Patent ID: 7625205

Claim:
A heat treatment apparatus comprising: a reaction container for treating a substrate; a supporting tool for supporting the substrate in the reaction container; and a substrate transfer unit configured to transfer the substrate to the supporting tool, wherein the substrate transfer unit includes an arm portion that is adapted to support a peripheral portion of the substrate, the supporting tool includes a supporting portion which comes into contact with the substrate and a body portion for supporting the supporting portion, the supporting portion is formed of a plate member for supporting the substrate so as not to come into contact with the peripheral portion of the substrate and includes a non-contact portion at a center of a substrate placing plane of the plate member so as to communicate with an outside without being in contact with the substrate, and the surface area of the non-contact portion is set to a range between 25% and 94% inclusive of a surface area of an area surrounded by an outer edge line of the substrate placing plane of the plate member, and the substrate transfer unit transfers the substrate to the supporting tool at a velocity of 1 to 5 millimeters per second.