Patent ID: 7341673
Filing Date: 2008-03-11
Classification: G01K,H01J,H01L

Abstract:
1. In a plasma processing system, a method of determining a temperature of a substrate, comprising: providing a substrate; positioning said substrate on a substrate support structure, wherein said substrate support structure includes a chuck; flowing an etchant gas mixture into a plasma reactor of said plasma processing system; striking said etchant gas mixture to create a plasma; processing said substrate with said plasma; measuring, using a detector, a magnitude of emitted phonon-generated radiation of a select signal, said select signal having a select frequency that correspond to a frequency predetermined in advance based on material composition of said substrate to be strongly absorbed by said substrate during said processing; converting said magnitude of said emitted phonon-generated radiation of said select signal to a temperature value of said temperature; and protecting said detector from said plasma by positioning said substrate between said plasma and said detector.