发明申请
US20090197381A1 METHOD FOR SELECTIVELY FORMING STRAIN IN A TRANSISTOR BY A STRESS MEMORIZATION TECHNIQUE WITHOUT ADDING ADDITIONAL LITHOGRAPHY STEPS
有权
通过应力记忆技术选择性地在晶体管中形成应变的方法,而不需要添加附加的光刻步骤
- 专利标题: METHOD FOR SELECTIVELY FORMING STRAIN IN A TRANSISTOR BY A STRESS MEMORIZATION TECHNIQUE WITHOUT ADDING ADDITIONAL LITHOGRAPHY STEPS
- 专利标题(中): 通过应力记忆技术选择性地在晶体管中形成应变的方法,而不需要添加附加的光刻步骤
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申请号: US12179116申请日: 2008-07-24
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公开(公告)号: US20090197381A1公开(公告)日: 2009-08-06
- 发明人: Markus Lenski , Frank Wirbeleit , Anthony Mowry
- 申请人: Markus Lenski , Frank Wirbeleit , Anthony Mowry
- 优先权: DE102008007003.3 20080131
- 主分类号: H01L21/8236
- IPC分类号: H01L21/8236
摘要:
A selective stress memorization technique is disclosed in which the creation of tensile strain may be accomplished without additional photolithography steps by using an implantation mask or any other mask required during a standard manufacturing flow, or by providing a patterned cap layer for a strained re-crystallization of respective drain and source areas. In still other aspects, additional anneal steps may be used for selectively creating a crystalline state and a non-crystalline state prior to the re-crystallization on the basis of a cap layer. Thus, enhanced strain may be obtained in one type of transistor while not substantially negatively affecting the other type of transistor without requiring additional photolithography steps.
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