KR940012493A - 집적 회로 제조 방법 - Google Patents

집적 회로 제조 방법 Download PDF

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KR940012493A
KR940012493A KR1019930023780A KR930023780A KR940012493A KR 940012493 A KR940012493 A KR 940012493A KR 1019930023780 A KR1019930023780 A KR 1019930023780A KR 930023780 A KR930023780 A KR 930023780A KR 940012493 A KR940012493 A KR 940012493A
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insulator
substrate
gate
gates
portions
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KR1019930023780A
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쿠오-후아 리
춘-팅 류
죠오지 스타이너 커트
첸-후아 더글라스 유
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제이. 티. 레버그
아메리칸 텔리폰 앤드 텔레그라프 캄파니
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Publication of KR940012493A publication Critical patent/KR940012493A/ko

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    • H—ELECTRICITY
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    • H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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    • 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
    • H01L29/66492—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a pocket or a lightly doped drain selectively formed at the side of the gate
    • 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
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    • H01L21/02107—Forming insulating materials on a substrate
    • H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
    • H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
    • H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
    • H01L21/02126—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
    • H01L21/02131—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC the material being halogen doped silicon oxides, e.g. FSG
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    • H01L21/02107—Forming insulating materials on a substrate
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    • H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
    • H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
    • H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
    • H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
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    • 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
    • H01L21/314—Inorganic layers
    • H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
    • H01L21/31604—Deposition from a gas or vapour
    • H01L21/31608—Deposition of SiO2
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    • 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
    • H01L21/314—Inorganic layers
    • H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
    • H01L21/31604—Deposition from a gas or vapour
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    • H01L29/1025—Channel region of field-effect devices
    • H01L29/1029—Channel region of field-effect devices of field-effect transistors
    • H01L29/1033—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure
    • H01L29/1041—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure with a non-uniform doping structure in the channel region surface
    • H01L29/1045—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure with a non-uniform doping structure in the channel region surface the doping structure being parallel to the channel length, e.g. DMOS like
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    • 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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    • 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
    • H01L29/66575—Lateral single gate silicon transistors where the source and drain or source and drain extensions are self-aligned to the sides of the gate
    • H01L29/6659—Lateral single gate silicon transistors where the source and drain or source and drain extensions are self-aligned to the sides of the gate with both lightly doped source and drain extensions and source and drain self-aligned to the sides of the gate, e.g. lightly doped drain [LDD] MOSFET, double diffused drain [DDD] MOSFET
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
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    • 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

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)
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  • Formation Of Insulating Films (AREA)
  • Element Separation (AREA)
  • Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)

Abstract

펀치스루 제어 주입부(37,39)를 형성하는 기술을 포함하는 반도체 집적회로 제조방법을 설명한다. 게이트(13,15)형성후, 게이트(13,15)와 반도체 기판(11)의 노출부를 덮는 절연체(17)가 형성된다. 절연체는 게이트의 상단과 노출된 기판에 인접한 절연체의 그 부분들보다는 게이트 측벽에 인접한 절연체의 그 부분을 습식 에칭에 더욱상처를 입기 쉽도록 만드는 공정에 의하여 형성된다. 다음에 절연체는 기판을 노출시키며 이온 주입 비임을 클리메이트 하는데 사용된 채널(29,31)을 게이트에 인접하게 형성하도록 후속하여 에칭된다. 다음에 절연체의 나머지부분이 제거되고, 종래 과정을 이용하여 소스(45) 및 드레인(47)을 형성한다. 실예에서, 절연체는 NF3을 증착 종정중에 첨가하는 TEOS에서 형성된다. NF3의 첨가는 게이트 측벽에 인접하게 형성하는 절연체의 그 부분을 불화수소산에 에칭에 특히 상처를 입기 쉽도록 만들고, 반면에 기판과 게이트(13,15)를 덮는 절연체의 그 부분들은 그렇게 상처를 입지 않는다.

Description

집적 회로 제조 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도, 제2도 및 제3도는 본 발명의 실시예를 개략적으로 도시하는 부분적으로 제조된 집적 회로의 단면도.

Claims (5)

  1. 반도체 집적 회로 제조 방법에 있어서, 기판(11)의 일부분을 덮으면서 동시에 기판에 대해 대체로 수직인 측면(23,25)을 갖는 게이트(13,15)를 형성하는 단계와, 기판(11)의 다른 부분(19,21)들을 노출시키는 단계와, 게이트(13,15)와 기판의 노출부(23,25)위에 블랫킹 절연체 층(17)을 형성하는 단계와, 게이트의 상단에 절연체의 일부분(18)을 남아있게 허용하면서 동시에 게이트(13,15)의 측면(23,25)에서 절연체를 제거하도록 절연체(17)를 에칭하는 단계와, 상기 에칭 단계에서 기판(11)에서 절연체(17)의 일부분을 제거하는 단계와, 기판(11)을 도펀트 종류에 노출시키는 단계를 구비하는 것을 특징으로 하는 제조 방법.
  2. 제1항에 있어서, 블랫킹 절연체(17)는 TEOS와 NF3를 이용하는 반응장치에서 형성되는 것을 특징으로 하는 제조방법.
  3. 제1항에 있어서, 상기 에칭 단계는 불화수소산을 이용하는 것을 특징으로 하는 제조 방법.
  4. 제1항에 있어서, 도펀트에 기판(11)의 노출 단계는 붕소이온의 주입 단계로 이루어지는 것을 특징으로 하는 제조 방법.
  5. 제1항에 있어서, 도펀트 종류에 기판(11)을 노출시킨 후 절연체의 나머지 부분은 제거되는 것을 특징으로 하는 제조 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930023780A 1992-11-13 1993-11-10 집적 회로 제조 방법 KR940012493A (ko)

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US976,049 1992-11-13

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0144493B1 (ko) * 1995-05-22 1998-08-17 김주용 불순물 접합 영역 형성방법
US6037230A (en) * 1997-06-03 2000-03-14 Texas Instruments Incorporated Method to reduce diode capacitance of short-channel MOSFETS
US6221724B1 (en) 1998-11-06 2001-04-24 Advanced Micro Devices, Inc. Method of fabricating an integrated circuit having punch-through suppression
GB2362030A (en) * 1999-11-12 2001-11-07 Lucent Technologies Inc Method of fabricating a halo structure in an integrated circuit for reduced size transistors
US6306715B1 (en) * 2001-01-08 2001-10-23 Chartered Semiconductor Manufacturing Ltd. Method to form smaller channel with CMOS device by isotropic etching of the gate materials
US6509221B1 (en) 2001-11-15 2003-01-21 International Business Machines Corporation Method for forming high performance CMOS devices with elevated sidewall spacers
DE102006009226B9 (de) * 2006-02-28 2011-03-10 Advanced Micro Devices, Inc., Sunnyvale Verfahren zum Herstellen eines Transistors mit einer erhöhten Schwellwertstabilität ohne Durchlass-Strombeeinträchtigung und Transistor
CN112053948A (zh) * 2020-08-31 2020-12-08 上海华虹宏力半导体制造有限公司 氧化膜的工艺方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198250A (en) * 1979-02-05 1980-04-15 Intel Corporation Shadow masking process for forming source and drain regions for field-effect transistors and like regions
US4330931A (en) * 1981-02-03 1982-05-25 Intel Corporation Process for forming metal plated regions and lines in MOS circuits
JPS57204148A (en) * 1981-06-10 1982-12-14 Toshiba Corp Manufacture of semiconductor device
JPS58219765A (ja) * 1982-06-15 1983-12-21 Oki Electric Ind Co Ltd 半導体集積回路の製造方法
JPS5919349A (ja) * 1982-07-26 1984-01-31 Toshiba Corp 半導体装置およびその製造方法
JPS60121765A (ja) * 1983-12-06 1985-06-29 Toshiba Corp Ｍｉｓ型半導体装置の製造方法
JPS60138971A (ja) * 1983-12-27 1985-07-23 Toshiba Corp 半導体装置の製造方法
JPS60263468A (ja) * 1984-06-12 1985-12-26 Toshiba Corp 半導体装置の製造方法
JPS62163374A (ja) * 1986-01-14 1987-07-20 Toshiba Corp 半導体装置の製造方法
JPS6384159A (ja) * 1986-09-29 1988-04-14 Nec Corp 半導体装置の製造方法
JPS63150968A (ja) * 1986-12-15 1988-06-23 Toshiba Corp Ｍｏｓ型半導体装置の製造方法
JPS63261755A (ja) * 1987-04-18 1988-10-28 Nippon Denso Co Ltd Ｆｅｔ素子の製造方法
US5013691A (en) * 1989-07-31 1991-05-07 At&T Bell Laboratories Anisotropic deposition of silicon dioxide
JPH0395936A (ja) * 1989-09-07 1991-04-22 Fujitsu Ltd 半導体装置の製造方法

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EP0607658A3 (en) 1995-08-30
US5416033A (en) 1995-05-16
JPH06209105A (ja) 1994-07-26

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