# US 9,520,231 B2 · Laminated ceramic capacitor and method for manufacturing laminated ceramic capacitor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,231 B2 - Document ID: US9520231B2 - Status: Granted - Kind: B2 - Application number: 14/612,505 - Filed: 2015-02-03 - Published: 2015-06-18 - Granted: 2016-12-13 - Earliest claimed: 2012-08-07 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Shoichiro Suzuki; Shinichi Yamaguchi - Web page: https://patentgrep.com/patent/US9520231B2 ## CPC - H01G 4/008: Selection of materials - H01G 4/232: electrically connecting two or more layers of a stacked or rolled capacitor - H01G 4/30: Stacked capacitors (H01G4/33 takes precedence) - 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 laminated ceramic capacitor that includes a ceramic laminated body of a plurality of stacked ceramic dielectric layers, a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween within the ceramic laminated body, and external electrodes provided on the outer surface of the ceramic laminated body and electrically connected to the internal electrodes. The internal electrodes contain Ni as a main constituent, and the Ni constituting the internal electrodes has a lattice constant in the range of 0.3250 nm to 0.3450 nm. ## Claims ### Claim 1 A laminated ceramic capacitor comprising: a ceramic laminated body having a plurality of stacked ceramic dielectric layers; a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween within the ceramic laminated body; and an external electrode provided on an outer surface of the ceramic laminated body and electrically connected to the internal electrodes, wherein the internal electrodes contain Ni as a main constituent, and the Ni constituting the internal electrodes has a lattice constant in the range of 0.3250 nm to 0.3450 nm. ### Claim 2 (depends on 1) The laminated ceramic capacitor according to claim 1, wherein the internal electrodes further contain Sn. ### Claim 3 (depends on 1) The laminated ceramic capacitor according to claim 1, wherein the internal electrodes comprise a first set of internal electrodes extending out from a first end surface of the ceramic laminated body and a second set of internal electrodes extending out from a second end surface of the ceramic laminated body, the external electrode is a first external electrode electrically connected to the first set of internal electrodes and the laminated ceramic capacitor further includes a second external electrode electrically connected to the second set of internal electrodes. ### Claim 4 A method for manufacturing a laminated ceramic capacitor, the method comprising: forming an unfired ceramic laminated body comprising a plurality of stacked unfired ceramic dielectric layers, and a plurality of unfired internal electrode patterns opposed to each other with the unfired ceramic dielectric layers interposed therebetween, the unfired internal electrode patterns comprising a conductive paste film containing Ni as a main constituent; and firing the unfired ceramic laminated body to obtain a ceramic laminated body including a plurality of ceramic dielectric layers, and a plurality of internal electrodes provided to be opposed to each other with the ceramic dielectric layers interposed therebetween, wherein the Ni constituting the internal electrodes has a lattice constant in the range of 0.3250 nm to 0.3450 nm. ### Claim 5 (depends on 4) The method for manufacturing a laminated ceramic capacitor according to claim 4, further comprising forming an external electrode on an outer surface of the ceramic laminated body and electrically connected to the internal electrodes. ### Claim 6 (depends on 4) The method for manufacturing a laminated ceramic capacitor according to claim 4, wherein the internal electrodes further contain Sn. ### Claim 7 (depends on 5) The method for manufacturing a laminated ceramic capacitor according to claim 5, wherein the internal electrodes comprise a first set of internal electrodes extending out from a first end surface of the ceramic laminated body and a second set of internal electrodes extending out from a second end surface of the ceramic laminated body, the external electrode is a first external electrode electrically connected to the first set of internal electrodes and the method further comprises forming a second external electrode electrically connected to the second set of internal electrodes. ### Claim 8 (depends on 4) The method for manufacturing a laminated ceramic capacitor according to claim 4, wherein the unfired ceramic dielectric layers comprise a ceramic raw material containing Sn. ### Claim 9 (depends on 8) The method for manufacturing a laminated ceramic capacitor according to claim 8, wherein the internal electrodes further contain Sn. ### Claim 10 (depends on 4) The method for manufacturing a laminated ceramic capacitor according to claim 4, wherein the firing is conducted at a temperature of 1150° C. for 20 minutes with a rate of temperature increase of 20° C./min. ### Claim 11 (depends on 10) The method for manufacturing a laminated ceramic capacitor according to claim 10, wherein the firing is conducted in a reducing atmosphere. ### Claim 12 (depends on 11) The method for manufacturing a laminated ceramic capacitor according to claim 11, wherein the reducing atmosphere is H2—N2—H2O gas with an oxygen partial pressure of 10−10 to 10−12 Mpa. ### Claim 13 A method for manufacturing a laminated ceramic capacitor comprising: a ceramic laminated body of a plurality of stacked ceramic dielectric layers; a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween; and an external electrode provided on an outer surface of the ceramic laminated body and electrically connected to the internal electrodes, wherein the internal electrodes contain Ni as a main constituent, and contain Sn; and the Ni constituting the internal electrodes has a lattice constant in a range of 0.3250 nm to 0.3450 nm, the method comprising the steps of: forming an unfired ceramic laminated body comprising a plurality of stacked, unfired ceramic dielectric layers, the unfired ceramic dielectric layers comprising a ceramic raw material containing Sn, and a plurality of unfired internal electrode patterns opposed to each other with the unfired ceramic dielectric layers interposed therebetween, the unfired internal electrode patterns comprising a conductive paste film containing Ni as a main constituent; and firing the unfired ceramic laminated body to obtain a ceramic laminated body including a plurality of ceramic dielectric layers, and a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween. ### Claim 14 A method for manufacturing a laminated ceramic capacitor comprising: a ceramic laminated body of a plurality of stacked ceramic dielectric layers; a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween; and an external electrode provided on an outer surface of the ceramic laminated body and electrically connected to the internal electrodes, wherein the internal electrodes contain Ni as a main constituent, and contain Sn; and the Ni constituting the internal electrodes has a lattice constant in the range of 0.3250 nm to 0.3450 nm, the method comprising the steps of: forming an unfired ceramic laminated body comprising a plurality of stacked, unfired ceramic dielectric layers, and a plurality of unfired internal electrode patterns opposed to each other with the unfired ceramic dielectric layers interposed therebetween, the unfired internal electrode patterns comprising a conductive paste film containing Ni as a main constituent and containing Sn; and firing the unfired ceramic laminated body to obtain a ceramic laminated body including a plurality of ceramic dielectric layers, and a plurality of internal electrodes opposed to each other with the ceramic dielectric layers interposed therebetween.