Analyse de la déformation du film dans le processus de PCB
Oct. 18, 2022
1、 Causes and solutions of negative film deformation: Reason: (1) Temperature and humidity control failure (2) The temperature rise of the exposure machine is too high Solution: (1) Generally, the temperature is controlled at 22 ± 2 ℃ and the humidity is 55% ± 5% RH. (2) The exposure machine with cold light source or cooling device shall be used and the backup film shall be replaced continuously.

