直下に位置しており、
前記半導体素子(6)の前記内部側から前記他方の面側に向かって前記孔径が大きくなる
ことを特徴とする請求項1記載の半導体装置。 - 前記貫通孔導体部(9’、9)は、
前記第1電極部(3)の直下に位置しており、
前記半導体素子(6)の前記内部側から前記他方の面側に向かって前記孔径が略同じである
ことを特徴とする請求項1記載の半導体装置。 - 前記保持部材(7、21)は、
前記半導体素子(6)に対して前記突起部(4)に接した状態で接着された光学部材(7)である
ことを特徴とする請求項1記載の半導体装置。 - 前記保持部材(7、21)は、
前記半導体素子(6)に対して前記突起部(4)に接した状態で接着された光学部材(7)である
ことを特徴とする請求項2記載の半導体装置。 - 前記保持部材(7、21)は、
前記半導体素子(6)に対して前記突起部(4)に接した状態で接着された光学部材(7)である
ことを特徴とする請求項3記載の半導体装置。 - 前記保持部材(7、21)は、
1主面に第2電極部(22)が複数形成され前記半導体素子(6)に対して前記第2電極部(22)を前記突起部(4)に接合した状態で電気的に接続された別半導体素子(21)である
ことを特徴とする請求項1記載の半導体装置。 - 前記保持部材(7、21)は、
1主面に第2電極部(22)が複数形成され前記半導体素子(6)に対して前記第2電極部(22)を前記突起部(4)に接合した状態で電気的に接続された別半導体素子(21)である
ことを特徴とする請求項2記載の半導体装置。 - 前記保持部材(7、21)は、
1主面に第2電極部(22)が複数形成され前記半導体素子(6)に対して前記第2電極部(22)を前記突起部(4)に接合した状態で電気的に接続された別半導体素子(21)である
ことを特徴とする請求項3記載の半導体装置。 - 半導体ウェーハ(1)内に等間隔に仮想分割して半導体素子(6)を複数個形成する工程と、
前記半導体素子(6)ごとに、その1主面上に複数の貫通孔導体部上部(9’)を、それぞれ前記半導体素子(6)の内部側から前記1主面側に向かって孔径が大きくなるように形成する工程と、
前記貫通孔導体部上部(9’)ごとに、その上面に第1電極部(3)を形成する工程と、
前記第1電極部(3)ごとに、その上面に突起部(4)を接続する工程と、
前記半導体ウェーハ(1)に対して前記突起部(4)と前記第1電極部(3)とを覆いかつ前記突起部(4)を介して保持される状態に保持部材(7、21)を接合する工程と、
前記半導体ウェーハ(1)の他方の面を研磨する工程と、
前記半導体ウェーハ(1)の前記他方の面で前記第1電極部(3)ごとに、その直下近傍に貫通孔導体部下部(9)を、前記貫通孔導体部上部(9’)と貫通し、かつ前記半導体素子(6)の前記内部側から前記他方の面側に向かって前記孔径が大きくなるように形成する工程と、
前記貫通孔導体部上部(9’)および前記貫通孔導体部下部(9)の内壁と前記半導体ウェーハ(1)の前記他方の面に絶縁膜(14)を形成する工程と、
前記貫通孔導体部上部(9’)および前記貫通孔導体部下部(9)の内壁の前記絶縁膜(14)上、および前記貫通孔導体部下部(9)の内壁に続く前記半導体ウェーハ(1)の前記他方の面の前記絶縁膜(14)上の一部に、導体層(9、9’、12)を形成することにより、前記導体層(9、9’、12)の前記半導体ウェーハ(1)の前記他方の面側を外部電極(12)として、前記導体層(9、9’、12)を通じて前記第1電極部(3)と電気接続する工程と、
前記半導体ウェーハ(1)を各半導体素子(6)ごとに分割切断することにより、半導体装置を個片化する工程とを有する
ことを特徴とする半導体装置の製造方法。 - 半導体ウェーハ(1)内に等間隔に仮想分割して半導体素子(6)を複数個形成する工程と、
前記半導体素子(6)ごとに、その1主面上に複数の貫通孔導体部上部(9’)を、それぞれ前記半導体素子(6)の内部側から前記1主面側に向かって孔径が大きくなるように形成する工程と、
前記貫通孔導体部上部(9’)ごとに、その上面に第1電極部(3)を形成する工程と、
前記第1電極部(3)ごとに、その上面に突起部(4)を接続する工程と、
前記半導体ウェーハ(1)に対して前記突起部(4)と前記第1電極部(3)とを覆いかつ前記突起部(4)を介して保持される状態に保持部材(7、21)を接合する工程と、
前記半導体ウェーハ(1)の他方の面を研磨する工程と、
前記半導体ウェーハ(1)の前記他方の面で前記第1電極部(3)ごとに、その直下近傍に貫通孔導体部下部(9)を、前記貫通孔導体部上部(9’)と貫通し、かつ前記半導体素子(6)の前記内部側から前記他方の面側に向かって前記孔径が略同じになるように形成する工程と、
前記貫通孔導体部上部(9’)および前記貫通孔導体部下部(9)の内壁と前記半導体ウェーハ(1)の前記他方の面に絶縁膜(14)を形成する工程と、
前記貫通孔導体部上部(9’)および前記貫通孔導体部下部(9)の内壁の前記絶縁膜(14)上、および前記貫通孔導体部下部(9)の内壁に続く前記半導体ウェーハ(1)の前記他方の面の前記絶縁膜(14)上の一部に、導体層(9’、11、12)を形成することにより、前記導体層(9’、11、12)の前記半導体ウェーハ(1)の前記他方の面側を外部電極(12)として、前記導体層(9’、11、12)を通じて前記第1電極部(3)と電気接続する工程と、
前記半導体ウェーハ(1)を各半導体素子(6)ごとに分割切断することにより、半導体装置を個片化する工程とを有する
ことを特徴とする半導体装置の製造方法。 - 前記保持部材(7、21)は、光学部材(7)であり、
前記半導体ウェーハ(1)に対して前記突起部(4)に接した状態に接着する
ことを特徴とする請求項10記載の半導体装置の製造方法。 - 前記保持部材(7、21)は、光学部材(7)であり、
前記半導体ウェーハ(1)に対して前記突起部(4)に接した状態に接着する
ことを特徴とする請求項11記載の半導体装置の製造方法。 - 前記保持部材(7、21)は、1主面に第2電極部(22)が複数形成された別半導体素子(21)であり、
前記半導体ウェーハ(1)に対して前記第2電極部(22)を前記突起部(4)に接合して電気的に接続する
ことを特徴とする請求項10記載の半導体装置の製造方法。 - 前記保持部材(7、21)は、1主面に第2電極部(22)が複数形成された別半導体素子(21)であり、
前記半導体ウェーハ(1)に対して前記第2電極部(22)を前記突起部(4)に接合して電気的に接続する
ことを特徴とする請求項11記載の半導体装置の製造方法。
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EP2528089A1 (en) * | 2011-05-23 | 2012-11-28 | Alchimer | Method for forming a vertical electrical connection in a layered semiconductor structure |
WO2015162918A1 (ja) * | 2014-04-25 | 2015-10-29 | ミツミ電機株式会社 | 撮像素子ユニット、撮像装置、及びカメラ付き携帯端末 |
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TW201246501A (en) * | 2011-01-27 | 2012-11-16 | Panasonic Corp | Substrate with though electrode and method for producing same |
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JP2015041691A (ja) * | 2013-08-21 | 2015-03-02 | 株式会社東芝 | 半導体装置および半導体装置の製造方法 |
CN104425396A (zh) * | 2013-09-02 | 2015-03-18 | 日月光半导体制造股份有限公司 | 半导体封装结构及其制造方法 |
CN108933153B (zh) * | 2018-07-27 | 2021-02-02 | 上海天马微电子有限公司 | 显示面板及其制作方法、显示装置 |
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