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Materials and methods for improving corner and edge coverage of solid electrolytic capacitors

  • US 9,030,807 B2
  • Filed: 02/15/2012
  • Issued: 05/12/2015
  • Est. Priority Date: 02/15/2011
  • Status: Active Grant
First Claim
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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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