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    • 37. 发明授权
    • Method of fabricating CMOS transistor and CMOS transistor fabricated thereby
    • 制造CMOS晶体管和CMOS晶体管的方法
    • US07354835B2
    • 2008-04-08
    • US11157521
    • 2005-06-21
    • Dong-suk ShinHwa-sung RheeUeno TetsujiHo LeeSeung-hwan Lee
    • Dong-suk ShinHwa-sung RheeUeno TetsujiHo LeeSeung-hwan Lee
    • H01L21/336
    • H01L29/66636H01L21/823814H01L21/823835H01L21/823842H01L29/165H01L29/4933H01L29/665H01L29/66628H01L29/7848
    • In a method of fabricating a CMOS transistor, and a CMOS transistor fabricated according to the method, the characteristics of first and second conductivity type MOS transistors are both simultaneously improved. At the same time, the fabrication process is simplified by reducing the number of masks required. The method includes amorphizing the active region of only the second conductivity type MOS transistor, and performing selective etching to form a first recessed region of a first depth in the active region of the first conductivity type MOS transistor and a second recessed region of a second depth that is greater than the first depth in the active region of the second conductivity type MOS transistor. Selective epitaxial growth is performed in the first and second recessed regions to form an elevated epitaxial layer that fills the first recessed region and extends to a level that is above the upper surface of the semiconductor substrate and to form a recessed epitaxial layer that fills the second recessed region.
    • 在制造CMOS晶体管的方法和根据该方法制造的CMOS晶体管的情况下,第一和第二导电型MOS晶体管的特性都同时改善。 同时,通过减少所需掩模的数量来简化制造过程。 该方法包括仅使第二导电型MOS晶体管的有源区非晶化,并进行选择性蚀刻,以在第一导电类型MOS晶体管的有源区中形成第一深度的第一凹陷区域和第二深度的第二凹陷区域 大于第二导电类型MOS晶体管的有源区中的第一深度。 在第一和第二凹陷区域中执行选择性外延生长,以形成一个升高的外延层,其填充第一凹陷区域并延伸到半导体衬底的上表面之上的水平面并形成填充第二凹陷区域的凹陷外延层 凹陷区域。