Patent ID: 9606430
Date: 2017-03-28
CPC Classifications: B41J,C09D,G03F,H05K

Claim:
1. A method of digitally printing a solder mask, the method comprising: providing a solder mask ink composition comprising: 1) a resin and 2) a solvent in an amount of at least 20% by weight relative to the total weight of the solder mask ink composition, wherein the composition has a viscosity that is less than 1000 cps at a shear rate of 10 s generating an aerosol stream from the solder mask ink composition with a pneumatic atomizer using an atomization gas; directing the aerosol stream through a nozzle and focusing the aerosol stream using a sheath gas onto a substrate while changing the position of the nozzle with respect to the substrate to selectively deposit a solder mask pattern; and curing the solder mask pattern.