An evaporation coating machine is a device that operates in a vacuum environment. It heats coating materials (target materials) to evaporate and form gaseous atoms/molecules. These gaseous particles then deposit and condense on the surface of the substrate, eventually forming a thin film. It is widely used in optics, electronics, decoration, and other fields.
It's a classic type of Physical Vapor Deposition(PVD) equipment, differ significantly from other comon coating machines(e.g., sputtering coating machines, arc ion plating machines) in performance, cost, and application.
It heats materials directly to vaporize them. This enables much faster deposition rates for low-to-medium melting-point materials, making them ideal for high-volume production of decorative or simple functional films.Evaporation systems have fewer complex components. Their initial purchase cost is typically lower than sputtering coaters, and maintenance is cheaper. In a high-vacuum environment, evaporated vapor molecules have short mean free paths and minimal collision with air molecules. This produces films with fewer impurities. Moreover, evaporation can be operated at lower substrate temperature by controlling the vapor flux and vacuum level. This makes it suitable for coating heat-sensitive substrate like plastics.