Vacuum coating machine mainly refers to a type of coating that needs to be performed under a relatively high degree of 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.
The gradient color process generally uses magnetron sputtering coating equipment. Currently, the gradient color casings of many mobile phone models such as Huawei and Lenovo use 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.
The magnetron sputtering method developed in the 1970s has achieved high speed, low temperature and low damage. Because high-speed sputtering is performed under low pressure, the gas ionization rate must be effectively increased. Magnetron sputtering introduces a magnetic field to the surface of the target cathode and uses the magnetic field to constrain charged particles to increase the plasma density to increase the sputtering rate.
Magnetron sputtering vacuum coating machine is the most commonly used equipment for coating existing products under vacuum conditions. A complete magnetron sputtering vacuum coating machine is composed of multiple parts of the system. Each system can complete different functions to achieve the final high-quality coating. The components of magnetron sputtering coating include vacuum chamber, mechanical pump, vacuum test system, oil diffusion pump, vacuum system, condensation pump, film formation control system, etc.
The main body of the magnetron sputtering vacuum coating machine is the vacuum chamber. The size of the vacuum chamber is determined by the processed products. The size of the magnetron sputtering coating can be customized. The chamber is generally made of stainless steel and is required to be strong, durable and rust-free. The magnetron sputtering coating vacuum chamber has many connecting valves to connect 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. Vacuum coating machines and vacuum coating machine coating methods are also divided into various processes. Commonly used ones include ion evaporation coating and magnetron sputtering coating. The film layer plated by magnetron sputtering has strong adhesion and high purity, and can sputter a variety of materials with different compositions at the same time.
