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US 11,114,250 B2Granted
Solid electrolytic capacitor formed from conductive polymer particles
AssigneeAVX Corporation
InventorsKiyofumi Aoki, Jan Petrzilek
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Abstract
A solid electrolytic capacitor containing a capacitor element is provided. The capacitor element contains a sintered porous anode body, a dielectric that overlies the anode body, a solid electrolyte that overlies the dielectric that includes conductive polymer particles that contain a complex formed from a thiophene polymer and a copolymer counterion, and an external polymer coating that overlies the solid electrolyte and includes conductive polymer particles.
Claims29
A solid electrolytic capacitor comprising a capacitor element that contains:
- a sintered porous anode body;
- a dielectric that overlies the anode body;
- a solid electrolyte that overlies the dielectric, wherein the solid electrolyte includes conductive polymer particles that contain a complex formed from a thiophene polymer and a copolymer counterion, wherein the copolymer counterion contains a first repeating unit derived from a sulfonic acid monomer and a second repeating unit derived from a (meth)acrylate monomer, and wherein the weight ratio of the sulfonic acid monomer to the (meth)acrylate monomer is from about 0.5:1 to about 30:1;
- and
- an external polymer coating that overlies the solid electrolyte and includes conductive polymer particles.
2 more elements
Dependencies are inferred from the claim text.