Patent ID: 6461428
Filing Date: 2002-10-08
Classification: C23C,C30B

Abstract:
A method of controlling a rise and fall of the temperature in a semiconductor substrate comprising the steps of:providing one or a plurality of temperature control programs in advance adaptable for a variety of semiconductor substrates having different temperature rise/fall characteristics in preparation for the case where the control of a rising and falling temperature in the semiconductor substrate is subjected to an oxidation, diffusion, or chemical vapor deposition process; measuring temperatures in a plurality of locations in said semiconductor substrate after the semiconductor substrate is fed into a heated reactor to obtain measured values; computing a rate of temperature rise and a distribution range of in-plane temperatures thereof out of said measured values to determine a temperature rise/fall characteristic thereof; automatically selecting a temperature control program adaptable for said determined temperature rise/fall characteristic out of said one or a plurality of temperature control programs; and controlling the rise and fall of said semiconductor substrate temperature on the basis of said selected temperature control program.