发明申请
- 专利标题: Methods for forming shallow trench isolation structures in deep trenches and uses of the same
- 专利标题(中): 在深沟中形成浅沟槽隔离结构的方法及其用途
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申请号: US11580807申请日: 2006-10-13
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公开(公告)号: US20080032471A1公开(公告)日: 2008-02-07
- 发明人: Wen-Shuo Kuo , Chao-Hsi Chung , Yung Yao Lee , Hui-Min Li
- 申请人: Wen-Shuo Kuo , Chao-Hsi Chung , Yung Yao Lee , Hui-Min Li
- 申请人地址: TW Hsinchu
- 专利权人: Promos Technologies Inc.
- 当前专利权人: Promos Technologies Inc.
- 当前专利权人地址: TW Hsinchu
- 优先权: TW095128453 20060803
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
A method for manufacturing a shallow trench isolation structure in a deep trench and application thereof are provided, wherein the deep trench having an upper electrode and an insulation layer on the upper electrode is formed in a substrate which has a pad insulation layer. The method comprises the following steps: forming a hard mask on the first insulation layer, doping a first portion of the hard mask, removing the undoped portion of the hard mask to expose a portion of the first insulation layer and reserve the first portion of the hard mask, removing the exposed portion of the first insulation layer to expose a portion of the upper electrode, and forming a conductive layer on the exposed portion of the upper electrode wherein a predetermined distance exists between the upper surface of the conductive layer and the pad insulation layer.
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