Patent ID: 7888622
Filing Date: 2011-02-15
Classification: F27B,H01L,H05B,Y10T

Abstract:
1. A heat-processing furnace comprising: a processing vessel for housing an object to be processed to thermally heat the object to be processed; a cylindrical heat insulating member surrounding the processing vessel; a helical heating resistor disposed along an inner circumferential surface of the heat insulating member; support members axially disposed on the inner circumferential surface of the heat insulating member, for supporting the heating resistor at predetermined pitches; a plurality of terminal plates disposed radially outside the heating resistor at suitable intervals therebetween and attached to the heating resistor, the terminal plates radially passing through the heat insulating member to outside the heat insulating member; and a plurality of fixing plates disposed radially outside the heating resistor at suitable intervals therebetween and attached to the heating resistor, the fixing plates being fixed in the heat insulating member; wherein the fixing plates are attached to the heating resistor by the same attachment structure as the attachment structure of the terminal plates to the heating resistor, wherein the heating resistor includes pairs of end parts formed by severing a part of the heating resistor where the fixing plates and the terminal plates are attached, and by bending each end part to have an R-shape and to extend radially outwardly from the heat insulating member, and wherein opposite surfaces of each fixing plate and each terminal plate are sandwiched between opposing, severed bent parts of the heating resistor, and are fixed on such parts by welding.