Solid electrolytic capacitor, electric circuit, and solid electrolytic capacitor mounting structure
A solid electrolytic capacitor (A 1 ) includes a porous sintered body ( 10 ) of metal particles or conductive ceramic particles, anode wires ( 11 A, 11 B) partially inserted in the porous sintered body ( 10 ), an anode terminal provided by portions of the anode wires ( 11 A, 11 B) which project from the porous sintered body ( 10 ), and a cathode ( 30 ) formed on an obverse surface of the porous sintered body ( 10 ). The anode terminal includes a first and a second anode terminals ( 11 a, 11 b ), and circuit current flows from the first anode terminal ( 11 a ) toward the second anode terminal ( 11 b ) through the porous sintered body ( 10 ). Therefore, noise cancellation property can be enhanced with respect to a wide frequency band, and large electric power can be supplied with high responsiveness. In a circuit using the solid electrolytic capacitor (A 1 ), the space efficiency on aboard can be enhanced, and the cost can be reduced.
1. A solid electrolytic capacitor comprising:
a porous sintered body of metal particles or conductive ceramic particles, the sintered body having a first surface and a second surface opposite to the first surface;
an anode partially inserted in the porous sintered body and partially projecting from the porous sintered body between the first and second surfaces;
a first cathode plate formed on the first surface of the porous sintered body;
a second cathode plate formed on the second surface of the porous sintered body and separated from the first cathode plate by intervention of the porous sintered body; and
a shorting conductive member for shorting between the first and second cathode plates.
2. The solid electrolytic capacitor according to claim 1 , wherein the anode comprises a plurality of anode wires.
3. The solid electrolytic capacitor according to claim 1 , wherein the anode comprises an anode wire having opposite ends projecting from the porous sintered body.
4. The solid electrolytic capacitor according to claim 1 , wherein the porous sintered body is made of niobium particles or niobium oxide particles.
5. The solid electrolytic capacitor according to claim 1 , wherein the porous sintered body is in a form of a flat plate.
6. The solid electrolytic capacitor according to claim 5 , wherein the porous sintered body includes a side surface standing in a thickness direction between the first and second surfaces; and
wherein the anode projects from the side surface.
7. The solid electrolytic capacitor according to claim 5 , wherein the porous sintered body includes at least two side surfaces standing in a thickness direction between the first and second surfaces; and
wherein the anode projects from the side surfaces.
8. The solid electrolytic capacitor according to claim 5 , wherein the anode is flattened in section.
9. The solid electrolytic capacitor according to claim 1 , wherein the anode includes a first anode terminal and a second anode terminal, the first anode terminal being higher in equivalent series inductance than the second anode terminal.
10. A solid electrolytic capacitor comprising:
a porous sintered body of metal particles or conductive ceramic particles, the sintered body having a first surface and a second surface opposite to the second surface;
an anode partially inserted in the porous sintered body;
a first and a second anode terminals provided by portions of the anode which project from the porous sintered body; and
a cathode formed on an obverse surface of the porous sintered body;
a first and a second cathode terminals electrically connected to the cathode;
wherein circuit current flows from the first anode terminal toward the second anode terminal through the porous sintered body;
wherein circuit current flows from the first cathode terminal toward the second cathode terminal through the cathode;
wherein the first cathode terminal is higher in equivalent series inductance than the second cathode terminal.
11. A solid electrolytic capacitor comprising:
a porous sintered body of metal particles or conductive ceramic particles, the sintered body having a first surface and a second surface opposite to the second surface;
an anode partially inserted in the porous sintered body;
a first and a second anode terminals provided by portions of the anode which project from the porous sintered body; and
a cathode formed on an obverse surface of the porous sintered body;
wherein circuit current flows from the first cathode terminal toward the second cathode terminal through the cathode;
wherein the cathode includes a pair of metal members sandwiching the porous sintered body; and
wherein at least one of the paired metal members comprises a metal case accommodating the porous sintered body.