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    • 8. 发明申请
    • Methods of Forming CMOS Integrated Circuit Devices Having Stressed NMOS and PMOS Channel Regions Therein and Circuits Formed Thereby
    • 形成CMOS集成电路器件的方法,其中形成了NMOS和PMOS沟道区域,由此形成电路
    • US20080242015A1
    • 2008-10-02
    • US11691691
    • 2007-03-27
    • Kyoung-woo LeeJa-hum KuJae-eon Park
    • Kyoung-woo LeeJa-hum KuJae-eon Park
    • H01L21/8238
    • H01L21/823807H01L21/76816H01L21/823871H01L29/7843H01L2924/0002H01L2924/00
    • Methods of forming CMOS integrated circuit devices include forming at least first, second and third transistors in a semiconductor substrate and then covering the transistors with one or more electrically insulating layers that impart a net stress (tensile or compressive) to channel regions of the transistors. The covering step may include covering the first and second transistors with a first electrically insulating layer having a sufficiently high internal stress characteristic to impart a net tensile (or compressive) stress in a channel region of the first transistor and covering the second and third transistors with a second electrically insulating layer having a sufficiently high internal stress characteristic to impart a net compressive (or tensile) stress in a channel region of the third transistor. A step may then performed to selectively remove a first portion of the second electrically insulating layer extending opposite a gate electrode of the second transistor. In addition, a step may be performed to selectively remove a first portion of the first electrically insulating layer extending opposite a gate electrode of the first transistor and a second portion of the second electrically insulating layer extending opposite a gate electrode of the third transistor.
    • 形成CMOS集成电路器件的方法包括在半导体衬底中形成至少第一,第二和第三晶体管,然后用一个或多个赋予晶体管沟道区的净应力(拉伸或压缩)的电绝缘层覆盖晶体管。 覆盖步骤可以包括用具有足够高的内应力特性的第一电绝缘层覆盖第一和第二晶体管,以在第一晶体管的沟道区域中施加净拉伸(或压缩)应力,并用第 具有足够高的内应力特性的第二电绝缘层,以在第三晶体管的沟道区域中施加净压缩(或拉伸)应力。 然后执行步骤以选择性地去除与第二晶体管的栅电极相对延伸的第二电绝缘层的第一部分。 此外,可以执行步骤以选择性地去除与第一晶体管的栅极相对延伸的第一电绝缘层的第一部分和与第三晶体管的栅电极相对延伸的第二电绝缘层的第二部分。