Patent ID: 8124168
Filing Date: 2012-02-28
Classification: C23C,H01L

Abstract:
1. A substrate processing method for performing a target processing on a substrate mounted on a susceptor in a processing chamber at one of various set temperatures, comprising: irradiating infrared rays to the substrate and receiving infrared rays reflected from or transmitted through the substrate to measure a thermal characteristic of the substrate, the thermal characteristic being a single value of infrared transmittance or infrared absorptance for the whole substrate, wherein the irradiating and the receiving the infrared rays are performed outside the processing chamber; determining an output ratio of an output of at least one of the plurality of heaters to an output of at least another one of the plurality of heaters for said one of the set temperatures based on the measured thermal characteristic, the heaters being disposed to correspond to plural regions of the substrate, wherein the output ratio of the heaters is determined by using a table which has relationships between thermal characteristics of the substrate and output ratios of the heaters for each of the set temperatures, wherein each relationship in the table associates a respective single value of the thermal characteristic of the whole substrate to a respective output ratio of an output of at least one of the plurality of heaters to an output of at least another one of the plurality of heaters; and heating the substrate in the processing chamber by controlling outputs of the heaters based on the determined output ratio, wherein the outputs of the heaters are controlled, while maintaining the determined output ratio, based on the difference between said one of the set temperatures and a temperature measured by only one temperature detector provided at a region of the susceptor corresponding to only one of the plural regions of the substrate.