发明申请
US20090081877A1 METHOD OF CONTROLLING STRIATIONS AND CD LOSS IN CONTACT OXIDE ETCH
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控制接触氧化物蚀刻的方法和CD损失
- 专利标题: METHOD OF CONTROLLING STRIATIONS AND CD LOSS IN CONTACT OXIDE ETCH
- 专利标题(中): 控制接触氧化物蚀刻的方法和CD损失
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申请号: US12326834申请日: 2008-12-02
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公开(公告)号: US20090081877A1公开(公告)日: 2009-03-26
- 发明人: Li Li , Bradley J. Howard
- 申请人: Li Li , Bradley J. Howard
- 主分类号: H01L21/3065
- IPC分类号: H01L21/3065
摘要:
A method for controlling striations and CD loss in a plasma etching method is disclosed. During the etching process, the substrate of semiconductor material to be etched is exposed first to plasma under a low power strike and subsequently to a conventional high power strike. CD loss has been found to be reduced by about 400 Angstroms and striations formed in the contact holes are reduced.
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