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What is thermal evaporation?

Thermal Evaporation is one of the simplest of the Physical Vapor Deposition (PVD) techniques.

The process is as below:
1. Material is heated in a vacuum chamber until its surface atoms have sufficient energy to leave the surface. 
2. At this point they will traverse the vacuum chamber and coat a substrate positioned above the evaporating material. 

thermal-evaporation

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