JP2021192461A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2021192461A JP2021192461A JP2021152878A JP2021152878A JP2021192461A JP 2021192461 A JP2021192461 A JP 2021192461A JP 2021152878 A JP2021152878 A JP 2021152878A JP 2021152878 A JP2021152878 A JP 2021152878A JP 2021192461 A JP2021192461 A JP 2021192461A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 146
- 230000002093 peripheral effect Effects 0.000 claims abstract description 45
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 21
- 229920005591 polysilicon Polymers 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
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- 239000011229 interlayer Substances 0.000 description 15
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- 229910016570 AlCu Inorganic materials 0.000 description 7
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- 229910052796 boron Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
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- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
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- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
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- 238000005192 partition Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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Abstract
Description
前記複数のセルを制御するための電気接続用の制御パッドと、前記制御パッドを連続して囲むように、前記制御パッドの周囲に形成されたパッド周辺部と、前記制御パッドの下方に部分的に配置されたポリシリコンからなる内蔵抵抗であって、前記制御パッドと前記パッド周辺部とを電気的に接続する内蔵抵抗と、電気接続用の複数のソースパッドとを備え、前記制御パッドと前記パッド周辺部との間に空間が形成されるように、前記制御パッドは同じ層において前記パッド周辺部から物理的に分離されており、前記制御パッドは、前記半導体層の縁部周辺に形成されており、接続部材が接続される接続部分は、前記制御パッドの表面上に選択的に形成されており、前記内蔵抵抗は、平面図において前記接続部分を避けた領域に選択的に配置されている、半導体装置を提供する。
前記SiC半導体層の表面側に形成され、制御パッドに入力される制御電圧をその制御電極に受けてオン/オフ制御される複数のトランジスタセルと、
前記制御パッドよりも前記SiC半導体層側に配置され、前記制御パッドと前記制御電極とを電気的に接続するとともに、前記複数のトランジスタセルのオン抵抗値のばらつきを低減するための内蔵抵抗とを含み、
前記制御パッドの表面には、最表面に形成された表面絶縁膜から露出してボンディングワイヤが接続される第1のワイヤ領域が選択的に形成されており、
前記内蔵抵抗は、前記SiC半導体層の法線方向から見た平面視において、前記第1のワイヤ領域を回避した領域に選択的に配置され、
前記複数のトランジスタセルの上方には、前記複数のトランジスタセルの一方の主電極が接続されかつ前記制御パッドとは異なる主電極パッドが配置されており、
前記主電極パッドの表面には、前記表面絶縁膜から露出してボンディングワイヤが接続される第2のワイヤ領域が選択的に形成されている、半導体装置。
前記内蔵抵抗は、層間膜を介して前記制御パッドの下方領域の前記第1のワイヤ領域を外れた領域に配置されている、「A1」に記載の半導体装置。
前記制御パッドの下方領域のうち前記内蔵抵抗が配置されていない第1領域には、前記層間膜が埋設されている、「A2」に記載の半導体装置。
前記第1領域には、前記絶縁膜の延長部で構成された膜が前記層間膜と前記SiC半導体層との間に配置されている、「A3」に記載の半導体装置。
前記第1のワイヤ領域は、前記周縁部に取り囲まれた前記制御パッドの中央部に形成されている、「A1」〜「A5」のいずれかに記載の半導体装置。
前記内蔵抵抗は、前記制御パッドと前記フィンガーとを電気的に接続している、「A1」〜「A15」のいずれかに記載の半導体装置。
前記制御パッドは、前記MOSFETセルの制御電極に接続され、
前記主電極パッドは前記MOSFETセルのソース電極に接続され、
前記SiC半導体層の裏面側に形成されたドレイン電極を含む、「A1」〜「A19」のいずれかに記載の半導体装置。
前記制御パッドは、前記IGBTセルの制御電極に接続され、
前記主電極パッドは前記IGBTセルのエミッタ電極に接続され、
前記SiC半導体層の裏面側に形成されたコレクタ電極を含む、「A1」〜「A19」のいずれかに記載の半導体装置。
前記半導体層の表面側に形成され、制御パッドに入力される制御電圧を制御電極に受けてオン/オフ制御される複数のトランジスタセルと、
前記複数のトランジスタセルが形成された領域を複数の領域に区画するように前記制御パッドから延び、前記制御パッドに電気的に接続されたフィンガーと、
前記制御パッドおよび前記フィンガーよりも前記半導体層側に配置され、前記制御パッドと前記フィンガーとを電気的に接続し、前記フィンガーと同じがそれよりも大きい抵抗値を有する材料からなる内蔵抵抗とを含み、
前記制御パッドの表面には、最表面に形成された表面絶縁膜から露出してボンディングワイヤがボンディングされる第1のワイヤ領域が選択的に形成されており、
前記内蔵抵抗は、前記半導体層の法線方向から見た平面視において、前記第1のワイヤ領域を回避した領域に選択的に配置され、
前記複数のトランジスタセルの上方には、前記複数のトランジスタセルの一方の主電極が接続されかつ前記制御パッドとは異なる主電極パッドが配置されており、
前記主電極パッドの表面には、前記表面絶縁膜から露出してボンディングワイヤが接続される第2のワイヤ領域が選択的に形成されている、半導体装置。
2 アクティブ領域
4 ゲートパッド
5 ゲートフィンガー
7 内側セル領域
12 パッド周辺部
13 第1フィンガー
14 第2フィンガー
15 主部位
16 枝部
18 トランジスタセル
19 ゲート電極
20 ゲートコンタクト
21 内蔵抵抗
22 パッド側コンタクト
23 セル側コンタクト
24 周縁部
27 SiC基板
28 SiCエピタキシャル層
29 p−型ボディ領域
30 n+型ボディ領域
31 p+型ボディコンタクト領域
32 チャネル領域
33 p+型領域
34 p−型領域
35 ゲート絶縁膜
36 層間膜
37 パッド側コンタクト
38 パッド側コンタクト
39 ゲートトレンチ
44 ゲートメタル
Claims (14)
- 半導体層と、
前記半導体層に形成された複数のセルと、
前記複数のセルを制御するための電気接続用の制御パッドと、
前記制御パッドを連続して囲むように、前記制御パッドの周囲に形成されたパッド周辺部と、
前記制御パッドの下方に部分的に配置されたポリシリコンからなる内蔵抵抗であって、前記制御パッドと前記パッド周辺部とを電気的に接続する内蔵抵抗と、
電気接続用の複数のソースパッドとを備え、
前記制御パッドと前記パッド周辺部との間に空間が形成されるように、前記制御パッドは同じ層において前記パッド周辺部から物理的に分離されており、前記制御パッドは、前記半導体層の縁部周辺に形成されており、
接続部材が接続される接続部分は、前記制御パッドの表面上に選択的に形成されており、
前記内蔵抵抗は、平面図において前記接続部分を避けた領域に選択的に配置されている、半導体装置。 - 前記接続部分が、平面図で前記制御パッドの表面領域の半分以上を占める、請求項1に記載の半導体装置。
- 前記パッド周辺部から延びるゲートフィンガーをさらに備える、請求項1または2に記載の半導体装置。
- 前記ゲートフィンガーが、前記パッド周辺部から3方向に延びる、請求項3に記載の半導体装置。
- 前記ゲートフィンガーが、前記半導体装置の四隅に延びる部分を有する、請求項4に記載の半導体装置。
- 前記ゲートフィンガーの幅が前記内蔵抵抗器の幅よりも狭い、請求項3〜5のいずれか一項に記載の半導体装置。
- 前記内蔵抵抗は、平面図において長方形の形状を有する、請求項1〜6のいずれか一項に記載の半導体装置。
- 前記制御パッドがアルミニウムを含む材料から構成されている、請求項1〜7のいずれか一項に記載の半導体装置。
- 前記パッド周辺部がアルミニウムを含む材料から構成されている、請求項1〜8のいずれか一項に記載の半導体装置。
- 前記ソースパッドのそれぞれは、アルミニウムを含む材料から構成されている、請求項1〜9のいずれか一項に記載の半導体装置。
- 前記半導体装置は、平面図において長方形の形状を有し、
前記制御パッドは、平面図で前記半導体装置の1辺の中央付近に設けられている、請求項1〜10のいずれか一項に記載の半導体装置。 - 前記パッド周辺部が前記制御パッドと同じ厚さを有する、請求項1〜11のいずれか一項に記載の半導体装置。
- 前記内蔵抵抗が、前記制御パッドの下方領域に部分的に配置され、前記内蔵抵抗と前記制御パッドとの間に層間膜が選択的に配置される、請求項1〜12のいずれか一項に記載の半導体装置。
- 前記接続部分が前記制御パッドの中央部分に形成されている、請求項1〜13のいずれか一項に記載の半導体装置。
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US20240153955A1 (en) | 2024-05-09 |
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EP3076431A4 (en) | 2017-08-09 |
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US10886300B2 (en) | 2021-01-05 |
CN106415837A (zh) | 2017-02-15 |
CN110634825B (zh) | 2023-04-18 |
EP3076431A1 (en) | 2016-10-05 |
EP3644363A1 (en) | 2020-04-29 |
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US9917102B2 (en) | 2018-03-13 |
CN106415837B (zh) | 2019-10-22 |
US10438971B2 (en) | 2019-10-08 |
CN110634825A (zh) | 2019-12-31 |
EP3076431B1 (en) | 2020-07-08 |
US11908868B2 (en) | 2024-02-20 |
EP3644363B1 (en) | 2022-11-09 |
US20190386025A1 (en) | 2019-12-19 |
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US20160379992A1 (en) | 2016-12-29 |
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