US 12,293,877 B2
Electrolytic capacitor
Shinya Suzuki, Kyoto Fu (JP); Takahiro Kumakawa, Kyoto Fu (JP); and Junichi Kurita, Osaka Fu (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/772,057
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Oct. 29, 2020, PCT No. PCT/JP2020/040688
§ 371(c)(1), (2) Date Apr. 26, 2022,
PCT Pub. No. WO2021/085555, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-198874 (JP), filed on Oct. 31, 2019.
Prior Publication US 2022/0399168 A1, Dec. 15, 2022
Int. Cl. H01G 9/012 (2006.01); H01G 9/08 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/012 (2013.01) [H01G 9/08 (2013.01); H01G 9/15 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electrolytic capacitor, comprising:
an element stack including a plurality of capacitor elements stacked together;
a package body sealing the element stack;
a first external electrode;
a second external electrode; and
a plurality of third external electrodes, wherein:
each of the plurality of the capacitor elements includes:
an anode body having a porous portion at a surface,
a dielectric layer formed on at least part of a surface of the porous portion,
a cathode section covering at least part of the dielectric layer,
a first end at which the anode body is exposed, and
a second end covered with the cathode section,
at least an end surface of the first end is exposed from the package body,
the plurality of the capacitor elements includes a first capacitor element in which the first end faces a first surface of the package body, and a second capacitor element in which the first end faces a second surface different from the first surface of the package body,
in the element stack, the first capacitor element and the second capacitor element are stacked alternately,
the first end of the first capacitor element is electrically connected to the first external electrode, and the first end of the second capacitor element is electrically connected to the second external electrode,
the plurality of third external electrodes are electrically connected to the cathode section of the capacitor element,
at least one of the plurality of third external electrodes is placed closer to the first external electrode than the second external electrode,
the electrolytic capacitor has a top surface, a bottom surface, and a pair of side surfaces opposite to each other and each connecting between the top surface and the bottom surface,
as viewed from exterior of the electrolytic capacitor, the plurality of third external electrodes are exposed on the pair of side surfaces and on the bottom surface of the electrolytic capacitor, with a plurality of exposed regions, and
in each of the plurality of exposed regions, the plurality of third external electrodes are exposed continuously along the package body from one of the pair of side surfaces to the bottom surface of the electrolytic capacitor, but are not exposed continuously from the bottom surface to the other of the pair of side surface of the electrolytic capacitor, and the plurality of third external electrodes extend, at the one of the pair of side surfaces, from the bottom surface to the top surface so as to cover only a part of the top surface.