JP5600698B2 - SiC素子搭載パワー半導体モジュール - Google Patents
SiC素子搭載パワー半導体モジュール Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 40
- 229920005989 resin Polymers 0.000 claims description 79
- 239000011347 resin Substances 0.000 claims description 79
- 230000005684 electric field Effects 0.000 claims description 47
- 229920001296 polysiloxane Polymers 0.000 claims description 24
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 229920002614 Polyether block amide Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000004962 Polyamide-imide Substances 0.000 claims description 2
- 229920002312 polyamide-imide Polymers 0.000 claims description 2
- 239000009719 polyimide resin Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims 1
- 239000011147 inorganic material Substances 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 11
- 239000002184 metal Substances 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002966 varnish Substances 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3157—Partial encapsulation or coating
- H01L23/3192—Multilayer coating
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- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/0212—Auxiliary members for bonding areas, e.g. spacers
- H01L2224/02122—Auxiliary members for bonding areas, e.g. spacers being formed on the semiconductor or solid-state body
- H01L2224/02163—Auxiliary members for bonding areas, e.g. spacers being formed on the semiconductor or solid-state body on the bonding area
- H01L2224/02165—Reinforcing structures
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- 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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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- 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
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—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
- H01L2224/48221—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
- H01L2224/48225—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
- H01L2224/48227—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 connecting the wire to a bond pad of the item
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/4847—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a wedge bond
- H01L2224/48472—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a wedge bond the other connecting portion not on the bonding area also being a wedge bond, i.e. wedge-to-wedge
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- 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
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
- H01L2224/85909—Post-treatment of the connector or wire bonding area
- H01L2224/8592—Applying permanent coating, e.g. protective coating
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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
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1305—Bipolar Junction Transistor [BJT]
- H01L2924/13055—Insulated gate bipolar transistor [IGBT]
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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)
- Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
Description
本発明に係るSiC素子搭載パワー半導体モジュール100の模式断面を図1に示す。本発明が対象とするSiC素子搭載パワー半導体モジュールは、SiC素子がスイッチング素子として搭載されていても良いし、フリーホイールダイオード素子として搭載されていても良いし、両方の素子として搭載されていても良い。
本発明の第二の実施形態に係るSiC素子部の模式断面を図4に示す。第一の実施形態と異なるのは、第一の実施形態のSiC素子部110の代わりに、第二の樹脂2BをSiC素子上面周辺部の電界緩和領域30を含む周辺部のみに配置したSiC素子部210を設けた点である。
本発明の第二の実施形態に係るSiC素子端部230の模式断面を図7に示す。第一の実施形態と異なるのは、電界緩和層の構造である。本実施形態では、電界緩和領域60を構成する第一のp領域60A、第二のp領域60B、第三のp領域60Cのホール濃度に差を設けず、互いに接しないように配置してある。このように構成することによって、段階的にp濃度の差をつけた領域を複数回に分けて設ける必要が無く、簡易にSiC素子1Aを作成することができる。なお、本実施形態を用いる場合、距離Lとは、アノード電極7Aから第三のp領域60Cの素子外周部側端部236との距離を意味し、幅Wは第二のp領域60Bと第三のp領域60Cとの間の領域の中間点237を意味する。
1B Si素子
2A 第一の樹脂層
2B 第二の樹脂層
3 シリコーンゲル
4 ワイヤーボンディング
5 接合層
6 セラミックス回路基板
6A1、6A2 配線パターン
6B セラミックス絶縁板
6C 金属パターン
Claims (7)
- 素子上面周辺部に電界緩和領域を有するSiCからなる半導体素子と、
前記半導体素子を封止するシリコーンゲルと、を有する半導体装置において、
前記電界緩和領域とシリコーンゲルとの間には、SiO2から成る無機層と、当該無機層の上部に形成された樹脂層とを有し、
前記樹脂層の誘電率は、前記無機層の誘電率以下であり、且つシリコーンゲルの誘電率以上であり、
前記樹脂層は、前記無機物と直接接触する第一の樹脂層と、当該第一の樹脂層の上に形成された第二の樹脂層からなり、
前記第二の樹脂層の厚みは前記第一の樹脂層の厚みよりも厚いことを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、
前記第二の樹脂層の厚さは50μm以上500μm以下であることを特徴とする半導体装置。 - 請求項1または2に記載の半導体装置において、
前記第二の樹脂層はポリアミドイミド樹脂、ポリエーテルアミドイミド樹脂、ポリエーテルアミド樹脂から選ばれる一種あるいは複数種類で構成されていることを特徴とする半導体装置。 - 請求項1乃至3のいずれかに記載の半導体装置において、
前記第一の樹脂層の厚さは1μm以上20μm以下であることを特徴とする半導体装置。 - 請求項1乃至4のいずれかに記載の半導体装置において、
前記第一の樹脂層はポリイミド樹脂であることを特徴とする半導体装置。 - 請求項1または2に記載の半導体装置において、
前記第二の樹脂層は、前記第一の樹脂層の誘電率よりも小さいことを特徴とする半導体装置。 - 請求項1乃至6のいずれかに記載の半導体装置において、
前記電界緩和領域は濃度の異なる複数のp領域で構成されることを特徴とする半導体装置。
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