公开(公告)号：US20230178306A1

公开(公告)日：2023-06-08

申请号：US17923767

申请日：2021-04-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya KURIMOTO ,  Hitoshi FUKUI

IPC: H01G9/025 ,  H01G9/042

CPC classification number: H01G9/025 ,  H01G9/0425

Abstract: A solid electrolytic capacitor element includes an anode body, a dielectric layer formed at the surface of the anode body, and a cathode portion that covers at least a part of the dielectric layer. The cathode portion includes a solid electrolyte layer that covers at least a part of the dielectric layer. The solid electrolyte included in the solid electrolyte layer has a weight reduction ratio of 3% or less when measured through thermogravimetric analysis in which the solid electrolyte is heated to 180° C., is kept at 180° C. for 20 minutes, is cooled from 180° C. to 30° C., and is then heated from 30° C. to 260° C. at a rate of 20° C./min.