发明申请
- 专利标题: METHOD FOR ETCHING A LAYER ON A SILICON SEMICONDUCTOR SUBSTRATE
- 专利标题(中): 在硅半导体衬底上蚀刻层的方法
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申请号: US12452692申请日: 2008-07-02
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公开(公告)号: US20100203739A1公开(公告)日: 2010-08-12
- 发明人: Volker Becker , Franz Laermer , Tino Fuchs , Christina Leinenbach
- 申请人: Volker Becker , Franz Laermer , Tino Fuchs , Christina Leinenbach
- 优先权: DE102007033685.5 20070719
- 国际申请: PCT/EP2008/058539 WO 20080702
- 主分类号: H01L21/306
- IPC分类号: H01L21/306 ; C23F1/08
摘要:
A method for selective etching of an SiGe mixed semiconductor layer on a silicon semiconductor substrate by dry chemical etching of the SiGe mixed semiconductor layer with the aid of an etching gas selected from the group including ClF3 and/or ClF5, a gas selected from the group including Cl2 and/or HCl being added to the etching gas.
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