Plasma method for coating the inside surface of a glass tube

Details Plasma method for coating the inside surface of a glass tube Plasma method for coating the inside surface of a glass tube

1983-02-08

1984-09-25

Morgenstern, Norman

Coating processes

Measuring, testing, or indicating

Thickness or uniformity of thickness determined

427 38, 427 39, 427238, B05D 722

Patent

active

044735960

ABSTRACT:
A method of making optical fibers by plasma chemical vapor deposition (PCVD) is disclosed wherein the pressure in the glass tube is maintained constant by controlling the rate of evacuation. The pressure-dependent controlled variable is preferably the impedance of the plasma-producing device, and the rate of evacuation is controlled in such a way that this impedance remains constant.

REFERENCES:
patent: 3560248 (1971-02-01), Padgett et al.
patent: 3748169 (1973-07-01), Keller
patent: 4145456 (1979-03-01), Kuppers et al.
patent: 4349373 (1982-09-01), Sterling et al.
patent: 4349582 (1982-09-01), Beerwald et al.

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