US 12,014,884 B2
Electrode foil for electrolytic capacitor, electrolytic capacitor, and methods for manufacturing same
Mitsuhisa Yoshimura, Osaka (JP); Tatsuji Aoyama, Kyoto (JP); Naomi Kurihara, Osaka (JP); and Miwa Ogawa, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Aug. 4, 2020, as Appl. No. 16/984,800.
Application 16/984,800 is a continuation of application No. PCT/JP2019/006441, filed on Feb. 21, 2019.
Claims priority of application No. 2018-035678 (JP), filed on Feb. 28, 2018.
Prior Publication US 2020/0373090 A1, Nov. 26, 2020
Int. Cl. H01G 9/048 (2006.01); H01G 9/00 (2006.01); H01G 9/02 (2006.01); H01G 9/07 (2006.01)
CPC H01G 9/048 (2013.01) [H01G 9/0032 (2013.01); H01G 9/02 (2013.01); H01G 9/07 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electrode foil for an electrolytic capacitor, the electrode foil comprising:
an anode electrode body including a base material part having a porous body portion; and
a dielectric layer disposed on a surface of the porous body portion,
wherein:
the anode electrode body has a first main surface in which pores of the porous body portion are opened, a second main surface opposite to the first main surface, and an end surface connecting the first main surface and the second main surface,
the base material part further has a core material portion that is not porous, the core material portion being disposed consecutively with the porous body portion,
the dielectric layer is formed on the end surface in the porous body portion and on an end surface of the core material portion, and
in the porous body portion, a first film thickness of the dielectric layer in an end surface vicinity region is larger than a second film thickness of the dielectric layer in a deep inner region, the end surface vicinity region being a region within a predetermined distance from the end surface, the deep inner region being a region located away from the first main surface and at a central portion in a direction parallel to the first main surface.