US 12,293,881 B2
Electrolytic capacitor and method for producing same
Shinya Suzuki, Kyoto (JP); Masaya Kiso, Hyogo (JP); and Kazuaki Aoyama, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/759,915
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 19, 2021, PCT No. PCT/JP2021/006496
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/172236, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2020-034476 (JP), filed on Feb. 28, 2020; and application No. 2020-219271 (JP), filed on Dec. 28, 2020.
Prior Publication US 2023/0062760 A1, Mar. 2, 2023
Int. Cl. H01G 9/15 (2006.01); H01G 9/012 (2006.01); H01G 9/10 (2006.01); H01G 9/00 (2006.01); H01G 9/025 (2006.01); H01G 9/07 (2006.01)
CPC H01G 9/15 (2013.01) [H01G 9/012 (2013.01); H01G 9/10 (2013.01); H01G 9/0029 (2013.01); H01G 9/025 (2013.01); H01G 9/07 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising:
an element stack body including a plurality of capacitor elements;
an exterior body that seals the element stack body;
a first external electrode; and
a second external electrode,
wherein:
each of the plurality of capacitor elements includes:
an anode body having a porous part on a surface of the anode body;
a dielectric layer disposed on at least a part of a surface of the porous part; and
a cathode part covering at least a part of the dielectric layer,
the exterior body includes a first principal surface, a second principal surface intersecting the first principal surface, a third principal surface opposite to the first principal surface, and a fourth principal surface opposite to the second principal surface,
in at least one first capacitor element among the plurality of capacitor elements, an end surface of an end of the anode body is exposed from the exterior body at least on the first principal surface to be electrically connected to the first external electrode, and an end surface of an end of the cathode part is exposed from the exterior body at least on the second principal surface to be electrically connected to the second external electrode,
the end of the anode body includes a pair of first ends opposite to each other in a first direction,
the end of the cathode part includes a pair of second ends opposite to each other in a second direction intersecting the first direction,
in the at least one the first capacitor element, a first end surface A that is one end surface of the pair of first ends is exposed from the exterior body on the first principal surface to be electrically connected to the first external electrode, and a second end surface A that is one end surface of the pair of second ends is exposed from the exterior body on the second principal surface to be electrically connected to the second external electrode,
the plurality of capacitor elements further include at least one third capacitor element,
a fourth end surface A that is another end surface of the pair of second ends of the at least one first capacitor element is not exposed from the exterior body on the fourth principal surface,
in the at least one third capacitor element, a second end surface C that is one end surface of the pair of second ends is not exposed from the exterior body on the second principal surface, and a fourth end surface C that is another end surface of the pair of second ends is exposed from the exterior body on the fourth principal surface,
in the element stack body, the at least one first capacitor element and the at least one third capacitor element are alternately stacked, and
the fourth end surface C of the at least one third capacitor element is electrically connected to a fourth external electrode.