Patent ID: 8168519
Filing Date: 2012-05-01
Classification: C23C,H01J,H01L

Abstract:
1. A method of performing plasma immersion ion implantation on a semiconductor workpiece in a plasma reactor chamber, comprising: prior to introducing the workpiece into the reactor, depositing a partially conductive seasoning film on interior surfaces of said chamber, said seasoning film comprising silicon, oxygen and hydrogen and having a silicon content of between 70% and 85%; electrostatically clamping the workpiece on a workpiece support surface in the reactor chamber by applying an electrostatic clamping voltage; generating a plasma in the chamber from a process gas containing species to be ion implanted in the workpiece by coupling RF plasma source power from an RF source power generator to said process gas; applying RF bias power from an RF bias power generator to a disk-shaped electrode underlying and insulated from the workpiece; and removing said workpiece by turning off said clamping voltage, waiting for electrical discharge of said workpiece through a portion of said seasoning film covering said workpiece support surface, and thereafter lifting said workpiece from said workpiece support surface.