Patent ID: 8535444
Filing Date: 2013-09-17
Classification: C23C,F27B,H01L,Y10T

Abstract:
1. A substrate processing apparatus comprising: a reaction vessel configured to process a substrate; and a heating device, wherein the heating device comprises: at least one sidewall insulating part surrounding the reaction vessel; a ceiling insulating part placed on the sidewall insulating part; and a heating element installed at an inner side of the sidewall insulating part, and wherein the ceiling insulating part is divided into a plurality of parts by a dividing line and comprises a plurality of stress relief grooves extending from a center of the ceiling insulating part to a circumference thereof, each of the plurality of stress relief grooves having a depth with respect to a bottom surface of the ceiling insulating part without penetrating the ceiling insulating part and without dividing the ceiling insulating part into the plurality of parts.