Application of Legend
The panel is now ready for applying the legend, the legend is applied by means of a direct legend printer, which prints and then cures the legend.
The legend file is sent to the legend printer, the panel is put on the legend printer, which then picks up fudical points on the circuit, then aligns the legend file to the circuit then prints the legend, curing as it prints.
The panel is then cured for 90 mins @ 150C to cure the Soldermask. This then fully polymerises the soldermask, so that it can stand up to the subsequent soldering operations.
The cured soldermasked panel is then ready for the application of the metallic solderable finish.