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Electromagnetic wave absorbing composite board

An electromagnetic wave, composite board technology, applied in electrical components, magnetic/electric field shielding, standard size structure, etc., can solve the problem of frequency range conversion without electromagnetic wave absorption ability

Active Publication Date: 2021-10-29
加川清二 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This electromagnetic wave absorbing composite panel has a high absorbing ability for electromagnetic wave noise in a wide frequency range, but it does not have a function to exhibit a particularly large absorbing ability for electromagnetic wave noise in a specific frequency range, and there is no frequency range conversion that maximizes the electromagnetic wave absorbing ability. function of

Method used

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Examples

Experimental program
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Effect test

reference example 1

[0164] Use has as Figure 5 The device of the shown structure, this device comprises the pattern roller 232a, 232b that has the electroplating fine diamond particle that particle size distribution is 50 μ m-80 μ m, is formed in the aluminum film that thickness is 0.05 μ m with 90 ° intersection angle θs in two directions Oriented linear scratches were formed on the surface of a biaxially oriented polyethylene terephthalate (PET) film with a thickness of 16 μm by vacuum vapor deposition. Optical micrographs of a linearly scratched aluminum film show that the linear scratches have the following characteristics:

[0165] The range of width W: 0.5μm-5μm,

[0166] Average width Wav: 2μm,

[0167] Range of interval I: 2μm-30μm,

[0168] Average interval Iav: 20μm,

[0169] Average length Lsav: 5mm, and

[0170] Cross angle θs: 90°.

reference example 2

[0172] Using the device with the structure shown in Figure 3, the device includes patterned rollers 202a, 202b with electroplated fine diamond particles with a particle size distribution of 50 μm-80 μm, forming a cross angle θs of 60° in an aluminum film with a thickness of 0.05 μm. Linear scratches oriented in two directions, the aluminum film was formed on the surface of a PET film with a thickness of 16 μm by vacuum vapor deposition. Optical micrographs of a linearly scratched aluminum film show that the linear scratches have the following characteristics:

[0173] The range of width W: 0.5μm-5μm,

[0174] Average width Wav: 2μm,

[0175] Range of interval I: 2μm-30μm,

[0176] Average interval Iav: 20μm,

[0177] Average length Lsav: 5mm, and

[0178] Cross angle θs: 60°.

reference example 3

[0180] By the same method as in Reference Example 2, an aluminum thin film having a thickness of 0.05 μm formed by vacuum vapor deposition on the surface of a PET film having a thickness of 16 μm was provided in two directions at a crossing angle θs of 45°. Linear scratches, the difference is that the intersection angle θs is changed to 45° to prepare an electromagnetic wave absorbing film.

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Abstract

An electromagnetic wave absorbing composite board, which includes an electromagnetic wave shielding film laminated on the electromagnetic wave absorbing film; the electromagnetic wave absorbing film includes a single-layer or multi-layer metal film formed on the surface of a plastic film; the metal film has multiple a large number (multiple) of substantially parallel discontinuous linear scratches with irregular width and spacing in three directions; the electromagnetic wave shielding film is a conductive metal foil, a plastic film with a conductive metal film or coating, or a carbon plate; and The area ratio of the electromagnetic wave shielding film to the electromagnetic wave absorbing film is 10-80%.

Description

technical field [0001] The present invention relates to an electromagnetic wave absorbing composite panel which has a high absorbing capability for electromagnetic wave noise in a desired frequency range and which is capable of switching the frequency range for maximizing the absorbing capability for electromagnetic wave noise. Background technique [0002] Electrical and electronic appliances emit electromagnetic wave noise, and ambient electromagnetic wave noise invades them to make the signal contain noise. In order to prevent the emission and intrusion of electromagnetic wave noise, electrical appliances and electronic appliances are usually shielded with metal plates. It has also been proposed to provide an electromagnetic wave absorbing film in electric and electronic appliances to absorb electromagnetic wave noise. [0003] For example, WO 2010 / 093027 A1 discloses a metal thin film-plastic composite film with reduced anisotropy in electromagnetic wave absorbing abili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08H05K9/00
CPCB32B15/08B32B2255/06B32B2255/10B32B2255/20B32B2307/212H05K9/0086H05K9/0088H05K9/0084H05K9/0062H05K9/0069
Inventor 加川清二
Owner 加川清二
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