Patent ID: 7695984
Filing Date: 2010-04-13
Classification: H01J,H01L

Abstract:
1. A method for processing a semiconductor device using an end-point detection process, the method comprising: providing a semiconductor wafer having a film to be processed; processing the film in a plasma environment during a determined time period; collecting information associated with the plasma environment during the determined time period, the information being characterized by a first signal intensity selected from an intensity of an RF signal, a light signal, a temperature signal, a pressure signal, a voltage signal, or a gas composition signal; extracting a change in signal intensity from the first signal intensity, the change in signal intensity having a second signal intensity; associating the change in signal intensity at the second intensity with an end point associated with the processing of the film in the plasma environment; whereupon the second signal intensity is about 0.25% or less of the first signal intensity.