Patent ID: 7910156

Claim:
A method of making a circuitized substrate, said method comprising: providing a substrate including at least one dielectric layer having an external surface and a first plurality of conductors and a second plurality of conductors on said external surface; applying a photo-resist covering over said first plurality of conductors but not over said second plurality of conductors on said external surface of said substrate; applying a layer of sacrificial solder-resist material over said photo-resist covering; exposing said first plurality of conductors having said photo-resist covering and said layer of solder-resist material thereon and said second plurality of conductors not having said photo-resist covering thereon to a quantity of molten solder so as to deposit said solder onto only said second plurality of conductors; and thereafter removing said layer of solder-resist material on said photo-resist covering and said photo-resist covering over said first plurality of conductors.