Patent ID: 7989329

Claim:
A process for treating a silicon-containing substrate in a process chamber, comprising: depositing a layer of dopants on at least a portion of a surface of the substrate; forming a capping layer over at least a portion of the dopant layer; thermally treating the substrate to diffuse the dopants into the substrate and activate the dopants; providing a reactive etchant to the process chamber; removing the capping layer from the dopant layer; forming one or more volatile compounds by reacting the etchant with dopants, wherein the one or more volatile compounds comprise arsine (AsH 3 ), phosphine (PH 3 ), borane (BH 3 ), diborane (B 2 H 6 ), borazine (B 3 H 6 N 3 ), combinations thereof, or derivatives thereof; and removing the one or more volatile compounds from the process chamber.