JP5609876B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5609876B2 JP5609876B2 JP2011528813A JP2011528813A JP5609876B2 JP 5609876 B2 JP5609876 B2 JP 5609876B2 JP 2011528813 A JP2011528813 A JP 2011528813A JP 2011528813 A JP2011528813 A JP 2011528813A JP 5609876 B2 JP5609876 B2 JP 5609876B2
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- 239000004065 semiconductor Substances 0.000 title claims description 136
- 230000002093 peripheral effect Effects 0.000 claims description 72
- 239000000758 substrate Substances 0.000 claims description 30
- 239000012535 impurity Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 190
- 108091006146 Channels Proteins 0.000 description 32
- 230000004048 modification Effects 0.000 description 20
- 238000012986 modification Methods 0.000 description 20
- 230000015556 catabolic process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005684 electric field Effects 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 102000004129 N-Type Calcium Channels Human genes 0.000 description 1
- 108090000699 N-Type Calcium Channels Proteins 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
- H01L29/0619—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE] with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0638—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for preventing surface leakage due to surface inversion layer, e.g. with channel stopper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/402—Field plates
- H01L29/407—Recessed field plates, e.g. trench field plates, buried field plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/70—Bipolar devices
- H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
- H01L29/739—Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
- H01L29/7395—Vertical transistors, e.g. vertical IGBT
- H01L29/7396—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions
- H01L29/7397—Vertical transistors, e.g. vertical IGBT with a non planar surface, e.g. with a non planar gate or with a trench or recess or pillar in the surface of the emitter, base or collector region for improving current density or short circuiting the emitter and base regions and a gate structure lying on a slanted or vertical surface or formed in a groove, e.g. trench gate IGBT
Description
図3に示すように、実施例1の変形例1に係る半導体装置においては、ベース層2の横方向の広がりが、最外周に配設された外周トレンチ14に至らず、この最外周に配設された外周トレンチ14のセル領域側となる内側まで延伸されている。更に、ベース層2の横方向の広がりは、この変形例1において、チャネルストッパ層6の内部であって、チャネルストッパ層7まで至らない範囲内において延伸されている。
図5に示すように、実施例1の変形例2に係る半導体装置においては、ベース層2の横方向の広がりが、最外周に配設された外周トレンチ14の領域において終端とならずに、この最外周に配設された外周トレンチ14よりも更に外側に延伸されている。更に、ベース層2の横方向の広がりは、この変形例2において、チャネルストッパ層6の内部であって、チャネルストッパ層7まで至らない範囲内において延伸されている。
図6に示すように、実施例1の変形例3に係る半導体装置においては、変形例2に係る半導体装置と同様に、ベース層2の横方向の広がりが、最外周に配設された外周トレンチ14の領域において終端とならずに、この最外周に配設された外周トレンチ14よりも更に外側に延伸されている。変形例3に係る半導体装置は、更に、ベース層2の横方向の端部とチャネルストッパ層6の端部とが隣接し、ここでは互いに接触しpn接合を形成している。
図8に示すように、実施例2の変形例に係る半導体装置は、実施例2に係る半導体装置の外周領域において、最外周に配設された外周トレンチ14内部に充填された導電層24に接続され、半導体基体10上において突出し、EQR電極25の第1のフランジ部25Fに重複して配設された第2のフランジ部24Fを備えている。
2 ベース層
3 エミッタ層
4 コレクタ層
5 バッファ層
6、7 チャネルストッパ層
8A、8B 空乏層
12 ゲート絶縁膜
13、16 層間絶縁膜
14 外周トレンチ
15、16 絶縁膜
21 ゲート電極
22 エミッタ電極
23 コレクタ電極
24 導電層
24F 第2のフランジ部
25 EQR電極
25F 第1のフランジ部
Claims (7)
- 第1導電型を有する第1の半導体層と、
前記第1の半導体層の表面に島状に形成され、且つ、前記第1導電型とは異なる第2導電型を有する第2の半導体層と、
前記第2の半導体層の表面に島状に形成され、且つ、前記第1導電型を有する第3の半導体層と、
前記第2の半導体層と前記第3の半導体層とを貫通して前記第1の半導体層の内部に達する複数のゲートトレンチと、を有するセル領域と、
前記セル領域の周囲において、前記第2の半導体層を貫通し、前記第1の半導体層内に達する複数の外周トレンチと、
前記セル領域の周囲において前記セル領域から離れた前記第1の半導体層の最外周領域における表面に島状に形成され、且つ、前記第1導電型を有する終端層と、を有する外周領域と、を備え、
前記第1の半導体層、前記第2の半導体層、前記第3の半導体層及び前記終端層が、前記第1の半導体層の表面側において前記第1の半導体層が表面に露出されない半導体基体を構成し、
前記終端層の不純物濃度が前記第2半導体層の不純物濃度に対して0.2%〜1.0%に形成され、前記終端層は、隣接する前記外周トレンチ同士を結合する容量が不均一になることを抑制するように形成されることを特徴とする半導体装置。 - 前記終端層が、前記第2の半導体層に隣接し、前記第2の半導体層の拡散層端が、前記外周トレンチに隣接していることを特徴とする請求項1に記載の半導体装置。
- 前記終端層が、前記第2の半導体層に隣接し、前記第2の半導体層の拡散層端が、最外周に配設された前記外周トレンチよりも前記セル領域側に配設されていることを特徴とする請求項1に記載の半導体装置。
- 前記終端層に接続され、前記最外周に配設された前記外周トレンチ上にこの外周トレンチに重複して配設される第1のフランジ部を有する等電位リング電極を更に備えたことを特徴とする請求項1に記載の半導体装置。
- 前記終端層に接続され、前記最外周に配設された前記外周トレンチ上にこの外周トレンチに重複して配設される第1のフランジ部を有する等電位リング電極を更に備えたことを特徴とする請求項2に記載の半導体装置。
- 前記終端層に接続され、前記最外周に配設された前記外周トレンチ上にこの外周トレンチに重複して配設される第1のフランジ部を有する等電位リング電極を更に備えたことを特徴とする請求項3に記載の半導体装置。
- 前記最外周に配設された前記外周トレンチ内部に充填された導電層に接続され、この外周トレンチの周囲に前記半導体基体上において突出し、前記等電位リング電極の前記第1のフランジ部に重複して配設された第2のフランジ部を更に備えたことを特徴とする請求項4に記載の半導体装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2011528813A JP5609876B2 (ja) | 2009-08-28 | 2010-08-25 | 半導体装置 |
Applications Claiming Priority (4)
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JP2009198615 | 2009-08-28 | ||
JP2009198615 | 2009-08-28 | ||
PCT/JP2010/064349 WO2011024842A1 (ja) | 2009-08-28 | 2010-08-25 | 半導体装置 |
JP2011528813A JP5609876B2 (ja) | 2009-08-28 | 2010-08-25 | 半導体装置 |
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JPWO2011024842A1 JPWO2011024842A1 (ja) | 2013-01-31 |
JP5609876B2 true JP5609876B2 (ja) | 2014-10-22 |
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JP2011528813A Active JP5609876B2 (ja) | 2009-08-28 | 2010-08-25 | 半導体装置 |
Country Status (5)
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US (1) | US8969954B2 (ja) |
JP (1) | JP5609876B2 (ja) |
KR (1) | KR101353903B1 (ja) |
CN (1) | CN102484131B (ja) |
WO (1) | WO2011024842A1 (ja) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014078689A (ja) * | 2012-09-20 | 2014-05-01 | Toshiba Corp | 電力用半導体装置、および、電力用半導体装置の製造方法 |
CN103824883B (zh) * | 2012-11-19 | 2017-05-03 | 比亚迪股份有限公司 | 一种具有终端耐压结构的沟槽mosfet的及其制造方法 |
KR20140073325A (ko) | 2012-12-06 | 2014-06-16 | 삼성전기주식회사 | 전력 반도체 소자 및 그 제조방법 |
KR20150030799A (ko) * | 2013-09-12 | 2015-03-23 | 매그나칩 반도체 유한회사 | 반도체 소자 및 그 제조 방법 |
JP6160477B2 (ja) * | 2013-12-25 | 2017-07-12 | トヨタ自動車株式会社 | 半導体装置 |
JP2015146368A (ja) * | 2014-02-03 | 2015-08-13 | 株式会社東芝 | 半導体装置 |
JP2015185656A (ja) * | 2014-03-24 | 2015-10-22 | サンケン電気株式会社 | 半導体装置 |
JP6641983B2 (ja) * | 2015-01-16 | 2020-02-05 | 株式会社デンソー | 半導体装置 |
CN104716192B (zh) * | 2015-03-31 | 2017-09-05 | 无锡新洁能股份有限公司 | 利用电荷耦合实现耐压的功率mos器件及其制备方法 |
JP6624370B2 (ja) * | 2015-09-30 | 2019-12-25 | サンケン電気株式会社 | 半導体装置 |
JP6791084B2 (ja) * | 2017-09-28 | 2020-11-25 | 豊田合成株式会社 | 半導体装置 |
JP7201005B2 (ja) * | 2018-12-14 | 2023-01-10 | サンケン電気株式会社 | 半導体装置 |
KR102531988B1 (ko) * | 2018-12-14 | 2023-05-11 | 산켄덴키 가부시키가이샤 | 반도체 장치 |
CN111129108A (zh) * | 2019-11-20 | 2020-05-08 | 深圳深爱半导体股份有限公司 | 晶体管终端结构及其制造方法 |
CN114582959B (zh) * | 2022-05-06 | 2022-08-02 | 绍兴中芯集成电路制造股份有限公司 | 沟槽型功率mos器件及其制造方法 |
CN117059669B (zh) * | 2023-10-09 | 2024-02-06 | 华羿微电子股份有限公司 | 一种屏蔽栅型mosfet终端结构及制作方法 |
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JPH1187698A (ja) * | 1997-09-02 | 1999-03-30 | Kansai Electric Power Co Inc:The | 高耐圧半導体装置及びこの装置を用いた電力変換器 |
JP2006332127A (ja) * | 2005-05-23 | 2006-12-07 | Toshiba Corp | 電力用半導体装置 |
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JP2007221024A (ja) * | 2006-02-20 | 2007-08-30 | Toshiba Corp | 半導体装置 |
WO2009013967A1 (ja) * | 2007-07-24 | 2009-01-29 | Sanken Electric Co., Ltd. | 半導体装置 |
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JP3275536B2 (ja) * | 1994-05-31 | 2002-04-15 | 三菱電機株式会社 | 半導体装置及びその製造方法 |
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2010
- 2010-08-25 JP JP2011528813A patent/JP5609876B2/ja active Active
- 2010-08-25 KR KR1020127002034A patent/KR101353903B1/ko active IP Right Grant
- 2010-08-25 US US13/388,565 patent/US8969954B2/en active Active
- 2010-08-25 CN CN201080037940.8A patent/CN102484131B/zh active Active
- 2010-08-25 WO PCT/JP2010/064349 patent/WO2011024842A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1187698A (ja) * | 1997-09-02 | 1999-03-30 | Kansai Electric Power Co Inc:The | 高耐圧半導体装置及びこの装置を用いた電力変換器 |
JP2006332127A (ja) * | 2005-05-23 | 2006-12-07 | Toshiba Corp | 電力用半導体装置 |
JP2007036221A (ja) * | 2005-07-07 | 2007-02-08 | Infineon Technologies Ag | チャネル阻止ゾーンを有する半導体部品 |
JP2007059766A (ja) * | 2005-08-26 | 2007-03-08 | Sanken Electric Co Ltd | トレンチ構造半導体装置及びその製造方法 |
JP2007123570A (ja) * | 2005-10-28 | 2007-05-17 | Toyota Industries Corp | 半導体装置 |
JP2007221024A (ja) * | 2006-02-20 | 2007-08-30 | Toshiba Corp | 半導体装置 |
WO2009013967A1 (ja) * | 2007-07-24 | 2009-01-29 | Sanken Electric Co., Ltd. | 半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
CN102484131B (zh) | 2015-06-17 |
US8969954B2 (en) | 2015-03-03 |
WO2011024842A1 (ja) | 2011-03-03 |
KR101353903B1 (ko) | 2014-01-22 |
US20120126284A1 (en) | 2012-05-24 |
JPWO2011024842A1 (ja) | 2013-01-31 |
CN102484131A (zh) | 2012-05-30 |
KR20120029477A (ko) | 2012-03-26 |
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