What is the physical evaporation coating

- Jul 25, 2020-

What is the physical evaporation coating? Describe the steps briefly.


Physical evapotranspiration coating is the process of heating a substance to evaporate and depositing the vapor on a predetermined substrate. As the evaporation source must be volatilized by heating, and is carried out in a vacuum, it is also called hot evaporation or vacuum evaporation.
It can be divided into three steps
(1) The condensate is heated to evaporate into a vapor phase
(2) The steam moves in the air for a distance to the substrate
(3) The steam is cooled on the substrate and condensed into a film


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