My customer has asked if it is possible to control the glue squeeze on covercoat openings 100% of the time to .0025 or less. The covercoat is an LFO-0110 from DuPont. The parts have approx. 250 SMT openings on the top and 300 on the bottom. Openings are normally .026 x .026 or .030 x .036. We are not allowed to laser. This is a volume part so whatever is suggested must be cost effective. We have tried various combinations of press pad make-ups and pre-baking of the covercoats. We hold about 95% of the pads to .0025-.003 but have not been able to guarantee 100%.
Thanks for your time.
Regards Steve Kelly
PFC Flexible Circuits Limited