PVD technology is a physical process to achieve material transfer, transferring atoms or molecules from the source to the surface of the substrate. Through this technology, some particles with special properties (such as high strength, wear resistance, heat dissipation, corrosion resistance, etc.) can be sprayed on the matrix with lower performance, so that the matrix has better performance. The basic PVD methods include vacuum evaporation, sputtering and ion plating. PVD technology has the characteristics of compact and uniform coating layer, strong adhesion, good plating property, fast deposition speed, low processing temperature and wide range of plating materials. Therefore,PVD technology is widely used in the field of surface treatment engineering and is one of the best choices. In addition, the coating process of PVD itself is also a glow reaction under the plasma field at high temperature, and has a high purification process. In addition, the main raw material of PVD products is titanium metal, titanium is one of the metals with the most human skin affinity, making PVD products have pure environmental performance.
PVD technology can produce thousands of colors and can even mimic colors found in nature. For example, the gold series has European gold (2N18 and 1N14), Japanese gold (GY01), Chinese gold (GY2N) and so on; Coffee series includes dark coffee, light coffee, medium coffee, etc. The black series has gun color, gray, super black and so on; The fashion collection has space color, champagne color, khaki and so on. Therefore,PVD technology has great flexibility and diversity in color selection. Different from PVD technology, water plating technology is a traditional electroplating method, which is a way of realizing the electrochemical process. It uses positive and negative electrodes in the plating tank under the action of current to achieve the deposition of metal or non-metal films. Water plating can usually achieve gold plating, silver plating, nickel plating, chromium plating, cadmium plating and other surface coatings, but its electroplating solution has a large pollution problem. Water plating also includes electroplating and electroless plating two types, electroplating is suitable for surface decoration, because it provides a high brightness surface, and electroless plating surface is more dull, suitable for anti-corrosion coating.
Vacuum evaporation, sputtering and ion plating are the main methods of PVD technology. Among them, vacuum evaporation method is to heat and melt the metal under high vacuum conditions, so that it evaporates and deposits on the surface of the sample, thus forming a metal film. Sputtering usually refers to magnetic sputtering, requiring a vacuum of about 1×10-3Torr, and adding high voltage direct current between the plastic substrate and the metal target, using glow discharge to blast out the atoms of the metal target and deposit them on the plastic substrate. Ion plating is a method of partially ionizing the gas or evaporated substance by gas discharge, and depositing the evaporated substance or its reaction product on the substrate under the bombardment of the gas ion or evaporated substance ion. Coating is a technology of local deposition of metal on the surface of metal workpiece by rapid electrochemical method, which belongs to a technology of electrochemical machining in principle and essence. In the plating process, metal ions are deposited on the cathode by electroplating solution under the action of electric field to form a thin film. Coating is often used in chrome plating, nickel plating and other applications. In summary,PVD technology provides a high-tech content, widely used ion coating technology, with many advantages, including variable color, dense and uniform coating, strong adhesion, low processing temperature. Compared with traditional technologies such as water plating and coating,PVD technology is widely used in high-quality and demanding products and fields.
