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Electromagnetic field shielding case

A shielding cover and electromagnetic field technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of large eddy current loss of resistance and inconspicuous shielding effect, and achieve reduction of eddy current loss, good controllability, and control of magnetic permeability rate effect

Inactive Publication Date: 2015-07-01
金基范
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, due to the relatively low resistance and relatively large eddy current loss of this material, the shielding effect of electromagnetic fields at higher frequencies is not obvious

Method used

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  • Electromagnetic field shielding case
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Embodiment Construction

[0016] The specific implementation will be described in detail below in conjunction with the accompanying drawings: Figure 1 to Figure 4 The illustrations show various embodiments of the invention. In the figure, an electromagnetic field shielding cover is composed of a base material 1 and a shielding layer 2 bonded to the base material; the base material 1 is an adhesive tape or a shielding tape, and the shielding layer 2 is a sheet metal soft magnetic The metal soft magnetic layer has a magnetic permeability of 5000Hz to 150,000Hz. The metal soft magnetic layer includes a number of unit grids 3, and the adjacent sides of each unit grid and its adjacent unit grids match each other, and the gap between adjacent sides is 0.001 ~5 microns, and the area of ​​each unit grid is 0.10 square millimeters to 2 square millimeters. The cells can be arranged in an orderly manner, such as figure 1 ; It can also be an unordered arrangement. Whether it is an ordered or disordered arrange...

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PUM

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Abstract

The invention relates to an electromagnetic field shielding case. The shielding case consists of a substrate and a shielding layer bonded on the substrate, wherein the substrate is a bonding adhesive tape or a shielding adhesive tape; the shielding layer is a flaky metal soft magnetic layer; the magnetic conductivity of the metal soft magnetic layer is 5,000Hz-150,000Hz; the metal soft magnetic layer comprises a plurality of unit grids; adjacent edges of each unit grid and adjacent unit grids of each unit grid are matched with each other; the gaps between adjacent edges is 0.001-5 micrometers; and the area of each unit grid is 0.10mm<2> to 2mm<2>. The electromagnetic field shielding case has the advantages that the eddy current loss of high-frequency electromagnetic waves can be effectively reduced after the metal soft magnetic layer shielding case is partitioned according to a certain size, so that a section of high-frequency-band electromagnetic waves has a better shielding effect. Meanwhile, high controllability is achieved, namely, the magnetic conductivity of a metal soft magnetic material can be further controlled by adjusting the sizes of the cut unit grids.

Description

technical field [0001] The invention relates to a structural part or casing of an electric device, more specifically to an electromagnetic field shielding cover. Background technique [0002] Many electronic devices use alternating magnetic fields to transmit signals and energy. Strong magnetic fields may appear around this device. These magnetic fields are harmful to the human body, and at the same time, induce currents, resulting in malfunctions of equipment. Therefore, magnetic field shielding materials need to be used on electronic equipment. The magnetic field causes an induced current inside the shielding material to lose magnetic energy and weaken the magnetic field strength of the shielding body. Therefore, the magnetic field shielding material generally adopts a metal soft magnetic material with high magnetic permeability and high saturation magnetic induction intensity, which has an obvious effect in eliminating low-frequency electromagnetic field shielding. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
Inventor 金基范
Owner 金基范
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