KR960005896A - 박막트랜지스터 제조방법 - Google Patents

박막트랜지스터 제조방법 Download PDF

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KR960005896A
KR960005896A KR1019940017688A KR19940017688A KR960005896A KR 960005896 A KR960005896 A KR 960005896A KR 1019940017688 A KR1019940017688 A KR 1019940017688A KR 19940017688 A KR19940017688 A KR 19940017688A KR 960005896 A KR960005896 A KR 960005896A
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gate electrode
insulating film
forming
polysilicon layer
ion implantation
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KR1019940017688A
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KR0132490B1 (ko
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김인
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문정환
금성일렉트론 주식회사
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Priority to US08/504,688 priority patent/US5547883A/en
Priority to JP7206730A priority patent/JP2707433B2/ja
Publication of KR960005896A publication Critical patent/KR960005896A/ko
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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
    • H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
    • H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
    • 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
    • H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
    • H01L29/78651—Silicon transistors
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    • H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
    • H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
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    • 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
    • H01L29/42384—Gate electrodes for field effect devices for field-effect transistors with insulated gate for thin film field effect transistors, e.g. characterised by the thickness or the shape of the insulator or the dimensions, the shape or the lay-out of the conductor
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    • 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
    • H01L29/66742—Thin film unipolar transistors
    • H01L29/6675—Amorphous silicon or polysilicon transistors
    • H01L29/66765—Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the gate
    • H—ELECTRICITY
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    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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    • 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
    • H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
    • H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
    • H01L29/78618—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure
    • H01L29/78621—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure with LDD structure or an extension or an offset region or characterised by the doping profile
    • H01L29/78624—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure with LDD structure or an extension or an offset region or characterised by the doping profile the source and the drain regions being asymmetrical
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    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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    • 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
    • H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
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    • H10B10/125—Static random access memory [SRAM] devices comprising a MOSFET load element the MOSFET being a thin film transistor [TFT]
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  • Engineering & Computer Science (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Thin Film Transistor (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)

Abstract

본 발명은 박막트랜지스터 제조방법에 관한 것으로, 박막트랜지스터의 채널길이를 증가시키고 오프셋영역과 소오스 및 드레인영역을 셀프얼라인 형성시키기 위한 것이다.
본 발명은 기판상에 형성된 절연막상부에 게이트전극을 형성하는 공정과, 상기 게이트전극의 양측 하부의 상기 절연막을 언더컷하는 공정, 게이트전극 전표면에 게이트절연막을 형성하는 공정, 결과물 전면에 바디실리콘층을 형성하는 공정, 상기 바디폴리실리콘층에 저농도 이온주입을 행하는 공정, 및 상기 바디폴리실리콘층에 소정의 각도로 경사 이온주입을 고농도로 행하는 공정을 포함하여 이루어진 박막트랜지스터 제조방법을 제공한다.

Description

박막트랜지스터 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제3도는 본 발명의 일실시예에 의한 박막트랜지스터 제조방법을 도시한 공정순서도.
제4도는 본 발명의 다른 실시예에 의한 박막트랜지스터 제조방법을 도시한 공정순서도.

Claims (5)

  1. 기판상에 형성된 절연막상부에 게에트전극을 형성하는 공정과, 상기 게이트전극의 양측 하부의 상기 절연막을 언더컷하는 공정, 게이트전극 전표면에 게이트절연막을 형성하는 공정, 결과물 전면에 바디폴리실리콘층을 형성하는 공정, 상기 바디폴리실리콘층에 저농도 이온주입을 행하는 공정 및 상기 바디폴리실콘층에 소정의 각도로 경사 이온주입을 고농도로 행하는 공정을 포함하여 이루어진 것을 특징으로 하는 박막트랜지스터 제조방법.
  2. 제1항에 있어서, 상기 게이트전극의 양측 하부의 상기 절연막을 언더컷하는 공정은 상기 게이트전극을 마스크로 하여 상기 절연막을 건식식각하고 습식식각하는 것임을 특징으로 하는 박막트랜지스터 제조방법.
  3. 제1항에 있어서, 상기 바디폴리실리콘층에 소정의 각도로 경사 이온주입을 고농도로 행하는 공정에 의해 오프셋영역과 소오스 및 드레인영역이 셀프얼라인 형성되는 것을 특징으로 하는 박막트랜지스터 제조방법.
  4. 기판상에 형성된 절연막상부에 게이트전극을 형성하는 공정과, 상기 게이트전극의 일측 하부의 상기 절연막을 언더컷하는 공정, 게이트전극 전표면에 게이트절연막을 형성하는 공정, 결과물 전면에 바디폴리실리콘층을 형성하는 공정, 상기 바디폴리실콘층에 저농도 이온주입을 행하는 공정, 상기 바디폴리실콘층 상부에 소정의 마스크층을 형성하여 소오스 및 드레인 영역이 형성될 부분만을 선택적으로 노출시키는 공정 및 상기 노출된 바디폴리실리콘층부위에 고농도 이온주입을 행하여 소오스 및 드레인영역을 형성하는 공정을 포함하여 이루어진 것을 특징으로 하는 박막트랜지스터 제조방법.
  5. 제4항에 있어서, 상기 게이트전극의 일측 하부의 상기 절연막을 언더컷하는 공정은 게이트전극이 형성된 절연막상에 상기 절연막과 동일한 물질의 절연막을 형성하고, 상기 게이트전극 상부에 형성된 절연막을 선택적으로 식각하여 게이트전극 일측부위에만 남긴 후, 게이트전극 하부의 절연막 및 게이트전극 상부에 형성된 절연막을 습식식각함으로써 이루어지는 것을 특징으로 하는 박막트랜지스터 제조방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940017688A 1994-07-21 1994-07-21 박막트랜지스터 제조방법 KR0132490B1 (ko)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019940017688A KR0132490B1 (ko) 1994-07-21 1994-07-21 박막트랜지스터 제조방법
US08/504,688 US5547883A (en) 1994-07-21 1995-07-20 Method for fabricating thin film transistor
JP7206730A JP2707433B2 (ja) 1994-07-21 1995-07-21 薄膜トランジスタの製造方法

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KR1019940017688A KR0132490B1 (ko) 1994-07-21 1994-07-21 박막트랜지스터 제조방법

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KR0132490B1 KR0132490B1 (ko) 1998-04-16

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US5547883A (en) 1996-08-20
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KR0132490B1 (ko) 1998-04-16

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