CN214736041U - Non-conductive vacuum plating film for mobile phone cover plate - Google Patents

Abstract

The utility model discloses a non-conductive vacuum plating film for a mobile phone cover plate, which comprises a glass substrate, wherein a primer layer, a lower dielectric layer, an NCVM layer, an upper dielectric layer and a finish paint layer are sequentially laminated on the top surface of the glass substrate from bottom to top; the lower dielectric layer is a monocrystalline silicon layer or a nitride layer; the upper dielectric layer is a nitride layer; abandoning the traditional method of adding color paste into middle coating or top coating, introducing an upper dielectric layer and a lower dielectric layer, wherein the upper dielectric layer and the lower dielectric layer are both made of non-oxide materials, so that the NCVM layer can be prevented from being oxidized and chemically corroded, and the NCVM layer can be protected; the wavelength of interference generated by reflected light is different by adjusting the material composition and the film thickness of the upper dielectric layer and the lower dielectric layer, and the reflected light is combined with the NCVM layer, so that the non-conductive vacuum plating films with various colors are obtained; because color paste is not adopted, the binding force of the film system can be ensured, and the phenomenon of paint falling is prevented.

Description

Non-conductive vacuum plating film for mobile phone cover plate

Technical Field

The utility model relates to a functional film technical field specifically is a non-conducting vacuum electroplating film for cell-phone apron.

Background

In recent years, mobile phone consumption has become an indispensable part of human physical life. The products with high gloss, high brightness metal shell and surface metal plating appearance on the market are generally favored by consumers. However, with the gradual popularization of wireless charging and the arrival of novel transmission modes in the 5G era and the like, more various antennas are carried on the mobile phone, especially, the 5G era communication adopts a millimeter wave technology with a higher frequency band, the antenna design is more complicated, and the metal shell is difficult to deal with the design problem of the mobile phone antenna. This is mainly due to the conductivity of metal, and the electromagnetic field generated by the communication equipment during receiving or transmitting signals is accumulated by the conductive metal, thereby affecting the RF performance and ESD performance of the communication equipment.

Based on this, the non-conductive vacuum plating technology (NCVM) is widely used for the surface of mobile phones and various electronic products. The NCVM adopts films of coating metal, insulating compounds and the like, and utilizes the characteristics of various discontinuities to obtain the final appearance with metal texture without influencing the effect of wireless communication transmission. The primer, the intermediate paint and the finish paint are generally UV coatings, and the intermediate paint layer is used or not according to specific conditions, and mainly plays a role in coloring or improving performance.

As the main component of the UV coating is organic matter, the UV coating is easy to be corroded by oxygen and water vapor, so that the oxidation of the non-conductive metal film layer is caused, and the problem that the bonding force between the NCVM layer and the UV coating is reduced is caused. Meanwhile, most of the existing NCVM processes use a tin (Sn) target or an indium (In) target as a main target material of the NCVM process, which mainly utilizes the advantage of low conductivity of Sn and In, but the metallic luster presented by the NCVM processes is warm and has little selectivity.

In order to solve the problem of monotonous color of the mobile phone cover plate obtained by the NCVM process, the mainstream color cover plate manufacturing approach at present is to add color paste into middle coating or top coating UV coating. However, after the color paste is added, the adhesive force of the coating is deteriorated, and the color paste can act with UV ultraviolet light, so that the higher the concentration of the color paste is, the poorer the UV energy absorption of the UV coating, and the poorer the deep curing, so that the phenomenon of paint falling between the color intermediate coat or the top coat layer and the primer layer is easy to occur.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a non-conducting vacuum plating film for mobile phone cover board, this plating film can realize the outward appearance of multiple colour to membrane system cohesion is strong, and is anti-oxidant, prevents to appear falling the lacquer phenomenon.

The utility model provides a technical scheme that its technical problem adopted is:

a non-conductive vacuum plating film for a mobile phone cover plate comprises a glass substrate, wherein a primer layer, a lower dielectric layer, an NCVM layer, an upper dielectric layer and a finish paint layer are sequentially laminated on the top surface of the glass substrate from bottom to top;

the lower dielectric layer is a monocrystalline silicon layer or a nitride layer; the upper dielectric layer is a nitride layer.

Furthermore, the nitride of the lower dielectric layer and the upper dielectric layer is carbon nitride, silicon nitride, titanium nitride or aluminum nitride.

Further, the NCVM layer adopts indium, tin, zinc, titanium, zirconium or alloy of the above metals.

The utility model has the advantages that the traditional method of adding color paste in the middle coating or the top coating is abandoned, the upper and the lower dielectric layers are introduced, and both the upper and the lower dielectric layers adopt non-oxide materials, so that the NCVM layer can be prevented from being oxidized and chemically corroded, thereby playing the role of protecting the NCVM layer; the wavelength of interference generated by reflected light is different by adjusting the material composition and the film thickness of the upper dielectric layer and the lower dielectric layer, and the reflected light is combined with the NCVM layer, so that the non-conductive vacuum plating films with various colors are obtained; because color paste is not adopted, the binding force of the film system can be ensured, and the phenomenon of paint falling is prevented.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1, the utility model provides a non-conductive vacuum plating film for mobile phone cover plate, which comprises a glass substrate 1, wherein a primer layer 2, a lower dielectric layer 3, an NCVM layer 4, an upper dielectric layer 5 and a finish paint layer 6 are sequentially laminated on the top surface of the glass substrate 1 from bottom to top; the lower dielectric layer 3 is a monocrystalline silicon layer or a nitride layer; the upper dielectric layer 5 is a nitride layer.

Preferably, the nitride of the lower dielectric layer and the upper dielectric layer is carbon nitride, silicon nitride, titanium nitride or aluminum nitride. The NCVM layer 4 is made of indium, tin, zinc, titanium, zirconium, or an alloy of the above metals.

Abandoning the traditional method of adding color paste into middle coating or top coating, introducing an upper dielectric layer and a lower dielectric layer, wherein the upper dielectric layer and the lower dielectric layer are both made of non-oxide materials, so that the NCVM layer can be prevented from being oxidized and chemically corroded, and the NCVM layer can be protected; the wavelength of interference generated by reflected light is different by adjusting the material composition and the film thickness of the upper dielectric layer and the lower dielectric layer, and the reflected light is combined with the NCVM layer, so that the non-conductive vacuum plating films with various colors are obtained; because color paste is not adopted, the binding force of the film system can be ensured, and the phenomenon of paint falling is prevented.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial, or industrial. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims (2)

1. A non-conductive vacuum plating film for a mobile phone cover plate is characterized by comprising a glass substrate, wherein a primer layer, a lower dielectric layer, an NCVM layer, an upper dielectric layer and a finish paint layer are sequentially laminated on the top surface of the glass substrate from bottom to top;

the lower dielectric layer is a monocrystalline silicon layer or a nitride layer; the upper dielectric layer is a nitride layer.

2. The non-conductive vacuum plating film for the cover plate of the mobile phone according to claim 1, wherein the nitride of the lower dielectric layer and the upper dielectric layer is carbon nitride, silicon nitride, titanium nitride or aluminum nitride.

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