Magnetic shielding sheet and manufacturing method thereof

• US 9,730,369 B2
• Filed: 02/12/2016
• Issued: 08/08/2017
• Est. Priority Date: 02/16/2015
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Hyun Ho, Kwon, Jong Hwa, Kwak, Sang il
• Primary Examiner(s): McAllister, Michael F
• Application Number:
  US15/042,722
• Publication Number:
  US 20160242332A1
• Time in Patent Office: 543 Days
• CPC Class Codes: H05K 9/0075 Magnetic shielding materials

Abstract

Provided is a magnetic shielding sheet. The magnetic shielding sheet according to an embodiment of the inventive concept may include a magnetic sheet including a magnetic material, a plurality of first metal strips provided on the magnetic sheet in a first direction, and a plurality of second metal strips provided on the magnetic sheet in a second direction different from the first direction. According to the inventive concept, a magnetic field applied from the outside may be efficiently shielded by properly arranging the metal strips on the magnetic sheet.

Claims

1. A magnetic shielding sheet comprising:

a magnetic sheet including a magnetic material;

a plurality of first metal strips extending on the magnetic sheet in a first non-zigzag straight line direction; and

a plurality of second metal strips extending on the magnetic sheet in a second non-zigzag straight line direction different from the first direction,

wherein each first metal strip and each second metal strip are without apertures therein.

2. The magnetic shielding sheet of claim 1, wherein the plurality of first metal strips and the plurality of second metal strips are provided in a plurality of holes or grooves formed in a first surface of the magnetic sheet.

3. The magnetic shielding sheet of claim 2, wherein the plurality of holes or grooves is formed by at least one of laser machining, punching, pressing, cutting, dry etching, or wet etching.

4. The magnetic shielding sheet of claim 3, wherein the plurality of first metal strips and the plurality of second metal strips are provided by a deposition method.

5. The magnetic shielding sheet of claim 4, wherein the plurality of first metal strips and the plurality of second metal strips are simultaneously provided.

6. The magnetic shielding sheet of claim 2, wherein cross sections of the plurality of first metal strips and the plurality of second metal strips are rectangular, triangular, or semicircular.

7. The magnetic shielding sheet of claim 1, wherein the first non-zigzag straight line direction and the second non-zigzag straight line direction are perpendicular to each other.

8. The magnetic shielding sheet of claim 6, wherein the two adjacent first metal strips and the two adjacent second metal strips are disposed at a same interval from one another.

9. The magnetic shielding sheet of claim 1, wherein the magnetic material comprises at least one of a ferrite-based material, a neodymium-based material, a samarium-based material, an alnico-based material, sendust, or permalloy.

10. The magnetic shielding sheet of claim 9, wherein the plurality of first metal strips and the plurality of second metal strips comprise at least one of copper, aluminum, or iron.