Solid electrolytic capacitor and method for making the same
AssigneeRohm Co., Ltd.
InventorsMakoto Aoyama, Hideki Ando
Life of this patent
Estimating the term…
Abstract
A solid electrolytic capacitor includes a capacitor element, an anode terminal, a cathode terminal, and a sealing resin covering the capacitor element. The anode terminal includes a support portion for supporting the capacitor element, and an anode standing portion formed upright relative to the support portion. The capacitor element includes an anode wire projecting from a porous sintered body. The anode wire is placed on the upper end face of the anode standing portion. The anode wire and the anode standing portion have parts that are exposed from the sealing resin and covered by an electrically conductive anode terminal covering layer for ensuring electrical connection between the anode wire and the anode terminal.
Claims28
A solid electrolytic capacitor comprising:
- a capacitor element including a porous sintered body made of a valve metal, an anode wire partially inserted in the porous sintered body, a dielectric layer covering the porous sintered body, and a cathode portion covering the dielectric layer;
- an anode terminal including an anode support portion supporting the capacitor element, and an anode standing portion standing on the anode support portion in a thickness direction of the capacitor element, the anode wire being disposed on the anode standing portion;
- a cathode terminal including a cathode support portion supporting the capacitor element;
- a sealing resin covering the capacitor element;
- and
- an electrically conductive anode terminal covering layer,
- wherein the anode terminal and the cathode terminal are made from a single electrically conductive base member,
- each of the anode wire, the anode support portion, the anode standing portion and the cathode support portion comprises an exposed part exposed from the sealing resin, and
- the anode terminal covering layer is in direct contact with the exposed part of the anode wire and the exposed part of the anode standing portion.
A method for making a solid electrolytic capacitor, the method comprising:
- forming a first recess and a second recess in a base member obverse surface of an electrically conductive base member;
- dividing the first recess into a first region and a second region by removing a part of the base member;
- placing a capacitor element to span the first region and the second region, the capacitor element comprising a porous sintered body made of a valve metal, an anode wire partially inserted in the porous sintered body, a dielectric layer covering the porous sintered body, and a cathode portion covering the dielectric layer;
- forming a sealing resin covering the capacitor element;
- cutting the base member along a first line and a second line that flank the porous sintered body to obtain a piece of the base member, the first line being disposed between the first recess and the second recess;
- and
- forming an electrically conductive covering member held in direct contact with an exposed part of the piece of the base member and with an exposed part of the anode wire,
- wherein the placing of the capacitor element comprises fixing the anode wire to a part of the base member obverse surface that is opposite to the first recess with respect to the second recess.
A solid electrolytic capacitor, comprising:
- a capacitor element including a porous sintered body made of a valve metal, an anode wire partially inserted in the porous sintered body, a dielectric layer covering the porous sintered body, and a cathode portion covering the dielectric layer;
- an anode terminal including an anode support portion supporting the capacitor element, and an anode standing portion standing on the anode support portion in a thickness direction of the capacitor element, the anode wire being disposed on the anode standing portion;
- a cathode terminal including a cathode support portion supporting the capacitor element;
- a sealing resin covering the capacitor element;
- and
- an electrically conductive anode terminal covering layer,
- wherein the anode terminal and the cathode terminal are made from a single electrically conductive base member,
- each of the anode wire, the anode support portion, the anode standing portion and the cathode support portion comprises an exposed part exposed from the sealing resin, and
- the anode terminal covering layer is in contact with the exposed parts of the anode wire and the anode standing portion,
- wherein the sealing resin includes a resin obverse surface and a resin reverse surface that face away from each other in the thickness direction of the capacitor element, and the resin reverse surface is flush with the exposed part of the anode support portion and the exposed part of the cathode support portion.
Dependencies are inferred from the claim text.