# US 2014/0191716 A1 · Soft magnetic layer, receiving antenna, and wireless power receiving apparatus comprising the same

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- Number: US 2014/0191716 A1
- Document ID: US20140191716A1
- Status: Published application
- Kind: A1
- Application number: 14/147,193
- Filed: 2014-01-03
- Published: 2014-07-10
- Earliest claimed: 2013-01-04
- Assignees: LG Innotek Co., Ltd.
- Applicants: LG Innotek Co., Ltd.
- Inventors: Sang Won LEE; So Yeon KIM; Jin Mi NOH; Seok BAE; Jai Hoon YEOM
- Web page: https://patentgrep.com/patent/US20140191716A1

## CPC

- H01F 38/14: Inductive couplings
- H01Q 7/08: Ferrite rod or like elongated core
- H02J 50/10: using inductive coupling
- Y10T 428/12472: Microscopic interfacial wave or roughness
- Y10T 428/12958: Next to Fe-base component
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A soft magnetic layer for a receiving antenna of a wireless power receiving apparatus includes a first soft magnetic member containing a Mn—Zn ferrite material, and a second soft magnetic member containing a Ni—Zn ferrite material. Accordingly, electromagnetic energy collecting performance of the receiving antenna of the wireless power receiving apparatus is improved, and thereby power transmission efficiency is maximized.

## Claims

### Claim 1

A soft magnetic layer for a receiving antenna of a wireless power receiving apparatus, comprising:
a first soft magnetic member containing a Mn—Zn ferrite material, and a second soft magnetic member containing a Ni—Zn ferrite material.

### Claim 2 (depends on 1)

The soft magnetic layer of claim 1, wherein the first soft magnetic member is formed on the second soft magnetic member.

### Claim 3 (depends on 1)

The soft magnetic layer of claim 1, wherein the second soft magnetic member surrounds an edge of the first soft magnetic member.

### Claim 4 (depends on 1)

The soft magnetic layer of claim 1, wherein the first soft magnetic member surrounds an edge of the second soft magnetic member.

### Claim 5 (depends on 1)

The soft magnetic layer of claim 1, wherein the second soft magnetic member has a groove formed thereon, and the first soft magnetic member is seated on the groove.

### Claim 6 (depends on 1)

The soft magnetic layer of claim 1, wherein the first soft magnetic member has a groove formed thereon, and the second soft magnetic member is seated on the groove.

### Claim 7 (depends on 1)

The soft magnetic layer of claim 1, further comprising a fixing member formed on at least one of an upper surface and a lower surface of the first soft magnetic member or the second soft magnetic member, and configured to fix the first soft magnetic member or the second soft magnetic member.

### Claim 8 (depends on 1)

The soft magnetic layer of claim 1, wherein the Mn—Zn ferrite includes at least one of Mn1−xZnxFe2O4 (0≦x<1) and Mn1−x−yZnxFeyFe2−yO4 (0≦x<1, 0≦y<1).

### Claim 9 (depends on 1)

The soft magnetic layer of claim 1, wherein the soft magnetic layer is formed as at least one of a sheet, a plate, and a pellet.

### Claim 10 (depends on 1)

The soft magnetic layer of claim 1, wherein the ratio of the area of the second magnetic member to the first soft magnetic member is 0.001 to 2.

### Claim 11 (depends on 1)

The soft magnetic layer of claim 1, wherein the ratio of the area of the first magnetic member to the second soft magnetic member is 0.001 to 2.

### Claim 12

A receiving antenna of a wireless power receiving apparatus which wirelessly charges with power, comprising:
a substrate;
a soft magnetic layer containing a first soft magnetic member containing a Mn—Zn ferrite material and a second soft magnetic member containing a Ni—Zn ferrite material, which are formed on the substrate; and
a receiving coil formed on the soft magnetic layer.

### Claim 13

A wireless power receiving apparatus which wirelessly charges with power, comprising:
a substrate;
a soft magnetic layer containing a first soft magnetic member containing a Mn—Zn ferrite material and a second soft magnetic member containing a Ni—Zn ferrite material, which are formed on the substrate;
a receiving coil formed on the soft magnetic layer;
a circuit connected to the receiving coil, and configured to convert electromagnetic energy to electric energy; and
a storage member configured to store the electric energy.