发明授权
- 专利标题： Semiconductor device and method of manufacturing the same
- 专利标题（中）： 半导体装置及其制造方法
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申请号： US13240303申请日： 2011-09-22
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公开(公告)号： US08278177B2公开(公告)日： 2012-10-02
- 发明人: Yosuke Shimamune , Masahiro Fukuda , Young Suk Kim , Akira Katakami , Akiyoshi Hatada , Naoyoshi Tamura , Hiroyuki Ohta
- 申请人： Yosuke Shimamune , Masahiro Fukuda , Young Suk Kim , Akira Katakami , Akiyoshi Hatada , Naoyoshi Tamura , Hiroyuki Ohta
- 申请人地址： JP Yokohama
- 专利权人： Fujitsu Semiconductor Limited
- 当前专利权人： Fujitsu Semiconductor Limited
- 当前专利权人地址： JP Yokohama
- 代理机构： Westerman, Hattori, Daniels & Adrian, LLP
- 优先权： JP2006-206910 20060728
- 主分类号： H01L21/336
- IPC分类号： H01L21/336
摘要：
A first p-type SiGe mixed crystal layer is formed by an epitaxial growth method in a trench, and a second p-type SiGe mixed crystal layer is formed. On the second SiGe mixed crystal layer, a third p-type SiGe mixed crystal layer is formed. The height of an uppermost surface of the first SiGe mixed crystal layer from the bottom of the trench is lower than the depth of the trench with the surface of the silicon substrate being the standard. The height of an uppermost surface of the second SiGe mixed crystal layer from the bottom of the trench is higher than the depth of the trench with the surface of the silicon substrate being the standard. Ge concentrations in the first and third SiGe mixed crystal layers are lower than a Ge concentration in the second SiGe mixed crystal layer.
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