Magnetic field shielding sheet, manufacturing method thereof, wireless power receiving module, and terminal equipment
A shielding sheet, magnetic field technology, applied in chemical instruments and methods, antennas, circuits, etc., can solve the problems of reducing the magnetic permeability of the shielding sheet, increasing the overall thickness of the magnetic field shielding sheet, etc., to achieve high magnetic permeability, lower production unit price, The effect of simplifying the manufacturing process
Active Publication Date: 2021-11-09
AMOSENSE
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Problems solved by technology
[0009] However, the more the chip-making process is repeated, the smaller the size of the fragments separated from each other is, and the total number of separated chips increases. Therefore, the more the chip-making process is repeated, the more the impedance of the shielding sheet increases, and the shielding sheet can be reduced. The effect caused by small eddy currents, but there is a problem that the magnetic permeability of the shielding sheet is reduced to below 1500
[0010] Therefore, in order to reflect the magnetic field shielding sheet having a high magnetic permeability of more than 2000 while increasing the impedance of the shielding sheet itself, there is a problem that the overall thickness of the magnetic field shielding sheet needs to be increased.
Method used
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[0053]The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art of the present invention can easily implement them. The present invention can be embodied in various forms and is not limited to the embodiments described here. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar constituent elements throughout the specification.
[0054] The magnetic field shielding sheet 100 of an embodiment of the present invention is as figure 1 and image 3 As shown, it includes a chip body 110 , a through portion 120 and a slit 130 .
[0055] The chip body 110 may be made of a magnetic material so as to shield the magnetic field generated from the antenna 211 .
[0056] Wherein, the antenna 211 may include a hollow part E having a predetermined area in the central ...
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Abstract
Provided are a magnetic field shielding sheet, a manufacturing method thereof, a wireless power receiving module and a portable terminal device thereof. A magnetic field shielding sheet according to an embodiment of the present invention, as a magnetic field shielding sheet disposed on one side of an antenna including a hollow portion having a predetermined area in a central portion and a pattern portion surrounding the hollow portion, includes: a sheet body composed of A plurality of strips of at least one or more of the amorphous alloy and the nanocrystalline alloy are formed by laminating multiple layers of multi-layer sheets with the first adhesive layer as the medium; a plurality of through parts, which are connected to the pattern part of the antenna The corresponding disposition area is formed through and formed in a line shape with a predetermined width and length; and a plurality of slits are formed in the disposition area so as to extend from the edge of the penetration portion toward the side of the sheet body. The magnetic field shielding sheet of the present invention can exhibit a high magnetic permeability of more than 2000 while having a very thin thickness.
Description
technical field [0001] The invention relates to a magnetic field shielding sheet and a manufacturing method thereof, a wireless power receiving module and a portable terminal device thereof. Background technique [0002] Near Field Communication (NFC) and wireless charging are essentially contactless transmission methods. This non-contact transmission method is embodied by an antenna that transmits or receives a magnetic field, and a magnetic field shielding sheet that is arranged on one side of the antenna to enable smooth transmission or reception of a magnetic field. [0003] Generally, as a magnetic field shielding sheet, a sheet made of a magnetic material such as an amorphous tape sheet, a ferrite material, or a polymer sheet is used. [0004] On the other hand, the magnetic field shielding sheet uses a sheet formed by separating a plurality of fragments so that loss due to eddy current can be greatly reduced or the flexibility of the sheet itself can be improved. ...
Claims
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IPC IPC(8): H01Q1/52H02J50/27B32B7/12B32B15/00B32B15/04
CPCB32B7/12B32B15/00B32B15/04H01Q1/526H02J50/27
Inventor 张吉在
Owner AMOSENSE