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US08482076B2 Method and structure for differential silicide and recessed or raised source/drain to improve field effect transistor 有权
差分硅化物和凹陷或凸起源极/漏极的方法和结构,以改善场效应晶体管

Method and structure for differential silicide and recessed or raised source/drain to improve field effect transistor
Abstract:
A method forms an integrated circuit structure. The method patterns a protective layer over a first-type field effect transistor and removes a stress liner from above a second-type field effect transistors. Then, the method removes a first-type silicide layer from source and drain regions of the second-type field effect transistor, but leaves at least a portion of the first-type silicide layer on the gate conductor of the second-type field effect transistor. The method forms a second-type silicide layer on the gate conductor and the source and drain regions of the second-type field effect transistor. The second-type silicide layer that is formed is different than the first-type silicide layer. For example, the first-type silicide layer and the second-type silicide layer can comprise different materials, different thicknesses, different crystal orientations, and/or different chemical phases, etc.
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