Patent ID: 7718930

Claim:
A support table structure comprising: a support table, for supporting a workpiece thereon to subject the workpiece to a predetermined thermal process in a processing vessel, provided with a heating means for heating the workpiece; and a support post standing on the bottom of the processing vessel and supporting the support table, characterized by a heat-resistant upper surface covering member, a heat-resistant side surface covering member and a heat-resistant lower surface covering member respectively covering an upper, a side and a lower surface of the support table, and a heat-resistant, opaque back cover disposed under the lower surface of the support table, an upper surface of a peripheral part of the upper surface covering member is contiguously covered with a part of the side surface covering member, the peripheral part of the upper surface covering member being connected with the side surface covering member so as to enclose the heating means, the lower surface covering member covers the lower surface of the opaque back cover, and the covering members excluding the upper surface covering member and the opaque back cover are made of transparent quartz glass, and the surfaces of the covering members made of transparent quartz glass are finished by a surface roughening process to prevent films deposited thereon from peeling off.