Inductor

Patent metadata

Field	Value
Publication number	US-10918166-B2
Application number	US-202016751415-A
Country	US
Kind code	B2
Filing date	Jan 24, 2020
Priority date	Jul 25, 2017
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An inductor includes a coil having a plurality of coil patterns and external electrodes connected thereto. An innermost coil pattern and an outermost coil pattern in the coil grow using first and second insulating wall as growth guides and the inductor has a structure in which there is no deviation in thickness and shape between the coil patterns.

First claim

What is claimed is:

1. An inductor comprising:
a body including:
a support member including a through hole,
a coil including a plurality of coil patterns disposed on the support member and connected to each other to have an overall spiral shape, each of the plurality of coil patterns including a first plating layer and a second plating layer stacked on the first plating layer,
a first insulating wall being at least partial contact with an innermost coil pattern among the plurality of coil patterns,
a second insulating wall being at least partial contact with an outermost coil pattern among the plurality of coil patterns, and
an insulating film filling spaces between the plurality of coil patterns, covering upper surfaces of the first and second insulating walls and enclosing at least a portion of surfaces of the first and second insulating walls that do not contact with the innermost coil pattern or the outermost coil pattern among surfaces of the first and second insulating walls; and

first and second external electrodes disposed on an external surface of the body and connected to the coil.

2. The inductor of claim 1 , wherein an entire side surface of the innermost coil pattern is contact with the first insulating wall, and an entire side surface of the outermost coil pattern is contact with the second insulating wall.

3. The inductor of claim 1 , wherein the first insulating wall extends to a position equal to or higher than a position of an uppermost surface of the innermost coil pattern, and the second insulating wall extends to a position equal to or higher than a position of an uppermost surface of the outermost coil pattern.

4. The inductor of claim 1 , wherein each of the first and second insulating walls is a single insulating layer.

5. The inductor of claim 1 , wherein each of the first and second insulating walls has an aspect ratio of 3.0 or more.

6. The inductor of claim 1 , wherein each of the plurality of coil patterns is composed of a seed layer and a plurality of plating layers formed on the seed layer.

7. The inductor of claim 6 , wherein the seed layer is disposed on an upper surface of the support member, and except for a surface of the seed layer being in contact with the support member, the other surfaces of the seed layer are enclosed by the plurality of plating layers.

8. The inductor of claim 1 , wherein a virtual line connecting the center of a lower surface of the first plating layer to the center of an upper surface thereof coincides with a virtual line connecting the center of a lower surface of the second plating layer to the center of an upper surface thereof.

9. The inductor of claim 6 , wherein among the plurality of plating layers, a plating layer disposed directly on the seed layer is an isotropic plating layer, and the other plating layers are anisotropic plating layers.

10. The inductor of claim 1 , wherein a portion of the insulating film disposed on upper surfaces of the plurality of coil patterns has a shape corresponding to the upper surfaces of the plurality of coil patterns.

11. The inductor of claim 1 , wherein the first and second insulating walls contain a permanent type epoxy-based insulating material.

12. The inductor of claim 1 , wherein the first and second insulating walls do not contain concave and convex portions in a growth direction of the coil pattern.

13. The inductor of claim 1 , wherein the first and second insulating walls and the insulating film are made of materials different from each other.

14. The inductor of claim 1 , wherein each of the plurality of coil patterns has a convex upper surface.

15. The inductor of claim 1 , wherein a magnetic material is provided on the support member and a surface of the insulating film.

16. The inductor of claim 1 , wherein the coil includes an upper coil formed on an upper surface of the support member and a lower coil formed on a lower surface of the support member, and the upper and lower coils are electrically connected to each other through a via in the support member.

17. The inductor of claim 6 , wherein a thickness of the first insulating wall is greater than a sum of thicknesses of the seed layer and the first and second plating layers of the innermost coil pattern, and
a thickness of the second insulating wall is greater than a sum of thicknesses of the seed layer and the first and second plating layers of the outermost coil pattern.

Assignees

• Samsung Electro Mech

Inventors

• Choi Woon Chul

Classifications

• H01F2017/0073

  with a special conductive pattern, e.g. flat spiral · CPC title

• H01F2005/006

  with conical spiral form · CPC title

• H01F27/32

  Insulating of coils, windings, or parts thereof · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F27/25 Primary

  made from strips or ribbons (H01F27/26 takes precedence) · CPC title