Patent ID: 7271604

Claim:
Method for testing semiconductor wafers by means of a temperature-regulated chuck device, comprising the following steps: controlling a temperature of the chuck device to a predetermined measurement temperature by means of a heating device having a predefined heating power and a cooling device having a predefined cooling capacity, the heating power being substantially greater than a predefined testing power; laying a rear side of a semiconductor wafer on a supporting side of the temperature-regulated chuck device; placing a probe card on a front side of the semiconductor wafer; testing the semiconductor wafer by impressing the testing power from a testing apparatus into a chip region of the front side of the semiconductor wafer by means of probes of the probe card placed thereon; reducing the heating power by the amount of the testing power during the testing with a substantially constant cooling capacity; characterized in that the testing power is predefined while taking account of the signals from a second and third temperature registering device, which register the input temperature and the output temperature, respectively, of a fluid supplied to the chuck device by the cooling device for the purpose of cooling during the testing.