Sheet type heat treating apparatus and method for processing semiconductors

A single substrate thermal processing apparatus for subjecting a target substrate to a plurality of semiconductor processes having different process temperatures, comprising:

• a process chamber configured to accommodate a target substrate;
• a supply system configured to supply a process gas into the process chamber, the supply system including a showerhead, which is disposed on a ceiling of the process chamber and has a bottom surface with a plurality of spouting holes for spouting a process gas;
• an exhaust system configured to vacuum-exhaust the process chamber;
• a support member configured to support the target substrate to face the showerhead in the process chamber when the target substrate is subjected to the semiconductor processes;
• a heating lamp disposed below the support member, and configured to emit light to heat the target substrate;
• and
• an elevator mechanism configured to move the support member and the heating lamp up and down together relative to the showerhead, the elevator mechanism being configured to set different distances between the showerhead and the heating lamp, in accordance with the different process temperatures, thereby causing temperature change of the bottom surface of the showerhead to fall in a predetermined range.