Patent ID: 7700478
Filing Date: 2010-04-20
Classification: H01L

Abstract:
1. A process for forming a plurality of conductive structures in a substrate, the process comprising: forming a plurality of recesses in the substrate, wherein the plurality of recesses include recesses having different dimensions; (i) forming a conductive layer of a first material in the presence of an accelerator that promotes formation of the first conductive material which at least partially fills the plurality of recesses; (ii) annealing the conductive layer of the first material to relieve stress in the conductive layer and to improve the conductive properties of the conductive layer and to improve the adherence of the first material to recesses within the substrate, wherein the improvement in the conductive properties is relative to the conductive properties of an un-annealed conductive layer; and (iii) sequentially repeating acts (i) and (ii) for the first material until each of the recesses of the plurality of recesses are filled to a desired dimension with two or more successively formed and annealed layers of the first material and such that the conductive material in the recess of small dimensions are more uniformly adhered to the bottom surface of the recesses.