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    • 48. 发明授权
    • Stack SiGe for short channel improvement
    • Stack SiGe用于短信道改进
    • US07538387B2
    • 2009-05-26
    • US11653687
    • 2007-01-16
    • Pang-Yen Tsai
    • Pang-Yen Tsai
    • H01L29/76H01L29/94H01L31/062H01L31/113H01L31/119
    • H01L29/7848H01L29/165H01L29/665H01L29/6653H01L29/6656H01L29/6659H01L29/66636H01L29/7834Y10S257/90
    • A semiconductor structure includes a first compound layer including an element, and a first impurity having a first impurity concentration; and a second compound layer including the element and a second impurity of a same conductivity type as the first impurity, wherein the second impurity has a second impurity concentration, and wherein the second compound layer is on the first compound layer. The semiconductor structure further includes a third compound layer including the element and a third impurity of a same conductivity type as the first impurity, wherein the third impurity has a third impurity concentration, and wherein the third compound layer is on the second compound layer, and wherein the second impurity concentration is substantially lower than the first and the third impurity concentrations.
    • 半导体结构包括含有元素的第一化合物层和具有第一杂质浓度的第一杂质; 以及第二化合物层,其包含所述元素和与所述第一杂质相同的导电类型的第二杂质,其中所述第二杂质具有第二杂质浓度,并且其中所述第二化合物层在所述第一化合物层上。 半导体结构还包括第三化合物层,该第三化合物层包括与第一杂质相同导电类型的元素和第三杂质,其中第三杂质具有第三杂质浓度,并且其中第三化合物层位于第二化合物层上,以及 其中所述第二杂质浓度基本上低于所述第一和第三杂质浓度。
    • 50. 发明授权
    • High performance CMOS device design
    • 高性能CMOS器件设计
    • US07465972B2
    • 2008-12-16
    • US11115484
    • 2005-04-27
    • Chih-Hao WangShang-Chih ChenChing-Wei TsaiTa-Wei WangPang-Yen Tsai
    • Chih-Hao WangShang-Chih ChenChing-Wei TsaiTa-Wei WangPang-Yen Tsai
    • H01L31/62
    • H01L21/823807H01L21/823814H01L29/1054H01L29/66553H01L29/66636
    • A semiconductor device includes a gate, which comprises a gate electrode and a gate dielectric underlying the gate electrode, a spacer formed on a sidewall of the gate electrode and the gate dielectric, a buffer layer having a first portion underlying the gate dielectric and the spacer and a second portion adjacent the spacer wherein the top surface of the second portion of the buffer layer is recessed below the top surface of the first portion of the buffer layer, and a source/drain region substantially aligned with the spacer. The buffer layer preferably has a greater lattice constant than an underlying semiconductor substrate. The semiconductor device may further include a semiconductor-capping layer between the buffer layer and the gate dielectric, wherein the semiconductor-capping layer has a smaller lattice constant then the buffer layer.
    • 半导体器件包括栅极,栅极包括位于栅极电极下方的栅极电极和栅极电介质,形成在栅极电极和栅极电介质的侧壁上的间隔物,缓冲层,其具有位于栅极电介质下方的第一部分和间隔物 以及与间隔物相邻的第二部分,其中缓冲层的第二部分的顶表面在缓冲层的第一部分的顶表面下方凹陷,并且基本上与间隔物对准的源极/漏极区域。 缓冲层优选具有比下面的半导体衬底更大的晶格常数。 半导体器件还可以包括在缓冲层和栅极电介质之间的半导体覆盖层,其中半导体覆盖层具有比缓冲层更小的晶格常数。