Inductor and manufacturing method thereof

• US 10,014,102 B2
• Filed: 07/28/2016
• Issued: 07/03/2018
• Est. Priority Date: 10/11/2013
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Choi, Woon Chul, Kim, Sung Hyun, Cha, Hye Yeon
• Primary Examiner(s): Lian, Mangtin
• Application Number:
  US15/221,968
• Publication Number:
  US 20160336107A1
• Time in Patent Office: 705 Days
• Field of Search: 336200, 336223, 336192
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 41/042 by thin film techniques

Abstract

An inductor may include: a body, and a first and a second external electrode formed on end surfaces of the body. The body may include a coil support layer, a conductive coil formed on at least one surface of the coil support layer, a lamination part formed in a gap of the conductive coil and on an upper surface thereof, an insulating coating part formed to enclose an overall surface of the conductive coil on which the lamination part is formed, and upper and lower cover layers covering the overall surface of the conductive coil on which the insulating coating part is formed.

Claims

1. An inductor comprising:

a body, including;

a coil support layer,

a conductive coil on a surface of the coil support layer,

a first insulating layer between adjacent turns of the conductive coil and extending higher than an upper surface of the conductive coil,

a second insulating layer covering the first insulating layer and the conductive coil, and

a cover layer comprising magnetic material and covering the second insulating layer; and

external electrodes on respective end surfaces of the body,

wherein a gap disposed between the adjacent turns of the conductive coil is substantially filled with the first insulating layer, and

wherein the second insulating layer extends to cover at least one of an outermost side end portion of the first insulating layer and an innermost side end portion of the first insulating layer in a length direction of the body.

2. The inductor of claim 1, wherein a width of the first insulating layer disposed between the adjacent turns is smaller than that of the conductive coil.

3. The inductor of claim 1, wherein the first insulating layer is formed of a material different from that of the second insulating layer.

4. The inductor of claim 1, wherein the first insulating layer encloses one or more turns of the conductive coil.

5. The inductor of claim 4, wherein the first insulating layer covers a portion of an upper surface at least one of an inner coil or outer coil of the conductive coil.

6. The inductor of claim 1, wherein the conductive patterns have a spiral shape.

7. The inductor of claim 1, wherein the first insulating layer has an average thickness of about 0.5 μ

m to about 15 μ

m.

8. The inductor of claim 1, wherein the second insulating layer has an average thickness of about 0.5 μ

m to about 15 μ

m.

9. The inductor of claim 1, wherein the gap between the adjacent turns of the conductive coil is about 8 μ

m to about 12 μ

m.

10. The inductor of claim 1, wherein the second insulating layer is formed of a material containing epoxy.

11. The inductor of claim 1, wherein the coil support layer is a substrate formed of an insulating material.

12. The inductor of claim 1, wherein the conductive coil has a thickness of about 100 μ

m or more.

13. An inductor comprising:

a body, including;

a coil support layer,

an upper conductive coil on a surface of the coil support layer,

a lower conductive coil on an opposite surface of the coil support layer and connected to the upper conductive coil,

a first upper insulating layer between adjacent turns of the upper conductive coil and extending higher than an upper surface of the upper conductive coil,

a first lower insulating layer between adjacent turns of the lower conductive coil and extending lower than a lower surface of the lower conductive coil,

a second upper insulating layer enclosing the first upper insulating layer and the upper conductive coil,

a second lower insulating layer enclosing the first lower insulating layer and the lower conductive coil,

an upper cover layer comprising magnetic material and covering the second upper insulating layer, and

a lower cover layer comprising magnetic material and covering the second lower insulating layer;

a first external electrode on an end surface of the body and connected to the upper conductive coil; and

a second external electrode on an opposite surface of the body and connected to the lower conductive coil,

wherein a gap disposed between the adjacent turns of the upper conductive coil is substantially filled with the first upper insulating layer,

wherein the second upper insulating layer extends to cover at least one of an outermost side end portion of the first upper insulating layer and an innermost side end portion of the first upper insulating layer in a length direction of the body,

wherein a gap disposed between the adjacent turns of the lower conductive coil is substantially filled with the first lower insulating layer, and

wherein the second lower insulating layer extends to cover at least one of an outermost side end portion of the first lower insulating layer and an innermost side end portion of the first lower insulating layer in the length direction of the body.