发明授权
- 专利标题: Semiconductor devices and methods of manufacture thereof
- 专利标题(中): 半导体器件及其制造方法
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申请号: US12307800申请日: 2007-07-09
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公开(公告)号: US07919364B2公开(公告)日: 2011-04-05
- 发明人: Jan Sonsky , Gerben Doornbos
- 申请人: Jan Sonsky , Gerben Doornbos
- 申请人地址: NL Eindhoven
- 专利权人: NXP B.V.
- 当前专利权人: NXP B.V.
- 当前专利权人地址: NL Eindhoven
- 优先权: EP06116968 20060711
- 国际申请: PCT/IB2007/052698 WO 20070709
- 国际公布: WO2008/007331 WO 20080117
- 主分类号: H01L21/332
- IPC分类号: H01L21/332
摘要:
A FinFET and methods for its manufacture are provided. The method of the invention provides an elegant process for manufacturing FinFETs with separated gates. It is compatible with a wide range of dielectric materials and gate electrode materials, providing that the gate electrode material(s) can be deposited conformally. Provision of at least one upstanding structure (or “dummy fin”) (40) on each side of the fin (4) serves to locally increase the thickness of the gate electrode material layer (70). In particular, as the shortest distance between each upstanding structure (40) and the respective side of the fin (4) is arranged in accordance with the invention to be less than twice the thickness of the conformal layer, the thickness of the gate electrode material layer (70) all the way across this distance between each upstanding structure (40) and the fin (4) is increased relative to that over planar regions of the substrate (2). Thus, following an anisotropic etch to remove gate electrode material (70) overlying the fin (4), some material nevertheless remains between the upstanding structures and the fin. Thus, an enlarged area of gate electrode material is formed for use as a gate contact pad.
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