Solid electrolytic capacitor and manufacturing method for the same

A solid electrolytic capacitor comprising:

• an anode member that uses a plate-like or foil-like valve metal as its base material and has a layer formed of an oxide of the valve metal on the surface thereof;
• a cathode conductor layer that is formed to cover the area of the surface of the anode member except for a predetermined area, and includes a solid electrolyte layer and a layer of a conductive adhesive agent;
• an anode terminal conductively secured to a predetermined area of one surface of the anode member, and formed to provide external electrical connection;
• a first metal plate or metal foil that is bonded to a conductive adhesive agent and functions as a first cathode terminal formed on the one surface of the cathode conductor layer for external electrical connection such that it covers the one surface of the cathode conductor layer;
• and
• a second metal plate or metal foil that is bonded to a conductive adhesive agent and formed on the other surface of the cathode conductor layer such that it covers the other surface of the cathode conductor layer,
• wherein the ventilation between the anode member and the outside is blocked by the first metal plate or metal foil and the second metal plate or metal foil.

A method for manufacturing a solid electrolytic capacitor having an anode terminal and a cathode terminal for external electrical connection that are formed on one surface of a plate-like or foil-like anode member, the manufacturing method including:

• a first step of forming the anode member by increasing the area of a plate-like or foil-like valve metal and depositing a layer of oxide of a base material valve metal on the surface of the increased area;
• a second step of forming a cathode conductor layer formed such that it covers the area of the one surface of the anode member except for the portion where the anode terminal is secured;
• a third step of forming electroconductively the anode terminal to the portion of the anode member that is not covered by the cathode conductor layer;
• a fourth step of bonding, to one surface of the cathode conductor layer, a first metal plate or metal foil that has an area larger than the area of the cathode conductor layer on that surface side and functions as the cathode terminal;
• and
• a fifth step of bonding, to the other surface of the cathode conductor layer, a second metal plate or metal foil having an area larger than the area of the cathode conductor layer on that surface side.