Fishing – trapping – and vermin destroying
Patent
1987-12-14
1990-01-30
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
148DIG72, 148DIG51, 148DIG84, 148DIG106, 148DIG149, 156662, 156612, 437 22, 437 90, 437132, 437228, 437935, 437936, H01L 21265, H01L 2120
Patent
active
048973610
ABSTRACT:
When high-vacuum methods are used in the manufacture of miniaturized devices such as, e.g., semiconductor integrated-circuit devices, device layers on a substrate are preferably patterned without breaking of the vacuum. Preferred patterning involves deposition of a semiconductor mask layer, generation of the pattern in the mask layer by ion deflected-beam writing, and transfer of the pattern by dry etching. When the mask layer is an epitaxial layer, further epitaxial layer deposition after patterning may proceed without removal of remaining mask layer material.
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Harriott Lloyd R.
Panish Morton B.
Temkin Henryk
American Telephone & Telegraph Company AT&T Bell Laboratories
Bunch William
Businger Peter A.
Chaudhuri Olik
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