Patent ID: 9412670
Filing Date: 2016-08-09
CPC Classification: H01J,H01L

Claim Text:
1. Method of applying power to a target plasma chamber, comprising: characterizing a no plasma performance slope of the target plasma chamber, the target plasma chamber including a radio frequency (RF) electrode and a match circuit; applying a selected plasma recipe to a first wafer in the target chamber, the selected plasma recipe including a selected power set point value, wherein applying the selected plasma recipe includes monitoring a recipe factor value on the RF electrode during the application of the selected plasma recipe; receiving a no plasma performance slope of a reference chamber; generating a ratio of process efficiency comparing an efficiency of the reference chamber and an efficiency of the target chamber, the generating using as inputs the no plasma performance slope of the target chamber, the no plasma performance slope of the reference chamber and the monitored recipe factor value that is produced based on the selected power set point value, wherein the efficiency of the reference chamber being a function of the efficiency of the target chamber, the no plasma performance slope of the reference chamber, the selected power set point value and the monitored recipe factor value; calculating a compensation factor by multiplying the generated ratio with the selected power set point value; and applying the compensation factor to the selected power set point value to produce an adjusted power set point value, the adjusted power set point configured to cause power delivered to a plasma formed in the target chamber to match power that would be delivered to a reference plasma formed in the reference chamber; wherein the generated ratio does not require data from a monitored recipe in the reference chamber.