# US 10,319,506 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 10,319,506 B2 - Document ID: US10319506B2 - Status: Granted - Kind: B2 - Application number: 15/590,341 - Filed: 2017-05-09 - Published: 2017-11-16 - Granted: 2019-06-11 - Earliest claimed: 2016-05-11 - Assignees: TDK Corporation - Applicants: TDK Corporation - Inventors: Toshio Tomonari; Sachiko Takano; Shigeki Sato - Web page: https://patentgrep.com/patent/US10319506B2 ## CPC - H01F 17/0013: {with stacked layers} - H01F 5/003: {Printed circuit coils} - H01F 10/26: characterised by the substrate or intermediate layers {(H01F10/06 and H01F10/32 take precedence)} - H01F 17/04: with magnetic core - H01F 27/292: {Surface mounted devices} - H01F 27/36: Electric or magnetic shields or screens (movable for varying inductance H01F21/10) - H01F 27/366: {made of ferromagnetic material} - H01F 27/2809: {on stacked layers} - H01F 2003/106: {Magnetic circuits using combinations of different magnetic materials} - H01F 2017/0053: {with means to reduce eddy currents} - H01F 2017/0066: {with a magnetic layer} - H01F 2017/0073: {with a special conductive pattern, e.g. flat spiral} - H01F 2017/008: {Electric or magnetic shielding of printed inductances} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract Disclosed herein is a coil component that includes an element body made of a first magnetic material, a coil conductor embedded in the element body, and first and second magnetic films made of a second magnetic material having higher permeability than that of the first magnetic material. The element body has an upper surface crossing a coil axis of the coil conductor and first and second side surfaces extending substantially parallel to the coil axis. The first magnetic film is formed on the upper surface and first side surface of the element body, and the second magnetic film is formed on the upper surface and second side surface of the element body. ## Claims ### Claim 1 A coil component comprising: an element body made of a first magnetic material; a coil conductor embedded in the element body; and first and second magnetic films made of a second magnetic material having higher permeability than that of the first magnetic material, wherein the element body has an upper surface crossing a coil axis of the coil conductor and first and second side surfaces extending substantially parallel to the coil axis, and wherein the first magnetic film is formed on the upper surface and first side surface of the element body, and the second magnetic film is formed on the upper surface and second side surface of the element body. ### Claim 2 (depends on 1) The coil component as claimed in claim 1, wherein the element body further has a mounting surface opposite to the upper surface, and wherein the first and second magnetic films are further formed on the mounting surface of the element body. ### Claim 3 (depends on 1) The coil component as claimed in claim 1, further comprising a first terminal electrode connected to one end of the coil conductor and a second terminal electrode connected to other end of the coil conductor, wherein the element body further has third and fourth side surfaces extending substantially parallel to the coil axis and crossing at substantially right angles to the first and second side surfaces, and wherein the first terminal electrode is formed on at least the third side surface, and the second terminal electrode is formed on at least the fourth side surface. ### Claim 4 (depends on 1) The coil component as claimed in claim 1, wherein a part of the first magnetic film that is formed on the first side surface is separated by a first slit, and a part of the second magnetic film that is formed on the second side surface is separated by a second slit. ### Claim 5 (depends on 4) The coil component as claimed in claim 4, wherein each of the first and second slits is extended in substantially perpendicular to the coil axis. ### Claim 6 (depends on 5) The coil component as claimed in claim 5, wherein each of the first and second slits is offset to a mounting surface of the element body positioned opposite to the upper surface. ### Claim 7 (depends on 1) The coil component as claimed in claim 1, further comprising a third magnetic film formed on the upper surface of the element body independent of the first and third magnetic films. ### Claim 8 (depends on 1) The coil component as claimed in claim 1, wherein the upper surface of the element body includes first, second and third sections, wherein the first magnetic film is formed on the first section of the upper surface, wherein the second magnetic film is formed on the second section of the upper surface, and wherein the upper surface of the element body is exposed at the third section so that the third section of the upper surface is free from the first and second magnetic films. ### Claim 9 A coil component comprising: an element body having first and second surfaces opposite to each other and third and fourth surfaces opposite to each other, and fifth and sixth surfaces opposite to each other; a coil conductor embedded in the element body; a first magnetic film formed on the first surface and the fifth surface; a second magnetic film formed on the second surface and the fifth surface; a first terminal electrode connected to one end of the coil conductor, the first terminal electrode being formed on the third surface; and a second terminal electrode connected to other end of the coil conductor, the second terminal electrode being formed on the fourth surface. ### Claim 10 (depends on 9) The coil component as claimed in claim 9, further comprising a third magnetic film formed on the fifth surface. ### Claim 11 (depends on 9) The coil component as claimed in claim 9, wherein the first and second magnetic films are further formed on the sixth surface. ### Claim 12 (depends on 9) The coil component as claimed in claim 9, wherein the third and fourth surfaces are free from the first and second magnetic films. ### Claim 13 (depends on 9) The coil component as claimed in claim 9, wherein the first magnetic film is divided into first and second sections by a first slit formed on the first surface, and wherein the second magnetic film is divided into third and fourth sections by a second slit formed on the second surface. ### Claim 14 (depends on 13) The coil component as claimed in claim 13, wherein the first section is greater than the second section, and the third section is greater than the fourth section. ### Claim 15 (depends on 9) The coil component as claimed in claim 9, wherein the coil conductor has a coil axis that is substantially parallel to the first to fourth surfaces. ### Claim 16 (depends on 9) The coil component as claimed in claim 9, wherein the fifth surface of the element body includes first, second and third sections, wherein the first magnetic film is formed on the first section of the fifth surface, wherein the second magnetic film is formed on the second section of the fifth surface, and wherein the fifth surface of the element body is exposed at the third section so that the third section of the upper surface is free from the first and second magnetic films. ### Claim 17 A coil component comprising: an element body having a first surface, the first surface including first to fifth sections; a coil conductor embedded in the element body, the coil conductor having a coil axis that is substantially perpendicular to the first surface; a first magnetic film formed on the first section of the first surface; a second magnetic film formed on the second section of the first surface; a first terminal electrode connected to one end of the coil conductor, the first terminal electrode being formed on the third section of the first surface; and a second terminal electrode connected to other end of the coil conductor, the second terminal electrode being formed on the fourth section of the first surface, wherein the first surface of the element body is exposed at the fifth section so that the fifth section of the first surface is free from the first and second magnetic films and the first and second terminal electrodes so as to separate the first and second magnetic films and the first and second terminal electrodes from one another. ### Claim 18 (depends on 17) The coil component as claimed in claim 17, wherein the first surface further includes a sixth section surrounded by the fifth section, and wherein the coil component further comprises a third magnetic film formed on the sixth section of the first surface. ### Claim 19 (depends on 17) The coil component as claimed in claim 17, wherein the element body further has second and third surfaces opposite to each other, wherein the first magnetic film is further formed on the second surface, and wherein the second magnetic film is further formed on the third surface.