# US 12,183,502 B2 · Inductor component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,502 B2 - Document ID: US12183502B2 - Status: Granted - Kind: B2 - Application number: 18/490,879 - Filed: 2023-10-20 - Published: 2024-02-08 - Granted: 2024-12-31 - Earliest claimed: 2019-07-25 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Rikiya Sano; Kenta Kondo; Yoshiyuki Oota - Web page: https://patentgrep.com/patent/US12183502B2 ## CPC - H01F 27/323: {Insulation between winding turns, between winding layers} - C03B 19/06: by sintering, {e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction} - C03C 8/16: with vehicle or suspending agents, e.g. slip - C03C 8/18: containing free metals - C03C 10/0054: {containing PbO, SnO2, B2O3} - C03C 17/3411: {with at least two coatings of inorganic materials (C03C17/36, C03C17/42 take precedence)} - H01F 17/0013: {with stacked layers} - H01F 27/292: {Surface mounted devices} - C03C 2214/20: Glass-ceramics matrix - H01F 2017/004: {with the coil helically wound around an axis without a core} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS ## Abstract An inductor component includes an element assembly formed of an insulator material and an inner electrode arranged in the element assembly. The insulator material contains a base material formed of an amorphous material containing B, Si, O, and K and a crystalline filler and includes a filler-poor glass portion in a region along the inner electrode. The content of the crystalline filler in the filler-poor glass portion is lower than the content of the crystalline filler in the element assembly excluding the filler-poor glass portion. ## Claims ### Claim 1 An inductor component comprising: an element assembly formed of an insulator material; and an inner electrode arranged in the element assembly, wherein the insulator material contains a base material formed of an amorphous material containing B, Si, O, and K and a crystalline filler and includes a filler-poor glass portion in a region along the inner electrode, a content of the crystalline filler in the filler-poor glass portion is lower than a content of the crystalline filler in the element assembly excluding the filler-poor glass portion, the content of the crystalline filler in the filler-poor glass portion is lower than the content of the crystalline filler in a center portion of the element assembly, and the filler-poor glass portion is in direct contact with the inner electrode around an entire circumference of the inner electrode when viewed as a cross-section along an axial direction of the inner electrode. ### Claim 2 (depends on 1) The inductor component according to claim 1, wherein the inner electrode partly includes the amorphous material containing B, Si, O, and K. ### Claim 3 (depends on 1) The inductor component according to claim 1, wherein the inner electrode completely includes the amorphous material containing B, Si, O, and K. ### Claim 4 (depends on 1) The inductor component according to claim 1, wherein the crystalline filler contains any of Al, Si, Ti, Zr, Ca, Mg, Fe, and Mn. ### Claim 5 (depends on 1) The inductor component according to claim 1, wherein the filler-poor glass portion covers the inner electrode. ### Claim 6 (depends on 1) The inductor component according to claim 1, wherein the inner electrode is a coil having a winding portion that is spirally wound, the filler-poor glass portion has a first filler-poor glass portion in contact with the outer edge of the winding portion of the coil and a second filler-poor glass portion in contact with the inner edge of the winding portion in a plane perpendicular to the winding axis of the coil, and a thickness of the first filler-poor glass portion is less than a thickness of the second filler-poor glass portion. ### Claim 7 (depends on 1) The inductor component according to claim 1, further comprising an outer electrode electrically coupled to the inner electrode, wherein the inner electrode is a coil having a winding portion that is spirally wound and an extended electrode to electrically couple the winding portion to the outer electrode, the filler-poor glass portion has a first portion in contact with at least part of the winding portion and a second portion in contact with at least part of the extended electrode, and a thickness of the second portion is less than a thickness of the first portion. ### Claim 8 (depends on 1) The inductor component according to claim 1, further comprising an outer electrode electrically coupled to the inner electrode, wherein the inner electrode is a coil having a winding portion that is spirally wound and an extended electrode to electrically couple the winding portion to the outer electrode, the filler-poor glass portion has a first portion in contact with at least part of the winding portion and a third portion in contact with at least part of the outer electrode, and a thickness of the third portion is less than a thickness of the first portion. ### Claim 9 (depends on 1) The inductor component according to claim 1, wherein the element assembly is a multilayer body in which a plurality of insulating layers provided with a coil conductor layer are stacked, and of the plurality of insulating layers, a thickness of the filler-poor glass portion in each of the lowermost insulating layer and the uppermost insulating layer in the coil axis direction is less than a thickness of the filler-poor glass portion in each of the insulating layers other than the lowermost insulating layer and the uppermost insulating layer. ### Claim 10 (depends on 1) The inductor component according to claim 1, wherein the inner electrode has a smooth surface. ### Claim 11 (depends on 2) The inductor component according to claim 2, wherein the crystalline filler contains any of Al, Si, Ti, Zr, Ca, Mg, Fe, and Mn. ### Claim 12 (depends on 3) The inductor component according to claim 3, wherein the crystalline filler contains any of Al, Si, Ti, Zr, Ca, Mg, Fe, and Mn. ### Claim 13 (depends on 2) The inductor component according to claim 2, wherein the content of the crystalline filler in the filler-poor glass portion is 10% or less the content of the crystalline filler in a center portion of the element assembly. ### Claim 14 (depends on 2) The inductor component according to claim 2, wherein the filler-poor glass portion covers the inner electrode. ### Claim 15 (depends on 2) The inductor component according to claim 2, wherein the inner electrode is a coil having a winding portion that is spirally wound, the filler-poor glass portion has a first filler-poor glass portion in contact with the outer edge of the winding portion of the coil and a second filler-poor glass portion in contact with the inner edge of the winding portion in a plane perpendicular to the winding axis of the coil, and a thickness of the first filler-poor glass portion is less than a thickness of the second filler-poor glass portion. ### Claim 16 (depends on 2) The inductor component according to claim 2, further comprising an outer electrode electrically coupled to the inner electrode, wherein the inner electrode is a coil having a winding portion that is spirally wound and an extended electrode to electrically couple the winding portion to the outer electrode, the filler-poor glass portion has a first portion in contact with at least part of the winding portion and a second portion in contact with at least part of the extended electrode, and a thickness of the second portion is less than a thickness of the first portion. ### Claim 17 (depends on 2) The inductor component according to claim 2, further comprising an outer electrode electrically coupled to the inner electrode, wherein the inner electrode is a coil having a winding portion that is spirally wound and an extended electrode to electrically couple the winding portion to the outer electrode, the filler-poor glass portion has a first portion in contact with at least part of the winding portion and a third portion in contact with at least part of the outer electrode, and a thickness of the third portion is less than a thickness of the first portion. ### Claim 18 (depends on 2) The inductor component according to claim 2, wherein the element assembly is a multilayer body in which a plurality of insulating layers provided with a coil conductor layer are stacked, and of the plurality of insulating layers, a thickness of the filler-poor glass portion in each of the lowermost insulating layer and the uppermost insulating layer in the coil axis direction is less than a thickness of the filler-poor glass portion in each of the insulating layers other than the lowermost insulating layer and the uppermost insulating layer. ### Claim 19 (depends on 2) The inductor component according to claim 2, wherein the inner electrode has a smooth surface.