Today follow me to know the FPC exposed process operation notes, exposed is the very important step of making flexible circuits.

(1) The vacuum framework of exposure machine is essential, vacuum degree≥ 90%, only through the vacuum machine to let film tightly with the base substrate, and to ensure that no distortion of the circuits in order to improve accuracy.
(2) After the exposed, should immediately remove the panels, otherwise peripheral vision of light will cause unwanted film in developing of flex circuits.
(3) Working conditions must be met: clean (10,000 scale or higher) operating under yellow light, indoor temperature and humidity (21 ± 1 ℃, 55 ± 5%). Exposed machine should have the cooling air exhaust system.
(4) Exposed, the film emulsion side must face down, and  firmly stick the light-sensitive surface side to improve the resolution for circuits.
(5) Exposed machine should regularly calibrate to ensure accurate exposure.

Related Posts:
1. The structure of FPC;
2. Flexible Circuits Production Process;
3. The stiffener of flexible circuits.