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    • 75. 发明授权
    • Semiconductor device with grain boundaries
    • 具有晶界的半导体器件
    • US06448577B1
    • 2002-09-10
    • US09037984
    • 1998-03-11
    • Shunpei YamazakiHongyong Zhang
    • Shunpei YamazakiHongyong Zhang
    • H01L2900
    • H01L29/78675
    • A high quality semiconductor device comprising at least a semiconductor film having a microcrystal structure is disclosed, wherein said semiconductor film has a lattice distortion therein and comprises crystal grains at an average diameter of 30 Å to 4 &mgr;m as viewed from the upper surface of said semiconductor film and contains oxygen impurity and concentration of said oxygen impurity is not higher than 7×1019 atoms.cm−3 at an inside position of said semiconductor film. Also is disclosed a method for fabricating semiconductor devices mentioned hereinbefore, which comprises depositing an amorphous semiconductor film containing oxygen impurity at a concentration not higher than 7×1019 atoms.cm−3 by sputtering from a semiconductor target containing oxygen impurity at a concentration not higher than 5×1018 atoms.cm−3 in an atmosphere comprising hydrogen at not less than 10% in terms of partial pressure; and crystallizing said amorphous semiconductor film at a temperature of from 450° C. to 700° C.
    • 公开了一种包括至少具有微晶结构的半导体膜的高质量半导体器件,其中所述半导体膜在其中具有晶格畸变,并且包含从所述半导体的上表面观察的平均直径为30至4μm的晶粒 并且在所述半导体膜的内部位置含有氧杂质,所述氧杂质的浓度不高于7×1019原子/ cm 3。 还公开了一种用于制造上述半导体器件的方法,其包括以不高于5×1018的浓度从含有氧杂质的半导体靶溅射沉积含有浓度不高于7×1019原子/ cm 3的氧杂质的非晶半导体膜 在包含不低于分压10%的氢的气氛中的原子cm -3; 并在450℃至700℃的温度下使所述非晶半导体膜结晶。