JP2020113709A - 半導体装置 - Google Patents
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- JP2020113709A JP2020113709A JP2019005484A JP2019005484A JP2020113709A JP 2020113709 A JP2020113709 A JP 2020113709A JP 2019005484 A JP2019005484 A JP 2019005484A JP 2019005484 A JP2019005484 A JP 2019005484A JP 2020113709 A JP2020113709 A JP 2020113709A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 55
- 239000012535 impurity Substances 0.000 claims abstract description 37
- 239000010410 layer Substances 0.000 claims description 88
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000000758 substrate Substances 0.000 description 10
- 239000011229 interlayer Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Abstract
Description
第1実施形態について、図面を参照しつつ説明する。本実施形態の半導体装置は、図1に示されるように、メインセル領域Rm、センスセル領域Rs、中間領域Rc、周辺領域Rpを有している。そして、半導体装置は、センスセル領域Rsが中間領域Rcを介してメインセル領域Rmに囲まれると共に、メインセル領域Rmが周辺領域Rpに囲まれる構成とされている。
第2実施形態について説明する。本実施形態は、第1実施形態に対し、ボディ層13の構成を変更したものである。その他に関しては、上記第1実施形態と同様であるため、ここでは説明を省略する。
第3実施形態について説明する。本実施形態は、第2実施形態に対し、ボディ層13の構成を変更したものである。その他に関しては、上記第1実施形態と同様であるため、ここでは説明を省略する。
第4実施形態について説明する。本実施形態は、第1実施形態に対し、メインセル領域Rmおよびセンスセル領域Rmの平面形状を変更したものである。その他に関しては、上記第1実施形態と同様であるため、ここでは説明を省略する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
12 ドリフト層
13 ボディ層
14 ソース領域
16 ゲート絶縁膜
17 ゲート電極
19m メインコンタクトトレンチ
19s センスコンタクトトレンチ
22m メイン上部電極
22s センス下部電極
24 下部電極
Claims (6)
- メインセル領域(Rm)およびセンスセル領域(Rs)に同じ半導体スイッチング素子がそれぞれ形成され、前記センスセル領域の前記半導体スイッチング素子に流れる電流に基づいて前記メインセル領域の前記半導体スイッチング素子に流れる電流が検出される半導体装置であって、
前記半導体スイッチング素子は、
第1導電型のドリフト層(12)と、
前記ドリフト層上に形成された第2導電型のボディ層(13)と、
前記ボディ層の表層部に形成され、前記ドリフト層より高不純物濃度とされた第1導電型の第1不純物領域(14)と、
前記第1不純物領域と前記ドリフト層との間に挟まれた前記ボディ層の表面に配置されたゲート絶縁膜(16)と、
前記ゲート絶縁膜上に配置されたゲート電極(17)と、
前記ドリフト層を挟んで前記ボディ層と反対側に形成され、前記ドリフト層よりも高不純物濃度とされた第1導電型または第2導電型の第2不純物領域(11)と、
前記第1不純物領域および前記ボディ層と電気的に接続される第1電極(22m、22s)と、
前記第2不純物領域と電気的に接続される第2電極(24)と、を備え、
前記メインセル領域には、一方向に沿って延設されると共に前記第1不純物領域および前記ボディ層を露出させるメインコンタクトトレンチ(19m、19s)が形成され、
前記センスセル領域には、前記一方向に沿って延設されると共に前記第1不純物領域および前記ボディ層を露出させ、前記メインコンタクトトレンチと分離されているセンスコンタクトトレンチ(19s)が形成され、
前記メインコンタクトトレンチおよび前記センスコンタクトトレンチには、前記第1不純物領域および前記ボディ層と電気的に接続される接続電極(20)が配置され、
前記第1電極は、前記メインコンタクトトレンチに配置された前記接続電極と接続されるメイン上部電極(19m)と、前記センスコンタクトトレンチに配置された前記接続電極と接続され、前記メイン上部電極と分離されたセンス上部電極(19s)と、を有し、
前記ドリフト層と前記ボディ層との積層方向から視たとき、
前記一方向において、前記メインコンタクトトレンチおよび前記メインセル領域に形成された前記第1不純物領域は、前記メイン上部電極より前記センス上部電極側に突出しており、前記センスコンタクトトレンチおよび前記センスセル領域に形成された前記第1不純物領域は、前記センス上部電極より前記メイン上部電極側に突出している半導体装置。 - 前記積層方向から視たとき、前記一方向において、前記メインコンタクトトレンチは、前記メインセル領域に形成された前記第1不純物領域より前記センス上部電極側に突出しており、前記センスコンタクトトレンチは、前記センスセル領域に形成された前記第1不純物領域より前記メイン上部電極側に突出している請求項1に記載の半導体装置。
- 前記メインセル領域に形成されたボディ層と前記センスセル領域に形成されたボディ層とは、分断されている請求項1または2に記載の半導体装置。
- 前記メインセル領域に形成されたボディ層と前記センスセル領域に形成されたボディ層との間には、前記ドリフト層が配置されている請求項3に記載の半導体装置。
- 前記メインセル領域に形成されたボディ層と前記センスセル領域に形成されたボディ層との間には、前記ボディ層よりも高不純物濃度とされた第2導電型の分離層(25)が形成されている請求項3に記載の半導体装置。
- 前記積層方向から視たとき、
前記センスセル領域は、円状に形成されており、
前記メインセル領域は、前記センスセル領域における外縁部との間隔が前記センスセル領域の外周の周方向において一定となるように形成されている請求項1ないし5のいずれか1つに記載の半導体装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2019005484A JP7092044B2 (ja) | 2019-01-16 | 2019-01-16 | 半導体装置 |
CN202080009119.9A CN113302732B (zh) | 2019-01-16 | 2020-01-09 | 半导体装置 |
PCT/JP2020/000489 WO2020149211A1 (ja) | 2019-01-16 | 2020-01-09 | 半導体装置 |
US17/373,869 US11923452B2 (en) | 2019-01-16 | 2021-07-13 | Semiconductor device having semiconductor switching element in sense cell region |
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JP2019005484A JP7092044B2 (ja) | 2019-01-16 | 2019-01-16 | 半導体装置 |
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JP2020113709A true JP2020113709A (ja) | 2020-07-27 |
JP2020113709A5 JP2020113709A5 (ja) | 2021-04-22 |
JP7092044B2 JP7092044B2 (ja) | 2022-06-28 |
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WO2023037430A1 (ja) * | 2021-09-08 | 2023-03-16 | 三菱電機株式会社 | 半導体装置 |
Citations (6)
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