Invention Grant
- Patent Title: Methods for manufacturing thin film transistor
- Patent Title (中): 制造薄膜晶体管的方法
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Application No.: US13924741Application Date: 2013-06-24
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Publication No.: US08703560B2Publication Date: 2014-04-22
- Inventor: Hidekazu Miyairi , Shinya Sasagawa , Akihiro Ishizuka
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2007-228325 20070903
- Main IPC: H01L21/84
- IPC: H01L21/84

Abstract:
The present invention provides a method for manufacturing a highly reliable semiconductor device with a small amount of leakage current. In a method for manufacturing a thin film transistor, etching is conducted using a resist mask to form a back channel portion in the thin film transistor, the resist mask is removed, a part of the back channel is etched to remove etching residue and the like left over the back channel portion, whereby leakage current caused by the residue and the like can be reduced. The etching step of the back channel portion can be conducted by dry etching using non-bias.
Public/Granted literature
- US20130280867A1 METHODS FOR MANUFACTURING THIN FILM TRANSISTOR AND DISPLAY DEVICE Public/Granted day:2013-10-24
Information query
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