KR100858821B1 - 박막 트랜지스터와 그 제조 방법 및 상기 박막트랜지스터를 포함하는 유기 발광 표시 장치와 그 제조방법 - Google Patents
박막 트랜지스터와 그 제조 방법 및 상기 박막트랜지스터를 포함하는 유기 발광 표시 장치와 그 제조방법 Download PDFInfo
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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
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
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Abstract
Description
Claims (13)
- 게이트 전극;상기 게이트 전극과 절연되고 산화물로 형성된 활성층;상기 게이트 전극과 절연되고, 상기 활성층과 전기적으로 연결되도록 상기 활성층에 접하도록 산화물로 형성된 소스 및 드레인 전극을 포함하고,상기 활성층과 상기 소스 및 드레인 전극은 ALD방법을 이용해 인시츄(insitu)로 형성되고, 상기 소스 및 드레인 전극과 접하는 상기 활성층의 표면의 RMS거칠기 값이 1 나노미터 이하인 박막 트랜지스터.
- 제1 항에 있어서,상기 활성층 및 상기 소스 및 드레인 전극은 Zn을 포함하는 산화물로 형성된 박막 트랜지스터.
- 제2 항에 있어서,상기 산화물은 ZnSnO, ZnInO, ZnInGaO 및 ZnSnGaO로 이루어지는 군으로부터 선택된 어느 하나를 포함하는 박막 트랜지스터.
- 제1 항에 있어서,상기 활성층의 캐리어 농도는 1E14 내지 1E15 cm-3, 상기 소스 및 드레인 전극의 캐리어 농도는 1e16 내지 1e17 cm-3로 형성된 박막 트랜지스터.
- 제1 항 내지 제4 항 중 어느 하나의 항의 박막 트랜지스터; 및상기 박막 트랜지스터와 전기적으로 연결되는 유기 전계 발광 소자를 포함하는 유기 발광 표시 장치.
- 기판상에 게이트 전극을 형성하는 단계;상기 게이트 전극과 절연된 활성층을 형성하는 단계; 및상기 게이트 전극과 절연되고, 상기 활성층과 전기적으로 연결되도록 상기 활성층과 접하도록 산화물로 소스 및 드레인 전극을 형성하는 단계를 포함하고,상기 활성층과 상기 소스 및 드레인 전극은 ALD(atomic layer deposition)방법을 이용하여 인시츄(insitu) 공정으로 형성하는 박막 트랜지스터의 제조 방법.
- 제6 항에 있어서,상기 활성층 및 상기 소스 및 드레인 전극은 ZnO계열의 산화물로 형성하는 박막 트랜지스터의 제조 방법.
- 제7 항에 있어서,상기 ZnO계열의 산화물은 ZnSnO, ZnInO, ZnInGaO 및 ZnSnGaO로 이루어지는 군으로부터 선택된 어느 하나를 포함하는 박막 트랜지스터의 제조 방법.
- 제6 항에 있어서,상기 활성층의 캐리어 농도는 1E14 내지 1E15 cm-3, 상기 소스 및 드레인 전극의 캐리어 농도는 1e16 내지 1e17 cm-3로 형성하는 박막 트랜지스터의 제조 방법.
- 제6 항에 있어서,상기 활성층을 형성하는 단계의 공정 온도와 상기 소스 및 드레인 전극을 형성하는 단계의 공정 온도가 상이한 박막 트랜지스터의 제조 방법.
- 제10 항에 있어서,상기 ALD 방법으로 공정을 진행 시 H20를 옥시던트(oxidant)로 사용하고, 상기 활성층을 형성하는 단계의 공정 온도보다 상기 소스 및 드레인 전극을 형성하는 단계의 공정 온도가 높은 박막 트랜지스터의 제조 방법.
- 제6 항에 있어서,상기 활성층 및 상기 소스 및 드레인 전극을 형성하는 단계는 하프톤 마스 크(halftone mask)를 이용해 상기 활성층 및 상기 소스 및 드레인 전극을 일괄적으로 패터닝하는 단계를 포함하는 박막 트랜지스터의 제조 방법.
- 제6 항 내지 제12 항 중 어느 하나의 항의 박막 트랜지스터를 형성하는 단계; 및상기 박막 트랜지스터와 전기적으로 연결되는 유기 전계 발광 소자를 형성하는 단계를 포함하는 유기 발광 표시 장치의 제조 방법.
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