Patent ID: 7457103
Filing Date: 2008-11-25
Classification: H01G

Abstract:
1. A solid electrolytic capacitor including a device portion comprising (a) an anode member having a base member made of a sheet-like or a foil-like valve metal having an enlarged surface and a dielectric layer formed on a surface of the base member and made of an oxide of a metal component of the base member, (b) an insulator layer isolating the anode member into a first region and a second region, and (c) a cathode conductor layer and (d) an anode conductor layer formed on the first and the second regions, respectively, said device portion having two principal surfaces opposite to each other, wherein: at least one of the principal surfaces is provided with a composite layer composed of three layers including a first insulating resin layer, a positive electrode mounting terminal layer electrically connected to the anode conductor layer, and a second insulating resin layer; the second insulating resin layer being provided with a plurality of opening portions for partially exposing the positive electrode mounting terminal layer; the first insulating resin layer being provided with a plurality of first hole portions connecting the anode conductor layer with the positive electrode mounting terminal layer; the three layers being provided with a plurality of second hole portions penetrating the three layers to expose the cathode conductor layer and each having an inner wall surface coated with an insulating resin to prevent exposure of the positive electrode mounting terminal layer; the device portion being electrically connected to the outside through the first and the second hole portions.