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US 8,896,986 B2Granted
Method of improving electromechanical integrity of cathode coating to cathode termination interfaces in solid electrolytic capacitors
AssigneeKemet Electronics Corporation
InventorsAntony P. Chacko, John E. McConnell, Philip M. Lessner, Randolph S. Hahn, John Bultitude
Life of this patent
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Abstract
A solid electrolytic capacitor with an anode and a dielectric on the anode. A cathode is on the dielectric and a conductive coating on the dielectric. A cathode lead is electrically connected to the conductive coating by an adhesive selected from the group consisting of a transient liquid phase sinterable material and polymer solder.
Claims22
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric on said anode;
- a cathode on said dielectric;
- a conductive coating directly on said cathode;
- and
- a plating directly on said conductive coating wherein said plating is selected from nickel plating and silver plated with nickel;
- and
- a cathode lead electrically connected by metallurgical bonds to said plated metal by a transient liquid phase sinterable material wherein said transient liquid phase sintering adhesive comprises at least one member selected from the group consisting of copper, silver, aluminum, gold, platinum, palladium, beryllium, rhodium nickel, cobalt, iron and molybdenum or an alloy of said member.
5 more elements
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric on said anode;
- a cathode on said dielectric;
- a conductive coating directly on said cathode;
- and a plating directly on said conductive coating wherein said plating is selected from nickel plating and silver plated with nickel;
- and
- a cathode lead electrically connected by metallurgical bonds to said plated metal by a transient liquid phase sinterable material wherein said transient liquid phase sintering adhesive comprises at least one member selected from the group consisting of tin, antimony, bismuth, cadmium, zinc, gallium, indium, tellurium, mercury, thallium, selenium and polonium or an alloy said member.
4 more elements
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric on said anode;
- a cathode on said dielectric;
- a conductive coating directly on said cathode;
- and a plating directly on said conductive coating wherein said plating is selected from nickel plating and silver plated with nickel;
- and
- a cathode lead electrically connected by metallurgical bonds to said plated metal by a transient liquid phase sinterable material wherein said transient liquid phase sintering adhesive does not comprise lead.
4 more elements
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric on said anode;
- a cathode on said dielectric wherein said cathode comprises a conductive polymer;
- a conductive coating directly on said cathode;
- and a plated nickel directly on said conductive coating;
- and
- a cathode lead electrically connected to said conductive coating by a metallurgical bond formed from a transient liquid phase sinterable material.
4 more elements
Dependencies are inferred from the claim text.