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    • 8. 发明申请
    • METHOD FOR FABRICATING STRAINED-SILICON CMOS TRANSISTOR
    • 制备应变硅CMOS晶体管的方法
    • US20080191287A1
    • 2008-08-14
    • US11674660
    • 2007-02-13
    • Pei-Yu ChouShih-Fang TzouJiunn-Hsiung Liao
    • Pei-Yu ChouShih-Fang TzouJiunn-Hsiung Liao
    • H01L27/092H01L21/8238
    • H01L21/823807H01L29/7843
    • First, a semiconductor substrate having a first active region and a second active region is provided. The first active region includes a first transistor and the second active region includes a second transistor. A first etching stop layer, a stress layer, and a second etching stop layer are disposed on the first transistor, the second transistor and the isolation structure. A first etching process is performed by using a patterned photoresist disposed on the first active region as a mask to remove the second etching stop layer and a portion of the stress layer from the second active region. The patterned photoresist is removed, and a second etching process is performed by using the second etching stop layer of the first active region as a mask to remove the remaining stress layer and a portion of the first etching stop layer from the second active region.
    • 首先,提供具有第一有源区和第二有源区的半导体基板。 第一有源区包括第一晶体管,第二有源区包括第二晶体管。 第一蚀刻停止层,应力层和第二蚀刻停止层设置在第一晶体管,第二晶体管和隔离结构上。 通过使用设置在第一有源区上的图案化光致抗蚀剂作为掩模来执行第一蚀刻工艺,以从第二有源区移除第二蚀刻停止层和应力层的一部分。 去除图案化的光致抗蚀剂,并且通过使用第一有源区的第二蚀刻停止层作为掩模来执行第二蚀刻工艺,以从第二有源区去除剩余的应力层和第一蚀刻停止层的一部分。