Fishing – trapping – and vermin destroying
Patent
1995-11-30
1996-11-26
Dang, Trung
Fishing, trapping, and vermin destroying
437203, 437 31, 437 32, 437982, 437947, 148DIG50, 148DIG11, 148DIG133, H01L 2144, H01L 2148
Patent
active
055785220
ABSTRACT:
A semiconductor device including a layer formed without being affected by a stepped ground pattern and a method of fabricating the semiconductor device are disclosed. Cap portions (30) (insulating layers) formed over trenches (13) and covering doped polysilicon (5) have an inclined surface (26) which satisfies Y/X <5 where X is the length of the inclined surface (26) in a direction of the surface of a body (50) and Y is the height of the inclined surface (26) from the surface of the body (50). Formation of the insulating layers having the smooth inclined surface satisfying Y/X<5 permits a first main electrode to be formed nondefectively without being affected by the ground pattern including the insulating layers.
REFERENCES:
patent: 4967245 (1990-10-01), Cogan et al.
patent: 5173435 (1992-12-01), Harada
patent: 5234852 (1993-08-01), Liou
patent: 5270257 (1993-12-01), Shin
patent: 5283201 (1994-02-01), Tsang et al.
patent: 5378655 (1995-01-01), Hutchings et al.
Minato Tadaharu
Nakamura Katsumi
Shiozawa Katsuomi
Tominaga Shuuichi
Dang Trung
Mitsubishi Denki & Kabushiki Kaisha
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