Invention Grant
US09337048B2 Method for disconnecting polysilicon stringers during plasma etching
有权
在等离子体蚀刻期间断开多晶硅桁条的方法
- Patent Title: Method for disconnecting polysilicon stringers during plasma etching
- Patent Title (中): 在等离子体蚀刻期间断开多晶硅桁条的方法
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Application No.: US14493608Application Date: 2014-09-23
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Publication No.: US09337048B2Publication Date: 2016-05-10
- Inventor: Ching-Hsiung Lee , Shih-Chang Tsai
- Applicant: Macronix International Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: MACRONIX INTERNATIONAL CO., LTD.
- Current Assignee: MACRONIX INTERNATIONAL CO., LTD.
- Current Assignee Address: TW Hsinchu
- Agency: Stout, Uxa & Buyan, LLP
- Agent Frank J. Uxa
- Main IPC: H01L21/336
- IPC: H01L21/336 ; H01L21/28 ; H01L29/792 ; H01L27/115

Abstract:
A method of fabricating wordlines in semiconductor memory structures is disclosed that eliminates stringers between wordlines while maintaining a stable distribution of threshold voltage. A liner is deposited before performing a wordline etch, and a partial wordline etch is then performed. Remaining portions of the liner are removed, and the wordline etch is completed to form gates having vertical or tapered profiles.
Public/Granted literature
- US20160086806A1 Method for Disconnecting Polysilicon Stringers During Plasma Etching Public/Granted day:2016-03-24
Information query
IPC分类: