公开(公告)号：US20180358181A1

公开(公告)日：2018-12-13

申请号：US16106210

申请日：2018-08-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MIWA OGAWA ,  AYUMI KOCHI ,  YASUHIRO TSUDA

IPC: H01G9/00 ,  H01G9/055 ,  H01G9/025 ,  H01G9/035 ,  H01G9/045 ,  C23C16/02 ,  C23C16/40 ,  C25D11/16

CPC classification number: H01G9/0032 ,  C23C16/0227 ,  C23C16/0272 ,  C23C16/40 ,  C23C16/45525 ,  C25D11/10 ,  C25D11/16 ,  H01G9/0036 ,  H01G9/025 ,  H01G9/035 ,  H01G9/04 ,  H01G9/042 ,  H01G9/045 ,  H01G9/055

Abstract: An electrolytic capacitor has an electrode foil that includes a metal foil containing a first metal, a first dielectric layer disposed on the metal foil, and a second dielectric layer disposed on the first dielectric layer. A method for manufacturing the electrolytic capacitor includes subjecting a roughening treatment to the metal foil and forming the second dielectric layer on a roughened surface of the metal foil by an atomic layer deposition method. The second dielectric layer contains an oxide of a second metal. The method further includes forming the first dielectric layer containing an oxide of the first metal between the metal foil and the second dielectric layer by subjecting the metal foil to an anodization treatment.