Invention Grant
- Patent Title: Dual stress memorization technique for CMOS application
- Patent Title (中): CMOS应用的双重应力记忆技术
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Application No.: US11758291Application Date: 2007-06-05
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Publication No.: US07834399B2Publication Date: 2010-11-16
- Inventor: Thomas S. Kanarsky , Qiqing Ouyang , Haizhou Yin
- Applicant: Thomas S. Kanarsky , Qiqing Ouyang , Haizhou Yin
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Agent Louis J. Percello, Esq.
- Main IPC: H01L29/76
- IPC: H01L29/76

Abstract:
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.
Public/Granted literature
- US20080303101A1 DUAL STRESS MEMORIZATION TECHNIQUE FOR CMOS APPLICATION Public/Granted day:2008-12-11
Information query
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