# US 2023/0058751 A1 · Inductor component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0058751 A1 - Document ID: US20230058751A1 - Status: Published application - Kind: A1 - Application number: 17/818,569 - Filed: 2022-08-09 - Published: 2023-02-23 - Earliest claimed: 2021-08-19 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Katsufumi SASAKI; Yoshimasa YOSHIOKA - Web page: https://patentgrep.com/patent/US20230058751A1 ## CPC - H01F 17/04: with magnetic core - H01F 27/22: Cooling by heat conduction through solid or powdered fillings - H01F 17/0013: {with stacked layers} - H01F 27/025: {Constructional details relating to cooling} - H01F 2017/048: {with encapsulating core, e.g. made of resin and magnetic powder} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract An inductor component includes an element body; and a coil in the element body. The element body includes a metal magnetic powder-containing resin having a resin and metal magnetic powder in the resin. The element body has a rectangular parallelepiped shape having first and second principal surfaces facing each other, and first, second, third and fourth side surfaces connected to the first and second principal surfaces. Each of the first and second principal surfaces has an area larger than an area of each of the first to fourth side surfaces. Each of the first side surface and the first principal surface has one or more recesses, and a deepest recess among the one or more recesses on the first side surface has a maximum depth that is larger than a maximum depth of a deepest recess among the one or more recesses on the first principal surface. ## Claims ### Claim 1 An inductor component comprising: an element body; and a coil in the element body, the element body including a metal magnetic powder-containing resin having a resin and metal magnetic powder contained in the resin, the element body having a rectangular parallelepiped shape that has a first principal surface and a second principal surface facing each other, and a first side surface, a second side surface, a third side surface, and a fourth side surface connected to the first principal surface and the second principal surface, each of the first principal surface and the second principal surface having an area larger than an area of each of the first to fourth side surfaces, each of the first side surface and the first principal surface having at least one recess, and a maximum depth of a deepest recess among the at least one recess on the first side surface being larger than a maximum depth of a deepest recess among the at least one recess on the first principal surface. ### Claim 2 (depends on 1) The inductor component according to claim 1, wherein the first side surface faces the third side surface, the second side surface faces the fourth side surface, and a distance between the first principal surface and the second principal surface is shorter than a distance between the first side surface and the third side surface and a distance between the second side surface and the fourth side surface. ### Claim 3 (depends on 1) The inductor component according to claim 1, wherein the second principal surface having at least one recess, and the maximum depth of the deepest recess among the at least one recess on the first side surface is larger than a maximum depth of a deepest recess among the at least one recess on the second principal surface. ### Claim 4 (depends on 1) The inductor component according to claim 1, wherein each of the second to fourth side surfaces has at least one recess, and a maximum depth of a deepest recess among the at least one recess on each of the second to fourth side surfaces is larger than the maximum depth of the deepest recess among the at least one recess on the first principal surface. ### Claim 5 (depends on 1) The inductor component according to claim 1, wherein the distance between the first principal surface and the second principal surface is 300 μm or less. ### Claim 6 (depends on 1) The inductor component according to claim 1, wherein the metal magnetic powder-containing resin is exposed on the first side surface, and all of the at least one recess on the first side surface are on an exposed surface of the metal magnetic powder-containing resin. ### Claim 7 (depends on 1) The inductor component according to claim 1, wherein an inner surface of the at least one recess on the first side surface has a hemispherical shape. ### Claim 8 (depends on 1) The inductor component according to claim 1, wherein the resin in the metal magnetic powder-containing resin defines the inner surface of the at least one recess on the first side surface. ### Claim 9 (depends on 1) The inductor component according to claim 1, wherein the metal magnetic powder contains iron, and a cut particle of the metal magnetic powder is exposed on at least one of the first to fourth side surfaces. ### Claim 10 (depends on 9) The inductor component according to claim 9, wherein when a maximum diameter of an exposed surface of the cut particle of the metal magnetic powder is D (μm) and the distance between the first principal surface and the second principal surface is T (μm), D≥0.3 T is satisfied. ### Claim 11 (depends on 10) The inductor component according to claim 10, wherein D≥10 μm is further satisfied. ### Claim 12 (depends on 9) The inductor component according to claim 9, wherein an oxide film is on the exposed surface of the cut particle of the metal magnetic powder. ### Claim 13 (depends on 2) The inductor component according to claim 2, wherein the second principal surface having at least one recess, and the maximum depth of the deepest recess among the at least one recess on the first side surface is larger than a maximum depth of a deepest recess among the at least one recess on the second principal surface. ### Claim 14 (depends on 2) The inductor component according to claim 2, wherein each of the second to fourth side surfaces has at least one recess, and a maximum depth of a deepest recess among the at least one recess on each of the second to fourth side surfaces is larger than the maximum depth of the deepest recess among the at least one recess on the first principal surface. ### Claim 15 (depends on 2) The inductor component according to claim 2, wherein the distance between the first principal surface and the second principal surface is 300 μm or less. ### Claim 16 (depends on 2) The inductor component according to claim 2, wherein the metal magnetic powder-containing resin is exposed on the first side surface, and all of the at least one recess on the first side surface are on an exposed surface of the metal magnetic powder-containing resin. ### Claim 17 (depends on 2) The inductor component according to claim 2, wherein an inner surface of the at least one recess on the first side surface has a hemispherical shape. ### Claim 18 (depends on 2) The inductor component according to claim 2, wherein the resin in the metal magnetic powder-containing resin defines the inner surface of the at least one recess on the first side surface. ### Claim 19 (depends on 2) The inductor component according to claim 2, wherein the metal magnetic powder contains iron, and a cut particle of the metal magnetic powder is exposed on at least one of the first to fourth side surfaces. ### Claim 20 (depends on 10) The inductor component according to claim 10, wherein an oxide film is on the exposed surface of the cut particle of the metal magnetic powder.