Preparation method of electromagnetic shielding film

A technology of electromagnetic shielding film and metal shielding layer, which is applied in the fields of magnetic field/electric field shielding, crosstalk/noise/electromagnetic interference reduction (, printed circuit manufacturing, etc.) The effect of improving electromagnetic shielding performance, increasing thickness, and improving electromagnetic shielding effect

Active Publication Date: 2019-11-15
SHENZHEN KNQ SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of electromagnetic shielding film, aiming to solve the problem of poor shielding effectiveness and poor conductivity of existing electromagnetic shielding film on high-frequency circuit boards

Method used

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preparation example Construction

[0016] The embodiment of the present invention provides a method for preparing an electromagnetic shielding film, comprising the following steps:

[0017] S01. Provide a carrier film layer, and prepare an insulating layer on the carrier film layer;

[0018] S02. Carry out conductive treatment to the insulating layer by means of vacuum plating;

[0019] S03. Place the conductively treated insulating layer substrate in an alkaline electrolyte, and perform at least three electroplating depositions on the surface of the conductive substrate by using an alkaline solution precipitation method to prepare a metal shielding layer;

[0020] S04. placing the metal shielding layer in a micro-etching solution, performing micro-etching on the surface to obtain a micro-etching layer;

[0021] S05. placing the metal shielding layer after the microetching treatment in an acidic electrolyte, and performing at least one acid solution settlement treatment to prepare a foamed metal layer;

[002...

Embodiment 1

[0051] A method for preparing an electromagnetic shielding film, comprising the following steps:

[0052] S11. Provide a base film with a thickness of 15 μm to 200 μm, evenly coat the surface of the base film with a silicone oil release agent or a silicone-free release agent of 0.1 μm to 30 μm, cure with UV, and then bake and cure at 50°C to 180°C Form a carrier film with a release layer; evenly coat modified epoxy resin glue or high-temperature resistant ink with a thickness of 1 μm to 50 μm on the carrier film layer, bake and cure at 50°C to 180°C to form an insulating layer.

[0053] S12. Conducting conductive treatment on the insulating layer by means of vacuum plating.

[0054] S13. placing the conductively treated substrate in an alkaline electrolyte, and performing at least three electroplating depositions on the surface of the conductive layer by using an alkaline solution deposition method to obtain a semi-finished metal layer;

[0055] S14. placing the alkali-treate...

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Abstract

The invention provides a method for preparing an electromagnetic shielding film, comprising the following steps: providing a carrier film layer, and preparing an insulating layer on the carrier film layer; conducting conductive treatment on the insulating layer by vacuum plating; The conductive insulating layer substrate is placed in an alkaline electrolyte, and the conductive substrate surface is electroplated and deposited at least three times by an alkaline solution precipitation method to prepare a metal shielding layer; the metal shielding layer is placed in a microetching solution, Micro-etching the surface to obtain a micro-etching layer; placing the metal shielding layer after micro-etching treatment in an acid electrolyte, and performing at least one acid solution precipitation treatment to prepare a foamed metal layer; in the foamed metal layer A conductive adhesive layer and a protective film layer are sequentially prepared on the surface to obtain an electromagnetic shielding film.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding films, in particular to a preparation method of electromagnetic shielding films. Background technique [0002] With the rapid development of the modern electronics industry, a large number of electrical appliances and electronic equipment are widely used in industrial production and people's daily life, which promotes the development of industrial technology, improves people's lives, and improves people's quality of life. However, electrical appliances and electronic equipment will radiate a large amount of electromagnetic waves during use, and electromagnetic waves have caused non-negligible harm to the normal and safe operation of electronic equipment and the living environment of human beings. With the rapid increase in the number of various wireless communication systems and high-frequency electronic devices, electromagnetic interference phenomena and electromagnetic pollutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0088H05K9/0086H05K1/0218H05K3/281H05K9/0096H05K2201/0195
Inventor 宋龙峰李克贵陈耀
Owner SHENZHEN KNQ SCI & TECH CO LTD
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