Coating processes – Coating by vapor – gas – or smoke – Organic coating applied by vapor – gas – or smoke
Patent
1979-07-31
1981-11-10
Lusignan, Michael R.
Coating processes
Coating by vapor, gas, or smoke
Organic coating applied by vapor, gas, or smoke
427 99, 427255, 427259, 427282, 427336, 427416, C23C 1300
Patent
active
042998662
ABSTRACT:
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 invention 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 provides a large surface area for condensation of the unwanted condensate 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 dissolving the hydrocarbon covering.
REFERENCES:
patent: 2991188 (1961-07-01), Wing et al.
patent: 3055777 (1962-09-01), Grad
patent: 3309227 (1967-03-01), McTeague
patent: 3892892 (1975-07-01), Hofer
patent: 3895135 (1975-07-01), Hofer
patent: 3900600 (1975-08-01), Spaulding
patent: 3928661 (1975-12-01), Higbee et al.
patent: 4127680 (1978-11-01), Shirn et al.
IBM Technical Disclosure Bulletin, "Protecting Module Pins from Resin Contamination", Nov. 1970, vol. 13, #6, p. 1608.
Clark Roger J.
Kennison Robert E.
Bell Janyce A.
International Business Machines - Corporation
Lusignan Michael R.
Thornton Francis J.
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