KR100685575B1 - 반도체 소자의 스텝 채널 형성 방법 - Google Patents
반도체 소자의 스텝 채널 형성 방법 Download PDFInfo
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- KR100685575B1 KR100685575B1 KR1020040113864A KR20040113864A KR100685575B1 KR 100685575 B1 KR100685575 B1 KR 100685575B1 KR 1020040113864 A KR1020040113864 A KR 1020040113864A KR 20040113864 A KR20040113864 A KR 20040113864A KR 100685575 B1 KR100685575 B1 KR 100685575B1
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- Prior art keywords
- hard mask
- mask layer
- step channel
- semiconductor substrate
- forming
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 125000006850 spacer group Chemical group 0.000 claims abstract description 21
- 238000005530 etching Methods 0.000 claims description 14
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 5
- 229920005591 polysilicon Polymers 0.000 claims description 5
- 238000001039 wet etching Methods 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 238000001312 dry etching Methods 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 2
- 239000005380 borophosphosilicate glass Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229920002120 photoresistant polymer Polymers 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
-
- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3085—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by their behaviour during the process, e.g. soluble masks, redeposited 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
- H01L29/66545—Unipolar field-effect transistors with an insulated gate, i.e. MISFET using a dummy, i.e. replacement gate in a process wherein at least a part of the final gate is self aligned to the dummy gate
-
- 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
- H01L29/66568—Lateral single gate silicon transistors
- H01L29/66636—Lateral single gate silicon transistors with source or drain recessed by etching or first recessed by etching and then refilled
-
- 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
- H01L29/7833—Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's
- H01L29/7834—Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's with a non-planar structure, e.g. the gate or the source or the drain being non-planar
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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)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Drying Of Semiconductors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
Description
반도체 기판 상부에 스텝 채널용 하드 마스크층을 형성하는 단계;
상기 하드 마스크층 측벽에 스페이서를 형성하는 단계; 및
상기 하드 마스크층, 스페이서 및 반도체 기판을 동시에 식각하여 상기 반도체 기판 상부의 구조물을 제거하며 스텝 채널을 형성하는 단계;
Claims (10)
- 반도체 기판 상부에 스텝 채널용 하드 마스크층을 형성하는 단계;상기 하드 마스크층 측벽에 스페이서를 형성하는 단계; 및상기 하드 마스크층, 스페이서 및 반도체 기판을 동시에 식각하여 상기 반도체 기판 상부의 구조물을 제거하며 스텝 채널을 형성하는 단계;를 포함하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 1 항에 있어서,상기 하드 마스크층은 질화막, 폴리실리콘층, W, Ti 또는 TiN을 사용하여 형성하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 1 항에 있어서,상기 하드 마스크층은 스텝 채널의 식각 깊이와 동일한 크기의 두께로 형성하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성방법.
- 제 1 항에 있어서,상기 스페이서는 폴리실리콘 또는 산화막으로 형성하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 1 항에 있어서,상기 하드마스크층, 스페이서 및 반도체 기판을 식각하는 공정은 동일한 식각선택비를 가지는 건식 식각으로 수행하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 1 항에 있어서,상기 하드마스크층, 스페이서 및 반도체 기판을 식각하는 공정 후 남은 하드 마스크층은 습식 식각으로 제거하는 단계를 더 포함하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 1 항에 있어서,상기 하드 마스크층 형성 전에 반도체 기판 표면에 식각 정지 산화막을 형성하는 단계와, 상기 하드 마스크층 패턴 제거 후 식각 정지 산화막을 제거하는 단계를 더 포함하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 7 항에 있어서,상기 식각 정지 산화막은 HTO, TEOS, USG 또는 BPSG를 사용하여 형성하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 7 항에 있어서,상기 식각 정지 산화막은 상기 하드 마스크층 및 반도체 기판과 식각 선택비 차이를 갖는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
- 제 7 항에 있어서,상기 식각 정지 산화막은 습식 식각으로 제거하는 것을 특징으로 하는 반도체 소자의 스텝 채널 형성 방법.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020040113864A KR100685575B1 (ko) | 2004-12-28 | 2004-12-28 | 반도체 소자의 스텝 채널 형성 방법 |
US11/148,558 US7309656B2 (en) | 2004-12-28 | 2005-06-09 | Method for forming step channel of semiconductor device |
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KR1020040113864A KR100685575B1 (ko) | 2004-12-28 | 2004-12-28 | 반도체 소자의 스텝 채널 형성 방법 |
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KR20060074748A KR20060074748A (ko) | 2006-07-03 |
KR100685575B1 true KR100685575B1 (ko) | 2007-02-22 |
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KR1020040113864A KR100685575B1 (ko) | 2004-12-28 | 2004-12-28 | 반도체 소자의 스텝 채널 형성 방법 |
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KR (1) | KR100685575B1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5751040A (en) | 1996-09-16 | 1998-05-12 | Taiwan Semiconductor Manufacturing Company Ltd. | Self-aligned source/drain mask ROM memory cell using trench etched channel |
KR20010037863A (ko) * | 1999-10-20 | 2001-05-15 | 박종섭 | 플래시 메모리 소자의 제조방법 |
KR20040044205A (ko) * | 2002-11-19 | 2004-05-28 | 삼성전자주식회사 | 소오스/드레인을 감싸는 확산방지막을 구비하는 반도체소자 및 그 형성 방법 |
US6753242B2 (en) | 2002-03-19 | 2004-06-22 | Motorola, Inc. | Integrated circuit device and method therefor |
JP2004186185A (ja) | 2002-11-29 | 2004-07-02 | Toshiba Corp | 半導体装置及びその製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5908313A (en) * | 1996-12-31 | 1999-06-01 | Intel Corporation | Method of forming a transistor |
KR100307636B1 (ko) * | 1999-10-07 | 2001-11-02 | 윤종용 | 올라간 구조의 소오스/드레인을 갖는 전계효과 트랜지스터 및 그 제조방법 |
US6756633B2 (en) * | 2001-12-27 | 2004-06-29 | Silicon Storage Technology, Inc. | Semiconductor memory array of floating gate memory cells with horizontally oriented floating gate edges |
US7118952B2 (en) * | 2004-07-14 | 2006-10-10 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method of making transistor with strained source/drain |
US7381615B2 (en) * | 2004-11-23 | 2008-06-03 | Sandisk Corporation | Methods for self-aligned trench filling with grown dielectric for high coupling ratio in semiconductor devices |
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2004
- 2004-12-28 KR KR1020040113864A patent/KR100685575B1/ko active IP Right Grant
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- 2005-06-09 US US11/148,558 patent/US7309656B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5751040A (en) | 1996-09-16 | 1998-05-12 | Taiwan Semiconductor Manufacturing Company Ltd. | Self-aligned source/drain mask ROM memory cell using trench etched channel |
KR20010037863A (ko) * | 1999-10-20 | 2001-05-15 | 박종섭 | 플래시 메모리 소자의 제조방법 |
US6753242B2 (en) | 2002-03-19 | 2004-06-22 | Motorola, Inc. | Integrated circuit device and method therefor |
KR20040044205A (ko) * | 2002-11-19 | 2004-05-28 | 삼성전자주식회사 | 소오스/드레인을 감싸는 확산방지막을 구비하는 반도체소자 및 그 형성 방법 |
JP2004186185A (ja) | 2002-11-29 | 2004-07-02 | Toshiba Corp | 半導体装置及びその製造方法 |
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Publication number | Publication date |
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US20060141800A1 (en) | 2006-06-29 |
US7309656B2 (en) | 2007-12-18 |
KR20060074748A (ko) | 2006-07-03 |
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