Nowadays, many objects are plated with gradient colors, and the colors are very bright and conspicuous. Now many brands of mobile phone cases also use this gradient color. Therefore, gradient colors are also attracting more and more attention, and the principle of gradient color production is also aroused. For everyone's interest, today I will introduce the principle and method of magnetron sputtering optical pvd coating machine to make gradient color in detail. I hope it can help everyone.

pvd coating machine mainly refers to a type of coating that needs to be carried out under high vacuum, including many types, including vacuum ion evaporation, magnetron sputtering, MBE molecular beam epitaxy, PLD laser sputtering deposition, etc. The main idea is to divide it into two types: evaporation and sputtering. As for the gradient color process, the magnetron sputtering coating equipment is generally used. At present, Huawei, Lenovo and other mobile phone gradient color shells have adopted the PVD vacuum gradient coating process.
 Magnetron sputtering is a type of physical vapor deposition (Physical Vapor Deposition, PVD). The general sputtering method can be used to prepare metals, semiconductors, insulators and other materials, and has the advantages of simple equipment, easy control, large coating area and strong adhesion, etc., while the magnetron sputtering method developed in the 1970s is more It realizes high speed, low temperature and low damage. Since high-speed sputtering is performed under low pressure, the ionization rate of the gas must be effectively increased. In magnetron sputtering, a magnetic field is introduced on the surface of the target cathode, and the confinement of the charged particles by the magnetic field is used to increase the plasma density to increase the sputtering rate.
Magnetron sputtering pvd coating machine is the most used equipment for existing products to coat under vacuum conditions. A complete magnetron sputtering vacuum coating machine is composed of multi-part systems, and each system can complete different To achieve the final high-quality coating, the magnetron sputtering coating consists of a vacuum chamber, a mechanical pump, a vacuum test system, an oil diffusion pump, a vacuum pumping system, a condensate pump, and a film formation control system.
The main body of the magnetron sputtering pvd coating machine is a vacuum chamber. The size of the vacuum chamber is determined by the processed product. The size of the magnetron sputtering coating can be customized. The chamber is generally made of stainless steel, which is required to be durable and not rusted. The magnetron sputtering coating vacuum chamber has many connection valves for connecting various auxiliary pumps.
The magnetron sputtering coating film formation control system can adopt different methods, such as fixed plating time, visual inspection, extreme monitoring and crystal vibration monitoring. pvd coating machine, pvd coating machine coating methods are also divided into a variety of processes, commonly used are ion evaporation coating and magnetron sputtering coating. The film plated by magnetron sputtering has strong adhesion and high purity, and can sputter a variety of materials with different compositions at the same time.
The above is the introduction of the gradient color principle of the magnetron sputtering optical pvd coating machine. I don’t know how everyone understands it. When newcomers see these relatively unfamiliar words, they may find it difficult to understand, but it doesn’t matter. Certain experience. At that time, you can understand at a glance.