发明授权
- 专利标题: Method for manufacturing semiconductor device having a dual gate insulation layer
- 专利标题(中): 具有双栅极绝缘层的半导体器件的制造方法
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申请号: US12634889申请日: 2009-12-10
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公开(公告)号: US08187942B2公开(公告)日: 2012-05-29
- 发明人: Young Bang Lee
- 申请人: Young Bang Lee
- 申请人地址: KR Gyeonggi-do
- 专利权人: Hynix Semiconductor Inc.
- 当前专利权人: Hynix Semiconductor Inc.
- 当前专利权人地址: KR Gyeonggi-do
- 代理机构: Ladas & Parry LLP
- 优先权: KR10-2009-0031416 20090410
- 主分类号: H01L21/8234
- IPC分类号: H01L21/8234
摘要:
A method for manufacturing a semiconductor device having a dual gate insulation layer is presented. The method includes a step of forming a first insulation layer on a semiconductor substrate which has a first region and a second region. The method includes a step of selectively removing a portion of the first insulation layer formed the second region of the semiconductor substrate. The removal of the portion of the first insulation layer is conducted using an etching solution comprising propylene glycol, HF and amine. The method also includes a step of forming a second insulation layer on the first insulation layer in the first region and on the semiconductor substrate in the second region.
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