Patent ID: 6740222
Filing Date: 2004-05-25
Classification: H05K

Abstract:
A method of plating an electrical contact on a substrate, comprising:forming a metal interconnect on first and second opposing sides of a substrate and through a via formed through the substrate; forming first and second dielectric layers on the metal interconnect and over the first and second sides of the substrate, respectively, wherein the first and second dielectric layers each have openings therethrough that expose portions of the metal interconnect; forming first and second plating layers on the first and second dielectric layers, respectively, and on the sides of the openings and on the exposed portions of the metal interconnect, the first and second plating layers electrically connected by the metal interconnect, wherein forming the first plating layer includes forming a discontinuous first plating layer; electroplating first and second contact layers over a respective portion of each of the first and second plating layers using the first and second plating layers; and removing a portion of each of the first and second plating layers from the first and second dielectric layers while leaving the portions of the first and second plating layers under the first and second contact layers.