Working Principle of Vacuum Coating Technology

1. Vacuum Environment Preparation

   Air inside the sealed chamber is pumped out to form a high-vacuum condition, which prevents target materials from reacting with oxygen/nitrogen in ambient air and ensures deposited film purity.
2. Source Material Vaporization/Atomization

   Based on different technical routes (PVD/CVD):

• PVD (Physical Vapor Deposition, mainstream for mobile parts): Solid coating targets are excited via high temperature, ion bombardment or arc discharge to evaporate into atomic/molecular particles;
• CVD: Raw material gas undergoes chemical decomposition to generate coating particles.

1. Deposition onto Substrate Surface
   Vaporized coating particles fly straight in the vacuum space, adhere and gradually stack on the cleaned workpiece (substrate) surface, forming a uniform, dense thin functional coating layer after continuous accumulation.

Supplement for your mobile phone coating scenario