US 11,915,885 B2
Electrode foil for electrolytic capacitor, electrolytic capacitor, and method for manufacturing electrolytic capacitor
Miwa Ogawa, Osaka (JP); and Naomi Kurihara, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/637,199
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Sep. 4, 2020, PCT No. PCT/JP2020/033684
§ 371(c)(1), (2) Date Feb. 22, 2022,
PCT Pub. No. WO2021/065356, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-180470 (JP), filed on Sep. 30, 2019.
Prior Publication US 2022/0301786 A1, Sep. 22, 2022
Int. Cl. H01G 9/07 (2006.01); H01G 9/00 (2006.01); H01G 9/035 (2006.01); H01G 9/042 (2006.01)
CPC H01G 9/07 (2013.01) [H01G 9/0032 (2013.01); H01G 9/035 (2013.01); H01G 9/042 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electrode foil for an electrolytic capacitor, the electrode foil comprising:
an anode body including aluminum;
a first dielectric layer covering at least a part of the anode body and including Al2O3; and
a second dielectric layer covering at least a part of the first dielectric layer and including SiO2, wherein:
a thickness T2 of the second dielectric layer is smaller than a thickness T1 of the first dielectric layer,
a total thickness of the thickness T1 of the first dielectric layer and the thickness T2 of the second dielectric layer ranges from 7 nm to 12.5 nm, inclusive, and
a ratio T1/T2 of the thickness T1 of the first dielectric layer to the thickness T2 of the second dielectric layer is more than 1 and less than or equal to 20.