Patent ID: 7033946
Filing Date: 2006-04-25
Classification: H01L,Y10S

Abstract:
1. A method of removing a silicon oxide layer from an article comprising silicon, the method comprising: locating the article in a reaction chamber, the article including a feature having an aspect ratio of depth relative to width of between about 2:1 and about 40:1; introducing a non-fluorine-containing interhalogen compound reactive with the silicon oxide layer into the reaction chamber so as to remove the silicon oxide layer from the feature, the non-fluorine-containing interhalogen compound forming volatile by-product gases upon reaction with the silicon oxide layer; increasing a temperature of the reaction chamber, during introduction of the non-fluorine-containing interhalogen compound, using a heating apparatus associated with the reaction chamber; introducing an inert gas into the reaction chamber; evacuating unreacted interhalogen compound, the inert gas, and the volatile by-product gases from the reaction chamber, and depositing a metal layer on the portion of the feature while the article is in the reaction chamber.