Method of protecting a capacitor
AssigneeHamilton Sundstrand Corporation
InventorTed R. Schnetker
Life of this patent
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Abstract
An electric device includes an electric element, such as a wound film capacitor, with power input and output leads. The electric element includes a coating layer of parylene that provides moisture resistance and low gas and moisture permeability to protect the electric element from short and long term moisture degradation effects. A known case layer is located adjacent to the coating layer. The case layer is a metal, epoxy-based, silicone-based, or polymer material that encapsulates the coating layer and the electric element to protect the coating layer and electric element from physical damage.
Claims10
A method of protecting a capacitor comprising the steps:
- (a) vapor depositing a poly-para-xylylene coating layer entirely on a wound film capacitor;
- (b) hermetically sealing a lead wire that extends from the wound film capacitor at least partially within the poly-para-xylylene coating layer;
- (c) depositing a case layer on the poly-para-xylylene coating layer;
- and
- (d) sealing the lead wire at least partially within the case layer.
Dependencies are inferred from the claim text.