# US 2021/0280356 A1 · Coil component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0280356 A1 - Document ID: US20210280356A1 - Status: Published application - Kind: A1 - Application number: 17/189,824 - Filed: 2021-03-02 - Published: 2021-09-09 - Earliest claimed: 2020-03-03 - Assignees: TDK Corporation - Applicants: TDK Corporation - Inventors: Yugo ASAI; Aoi TOKIWA; Daisuke URABE - Web page: https://patentgrep.com/patent/US20210280356A1 ## CPC - H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core} - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H01F 27/26: Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F27/30) - H01F 27/2828: {Construction of conductive connections, of leads} - H01F 27/292: {Surface mounted devices} - H01F 27/306: {Fastening or mounting coils or windings on core, casing or other support} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract Disclosed herein is a coil component that includes: a drum-shaped core including first and second flange parts and a winding core part; first terminal electrodes provided on the first flange part; second terminal electrodes provided on the second flange part; a plurality of wires wound around the winding core part, each of the plurality of wires having a first end connected to an associated one of the first terminal electrodes, and having a second end connected to an associated one of the second terminal electrodes; and a plate-like core fixed to the first and second flange parts. Each of the first and second flange parts has a first groove formed in a surface facing the plate-like core. The plurality of wires are positioned in parallel to each other in each of the first grooves formed in the first and second flange parts. ## Claims ### Claim 1 A coil component comprising: a drum-shaped core including a first flange part, a second flange part, and a winding core part positioned between the first and second flange parts; a plurality of first terminal electrodes provided on the first flange part; a plurality of second terminal electrodes provided on the second flange part; a plurality of wires wound around the winding core part, each of the plurality of wires having a first end connected to an associated one of the first terminal electrodes, and having a second end connected to an associated one of the second terminal electrodes; and a plate-like core fixed to the first and second flange parts, wherein each of the first and second flange parts has a first groove formed in a surface facing the plate-like core, and wherein the plurality of wires are positioned in parallel to each other in each of the first grooves formed in the first and second flange parts. ### Claim 2 (depends on 1) The coil component as claimed in claim 1, wherein the plate-like core has a second groove at a position overlapping the first grooves formed in the first and second flange parts. ### Claim 3 (depends on 1) The coil component as claimed in claim 1, wherein a space factor of the plurality of wires in the first groove formed in each of the first and second flange parts is 60% or more. ### Claim 4 (depends on 1) The coil component as claimed in claim 1, wherein the plurality of wires include first and second wires, wherein each of the first grooves formed in the first and second flange parts includes a first groove for accommodating the first wire and a second groove for accommodating the second wire, and wherein the first and second grooves extend in parallel to each other so as to position the first and second wires in parallel to each other. ### Claim 5 (depends on 1) The coil component as claimed in claim 1, wherein side surfaces of each of the first grooves formed in the first and second flange parts are inclined. ### Claim 6 A coil component comprising: a first core including a flange part having first and second surfaces and a winding core part extending in a first direction, the first surface of the flange part having a first groove between first and second sections thereof, the second surface of the flange part being perpendicular to the first direction; a second core fixed to the first surface of the flange part so as to form a through hole by the first groove; first and second terminal electrodes formed on the second surface of the flange part and arranged in a second direction perpendicular to the first direction; a first wire wound around the winding core part and connected to the first terminal electrode via the through hole; and a second wire wound around the winding core part and connected to the second terminal electrode via the through hole, wherein the first and second wire contact each other inside the through hole. ### Claim 7 (depends on 6) The coil component as claimed in claim 6, wherein the second core has a second groove overlapping the first groove, and wherein the through hole is formed by the first and second grooves. ### Claim 8 (depends on 7) The coil component as claimed in claim 7, wherein a depth of the first groove is smaller than a diameter of each of the first and second wires. ### Claim 9 (depends on 6) The coil component as claimed in claim 6, wherein the first groove has a bottom surface extending in the first and second directions and a first side surface located between the first section of the first surface and the bottom surface, and wherein the first side surface is inclined with respect to the bottom surface such that an angle between the bottom surface and the first side surface is an obtuse angle. ### Claim 10 (depends on 9) The coil component as claimed in claim 9, wherein at least one of the first and second wires contacts the first side surface. ### Claim 11 (depends on 10) The coil component as claimed in claim 10, wherein the first groove further has a second side surface located between the second section of the first surface and the bottom surface, wherein the second side surface is inclined with respect to the bottom surface such that an angle between the bottom surface and the second side surface is an obtuse angle, the first wires contacts the first side surface, and the second wires contacts the second side surface. ### Claim 12 A coil component comprising: a first core including a flange part having first and second surfaces and a winding core part extending in a first direction, the first surface of the flange part having first and second grooves extending in parallel with each other in the first direction, the second surface of the flange part being perpendicular to the first direction; a second core fixed to the first surface of the flange part so as to form a first through hole by the first groove and a second through hole by the second groove; first and second terminal electrodes formed on the second surface of the flange part and arranged in a second direction perpendicular to the first direction; a first wire wound around the winding core part and connected to the first terminal electrode via the first through hole; and a second wire wound around the winding core part and connected to the second terminal electrode via the second through hole. ### Claim 13 (depends on 12) The coil component as claimed in claim 12, wherein the second core has a third groove overlapping the first groove and a fourth groove overlapping the second groove, wherein the first through hole is formed by the first and third grooves, and wherein the second through hole is formed by the second and fourth grooves. ### Claim 14 (depends on 13) The coil component as claimed in claim 13, wherein the third and fourth grooves extend in parallel with each other in the first direction. ### Claim 15 (depends on 14) The coil component as claimed in claim 14, wherein each of the third and fourth grooves is greater in length in the first direction than each of the first and second grooves.