- 专利标题: Method of manufacture of MOSFET device with in-situ doped, raised source and drain structures
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申请号: US10300239申请日: 2002-11-20
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公开(公告)号: US06774000B2公开(公告)日: 2004-08-10
- 发明人: Wesley C. Natzle , Marc W. Cantell , Louis D. Lanzerotti , Effendi Leobandung , Brian L. Tessier , Ryan W. Wuthrich
- 申请人: Wesley C. Natzle , Marc W. Cantell , Louis D. Lanzerotti , Effendi Leobandung , Brian L. Tessier , Ryan W. Wuthrich
- 主分类号: H01L21336
- IPC分类号: H01L21336
摘要:
A process for manufacturing an FET device. A semiconductor substrate is covered with a gate dielectric layer and with a conductive gate electrode formed over the gate dielectric. Blanket layers of silicon oxide may be added. An optional collar of silicon nitride may be formed over the silicon oxide layer around the gate electrode. Two precleaning steps are performed. Chemical oxide removal gases are then deposited, covering the device with an adsorbed reactant film. The gate dielectric (aside from the gate electrode) is removed, as the adsorbed reactant film reacts with the gate dielectric layer to form a rounded corner of silicon oxide at the base of the gate electrode. One or two in-situ doped silicon layers are deposited over the source/drain regions to form single or laminated epitaxial raised source/drain regions over the substrate protruding beyond the surface of the gate dielectric.