Patent ID: 8080767

Claim:
A thermal processing apparatus comprising: a processing vessel capable of being evacuated, the processing vessel also being capable of accommodating, in addition to a plurality of objects to be processed, an object for temperature measurement equipped with an acoustic wave device; a holding unit configured to be loaded into and unloaded from the processing vessel, while holding the plurality of objects to be processed and the object for temperature measurement; a gas introduction unit configured to introduce a gas into the processing vessel; a heating unit configured to heat the plurality of objects to be processed and the object for temperature measurement that are accommodated in the processing vessel; a first conductive member configured to function as a transmitter antenna connected to a transmitter through a radiofrequency line, for transmitting an electromagnetic wave for measurement toward the acoustic wave device accommodated in the processing vessel; a second conductive member configured to function as a receiver antenna connected to a receiver through a radiofrequency line, for receiving an electromagnetic wave dependent on a temperature of the acoustic wave device which is emitted from the acoustic wave device accommodated in the processing vessel; a temperature analysis part configured to obtain a temperature of the object for temperature measurement based on the electromagnetic wave received by the receiver antenna; and a temperature control part configured to control the heating unit; wherein: the first conductive member is disposed as a part of a thermal processing part in the processing vessel; the second conductive member is disposed as a part of a thermal processing part in the processing vessel; and the radiofrequency line is provided with a radiofrequency filter part that transmits a radiofrequency component but cuts a low frequency component and a direct-current component.