Protecting resin-encapsulated components

Electricity: electrical systems and devices – Electrolytic systems or devices – Solid electrolytic capacitor

Reexamination Certificate

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C361S523000, C361S535000, C438S396000

Reexamination Certificate

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06845004

ABSTRACT:
A method of protecting surface mount capacitors from moisture and oxygen corrosion by applying a thermally curable pre-coat resin to a portion of the terminals of a capacitor and encapsulating the capacitor element(s) with a protective resin. The pre-coat resin is substantially rigid at ambient temperatures and flexible at elevated temperatures and is preferably a lactone-containing epoxy resin. The pre-coat resin may be applied to a solder coating-free portion of the terminals by brush or wiper prior to encapsulating the capacitor element(s) with the protective resin.

REFERENCES:
patent: 5206798 (1993-04-01), Sugisaki
patent: 5629830 (1997-05-01), Yamagami et al.
patent: 6229687 (2001-05-01), Wada et al.
patent: 6324051 (2001-11-01), Igaki et al.
patent: 6370016 (2002-04-01), Stevens et al.
patent: 6552896 (2003-04-01), Igaki et al.
patent: 6741451 (2004-05-01), Aoyama
patent: 6798645 (2004-09-01), Melody et al.

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