Patent ID: 7951414
Filing Date: 2011-05-31
Classification: C23C,C25D,H01L

Abstract:
1. A method of forming electrically conductive structures, comprising: forming two sets of openings over a semiconductor substrate, a first of the two sets having a greater aspect ratio than a second of the two sets; overfilling the first set of the openings with a first conductive material while only partially filling the second set of the openings with the first conductive material; planarizing a surface of the first conductive material within the first set of openings; after the planarizing, exposing the substrate to plating conditions that selectively deposit activation material over the first conductive material within the second set of the openings while leaving the first conductive material exposed within the first set of the openings; and selectively forming second conductive material on the activation material relative to the exposed first conductive material.