Apparatus and method for sensing defects in temperature sensors

Thermal measuring and testing – Thermal calibration system

Reexamination Certificate

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C374S141000, C340S653000

Reexamination Certificate

active

07018093

ABSTRACT:
In a temperature controlling apparatus for controlling temperature by using a temperature sensor, a defect state of the temperature sensor is sensed by sensing a change of specific resistance of the temperature sensor. A temperature value of the temperature sensor is detected at each unit time during exchanging of a chemical solution or stopping of a process in a chamber of the semiconductor fabricating process. A lowest temperature among the detected temperature values and a reference temperature predetermined to sense the change of the specific resistance of the temperature sensor, are compared with each other. When the lowest temperature deviates from the reference temperature, a defect of the temperature sensor is confirmed and a message indicative of a defect state and an alarm are generated.

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