Vapour deposited coating prodn., for e.g. capacitors - using intermediate metal layer, pref. of aluminium, to improve adhesion of main coating to insulating substrate

摘要

Prodn. of vapour deposited coatings on insulating substrate of halogen-contg. plastics comprises vapour deposition of an intermediate thin metal layer (I) which reacts with the halogen and improves adhesion of the main coating. (I) is pref. Al, pref. 5-50, esp. 20, angstroms thick. The substrate is prepd. of polytetrafluoroethylene-fluoroethylene propylene. The main coating is pref. of Ag. The process can be u sed for producing capacitors and electrosensitive metal-coated recording paper, in which case both layers can be of Al. The process allows both step to be carried out in the same chamber.