COIL COMPONENT

• US 20190333687A1
• Filed: 10/16/2018
• Published: 10/31/2019
• Est. Priority Date: 04/25/2018
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: YANG, Ju Hwan, MOON, Byeong Cheol, RYU, Joung Gul
• Granted Patent: US 11,398,343 B2
• Time in Patent Office: Days
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 2017/0073 with a special conductive pattern, e.g. flat spiral
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 27/324 Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
• CPC Class Codes: H01F 41/042 by thin film techniques
• CPC Class Codes: H01F 41/046 structurally combined with ferromagnetic material

Abstract

A coil component is disclosed. The coil component includes a body having one surface and the other surface opposing each other, and a plurality of wall surfaces connecting one surface and the other surface to each other; a coil part embedded in the body and having both ends exposed to both end surfaces of the plurality of wall surfaces of the body, opposing each other; an insulating layer covering one surface of the body; and first and second external electrodes disposed on both end surfaces of the body, respectively, to extend onto the insulating layer, and including a bonded conductive layer disposed on the insulating layer, and an external conductive layer disposed on the bonded conductive layer, respectively.

Claims

1. A coil component comprising:

a body having first and second surfaces opposing each other, and a plurality of wall surfaces connecting the first and second surfaces to each other;

a coil part embedded in the body and having first and second ends respectively exposed to first and second end surfaces of the plurality of wall surfaces of the body, the first and second end surfaces opposing each other;

an insulating layer covering one surface of the body; and

first and second external electrodes disposed on the first and second end surfaces of the body, respectively, extending onto the insulating layer, and including a bonded conductive layer disposed on the insulating layer, and an external conductive layer disposed on the bonded conductive layer, respectively.

2. The coil component of claim 1, wherein the bonded conductive layer includes at least one of titanium (Ti), chromium (Cr), and copper (Cu).

3. The coil component of claim 1, wherein the external conductive layer includes copper (Cu).

4. The coil component of claim 1, wherein at least a portion of the bonded conductive layer permeates into the insulating layer.

5. The coil component of claim 1, wherein the external conductive layer is in contact with one end surface of the body and extends onto the bonded conductive layer.

6. The coil component of claim 5, wherein the external conductive layer covers the bonded conductive layer.

7. The coil component of claim 5, wherein the external conductive layer is integrally formed.

8. The coil component of claim 1, wherein the bonded conductive layer extends to one end surface of the body from the insulating layer.

9. The coil component of claim 8, wherein the external conductive layer covers the bonded conductive layer.

10. The coil component of claim 8, wherein the external conductive layer is integrally formed.

11. The coil component of claim 1, wherein the insulating layer is disposed on the second surface of the body, and both side surfaces connecting both end surfaces of the body to each other of the plurality of wall surfaces of the body.

12. The coil component of claim 1, wherein the bonded conductive layer comprises a plurality of layers.

13. A coil component, comprising:

a body including a coil part;

an external electrode disposed on the body; and

an insulating layer covering a mounting surface of the body,

wherein the external electrode includes a bonded conductive layer disposed on the insulating layer, and an external conductive layer disposed on the bonded conductive layer, and extending to an end surface of the body.

14. The coil component of claim 13, wherein the bonded conductive layer includes at least one of titanium (Ti), chromium (Cr), and copper (Cu).

15. The coil component of claim 13, wherein the external conductive layer includes copper (Cu).

16. The coil component of claim 13, wherein at least a portion of the bonded conductive layer permeates into the insulating layer.