# US 10,483,038 B2 · Multilayer ceramic capacitor and manufacturing method of multilayer ceramic capacitor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,038 B2 - Document ID: US10483038B2 - Status: Granted - Kind: B2 - Application number: 15/908,498 - Filed: 2018-02-28 - Published: 2018-11-22 - Granted: 2019-11-19 - Earliest claimed: 2017-05-16 - Assignees: Taiyo Yuden Co., Ltd. - Applicants: Taiyo Yuden Co., Ltd. - Inventors: Shohei Kitamura - Web page: https://patentgrep.com/patent/US10483038B2 ## CPC - H01G 4/0085: {Fried electrodes} - H01G 4/012: Form of non-self-supporting electrodes - H01G 4/1227: {based on alkaline earth titanates} - 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 4/248: the terminals embracing or surrounding the capacitive element, e.g. caps (H01G4/252 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 multilayer ceramic capacitor includes: a multilayer structure in which each of dielectric layers and each of internal electrode layers are alternately stacked, a main component of the dielectric layers being ceramic, a main component of the internal electrode layers being a metal, wherein: at least one of the internal electrode layers includes grains of which a main component is ceramic; and an area ratio of a total area of the grains in a cross section of the at least one of the internal electrode layers in a stacking direction of the dielectric layers and the internal electrode layers is 10% or more. ## Claims ### Claim 1 A multilayer ceramic capacitor comprising: a multilayer structure in which each of dielectric layers and each of internal electrode layers are alternately stacked, a main component of the dielectric layers being ceramic, a main component of the internal electrode layers being a metal, wherein: at least one of the internal electrode layers includes grains of which a main component is ceramic; and an area ratio of a total area of the grains to a total area of the at least one of the internal electrode layers in a cross section of the at least one of the internal electrode layers in a stacking direction of the dielectric layers and the internal electrode layers is 12% or more. ### Claim 2 (depends on 1) The multilayer ceramic capacitor as claimed in claim 1, wherein the main component of the internal electrode layers is nickel. ### Claim 3 (depends on 1) The multilayer ceramic capacitor as claimed in claim 1, wherein the main component of the grains is barium titanate. ### Claim 4 (depends on 1) The multilayer ceramic capacitor as claimed in claim 1, wherein the main component of the dielectric layers is barium titanate. ### Claim 5 (depends on 1) The multilayer ceramic capacitor as claimed in claim 1, wherein the area ratio is calculated from a total area of 10 internal electrode layers that are arbitrarily selected from a SEM image of a cross section of the internal electrode layers and a total area of the grains in the 10 internal electrode layers. ### Claim 6 (depends on 1) The multilayer ceramic capacitor as claimed in claim 1, wherein the grains are enclosed by the internal electrode layer. ### Claim 7 A manufacturing method of a multilayer ceramic capacitor comprising: a first step of forming a pattern of a metal conductive paste on a green sheet including ceramic powders, a main component of the metal conductive paste being metal powders of which an average grain diameter is 100 nm or less and of which a standard deviation of grain size distribution is 15 or less, the metal conductive paste including ceramic powders as a co-material, an average grain diameter of the co-material being 10 nm or less, a standard deviation of grain size distribution of the co-material being 5 or less; and a second step of forming internal electrode layers by sintering the metal powders and forming dielectric layers by sintering the ceramic powders of the green sheet, by baking a ceramic multilayer structure obtained by stacking a plurality of layer units obtained by the first step, wherein: at least one of the internal electrode layers includes grains of which a main component is ceramic; and an area ratio of a total area of the grains to a total area of the at least one of the internal electrode layers in a cross section of the at least one of the internal electrode layers in a stacking direction of the dielectric layers and the internal electrode layers is 12% or more. ### Claim 8 (depends on 7) The method as claimed in claim 7, wherein an average speed of temperature increasing from a room temperature to a maximum temperature is 30 degrees C/minute to 80 degrees C/minute in the second step. ### Claim 9 (depends on 7) The method as claimed in claim 7, wherein a main component of the metal powders is nickel. ### Claim 10 (depends on 7) The method as claimed in claim 7, wherein a main component of the co-material is barium titanate. ### Claim 11 (depends on 7) The method as claimed in claim 7, wherein a main component of the ceramic powders of the green sheet is barium titanate. ### Claim 12 (depends on 7) The method as claimed in claim 7, wherein the area ratio is calculated from a total area of 10 internal electrode layers that are arbitrarily selected from a SEM image of a cross section of the internal electrode layers and a total area of the grains in the 10 internal electrode layers.