Electronic component having lead part including regions having different thicknesses and method of manufacturing the same

• US 10,332,667 B2
• Filed: 11/09/2015
• Issued: 06/25/2019
• Est. Priority Date: 12/12/2014
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Jeong, Dong Jin, Lee, Kyung Seop, Choi, Yong Un, Son, Kyung Min
• Primary Examiner(s): Lian, Mang Tin Bik
• Assistant Examiner(s): Barnes, Malcolm
• Application Number:
  US14/936,433
• Publication Number:
  US 20160172103A1
• Time in Patent Office: 1,324 Days
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 41/046 structurally combined with ferromagnetic material

Abstract

An electronic component includes a magnetic body; and a coil pattern embedded in the magnetic body, the coil pattern including an internal coil part having a spiral shape and a lead part connected to an end of the internal coil part and exposed to an external surface of the magnetic body. The lead part includes at least two regions having different thicknesses, and the thickness of at least a portion of the lead part having a relatively thin thickness is thinner than a thickness of the internal coil part.

Claims

1. An electronic component comprising:

a magnetic body; and

a coil pattern embedded in the magnetic body and disposed on and below an insulating substrate, each of the coil patterns including an internal coil part having a spiral shape and a lead part connected to each of ends of the internal coil part and exposed to a respective external surface of the magnetic body,

wherein each lead part includes at least two regions having different thicknesses, and the thickness of a portion of each lead part having a relatively thin thickness is thinner than a thickness of the internal coil part, and

wherein a portion of each lead part having a relatively thick thickness contacts a corresponding end of the internal coil part and the portion of each lead part having the relatively thin thickness contacts the insulating substrate and is exposed to the respective external surface of the magnetic body,

wherein an entirety of each lead part does not overlap the internal coil part when viewed in a thickness direction of the magnetic body.

2. The electronic component of claim 1, wherein the portion of each lead part having the relatively thick thickness has the same thickness as the thickness of the internal coil part.

3. The electronic component of claim 1, wherein each lead part has a step shape.

4. The electronic component of claim 1, wherein the portion of each lead part having the relatively thin thickness is disposed relatively close to an outer region of the magnetic body.

5. The electronic component of claim 1, wherein 0.6≤

b/a<

1, where a is the thickness of the internal coil part and b is the thickness of the portion of each lead part having the relatively thin thickness.

6. The electronic component of claim 1, wherein 0.6<

d/c<

1, where c is a width of each lead part and d is a width of the portion of each lead part having the relatively thin thickness is d.

7. The electronic component of claim 1, wherein a thickness of a cover region covering an upper portion of the coil pattern in the magnetic body is at most 150 μ

m.

8. The electronic component of claim 1, wherein the coil pattern is formed by a plating process.

9. The electronic component of claim 1, wherein the coil pattern comprises a first coil pattern disposed on a first surface of the insulating substrate and a second coil pattern disposed on a second surface of the insulating substrate opposing the first surface of the insulating substrate.

10. The electronic component of claim 1, further comprising external electrodes disposed on outer surfaces of the magnetic body and connected to a corresponding lead part.

11. The electronic component of claim 1, wherein the magnetic body comprises a magnetic metal powder and a thermosetting resin.

12. The electronic component of claim 5, wherein b/a is greater than 0.8 (b/a>

0.8).