US 12,340,953 B2
Solid electrolytic capacitor and method for manufacturing solid electrolytic capacitor with improved anode lead-out wire
Kenji Araki, Sendai (JP); and Akihiro Kawai, Sendai (JP)
Assigned to TOKIN CORPORATION, Shiroishi (JP)
Filed by TOKIN Corporation, Shiroishi (JP)
Filed on Feb. 1, 2023, as Appl. No. 18/163,150.
Claims priority of application No. 2022-026354 (JP), filed on Feb. 24, 2022.
Prior Publication US 2023/0268135 A1, Aug. 24, 2023
Int. Cl. H01G 9/04 (2006.01); H01G 9/00 (2006.01); H01G 9/08 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/04 (2013.01) [H01G 9/0036 (2013.01); H01G 9/08 (2013.01); H01G 9/15 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A solid electrolytic capacitor comprising:
an anode lead-out wire; and
a capacitor element in which the anode lead-out wire is embedded, wherein
a cross section of at least a part of the anode lead-out wire in a direction in which the anode lead-out wire is extended has a flat shape,
a recess provided in a central part, a first linear part that is extended outward from one side of the recess, and a second linear part that is extended outward from another side of the recess are formed in at least one of an upper surface and a lower surface of the anode lead-out wire having the flat shape,
each of the recesses has a cross-sectional shape that is gradually deepened toward the central part of each of the recesses,
when the distance between one side of the recess and the other side of the recess is denoted by A and the distance from an outer edge part of the first linear part to an outer edge part of the second linear part is denoted by B, the value of A/B is 0.1 or larger and 0.9 or smaller, and
each of side parts of the anode lead-out wire held between the upper surface and the lower surface of the anode lead-out wire have a curved shape that bulges outward.