Fishing – trapping – and vermin destroying
Patent
1995-03-10
1997-07-01
Nguyen, Tuan H.
Fishing, trapping, and vermin destroying
437162, 437909, 437974, 148DIG10, 148DIG124, 148DIG135, H01L 21265
Patent
active
056438052
ABSTRACT:
A bipolar device having a level difference between the contact area level of a base electrode and a base region in a silicon substrate, and the contact area level of an emitter electrode and an emitter region in the silicon substrate in the range of 0.03 .mu.m to 0.1 .mu.m by removing undesirable impurities from the emitter region and a predetermined horizontal distance between a sidewall and a device isolation film does not generate dislocation and show good electric characteristics.
REFERENCES:
patent: 5137840 (1992-08-01), Desilets
Hashimoto Takashi
Ikeda Takahide
Masuda Hiroo
Miura Hideo
Nishimura Asao
Hitachi , Ltd.
Nguyen Tuan H.
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