Coil electronic component

Patent metadata

Field	Value
Publication number	US-11469038-B2
Application number	US-201816137271-A
Country	US
Kind code	B2
Filing date	Sep 20, 2018
Priority date	Dec 22, 2017
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A coil electronic component includes a magnetic body in which internal coil parts are embedded, and a metal shielding sheet disposed on at least one of an upper portion and a lower portion of the magnetic body in a thickness direction, in which permeability of the metal shielding sheet is 100 times or higher than permeability of magnetic metal powder contained in the magnetic body.

First claim

What is claimed is:

1. A coil electronic component, comprising:
a magnetic body in which internal coil parts are embedded; and
a metal shielding sheet disposed on at least one of an upper portion or a lower portion of the magnetic body in a thickness direction,
wherein permeability of the metal shielding sheet is 100 times or higher than permeability of the magnetic body containing magnetic metal powder,
wherein the metal shielding sheet extends from the at least one of an upper portion or a lower portion of the magnetic body to cover at least one side surface of the magnetic body in a width direction,
wherein the metal shielding sheet extends in the width direction from one edge of the at least one of an upper portion or a lower portion to another edge of the at least one of an upper portion or a lower portion, and
wherein an insulating adhesive layer is disposed between the magnetic body and the metal shielding sheet.

2. The coil electronic component of claim 1 , wherein the permeability of the metal shielding sheet is 7500 times or higher than permeability of the magnetic body containing the magnetic metal powder.

3. The coil electronic component of claim 1 , wherein the metal shielding sheet is in unpulverized metallic ribbon form.

4. The coil electronic component of claim 1 , wherein the insulating adhesive layer has a thickness of 3 to 100 μm.

5. The coil electronic component of claim 1 , wherein the metal shielding sheet and the insulating adhesive layer are alternately stacked in the thickness direction.

6. The coil electronic component of claim 1 , wherein the metal shielding sheet has a thickness of 1 to 50 μm.

7. The coil electronic component of claim 1 , wherein the metal shielding sheet contains an amorphous or crystalline metal.

8. The coil electronic component of claim 1 , wherein the metal shielding sheet is disposed on both side surfaces of the magnetic body in the width direction.

9. The coil electronic component of claim 8 , wherein the metal shielding sheet is disposed on the upper and lower portions of the magnetic body in the thickness direction.

10. The coil electronic component of claim 1 , wherein the metal shielding sheet contains at least one selected from the group consisting of iron (Fe), silicon (Si), boron (B), chromium (Cr), aluminum (Al), copper (Cu), niobium (Nb), and nickel (Ni).

11. The coil electronic component of claim 1 , wherein the internal coil parts include first and second internal coil parts each having an end portion exposed to at least one external surface of the magnetic body.

12. The coil electronic component of claim 11 , further comprising first and second external electrodes each disposed at the at least one external surface of the magnetic body and electrically connected to the first and second internal coil parts, respectively.

13. The coil electronic component of claim 12 , wherein each of the first and second external electrodes includes a bending portion extending from a circumference thereof to cover portions of the upper and lower portions of the magnetic body in the thickness direction and portions of both side surfaces of the magnetic body in a width direction.

14. The coil electronic component of claim 13 , wherein the bending portion of each of the first and second external electrodes extends in a length direction to cover an outer portion of the metal shielding sheet.

Assignees

• Samsung Electro Mech

Inventors

• Choi Kang Ryong
• Park Il Jin
• Seo Jung Wook
• Jeon Jong Ok
• Chong Won Sik
• Lee Woo Jin
• Cho Jung Young

Classifications

• H01F27/33 Primary

  Arrangements for noise damping · CPC title

• H01F27/363

  made of electrically conductive material · CPC title

• H01F2017/008

  Electric or magnetic shielding of printed inductances · CPC title

• H01F27/2804

  Printed windings · CPC title

• H01F27/366 Primary

  made of ferromagnetic material · CPC title