Independently variably controlled pulsed R.F. plasma chemical va

Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board

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427 39, 118723, 118698, 156643, 156345, 156662, C23C 1308, H01L 21306

Patent

active

045005630

ABSTRACT:
Semiconductive wafers are processed, i.e., etched or layers deposited thereon, by means of a plasma enhanced chemical vapor processing system wherein the plasma is generated by a train of R.F. power pulses. The pulse repetition rate, pulse length and peak power level of the individual pulses are independently variably controlled to variably control the uniformity of the processing of the semiconductive wafers within the processing gaps.

REFERENCES:
patent: 3677799 (1972-07-01), Hou
patent: 4223048 (1980-09-01), Engle, Jr.
patent: 4263088 (1981-04-01), Gorin
patent: 4401507 (1983-08-01), Engle

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