Patent ID: 7311520
Filing Date: 2007-12-25
Classification: H01L

Abstract:
1. A thermal processing unit comprising: a heating-furnace body whose upper end has an opening, a reaction tube consisting of a single tube contained in the heating-furnace body, a gas-discharging-unit connecting portion formed at an upper portion of the reaction tube, the gas-discharging-unit connecting portion having a narrow diameter, a substrate-to-be-processed supporting member for supporting a substrate to be processed, contained in the heating-furnace body, and a heating unit for heating the substrate to be processed supported by the substrate-to-be-processed supporting member, wherein the heating unit has: a first heating portion arranged around the reaction tube, a second heating portion arranged around the gas-discharging-unit connecting portion, a third heating portion arranged around an upper portion of the reaction tube, a fourth heating portion arranged around a lower portion of the reaction tube, and a fifth heating portion arranged under the substrate-to-be-processed supporting member, wherein the first heating portion is formed by a plurality of linear heat-generating members, which are arranged in parallel with a longitudinal direction of the reaction tube.