Magnetic sheet for communications module

• US 10,595,450 B2
• Filed: 04/20/2016
• Issued: 03/17/2020
• Est. Priority Date: 05/22/2015
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: WITS Company Limited
• Inventors: Lee, Seung Min, Cho, Jung Young, Seo, Jung Wook, Park, Doo Ho
• Primary Examiner(s): Handville, Brian
• Application Number:
  US15/133,503
• Publication Number:
  US 20160345473A1
• Time in Patent Office: 1,427 Days
• CPC Class Codes: H01F 2003/106 Magnetic circuits using combinations of different magnetic materials
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/70 specially adapted for specific purposes
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H05K 9/0081 Electromagnetic shielding materials, e.g. EMI, RFI shielding H05K9/0003 takes precedence

Abstract

A magnetic sheet for a communications module includes a magnetic material. The magnetic sheet includes crushed cracks in a first region and a second region disposed adjacent to the first region. Degrees of crushed cracks are different in the first region and the second region.

Claims

1. A magnetic sheet for a communications module comprising a magnetic material,

wherein the magnetic sheet is made of a metal ribbon sheet and includes crushed cracks in first and second regions of the magnetic sheet,

the first and second regions have different magnetic permeabilities, by having different degrees of crushed cracks in the first region and the second region,

the second region surrounds the first region, and

the crushed cracks has a structure protruding from a surface of the magnetic sheet and has an inclination angle with respect to the surface.

2. The magnetic sheet for a communications module of claim 1, wherein the magnetic sheet further includes a third region disposed between the first region and the second region and having a degree of crushed cracks different from those of the first and second regions.

3. The magnetic sheet for a communications module of claim 1, wherein an average height of the crushed cracks in the first region from the surface of the magnetic sheet is different from an average height of the crushed cracks in the second region from the surface of the magnetic sheet.

4. The magnetic sheet for a communications module of claim 1, wherein

an average inclination angle of the crushed cracks in the first region with respect to the surface of the magnetic sheet is different from an average inclination angle of the crushed cracks in the second region with respect to the surface of the magnetic sheet.

5. The magnetic sheet for a communications module of claim 1, wherein when an imaginary circle having a specific size is drawn on the crushed cracks, a average number of contact points between the crushed cracks and the imaginary circle is different in the first region and the second region.

6. The magnetic sheet for a communications module of claim 1, wherein the magnetic sheet is a single continuous sheet made of a same magnetic material.

16. The magnetic sheet for a communications module of claim 1, wherein

the magnetic sheet further includes a third region having a degree of crushed cracks different from those of the first and second regions, and

the third region surrounds the first region, and the second region surrounds the third region.

17. The magnetic sheet for a communications module of claim 1, wherein

a degree of crushed cracks of the second region surrounding the first region corresponds to operating frequencies of a near field communications, and

a degree of crushed cracks of the first region surrounded by the second region corresponds to operating frequencies of a wireless power charging.

7. A magnetic sheet for a communications module comprising a magnetic material,

wherein the magnetic sheet is made of a metal ribbon sheet and includes a wireless power charging (WPC) shield and a near field communications (NFC) shield disposed adjacent to the WPC shield,

the WPC shield and the NFC shield have different magnetic permeabilities, by having different degrees of crushed cracks in the WPC shield and the NFC shield, the NFC shield surrounds the WPC shield, and

the crushed cracks has a structure protruding from a surface of the magnetic sheet and has an inclination angle with respect to the surface.

8. The magnetic sheet for a communications module of claim 7, wherein the magnetic sheet further includes a magnetic secure transmission (MST) shield having a different degree of crushed cracks from those of the WPC shield and the NFC shield.

9. The magnetic sheet for a communications module of claim 7, wherein an average height of the crushed cracks in the WPC shield from the surface of the magnetic shield is different from an average height of the crushed cracks in the NFC shield from the surface of the magnetic shield or an average inclination angle of the crushed cracks in the WPC shield from the surface of the magnetic shield is different from an average inclination angle of the crushed cracks in the NFC shield from the surface of the magnetic shield.

10. The magnetic sheet for a communications module of claim 7, wherein when an imaginary circle having a specific size is drawn on the crushed cracks, a average number of contact points between the crushed cracks and the imaginary circle is different from those in the WPC shield and the NFC shield.

11. The magnetic sheet for a communications module of claim 7, wherein the magnetic sheet is a single continuous sheet made of a same magnetic material.

15. The magnetic sheet for a communications module of claim 7, wherein

the magnetic sheet further includes a magnetic secure transmission (MST) shield having a different degree of crushed cracks from those of the WPC shield and the NFC shield, and

the MST shield surrounds the WPC shield, and the NFC surrounds the MST shield.

18. The magnetic sheet for a communications module of claim 7, wherein

a degree of crushed cracks of a near field communications shield surrounding a wireless power charging shield corresponds to operating frequencies of a near field communications, and

a degree of crushed cracks of a wireless power charging shield surrounded by a near field communications shield corresponds to operating frequencies of a wireless power charging.

12. A magnetic sheet for a communications module, comprising:

a magnetic material; and

cracks in first to third regions in the magnetic sheet,

wherein the first to third regions of the magnetic sheet are formed of a same magnetic material and have different magnetic characteristics,

the third region surrounds the first region, and the second region surrounds the third region, and

the cracks has a structure protruding from a surface of the magnetic sheet and has an inclination angle with respect to the surface.

13. The magnetic sheet for a communications module of claim 12, wherein

one of an average height from the surface of the magnetic sheet, an average inclination angle with respect to the surface of the magnetic sheet, and density of the cracks in one of the first to third regions is different from a corresponding value of the cracks in another of the first to third regions.

14. The magnetic sheet for a communications module of claim 12, wherein the magnetic sheet is a single continuous sheet made of a same magnetic material.

19. The magnetic sheet for a communications module of claim 12, wherein

a degree of crushed cracks of the third region surrounding the first region corresponds to operating frequencies of a magnetic secure transmission,

a degree of crushed cracks of the second region surrounding the third region corresponds to operating frequencies of a near field communications, and

a degree of crushed cracks of the first region surrounded by the second region corresponds to operating frequencies of a wireless power charging.