发明授权
- 专利标题: Semiconductor device and method for manufacturing local interconnect structure thereof
- 专利标题(中): 半导体装置及其局部互连结构的制造方法
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申请号: US13380061申请日: 2011-02-27
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公开(公告)号: US08987136B2公开(公告)日: 2015-03-24
- 发明人: Huicai Zhong , Qingqing Liang
- 申请人: Huicai Zhong , Qingqing Liang
- 申请人地址: CN Beijing
- 专利权人: Institute of Microelectronics, Chinese Academy of Sciences
- 当前专利权人: Institute of Microelectronics, Chinese Academy of Sciences
- 当前专利权人地址: CN Beijing
- 代理机构: Osha Liang LLP
- 优先权: CN201010259626 20100820
- 国际申请: PCT/CN2011/071346 WO 20110227
- 国际公布: WO2012/022144 WO 20120223
- 主分类号: H01L21/44
- IPC分类号: H01L21/44 ; H01L21/336 ; H01L21/8234 ; H01L29/78 ; H01L21/768
摘要:
A semiconductor device and a method for manufacturing a local interconnect structure for a semiconductor device is provided. The method includes forming removable sacrificial sidewall spacers between sidewall spacers and outer sidewall spacers on two sides of a gate on a semiconductor substrate, and forming contact through-holes at source/drain regions in the local interconnect structure between the sidewall spacer and the outer sidewall spacer on the same side of the gate immediately after removing the sacrificial sidewall spacers. Once the source/drain through-holes are filled with a conductive material to form contact vias, the height of the contact vias shall be same as the height of the gate. The contact through-holes, which establish the electrical connection between a subsequent first layer of metal wiring and the source/drain regions or the gate region at a lower level in the local interconnect structure, shall be made in the same depth.
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