Patent ID: 11927394
Assignee: TOKYO ELECTRON LIMITED
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. A heat treatment method of a heat treatment apparatus including: a heater configured to heat a vertically long process chamber; and a cooler configured to cool the process chamber, the cooler including a plurality of discharge holes provided at intervals along a longitudinal direction of the process chamber to discharge cooling fluid toward the process chamber; and a plurality of shutters provided corresponding to the plurality of discharge holes, the heat treatment method comprising:
performing a heat treatment in the process chamber in a state where at least one of the plurality of shutters is moved to an open position and a remainder of the plurality of shutters is moved to a closed position,
wherein the performing of the heat treatment includes moving at least a shutter at a top portion among the plurality of shutters to the open position independently of other shutters.