US 12,451,296 B2
Solid electrolytic capacitor
Hitoshi Fukui, Saga (JP); Katsuhiro Ogasawara, Kyoto (JP); and Atsushi Tanaka, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/549,635
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Mar. 3, 2022, PCT No. PCT/JP2022/009126
§ 371(c)(1), (2) Date Sep. 8, 2023,
PCT Pub. No. WO2022/191029, PCT Pub. Date Sep. 15, 2022.
Claims priority of provisional application 63/160,464, filed on Mar. 12, 2021.
Claims priority of application No. 2021-091791 (JP), filed on May 31, 2021.
Prior Publication US 2024/0161983 A1, May 16, 2024
Int. Cl. H01G 9/012 (2006.01); H01G 9/08 (2006.01); H01G 9/15 (2006.01); H01G 9/26 (2006.01)
CPC H01G 9/012 (2013.01) [H01G 9/08 (2013.01); H01G 9/15 (2013.01); H01G 9/26 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A solid electrolytic capacitor comprising:
at least one capacitor element including an anode part and a cathode part;
an anode lead terminal having an anode connection surface electrically connected to the anode part;
a cathode lead terminal having a cathode connection surface electrically connected to the cathode part; and
an exterior body covering the at least one capacitor element, wherein:
each of the anode lead terminal and the cathode lead terminal has a main surface and a side surface intersecting the main surface, and includes a buried part buried in the exterior body and an exposed part exposed from the exterior body,
the main surface of the anode lead terminal includes the anode connection surface, and the main surface of the cathode lead terminal includes the cathode connection surface,
in at least one lead terminal selected from the anode lead terminal or the cathode lead terminal, at least a part of the main surface of the exposed part is covered with a low-melting-point material,
in the side surface of the buried part, a first side surface region is not covered with the low-melting-point material, the first side surface region being a region away from a boundary between the buried part and the exposed part by more than 0.36 mm, and
in a main surface of the buried part:
a first main surface region is not covered with the low-melting-point material, the first main surface region being a region away from the boundary between the buried part and the exposed part by more than 0.15 mm; and
at least a part of a second main surface region is covered with the low-melting-point material, the second main surface region being a region in less than or equal to 0.15 mm from the boundary between the buried part and the exposed part.