Anti-electromagnetic interference multilayer composite material and method for producing the same

A multi-layer composite material, anti-electromagnetic interference technology, applied in the direction of electrical components, instrument parts, magnetic field/electric field shielding, etc., can solve the problems of poor electromagnetic shielding effect and high resistivity, and achieve strong electromagnetic shielding force and resistance The effect of small rate and low production cost

Inactive Publication Date: 2008-05-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing composite multilayer film with high resistivity and poor electromagnetic shielding effect, and to provide a multil

Method used

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  • Anti-electromagnetic interference multilayer composite material and method for producing the same
  • Anti-electromagnetic interference multilayer composite material and method for producing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0024] This embodiment is used to illustrate the anti-electromagnetic interference multilayer composite material and its preparation method provided by the present invention.

[0025]First, the surface of the polycarbonate plastic block used as the plastic substrate is cleaned, and then a layer of UV paint is sprayed on a specific area that needs electromagnetic shielding, and the thickness of the coating is 10 microns to obtain the substrate. Then put the substrate into the magnetron sputtering vacuum chamber equipped with stainless steel target and copper target, in the DC magnetron sputtering mode, adopt the JP-900A DC magnetron sputtering system produced by Beijing Beiyi Innovation Vacuum Technology Co., Ltd. Perform sputtering. Firstly, the substrate surface was cleaned with argon plasma, the sputtering power of the plasma was 4000 watts, and the sputtering cleaning time was 3 minutes. Afterwards, the sputter plating of the metal layer begins. Set the rotational speed o...

Embodiment 2

[0027] The anti-electromagnetic interference multilayer composite material was prepared according to the method described in Example 1, except that the stainless steel target was replaced by a chromium target, and the sputtering power was 10,000 watts to obtain the anti-electromagnetic interference multilayer composite material provided by the present invention.

Embodiment 3

[0029] This embodiment is used to illustrate the anti-electromagnetic interference multilayer composite material and its preparation method provided by the present invention.

[0030] According to the method described in embodiment 1, the multi-layer composite material of anti-electromagnetic interference is prepared, and the difference is that the silver target is replaced by a copper target, the sputtering power is 6000 watts, and the sputtering time is 10 minutes, and the anti-electromagnetic interference provided by the invention is obtained. Interfering multilayer composites, the thickness of the copper layer is 0.7 μm.

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Abstract

The present invention provides an anti electromagnetic interference multilayer composite materials, which comprises a plastic basement and a metal layer loaded on the plastic basement. The metal layer comprises at least three layers which are a first metal layer, a second metal layer and a third metal layer in turn from inside to outside. The first metal layer and the third metal layer are all formed by one of stainless steel, chrome and nickel. The second metal layer is formed by one of argentums, cuprum and aluminum. The multilayer composite materials provided by the present invention has a small resistivity with a resistance less than two ohm in the largest distance in an area, strong electromagnetism shielding capacity (the electromagnetism shielding capacity reaches up to 10 to 50 Debye), strong corrosion resistance and good combining power to the plastic basement. Even under the effect of brine corrosion, the metal layer in particular to the second metal layer is still firmly attached to the plastic basement. In addition, the metals forming the metal layer of the present invention are all routine and not expensive metals, so the cost of production is relatively low.

Description

technical field [0001] The invention relates to a multilayer composite material, in particular to a multilayer composite material for preventing electromagnetic interference and a preparation method thereof. Background technique [0002] With the increasingly widespread application of electronic circuits and electronic technologies in the fields of home, industry, transportation, and national defense, Electromagnetic Interference (EMI) pervades every corner of human life and has gradually become a major pollution of human living environment. Long-term exposure to strong electromagnetic fields can cause cancerous lesions in the human body. For this reason, many countries have formulated relevant policies on anti-electromagnetic interference. At present, whether many electronic devices and systems can be widely used in the market depends to a large extent on the anti-electromagnetic interference level of the electronic devices and systems themselves. [0003] Shielding is one...

Claims

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Application Information

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IPC IPC(8): H05K9/00G12B17/02
Inventor 陈晓梅程晓峰钟源宫清
Owner BYD CO LTD
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