Solid electrolytic capacitor containing a protective adhesive layer
AssigneeAVX Corporation
InventorMartin Biler
Life of this patent
Estimating the term…
Abstract
An electrolytic capacitor containing a protective adhesive layer positioned between the dielectric layer and the solid electrolyte layer (e.g., a conductive polymer layer, manganese dioxide) is generally disclosed. The protective adhesive layer can include a polymer having a repeating unit with a functional hydroxyl group, such as poly(vinyl alcohol). For instance, the polymer can be at least 90 mole % hydrolyzed. The polyvinyl alcohol can be a co-polymer of vinyl alcohol and a monomer, such as an acrylic ester like a methacrylic ester (e.g., methyl methacrylate).
Claims42
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric layer overlying the anode;
- a protective adhesive layer overlying the dielectric layer, wherein the protective adhesive layer comprises a polymer having a repeating unit with a functional hydroxyl group, wherein the polymer has a degree of hydrolysis of at least about 90 mole %;
- and
- a solid electrolyte layer overlying the protective adhesive layer.
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric layer overlying the anode;
- a protective adhesive layer overlying the dielectric layer, wherein the protective adhesive layer comprises a polymer having a repeating unit with a functional hydroxyl group;
- and
- a solid electrolyte layer overlying the protective adhesive layer, wherein the solid electrolyte layer comprises a conductive polymer, and wherein the conductive polymer is polymerized in the presence of less than a stoichiometric amount of the oxidative polymerization catalyst.
A solid electrolytic capacitor comprising:
- an anode containing a valve metal;
- a dielectric layer overlying the anode;
- a protective adhesive layer overlying the dielectric layer, wherein the protective adhesive layer comprises a vinyl alcohol copolymer, wherein the vinyl alcohol copolymer is at least 90 mole % hydrolyzed;
- and
- a solid electrolyte layer overlying the protective adhesive layer.
A solid electrolytic capacitor comprising:
- an anode;
- a dielectric layer overlying the anode;
- a protective adhesive layer overlying the dielectric layer, wherein the protective adhesive layer comprises a polymer having a repeating unit with a functional hydroxyl group, wherein the polymer is a vinyl alcohol co-polymer formed from a monomer that includes an acrylic ester, methacrylic ester, or a combination thereof;
- and
- a solid electrolyte layer overlying the protective adhesive layer, wherein the solid electrolyte layer comprises a conductive polymer.
Dependencies are inferred from the claim text.