Patent ID: 7927986
Filing Date: 2011-04-19
Classification: H01J,H01L

Abstract:
1. A method of plasma doping comprising: providing a dopant heavy halogenide compound gas to a plasma chamber; forming a plasma in the plasma chamber with the dopant heavy halogenide compound gas, the plasma generating desired dopant ions and heavy fragments of precursor dopant molecule; forming a surface layer on a substrate; biasing the substrate in the plasma chamber so that the desired dopant ions impact the substrate with a desired ion energy, implanting the desired dopant ions and the heavy fragments of precursor dopant molecule into at least one of the substrate and the film, the desired dopant ions being implanted at a first depth and the heavy fragments of precursor dopant molecule being implanted at a second implant depth, the second implant depth being substantially 20% of the first implant depth or less; and removing the surface layer after the implanting, wherein at least one of ion energy and a composition of the dopant heavy halogenide compound is chosen so that an implant profile in the substrate is substantially determined by the desired dopant ions.