Patent ID: 8013748

Claim:
A method for monitoring temperature and slope of a wafer, the steps of the method comprises: (a) providing (1) a cooling machine including a rotatable cooling module and a fixing module on the rotatable cooling module; (2) a sensing module including: a first sensing unit arranged in the rotatable cooling module; and a second sensing unit arranged on the fixing module; (3) a monitoring system; (b) cooling the wafer on the rotatable cooling module; (c) sensing the temperature and the slope of the wafer by the first sensing unit and the second sensing unit; (d) forming a sensor signal from the first sensing unit and the second sensing unit, and according to the sensor signal, (e1) outputting a first alarm signal from the monitoring system if the temperature of the wafer is higher than a set temperature established by the monitoring system; (e2) outputting a second alarm signal from the monitoring system if the slope of the wafer is greater than a set slope established by the monitoring system; and (e3) outputting a third alarm signal from the monitoring system if the temperature and the slope of the wafer do not conform to the set temperature and the set slope established by the monitoring system.