Vacuum coating application is a major branch of vacuum application. It is widely used in many aspects, such as optics, electronics, physical and chemical instruments, packaging, machinery and surface treatment technology.
The application of vacuum coating is simply understood as plating metal films or coatings on metal, glass, ceramics, semiconductors and plastic parts by means of evaporation, sputtering and subsequent condensation in a vacuum environment. Compared with the traditional coating method, vacuum coating application belongs to a dry coating, and its main methods include the following:
The principle of vacuum evaporation is that under vacuum conditions, the evaporator is used to heat the belt to evaporate the material, so that it can be gasified or sublimated. The evaporated ion stream is directly injected into the substrate, and the solid film is deposited on the substrate.
Sputter coating and sputter coating are connected with 2000V high voltage electricity at the cathode under vacuum conditions to excite glow discharge. Positively charged argon ions impact the cathode to emit atoms. The splashed atoms are deposited on the substrate through inert atmosphere to form a film layer.
Ion coating, that is, the vacuum ion coating introduced by the manufacturer of dry screw vacuum pump. It is developed on the basis of the above two vacuum coating technologies, so it has both process characteristics. Under vacuum conditions, the working gas or evaporated material (film material) is partially ionized by gas discharge, and the evaporated material or its reactant is deposited on the surface of the substrate under ion bombardment. During the formation of the film, the substrate is always bombarded by high-energy particles and is very clean.
Vacuum winding coating is a technology of continuous coating on flexible substrate by physical vapor deposition, in order to realize some functional and decorative properties of flexible substrate.
Beam deposition, an ion surface composite treatment technology combining ion implantation and vapor deposition coating technology, is a technology that uses ionized particles as evaporation materials to form films with good characteristics at relatively low substrate temperature.