Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film

A technology of electromagnetic shielding film and circuit board, which is applied in the field of electronics and can solve problems such as peeling off, difficult discharge of volatiles, and grounding failure

Pending Publication Date: 2020-01-14
GUANGZHOU FANGBANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of implementing the present invention, the inventors have found that there are at least the following problems in the prior art: there are volatiles in the conductive adhesive layer under high temperature conditions, but the shielding layer is relatively dense, and the volat...

Method used

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  • Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film
  • Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film
  • Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0042] to combine Figure 1 to Figure 4 As shown, a kind of electromagnetic shielding film of the preferred embodiment of the present invention comprises shielding layer 1 and conductive adhesive layer 2, and described conductive adhesive layer 2 is arranged on described shielding layer 1; Described shielding layer 1 is close to described conductive adhesive One side of the layer 2 is a flat surface, and the shielding layer 1 is provided with a through hole 11 pene...

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Abstract

The invention relates to the technical field of electronics, and discloses an electromagnetic shielding film, a circuit board, and a preparation method of the electromagnetic shielding film. The electromagnetic shielding film comprises a shielding layer and a conductive adhesive layer. The conductive adhesive layer is arranged on the shielding layer. The surface, which is near the conductive adhesive layer, of the shielding layer is a flat surface. The shielding layer is provided with through holes penetrating the upper and lower surfaces thereof, which is beneficial for volatiles in the conductive adhesive layer to be exhausted through the through holes of the shielding layer at high temperature. Volatiles in the conductive adhesive layer can be easily discharged at high temperature. Theelectromagnetic shielding film is prevented from being peeled off from the ground layer of the circuit board due to bubbling and delamination of the electromagnetic shielding film. The electromagneticshielding film is grounded, and interference charges are led out.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an electromagnetic shielding film, a circuit board and a preparation method of the electromagnetic shielding film. Background technique [0002] With the rapid development of the electronics industry, electronic products are further developed toward miniaturization, light weight, and high-density assembly, which greatly promotes the development of flexible circuit boards, thereby realizing the integration of component devices and wire connections. Flexible circuit boards can be widely used in industries such as mobile phones, liquid crystal displays, communications and aerospace. [0003] Driven by the international market, functional flexible circuit boards dominate the flexible circuit board market, and an important indicator for evaluating the performance of functional flexible circuit boards is Electromagnetic Interference Shielding (EMI Shielding). With the integration ...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/0088
Inventor 苏陟
Owner GUANGZHOU FANGBANG ELECTRONICS
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