Patent ID: 8163341
Filing Date: 2012-04-24
Classification: C23C

Abstract:
1. A method of forming a metal-containing structure, comprising: flowing hydrogen-containing reactant into a reaction chamber having a semiconductor substrate therein, the hydrogen-containing reactant comprising one or both of formic acid and formaldehyde, the semiconductor substrate having a metal-containing surface, the hydrogen-containing reactant forming a hydrogen-containing layer across the metal-containing surface; the metal-containing surface being comprised by a first metal-containing material; flowing a metal-containing precursor into the reaction chamber, the metal-containing precursor reacting with hydrogen from the hydrogen-containing layer to form a second metal-containing material directly against the metal-containing surface; wherein the metal-containing precursor and hydrogen-containing reactant are within the reaction chamber at different and substantially non-overlapping times relative to one another; and wherein the second metal-containing material is purer than the first metal-containing material relative to one or more of oxygen, nitrogen and carbon contamination.