Patent ID: 8107801

Claim:
A heat treatment apparatus for performing a specified heat treatment on a target object, comprising: an evacuable processing chamber; a mounting table on which the target object is mounted, the mounting table being disposed in the processing chamber; a lower heating unit for heating the target object, the lower heating unit being disposed in the mounting table or below the mounting table; a light transmitting window for airtightly covering a ceiling portion of the processing chamber; a gas introduction unit for introducing a required gas into the processing chamber; and a heating unit for emitting light for heating to the target object through the light transmitting window, the heating unit being disposed above the light transmitting window and having a plurality of heating sources each of which includes a semiconductor light emitting element, wherein each of the heating sources includes an element attachment rod having a heat pipe, and each of the semiconductor light emitting elements is attached to an end portion of the corresponding element attachment rod, and wherein the heating unit includes an element attachment housing to cover a top portion of the light transmitting window, and a base portion of each of the element attachment rod is supported by the element attachment housing.