1. Brown stripes on the surface of the film
Low vacuum pressure
Solution: Clean the aluminum feeding device, vapor deposition device, cooling system, unreeling and reeling device, and guide roller in the vacuum chamber. Check the vacuum system and reduce the ambient humidity.
Film releases gas
Solution: Pre-drying for film, and extend the vacuum pumping time.
Too much aluminum spray
Solution: Increase the speed, reduce the evaporation boat current and reduce the speed of feeding aluminum.
Evaporation boat contains impurities
Solution: Clean the evaporation boat and heat shield.
Evaporation boat is aging
Solution: Replace the evaporation boat.
2. There are holes during the aluminum film plating
There is too much aluminum material in evaporation boat
Solution: Reduce the speed of aluminum feeding. Increase the evaporation boat current.
Short out between evaporation boats in the vacuum chamber
Solution: Block the short circuit
Impurity splashes in vacuum chamber
Solution: Clean the vacuum chamber wall, aluminum vapor deposition device, cooling drum, unwind, take-up device and each guide roller.
3. Stretch phenomenon during the aluminum plating
The tension of substrate is too high
Solution: Adjust the unreeling and reeling tension control system and reduce the tension appropriately.
The cooling system is malfunctioning
Solution: Check the cooling system and troubleshoot.