Invention Grant
- Patent Title: Etching method and manufacturing method of thin film transistor
- Patent Title (中): 薄膜晶体管的蚀刻方法和制造方法
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Application No.: US13302176Application Date: 2011-11-22
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Publication No.: US08394685B2Publication Date: 2013-03-12
- Inventor: Toshiyuki Isa , Tomohiro Kimura
- Applicant: Toshiyuki Isa , Tomohiro Kimura
- Applicant Address: JP Atsugi-shi, Kanagawa-ken JP Osaka-shi, Osaka
- Assignee: Semiconductor Energy Laboratory Co., Ltd.,Sharp Kabushiki Kaisha
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.,Sharp Kabushiki Kaisha
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken JP Osaka-shi, Osaka
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2010-271771 20101206
- Main IPC: H01L21/8238
- IPC: H01L21/8238

Abstract:
The amorphous silicon film is formed over the microcrystalline silicon film, and plasma treatment is performed on the amorphous silicon film in a mixed gas atmosphere of H2 and Ar at a pressure higher than 1000 Pa, so that etching is performed to expose the microcrystalline silicon film. In the etching, the etching rate of the amorphous silicon film and that of the microcrystalline silicon film is large.
Public/Granted literature
- US20120156835A1 ETCHING METHOD AND MANUFACTURING METHOD OF THIN FILM TRANSISTOR Public/Granted day:2012-06-21
Information query
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