COATING PROCESS

摘要

A method of masking a workpiece (21) to prevent the adhesion of a deposited tightly adhering conformal coating (28) formed from the condensation of a vaporous diradical such as paraxylylene on selected portions of the workpiece. The process requires the covering of those areas of the workpiece to which adhesion is not desired with a non-polymerizing hydrocarbon (26) and placing the covered area in close contact with an open cellular material (27) containing a predominance of interconnecting cells which provide a large surface area for condensation of the unwanted condensate of the diradical, exposing the workpiece (21) to the vaporous diradical, removing the workpiece (21) from the open cellular material (27) and immersing the workpiece in a solvent for swelling and dissolving the hydrocarbon (26) covering.