Patent ID: 8726498

Claim:
A method for filling a hole in a printed wiring board, comprising: providing the printed wiring board comprising: an insulating layer having a first surface and a second surface opposite the first surface, a first conductive layer disposed overlying the first surface, the first conductive layer having a bottom surface facing the first surface and an upper surface opposing the bottom surface, and a second conductive layer overlying the second surface, wherein the insulating layer is disposed between the first conductive layer and the second conductive layer; drilling the hole that extends through the printed wiring board, wherein the hole defines an inner surface; plating a first conductive material over the inner surface; after plating the first conductive material over the inner surface: then applying photoresist directly overlying: the first conductive material, an area above the hole and the upper surface of the first conductive layer; then removing a portion of the photoresist that directly overlies the area above the hole, and leaving other remaining portions of the photoresist directly overlying other portions of the upper surface of the first conductive layer; and then substantially filling the hole with a second conductive material such that the second conductive material is electrically connected to portions of the first conductive layer that are not covered by the other remaining portions of the photoresist that directly overlie the other portions of the upper surface of the first conductive layer, wherein the other remaining portions of the photoresist that directly overlie the other portions of the upper surface of the first conductive layer substantially prevent the second conductive material from adhering to the other portions of the upper surface of the first conductive layer during the filling of the hole with the second conductive material.