Patent ID: 7071127

Claim:
A method for selectively reducing concentration of contaminant particles in a semiconductor oxide composition that is formed by chemical vapor deposition (CVD) using a semiconductor-element-providing reactant and an oxygen-providing reactant, where the contaminant particles in the semiconductor oxide composition are materials other than said semiconductor and other than oxygen, the reducing method comprising: (a) generating energy-transferring radicals; (b) flowing the energy-transferring radicals to the CVD-formed semiconductor oxide composition so that the flowed radicals can transfer disassociating energy to at least some contaminant particles in the semiconductor oxide composition, if any, and thereby cause disassociation of the at least some contaminant particles; and (c) flowing at least some of the disassociated contaminant particles away from the semiconductor oxide composition; wherein said semiconductor-element-providing reactant includes dichlorosilane (DCS).