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Ecr Plasma Oxidation of Amorphous Silicon for Improvement of The Interface State in a Poly Silicon Thin Film Transistor

Published online by Cambridge University Press:  10 February 2011

Tae-Hyung Ihn ,
Seok-Woon Lee ,
Byung-Il Lee ,
Yoo-Chan Jeon  and
Seung-Ki Joo
Tae-Hyung Ihn
Affiliation:
Dept. Of metall. Eng. Seoul nat'l univ.
Seok-Woon Lee
Affiliation:
Dept. Of metall. Eng. Seoul nat'l univ.
Byung-Il Lee
Affiliation:
Dept. Of metall. Eng. Seoul nat'l univ.
Yoo-Chan Jeon
Affiliation:
Korea Lg Semicon Co. Ltd.
Seung-Ki Joo
Affiliation:
Dept. Of metall. Eng. Seoul nat'l univ.
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Abstract

A new oxidation process of the poly Silicon thin films has been demonstrated, where the amorphous silicon thin film was oxidized by ECR plasma at room temperature and then crystallized at 600°C for 30hrs(pre-oxidation). For comparison, amorphous silicon thin film was oxidized after crystallization(post-oxidation). The interface roughness turned out to be only 3Å in case of the pre-oxidation process, while the post-oxidation showed about 8Å of the interface roughness. The pre-oxidized TFT showed the constant mobility at high gate voltages, the post-oxidized TFT showed serious degradation of the mobility at high gate voltages.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 424: Symposium H – Flat Panel Display Materials II , 1996 , 189
Copyright
Copyright © Materials Research Society 1997

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