发明申请
- 专利标题: Dry Etching Method And Dry Etching Apparatus
- 专利标题(中): 干蚀刻法和干蚀刻设备
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申请号: US11792238申请日: 2005-12-06
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公开(公告)号: US20080093338A1公开(公告)日: 2008-04-24
- 发明人: Mitsuhiro Okune , Hiroyuki Suzuki
- 申请人: Mitsuhiro Okune , Hiroyuki Suzuki
- 优先权: JP2004-352614 20041206
- 国际申请: PCT/JP05/22351 WO 20051206
- 主分类号: H01L21/306
- IPC分类号: H01L21/306 ; B44C1/22
摘要:
An object of the present invention is suppressing notches in dry etching of a processing object where an etched layer made of a silicon material is formed on an etching stop layer. A substrate 12 has an etched layer 22 made of a silicon material on an etching stop layer 21. SF6/C4F8 gas, as an etching gas, is supplied to generate plasma, and a portion of the etched layer exposed through a resist mask 23 is etched. A sidewall protection layer 24 made of polymer is formed on a sidewall of a trench or hole.
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