Patent ID: 7288491

Claim:
A method of performing plasma immersion ion implantation on a workpiece in a plasma reactor chamber, comprising: prior to placing the workpiece in the plasma reactor chamber, depositing a seasoning film on the interior surfaces of the plasma reactor chamber by introducing a seasoning film precursor gas into the chamber and generating a plasma within the chamber; placing the workpiece on a workpiece support in the chamber; and performing plasma immersion ion implantation on the workpiece by introducing an implant species precursor gas into the chamber and generating a plasma; removing the workpiece from the chamber; and removing the seasoning film from the chamber interior surfaces, wherein one of: (a) said implant species precursor gas comprises a fluoride of a dopant species, said seasoning film precursor gas comprises a fluorocarbon gas and said seasoning film comprises a fluorocarbon polymer, or (b) said implant species precursor gas comprises a hydride of a dopant species, said seasoning film precursor gas comprises a hydrocarbon gas and said seasoning film comprises a hydrocarbon polymer.