Use of pad printing in the manufacture of capacitors
AssigneeWilson Greatbatch Technologies, Inc.
InventorsKeith Seitz, Ashish Shah, Barry Muffoletto, Wolfram Neff, Douglas Eberhard
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Abstract
Deposition of a metal-containing reagent solution or suspension onto a conductive substrate by various pad-printing techniques is described. This results in a pseudocapacitive oxide coating, nitride coating, carbon nitride coating, or carbide coating having an acceptable surface area for incorporation into an electrolytic capacitor, such as one having a tantalum anode.
Claims20
A capacitor, which comprises:
- a) an anode electrode;
- b) a cathode electrode comprising a cathode active material characterized as having been transferred as a reagent ink from a printing pad to a conductive substrate;
- and
- c) an electrolyte in contact with the anode and cathode electrodes.
A reagent ink for contacting to a conductive substrate for forming an electrode for an electrical energy storage device, the reagent ink comprising:
- a) an active material;
- b) a solvent for the active material;
- and
- c) a binder selected from the group consisting of ethyl cellulose, acrylic resin, polyvinyl alcohol, polyvinyl butyral and a poly(alkylene carbonate) having the general formula R—O—C(═O)—O with R=C1 to C5.
A reagent ink for contacting to a substrate for forming an electrode for an electrical energy storage device, the reagent ink comprising:
- a) an active material comprising an oxide of ruthenium or a precursor thereof;
- b) a solvent for the active material;
- and
- c) an organic binder that decomposes into carbon dioxide and water upon being heated to a decomposition temperature of up to about 250° C.
Dependencies are inferred from the claim text.