# US 12,603,232 B2 · Capacitor including a capacitance forming part having a metal porous body, a dielectric film, and a conductive film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,232 B2 - Document ID: US12603232B2 - Status: Granted - Kind: B2 - Application number: 18/733,992 - Filed: 2024-06-05 - Published: 2024-10-03 - Granted: 2026-04-14 - Earliest claimed: 2022-01-31 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Haruki Kobayashi; Akio Masunari - Web page: https://patentgrep.com/patent/US12603232B2 ## CPC - H01G 4/33: Thin- or thick-film capacitors {(thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)} - H01G 2/06: specially adapted for mounting on a printed-circuit support - H01G 4/012: Form of non-self-supporting electrodes - H01G 4/224: Housing; Encapsulation - H01G 4/228: Terminals - H01G 4/30: Stacked capacitors (H01G4/33 takes precedence) - H01G 2/065: {for surface mounting, e.g. chip capacitors} - 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 capacitor that includes: an insulating substrate having a first main surface and a second main surface; a capacitance forming part facing the first main surface, the capacitance forming part having a conductive metal porous body, a dielectric film covering a surface of the metal porous body, and a conductive film covering the dielectric film; a first external connection line that includes a first via conductor penetrating the insulating substrate and connected to the conductive metal porous body; and a second external connection line that includes a second via conductor penetrating the insulating substrate, and an internal conductor covering the conductive film so as to fill a space inside the capacitance forming part, and the conductive film and the second via conductor are connected with at least the internal conductor interposed therebetween. ## Claims ### Claim 1 A capacitor comprising: an insulating substrate having a first main surface and a second main surface opposite to the first main surface; a capacitance forming part facing the first main surface, the capacitance forming part comprising a conductive metal porous body, a dielectric film covering a surface of the metal porous body, and a conductive film covering the dielectric film; a first external connection line that comprises a first via conductor penetrating the insulating substrate from the first main surface so as to reach the second main surface and connected to the conductive metal porous body; and a second external connection line comprises a second via conductor penetrating the insulating substrate from the first main surface so as to reach the second main surface, and an internal conductor covering the conductive film so as to fill a space inside the capacitance forming part, and the conductive film and the second via conductor are connected with at least the internal conductor interposed therebetween. ### Claim 2 (depends on 1) The capacitor according to claim 1, wherein the second external connection line further comprises a columnar conductor protruding from the first main surface toward the capacitance forming part and surrounded by the capacitance forming part, and the internal conductor and the second via conductor are connected with at least the columnar conductor interposed therebetween. ### Claim 3 (depends on 2) The capacitor according to claim 2, wherein the columnar conductor extends in a normal direction of the first main surface, and as viewed in the normal direction of the first main surface, the columnar conductor is overlapped with at least a part of the second via conductor. ### Claim 4 (depends on 3) The capacitor according to claim 3, further comprising: a support part that supports the capacitance forming part, the support part protruding from the first main surface toward the capacitance forming part and surrounded by the capacitance forming part, the support part is a support conductor that forms part of the first external connection line, the support conductor is connected to the metal porous body, the support conductor extends in the normal direction of the first main surface, as viewed in the normal direction of the first main surface, the support conductor is overlapped with at least a part of the first via conductor; and a sealing part on the first main surface, sealing the capacitance forming part, and defining an outer surface on a side opposite to a side with the insulating substrate as viewed from the capacitance forming part, the support conductor is exposed at the outer surface, and the columnar conductor is exposed at the outer surface. ### Claim 5 (depends on 3) The capacitor according to claim 3, further comprising: a support part that supports the capacitance forming part, the support part protruding from the first main surface toward the capacitance forming part and surrounded by the capacitance forming part, the support part is a support conductor that forms part of the first external connection line, the support conductor extends in the normal direction of the first main surface, and is connected to the metal porous body, as viewed in the normal direction of the first main surface, the support conductor is overlapped with at least a part of the first via conductor, the capacitance forming part further comprises a first capacitance forming part and a second capacitance forming part stacked apart from each other in the normal direction of the first main surface, the metal porous body of the first capacitance forming part and the metal porous body of the second capacitance forming part are connected by the support conductor, and the conductive film of the first capacitance forming part and the conductive film of the second capacitance forming part are connected by the internal conductor and the columnar conductor. ### Claim 6 (depends on 5) The capacitor according to claim 5, further comprising: a sealing part on the first main surface, sealing the capacitance forming part, and defining an outer surface on a side opposite to a side with the insulating substrate as viewed from the capacitance forming part, wherein the support conductor is exposed at the outer surface, and the columnar conductor is exposed at the outer surface. ### Claim 7 (depends on 2) The capacitor according to claim 2, wherein the capacitance forming part comprises a first capacitance forming part and a second capacitance forming part stacked apart from each other in the normal direction of the first main surface, and the conductive film of the first capacitance forming part and the conductive film of the second capacitance forming part are connected by the internal conductor and the columnar conductor. ### Claim 8 (depends on 7) The capacitor according to claim 7, wherein the internal conductor at a site located between the first capacitance forming part and the second capacitance forming part is larger in thickness than the conductive film. ### Claim 9 (depends on 8) The capacitor according to claim 8, wherein the internal conductor at the site located between the first capacitance forming part and the second capacitance forming part is three times or more as large in thickness as the conductive film. ### Claim 10 (depends on 1) The capacitor according to claim 1, further comprising a support part in the insulating substrate, the support part supporting the capacitance forming part and protruding from the first main surface toward the capacitance forming part, and surrounded by and joined to the capacitance forming part. ### Claim 11 (depends on 10) The capacitor according to claim 10, wherein the support part is a support conductor that forms part of the first external connection line, and the support conductor is connected to the metal porous body. ### Claim 12 (depends on 11) The capacitor according to claim 11, wherein the support conductor extends in the normal direction of the first main surface, and as viewed in the normal direction of the first main surface, the support conductor is overlapped with at least a part of the first via conductor. ### Claim 13 (depends on 11) The capacitor according to claim 11, wherein the support conductor extends in the normal direction of the first main surface, and as viewed in the normal direction of the first main surface, the support conductor is not overlapped with the first via conductor. ### Claim 14 (depends on 11) The capacitor according to claim 11, wherein the support conductor comprises a same material as at least a part of a material included in the metal porous body. ### Claim 15 (depends on 1) The capacitor according to claim 1, wherein the first via conductor and the second via conductor are both in a region where the capacitance forming part is disposed as viewed in a normal direction of the first main surface. ### Claim 16 (depends on 15) The capacitor according to claim 15, wherein the capacitor includes: pluralities of the first via conductor, and pluralities of the second via conductor. ### Claim 17 (depends on 16) The capacitor according to claim 16, wherein the pluralities of the first via conductor and the pluralities of the second via conductor are arranged in an array as viewed in the normal direction of the first main surface, and at least one set of adjacent via conductors among the pluralities of the first via conductor and the pluralities of the second via conductor that are a shortest distance from each other differ in polarity from each other. ### Claim 18 (depends on 1) The capacitor according to claim 1, wherein the internal conductor contains at least any one of Ag and a conductive polymer as a main material.