JP5048214B2 - 低閾値電圧を有する短チャンネルトレンチパワーmosfet - Google Patents
低閾値電圧を有する短チャンネルトレンチパワーmosfet Download PDFInfo
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- JP5048214B2 JP5048214B2 JP2004502331A JP2004502331A JP5048214B2 JP 5048214 B2 JP5048214 B2 JP 5048214B2 JP 2004502331 A JP2004502331 A JP 2004502331A JP 2004502331 A JP2004502331 A JP 2004502331A JP 5048214 B2 JP5048214 B2 JP 5048214B2
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- 239000002019 doping agent Substances 0.000 claims description 65
- 239000007943 implant Substances 0.000 claims description 24
- 239000004065 semiconductor Substances 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/10—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 with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1095—Body region, i.e. base region, of DMOS transistors or IGBTs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41766—Source or drain electrodes for field effect devices with at least part of the source or drain electrode having contact below the semiconductor surface, e.g. the source or drain electrode formed at least partially in a groove or with inclusions of conductor inside the semiconductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electrodes Of Semiconductors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
8 ダイ、導電ゲート材料
10 トレンチ
12 エピタキシャル層
14 基板
16 ゲート絶縁層
18 ゲート導体材料、ゲート電極材料
20 ベース領域
21 点線
22 ソース領域
24 ソースコンタクト
26 高導電領域
28 絶縁プラグ
30 ドレインコンタクト
32 第1の点線
34 第2の点線
36 ドーパント濃度プロファイルの線
38 ピーク濃度
40 ピークドーパント濃度、ピーク濃度
41 ジャンクション
42 相互拡散領域
44 フィールド酸化膜
46 ウィンドウ
48 カウンタードープ領域
50 インプラント領域
52 ソースインプラント領域
Claims (9)
- 半導体デバイスであって、
拡散ドライブでドライブされた第1導電性タイプの第1の用量のドーパントと、前記第1の容量のドーパントより下の深さまでインプラントされた前記第1導電性タイプの第2用量のドーパントとを有するベース領域と、
少なくとも1つのゲート絶縁層を備えるゲート構造体と、
前記ベース領域内に形成されたソース領域と、
前記ソース領域および前記ゲート絶縁層に隣接する、前記ベース領域内のチャンネル領域と、
前記ベース領域に近接する第2導電性タイプのドリフト領域とを備え、
前記第1導電性タイプの前記第1の用量のドーパントを、前記第2導電性タイプの半導体材料からなる層内に第1の深さまでインプラントするステップと、前記第1用量のドーパントを拡散ドライブでドライブして、前記ベース領域を形成するステップと、前記第1導電性タイプの前記第2用量のドーパントを、前記ベース領域内に、前記第1の深さより下の第2の深さまでインプラントするステップと、ソースインプラントを行い、前記ベース領域にソースインプラント領域を得るステップと、前記ソースインプラント領域と前記第2用量のドーパントとをドライブして、前記ソース領域と、前記ベース領域内の実質的に一様なドーパント濃度プロファイルとを得るステップとを含む方法により製造されることを特徴とする半導体デバイス。 - 前記チャンネルの長さが、約0.3〜1.0μmである、請求項1に記載の半導体デバイス。
- 前記チャンネル領域が、ソースコンタクトと、前記第1導電性タイプの高導電領域とをさらに備え、前記高導電領域が、前記ベース領域内に形成され、前記ソースコンタクトが、前記ソース領域および前記高導電領域とオーム接触している、請求項1に記載の半導体デバイス。
- 前記ゲート構造体が、半導体基板上に支持された半導体材料のエピタキシャル層内に形成された側壁を有するトレンチであり、前記側壁の各々が、少なくとも前記ゲート酸化物層で裏打ちされている、請求項1に記載の半導体デバイス。
- 前記ソースコンタクトが凹部内に延在し、前記高導電領域が凹部の底に位置し、前記ソース領域が前記凹部の側壁に位置している、請求項3に記載の半導体デバイス。
- 閾値電圧が低下した短チャンネルトレンチMOSFETを得るための方法であって、
第1導電性タイプの第1の用量のドーパントを、第2導電性タイプの半導体材料からなる層内に第1の深さまでインプラントするステップと、
前記第1用量のドーパントを拡散ドライブでドライブして、ベース領域を形成するステップと、
前記第1導電性タイプの第2用量のドーパントを、前記ベース領域内に、前記第1の深さより下の第2の深さまでインプラントするステップと、
ソースインプラントを行い、前記ベース領域にソースインプラント領域を得るステップと、
前記ソースインプラント領域と前記第2用量のドーパントとを同時にドライブして、ソース領域と、前記ベース領域内の実質的に一様なドーパント濃度プロファイルとを得るステップとを含む方法。 - 前記第1用量のドーパントを、前記第2用量のドーパントより低いエネルギーでインプラントする、請求項6に記載の方法。
- 前記第1用量が、前記第2用量より多い、請求項6に記載の方法。
- 前記ベース領域が、約0.8〜約1.5μmの深さである、請求項6に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US37818902P | 2002-05-03 | 2002-05-03 | |
US60/378,189 | 2002-05-03 | ||
US10/427,469 | 2003-05-01 | ||
US10/427,469 US7701001B2 (en) | 2002-05-03 | 2003-05-01 | Short channel trench power MOSFET with low threshold voltage |
PCT/US2003/013856 WO2003094204A2 (en) | 2002-05-03 | 2003-05-02 | Short channel trench power mosfet with low threshold voltage |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005524976A JP2005524976A (ja) | 2005-08-18 |
JP5048214B2 true JP5048214B2 (ja) | 2012-10-17 |
Family
ID=29406821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004502331A Expired - Lifetime JP5048214B2 (ja) | 2002-05-03 | 2003-05-02 | 低閾値電圧を有する短チャンネルトレンチパワーmosfet |
Country Status (5)
Country | Link |
---|---|
US (1) | US7701001B2 (ja) |
JP (1) | JP5048214B2 (ja) |
AU (1) | AU2003241353A1 (ja) |
DE (1) | DE10392615T5 (ja) |
WO (1) | WO2003094204A2 (ja) |
Families Citing this family (17)
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DE10214175B4 (de) * | 2002-03-28 | 2006-06-29 | Infineon Technologies Ag | Mittels Feldeffekt steuerbares Halbleiterbauelement und Verfahren zu dessen Herstellung |
JP3939195B2 (ja) * | 2002-05-13 | 2007-07-04 | ローム株式会社 | 半導体装置の製造方法および半導体装置 |
US7161208B2 (en) * | 2002-05-14 | 2007-01-09 | International Rectifier Corporation | Trench mosfet with field relief feature |
US6943426B2 (en) * | 2002-08-14 | 2005-09-13 | Advanced Analogic Technologies, Inc. | Complementary analog bipolar transistors with trench-constrained isolation diffusion |
US8513087B2 (en) * | 2002-08-14 | 2013-08-20 | Advanced Analogic Technologies, Incorporated | Processes for forming isolation structures for integrated circuit devices |
US7825488B2 (en) | 2006-05-31 | 2010-11-02 | Advanced Analogic Technologies, Inc. | Isolation structures for integrated circuits and modular methods of forming the same |
US7250668B2 (en) * | 2005-01-20 | 2007-07-31 | Diodes, Inc. | Integrated circuit including power diode |
US8188539B2 (en) * | 2005-08-10 | 2012-05-29 | Freescale Semiconductor, Inc. | Field-effect semiconductor device and method of forming the same |
JP2008218711A (ja) * | 2007-03-05 | 2008-09-18 | Renesas Technology Corp | 半導体装置およびその製造方法、ならびに電源装置 |
US9048118B2 (en) | 2012-02-13 | 2015-06-02 | Maxpower Semiconductor Inc. | Lateral transistors with low-voltage-drop shunt to body diode |
US9293357B2 (en) * | 2012-07-02 | 2016-03-22 | Texas Instruments Incorporated | Sinker with a reduced width |
US9331197B2 (en) | 2013-08-08 | 2016-05-03 | Cree, Inc. | Vertical power transistor device |
US10868169B2 (en) * | 2013-09-20 | 2020-12-15 | Cree, Inc. | Monolithically integrated vertical power transistor and bypass diode |
US10600903B2 (en) | 2013-09-20 | 2020-03-24 | Cree, Inc. | Semiconductor device including a power transistor device and bypass diode |
US9123805B2 (en) * | 2013-11-14 | 2015-09-01 | Alpha And Omega Semiconductor Incorporated | Method to manufacture short channel trench MOSFET |
JP6115678B1 (ja) * | 2016-02-01 | 2017-04-19 | 富士電機株式会社 | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
JP6776205B2 (ja) * | 2017-09-20 | 2020-10-28 | 株式会社東芝 | 半導体装置の製造方法 |
Family Cites Families (18)
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US5268586A (en) * | 1992-02-25 | 1993-12-07 | North American Philips Corporation | Vertical power MOS device with increased ruggedness and method of fabrication |
US5322802A (en) * | 1993-01-25 | 1994-06-21 | North Carolina State University At Raleigh | Method of fabricating silicon carbide field effect transistor |
DE69429913T2 (de) * | 1994-06-23 | 2002-10-31 | St Microelectronics Srl | Verfahren zur Herstellung eines Leistungsbauteils in MOS-Technik |
US5998837A (en) | 1995-06-02 | 1999-12-07 | Siliconix Incorporated | Trench-gated power MOSFET with protective diode having adjustable breakdown voltage |
KR0175276B1 (ko) | 1996-01-26 | 1999-02-01 | 김광호 | 전력반도체장치 및 그의 제조방법 |
US5897967A (en) * | 1996-08-01 | 1999-04-27 | Sumitomo Metal Industries, Ltd. | Galvannealed steel sheet and manufacturing method thereof |
US5986304A (en) * | 1997-01-13 | 1999-11-16 | Megamos Corporation | Punch-through prevention in trenched DMOS with poly-silicon layer covering trench corners |
JP3262014B2 (ja) * | 1997-02-13 | 2002-03-04 | 日本電気株式会社 | 圧電トランスインバータ装置 |
US5907776A (en) * | 1997-07-11 | 1999-05-25 | Magepower Semiconductor Corp. | Method of forming a semiconductor structure having reduced threshold voltage and high punch-through tolerance |
US6172398B1 (en) * | 1997-08-11 | 2001-01-09 | Magepower Semiconductor Corp. | Trenched DMOS device provided with body-dopant redistribution-compensation region for preventing punch through and adjusting threshold voltage |
JPH11145457A (ja) * | 1997-11-07 | 1999-05-28 | Nec Corp | 縦型電界効果トランジスタ |
US6429481B1 (en) | 1997-11-14 | 2002-08-06 | Fairchild Semiconductor Corporation | Field effect transistor and method of its manufacture |
US6413822B2 (en) | 1999-04-22 | 2002-07-02 | Advanced Analogic Technologies, Inc. | Super-self-aligned fabrication process of trench-gate DMOS with overlying device layer |
US6285060B1 (en) * | 1999-12-30 | 2001-09-04 | Siliconix Incorporated | Barrier accumulation-mode MOSFET |
JP4696335B2 (ja) * | 2000-05-30 | 2011-06-08 | 株式会社デンソー | 半導体装置およびその製造方法 |
JP4750933B2 (ja) | 2000-09-28 | 2011-08-17 | 株式会社東芝 | 薄型パンチスルー型パワーデバイス |
JP4225711B2 (ja) * | 2001-06-29 | 2009-02-18 | 株式会社東芝 | 半導体素子及びその製造方法 |
US6764906B2 (en) | 2001-07-03 | 2004-07-20 | Siliconix Incorporated | Method for making trench mosfet having implanted drain-drift region |
-
2003
- 2003-05-01 US US10/427,469 patent/US7701001B2/en active Active
- 2003-05-02 JP JP2004502331A patent/JP5048214B2/ja not_active Expired - Lifetime
- 2003-05-02 AU AU2003241353A patent/AU2003241353A1/en not_active Abandoned
- 2003-05-02 WO PCT/US2003/013856 patent/WO2003094204A2/en active Application Filing
- 2003-05-02 DE DE10392615T patent/DE10392615T5/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE10392615T5 (de) | 2005-06-30 |
WO2003094204A3 (en) | 2004-04-08 |
AU2003241353A8 (en) | 2003-11-17 |
US7701001B2 (en) | 2010-04-20 |
WO2003094204A2 (en) | 2003-11-13 |
AU2003241353A1 (en) | 2003-11-17 |
US20030214011A1 (en) | 2003-11-20 |
JP2005524976A (ja) | 2005-08-18 |
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