Compressible intermediate layer for encapsulated electrical devices
AssigneeP. R. Mallory & Co. Inc.
InventorsGerald A. Voyles, William D. Davies
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Abstract
An electrical device is provided with a compressible intermediate layer between an active electrical component and an exterior protective coating. The intermediate layer includes a substantially solid filler material in a resin binder material. The compressive intermediate layer helps to protect a fragile electrical component from stresses resulting from possible shrinkage of the protective coating during curing or hardening, from expansion or contraction of the protective coating during temperature cycling and from the adhesive nature of the protective coating.
Claims12
A compressible and electrically insulative intermediate layer between a surface of an electrical component means and a protective coating, the intermediate layer including resin binder with void areas and solid filler material dispersed in the binder and over the surface of the electrical component means to help relieve compressive forces and other stresses that may be experienced by the electrical component means, the intermediate layer consisting of an effective amount up to about 25 wt.%, the remainder essentially solid filler selected from asbestos, mica, fibrous glass, calcined kaolin, silicon dioxide, nylon fiber, orlon, talc or mixtures thereof.
Dependencies are inferred from the claim text.