Patent ID: 6796270
Filing Date: 2004-09-28
Classification: C03B,C23C,H01J,H05H

Abstract:
A device for depositing a coating on the inside of a substrate tube comprising:a) an oven for heating the substrate tube, the oven comprising two end walls each having inner and outer surfaces and an opening between the inner and outer surfaces through which the substrate tube can be mounted; and b) an applicator located within the oven and positioned to surround a longitudinal axis of the substrate tube for generating a plasma zone from a mixture of gases in the tube by application of energy, the applicator comprising a body and at least one extension positioned about the longitudinal axis of the substrate tube and extending from the body, wherein both the body and the at least one extension are used to direct energy into the tube and the at least one extension has an outer profile capable of moving at least partially into the opening in the end wall of the oven.