发明申请
- 专利标题: Contact etching utilizing partially recessed hard mask
- 专利标题(中): 接触蚀刻利用部分凹陷的硬掩模
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申请号: US11540392申请日: 2006-09-29
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公开(公告)号: US20070018341A1公开(公告)日: 2007-01-25
- 发明人: Wen-Kuei Hsieh , Hui-Min Mao , Yi-Nan Chen
- 申请人: Wen-Kuei Hsieh , Hui-Min Mao , Yi-Nan Chen
- 申请人地址: TW TAOYUAN
- 专利权人: NANYA TECHNOLOGY CORPORATION
- 当前专利权人: NANYA TECHNOLOGY CORPORATION
- 当前专利权人地址: TW TAOYUAN
- 优先权: TWTW93116521 20040609
- 主分类号: H01L23/544
- IPC分类号: H01L23/544
摘要:
A method for forming contact holes using a partially recessed hard mask. A substrate with a device region and an alignment region having an opening therein, acting as an alignment mark, is provided. A dielectric layer is formed overlying the substrate and fills the opening. A polysilicon layer is formed on the dielectric layer, with over the opening on the alignment region comprising a recessed region and on the device region comprising a plurality of holes therein to expose the underlying dielectric layer. The exposed dielectric layer on the device region is etched to form contact holes therein.
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