# US 10,504,644 B2 · Coil component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,504,644 B2 - Document ID: US10504644B2 - Status: Granted - Kind: B2 - Application number: 15/676,446 - Filed: 2017-08-14 - Published: 2018-05-03 - Granted: 2019-12-10 - Earliest claimed: 2016-10-28 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Applicants: Samsung Electro-Mechanics Co., Ltd. - Inventors: Yong Sam Lee; Eo Jin Choi; Jae Hun Kim; Ji Hyun Eom; Hye Yeon Cha - Web page: https://patentgrep.com/patent/US10504644B2 ## CPC - H01F 27/02: Casings - H01F 17/0013: {with stacked layers} - H01F 27/24: Magnetic cores - H01F 27/29: Terminals; Tapping arrangements {for signal inductances} - H01F 27/292: {Surface mounted devices} - H01F 27/32: Insulating of coils, windings, or parts thereof - H01F 27/323: {Insulation between winding turns, between winding layers} - 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 A coil component includes a body, including a coil and a support member supporting the coil, and an external electrode disposed on an external surface of the body. The coil component includes a machined surface formed on a boundary surface between a portion of the support member, removed in the vicinity of a junction portion between the external electrode and the coil, and the remainder of the support member. A cavity, from which the portion of the support member has been removed, is filled with a magnetic material, or an insulating layer is disposed in the cavity. ## Claims ### Claim 1 A coil component comprising: a body including a coil and a magnetic material, the coil including at least one lead portion; and an external electrode disposed on at least a portion of an external surface of the body and having an internal surface contacting and electrically connected to the coil, wherein a support member is disposed in the body to support the coil on a main surface thereof that is larger than a second surface thereof parallel to the main surface, and at least a portion of an edge of the support member facing toward the internal surface of the external electrode has a thickness, measured orthogonally to the main surface of the support member, that is gradually reduced in a direction towards the internal surface of the external electrode. ### Claim 2 (depends on 1) The coil component of claim 1, wherein the portion of the edge having the thickness that is gradually reduced has an insulating layer disposed thereon. ### Claim 3 (depends on 1) The coil component of claim 1, wherein at least a portion of the edge having the thickness that is gradually reduced includes a curve in a cross-section of the support member orthogonal to the main surface. ### Claim 4 (depends on 1) The coil component of claim 1, wherein a minimum thickness (T1.min) of the support member disposed below at least a region of a lower surface of the at least one lead portion is less than a minimum thickness (T2.min) of the support member disposed below at least a region of a lower surface of an innermost coil pattern of the coil. ### Claim 5 (depends on 1) The coil component of claim 1, wherein the edge having the thickness that is gradually reduced has a shape including an inwardly concave slit. ### Claim 6 (depends on 1) The coil component of claim 1, wherein the edge having the thickness that is gradually reduced has a wave shape having a thickness reduced toward an outer portion thereof. ### Claim 7 (depends on 1) The coil component of claim 1, wherein the coil includes an upper coil and a lower coil respectively disposed on the main surface and the second surface of the support member, and the upper coil and the lower coil are connected to each other through a via. ### Claim 8 (depends on 1) The coil component of claim 1, wherein the support member includes a through hole, and the through hole is filled with a magnetic material. ### Claim 9 (depends on 1) The coil component of claim 1, wherein the support member extends to the external surface of the body to contact the external electrode. ### Claim 10 (depends on 1) The coil component of claim 1, wherein the support member is spaced apart from and does not contact the external electrode. ### Claim 11 A coil component comprising: a support member having a main surface with a coil disposed thereon, the main surface being wider than other surfaces of the support member; a body formed of a magnetic material, wherein the support member and coil are disposed within the body; and an external electrode disposed on an external surface of the body and contacting a lead portion of the coil, wherein a thickness of the support member, measured orthogonally to the surface of the support member having the coil disposed thereon, is gradually reduced in a direction towards a position closer to the external electrode from a position further from the external electrode. ### Claim 12 (depends on 11) The coil component of claim 11, wherein the support member extends to the external surface of the body to contact the external electrode. ### Claim 13 A coil component comprising: a support member having a main surface with a coil disposed thereon; a body formed of a magnetic material, wherein the support member and coil are disposed within the body; and an external electrode disposed on an external surface of the body and contacting a lead portion of the coil, wherein a thickness of the support member, measured orthogonally to the main surface of the support member having the coil disposed thereon, is smaller at a position closer to the external electrode than at a position further from the external electrode, the coil includes a coil body having a plurality of coil windings and the lead portion extending from the coil body to the external electrode, the thickness of the support member in an area having the lead portion disposed thereon is smaller than the thickness of the support member in another area having the coil body disposed thereon, and an angle between the main surface of the support member and a side surface of the support member in the area having the lead portion disposed thereon is acute. ### Claim 14 A coil component comprising: a body including a coil and a magnetic material, the coil disposed on a main surface of a support member and including at least one lead portion disposed on the main surface of the support member; and an external electrode disposed on at least a portion of an external surface of the body and having an internal surface contacting and electrically connected to the at least one lead portion of the coil, wherein a first portion of the support member having a first portion of the coil disposed thereon has a first thickness measured orthogonally to the main surface, and a second portion of the support member having a second portion of the coil disposed thereon has a second thickness different from the first thickness, and wherein the at least one lead portion extends to an edge of the main surface of the support member, and the main surface of the support member forms an acute angle with a side surface of the support member along the edge of the main surface of the support member having the at least one lead portion thereon. ### Claim 15 (depends on 14) The coil component of claim 14, wherein the second portion of the support member is disposed between the first portion of the support member and the external surface of the body having the external electrode disposed thereon, and the second thickness is less than the first thickness. ### Claim 16 (depends on 14) The coil component of claim 14, wherein the second portion of the support member has the at least one lead portion of the coil disposed thereon, and the second thickness is less than the first thickness. ### Claim 17 (depends on 14) The coil component of claim 14, wherein the support member extends to the external surface of the body having the external electrode disposed thereon. ### Claim 18 (depends on 17) The coil component of claim 17, wherein the support member contacts the external electrode disposed on the external surface of the body. ### Claim 19 (depends on 14) The coil component of claim 14, wherein the second portion of the support member extends to the external surface of the body having the external electrode disposed thereon, and the second thickness is less than the first thickness.