PCB films deformation’s reason and solve menthod

 

The reason and solve for PCB films deformation

The reason :

(1) The temperature and humidity is out of control .

(2) The exposure machine’s temperature is very high .

 

The solve ways ,

(1) In general ,the temperature should be controlled under 22±2℃,and humidity should be controlled under 55%±5%RH

(2) Using the clod light or the exposure machine with cooling installation ,and change the films continually .

 

In addition ,we have 6 methods to correct the films deformation as below ,

Change the hole position ,Hang up ,Splicing ,Pad overlap ,Mapping,and Photographic.

And let us study it more next time .

pcb exposure

 

 

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