Ripple Pyrometry for Rapid Thermal Annealing

Abstract

ABSTRACTRipple pyrometry was proposed by Accufiber as a method for measuring wafer temperature in lamp-heated ovens. The technique obtains the wafer temperature from the wafer emittance radiation by simultaneously determining the effective emittance of the wafer and suppressing the interference from reflected lamp radiation. This paper reviews the technique for rapid thermal annealing and presents experimental results on silicon wafers instrumented with thermocouples and on processing blanket-film monitor wafers.