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    • 43. 发明授权
    • Semiconductor device and fabrication method thereof
    • 半导体器件及其制造方法
    • US07884423B2
    • 2011-02-08
    • US12134516
    • 2008-06-06
    • Kunihiko IwamotoArito OgawaYuuichi Kamimuta
    • Kunihiko IwamotoArito OgawaYuuichi Kamimuta
    • H01L21/70H01L21/8238
    • H01L29/517C23C16/45529C23C16/45531H01L21/28194H01L21/3141H01L21/31637H01L21/31641H01L21/31645H01L21/823857H01L29/495H01L29/4966H01L29/4975H01L29/513
    • CMISFETs having a symmetrical flat band voltage, the same gate electrode material, and a high permittivity dielectric layer is provided for a semiconductor device including n-MISFETs and p-MISFETs, and a fabrication method thereof, the n-MISFETs including: a first metal oxide layer 20, placed on the 1st gate insulating film 16, having a composition ratio shown with M1xM2yO (where M1=Y, La, Ce, Pr, Nd, Sm, Gd, Th, Dy, Ho, Er, Tm, Yb or Lu, M2=Hf, Zr or Ta, and x/(x+y)>0.12); a second metal oxide layer 24; and a second metal oxide layer 24, the p-MISFETs including: a second gate insulating film 18 placed on the surface of the semiconductor substrate 10; a third metal oxide layer 22, placed on the 2nd gate insulating film 18, having a composition ratio shown with M3zM4wO (M3=Al, M4=Hf, Zr or Ta, and z/(z+w)>0.14); a fourth metal oxide layer 26; and a second conductive layer 30 placed on the fourth metal oxide layer 26.
    • 对于包括n-MISFET和p-MISFET的半导体器件及其制造方法,提供具有对称平带电压的CMISFET,相同的栅电极材料和高介电常数介电层及其制造方法,所述n-MISFET包括:第一金属 (M1 = Y,La,Ce,Pr,Nd,Sm,Gd,Th,Dy,Ho,Er,Tm,Yb或...的组成比)放置在第1栅极绝缘膜16上的氧化物层20 Lu,M2 = Hf,Zr或Ta,x /(x + y)> 0.12); 第二金属氧化物层24; 和第二金属氧化物层24,p-MISFET包括:放置在半导体衬底10的表面上的第二栅极绝缘膜18; 放置在第二栅极绝缘膜18上的第三金属氧化物层22具有M3zM4wO(M3 = Al,M4 = Hf,Zr或Ta,z /(z + w)> 0.14)所示的组成比; 第四金属氧化物层26; 以及放置在第四金属氧化物层26上的第二导电层30。