WO2018122995A1 - 薄膜キャパシタ、および半導体装置 - Google Patents
薄膜キャパシタ、および半導体装置 Download PDFInfo
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- WO2018122995A1 WO2018122995A1 PCT/JP2016/089021 JP2016089021W WO2018122995A1 WO 2018122995 A1 WO2018122995 A1 WO 2018122995A1 JP 2016089021 W JP2016089021 W JP 2016089021W WO 2018122995 A1 WO2018122995 A1 WO 2018122995A1
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- electrode
- thin film
- semiconductor device
- film capacitor
- dielectric
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- 239000003990 capacitor Substances 0.000 title claims abstract description 188
- 239000010409 thin film Substances 0.000 title claims abstract description 181
- 239000004065 semiconductor Substances 0.000 title claims abstract description 112
- 239000010408 film Substances 0.000 claims abstract description 94
- 230000001681 protective effect Effects 0.000 claims abstract description 44
- 239000010410 layer Substances 0.000 claims description 93
- 239000000853 adhesive Substances 0.000 claims description 76
- 230000001070 adhesive effect Effects 0.000 claims description 76
- 239000004020 conductor Substances 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 239000003985 ceramic capacitor Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 24
- 239000002184 metal Substances 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 17
- 239000010949 copper Substances 0.000 description 16
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 15
- 238000004528 spin coating Methods 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 229920001721 polyimide Polymers 0.000 description 8
- 239000004642 Polyimide Substances 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/08—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including only semiconductor components of a single kind
- H01L27/0805—Capacitors only
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/5222—Capacitive arrangements or effects of, or between wiring layers
- H01L23/5223—Capacitor integral with wiring layers
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Definitions
- the present invention relates to a thin film capacitor and a semiconductor device including the thin film capacitor, and more particularly to a thin film capacitor disposed in a rewiring layer of a semiconductor device including a semiconductor chip.
- Patent Document 1 discloses a thin film capacitor including an anode made of an aluminum foil (valve metal material), a dielectric film made of an anodized film, and a cathode made of a conductive polymer material. This thin film capacitor is bonded and adhered to the rewiring layer using a silver paste film (conductive adhesive material). With this configuration, a large-capacity capacitor can be mounted very close to the semiconductor integrated circuit (semiconductor chip).
- the thickness of the thin film capacitor disclosed in the above document is 0.1 mm to 0.15 mm (100 ⁇ m to 150 ⁇ m). For this reason, the thickness of the insulating film of the rewiring layer becomes greater than the thickness required for forming the rewiring, and the rewiring layer becomes thicker than necessary.
- the insulating film may be uneven due to the thickness of the thin film capacitor.
- a thin film capacitor disposed in the rewiring layer of the semiconductor device which can suppress an increase in the thickness of the insulating film of the rewiring layer and can suppress unevenness in the insulating film, And a semiconductor device.
- a thin film capacitor disclosed in this specification is a thin film capacitor disposed in a rewiring layer of a semiconductor device including a semiconductor chip, and includes a first electrode, a dielectric formed on the first electrode, and the dielectric A capacitor main body portion formed of a second electrode formed on the body, and an adhesive portion provided on the lower surface of the first electrode and used when the thin film capacitor is attached to the protective film of the semiconductor chip. And the total thickness of the capacitor main body and the adhesive portion is 20 ⁇ m or less. According to this configuration, the thickness of the thin film capacitor is 20 ⁇ m or less including the thickness of the adhesive portion.
- the total value of the thickness of the thin film capacitor is usually less than the thickness of the rewiring layer, specifically, the insulating film thickness required for forming the wiring made of plated copper on the insulating film constituting the rewiring layer. Can fit. Further, by reducing the total thickness of the thin film capacitors, it is possible to reduce the occurrence of unevenness in the insulating film when an insulating film such as polyimide is formed by spin coating. As a result, the flatness of the insulating film can be obtained.
- the thin film capacitor of this configuration even when the thin film capacitor is disposed in the rewiring layer, an increase in the thickness of the insulating film of the rewiring layer can be suppressed and unevenness occurs in the insulating film. Can be suppressed.
- a peripheral wall portion of the adhesive portion may be formed in a tapered shape that spreads downward.
- an insulating film such as polyimide
- unevenness in the insulating film can be more effectively reduced. That is, the thickness of the bonding portion is usually thicker than the thickness of each part of the capacitor main body.
- the insulating film is formed by spin coating by tapering the peripheral wall portion of the bonding portion. In this case, the film can be smoothly formed on the thin film capacitor.
- the thickness of the adhesive portion may be greater than or equal to the thickness of the capacitor main body. According to this configuration, by increasing the ratio of the thickness of the bonding portion in the thin film capacitor, the insulating film can be formed more smoothly on the thin film capacitor when the insulating film is formed by the spin coat method.
- each planar shape of the bonding portion, the first electrode, the dielectric, and the second electrode is reduced from the lowermost bonding portion toward the uppermost second electrode.
- a staircase that has a rectangular shape, and each edge of the bonding portion, the first electrode, the dielectric, and the second electrode is increased from the lowermost bonding portion toward the uppermost second electrode.
- a stepped shape may be formed. According to this configuration, when the edge of the thin film capacitor forms a stepped step, when the insulating film such as polyimide is formed on the thin film capacitor by the spin coating method, the insulating film is uneven by the edge of the thin film capacitor. Can be suppressed.
- a stress relaxation structure that relaxes the stress generated in the dielectric located at the edge of the second electrode when the thin film capacitor is attached to the protective film of the semiconductor chip by the adhesive portion. You may make it prepare.
- the stress relaxation structure can prevent the dielectric itself from being destroyed by the stress generated in the dielectric when the thin film capacitor is attached to the protective film of the semiconductor chip. That is, when a predetermined parallelism between the thin film capacitor and the semiconductor chip is not ensured when the thin film capacitor is attached on the protective film of the semiconductor chip, that is, the thin film capacitor is attached on the protective film in an inclined state.
- a force acts on the dielectric from the lower corner portion of the edge of the second electrode, and stress is generated in the dielectric by the force.
- the stress exceeds the destructive force of the dielectric, it is conceivable that the dielectric is damaged and the second electrode and the first electrode are conducted.
- the stress generated in the dielectric is relaxed by the stress relaxation structure, such damage to the dielectric is prevented.
- the stress relaxation structure is formed so as to surround the second electrode with a predetermined gap in a plan view, and an upper conductor portion electrically connected to the first electrode;
- a connection portion that is formed so as to surround the dielectric in a plan view and electrically connects the first electrode and the upper conductor portion, and the upper surface of the second electrode from the lower surface of the adhesive portion
- the height and the height of the upper surface of the upper conductor portion from the lower surface of the adhesive portion may be the same. According to this configuration, the stress relaxation structure can prevent the dielectric itself from being destroyed by the stress generated in the dielectric when the thin film capacitor is attached to the protective film of the semiconductor chip.
- the thin film capacitor is attached on the protective film of the semiconductor chip.
- the thin film capacitor can be pressed against the semiconductor chip using the upper surface of the second electrode and the upper surface of the upper conductor portion.
- the force is distributed to the connecting portion via the upper conductor portion, and the force is prevented from being concentrated on the dielectric from the lower corner portion of the edge of the second electrode. .
- the dielectric itself can be prevented from being destroyed by the stress generated in the dielectric.
- the dielectric is formed with a through groove surrounding the second electrode outside the region of the second electrode in a plan view, and the connecting portion is a conductor filling the through groove. It may be configured by. According to this configuration, since the connection portion can be formed simply by filling the through groove, the connection portion can be easily formed.
- the adhesive portion may be constituted by an adhesive sheet attached to the lower surface of the first electrode. According to this structure, since an adhesion part is used as an adhesive sheet, formation of an adhesion part can be made easy.
- a semiconductor device disclosed in this specification includes a semiconductor chip having a bonding surface on which an electrode pad including a power electrode pad is formed, a protective film formed on the bonding surface, and a protective film formed on the protective film.
- a redistribution layer including an external connection portion, a redistribution portion connecting the electrode pad and the external connection portion, and an insulating layer on which the redistribution portion is formed,
- a thin film capacitor including a capacitor main body portion that is disposed in the redistribution layer and includes a first electrode, a dielectric formed on the first electrode, and a second electrode formed on the dielectric.
- the thin film capacitor is The total thickness of the capacitor main body portion and the adhesive portion is less than the thickness of the insulating layer, and the first electrode and the second electrode of the thin film capacitor are attached to the protective film.
- the total thickness of the capacitor main body and the adhesive portion may be 20 ⁇ m or less.
- the peripheral wall portion of the bonding portion may be formed in a tapered shape extending downward.
- the thickness of the adhesive portion may be equal to or greater than the thickness of the capacitor main body.
- the planar shapes of the bonding portion, the first electrode, the dielectric, and the second electrode are reduced from the lowermost bonding portion toward the uppermost second electrode.
- a staircase that has a rectangular shape, and each edge of the bonding portion, the first electrode, the dielectric, and the second electrode is increased from the lowermost bonding portion toward the uppermost second electrode.
- a stepped shape may be formed.
- a stress relaxation structure that relaxes stress generated in the dielectric located at an edge of the second electrode when the thin film capacitor is attached to the protective film of the semiconductor chip by the adhesive portion. It may be included.
- the stress relaxation structure is formed so as to surround the second electrode with a predetermined gap in a plan view, and an upper conductor portion electrically connected to the first electrode;
- a connection portion that is formed so as to surround the dielectric in a plan view and electrically connects the first electrode and the upper conductor portion, and the upper surface of the second electrode from the lower surface of the adhesive portion You may make it the height and the height from the lower surface of the said adhesion part of the upper surface of the said upper conductor part equal.
- a through groove surrounding the second electrode is formed outside the second electrode region in a plan view in the dielectric, and the connecting portion is a conductor filling the through groove. It may be configured by.
- the rewiring layer is a multi-layer rewiring layer including a multi-layer rewiring section, and the multi-layer rewiring section includes a fan-out wiring that increases an arrangement pitch of the electrode pads,
- the first electrode and the second electrode may be connected to the external connection portion by the fan-out wiring.
- a fan-out wafer level package (FOWLP) semiconductor device can be constructed as a semiconductor device including a thin film capacitor in a redistribution layer.
- the semiconductor device may further include the thin film capacitor disposed in a region of the redistribution layer located outside the region corresponding to the semiconductor chip in plan view. According to this configuration, the total capacity as a decoupling capacitor can be increased in the FOWLP semiconductor device.
- the semiconductor device may further include a multilayer ceramic capacitor connected to the thin film capacitor disposed in the region of the redistribution layer on the surface of the redistribution layer. According to this configuration, in the FOWLP semiconductor device, the total capacity as a decoupling capacitor can be further increased as necessary.
- the adhesive portion may be an adhesive sheet attached to the lower surface of the first electrode.
- an adhesive layer provided on the protective film may be provided as the adhesive portion.
- the present invention even when the thin film capacitor is disposed in the rewiring layer, an increase in the thickness of the insulating film of the rewiring layer can be suppressed, and the occurrence of unevenness in the insulating film can be suppressed. it can.
- FIG. 1 is a schematic cross-sectional view of a semiconductor device according to a first embodiment.
- Schematic cross-sectional view showing each manufacturing process of the thin film capacitor according to Embodiment 1 Schematic sectional view showing each manufacturing process of the thin film capacitor following FIG.
- Schematic sectional view of a thin film capacitor according to Embodiment 2 Schematic plan view of thin film capacitor
- Schematic sectional view showing each manufacturing process of a thin film capacitor according to Embodiment 2 Schematic sectional view showing each manufacturing process of the thin film capacitor following FIG.
- Schematic sectional view showing another method for manufacturing a thin film capacitor according to Embodiment 2 Schematic sectional view showing another example of a thin film capacitor according to Embodiment 2
- Schematic sectional view showing another example semiconductor device Schematic sectional view showing another example semiconductor device
- a semiconductor device 100 is a so-called wafer level package (WLP) semiconductor device, and mainly includes a redistribution layer 10 and an LSI chip (an example of a “semiconductor chip”) 50. And including.
- FIG. 1 is a cross-sectional view of the semiconductor device 100 corresponding to the position indicated by the one-dot chain line AA in FIG.
- a plurality of electrode pads 51 are formed on the bonding surface 50 ⁇ / b> S which is the surface on the bonding side of the LSI chip 50.
- the electrode pad 51 includes power electrode pads 51 ⁇ / b> G and 51 ⁇ / b> V for supplying power to the LSI chip 50.
- a power supply voltage Vdd is applied to the power supply electrode pad 51V via the redistribution layer 10
- a ground voltage Vg is applied to the power supply electrode pad 51G.
- the subscript “V” indicates a member to which the power supply voltage Vdd is applied
- the subscript “G” indicates a member to which the ground voltage Vg is applied.
- a protective film 52 is formed on the bonding surface 50S, specifically, on the bonding surface 50S except for the electrode pad 51.
- a rewiring layer 10 is formed on the protective film 52.
- the protective film 52 is a nitride film such as a SiN film, for example.
- the rewiring layer 10 includes two insulating layers (11A and 11B) stacked.
- the two insulating layers (11A, 11B) are made of, for example, a polyimide resin that is cured after being applied by a spin coating method.
- the thin film capacitor 20 is disposed in the first insulating layer (stress buffer coat layer) 11A of the first layer close to the bonding surface 50S.
- the first insulating layer 11A is an example of an “insulating layer”.
- the second insulating layer (rewiring cover coat layer) 11B of the second layer is provided with an external connection pad 13 and a solder ball 14 connected to the external connection pad 13.
- the semiconductor device 100 is connected to a substrate BD such as a mother board by the solder balls 14.
- the external connection pads 13 and the solder balls 14 are examples of external connection portions.
- the rewiring layer 10 has a rewiring portion 12 that connects the electrode pad 51 and the external connection pad 13.
- the rewiring unit 12 is made of, for example, plated copper.
- a first electrode 21 ⁇ / b> A and a second electrode 21 ⁇ / b> C of the thin film capacitor 20 to be described later are connected to the electrode pad 51 and to the external connection pad 13 by the rewiring unit 12. Yes.
- the first electrode 21A is connected to the power supply electrode pad 51V and to the external connection pad 13V by the rewiring part 12V.
- the second electrode 21C is connected to the power supply electrode pad 51G and also connected to the external connection pad 13G by the rewiring part 12G.
- the polarity of the first electrode 21A is a positive electrode
- the polarity of the second electrode 21c is a negative electrode.
- the polarities of the first electrode 21A and the second electrode 21C are not limited to this, and may be reversed.
- the thin film capacitor 20 is a capacitor disposed in the rewiring layer 10 of the semiconductor device 100 including the LSI chip 50, as shown in FIG.
- the thin film capacitor 20 includes a capacitor main body 21 and an adhesive sheet 22.
- the adhesive sheet 22 is, for example, a die attach film (DAF).
- DAF die attach film
- the adhesive sheet 22 is an example of an adhesive part.
- the capacitor main body 21 includes a first electrode 21A, a dielectric 21B formed on the first electrode 21A, and a second electrode 21C formed on the dielectric 21B.
- the adhesive sheet 22 is provided by being attached to the lower surface of the first electrode 21 ⁇ / b> A, and is used when the thin film capacitor 20 is attached to the protective film 52 of the LSI chip 50.
- the bonding portion is not limited to the adhesive sheet 22 attached to the lower surface of the first electrode 21A, and may be, for example, an adhesive applied to the lower surface of the first electrode 21A.
- the total thickness of the capacitor body 21 and the adhesive sheet 22, that is, the thickness of the thin film capacitor 20, is less than the thickness of the first insulating layer 11A, and preferably 20 ⁇ m or less.
- the thickness of the thin film capacitor 20 is 20 ⁇ m or less.
- the thickness of the first electrode 21A is 2 ⁇ m or less
- the thickness of the dielectric 21B is 1 ⁇ m or less
- the thickness of the second electrode 21C is 2 ⁇ m or less.
- the thickness of the adhesive sheet 22 is 5 ⁇ m or more and 10 ⁇ m or less.
- the peripheral wall part 22W of an adhesive sheet is formed in the taper shape which spreads below.
- an STO (strontium titanate) film 21MB is formed on the surface of a dry-cleaned substrate 41 by, for example, an AS (aerosol) CVD method. To do.
- the thickness of the STO film 21MB is a value between 0.1 ⁇ m and 0.4 ⁇ m, for example.
- the STO film 21MB becomes the dielectric 21B of the thin film capacitor 20.
- the base material 41 is comprised with the aluminum foil in this embodiment.
- the metal foil as the base material is not limited to the aluminum foil, and may be a metal foil such as copper or nickel. Further, the dielectric is not limited to the STO film 21MB.
- a metal thin film 21MA to be the first electrode 21A of the thin film capacitor 20 is formed on the STO film 21MB.
- the metal thin film 21MA is made of, for example, a Cu (copper) thin film.
- the Cu thin film is formed by, for example, a vapor deposition method.
- the film thickness of the metal thin film 21MA is, for example, 2 ⁇ m or less.
- an adhesive sheet 22 with a protective film 23 is pasted onto the metal thin film 21MA.
- the aluminum base material 41 is removed by, for example, etching, and the surface of the STO film 21MB opposite to the surface on which the metal thin film 21MA is formed is exposed.
- the top and bottom of FIG. 2C are reversed.
- a metal thin film 21MC to be the second electrode 21C of the thin film capacitor 20 is formed on the exposed STO film 21MB.
- the metal thin film 21MC is composed of, for example, a Cu (copper) thin film, like the first electrode 21A.
- the Cu thin film is formed by, for example, a vapor deposition method.
- the film thickness of the metal thin film 21MC is, for example, 2 ⁇ m or less.
- the metal thin film 21MC is patterned to form the second electrode 21C.
- the planar shape of the second electrode 21 ⁇ / b> C is a rectangular shape, which is almost square (see FIG. 4A).
- a through hole 25 reaching the metal thin film 21MA is formed in the STO film 21MB using, for example, a laser.
- a groove 44 for individualizing the thin film capacitor 20 is formed in the vicinity of the through hole 25 using a laser.
- the groove 44 is formed so as to surround the second electrode 21C (see FIG. 4A), and the depth of the groove 44 reaches the inside of the protective film 23 as shown in FIG.
- the metal thin film 21MA and the STO film 21MB are patterned to form the first electrode 21A and the dielectric 21B.
- the thin film capacitor 20 is formed. Specifically, a thin film capacitor sheet 20S as shown in FIG. 4A is formed.
- the thin film capacitors 20 with the protective film 23 are individually separated from the thin film capacitor sheet 20S shown in FIG. 4 (a) (see FIG. 4 (b)).
- the protective film 23 of the separated thin film capacitor 20 is peeled off, and the thin film capacitor 20 is pasted on the protective film 52 of the LSI chip 50A after the pre-process of manufacturing the semiconductor chip and before dicing (FIG. 4C). reference).
- the rewiring layer 10 is formed on the protective film 52 to which the thin film capacitor 20 is attached by a known method.
- the first insulating layer 11A is formed by, eg, spin coating.
- via holes (15A to 15D) for connecting the first electrode 21A and the second electrode 21C of the thin film capacitor 20 to the power electrode pad 51 by the rewiring unit 12 are formed.
- the rewiring portion 12 is formed on the inner wall of the via hole (15A to 15D) and the first insulating layer 11A by using, for example, plated copper.
- the second insulating layer 11B is formed on the first insulating layer 11A on which the rewiring portion 12 is formed and in the via holes (15A to 15D) by, for example, a spin coating method.
- via holes (16A and 16B) for connecting the first electrode 21A and the second electrode 21C of the thin film capacitor 20 to the external connection pad 13 by the rewiring portion 12 are formed.
- the external connection pads 13 are formed on the inner walls of the via holes (16 ⁇ / b> A and 16 ⁇ / b> B) with a metal having good solder wettability, and the solder balls 14 are formed on the external connection pads 13.
- individual semiconductor devices 100 are formed by dicing the semiconductor wafer 70.
- the external connection pad 13 is preferably so-called under bump metal (UBM).
- the thickness of the thin film capacitor 20 is 20 ⁇ m or less including the thickness of the adhesive sheet 22. Therefore, the total thickness value of the thin film capacitor 20 is usually required to form the rewiring portion 12 made of plated copper on the rewiring layer 10, specifically, the first insulating layer 11 ⁇ / b> A constituting the rewiring layer 10.
- the thickness can be less than the thickness of the first insulating layer 11A. Further, by reducing the total thickness of the thin film capacitor 20, it is possible to reduce the occurrence of unevenness in the first insulating layer 11A when the first insulating layer 11A such as polyimide is formed by spin coating. Can do. As a result, the flatness of the first insulating layer 11A is obtained.
- an increase in the thickness of the first insulating layer 11A of the rewiring layer 10 can be suppressed even when the thin film capacitor 20 is disposed in the rewiring layer 10, and The occurrence of unevenness in the first insulating layer 11A can be suppressed.
- the peripheral wall portion 22W of the adhesive sheet 22 is formed in a tapered shape that spreads downward. Therefore, when the first insulating layer 11A such as polyimide is formed by spin coating, it is possible to more effectively suppress the occurrence of unevenness in the first insulating layer 11A. That is, the thickness of the adhesive sheet 22 is usually thicker than the thickness of the capacitor body 21. In this case, the peripheral wall portion 22W of the adhesive sheet is tapered to spin the first insulating layer 11A. When the film is formed by the coating method, the first insulating layer 11A can be smoothly formed on the thin film capacitor 20.
- the first insulating layer 11A such as polyimide
- the thin film capacitor 20 can be provided in the vicinity of the LSI chip 50. Therefore, the inductance due to the wiring between the LSI chip 50 and the thin film capacitor 20 can be reduced, and a suitable high frequency characteristic as a decoupling capacitor can be obtained.
- each planar shape of the adhesive sheet 22, the first electrode 21A, the dielectric 21B, and the second electrode 21C has a rectangular shape that decreases from the lowermost adhesive sheet 22 toward the uppermost second electrode 21C.
- each edge part of the adhesive sheet 22, the 1st electrode 21A, the dielectric 21B, and the 2nd electrode 21C is directed from the lowermost adhesive sheet 22 to the uppermost second electrode 21C.
- a stepped step that becomes higher may be formed.
- the edge portion of the thin film capacitor 20 forms a stepped step, and the first insulating layer 11A such as polyimide is manufactured on the thin film capacitor 20 attached on the protective film 52 of the LSI chip 50 by a spin coat method.
- the unevenness of the first insulating layer 11A caused by the end portion of the thin film capacitor 20 can be further suppressed.
- the peripheral wall portion 22W of the adhesive sheet may not be tapered.
- such a step is smoothed by using a laser beam having a Gaussian beam shape GD intensity distribution when the thin film capacitor 20 is separated from the thin film capacitor sheet 20S. Can do.
- Embodiment 2 will be described with reference to FIGS. Only the configuration of the thin film capacitor 20A is different from the first embodiment. Therefore, only the thin film capacitor 20A will be described.
- symbol is attached
- the thin film capacitor 20A of the second embodiment includes a stress relaxation structure 30 as shown in FIG.
- the stress relaxation structure 30 relaxes the stress generated in the dielectric 21 ⁇ / b> B located at the edge of the second electrode 21 ⁇ / b> C when the thin film capacitor 20 ⁇ / b> A is attached to the protective film 52 of the LSI chip 50 by the adhesive sheet 22.
- the stress relaxation structure 30 includes an upper conductor portion 31 and a connection portion 32.
- the upper conductor portion 31 is formed so as to surround the second electrode 21C with a predetermined gap in plan view (see FIG. 7), and is electrically connected to the first electrode 21A via the connection portion 32.
- the connection part 32 is formed so as to surround the dielectric 21 ⁇ / b> B in a plan view, and electrically connects the first electrode 21 ⁇ / b> A and the upper conductor part 31.
- the upper conductor portion 31 serves as a connection electrode to the power electrode pad 51V and the external connection pad 13V of the first electrode 21A.
- the height H1 of the upper surface 21F of the second electrode 21C from the lower surface 22F of the adhesive sheet is equal to the height H2 of the upper surface 31F of the upper conductor portion 31 from the lower surface 22F of the adhesive sheet (see FIG. 6).
- the dielectric 21B is formed with a through groove 33 that surrounds the second electrode outside the region of the second electrode 21C in plan view, and the connecting portion 32 is formed of a conductor that fills the through groove 33. . Therefore, since the connection part 32 can be formed simply by filling the through groove 33, the connection part 32 can be easily formed.
- the through-groove 33 is formed by patterning the STO film 21MB formed on the surface of the substrate 41.
- a metal thin film 21MA to be the first electrode 21A of the thin film capacitor 20 is formed on the STO film 21MB.
- the metal thin film 21MA is made of, for example, a Cu (copper) thin film.
- the through groove 33 is filled with the Cu thin film, and the connection portion 32 is formed.
- FIG. 8C a support 47 with an adhesive layer 46 is attached onto the metal thin film 21MA.
- This support body 47 is frame-shaped here.
- the aluminum base material 41 is removed by, for example, etching, and the surface of the STO film 21MB opposite to the surface on which the metal thin film 21MA is formed is exposed.
- FIG.8 (d) reverses the upper and lower sides of FIG.8 (c).
- a metal thin film 21 MC to be the second electrode 21 C of the thin film capacitor 20 is formed on the exposed STO film 21 MB and the connection portion 32.
- the metal thin film 21MC is composed of, for example, a Cu (copper) thin film, like the first electrode 21A.
- the metal thin film 21MC is patterned to form the second electrode 21C and the upper conductor portion 31 (see FIG. 7).
- the support 47 is removed, and the adhesive sheet 22 with the protective film 23 supported by another support 48 is attached to the metal thin film 21MA.
- a groove 44A for individualizing the thin film capacitor 20 is formed using a laser.
- the groove 44A is formed so as to surround the upper conductor portion 31, and the depth of the groove 44A reaches the inside of the support 48 as shown in FIG. 9 (h).
- the metal thin film 21MA and the STO film 21MB are patterned to form the first electrode 21A, the dielectric 21B, and the upper conductor portion 31 (stress relaxation structure 30). Thereby, the thin film capacitor 20A is formed.
- the configuration of the stress relaxation structure 30 is not limited to that shown in FIG.
- the stress relaxation structure 30A of the thin film capacitor 20B shown in FIG. 11 may be used. Similar to the stress relaxation structure 30, the stress relaxation structure 30 ⁇ / b> A includes an upper conductor portion 31 ⁇ / b> A and a connection portion 32 ⁇ / b> A. However, as shown in FIG.
- the stress relaxation structure 30 ⁇ / b> A is different from the stress relaxation structure 30 in that there is no through groove 33 surrounding the second electrode. That is, in the stress relaxation structure 30A, the connection portion 32A reaches the outer peripheral portion of the capacitor main body portion 21, and it is not necessary to form the through groove 33 for forming the connection portion 32A.
- the dielectric 21B When the stress exceeds the destructive force of the dielectric 21B, the dielectric 21B may be damaged, and the second electrode 21C and the first electrode 21A may be conducted. However, since the stress generated in the dielectric 21B is relieved by the stress relaxation structure 30, such damage to the dielectric 21B is prevented.
- the height H1 of the upper surface 21F of the second electrode from the lower surface 22F of the adhesive sheet is equal to the height H2 of the upper surface 31F of the upper conductor portion 31 from the lower surface 22F of the adhesive sheet.
- the thickness of the adhesive sheet 22 having the tapered peripheral wall portion 22 ⁇ / b> W may be equal to or greater than the thickness of the capacitor main body portion 21.
- the first insulating film 11A of the rewiring layer 10 is formed by spin coating, the first insulating layer 11A is formed on the thin film capacitor. A film can be formed smoothly.
- the adhesive portion for attaching the thin film capacitor 20 on the protective film 52 in the semiconductor device 100 is constituted by the adhesive sheet 22 attached to the lower surface of the first electrode 21A of the thin film capacitor 20.
- the adhesive portion may be configured by an adhesive layer provided on the protective film 52 of the LSI chip 50. That is, for example, an adhesive or adhesive resin may be applied as an adhesive layer on the semiconductor chip side, and only the capacitor main body 21 may be directly disposed on the LSI chip 50.
- the adhesive portion may be provided on the surface of the first electrode 21A opposite to the surface on which the dielectric is formed, or may be provided on the protective film 52 of the LSI chip 50.
- the configuration of the semiconductor device is not limited to the configuration of the semiconductor device 100 shown in FIG.
- the redistribution layer is a multilayer redistribution layer (10, 10A) including multilayer redistribution portions (12A, 12B, 12C).
- the section includes fan-out wiring (12A, 12B, 12C) that expands the arrangement pitch of the electrode pads 51, and the first electrode 21A and the second electrode 21C are connected to the external connection section by fan-out wiring.
- a fan-out wafer level package (FOWLP) semiconductor device can be constructed as a semiconductor device having a thin film capacitor in the redistribution layer.
- FOWLP fan-out wafer level package
- the multilayer rewiring layer (10, 10A) includes an example including four insulating layers (11A, 11B, 11C, 11D) and three rewiring portions (12A, 12B, 12C) in FIG.
- the configuration of the multilayer rewiring layer is not limited to this.
- the structure further includes a thin film capacitor 20A arranged in the region of the redistribution layer located outside the region corresponding to the semiconductor chip in plan view. It may be.
- the total capacity as a decoupling capacitor can be increased.
- the multilayer ceramic capacitor 60 connected to the thin film capacitor 20A disposed in the region of the redistribution layer is further provided on the surface 10S of the redistribution layer. May be.
- the total capacity as a decoupling capacitor can be further increased as necessary.
- SYMBOLS 10 ... Rewiring layer, 11A ... 1st insulating layer, 11B ... 2nd insulating layer, 12 ... Rewiring part, 12A, 12B, 12C ... Fan-out wiring (rewiring part), 13 ... External connection pad (External connection part) ), 14... Solder balls (external connection portions), 20 and 20A.
- 20B ... Thin film capacitor, 21 ... Capacitor main body, 21A ... First electrode, 21B ... Dielectric, 21C ... Second electrode, 22 ... Adhesive sheet (adhesive part), 22W ... Peripheral wall part of adhesive sheet, 30, 30A ... Stress relaxation structure 31, 31A ...
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Abstract
Description
本構成によれば、薄膜キャパシタの厚みは、接着部の厚みを含めて20μm以下とされる。そのため、薄膜キャパシタの厚さの総計値を、通常、再配線層、詳しくは、再配線層を構成する絶縁膜上にメッキ銅による配線を形成するに必要とされる絶縁膜の厚さ未満に収めることができる。また、薄膜キャパシタの厚さの総計値を小さくすることによって、ポリイミド等の絶縁膜をスピンコート法によって製膜する際に、絶縁膜にムラが生じることを低減させることができる。その結果、絶縁膜の平坦性が得られる。すなわち、本構成の薄膜キャパシタによれば、薄膜キャパシタが再配線層に配置される場合であっても、再配線層の絶縁膜の厚さの増加を抑制できるとともに、絶縁膜にムラが生じることを抑制することができる。
本構成によれば、ポリイミド等の絶縁膜をスピンコート法によって製膜する際に、絶縁膜にムラが生じることをより効果的に低減させることができる。すなわち、接着部の厚みは、通常、キャパシタ本体部各部の厚みより厚くなる場合が多く、その場合において、接着部の周辺壁部をテーパ状とすることによって、絶縁膜をスピンコート法によって製膜する際に、薄膜キャパシタ上に滑らかに製膜することができる。
本構成によれば、薄膜キャパシタにおける接着部の厚みの割合を増加させることによって、絶縁膜をスピンコート法によって製膜する際に、薄膜キャパシタ上により滑らかに製膜することができる。
本構成によれば、薄膜キャパシタの縁部が階段状の段差を成すことにより、薄膜キャパシタにポリイミド等の絶縁膜をスピンコート法によって製膜する際に、薄膜キャパシタの縁部によって絶縁膜のムラが生じることを抑制できる。
本構成によれば、応力緩和構造によって、薄膜キャパシタを半導体チップの保護膜上に貼りつける際に、誘電体に生じる応力によって誘電体自体が破壊されることを防止できる。すなわち、薄膜キャパシタを半導体チップの保護膜上に貼りつける際に、薄膜キャパシタと半導体チップとの所定の平行度が確保されない場合、すなわち、薄膜キャパシタが傾いた状態で保護膜上に貼りつけされる場合、第2電極の縁部の下角部から誘電体に集中して力が働き、その力によって誘電体に応力が生じる。その応力が誘電体の破壊力を上回った場合、誘電体が破損し、第2電極と第1電極とが導通することが考えられる。しかしながら、応力緩和構造によって誘電体に生じる応力が緩和されるため、そのような誘電体の破損が防止される。
本構成によれば、応力緩和構造によって、薄膜キャパシタを半導体チップの保護膜上に貼りつける際に、誘電体に生じる応力によって誘電体自体が破壊されることを防止できる。すなわち、第2電極の上面の接着部の下面からの高さと、上部導体部の上面の接着部の下面からの高さとは等しくされているため、薄膜キャパシタを半導体チップの保護膜上に貼りつける際に、第2電極の上面と上部導体部の上面とを利用して薄膜キャパシタを半導体チップに対して押さえつけることができる。それによって、薄膜キャパシタが傾いたとしても、力が上部導体部を介して接続部にも分散され、第2電極の縁部の下角部から誘電体に集中して力が働くことが防止される。その結果、誘電体に生じる応力によって誘電体自体が破壊されることを防止できる。
本構成によれば、接続部は、単に貫通溝を埋めることによって形成できるため、接続部の形成を容易にできる。
本構成によれば、接着部は接着シートとされるため、接着部の形成を容易にできる。
本構成によれば、再配線層に薄膜キャパシタを備える半導体装置において、再配線層の絶縁膜の厚さの増加を抑制できるとともに、絶縁膜にムラが生じることを抑制することができる。その際、半導体チップの間近に薄膜キャパシタを備えることができるため、さらに、配線によるインダクタンスを低減させることができ、デカップリングキャパシタとしての好適な高周波特性を得ることができる。
本構成によれば、再配線層に薄膜キャパシタを備える半導体装置として、ファンアウト・ウェハレベルパッケージ(FOWLP)の半導体装置を構築することができる。
本構成によれば、FOWLPの半導体装置において、デカップリングキャパシタとしての総容量を増加させることができる。
本構成によれば、FOWLPの半導体装置において、必要に応じて、デカップリングキャパシタとしての総容量をさらに増加させることができる。
実施形態1を図1から図5を参照して説明する。なお、図中、同一の符号は、同一又は相当部分を示す。
図1に示されるように、半導体装置100は、いわゆる、ウェハレベルパッケージ(WLP)の半導体装置であり、大きくは、再配線層10とLSIチップ(「半導体チップ」の一例)50と、を含む。なお、図1は、図4(b)の一点鎖線A-Aで示される位置に対応した半導体装置100の断面図である。
薄膜キャパシタ20は、図1に示されるように、LSIチップ50を含む半導体装置100の再配線層10に配置されるキャパシタである。薄膜キャパシタ20は、キャパシタ本体部21と接着シート22とを含む。接着シート22は、例えば、ダイ・アタッチ・フィルム(DAF)である。接着シート22は接着部の一例である。
また、図1等に示されるように、接着シートの周辺壁部22Wは、下方に向って広がるテーパ状に形成されている。
2-1.薄膜キャパシタの製造方法
まず、図2および図3を参照して、薄膜キャパシタ20の製造方法の一例を説明する。なお、薄膜キャパシタ20は、図4(a)に示される複数の薄膜キャパシタ20が形成された薄膜キャパシタシート20Sから切り離されて個別化されて形成されるが、以下の説明では、個別の薄膜キャパシタ20として説明する。また、図2および図3に示される製造工程は、単に一例を示すものであり、これに限定されるものではない。
続いて、図1および図4を参照して、半導体装置100の製造方法の概要を説明する。
薄膜キャパシタ20の厚みは、接着シート22の厚みを含めて20μm以下とされる。そのため、薄膜キャパシタ20の厚さの総計値を、通常、再配線層10、詳しくは、再配線層10を構成する第1絶縁層11A上にメッキ銅による再配線部12を形成するに必要とされる第1絶縁層11Aの厚さ未満に収めることができる。また、薄膜キャパシタ20の厚さの総計値を小さくすることによって、ポリイミド等の第1絶縁層11Aをスピンコート法によって製膜する際に、第1絶縁層11Aにムラが生じることを低減させることができる。その結果、第1絶縁層11Aの平坦性が得られる。すなわち、実施形態1の薄膜キャパシタ20によれば、再配線層10に配置される場合であっても、再配線層10の第1絶縁層11Aの厚さの増加を抑制することができるとともに、第1絶縁層11Aにムラが生じることを抑制することができる。
次に、図6から図11を参照して、実施形態2を説明する。実施形態1とは、薄膜キャパシタ20Aの構成のみが異なる。そのため、薄膜キャパシタ20Aについてのみ説明する。なお、実施形態1と同一の構成については同一の符号を付し、その説明を省略する。
次に、図8から図10を参照して、実施形態2の薄膜キャパシタ20Aの製造方法を説明する。
また、応力緩和構造30の構成も図6に示されたものに限られない。例えば、図11に示される薄膜キャパシタ20Bの応力緩和構造30Aであってもよい。応力緩和構造30Aは、応力緩和構造30と同様に、上部導体部31Aと、接続部32Aと、を含む。しかしながら、図11に示されるように、応力緩和構造30Aでは第2電極を囲む貫通溝33がない点が、応力緩和構造30と異なる。すなわち、応力緩和構造30Aでは、キャパシタ本体部21の外周部まで接続部32Aが達する構成であり、接続部32Aを形成するための貫通溝33の形成が不要となる。
本構成によれば、応力緩和構造30によって、薄膜キャパシタ20Aを半導体チップの保護膜52上に貼りつける際に、誘電体21Bに生じる応力によって誘電体21B自体が破壊されることを防止できる。すなわち、薄膜キャパシタ20Aを半導体チップの保護膜52上に貼りつける際に、薄膜キャパシタ20AとLSIチップ50との所定の平行度が確保されない場合、すなわち、薄膜キャパシタ20Aが傾いた状態で保護膜52上に貼りつけされる場合、第2電極21Cの下方の縁部の角部から誘電体21Bに集中して力が働き、その力によって誘電体21Bに応力が生じる。その応力が誘電体21Bの破壊力を上回った場合、誘電体21Bが破損し、第2電極21Cと第1電極21Aとが導通することが考えられる。しかしながら、応力緩和構造30によって誘電体21Bに生じる応力が緩和されるため、そのような誘電体21Bの破損が防止される。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記実施形態において、テーパ状の周辺壁部22Wを有する接着シート22の厚みが、キャパシタ本体部21の厚み以上であるようにしてもよい。
この場合、薄膜キャパシタにおける接着シート22の厚みの割合を増加させることによって、再配線層10の第1絶縁膜11Aをスピンコート法によって製膜する際に、第1絶縁層11Aを薄膜キャパシタ上により滑らかに製膜することができる。
この場合、再配線層に薄膜キャパシタを備える半導体装置として、ファンアウト・ウェハレベルパッケージ(FOWLP)の半導体装置を構築することができる。なお、多層再配線層(10、10A)は、図12には、四層の絶縁層(11A、11B、11C、11D)と、三層の再配線部(12A,12B、12C)を含む例が、示されるが、多層再配線層の構成は、これに限られない。
この場合、FOWLPの半導体装置において、デカップリングキャパシタとしての総容量を増加させることができる。
この場合、FOWLPの半導体装置において、必要に応じて、デカップリングキャパシタとしての総容量をさらに増加させることができる。
Claims (21)
- 半導体チップを含む半導体装置の再配線層に配置される薄膜キャパシタであって、
第1電極、前記第1電極上に形成された誘電体、および前記誘電体上に形成された第2電極からなるキャパシタ本体部と、
前記第1電極の下面に設けられ、当該薄膜キャパシタを前記半導体チップの保護膜上に貼りつける際に使用される接着部と、
を備え、
前記キャパシタ本体部と前記接着部との厚みの総計が20μm以下である、薄膜キャパシタ。 - 請求項1に記載の薄膜キャパシタにおいて、
前記接着部の周辺壁部は、下方に向って広がるテーパ状に形成されている、薄膜キャパシタ。 - 請求項2に記載の薄膜キャパシタにおいて、
前記接着部の厚みが、前記キャパシタ本体部の厚み以上である、薄膜キャパシタ。 - 請求項1から請求項3のいずれか一項に記載の薄膜キャパシタにおいて、
前記接着部、前記第1電極、前記誘電体、および前記第2電極の各平面形状は、最下段の前記接着部から最上段の前記第2電極に向けて小さくなる矩形状を成し、
前記接着部、前記第1電極、前記誘電体、および前記第2電極の各縁部は、最下段の前記接着部から最上段の前記第2電極に向けて高くなる階段状の段差を形成している、薄膜キャパシタ。 - 請求項1から請求項3のいずれか一項に記載の薄膜キャパシタにおいて、
前記接着部によって当該薄膜キャパシタを前記半導体チップの保護膜上に貼りつける際に前記第2電極の縁部に位置する前記誘電体に生じる応力を緩和させる応力緩和構造を備える、薄膜キャパシタ。 - 請求項5に記載の薄膜キャパシタにおいて、
前記応力緩和構造は、
平面視において前記第2電極を、所定の間隙を隔てて囲むように形成され、前記第1電極と電気的に接続される上部導体部と、
平面視において前記誘電体を囲むように形成され、前記第1電極と前記上部導体部とを電気的に接続する接続部と、を含み、
前記第2電極の上面の前記接着部の下面からの高さと、前記上部導体部の上面の前記接着部の下面からの高さとは等しい、薄膜キャパシタ。 - 請求項6に記載の薄膜キャパシタにおいて、
前記誘電体には、平面視において前記第2電極の領域の外側において前記第2電極を囲む貫通溝が形成されており、
前記接続部は、前記貫通溝を埋める導体によって構成されている、薄膜キャパシタ。 - 請求項1から請求項7のいずれか一項に記載の薄膜キャパシタにおいて、
前記接着部は、前記第1電極の下面に貼り付けられた接着シートである、薄膜キャパシタ。 - 電源電極パッドを含む電極パッドが形成されたボンディング面を有する半導体チップと、
前記ボンディング面上に形成された保護膜と、
前記保護膜上に形成された再配線層であって、外部接続部、および前記電極パッドと前記外部接続部とを接続する再配線部と、前記再配線部が形成される絶縁層と、を含む再配線層と、
前記再配線層内に配置された、第1電極と、前記第1電極上に形成された誘電体と、前記誘電体上に形成された第2電極とからなるキャパシタ本体部を含む、薄膜キャパシタと、
前記第1電極の、前記誘電体が形成された面とは反対側の面上に設けられた、または、前記半導体チップの保護膜上に設けられた、接着部と、
を備え、
前記薄膜キャパシタは、前記接着部によって前記保護膜に貼り付けられており、
前記キャパシタ本体部と、前記接着部との厚みの総計が、前記絶縁層の厚さ未満であり、
前記薄膜キャパシタの前記第1電極および前記第2電極は、前記再配線部によって、前記電源電極パッドに接続されるとともに、前記外部接続部に接続されている、半導体装置。 - 請求項9に記載の半導体装置において、
前記キャパシタ本体部と、前記接着部との厚みの総計が20μm以下である、半導体装置。 - 請求項9または請求項10に記載の半導体装置において、
前記接着部の周辺壁部は、下方に向って広がるテーパ状に形成されている、半導体装置。 - 請求項11に記載の半導体装置において、
前記接着部の厚みが、前記キャパシタ本体部の厚み以上である、半導体装置。 - 請求項9から請求項12のいずれか一項に記載の半導体装置において、
前記接着部、前記第1電極、前記誘電体、および前記第2電極の各平面形状は、最下段の前記接着部から最上段の前記第2電極に向けて小さくなる矩形状を成し、
前記接着部、前記第1電極、前記誘電体、および前記第2電極の各縁部は、最下段の前記接着部から最上段の前記第2電極に向けて高くなる階段状の段差を形成している、半導体装置。 - 請求項9から請求項12のいずれか一項に記載の半導体装置において、
前記薄膜キャパシタは、前記接着部によって前記薄膜キャパシタを前記半導体チップの保護膜上に貼りつける際に前記第2電極の縁部に位置する前記誘電体に生じる応力を緩和させる応力緩和構造を含む、半導体装置。 - 請求項14に記載の半導体装置において、
前記応力緩和構造は、
平面視において前記第2電極を、所定の間隙を隔てて囲むように形成され、前記第1電極と電気的に接続される上部導体部と、
平面視において前記誘電体を囲むように形成され、前記第1電極と前記上部導体部とを電気的に接続する接続部と、を含み、
前記第2電極の上面の前記接着部の下面からの高さと、前記上部導体部の上面の前記接着部の下面からの高さとは等しい、半導体装置。 - 請求項15に記載の半導体装置において、
前記誘電体には、平面視において前記第2電極の領域の外側において前記第2電極を囲む貫通溝が形成されており、
前記接続部は、前記貫通溝を埋める導体によって構成されている、半導体装置。 - 請求項9から請求項16のいずれか一項に記載の半導体装置において、
前記再配線層は、多層の再配線部を含む多層再配線層であり、
前記多層の再配線部は、前記電極パッドの配置ピッチを拡げるファンアウト配線を含み、
前記第1電極および前記第2電極は、前記ファンアウト配線によって、前記外部接続部に接続されている、半導体装置。 - 請求項17に記載の半導体装置において、
平面視において、前記半導体チップに対応した領域の外側に位置する再配線層の領域に配置された前記薄膜キャパシタを、さらに備える、半導体装置。 - 請求項18に記載の半導体装置において、
前記再配線層の前記領域に配置された前記薄膜キャパシタに接続される積層セラミックコンデンサを、前記再配線層の表面に、さらに備える、半導体装置。 - 請求項9から請求項19のいずれか一項に記載の半導体装置において、
前記接着部は、前記第1電極の下面に貼り付けられた接着シートである、半導体装置。 - 請求項9から請求項19のいずれか一項に記載の半導体装置において、
前記接着部として、前記保護膜上に設けられた接着層を備える、半導体装置。
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