The resistance evaporation coating process of evaporation pvd coating machine is the most common coating process. It has a simple process, simple equipment structure, and low cost. However, the range of coating workpieces is limited, and the target materials are limited. It can only plate materials with low melting points, and its application share in the market is It is still relatively high, and the annual supply demand for evaporation pvd coating machine in the market is still relatively large. Below, the editor of Huicheng Vacuum will introduce the characteristics of the resistance evaporation coating process of the vacuum coating machine in detail from four aspects. I hope it can help you:

1. Definition of vacuum
Generally refers to the state of gas below one atmosphere. Compared with the normal atmospheric pressure state, the molecular density is thinner, so the collision probability between gas molecules and gas molecules, gas molecules and the wall is lower.
2. Definition of vacuum evaporation coating
Vacuum evaporation coating is a technology that uses an evaporator to heat the evaporated material to vaporize it under vacuum conditions. The stream of evaporated particles is directly directed towards the substrate and deposited on the substrate to form a solid thin film. Including thermal evaporation and EB evaporation (electron beam evaporation)
3. Main process of vacuum evaporation coating
1) Convert various energy sources into thermal energy, heat the film material to evaporate or sublimate it, and turn it into gaseous particles (atoms, molecules and atomic groups) with a certain amount of energy.
2) Leaving the surface of the membrane material, the gaseous particles with considerable moving speed are transported to the surface of the substrate in a straight line flight that is basically free of collision;
3) The gaseous particles that reach the surface of the substrate condense and nucleate and grow into a solid film.
4) The atoms that make up the film are rearranged or chemically bonded
4. Thermal evaporation principle and characteristics
Thermal evaporation is a coating technology that uses resistance heating to reach the melting temperature of the material to be evaporated under vacuum conditions, causing the atoms to evaporate and reach and adhere to the surface of the substrate.
 Features: The resistance evaporation pvd coating machine is cheap and easy to operate and is widely used for conductor materials such as Au, Ag, Cu, Ni, In, and Cr.