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    • 9. 发明授权
    • Method for fabricating semiconductor device
    • 制造半导体器件的方法
    • US08541298B2
    • 2013-09-24
    • US13185002
    • 2011-07-18
    • Hiroshi Kawakubo
    • Hiroshi Kawakubo
    • H01L21/44
    • H01L21/76898H01L21/30621H01L21/3065H01L29/1608
    • A method for fabricating a semiconductor device having a GaN-based semiconductor layer on a first surface of a substrate made of SiC, a pad being provided on the GaN-based layer, includes: forming a first via hole in the substrate by etching, with fluorine based gas, from a second surface of the substrate opposite to the first surface, the etching being carried out with the GaN-based layer being used as an etch stopper; and forming a second via hole in the GaN-based semiconductor layer, with chlorine based gas, from a bottom surface of the first via hole, the etching being carried out with the pad being used as an etching stopper, the chlorine based gas being an etchant different from the fluorine based gas.
    • 一种制造半导体器件的方法,所述半导体器件在由SiC制成的衬底的第一表面上具有GaN基半导体层,所述衬底设置在所述GaN基层上,包括:通过蚀刻在所述衬底中形成第一通孔, 氟基气体,从基板的与第一表面相对的第二表面,蚀刻是用GaN基层作为蚀刻停止层进行的; 并且在所述GaN基半导体层中形成第二通孔,所述第二通孔与所述第一通孔的底表面形成有氯基气体,所述蚀刻用所述焊盘作为蚀刻停止层进行,所述氯基气体为 不同于氟基气体的蚀刻剂。