Chip electronic component and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9704640-B2
Application number	US-201514705886-A
Country	US
Kind code	B2
Filing date	May 6, 2015
Priority date	Sep 18, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

There is provided a chip electronic component including; a magnetic body containing magnetic metal powder; an internal coil part embedded in the magnetic body; and a plating spreading prevention part coated on a surface of the magnetic body. The plating spreading prevention part contains phosphate-based glass. Whereby, plating spread generated in the surface of the chip electronic component at the time of forming the external electrodes may be prevented.

First claim

What is claimed is:

1. A chip electronic component comprising:
a magnetic body containing a magnetic metal powder;
an internal coil part embedded in the magnetic body; and
a plating spreading prevention part coated on a surface of the magnetic body,
wherein the plating spreading prevention part contains phosphate-based glass,
wherein the plating spreading prevention part is coated on a protruded portion of the magnetic metal powder, and
wherein the protruded portion protrudes from the surface of the magnetic body and is exposed to the surface of the magnetic body.

2. The chip electronic component of claim 1 , wherein the phosphate-based glass contains one or more selected from the group consisting of iron phosphate, zinc phosphate, and manganese phosphate.

3. The chip electronic component of claim 1 , further comprising a silicon coating layer disposed on the magnetic body on which the plating spreading prevention part is formed.

4. The chip electronic component of claim 1 , wherein the magnetic body contains a first magnetic metal powder and a second magnetic metal powder having a D 50 smaller than a D 50 of the first magnetic metal powder,
the first magnetic metal power having a D 50 of 18 μm to 22 μm, and the second magnetic metal power having a D 50 of 2 μm to 4 μm.

5. The chip electronic component of claim 1 , wherein the magnetic body contains the first magnetic metal powder and the second magnetic metal powder having an average particle size smaller than an average particle size of the first magnetic metal powder,
the first magnetic metal power having a particle size of 11 μm to 53 μm, and the second magnetic metal power having a particle size of 0.5 μm to 6 μm.

6. The chip electronic component of claim 1 , further comprising external electrodes disposed on an outer portion of the magnetic body to be connected to end portions of the internal coil part,
wherein the external electrodes include conductive resin layers and plating layers formed on the conductive resin layers.

7. The chip electronic component of claim 6 , wherein the plating layers contain one or more selected from the group consisting of nickel (Ni), copper (Cu), and tin (Sn).

8. A chip electronic component comprising:
a magnetic body containing a magnetic metal powder;
an internal coil part embedded in the magnetic body; and
a plating spreading prevention part coated on a magnetic metal powder exposed to a surface of the magnetic body,
wherein the plating spreading prevention part contains glass,
wherein the plating spreading prevention part is coated on a protruded portion of the magnetic metal powder, and
wherein the protruded portion protrudes from the surface of the magnetic body and is exposed to the surface of the magnetic body.

Assignees

• Samsung Electro Mech

Inventors

• Choi Youn Kyu
• Kim Hye Ah
• Yang Yun Young
• Kang Mi Jung
• Choi Jae Yeol

Classifications

• H01F17/04

  with magnetic core · CPC title

• H01F17/0006

  Printed inductances (printed coils for dynamo-electric machines H02K3/26; printed circuits H05K) · CPC title

• H01F2017/048

  with encapsulating core, e.g. made of resin and magnetic powder · CPC title

• H01F27/292 Primary

  Surface mounted devices · CPC title

• H01F17/0013

  with stacked layers · CPC title