发明授权
- 专利标题: Etch process for recessing polysilicon in trench structures
- 专利标题(中): 用于在沟槽结构中凹陷多晶硅的蚀刻工艺
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申请号: US10122996申请日: 2002-04-12
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公开(公告)号: US06740595B2公开(公告)日: 2004-05-25
- 发明人: Stephan Kudelka , Helmut Tews , Alexander Michaelis , Uwe Schroeder , Martin Popp , Kristin Schupke , Daniel Koehler
- 申请人: Stephan Kudelka , Helmut Tews , Alexander Michaelis , Uwe Schroeder , Martin Popp , Kristin Schupke , Daniel Koehler
- 主分类号: H01L21311
- IPC分类号: H01L21311
摘要:
A method for eching a recess in a polysilicon region of a semiconductor device by applying a solution of NH4OH in water to the polysilicon.
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