B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
117/64
B05D 1/32 (2006.01) B05D 7/24 (2006.01) H05K 3/28 (2006.01) H05K 13/00 (2006.01)
Patent
CA 1153256
ABSTRACT COATING PROCESS MASK This invention describes a method of masking a workpiece to prevent the adhesion of a deposited tightly adhering conformal coating formed from the condensation of a vaporous diradical such as paraxylylene on selected portions of the workpiece. Specifically the process of the in- vention requires the covering of the areas of the workpiece, to which adhesion is not desired, with a non-polymerizing hydrocarbon and placing the covered area in close contact with an open cellular material containing a predominance of interconnecting cells which provide a large surface area for condensation of the unwanted con- densate of the diradical, exposing the workpiece to the vaporous diradical, removing the workpiece from the open cellular material and immersing the workpiece in a solvent for swelling and dis- solving the hydrocarbon covering.
352401
Clark Roger J.
Kennison Robert E.
International Business Machines Corporation
Saunders Raymond H.
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