Coil electronic component

• US 10,134,520 B2
• Filed: 03/22/2016
• Issued: 11/20/2018
• Est. Priority Date: 08/18/2015
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Moon, Byeong Cheol
• Primary Examiner(s): Lian, Mangtin
• Application Number:
  US15/077,405
• Publication Number:
  US 20170053732A1
• Time in Patent Office: 973 Days
• Field of Search: 336192, 336200, 336223
• 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 27/292 Surface mounted devices

Abstract

A coil electronic component includes a magnetic body in which a coil having leads exposed to side surfaces of the coil is disposed. External terminals are connected to the leads and disposed on outer surfaces of the magnetic body. Additionally, the external terminals are folded to have side surface portions which are disposed on end surfaces of the magnetic body, and bottom surface portions which are disposed on a bottom surface of the magnetic body.

Claims

1. A coil electronic component comprising:

a magnetic body in which a coil having leads exposed to side surfaces of the coil is disposed; and

external terminals connected to the leads and disposed on outer surfaces of the magnetic body,

wherein the external terminals each include a side surface portion and a bottom surface portion, the side surface portions being disposed on end surfaces of the magnetic body, the bottom surface portions being folded in a direction perpendicular to the stacking direction of the coil

the leads include lead portions led from both ends of the coil, and exposed portions coupled to the lead portions and exposed at opposing end surfaces of the magnetic body in a length direction of the magnetic body,

the external terminals are integrally formed with the exposed portions of the leads,

the stacking direction of the coil is parallel to the bottom surface of the magnetic body,

the leads are disposed to be perpendicular to the stacking direction of the coil, the bottom surface of the magnetic body and the side surface portions of the external terminals,

widths of the bottom surface portions and side surface portions are less than a width of the magnetic body, and

the leads include a first lead and a second lead, and a lead portion of the first lead is disposed between an exposed portion of the first lead and a first side surface of the magnetic body, and a lead portion of the second lead is disposed between an exposed portion of the second lead and a second side surface of the magnetic body, the second side surface being opposed to the first side surface of the magnetic body.

2. The coil electronic component of claim 1, wherein the leads are formed by welding the exposed portions and the lead portions.

3. The coil electronic component of claim 1, wherein the coil is disposed such that a direction of a magnetic field produced when a current is applied to the coil is parallel to the bottom surface of the magnetic body.

4. The coil electronic component of claim 1, wherein the side surface portions and bottom surface portions of the external terminal have substantially planar surfaces, a main planar surface of each side surface portion is parallel to a corresponding end surface of the magnetic body, and a main planar surface of each bottom surface portion is parallel to the bottom surface of the magnetic body.

5. The coil electronic component of claim 4, wherein the main planar surface of each side surface portion is co-planar with the corresponding end surface of the magnetic body, and the main planar surface of each bottom surface portion is co-planar with the bottom surface of the magnetic body.

6. A coil electronic component comprising:

a magnetic body in which a coil having leads exposed to side surfaces of the magnetic body is disposed; and

external terminals connected to the leads and disposed on an outer surface of the magnetic body,

wherein the external terminals each include a side surface portion and a bottom surface portion, the side surface portions being disposed on end surfaces of the magnetic body in a length direction of the magnetic body, the bottom surface portions being folded in a direction perpendicular to the stacking direction of the coil

the leads include lead portions led from both ends of the coil, and exposed portions coupled to the lead portions and exposed at opposing end surfaces of the magnetic body in the length direction of the magnetic body,

the external terminals are integrally formed with the exposed portions of the leads,

the stacking direction of the coil is parallel to the bottom surface of the magnetic body,

the leads are disposed to be perpendicular to the stacking direction of the coil, and the bottom surface portions and the side surface portions of the external terminals,

widths of the bottom surface portions and side surface portions are less than a width of the magnetic body, and

the leads include a first lead and a second lead, and a lead portion of the first lead is disposed between an exposed portion of the first lead and a first side surface of the magnetic body, and a lead portion of the second lead is disposed between an exposed portion of the second lead and a second side surface of the magnetic body, the second side surface being opposed to the first side surface of the magnetic body.

7. The coil electronic component of claim 6, wherein the exposed portions, the side surface portions, and the bottom surface portions of the external terminals are integrally formed by dicing a metal frame, and

the leads are formed by welding the exposed portions and the lead portions to each other.

8. The coil electronic component of claim 6, wherein the coil is disposed such that a direction of a magnetic field produced when a current is applied to the coil is parallel to the bottom surface of the magnetic body.

9. The coil electronic component of claim 6, wherein a main planar surface of each side surface portion of each external terminal is parallel to a corresponding end surface of the magnetic body, and a main planar surface of each bottom surface portion of each external terminal is parallel to the bottom surface of the magnetic body.

10. The coil electronic component of claim 9, wherein the main planar surface of each side surface portion is co-planar with the corresponding end surface of the magnetic body, and the main planar surface of each bottom surface portion is co-planar with the bottom surface of the magnetic body.

11. A coil electronic component comprising:

a coil having first and second leads; and

first and second external terminals each connected to a respective one of the first and second leads,

wherein each of the first and second external terminals is an integrally formed polyhedron including;

a side surface portion shaped as a hexahedron; and

a bottom surface portion shaped as a hexahedron, and having a main surface that is non-parallel to a main surface of the side surface portion and parallel to a stacking direction of the coil;

the first and second leads include lead portions led from both ends of the coil, and exposed portions coupled to the lead portions and exposed at opposing end surfaces of the magnetic body in a length direction of the magnetic body,

the external terminals are integrally formed with the exposed portions of the leads,

a stacking direction of the coil is parallel to a bottom surface of the magnetic body,

the first and second leads are disposed to be perpendicular to the stacking direction of the coil and the side surface portions and bottom surface portions of the first and second external terminals,

each of the first and second external terminals is bent in a direction parallel to the stacking direction of the coil and parallel to the bottom surface portion to form the side surface portion, and a direction perpendicular to the stacking direction of the coil to form the bottom surface portion,

widths of the bottom surface portions and side surface portions are less than a width of the magnetic body, and

a lead portion of the first lead is disposed between an exposed portion of the first lead and a first side surface of the magnetic body, and a lead portion of the second lead is disposed between an exposed portion of the second lead and a second side surface of the magnetic body, the second side surface being opposed to the first side surface of the magnetic body.

12. The coil electronic component of claim 11, wherein a main surface of a hexahedron is a largest planar surface of the hexahedron, and the main surfaces of the exposed portions of the first and second external terminals are orthogonal to the main surfaces of the side surface portions and the bottom surface portions of the first and second external terminals.

13. The coil electronic component of claim 11, wherein the main surfaces of the side surface portions of the first and second external terminals are parallel to each other, the main surfaces of the exposed portions of the first and second external terminals are parallel to each other, and the main surfaces of the bottom surface portions of the first and second external terminals are co-planar with each other.

14. The coil electronic component of claim 11, wherein the coil is disposed such that a direction of a magnetic field produced when a current is applied to the coil is parallel to the main surfaces of each of the side surface portions and the bottom surface portions of the first and second external terminals.

15. The coil electronic component of claim 11, further comprising:

a magnetic body in which the coil is disposed,

wherein the magnetic body has a substantially hexahedron shape, the side surface portions of the first and second external terminals are disposed on side surfaces of the magnetic body, and the bottom surface portions of the first and second external terminals are disposed on a bottom surface of the magnetic body.

16. The coil electronic component of claim 15, wherein the coil has an oval shape having an long axis, and the side surface portions of the first and second external terminals are disposed on side surfaces of the magnetic body that are opposite each other in a direction of the long axis of the oval shape coil.