Process for conformal coating of printed circuit boards
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United States of America Patent
Stats
-
Apr 7, 1992
Grant Date -
N/A
app pub date -
Feb 13, 1990
filing date -
Feb 13, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of applying a conformal coating to a printed circuit board and components attached thereto while leaving selected components attached thereto uncoated, comprises the steps of providing a printed circuit board having a multiplicity of components attached thereto, including selected components that are not to be coated; enclosing the selected components within conductive protective enclosures sized to enclose the selected components therein and thereby protect those components from the intrusion of conformal coating material, the enclosures having sufficient electrical conductivity to discharge electrostatic charges therefrom when one of the enclosures is contacted by an electrically conductive medium, thereby protecting the components attached to the printed circuit board from damage due to the discharge of electrostatic charges from the enclosures; applying a conformal coating to the printed circuit board, thereby conformal coating the enclosures and the components which are not protected by the enclosures; and removing the coated enclosures from the selected components.
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