Method of producing internally coated glass tubes for the drawin

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

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65 3A, 65 13, 65 60D, 65DIG7, 427167, B05D 306

Patent

active

041454588

ABSTRACT:
The change in the refractive index across the radius which is important for self-focussing fibre optic light conductors is obtained because in the plasma-activated CVD-method the oxygen content of the gas mixture and/or the temperature of the tube wall is continuously reduced during the coating procedure.

REFERENCES:
patent: 3655438 (1972-04-01), Sterling et al.
patent: 3980459 (1976-09-01), Li
patent: 3982916 (1976-09-01), Miller
patent: 4045198 (1977-08-01), Rau et al.

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