JP4611270B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP4611270B2 JP4611270B2 JP2006262373A JP2006262373A JP4611270B2 JP 4611270 B2 JP4611270 B2 JP 4611270B2 JP 2006262373 A JP2006262373 A JP 2006262373A JP 2006262373 A JP2006262373 A JP 2006262373A JP 4611270 B2 JP4611270 B2 JP 4611270B2
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- 239000004065 semiconductor Substances 0.000 title claims description 68
- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 239000000758 substrate Substances 0.000 claims description 65
- 230000001681 protective effect Effects 0.000 claims description 55
- 238000002955 isolation Methods 0.000 claims description 17
- 238000005268 plasma chemical vapour deposition Methods 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000008021 deposition Effects 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 description 46
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 43
- 229910052710 silicon Inorganic materials 0.000 description 43
- 239000010703 silicon Substances 0.000 description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 40
- 229910052814 silicon oxide Inorganic materials 0.000 description 40
- 238000000206 photolithography Methods 0.000 description 15
- 230000015556 catabolic process Effects 0.000 description 12
- 210000000746 body region Anatomy 0.000 description 9
- 230000005684 electric field Effects 0.000 description 8
- 238000005530 etching Methods 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 6
- 229910052796 boron Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005468 ion implantation Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 238000001039 wet etching Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 241000293849 Cordylanthus Species 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/32—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers using masks
-
- 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
- H01L29/66—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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
- Local Oxidation Of Silicon (AREA)
Description
A. Kitamura, et al., "self-Isolated and High PerformanceComplementary Lateral DMOSFETs with Surrounding-Body Regions" Proceedings ofISPSD, p.42 (1995)
本発明の第1の実施例に係る半導体装置は、ゲートフィールドプレート構造を有する。後に説明するように、ゲート電極の一部が乗り上げているシリコン酸化膜(保護絶縁)がLOCOS酸化法以外の方法によって形成され、シリコン基板表面の平坦性が保たれている。さらに、シリコン酸化膜(保護絶縁膜)の端部の傾斜が緩く、ゲート電極下の酸化膜厚が急激に変化しないことを特徴とする。
本発明の第2の実施例に係る半導体装置は、上述した第1の実施例と同様にゲートフィールドプレート構造を有する。後に説明するように、ゲート電極の一部が乗り上げているシリコン酸化膜(保護絶縁膜)がLOCOS酸化法以外の方法によって形成され、シリコン基板表面の平坦性が保たれている。さらに、シリコン酸化膜(保護絶縁膜)の端部の傾斜が緩く、ゲート電極下の酸化膜厚が急激に変化しないことを特徴とする。
本発明の第3実施例に係る半導体装置は、上述した第1、第2の実施例と同様にゲートフィールドプレート構造を有する。後に説明するように、ゲート電極の一部が乗り上げているシリコン酸化膜がLOCOS酸化法により形成されるが、他の素子分離のためのフィールド酸化膜よりも薄くなっている。このため、従来の構造に比べてシリコン基板表面の平坦性が保たれている。さらに、シリコン酸化膜(保護絶縁膜)の端部の傾斜が緩く、ゲート電極下の酸化膜厚が急激に変化しないことを特徴とする。
また、一度のフォトリソグラフィー工程により異なる膜厚を有するフィールド酸化膜(322,322a)を形成することができるため、製造コストの増大を抑制することができる。
114 溝
116a,212a シリコン酸化膜(保護絶縁膜)
122,222,322 LOCOS酸化膜(素子分離領域)
124,224,324 ゲート酸化膜
126,226,326 ゲート電極
322a LOCOS酸化膜(保護絶縁膜)
Claims (5)
- 表面に保護絶縁膜形成領域を備えた半導体基板を準備する工程と、
前記保護絶縁膜形成領域の周囲の前記半導体基板の表面に溝を形成する工程と、
前記溝を形成した後に、前記保護絶縁膜形成領域上に高密度プラズマCVD法によって絶縁膜を堆積してテーパー形状の保護絶縁膜を形成する工程と、
前記溝を前記半導体基板と同一導電型の半導体層で埋め込む工程と、
前記半導体層の表面に、前記保護絶縁膜に接続され前記半導体層の表面からの膜厚が前記保護絶縁膜よりも薄いゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上及び前記保護絶縁膜上に跨るゲート電極を形成する工程と、を有することを特徴とする半導体装置の製造方法。 - 前記高密度プラズマCVD法による処理において、プラズマ処理チャンバー側に掛かるデポジションパワー(A)と、処理基板側に掛かるスパッタパワー(B)との比(A:B)を、約4:3とすることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記ゲート電極形成後に、前記半導体層にイオン注入を行いソース層及びドレイン層を形成する工程を有することを特徴とする請求項1又は2に記載の半導体装置の製造方法。
- 前記ソース層、前記ドレイン層、及び前記ゲート電極を含む半導体素子を他の半導体素子形成領域と絶縁する素子分離層を形成することを特徴とする請求項3に記載の半導体装置の製造方法。
- 表面に保護絶縁膜形成領域を備えた半導体基板を準備する工程と、
前記保護絶縁膜形成領域の周囲の前記半導体基板の表面に溝を形成する工程と、
前記溝を形成した後に、前記保護絶縁膜形成領域上及び前記溝の底面に高密度プラズマCVD法によって絶縁膜を堆積してテーパー形状の保護絶縁膜を形成する工程と、
前記溝の底面に形成された前記絶縁膜を除去する工程と、
前記溝を前記半導体基板と同一導電型の半導体層で埋め込む工程と、
前記半導体層の表面に、前記保護絶縁膜に接続され前記半導体層の表面からの膜厚が前記保護絶縁膜よりも薄いゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜上及び前記保護絶縁膜上に跨るゲート電極を形成する工程と、を有することを特徴とする半導体装置の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006262373A JP4611270B2 (ja) | 2006-09-27 | 2006-09-27 | 半導体装置の製造方法 |
US11/892,729 US20080073746A1 (en) | 2006-09-27 | 2007-08-27 | Semiconductor device |
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JP2006262373A JP4611270B2 (ja) | 2006-09-27 | 2006-09-27 | 半導体装置の製造方法 |
Related Child Applications (1)
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JP2009169715A Division JP4657356B2 (ja) | 2009-07-21 | 2009-07-21 | 半導体装置の製造方法 |
Publications (2)
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JP2008085031A JP2008085031A (ja) | 2008-04-10 |
JP4611270B2 true JP4611270B2 (ja) | 2011-01-12 |
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JP2006262373A Expired - Fee Related JP4611270B2 (ja) | 2006-09-27 | 2006-09-27 | 半導体装置の製造方法 |
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US (1) | US20080073746A1 (ja) |
JP (1) | JP4611270B2 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5388500B2 (ja) * | 2007-08-30 | 2014-01-15 | 株式会社半導体エネルギー研究所 | 半導体装置の作製方法 |
JP5371358B2 (ja) * | 2008-09-29 | 2013-12-18 | ローム株式会社 | 半導体装置および半導体装置の製造方法 |
US9484454B2 (en) | 2008-10-29 | 2016-11-01 | Tower Semiconductor Ltd. | Double-resurf LDMOS with drift and PSURF implants self-aligned to a stacked gate “bump” structure |
US9330979B2 (en) * | 2008-10-29 | 2016-05-03 | Tower Semiconductor Ltd. | LDMOS transistor having elevated field oxide bumps and method of making same |
DE102011087845B4 (de) * | 2011-12-06 | 2015-07-02 | Infineon Technologies Ag | Laterales transistorbauelement und verfahren zu dessen herstellung |
US9136349B2 (en) * | 2012-01-06 | 2015-09-15 | Taiwan Semiconductor Manufacturing Company, Ltd. | Dummy gate structure for semiconductor devices |
US8878275B2 (en) | 2013-02-18 | 2014-11-04 | Fairchild Semiconductor Corporation | LDMOS device with double-sloped field plate |
JP6229646B2 (ja) * | 2013-12-20 | 2017-11-15 | 株式会社デンソー | 半導体装置 |
CN105374686A (zh) * | 2014-09-02 | 2016-03-02 | 无锡华润上华半导体有限公司 | 一种ldmos器件的制作方法 |
US10014408B1 (en) * | 2017-05-30 | 2018-07-03 | Vanguard International Semiconductor Corporation | Semiconductor devices and methods for forming the same |
DE102020117171A1 (de) | 2020-06-30 | 2021-12-30 | Infineon Technologies Dresden GmbH & Co. KG | Lateral-transistor mit selbstausrichtendem body-implantat |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01274457A (ja) * | 1988-04-26 | 1989-11-02 | Seiko Instr Inc | 半導体装置の製造方法 |
JPH01293668A (ja) * | 1988-05-23 | 1989-11-27 | Seiko Instr Inc | 絶縁ゲート電界効果トランジスタの製造方法 |
JPH0582783A (ja) * | 1991-03-22 | 1993-04-02 | Philips Gloeilampenfab:Nv | ラテラル絶縁ゲート電界効果半導体装置 |
JPH06232156A (ja) * | 1993-01-29 | 1994-08-19 | Ricoh Co Ltd | 半導体装置とその製造方法 |
JP2002176173A (ja) * | 2000-12-07 | 2002-06-21 | Sanyo Electric Co Ltd | 半導体装置とその製造方法 |
JP2002314065A (ja) * | 2001-04-13 | 2002-10-25 | Sanyo Electric Co Ltd | Mos半導体装置およびその製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5072267A (en) * | 1989-06-28 | 1991-12-10 | Nec Corporation | Complementary field effect transistor |
JP3206026B2 (ja) * | 1991-07-19 | 2001-09-04 | 富士電機株式会社 | 高電圧用misfetを備える半導体装置 |
JP3000739B2 (ja) * | 1991-08-22 | 2000-01-17 | 日本電気株式会社 | 縦型mos電界効果トランジスタおよびその製造方法 |
JP3673231B2 (ja) * | 2002-03-07 | 2005-07-20 | 三菱電機株式会社 | 絶縁ゲート型半導体装置及びゲート配線構造の製造方法 |
US7719054B2 (en) * | 2006-05-31 | 2010-05-18 | Advanced Analogic Technologies, Inc. | High-voltage lateral DMOS device |
-
2006
- 2006-09-27 JP JP2006262373A patent/JP4611270B2/ja not_active Expired - Fee Related
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2007
- 2007-08-27 US US11/892,729 patent/US20080073746A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01274457A (ja) * | 1988-04-26 | 1989-11-02 | Seiko Instr Inc | 半導体装置の製造方法 |
JPH01293668A (ja) * | 1988-05-23 | 1989-11-27 | Seiko Instr Inc | 絶縁ゲート電界効果トランジスタの製造方法 |
JPH0582783A (ja) * | 1991-03-22 | 1993-04-02 | Philips Gloeilampenfab:Nv | ラテラル絶縁ゲート電界効果半導体装置 |
JPH06232156A (ja) * | 1993-01-29 | 1994-08-19 | Ricoh Co Ltd | 半導体装置とその製造方法 |
JP2002176173A (ja) * | 2000-12-07 | 2002-06-21 | Sanyo Electric Co Ltd | 半導体装置とその製造方法 |
JP2002314065A (ja) * | 2001-04-13 | 2002-10-25 | Sanyo Electric Co Ltd | Mos半導体装置およびその製造方法 |
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