摘要:
A round heating plate for a heating chamber used in semiconductor device manufacturing provides uniform heating of the wafer from its center to its outside edges. The round heating plate includes a small-diameter round heating element and multiple ring-shaped elements arranged concentrically therewith. The round heating plate has the same shape as the wafer, and in the heating chamber, a pair of round heating plates is arranged so as to be concentric with a pair of wafers to be heated. During heating, the wafers are installed in a space formed between the heating plates.