Patent ID: 8222569

Claim:
A heat-treating apparatus for heat-treating a substrate, said heat-treating apparatus comprising: a heating plate capable of supporting a substrate thereon and provided with a heating member; a cooling gas jetting member provided with plural gas jetting holes arranged along the circumference of the heating plate to jet a cooling gas for cooling the heating plate so that the cooling gas flows from the circumference toward the center of the lower surface of the heating plate; a straightening plate disposed opposite to the heating plate under the heating plate close to the heating plate to straighten the flow of the cooling gas under the heating plate, and provided with an exhaust opening in a central part thereof; and a member surrounding the gas jetting member and the straightening plate so as to define an air suction space through which an atmosphere external to the heat treating apparatus is sucked into a space between the heating plate and the straightening plate by the vacuum created by the flow of the cooling gas.