Magnetic multilayer structure

Patent metadata

Field	Value
Publication number	US-9929209-B2
Application number	US-201715414997-A
Country	US
Kind code	B2
Filing date	Jan 25, 2017
Priority date	Jan 15, 2014
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A mechanism is provided for an integrated laminated magnetic device. A substrate and a multilayer stack structure form the device. The multilayer stack structure includes alternating magnetic layers and diode structures formed on the substrate. Each magnetic layer in the multilayer stack structure is separated from another magnetic layer in the multilayer stack structure by a diode structure.

First claim

What is claimed is:

1. An integrated laminated magnetic device, comprising:
a substrate; and
a multilayer stack structure which includes alternating magnetic layers and diode structures formed on the substrate;
wherein each magnetic layer in the multilayer stack structure is separated from another magnetic layer in the multilayer stack structure by a diode structure.

2. The device of claim 1 , wherein the multilayer stack structure comprises repeated sandwiches of two of the magnetic layers having the diode structure interposed in between.

3. The device of claim 1 , wherein a sandwich of the magnetic layer, the diode structure, and the another magnetic layer repeats until the multilayer stack structure is formed of multiple sandwiches.

4. The device of claim 1 , wherein the magnetic layers are disposed to form the multilayer stack structure by electroplating.

5. The device of claim 1 , wherein the diode structures are disposed to form the multilayer stack structure by electroplating.

6. The device of claim 1 , wherein the diode structures are forwarded bias in a same direction in the multilayer stack structure.

7. The device of claim 6 , wherein the same direction is a forward bias direction.

8. The device of claim 7 , wherein an electrical eddy current in the multilayer stack structure is inhibited from flowing in a reverse bias direction between the each magnetic layer and the another magnetic layer.

9. The device of claim 6 , wherein the diode structures in the multilayer stack structure each comprise a p-type material having positive charge carriers and an n-type material having negative charge carriers.

10. The device of claim 1 , wherein each of the alternating magnetic layers has a thickness of about 0.3 micrometers (μm) to 1.3 μm.

11. The device of claim 1 , wherein the alternating magnetic layers include magnetic material.

12. The device of claim 11 , wherein the magnetic material is NiFe.

13. The device of claim 11 , wherein the magnetic material is selected from the group consisting of NiFe, CoWB, Fe, CoFeB, CoWP, CoP, and NiFeCo.

14. The device of claim 11 , wherein the magnetic material is composition of about 80% Ni and 20% Fe to form NiFe.

15. The device of claim 14 , wherein a magnetic permeability of NiFe is 500 to 1000 H/m.

16. The device of claim 15 , wherein a resistivity of NiFe is about 20 μ·Ω·cm.

17. The device of claim 11 , wherein the magnetic material is composition of about 45% Ni and 55% Fe to form NiFe.

18. The device of claim 17 , wherein a magnetic permeability of NiFe is 200 to 700 H/m.

19. The device of claim 18 , wherein the resistivity of NiFe is about 40 μ·Ω·cm.

20. The device of claim 11 , wherein the magnetic material is CoWP;
wherein a composition CoWB is majority Co such that a magnetic permeability I about 100 to 1000 H/m.

Assignees

• IBM

Inventors

• Herget Philipp
• O'Sullivan Eugene J
• Romankiw Lubomyr T
• Wang Naigang
• Webb Bucknell C

Classifications

• H01L28/10

  Electricity · mapped topic

• H01F27/2804

  Printed windings · CPC title

• H01L43/02

  Electricity · mapped topic

• H01L43/10

  Electricity · mapped topic

• H01L43/12

  Electricity · mapped topic