Patent ID: 8288266

Claim:
A circuitized substrate assembly comprising: a substrate including a first surface and at least one through hole having predetermined dimensions; circuit elements on said first surface of said substrate; a first thin layer of liquid permanent photoimageable solder mask material disposed in said at least one through hole on said first surface of said substrate, said first thin layer of solder mask being tack dried at a first predetermined temperature for a first predetermined period of time for drying solvent and cleaning said solder mask material, and defining a first plurality of openings therein which expose parts of said circuit elements; a second thin layer of liquid permanent photoimageable solder mask material subsequently being positioned directly over said first thin layer of permanent photoimaged solder mask material to help eliminate volatiles from said first solder mask, whereby said first and second layers of solder mask do not sacrifice adhesion to said circuit elements, said second thin layer of solder mask being tack dried at a second predetermined temperature for a second predetermined period of time, and defining a second plurality of openings; a solder element secured to selected ones of said exposed parts of said circuit elements; and an electronic component electrically coupled to selected ones of said solder elements so as to electrically couple said electronic component to said selected ones of said circuit elements.