# US 12,763,265 B2 · Solid electrolytic capacitor and capacitor array for suppressing delamination > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,265 B2 - Document ID: US12763265B2 - Status: Granted - Kind: B2 - Application number: 18/797,629 - Filed: 2024-08-08 - Published: 2024-11-28 - Granted: 2026-10-13 - Earliest claimed: 2022-02-16 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Daiki Habu; Takeshi Furukawa - Web page: https://patentgrep.com/patent/US12763265B2 ## CPC - H01G 9/048: characterised by their structure (H01G11/22 takes precedence) - H01G 9/07: Dielectric layers - H01G 9/15: Solid electrolytic capacitors (H01G11/00 takes precedence) - H01G 9/26: Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices with each other - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) ## Abstract A solid electrolytic capacitor including: an anode plate having a porous layer on at least one main surface thereof; a dielectric layer on the porous layer; a cathode layer on the dielectric layer, the cathode layer including a solid electrolyte layer on the surface of the dielectric layer, and a conductor layer on a surface of the solid electrolyte layer, and the solid electrolyte layer including a first solid electrolyte layer in a region including an inside of pores of the dielectric layer, and a second solid electrolyte layer covering the first solid electrolyte layer; a mask layer made of an insulating material and located in a region surrounding the cathode layer at a peripheral edge of the porous layer; and a columnar layer made of an insulating material and located at a distance from the mask layer in a region surrounded by the cathode layer in the porous layer. ## Claims ### Claim 1 A solid electrolytic capacitor comprising: an anode plate having a porous layer on at least one main surface thereof; a dielectric layer on a surface of the porous layer; a cathode layer on a surface of the dielectric layer, wherein the cathode layer includes a solid electrolyte layer on the surface of the dielectric layer, and a conductor layer on a surface of the solid electrolyte layer, and the solid electrolyte layer includes a first solid electrolyte layer in a region including an inside of pores of the dielectric layer, and a second solid electrolyte layer covering the first solid electrolyte layer; a mask layer made of a first insulating material and located in a region surrounding the cathode layer at a peripheral edge of the porous layer; and a columnar layer made of a second insulating material and located at a distance from the mask layer in a region surrounded by the cathode layer in the porous layer, wherein, when viewed from a cross section along a thickness direction across the cathode layer, the mask layer, and the columnar layer, the first solid electrolyte layer includes an outer side portion in contact with the mask layer and an inner side portion in contact with the columnar layer and not in contact with the outer side portion, on the surface of the dielectric layer on an outermost surface of the anode plate, and at least a part of the second solid electrolyte layer penetrates the inside of the pores of the dielectric layer in a region between the outer side portion and the inner side portion of the first solid electrolyte layer. ### Claim 2 (depends on 1) The solid electrolytic capacitor according to claim 1, further comprising: an insulating portion that contains a resin material and covers the conductor layer. ### Claim 3 (depends on 2) The solid electrolytic capacitor according to claim 2, further comprising: a through-hole conductor that penetrates the columnar layer in a thickness direction. ### Claim 4 (depends on 3) The solid electrolytic capacitor according to claim 3, wherein the through-hole conductor is on at least an inner wall surface of a through-hole that penetrates the columnar layer in the thickness direction, and is electrically connected to the anode plate on the inner wall surface of the through-hole. ### Claim 5 (depends on 2) The solid electrolytic capacitor according to claim 2, further comprising: a via conductor that penetrates the insulating portion in the thickness direction, and is electrically connected to the cathode layer. ### Claim 6 (depends on 1) The solid electrolytic capacitor according to claim 1, further comprising: a through-hole conductor that penetrates the columnar layer in a thickness direction. ### Claim 7 (depends on 6) The solid electrolytic capacitor according to claim 6, wherein the through-hole conductor is on at least an inner wall surface of a through-hole that penetrates the columnar layer in the thickness direction, and is electrically connected to the anode plate on the inner wall surface of the through-hole. ### Claim 8 (depends on 7) The solid electrolytic capacitor according to claim 7, further comprising: a via conductor that penetrates the insulating portion in the thickness direction, and is electrically connected to the cathode layer. ### Claim 9 (depends on 1) The solid electrolytic capacitor according to claim 1, wherein the conductor layer includes a metal layer containing a metal filler. ### Claim 10 (depends on 1) The solid electrolytic capacitor according to claim 1, wherein the conductor layer includes a metal layer and a conductive resin layer. ### Claim 11 (depends on 10) The solid electrolytic capacitor according to claim 10, wherein the conductive resin layer is on the second solid electrolyte layer and the metal layer is on the conductive resin layer. ### Claim 12 (depends on 1) The solid electrolytic capacitor according to claim 1, wherein the first insulating material is the same as the second insulating material. ### Claim 13 (depends on 1) The solid electrolytic capacitor according to claim 1, wherein the columnar layer is in contact with the anode plate. ### Claim 14 (depends on 1) The solid electrolytic capacitor according to claim 1, wherein a difference between a coefficient of linear expansion of the columnar layer and a coefficient of linear expansion of the anode plate is 100 ppm/K or less. ### Claim 15 (depends on 1) The solid electrolytic capacitor according to claim 1, wherein an elastic modulus of the columnar layer is preferably 2 Gpa or less. ### Claim 16 (depends on 1) A capacitor array comprising: a plurality of the solid electrolytic capacitors according to claim 1.