Solid electrolytic capacitor with face-down terminals,...

Details Solid electrolytic capacitor with face-down terminals,... Solid electrolytic capacitor with face-down terminals,...

2006-12-12

2006-12-12

Thomas, Eric W. (Department: 2831)

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

C361S538000

Reexamination Certificate

active

07149077

ABSTRACT:
A face-down terminal solid electrolytic capacitor with the increased strength between electrode terminals and a casing resin is provided. The face-down terminal solid electrolytic capacitor has a structure where a mold structure in which a lead frame and capacitor elements fixed to the lead frame are overmolded with a casing resin is cut along cutting planes respectively passing through an anode terminal forming portion and a cathode terminal forming portion of the lead frame so that end surfaces of an anode terminal and a cathode terminal are exposed. In the lead frame, the anode terminal forming portion21and the cathode terminal forming portion22are provided so as to face each other. The anode terminal forming portion has a concave portion21jon the board mount side and a convex portion21ton the opposite side, which are formed by deforming part of the anode terminal forming portion in a direction perpendicular to a board mount surface. The concave portion is applied with plating. The convex portion has a flat portion parallel to the board mount surface and serving as a welding margin, an inclined portion21bcontinuous with the flat portion and inclined so as to approach the board mount surface as going away from the flat portion, and projecting portions21aon lateral sides of the convex portion. By cutting along a cutting plane23a, the anode terminal is formed so as to have a cut end surface, a fillet surface24a, and a board mount surface as exposed surfaces.

REFERENCES:
patent: 6808541 (2004-10-01), Maeda
patent: 6975503 (2005-12-01), Abe et al.
patent: 2004/0125542 (2004-07-01), Fujii et al.
patent: 2004-228424 (2004-08-01), None
patent: 2005-101418 (2005-04-01), None
patent: 2005-197457 (2005-07-01), None

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