Patent ID: 7479619
Filing Date: 2009-01-20
Classification: H01L

Abstract:
1. A thermal processing unit comprising: a heating-furnace body whose upper end has an opening, a furnace-body lid provided at the opening of the heating-furnace body, a first heating unit provided on an inside wall of the heating-furnace body, a reaction container consisting of a single tube contained in the heating-furnace body, a gas-discharging-pipe connecting portion formed at an upper portion of the reaction container and penetrating the furnace-body lid, and a first temperature controlling unit provided around the gas-discharging-pipe connecting portion, wherein the gas-discharging-pipe connecting portion has a cervical portion whose diameter gradually reduces from a diameter at an upper portion of the reaction container, a second heating unit is provided in a vicinity of the cervical portion of the gas-discharging-pipe connecting portion, the gas-discharging-pipe connecting portion is bent at an angle of about 90 degrees, a gas-discharging pipe for discharging atmosphere in the reaction container is connected to the gas-discharging-pipe connecting portion, a second temperature controlling unit is provided around the gas-discharging pipe, a third heating unit is provided in a vicinity of the upper portion of the reaction container, a fourth heating unit is provided in a vicinity of a lower portion of the reaction container, and the first heating unit, the second heating unit, the third heating unit, the fourth heating unit, the first temperature controlling unit and the second temperature controlling unit are adapted to be controlled independently.