Patent ID: 7802360

Claim:
A method for filling at least one hole in a printed wiring board, the method comprising the steps of: providing a printed wiring board with a hole; plating an inner surface of the hole in the board with a first conductor; applying photoresist material to a first side and a second side of the board; exposing a portion of the photoresist material on the first side of the board to developing light, wherein the portion of the photoresist material on the first side of the board that is not exposed to developing light covers an opening of the hole on the first side of the board; exposing the photoresist material on the second side of the board to developing light; washing the board to remove unexposed photoresist material, wherein the unexposed photoresist material that covers the opening of the hole on the first side of the board is removed; and filling the hole in the board with a second conductor; wherein the photoresist material substantially prevents the second conductor from contacting the first and second sides of the board during said filling.