Electronic component and circuit board having the same mounted thereon

Patent metadata

Field	Value
Publication number	US-2015145629-A1
Application number	US-201414552867-A
Country	US
Kind code	A1
Filing date	Nov 25, 2014
Priority date	Nov 26, 2013
Publication date	May 28, 2015
Grant date	—

Abstract

An electronic component and a circuit board having the same mounted thereon. The electronic component includes: a base part; a coil part provided on the base part and including a coil formed by disposing conductive patterns in a spiral shape and an external terminal connected to an end portion of the coil; and a cover part including an external electrode having a first surface contacting an upper surface of the external terminal and a second surface opposing the first surface and a magnetic material part provided on the coil part, made of a magnetic material, and exposing the second surface, wherein a surface area of the first surface is larger than a surface area of the second surface.

First claim

What is claimed is:

1 . An electronic component comprising:
a base part made of a magnetic material; a coil part provided on the base part and including a coil formed by disposing conductive patterns in a spiral shape and an external terminal connected to an end portion of the coil; and a cover part including an external electrode, the external electrode having a first surface contacting an upper surface of the external terminal and a second surface opposing the first surface, the cover part including a magnetic material part provided on the coil part, the magnetic material part being made of a magnetic material and being configured to expose the second surface of the external electrode, wherein a surface area of the first surface of the external electrode is larger than a surface area of the second surface of the external electrode.

2 . The electronic component according to claim 1 , wherein a maximum value of a width of the first surface of the external electrode in a long side direction is larger than a maximum value of a width of the second surface of the external electrode in the long side direction.

3 . The electronic component according to claim 2 , wherein the maximum value of the width of the second surface of the external electrode in the long side direction is 0.4 to 0.9 times the maximum value of the width of the first surface of the external electrode in the long side direction.

4 . The electronic component according to claim 2 , wherein a maximum value of a width of the first surface of the external electrode in a short side direction is larger than a maximum value of a width of the second surface of the external electrode in the short side direction.

5 . The electronic component according to claim 4 , wherein the maximum value of the width of the second surface of the external electrode in the short side direction is 0.5 to 0.9 times the maximum value of the width of the first surface of the external electrode in the short side direction.

6 . The electronic component according to claim 3 , wherein a maximum value of a width of the first surface of the external electrode in a short side direction is larger than a maximum value of a width of the second surface of the external electrode in the short side direction.

7 . The electronic component according to claim 3 , wherein a maximum value of a width of the second surface of the external electrode in a short side direction is 0.5 to 0.9 times a maximum value of a width of the first surface of the external electrode in the short side direction.

8 . The electronic component according to claim 1 , wherein the surface area of the second surface of the external electrode is 0.2 to 0.8 times the surface area of the first surface of the external electrode.

9 . The electronic component according to claim 4 , wherein at least one of a condition in which an angle between a surface including a long side of the first surface of the external electrode and a long side of the second surface of the external electrode and the short side of the first surface of the external electrode is 80 to 86 degrees and a condition in which an angle between a surface including a short side of the first surface of the external electrode and a short side of the second surface of the external electrode and the long side of the first surface of the external electrode is 70 to 86 degrees is satisfied.

10 . The electronic component according to claim 2 , wherein at least one of a condition in which an angle between a surface including a long side of the first surface of the external electrode and a long side of the second surface of the external electrode and the short side of the first surface of the external electrode is 80 to 86 degrees and a condition in which an angle between a surface including a short side of the first surface of the external electrode and a short side of the second surface of the external electrode and the long side of the first surface of the external electrode is 70 to 86 degrees is satisfied.

11 . The electronic component according to claim 1 , wherein a maximum value of a width of the first surface of the external electrode in a short side direction is larger than a maximum value of a width of the second surface of the external electrode in the short side direction.

12 . The electronic component according to claim 11 , wherein the maximum value of the width of the second surface of the external electrode in the short side direction is 0.5 to 0.9 times the maximum value of the width of the first surface of the external electrode in the short side direction.

13 . The electronic component according to claim 1 , wherein at least one of a condition in which an angle between a surface including a long side of the first surface of the external electrode and a long side of the second surface of the external electrode and the short side of the first surface of the external electrode is 80 to 86 degrees and a condition in which an angle between a surface including a short side of the first surface of the external electrode and a short side of the second surface of the external electrode and the long side of the first surface of the external electrode is 70 to 86 degrees is satisfied.

14 . An electronic component comprising:
a base part made of a magnetic material; a coil part provided on the base part and including a coil formed by disposing conductive patterns in a spiral shape and an external terminal connected to an end portion of the coil; an external electrode having a first surface contacting the external terminal, a second surface opposing the first surface, and a side surface connecting between the first surface and the second surface; and a magnetic material part made of a magnetic material and covering a surface of the coil part and the side surface of the external electrode, wherein a vertical cross section of the external electrode cut in a direction perpendicular to at least one of the first surface of the external electrode and the second surface of the external electrode has a trapezoidal shape.

15 . The electronic component according to claim 14 , wherein an intersection line between the side surface of the external electrode and the vertical cross section is a straight line.

16 . The electronic component according to claim 14 , wherein an intersection line between the side surface of the external electrode and the vertical cross section is a curved line.

17 . The electronic component according to claim 16 , wherein a gradient of a tangent line of the curved line is increased from the first surface of the external electrode toward the second surface of the external electrode.

18 . An electronic component comprising:
a coil part including a coil formed by disposing conductive patterns in a spiral shape and an external terminal connected to one end of the coil, and the coil part being provided between a base part made of a magnetic material and a magnetic material part; and an external electrode having a first surface contacting the external terminal and a second surface opposing the first surface, and the second surface being exposed to an outside of the magnetic material part, wherein a side surface of the external electrode forms an inclination with respect to at least one of the first surface and the second surface of the external electrode.

19 . The electronic component according to claim 18 , wherein an angle formed by the side surface and the at least one first and second surface of the external electrode is 70 to 86 degrees.

Assignees

• Samsung Electro Mech

Inventors

• Chang Geon Se
• Kweon Young Do
• Yang Jin Hyuck

Classifications

• H01F27/292

  Surface mounted devices · CPC title

• H01F17/0006

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

• H01F27/2804 Primary

  Printed windings · CPC title

• H01F2027/2809

  on stacked layers · CPC title

• H01F27/29 Primary

  Terminals; Tapping arrangements {for signal inductances} · CPC title