发明授权
- 专利标题: Dual stress memorization technique for CMOS application
- 专利标题(中): CMOS应用的双重应力记忆技术
-
申请号: US11758291申请日: 2007-06-05
-
公开(公告)号: US07834399B2公开(公告)日: 2010-11-16
- 发明人: Thomas S. Kanarsky , Qiqing Ouyang , Haizhou Yin
- 申请人: Thomas S. Kanarsky , Qiqing Ouyang , Haizhou Yin
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Scully, Scott, Murphy & Presser, P.C.
- 代理商 Louis J. Percello, Esq.
- 主分类号: H01L29/76
- IPC分类号: H01L29/76
摘要:
A stress-transmitting dielectric layer is formed on the at least one PFET and the at least one NFET. A tensile stress generating film, such as a silicon nitride, is formed on the at least one NFET by blanket deposition and patterning. A compressive stress generating film, which may be a refractive metal nitride film, is formed on the at least one PFET by a blanket deposition and patterning. An encapsulating dielectric film is deposited over the compress stress generating film. The stress is transferred from both the tensile stress generating film and the compressive stress generating film into the underlying semiconductor structures. The magnitude of the transferred compressive stress from the refractory metal nitride film may be from about 5 GPa to about 20 GPa. The stress is memorized during an anneal and remains in the semiconductor devices after the stress generating films are removed.
公开/授权文献
- US20080303101A1 DUAL STRESS MEMORIZATION TECHNIQUE FOR CMOS APPLICATION 公开/授权日:2008-12-11
信息查询
IPC分类: