Title:
ELECTROLYTIC CAPACITOR ELEMENT
Document Type and Number:
WIPO Patent Application WO/2023/090141
Kind Code:
A1
Abstract:
An electrolytic capacitor element 1 comprises: a positive electrode 10 that is formed from a valve-action metal substrate 11, and has a leading end surface 10a and a base end surface 10b; a dielectric layer 20 provided on at least one of main surfaces 10c, 10d of the positive electrode 10, excluding at least the base end surface 10b; a mask layer 30 made from an insulating material and provided on the dielectric layer 20 along the base end surface 10b; and a negative electrode 40 provided on the dielectric layer 20 more on the leading end surface 10a side than the mask layer 30. The negative electrode 40 has a solid-state electrolyte layer 50 provided on the dielectric layer 20, and an electroconductive layer 60 provided on the solid-state electrolyte layer 50. The solid-state electrolyte layer 50 includes a first layer 51 containing a first electroconductive polymer doped with a first dopant, and a second layer 52 containing a second electroconductive polymer doped with a second dopant. The second layer 52 is disposed locally within the plane of the solid electrolyte layer 50, and the first layer 51 is disposed at least in a region where the second layer 52 is not disposed within the plane of the solid electrolyte 50. The second electroconductive polymer is more susceptible to de-doping than the first electroconductive polymer.
Inventors:
TANAKA YASUO (JP)
YOSHIDA KEIJI (JP)
YOSHIDA KEIJI (JP)
Application Number:
PCT/JP2022/040754
Publication Date:
May 25, 2023
Filing Date:
October 31, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01G9/028; H01G9/042; H01G9/055
Domestic Patent References:
| WO2016174818A1 | 2016-11-03 |
Foreign References:
| JP2012182226A | 2012-09-20 | |||
| JP2010278033A | 2010-12-09 | |||
| JP2014041933A | 2014-03-06 | |||
| JP2018129437A | 2018-08-16 |
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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