NCVM (non conductive vacuum metallization) film coating method

Abstract

The invention discloses an NCVM (non conductive vacuum metallization) film coating method and is characterized in that the method comprises the following steps: A, activating treatment and cleaning treatment, that is, conducting activating treatment and cleaning treatment to the surface of a product to be coated, wherein the treatment time is 60 S, the degree of vacuum in a vacuum chamber reaches 70 Pa, and the voltage output to the vacuum chamber through transformation by an electric cabinet for film coating is 3600 V; and B, putting the product to be coated in the vacuum chamber for evaporation coating of a tin film, wherein the thickness of the tin film is 30 nanometers, the degree of vacuum in the vacuum chamber reaches 75 Pa, the voltage output to the vacuum chamber through transformation by the electric cabinet for film coating is 4000 V, and the tin coating time is not more than 80 S. As the surface of the product is activated and cleaned before film coating, and the technical parameter of evaporation coating of an NCVM film is optimized, the adhesion property of the NCVM film on the product is greatly improved, and the film is endowed with the characteristics of abrasion resistance, alcohol resistance, human sweat resistance, high-temperature and high-humidity storage, and the like.

Description

technical field [0001] The invention relates to the technical field of vacuum coating, in particular to a coating method of NCVM film. Background technique [0002] Electroplating technology is a functional finishing technology. Its alloy coating has the characteristics of excellent wear resistance, corrosion resistance, uniform coating thickness, and high density. It has been widely used in electronic products. With the rapid development of the electronics industry, the requirements for electroplating technology are getting higher and higher, and new technologies, new products, and new processes are emerging one after another. NCVM, also known as discontinuous coating technology or non-conductive electroplating technology, is a high-tech originating from ordinary vacuum electroplating. Vacuum plating, referred to as VM, is the abbreviation of vacuum metallization. It refers to the organic conversion of metal materials under vacuum conditions by using specific means such a...

AI Technical Summary

Problems solved by technology

[0004] The overall process of the current NCVM coating technology is still immature. The produced NCVM film, the metal is adsorbed on the surface of the plastic shell in the atomic fog state, and is completely exposed to the air. Because the metal film layer at this time has a certain "Metal activity", so in the process of use, fingerprints will be left, especially when encountering scratches, it is easy to damage the NCVM film, so it directly affects the appearance and performance of its products. However, in order to solve the above shortcomings, The coating technology of NCVM has been improved, and a UV baking process has been added. Although the performance has been greatly improved, the outermost layer is no longer a metal film, but hardened paint