Materials and methods for improving corner and edge coverage of solid electrolytic capacitors
First Claim
Patent Images
1. A capacitor comprising:
- an anode,a dielectric on said anode; and
a conductive polymeric cathode on said dielectric wherein said conductive polymeric cathode comprises a coverage enhancement catalyst wherein said coverage enhancement catalyst is defined by Formula 2;
R2—
SO3−
R3NH3+wherein R2 is an aliphatic hydrocarbon with up to 18 carbons, unsubstituted phenyl or a phenyl substituted with halogen, —
OH, —
COOH, C1-C12 alkyl, C1-C4 alkoxy, C1-C4 alkyl-CONH, phenyl-CONH, NO2, or benzyl;
naphthyl which is unsubstituted or substituted with halogen, C1-C12 alkyl, C1-C4 alkoxy, C5-C6 cycloalkyl, C7-C9 aralkyl, camphoryl, —
CF3, —
CCl3, —
F or —
NH2;
R3 is aliphatic hydrocarbon with up to 18 carbons, unsubstituted phenyl or a phenyl substituted with halogen, C1-C12 alkyl, C1-C4 alkoxy, C1-C4 alkyl-CONH, phenyl-CONH, NO2, or benzyl;
naphthyl which is unsubstituted or substituted with halogen, C1-C12 alkyl, C1-C4 alkoxy, C5-C6 cycloalkyl, C7-C9 aralkyl, camphoryl, —
CF3, —
CCl3, —
F or —
NH2.
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Abstract
A process for preparing a solid electrolytic capacitor comprising application of coverage enhancing catalyst followed by application of a conducting polymer layer wherein the conductive polymeric cathode comprises the coverage enhancement catalyst wherein the conductive polymeric layer has improved coverage of the corners and edges. Coverage enhancing catalyst is removed after coating and curing.
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Citations
8 Claims
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1. A capacitor comprising:
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an anode, a dielectric on said anode; and a conductive polymeric cathode on said dielectric wherein said conductive polymeric cathode comprises a coverage enhancement catalyst wherein said coverage enhancement catalyst is defined by Formula 2;
R2—
SO3−
R3NH3+wherein R2 is an aliphatic hydrocarbon with up to 18 carbons, unsubstituted phenyl or a phenyl substituted with halogen, —
OH, —
COOH, C1-C12 alkyl, C1-C4 alkoxy, C1-C4 alkyl-CONH, phenyl-CONH, NO2, or benzyl;
naphthyl which is unsubstituted or substituted with halogen, C1-C12 alkyl, C1-C4 alkoxy, C5-C6 cycloalkyl, C7-C9 aralkyl, camphoryl, —
CF3, —
CCl3, —
F or —
NH2;R3 is aliphatic hydrocarbon with up to 18 carbons, unsubstituted phenyl or a phenyl substituted with halogen, C1-C12 alkyl, C1-C4 alkoxy, C1-C4 alkyl-CONH, phenyl-CONH, NO2, or benzyl;
naphthyl which is unsubstituted or substituted with halogen, C1-C12 alkyl, C1-C4 alkoxy, C5-C6 cycloalkyl, C7-C9 aralkyl, camphoryl, —
CF3, —
CCl3, —
F or —
NH2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification