发明授权
US07906385B2 Method for selectively forming strain in a transistor by a stress memorization technique without adding additional lithography steps
有权
通过应力存储技术在晶体管中选择性地形成应变的方法,而不添加额外的光刻步骤
- 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): 通过应力存储技术在晶体管中选择性地形成应变的方法,而不添加额外的光刻步骤
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申请号: US12179116申请日: 2008-07-24
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公开(公告)号: US07906385B2公开(公告)日: 2011-03-15
- 发明人: Markus Lenski , Frank Wirbeleit , Anthony Mowry
- 申请人: Markus Lenski , Frank Wirbeleit , Anthony Mowry
- 申请人地址: KY Grand Cayman
- 专利权人: GlobalFoundries Inc.
- 当前专利权人: GlobalFoundries Inc.
- 当前专利权人地址: KY Grand Cayman
- 代理机构: Williams, Morgan & Amerson, P.C.
- 优先权: DE102008007003 20080131
- 主分类号: H01L21/8238
- IPC分类号: H01L21/8238
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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