PVD (Physical Vapor Deposition) film on electronic product metal surface and preparation method thereof

Abstract

The invention discloses a PVD (Physical Vapor Deposition) film on an electronic product metal surface and a preparation method of the PVD film. The PVD film comprises a metal base material, wherein a plurality layers of metal or metal compound films are deposited on the surface of the metal base material; the thickness of the film is 0.1-3mu m; the preparation method comprises the following steps of: selecting a product to be machined as the base material; carrying out pretreatment; coating the film on the base material which is subjected to pretreatment by using a magnetron sputtering machine, namely, firstly, baking the base material at 120-200 DEG C, secondly, carrying out ion cleaning on the base material in the vacuum state greater than 7*10<-3>Pa, wherein the cleaning time is set as 5-10 minutes, and the vacuum degree in ion cleaning is reduced to be about 7*10<-1>Pa; after the ion cleaning is accomplished, and coating the film on the base material in the vacuum state of 6.4*10<-3>Pa, wherein the vacuum degree in coating the film is reduced to be about 2.3*10<-1>Pa. Colors can be coated on the metal surface, such as a golden yellow series, a dark series, silver, coffee, tarnish, a blue series, a purple series and the like; the film layers are solid; the color is variable; in-batch production can be conducted.

Description

technical field [0001] The invention relates to a surface decoration / functional film, in particular to a PVD film on the metal surface of an electronic product and a preparation method thereof. Background technique [0002] At present, with the advancement of science and technology, the degree of metallization of electronics and communication consumer goods (especially mobile phones) is getting higher and higher, and the surface hardness, corrosion resistance, friction resistance, high temperature and high humidity resistance and surface color, etc. The requirements are also getting higher and higher. [0003] In the prior art, for example, the Chinese patent (application number 201110062689.7) discloses a spraying process for plastic parts of mobile phones, which can control the performance and color of mobile phone surface decoration by controlling the spraying of primer and topcoat. This method is applied to the mobile phone of metal shell, and its performance and surfac...

AI Technical Summary

Problems solved by technology

[0007] The multi-arc ion plating technology has a high coating rate, but the prepared film is rough, has many impurities, and the film stress is high; DC sputtering ionization rate is low, the film stress is high, and the surface is rough

Moreover, these two technologies have relatively high pressure and temperature requirements for coating, and the prepared colors are relatively simple, unable to make complex and brilliant colors, and have been unable to meet the needs of consumers.