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Composite magnetic conductive sheet for wireless charging and near-field communication and preparation method thereof

A technology of wireless charging and magnetic conductive sheet, applied in chemical instruments and methods, inductance/transformer/magnet manufacturing, circuits, etc., can solve the problem of short card reading distance of NFC antenna, improve reading and writing distance, avoid moisture or corrosion , the effect of improving charging efficiency

Active Publication Date: 2017-06-13
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the flexible sheet made of flat soft magnetic powder and resin material is used to solve the magnetic conduction problem of NFC near-field communication antenna. On the one hand, it solves the problem of interface impedance at high frequencies. The high magnetic permeability of the belt solves the problem of short reading distance of the NFC antenna

Method used

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  • Composite magnetic conductive sheet for wireless charging and near-field communication and preparation method thereof
  • Composite magnetic conductive sheet for wireless charging and near-field communication and preparation method thereof
  • Composite magnetic conductive sheet for wireless charging and near-field communication and preparation method thereof

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preparation example Construction

[0052] The preparation method of above-mentioned composite magnetic permeable sheet comprises the following steps:

[0053] The composite flake manufacturing steps of soft magnetic powder and resin material synthesis, which specifically include: flattening the soft magnetic powder by ball milling, sieving and heat treating the flattened powder, mixing with resin after heat treatment to prepare slurry, and then passing horizontal coating The method of cloth is evenly coated on the surface of the release film, and the flat powder is uniformly oriented after continuous drying, and is arranged parallel to the film surface of the substrate release film to ensure the highest real part of the magnetic permeability and the lowest magnetic permeability. The imaginary part has the smallest loss, and finally it is cut according to the required size to obtain a composite sheet composed of soft magnetic powder and resin material.

[0054]In the above steps of making the composite sheet, th...

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Abstract

The invention discloses a compound magnetic conductive plate used for wireless charging and near field interference resistance and a preparation method thereof. The compound magnetic conductive plate comprises a top-layer material, a middle-layer material and a lowest-layer material, wherein the top-layer material and the lowest-layer material are both compound slices compounded by soft magnetic powder and resin materials; the middle-layer material is a combination body of at least one layer of magnetic metal slice or a compound slice combined by a magnetic metal slice and the soft magnetic powder and the resin material, wherein one surface or two surfaces of the magnetic metal slice are adhered with double faced adhesive tape; the top-layer material, the middle-layer material and the lowest-layer material are subjected to one-time forming after being subjected to hot pressing. When an NFC (Near Field Communication) function is carried out, enough permeability is provided so as to guarantee an enough communication distance and meet NFC requirements; meanwhile, the NFC function can be prevented from disturbing other processors. Correspondingly, other processors can be prevented from distributing an NFC antenna.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a composite magnetic-conductive sheet material for wireless charging and near-field anti-electromagnetic interference and a method for preparing the material, wherein the composite magnetic-conductive sheet material can be used as a wireless charging (Wireless Power Charging (abbreviated as WPC) magnetic material for the magnetic conduction of the induction coil at the transmitting end and the receiving end, and can also be used as a magnetic material for near-field anti-electromagnetic interference and near-field communication (Near Field Communication, abbreviated as NFC), especially for portable terminals And other equipment, while satisfying the dual functions of wireless charging and NFC antenna magnetic conduction, in addition, it also has the function of anti-electromagnetic interference. Background technique [0002] With the development of mobile digital elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147B32B15/092H01F41/02
Inventor 刘天成卢志超王湘粤朱景森刘志坚关连宝李德仁
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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