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Shielding film for wireless charging and preparation method and manufacturing equipment thereof

A technology for wireless charging and manufacturing equipment, applied in electrical components, circuit devices, vacuum evaporation coating, etc., can solve the problems of low saturation magnetic induction intensity, low electromagnetic induction coupling efficiency, maximum output power, and small upper limit of charging speed, etc. The effect of high saturation magnetic induction intensity and resonance frequency, improving wireless charging power, and improving magnetic coupling efficiency

Pending Publication Date: 2022-05-06
SUNWAY COMM JIANGSU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of wireless charging technology, more and more electronic products have wireless charging function. At present, wireless charging is mostly realized by electromagnetic induction coupling. The principle of electromagnetic induction coupling is that the magnetic fields generated by the transmitting coil and the receiving coil interact The coupling between them realizes wireless charging, but the current wireless charging power is small and the charging time is long, which cannot meet the high-power and high-efficiency wireless charging needs of electronic products.
[0003] Most of the shielding films used in the existing wireless charging receiving end are heat-treated iron-based nanocrystalline thin strips, which have a low resonance frequency (about 10MHz), are not suitable for working at higher frequencies, and have low saturation magnetic induction. Only 1~1.3T, the electromagnetic induction coupling efficiency is low, resulting in limited electromagnetic induction coupling power, there are minor disadvantages such as maximum output power, charging speed upper limit, etc., and it is impossible to meet the requirements of high-power and fast wireless charging for electronic products

Method used

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  • Shielding film for wireless charging and preparation method and manufacturing equipment thereof
  • Shielding film for wireless charging and preparation method and manufacturing equipment thereof
  • Shielding film for wireless charging and preparation method and manufacturing equipment thereof

Examples

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Effect test

preparation example Construction

[0034] A method for preparing a shielding film for wireless charging, comprising the following steps,

[0035] Obtain single-sided adhesive, which includes sequentially stacked release film, adhesive layer and protective film;

[0036] Tear film, tear off the protective film of the single-sided adhesive tape;

[0037] Magnetron sputtering, performing magnetron sputtering on the surface of the glue layer away from the release film to form a magnetic layer on the surface of the glue layer away from the release film to obtain a shield for wireless charging film, the magnetic layer is (Fe 65 co 35 ) x (TiO 2 ) 1-x layer, wherein, x≥0.76; the saturation magnetic induction B of the magnetic layer s ≥1.7T.

[0038] As can be seen from the above description, the beneficial effect of the present invention is that the method for preparing the shielding film for wireless charging adopts magnetron sputtering and only needs one step to deposit the magnetic thin film material on the ...

Embodiment 1

[0049] Please refer to Figure 1 to Figure 5 , Embodiment 1 of the present invention is: a shielding film for wireless charging, which is applied to the receiving end of wireless charging, and is especially suitable for high-frequency working conditions.

[0050] Such as figure 1 As shown, the shielding film for wireless charging includes an adhesive layer 1 and a magnetic layer 2 formed on one surface of the adhesive layer 1 by magnetron sputtering, and the other surface of the adhesive layer 1 opposite to the magnetic layer 2 A release film 3 is provided, that is to say, among the two opposite surfaces of the adhesive layer 1 , the magnetic layer 2 is deposited on one surface, and the release film 3 is provided on the other surface. During use, the user can fix the magnetic layer 2 on the external member through the adhesive layer 1 by tearing off the release film 3 .

[0051] The magnetic layer 2 is (Fe 65 co 35 ) x (TiO 2 ) 1-x layer, wherein, x≥0.76; the saturation...

Embodiment 2

[0054] Please refer to Figure 6 , Embodiment 2 of the present invention is a preparation method for preparing the wireless charging shielding film described in Embodiment 1, comprising the following steps,

[0055] A single-sided adhesive is obtained, and the single-sided adhesive includes a release film, an adhesive layer, and a protective film stacked in sequence; in this embodiment, the width of the single-sided adhesive is 50 mm, and the thickness is 80 μm.

[0056] Tear film, tear off the protective film of the single-sided adhesive tape;

[0057] Magnetron sputtering, performing magnetron sputtering on the surface of the glue layer away from the release film to form a magnetic layer on the surface of the glue layer away from the release film to obtain a shield for wireless charging film, the magnetic layer is (Fe 65 co 35 ) x (TiO 2 ) 1-x layer, wherein, x≥0.76; the saturation magnetic induction B of the magnetic layer s ≥1.7T. It is easy to understand that in o...

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Abstract

The invention discloses a shielding film for wireless charging and a preparation method and manufacturing equipment thereof, the shielding film for wireless charging comprises an adhesive layer and a magnetic layer formed on the surface of one side of the adhesive layer through magnetron sputtering, the magnetic layer is a (Fe65Co35) x (TiO2) 1-x layer, and x is greater than or equal to 0.76; and the saturation flux density Bs of the magnetic layer is greater than or equal to 1.7 T. Compared with a traditional iron-based nanocrystalline ribbon, the shielding film for wireless charging has higher saturation magnetic induction intensity and resonance frequency, the magnetic coupling efficiency of a receiving coil of a wireless charging receiving end is improved, and therefore the wireless charging power, efficiency and speed are effectively improved.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a shielding film for wireless charging, a preparation method and manufacturing equipment thereof. Background technique [0002] With the development of wireless charging technology, more and more electronic products have wireless charging function. At present, wireless charging is mostly realized by electromagnetic induction coupling. The principle of electromagnetic induction coupling is that the magnetic fields generated by the transmitting coil and the receiving coil interact The coupling between them realizes wireless charging, but the current wireless charging power is small and the charging time is long, which cannot meet the high-power and high-efficiency wireless charging requirements of electronic products. [0003] Most of the shielding films used in the existing wireless charging receiving end are heat-treated iron-based nanocrystalline thin strips, which hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/20C23C14/35C22C38/10H02J50/10
CPCC23C14/352C23C14/205H02J50/10C22C38/10
Inventor 邹想王磊张继林董泽琳蔡鹏
Owner SUNWAY COMM JIANGSU CO LTD
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