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Electromagnetic protection film with efficient shielding and electromagnetism absorption function

An electromagnetic absorption layer and protective film technology, applied in the fields of magnetic field/electric field shielding, electrical components, chemical instruments and methods, etc., can solve the problems of electromagnetic signal absorption, poor operation status of equipment, affecting the accurate operation of precision instruments, etc., and achieve high shielding. Effectiveness, good anti-interference and protective effect

Active Publication Date: 2014-03-05
BAODING LUCKY INNOVATIVE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The shielding films of the above three structures either rely on the reflection of the metal layer to achieve high shielding effectiveness, or the isotropic conductive adhesive layer shields electromagnetic waves, but none of them can absorb a small amount of electromagnetic signals passing through the shielding film, so it will affect Accurate operation of precision instruments, resulting in poor operating conditions of equipment

Method used

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  • Electromagnetic protection film with efficient shielding and electromagnetism absorption function
  • Electromagnetic protection film with efficient shielding and electromagnetism absorption function
  • Electromagnetic protection film with efficient shielding and electromagnetism absorption function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of coating liquid for conductive electromagnetic absorption layer 6:

[0042] Silver-coated copper powder with 10% silver content 20 g

[0043] Phosphate carbonyl iron powder LDT-20 (Shaanxi Xinghua Chemical Co., Ltd.) 20 grams

[0044] Epoxy general resin E-20 60g

[0045] Add the above-mentioned substances into the container and stir at high speed to obtain the coating liquid for use.

[0046] 2. Preparation of electromagnetic protective film

[0047] Coat the fluorine-modified amino resin release layer 2 on the 50um PET carrier film 1. After curing, coat the coating liquid composed of epoxy-modified polyurethane resin and carbon black filler on the surface of the release layer to form a thickness of 5um barrier edge layer 3; on the surface of the barrier edge layer, a silver-plated layer 4 with a thickness of 0.1um is vacuum evaporated, and the conductive electromagnetic absorption layer coating solution configured above is coated on the surface of t...

Embodiment 2

[0049] 1. Preparation of coating liquid for conductive electromagnetic absorption layer 6:

[0050] 30g copper powder

[0051] Phosphate carbonyl iron powder LDT-20 (Shaanxi Xinghua Chemical Co., Ltd.) 20 grams

[0052] No. 800 polyester resin 50 g

[0053] Add the above-mentioned substances into the container and stir at high speed to obtain the coating liquid for use.

[0054] 2. Preparation of electromagnetic protective film

[0055] Coat the fluorine-modified amino resin release layer 2 on the 50um PET carrier film 1. After curing, coat the coating solution composed of epoxy-modified polyurethane resin and carbon black filler on the surface of the release layer to form a thickness 4um barrier edge layer 3; on the surface of the barrier edge layer, a silver-plated layer 4 with a thickness of 0.25um is vacuum-evaporated, and a copper-plated layer 5 with a thickness of 0.25um is vacuum-evaporated on the surface of the silver-plated layer, and coated on the surface of the co...

Embodiment 3

[0057] 1. Preparation of coating liquid for conductive electromagnetic absorption layer 6:

[0058] 30 grams of silver powder

[0059] EW Carbonyl Iron Powder (BASF Company) 20g

[0060] Epoxy general resin E-20 50g

[0061] Add the above-mentioned substances into the container and stir at high speed to obtain the coating liquid for use.

[0062] 2. Preparation of electromagnetic protective film

[0063] Coat the fluorine-modified amino resin release layer 2 on the 50um PET carrier film 1. After curing, coat the coating solution composed of epoxy-modified polyurethane resin and carbon black filler on the surface of the release layer to form a thickness The barrier layer 3 is 5.5um, the silver plating layer 4 with a thickness of 0.2um is vacuum evaporated on the surface of the barrier layer, and the conductive electromagnetic absorption layer coating solution configured above is coated on the surface of the copper plating layer to form a conductive layer with a thickness of 1...

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Abstract

Provided is electromagnetic protection film with the efficient shielding and electromagnetism absorption function. According to the electromagnetic protection film with the efficient shielding and electromagnetism absorption function, a release layer is arranged on the surface of a base material, a barrier insulating layer is arranged on the surface of the release layer, at least one metal layer is arranged on the surface of the barrier insulating layer, and at least one conductive electromagnetism absorption layer is arranged on the surface of the metal layer. The electromagnetic protection film with the efficient shielding and electromagnetism absorption function has the excellent capacity of shielding and reflecting an electromagnetic wave signal, can effectively absorb transmitted electromagnetic wave signals, can carry out comprehensive electromagnetism protection, and can be widely applied to portions, such as FPCs and hard PCBs, of mobile phones, cameras, medical apparatuses and instruments, notebook computers and the like, wherein the FPCs, the hard PCBs and the like need electromagnetism protection.

Description

Technical field [0001] The invention relates to the field of shielding films for electronic circuit packaging, in particular to an electromagnetic protective film with high-efficiency shielding and electromagnetic absorption. Background technique [0002] In view of the increasingly serious external electromagnetic pollution caused by wireless electromagnetic waves, mobile phones, various electric sparks, lightning, abnormal solar activities, etc., as well as the high frequency in high-frequency equipment, controllable circuits, and communication systems, and the internal caused by high-speed driving The problem of electromagnetic pollution is becoming more and more serious, and electromagnetic shielding and absorption have become necessary means to prevent electromagnetic pollution. [0003] Among them, the microprocessors of precision instruments such as mobile phones, notebooks, digital cameras, medical equipment, etc. require certain electromagnetic protection methods. Among th...

Claims

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Application Information

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IPC IPC(8): H05K9/00B32B15/04
Inventor 季青健刘彦峰
Owner BAODING LUCKY INNOVATIVE MATERIALS
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