A kind of manufacturing method of electromagnetic shielding film
The technology of an electromagnetic shielding film and its manufacturing method, which is applied in the field of electronic communication, can solve problems such as easy failure and poor stability, and achieve the effects of stable process, reliable stability, and improved application range and added value
Active Publication Date: 2019-09-24
HAINING ZHUOTAI ELECTRONICS MATERIALS CO LTD
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Problems solved by technology
[0003] At present, the shielding methods in the high-frequency signal range in the industry are not very mature. The electromagnetic film products provided by Japanese manufacturers in the market can achieve good shielding effects in the range of 10MHZ to 1GHZ. Some domestic electromagnetic film manufacturers provide products in the Above 1GHZ can achieve some satisfactory results, but the stability is very poor, and it cannot withstand repeated impacts under harsh environmental conditions and is easy to fail
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[0026] As mentioned in the background technology section, at present, the shielding methods in the high-frequency signal range in the industry are not very mature. The electromagnetic film products provided by Japanese manufacturers in the market can achieve good shielding effects in the range of 10MHZ to 1GHZ. Some domestic The products provided by electromagnetic film manufacturers can achieve some satisfactory results above 1GHZ, but their stability is very poor, and they cannot withstand repeated impacts under harsh environmental conditions and are prone to failure.
[0027] Based on this, an embodiment of the present invention provides a method for manufacturing an electromagnetic shielding film, including:
[0028] Unwind the high-temperature-resistant flexible film on the coating line and pass through the coating head, and evenly coat the black glue with a thickness of 2μm to 5um, and use an oven to dry the high-temperature-resistant flexible film;
[0029] Plating a me...
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Abstract
The invention discloses a manufacture method of electromagnetic shielding films. The method comprises the following steps: unreeling a high-temperature-resistant flexible film on a coating line, ensuring that the high-temperature-resistant flexible film passes through a coating head, uniformly coating black adhesive with the thickness being 2 to 5 [mu]m, and then drying the surface of the high-temperature-resistant flexible film with a baking over; plating a metal shielding layer on the dried high-temperature-resistant flexible film in a vacuum environment; coating a layer of conductive adhesive layer which is 5 to 8 [mu]m in thickness and used for absorbing electromagnetic wave, on one side, plated with the metal shielding layer, of the high-temperature-resistant flexible film; ensuring that conductive adhesive adopts a mixture of PU adhesive or epoxy adhesive at a weight ratio being 50 to 80, conductive power at a weight ratio being 5 to 10, magnetic powder at a weight ratio being 20 to 50 and a solvent. According to method, electromagnetic shielding films with the thickness being 10 to 50 [mu]m can be continuously and efficiently produced, the shielding effect exceeding 60 db is realized within 10 MHZ to 10 GHZ, the technology is stable, and the method is simple to operate.
Description
technical field [0001] The invention relates to the technical field of electronic communication, in particular to a method for manufacturing an electromagnetic shielding film. Background technique [0002] Some electromagnetic shielding materials appearing on the market simply start from metal shielding, which can effectively solve the signal shielding problem between 10MHZ and 1GHZ. However, when it comes to electromagnetic wave signals above 1GHZ frequency, it is difficult to achieve a shielding effect of more than 60db. effect, which limits the scope of product application. How to develop a high-frequency signal shielding ultra-thin material above 1GHZ is particularly urgent for ultra-thin and miniaturized applications of mobile phones and other products. [0003] At present, the shielding methods in the high-frequency signal range in the industry are not very mature. The electromagnetic film products provided by Japanese manufacturers in the market can achieve good shie...
Claims
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IPC IPC(8): C09J7/25C09J7/40C09J9/02C09J175/04C09J163/00C09J11/00B05D7/00B05D7/04
Inventor 田海玉田辉得占元明
Owner HAINING ZHUOTAI ELECTRONICS MATERIALS CO LTD