Method of coating printed circuit board
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United States of America Patent
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May 21, 2002
Issued Date -
N/A
app pub date -
Apr 19, 1999
filing date -
Dec 11, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A conformal coating and method for applying same to a printed electrical circuit board, components and leads for providing corrosion resistance. In a preferred embodiment, the conformal coating comprises a first coating layer of parylene which is vacuum deposited and removably bonded onto an ultra-clean surface of a printed circuit board including attached components and leads. Additionally, a second coating layer of a corrosion inhibiting viscous fluid is deposited onto the first coating layer to form a continuous, stratified, conformal coating which is sealed and corrosion resistant.
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