Integrated magnetic inductors

Patent metadata

Field	Value
Publication number	US-10685776-B1
Application number	US-201715477841-A
Country	US
Kind code	B1
Filing date	Apr 3, 2017
Priority date	Apr 1, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

An integrated magnetic inductor is provided with an inductor coil, magnetic film, and a substrate. The magnetic film can be placed between the neighboring inductor coils, and the thickness of the magnetic film is greater than the coil thickness. In addition, the magnetic film includes exchange-coupled magnetic materials. The exchange-coupled magnetic materials provide improved permeability and f FMR at the frequency of interest for the integrated magnetic inductor.

First claim

What is claimed is:

1. A magnetic inductor comprising:
a substrate;
a coil mounted on the substrate, the coil having a plurality of segments;
a magnetic film mounted on the substrate between segments of the plurality of segments of the coil, wherein the magnetic film is an exchange-coupled magnetic material comprising a soft magnetic phase material and a hard magnetic phase material; and
wherein the coil has a first thickness and the magnetic film has a second thickness greater than the first thickness.

2. The magnetic inductor of claim 1 , wherein the magnetic film is positioned in contact with at least a portion of the coil.

3. The magnetic inductor of claim 1 , wherein the exchange-coupled magnetic material has a preselected volume fraction of the hard magnetic phase material to provide a predetermined saturation magnetization and magnetic anisotropy field.

4. The magnetic inductor of claim 1 , wherein the soft magnetic phase material includes at least one of spinel Ni—Zn—Co, Ni—Co, Ni—Zn, Mn—Zn, Ni—Zn—Cu ferrites, BaZnFe10O27, Ba3ME2Fe24O41 (ME=Co, Ni, Zn, Cu), Ni—Fe, Fe—Al—O, Fe—Hf—O, Fe—Sm—O, Co—Fe—Hf—O, Fe—Si—Al, Co—Zr—Ta, Fe—Al—N, Fe—Zr—N, Fe—Co—B, Fe—Co—B—Si, Fe—Co—N, Fe—Si, Ni—Fe—Co, or Fe—Al.

5. The magnetic inductor of claim 1 , wherein the hard magnetic phase material includes at least one of CoFe2O4, BaFe12O19, SrFe12O19, Mn—Bi, Mn—Al, Nd—Fe—B, Sm—Co, Fe—Pt, Sm—Fe—N, Fe—Cr—Co—Mo, Mn—Al—C, Al—Ni—Co, Pt—Co, Sm—Co—Fe—Cu, or Fe—Cr—Co.

6. The magnetic inductor of claim 1 , wherein the exchange-coupled magnetic material comprises a composite of the soft magnetic phase material and the hard magnetic phase material.

7. The magnetic inductor of claim 6 , wherein the soft magnetic phase material is in a matrix of the hard magnetic phase material.

8. The magnetic inductor of claim 6 , wherein the hard magnetic phase material is in a matrix of the soft magnetic phase material.

9. The magnetic inductor of claim 1 , wherein the exchange-coupled magnetic material comprises one or more layers of the soft magnetic phase material and one or more layers of the hard magnetic phase material.

10. The magnetic inductor of claim 9 , wherein the one or more layers of the soft magnetic phase material have a thickness less than the one or more layers of the hard magnetic phase material.

11. The magnetic inductor of claim 1 , wherein the magnetic film is spaced a predetermined distance from the segments of the plurality of segments of the coil.

12. A magnetic inductor comprising:
a substrate;
a coil mounted on the substrate, the coil having a plurality of segments arranged to form at least one spiral turn;
a magnetic film mounted on the substrate and positioned at an inner side and an outer side of each segment of the plurality of segments of the coil; and
wherein the magnetic film is an exchange-coupled magnetic material comprising a soft magnetic phase material and a hard magnetic phase material.

13. The magnetic inductor of claim 12 , wherein the coil has a first thickness and the magnetic film has a second thickness greater than the first thickness.

14. The magnetic inductor of claim 13 , wherein the second thickness is at least two times greater than the first thickness.

15. The magnetic inductor of claim 12 , wherein the magnetic film is spaced a predetermined distance from both the inner side and the outer side of each segment of the plurality of segments of the coil.

16. The magnetic inductor of claim 12 , wherein the exchange-coupled magnetic material comprises a composite of the soft magnetic phase material and the hard magnetic phase material.

17. The magnetic inductor of claim 16 , wherein the soft magnetic phase material is in a matrix of the hard magnetic phase material.

18. The magnetic inductor of claim 16 , wherein the hard magnetic phase material is in a matrix of the soft magnetic phase material.

19. The magnetic inductor of claim 12 , wherein the exchange-coupled magnetic material comprises at least one layer of a soft magnetic phase material positioned on at least one layer of a hard magnetic phase material.

Assignees

• Hong Yang Ki
• Lee Jaejin
• Univ Alabama

Inventors

• Hong Yang-Ki
• Lee Jaejin

Classifications

• H10W20/497

  Inductive arrangements or effects of, or between, wiring layers · CPC title

• H10D1/20

  Inductors · CPC title

• H01F10/3222 Primary

  Exchange coupled hard/soft multilayers, e.g. CoPt/Co or NiFe/CoSm (nanocomposite spring magnets H01F1/0579) · CPC title

• H01F2017/0066

  with a magnetic layer · CPC title

• H01F2003/106

  Magnetic circuits using combinations of different magnetic materials · CPC title