THIN FILM-TYPE COIL COMPONENT AND METHOD OF FABRICATING THE SAME

• US 20130169399A1
• Filed: 03/12/2012
• Published: 07/04/2013
• Est. Priority Date: 12/29/2011
• Status: Active Grant

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: YOO, Young Seuck, Ahn, Young Ghyu, Kim, Yong Suk, Wi, Sung Kwon, Park, Sang Soo, Hur, Kang Heon
• Granted Patent: US 9,064,626 B2
• Time in Patent Office: Days
• US Class Current: 336/180
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/29 Terminals; Tapping arrangements for signal inductances
• CPC Class Codes: H01F 41/042 by thin film techniques

Abstract

There is provided a thin film-type coil component having a size equal to or less than 0806 and including a ceramic main body, external electrodes including a plurality of first external electrodes formed on one surface of the ceramic main body and a plurality of second external electrodes formed on the other surface facing one surface of the ceramic main body, and a coil unit including a plurality of coil layers stacked in the ceramic main body, thereby obtaining low direct current (DC) resistance.

Claims

1. A thin film-type coil component, comprising:

a main body; and

external electrodes including a plurality of first external electrodes formed on one surface of the main body and a plurality of second external electrodes formed on the other surface facing one surface of the main body,

the main body including;

an upper substrate and a lower substrate;

an insulating layer formed between the upper substrate and the lower substrate; and

a coil layer disposed in the insulating layer and including first and second coils as a double coil, wherein the first and second coils are wound to be parallel to each other in the same direction on the same plane, and wherein one ends of the first and second coils are connected to the external electrodes, and the other ends of the first and second coils are respectively connected to first and second centers, and

the main body including a plurality of the coil layers, and the first and second coils being connected to each other in parallel.

2. The thin film-type coil component of claim 1, wherein the thin film-type coil component has a size equal to or less than 0806.

3. The thin film-type coil component of claim. 1, wherein the first and second centers of neighboring coil layers among the plurality of coil layers are connected through via conductors, respectively.

4. The thin film-type coil component of claim 1, wherein the neighboring coil layers among the plurality of coil layers are connected to first and second external electrodes, respectively.

5. The thin film-type coil component of claim 1, wherein coils of the neighboring coil layers among the plurality of coil layers are wound in opposite directions.

6. The thin film-type coil component of claim 1, wherein the first and second centers are spaced apart from each other.

7. The thin film-type coil component of claim 1, wherein the double coil has a polygonal shape, a circular shape, an oval shape, or an irregular shape.

8. The thin film-type coil component of claim 1, wherein the double coil includes at least one selected from the group consisting of gold (Au), silver (Ag), platinum (Pt), copper (Cu), nickel (Ni), palladium (Pd), and an alloy thereof.

9. The thin film-type coil component of claim 1, wherein the first coil and the second coil are connected to the external electrodes through outlet terminals, respectively.

10. The thin film-type coil component of claim 9, wherein portions of the outlet terminals exposed from a surface of the main body are covered by the external electrodes.

11. The thin film-type coil component of claim 9, wherein the outlet terminals include at least one selected from the group consisting of Au, Ag, Pt, Cu, Ni, Pd, and an alloy thereof.

12. The thin film-type coil component of claim 9, wherein the double coil and the outlet terminals include the same material.

13. The thin film-type coil component of claim 1, wherein the upper substrate and the lower substrate are formed of a magnetic material.

14. The thin film-type coil component of claim 1, wherein the magnetic material includes nickel-zinc-copper (Ni—

Zn—

Cu) ferrite.

15. The thin film-type coil component of claim 1, wherein the insulating layer includes a photosensitive polymer insulating material.

16. The thin film-type coil component of claim 1, wherein the plurality of first and second external electrodes are arranged to face each other.

17. The thin film-type coil component of claim 1, wherein the external electrodes extend in a thickness direction of the main body.

18. The thin film-type coil component of claim 1, wherein the external electrodes extend onto portions of an upper surface and a lower surface of the main body.

19. The thin film-type coil component of claim 1, wherein the external electrodes include at least one selected from the group consisting of Au, Ag, Pt, Cu, Ni, Pd, and an alloy thereof.

20. A method of fabricating a thin film-type coil component, comprising:

a first operation of forming a first double coil having first and second centers on a lower substrate;

a second operation of forming an insulating layer on the lower substrate having the first double coil formed therein;

a third operation of forming via conductors in portions of the insulating layer corresponding to the first and second centers of the first double coil;

a fourth operation of forming a second double coil on the insulating layer so as to have centers that are respectively formed to correspond to the via conductors;

a fifth operation of forming a stack structure including a required number of layers formed by repeating the second through fourth operations; and

a sixth operation of forming an upper substrate on the stack structure.

21. The method of claim 20, wherein the first and second double coils are wound in opposite directions.

22. The method of claim 20, wherein the first and second centers are spaced apart from each other.

23. The method of claim 20, wherein each of the first and second double coils has a polygonal shape, a circular shape, an oval shape, or an irregular shape.

24. The method of claim 20, wherein each of the first and second double coils includes at least one selected from the group consisting of Au, Ag, Pt, Cu, Ni, Pd, and an alloy thereof.