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    • 7. 发明授权
    • P-channel MOS transistor and fabrication process thereof
    • P沟道MOS晶体管及其制造工艺
    • US07262465B2
    • 2007-08-28
    • US11114047
    • 2005-04-26
    • Akiyoshi HatadaAkira KatakamiNaoyoshi TamuraYosuke ShimamuneMasashi Shima
    • Akiyoshi HatadaAkira KatakamiNaoyoshi TamuraYosuke ShimamuneMasashi Shima
    • H01L27/01
    • H01L29/78639H01L29/7842H01L29/7848H01L29/78684
    • A p-channel MOS transistor includes a strained SOI substrate formed of a SiGe mixed crystal layer and a strained Si layer formed on the SiGe mixed crystal layer via an insulation film, a channel region being formed in the strained Si layer, a gate electrode formed on the strained Si layer in correspondence to the channel region via a gate insulation film, and first and second p-type diffusion regions formed in the strained Si layer at respective first and second sides of the channel region, wherein the strained Si layer has first and second sidewall surfaces respectively at the first and second sides thereof, a first SiGe mixed crystal region being formed epitaxially to the SiGe mixed crystal layer in contact with the first sidewall surface, a second SiGe mixed crystal region being formed epitaxially to the SiGe mixed crystal layer in contact with the second sidewall surface, the first and second SiGe mixed crystal regions being in lattice matching with the strained silicon layer respectively at the first and second sidewall surfaces.
    • p沟道MOS晶体管包括由SiGe混晶层形成的应变SOI衬底和经由绝缘膜形成在SiGe混晶层上的应变Si层,形成在应变Si层中的沟道区,形成栅电极 在通过栅极绝缘膜对应于沟道区的应变Si层上,以及在沟道区的相应第一和第二侧处在应变Si层中形成的第一和第二p型扩散区,其中应变Si层具有第一 和第二侧壁表面,分别与第一侧壁表面接触的SiGe混合晶体层外延形成第一SiGe混合晶体区域,第二SiGe混合晶体区域外延形成SiGe混合晶体 层与第二侧壁表面接触,第一和第二SiGe混合晶体区域与应变硅层的格子匹配 在第一和第二侧壁表面上。