PROTECTING RESIN-ENCAPSULATED COMPONENTS

摘要

A method of protecting surface mount capacitors (40) from moisture and oxygen corrosion by applying a thermally curable pre-coat resin (48) to a portion of the terminals (41, 43) of a capacitor (40) and encapsulating the capacitor element(s) (42) with a protective resin (46). The pre-coat resin (48) is substantially rigid at ambient temperatures and flexible at elevated temperatures and is preferably a lactone-containing epoxy resin. The pre-coat resin (48) may be applied to a solder coating-free portion (50) of the terminals (41, 43) by brush or wiper prior to encapsulating the capacitor element(s) (42) with the protective resin (46).