JP2008010627A - 半導体装置及びその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 title claims description 39
- 238000009792 diffusion process Methods 0.000 claims abstract description 184
- 239000012535 impurity Substances 0.000 claims abstract description 81
- WNUPENMBHHEARK-UHFFFAOYSA-N silicon tungsten Chemical compound [Si].[W] WNUPENMBHHEARK-UHFFFAOYSA-N 0.000 claims description 23
- 230000001133 acceleration Effects 0.000 claims description 21
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 19
- 229920005591 polysilicon Polymers 0.000 claims description 19
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000005468 ion implantation Methods 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 abstract description 21
- 239000010410 layer Substances 0.000 description 194
- 239000000758 substrate Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 18
- 229920002120 photoresistant polymer Polymers 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 229910052814 silicon oxide Inorganic materials 0.000 description 15
- 238000000206 photolithography Methods 0.000 description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 7
- 229910052796 boron Inorganic materials 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 2
- 229910018182 Al—Cu Inorganic materials 0.000 description 2
- 229910018520 Al—Si Inorganic materials 0.000 description 2
- 229910018594 Si-Cu Inorganic materials 0.000 description 2
- 229910008465 Si—Cu Inorganic materials 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005360 phosphosilicate glass Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- 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
- H01L29/7816—Lateral DMOS transistors, i.e. LDMOS 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
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- 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
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66674—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/66681—Lateral DMOS transistors, i.e. LDMOS 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
- H01L29/107—Substrate region of field-effect devices
- H01L29/1075—Substrate region of field-effect devices of field-effect transistors
- H01L29/1079—Substrate region of field-effect devices of field-effect transistors with insulated gate
- H01L29/1083—Substrate region of field-effect devices of field-effect transistors with insulated gate with an inactive supplementary region, e.g. for preventing punch-through, improving capacity effect or leakage current
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- 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
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42364—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity
- H01L29/42368—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the insulating layer, e.g. thickness or uniformity the thickness being non-uniform
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- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
【解決手段】本発明の半導体装置では、N型のエピタキシャル層3にP型の拡散層5が形成されている。P型の拡散層5には、バックゲート領域としてのN型の拡散層8が形成されている。N型の拡散層8は、ドレイン電極12、13を用いたセルファラインにより形成される。この構造により、ソース領域としてのP型の拡散層10、11近傍のN型の拡散層8の不純物濃度を高濃度とすることができる。そして、ドレイン−ソース間のパンチスルー耐圧を向上させ、MOSトランジスタ1の所望の耐圧特性を実現できる。
【選択図】図1
Description
2 P型の単結晶シリコン基板
3 N型のエピタキシャル層
5 P型の拡散層
8 N型の拡散層
10 P型の拡散層
11 P型の拡散層
12 ゲート電極
13 ゲート電極
15 ポリシリコン膜
16 タングステンシリコン膜
Claims (6)
- 半導体層と、前記半導体層に形成されるドレイン領域、ソース領域及びバックゲート領域と、前記半導体層上面に形成されるゲート酸化膜と、前記ゲート酸化膜上に形成されるゲート電極とを有する半導体装置において、
前記半導体層には、前記ドレイン領域及び前記バックゲート領域の形成領域に渡り一導電型の第1の拡散層が形成され、
前記一導電型の第1の拡散層には、前記バックゲート領域を構成する逆導電型の拡散層が形成され、
前記逆導電型の拡散層には、前記ソース領域を構成する一導電型の第2の拡散層が形成され、
前記逆導電型の拡散層の不純物濃度ピークは、前記逆導電型の拡散層と前記一導電型の第2の拡散層との接合領域よりも前記一導電型の第1の拡散層の深部に形成されていることを特徴とする半導体装置。 - 前記接合領域近傍の前記逆導電型の拡散層の不純物濃度では、前記一導電型の第2の拡散層底面近傍の不純物濃度が、前記一導電型の第2の拡散層の表面近傍の不純物濃度に対し0.8倍以上であることを特徴とする請求項1に記載の半導体装置。
- 前記ゲート電極は、ポリシリコン膜とタングステンシリコン膜とから形成され、前記タングステンシリコン膜の膜厚は前記ポリシリコン膜の膜厚よりも厚いことを特徴とする請求項1に記載の半導体装置。
- 半導体層に一導電型の第1の拡散層を形成し、前記半導体層上にゲート酸化膜及びゲート電極を形成した後、前記ゲート電極を用いたセルファラインにより、前記一導電型の第1の拡散層にバックゲート領域を構成する逆導電型の拡散層を形成する工程と、
前記逆導電型の拡散層に重畳するようにソース領域を構成する一導電型の第2の拡散層を形成し、前記一導電型の第1の拡散層にドレイン領域を構成する一導電型の第3の拡散層を形成する工程とを有し、
前記逆導電型の拡散層を形成する工程では、前記逆導電型の拡散層の不純物濃度のピークを前記逆導電型の拡散層と前記一導電型の第2の拡散層との接合領域よりも前記一導電型の第1の拡散層の深部に形成することを特徴とする半導体装置の製造方法。 - 前記逆導電型の拡散層を形成する工程では、加速電圧が80〜160(keV)のイオン注入工程を有することを特徴とする請求項4に記載の半導体装置の製造方法。
- 前記ゲート電極を形成する工程では、ポリシリコン膜上にタングステンシリコン膜を堆積させ、前記タングステンシリコン膜の膜厚を前記ポリシリコン膜の膜厚よりも厚くすることを特徴とする請求項4に記載の半導体装置の製造方法。
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JP2006179389A JP2008010627A (ja) | 2006-06-29 | 2006-06-29 | 半導体装置及びその製造方法 |
US11/770,238 US7547950B2 (en) | 2006-06-29 | 2007-06-28 | Semiconductor device and method of manufacturing the same |
CNA2007101263485A CN101097960A (zh) | 2006-06-29 | 2007-06-29 | 半导体装置及其制造方法 |
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US9831305B1 (en) * | 2016-05-06 | 2017-11-28 | Vanguard International Semiconductor Corporation | Semiconductor device and method for manufacturing the same |
CN107482003B (zh) * | 2016-06-08 | 2020-03-13 | 中芯国际集成电路制造(上海)有限公司 | 晶体管的版图结构、晶体管及其制造方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08264772A (ja) * | 1995-03-23 | 1996-10-11 | Toyota Motor Corp | 電界効果型半導体素子 |
JPH09232563A (ja) * | 1996-02-21 | 1997-09-05 | Nec Kansai Ltd | 電界効果トランジスタ |
JPH09320982A (ja) * | 1996-05-30 | 1997-12-12 | Hitachi Ltd | 半導体集積回路装置の製造方法およびその製造装置 |
JPH11145457A (ja) * | 1997-11-07 | 1999-05-28 | Nec Corp | 縦型電界効果トランジスタ |
JP2000188391A (ja) * | 1997-12-24 | 2000-07-04 | Seiko Instruments Inc | 半導体集積回路装置の製造方法 |
JP2002141502A (ja) * | 2000-11-02 | 2002-05-17 | Rohm Co Ltd | 半導体装置およびその製造方法 |
JP2006032493A (ja) * | 2004-07-13 | 2006-02-02 | Sharp Corp | 半導体装置及びその製造方法 |
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US5719421A (en) | 1994-10-13 | 1998-02-17 | Texas Instruments Incorporated | DMOS transistor with low on-resistance and method of fabrication |
CN1156904C (zh) * | 1996-03-06 | 2004-07-07 | 皇家菲利浦电子有限公司 | 制造pic(功率集成电路)器件的方法以及这种方法制造的pic器件 |
JP2000077532A (ja) * | 1998-09-03 | 2000-03-14 | Mitsubishi Electric Corp | 半導体装置およびその製造方法 |
JP3443069B2 (ja) | 2000-04-07 | 2003-09-02 | 松下電器産業株式会社 | 半導体装置の製造方法 |
JP2006128640A (ja) | 2004-09-30 | 2006-05-18 | Sanyo Electric Co Ltd | 半導体装置及びその製造方法 |
JP4413742B2 (ja) * | 2004-10-14 | 2010-02-10 | パナソニック株式会社 | Mos容量型半導体装置およびこれを用いた水晶発振器 |
JP5063865B2 (ja) * | 2005-03-30 | 2012-10-31 | オンセミコンダクター・トレーディング・リミテッド | 半導体装置 |
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- 2007-06-28 US US11/770,238 patent/US7547950B2/en active Active
- 2007-06-29 CN CNA2007101263485A patent/CN101097960A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08264772A (ja) * | 1995-03-23 | 1996-10-11 | Toyota Motor Corp | 電界効果型半導体素子 |
JPH09232563A (ja) * | 1996-02-21 | 1997-09-05 | Nec Kansai Ltd | 電界効果トランジスタ |
JPH09320982A (ja) * | 1996-05-30 | 1997-12-12 | Hitachi Ltd | 半導体集積回路装置の製造方法およびその製造装置 |
JPH11145457A (ja) * | 1997-11-07 | 1999-05-28 | Nec Corp | 縦型電界効果トランジスタ |
JP2000188391A (ja) * | 1997-12-24 | 2000-07-04 | Seiko Instruments Inc | 半導体集積回路装置の製造方法 |
JP2002141502A (ja) * | 2000-11-02 | 2002-05-17 | Rohm Co Ltd | 半導体装置およびその製造方法 |
JP2006032493A (ja) * | 2004-07-13 | 2006-02-02 | Sharp Corp | 半導体装置及びその製造方法 |
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CN101097960A (zh) | 2008-01-02 |
US7547950B2 (en) | 2009-06-16 |
US20080001231A1 (en) | 2008-01-03 |
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