JP2006005275A - 電力用半導体素子 - Google Patents
電力用半導体素子 Download PDFInfo
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/028—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs
- H10D30/0291—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
- H10D30/665—Vertical DMOS [VDMOS] FETs having edge termination structures
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/102—Constructional design considerations for preventing surface leakage or controlling electric field concentration
- H10D62/103—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices
- H10D62/105—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE]
- H10D62/109—Reduced surface field [RESURF] PN junction structures
- H10D62/111—Multiple RESURF structures, e.g. double RESURF or 3D-RESURF structures
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- H10D62/102—Constructional design considerations for preventing surface leakage or controlling electric field concentration
- H10D62/103—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices
- H10D62/105—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE]
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- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/102—Constructional design considerations for preventing surface leakage or controlling electric field concentration
- H10D62/103—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices
- H10D62/105—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE]
- H10D62/106—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE] having supplementary regions doped oppositely to or in rectifying contact with regions of the semiconductor bodies, e.g. guard rings with PN or Schottky junctions
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/102—Constructional design considerations for preventing surface leakage or controlling electric field concentration
- H10D62/112—Constructional design considerations for preventing surface leakage or controlling electric field concentration for preventing surface leakage due to surface inversion layers, e.g. by using channel stoppers
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- H10D64/00—Electrodes of devices having potential barriers
- H10D64/111—Field plates
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- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/23—Electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. sources, drains, anodes or cathodes
- H10D64/251—Source or drain electrodes for field-effect devices
- H10D64/252—Source or drain electrodes for field-effect devices for vertical or pseudo-vertical devices
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Abstract
【解決手段】 素子部にスーパージャンクション構造を構成し、第1導電型の第1ピラー層及び第2導電型の第2ピラー層と、素子部のスーパージャンクション構造に隣接し、素子部よりも垂直方向の厚さが薄いスーパージャンクション構造を素子終端部に構成し、第1導電型の第3ピラー層及び第2導電型の第4ピラー層と、素子終端部のスーパージャンクション構造の最も素子部側の第3又は第4ピラー層上に積層されて、素子部のスーパージャンクション構造の最も素子終端部側の最外部に付加形成され、不純物濃度が第1及び第2ピラー層よりも低い最外部ピラー層と、第3ピラー層及び第4ピラー層上に形成され、各ピラー層よりも高い抵抗値を有する第1導電型の高抵抗層と、を少なくとも備えている。
【選択図】 図1
Description
2 n型ピラー層
3 p型ピラー層
4 p型ベース層
5 n+型ソース層
6 ソース電極
7 ゲート絶縁膜
8 ゲート電極
9 ドレイン電極
10 n型ピラー層
11 p型ピラー層
12 高抵抗n−型層
13 RESURF層
14 最外部p−型ピラー層
15 フィールドプレート電極
16 絶縁膜
17 最外部n型ピラー層
18 高抵抗n−型層
19 最外部p型ピラー層
20 p型ガードリング層
21 フィールドストップ電極
22 p型ストッパ層
23 n型ストッパ層
Claims (5)
- 第1導電型のドレイン層と、
素子部の前記ドレイン層上にスーパージャンクション構造を構成し、柱状断面構造を有して水平方向に交互に配置形成された第1導電型の第1ピラー層及び第2導電型の第2ピラー層と、
前記第2ピラー層の表面部に形成された第2導電型のベース層と、
前記ベース層の表面部に形成された第1導電型のソース層と、
一のベース層と当該一のベース層に前記第1ピラー層を介して隣接する他のベース層の表面部にそれぞれ形成された前記ソース層の一方から他方までに亘る領域上にゲート絶縁膜を介して形成されたゲート電極と、
前記素子部のスーパージャンクション構造に隣接し、前記素子部のスーパージャンクション構造よりも垂直方向の厚さが薄いスーパージャンクション構造を素子終端部の前記ドレイン層上に構成し、柱状断面構造を有して水平方向に交互に配置形成された第1導電型の第3ピラー層及び第2導電型の第4ピラー層と、
前記素子終端部のスーパージャンクション構造の最も前記素子部側の前記第3又は第4ピラー層上に積層されて、前記素子部のスーパージャンクション構造の最も前記素子終端部側の最外部に付加形成され、不純物濃度が前記第1及び第2ピラー層よりも低い最外部ピラー層と、
前記第3ピラー層及び前記第4ピラー層上に形成され、前記各ピラー層及び前記ベース層よりも高い抵抗値を有する第1導電型の高抵抗層と、
前記ベース層及び前記ソース層に電気的に接続されるように形成されたソース電極と、 前記ドレイン層の裏面に形成されたドレイン電極と、
を備えていることを特徴とする電力用半導体素子。 - 前記最外部ピラー層の不純物濃度は、前記第1及び第2ピラー層の不純物濃度の0.45倍乃至0.55倍であることを特徴とする請求項1に記載の電力用半導体素子。
- 前記高抵抗層は、前記ベース層よりも厚いことを特徴とする請求項1又は2に記載の電力用半導体素子。
- 第1導電型のドレイン層と、
素子部の前記ドレイン層上にスーパージャンクション構造を構成し、第1導電型の単位第1ピラー層及び第2導電型の単位第2ピラー層がそれぞれ積層されて一体化した柱状断面構造を有して水平方向に交互に配置形成された第1導電型の第1ピラー層及び第2導電型の第2ピラー層と、
前記第2ピラー層の表面部に形成された第2導電型のベース層と、
前記ベース層の表面部に形成された第1導電型のソース層と、
一のベース層と当該一のベース層に前記第1ピラー層を介して隣接する他のベース層の表面部にそれぞれ形成された前記ソース層の一方から他方までに亘る領域上にゲート絶縁膜を介して形成されたゲート電極と、
前記第1ピラー層及び前記第2ピラー層を構成する前記単位第1ピラー層及び前記単位第2ピラー層よりも低い密度で形成された第1導電型又は第2導電型の最外部単位ピラー層が積層されて一体化した柱状断面構造を有し、前記素子部のスーパージャンクション構造の最も素子終端部側の最外部に付加形成された第1導電型又は第2導電型の最外部ピラー層と、
前記素子部に隣接する前記素子終端部の前記ドレイン層上に形成され、前記各ピラー層及び前記ベース層よりも高い抵抗値を有する第1導電型の高抵抗層と、
前記ベース層及び前記ソース層に電気的に接続されるように形成されたソース電極と、 前記ドレイン層の裏面に形成されたドレイン電極と、
を備えていることを特徴とする電力用半導体素子。 - 前記最外部ピラー層を構成する前記最外部単位ピラー層の密度は、前記第1ピラー層及び前記第2ピラー層を構成する前記単位第1ピラー層及び前記単位第2ピラー層の密度の約半分であることを特徴とする請求項4に記載の電力用半導体素子。
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|---|---|---|---|
| JP2004182216A JP2006005275A (ja) | 2004-06-21 | 2004-06-21 | 電力用半導体素子 |
| US10/961,135 US7161209B2 (en) | 2004-06-21 | 2004-10-12 | Power semiconductor device |
| US11/551,526 US7317225B2 (en) | 2004-06-21 | 2006-10-20 | Power semiconductor device |
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| JP2004182216A JP2006005275A (ja) | 2004-06-21 | 2004-06-21 | 電力用半導体素子 |
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| JP (1) | JP2006005275A (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20070040217A1 (en) | 2007-02-22 |
| US7161209B2 (en) | 2007-01-09 |
| US20050280086A1 (en) | 2005-12-22 |
| US7317225B2 (en) | 2008-01-08 |
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