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Composite electromagnetic screen film material and mfg. method thereof

A shielding material, composite electromagnetic technology, applied in the fields of magnetic/electric field shielding, shielding, electrical components, etc., can solve the problems of single variety, narrow shielding frequency band, cannot shield wide frequency band at the same time, etc., and achieve the effect of low cost

Inactive Publication Date: 2006-06-14
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common problem of existing electromagnetic shielding materials is that they are single in variety, narrow in shielding frequency band, and cannot simultaneously shield the wideband interference from low frequency to high frequency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Prepare a kind of composite electromagnetic shielding material that contains two layers of metal film layers according to the manufacturing method of the present invention, wherein the soft magnetic material layer is selected nickel-iron alloy, and composition is Ni80Fe20, i.e. traditional permalloy composition, and conductive metal layer is selected For metallic copper.

[0052] The composition of the nickel-iron alloy electrolyte used is: NiSO 4 .6H 2 O 180g / L, NiCl / 6H 2 O 40g / L, FeSO 4 .7H 2 O 15g / L, H 3 BO 3 40g / L, saccharin 4g / L, sodium benzenesulfinate 0.4g / L, sodium lauryl sulfate 3.2g / L, FK285C 40g / L, FK287A 5ml / L, FK287B 5ml / L, FK370 6ml / L.

[0053] Composition of copper metal electrolyte used: CuSO 4 ·5H 2 O 200g / L, H 2 SO 4 70g / L, glucose 40g / L.

[0054] The plating solution is filtered in three stages, that is, it is first filtered through a filter, then filtered through a pp filter element with a pore size of 10-20 μm, and finally filtered thro...

Embodiment 2

[0061] According to the manufacturing method of the present invention, a composite electromagnetic shielding material containing three layers of metal film layers is prepared, that is, a soft magnetic material layer-conductive metal layer-soft magnetic material layer, wherein the soft magnetic material layer is selected from two nickel-iron alloys , the components are respectively Ni35Fe65 and Ni50Fe50, and the conductive metal layer is selected as metal copper.

[0062] The composition of the nickel-iron alloy electrolyte used is: NiSO 4 .6H 2 O 100g / L, NiCl / 6H 2 O 65g / L, FeSO 4 .7H 2 O 32g / L, H 3 BO 3 55g / L, saccharin 3g / L, sodium benzenesulfinate 0.2g / L, sodium lauryl sulfate 0.3g / L, FK285C 26g / L, FK287A 3ml / L, FK287B 3.8ml / L, FK370 4.5ml / L,

[0063] Composition of copper metal electrolyte used: CuSo 4 .5H 2 O 160g / L, H 2 SO 4 40g / L, glucose 20g / L.

[0064] The plating solution is filtered in three stages, that is, it is first filtered through a filter, then ...

Embodiment 3

[0075] According to the manufacturing method described in the present invention, a kind of composite electromagnetic shielding material containing three metal thin film layers has been prepared, i.e. metal iron Fe soft magnetic material layer-copper conductive metal layer-iron-cobalt alloy Fe50Co50 soft magnetic material layer,

[0076] The components of the metal iron electrolyte used are: FeSO 4 .6H 2 O 130g / L, NaCl 53g / L, H 3 BO 3 45g / L, Sodium Citrate 50g / L, Saccharin 3g / L, Sodium Benzenesulfinate 0.3g / L, Sodium Lauryl Sulfate 0.2g / L

[0077] Composition of copper metal electrolyte used: CuSO 4 ·5H 2 O 180g / L, H 2 SO 4 45g / L, glucose 25g / L.

[0078] The plating solution is filtered in three stages, that is, it is first filtered through a filter, then filtered through a pp filter element with a pore size of 10-20 μm, and finally filtered through an activated carbon filter element.

[0079] The cathode is made of corrosion-resistant titanium plate, which is polishe...

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Abstract

The invention belongs to the field of magnetic material, relating to an electromagnetic shielding material and the making method thereof. The invention is a composite metallic film formed on a conductive substrate by multiple deposition in the water solution, and the obtained composite metallic film is 1-100 mum thick, and each layer of the composite metallic film is 1.1-99.9 mum thick, and the combination between the layers of the composite film is by chemical bond, and each layer is layered. The substrate can be stainless steel, copper plate, Ti plate, Al plate or one of the corrosion-resistant alloy plates, and also made of conductive glass, conductive plastics, polymer high molecular material, or other material; the composite metallic film comprises two or above different metallic film layers; each metallic film layer can be of copper, iron, iron-nickel alloy, nickel-cobalt alloy, iron-cobalt alloy or iron-cobalt-nickel alloy. The invention can shield the frequencies between 50Hz and 100 Hz and the shielding efficacy reaches above 70dB.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to an electromagnetic shielding material and a manufacturing method thereof. Background technique: [0002] Electromagnetic shielding is a measure that uses a shield to prevent electromagnetic waves from propagating in space or to prevent electromagnetic waves from entering the protected space. The shielding body acts as a barrier and is described by shielding effectiveness. Electromagnetic interference is usually divided into two categories, namely conducted interference and radiated interference. Filtering, shielding and grounding are the three major technologies for suppressing electromagnetic interference, and the former two require soft magnetic materials with excellent performance. Filtering is mainly used to suppress conducted interference, including common-mode and differential-mode interference. It is usually necessary to use soft magnetic materials with excellent high-freq...

Claims

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Application Information

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IPC IPC(8): G12B17/02H05K9/00
Inventor 刘天成李德仁孙克韩伟卢志超周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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