Hello Technos,

Some many years ago I have discovered, with help from this illustrious panel, the existence of the dyne pens. Have used them for a while and them moved to microelectronics, where I have spent 11 years without any contact with conformal coating. So I've kinda forgot some details.
Where I work we have the Surface Analyst device, measuring contact angles and this is supposed to obsolete the use of dyne pens.

The trouble is I can't remember what dyne values are related to good coating wetting. Or even better, which contact angles are preferred?

Can anyone help?
I'm interested in both solder masked PCBs and Au plated ceramics and the optimal values I believe differ from PCB to ceramics.

Also, do you have any good articles or textbooks to recommend on this matter?

Thanks,

Ioan