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AssigneeHughes Aircraft Company
InventorsLydia H. Simanyi, Robert A. Dunaetz, Steven R. Felstein, Rebecca Lee, Joan L. Lum
Estimating the term…
Predetermined desired areas of solvent-insoluble parylene coatings are removed from substrates made of materials such as plastics, metals, composites, or ceramics by contacting the areas to be removed with a substance that causes the parylene coating to loosen from the substrate sufficiently to permit physical removal, as by peeling or scraping. The substance used is tetrahydrofuran alone, or in combination with a carrier that does not react with the tetrahydrofuran, the parylene, or the substrate, and that makes the mixture sufficiently viscous for application to desired coating areas without affecting other areas contiguous thereto.
A method for removing at least one predetermined, desired area of a coating from a substrate having said coating thereon, said coating comprising at least one member selected from the group consisting of solvent-insoluble vacuum vapor-phase-deposited, polymerized para-xylylene and solvent-insoluble vacuum vapor-phase-deposited, polymerized, substituted derivatives of para-xylylene, said method comprising contacting said at least one area of the coating to be removed with a substance selected from the group consisting of tetrahydrofuran, dichloromethane, and toluene to loosen the coating on said area sufficiently to permit removal of said area of said coating by physical means.
Dependencies are inferred from the claim text.