etmabreu
Full Member level 3
I'm trying to use PTFE laminate (Arlon's CuClad217) for our PCBs of prototypes and proofs-of-concept. Due to our kind of work we manufacture small amounts of PCBs (usually single prototypes).
It happens that, due to the very flexible nature of CuClad217, the raw boards always get some corrugation, i.e., the piece of CuClad217 is not perfectly flat.
During UV exposure, this lack of flatness prevents the transparency to properly lean against the CuClad laminate. This leads to incorrect exposure of the printed circuit.
How can one prevent this effect? How can one "flat" the material or, on the other hand, which techniques may help us to do a correct exposure with uneven material?
Thank you very much for your help,
It happens that, due to the very flexible nature of CuClad217, the raw boards always get some corrugation, i.e., the piece of CuClad217 is not perfectly flat.
During UV exposure, this lack of flatness prevents the transparency to properly lean against the CuClad laminate. This leads to incorrect exposure of the printed circuit.
How can one prevent this effect? How can one "flat" the material or, on the other hand, which techniques may help us to do a correct exposure with uneven material?
Thank you very much for your help,