Patent ID: 7535243

Claim:
A control method that switches between first and second measuring means connected to switching means in order to measure multiple types of electronic characteristics of a device under test which is a semiconductor device, the control method comprising the steps of: (a) causing the switching means to electrically disconnect the device under test from the second measuring means and electrically connect the device under test to the first measuring means; (b) causing the first measuring means to apply a voltage to the device under test via the switching means for measuring a first electronic characteristic of the device under test and, while causing the first measuring means to apply the voltage to the device under test, maintaining an output voltage of the second measuring means to match an output voltage of the first measuring means; (c) causing the switching means to electrically disconnect the device under test from the first measuring means and electrically connect the device under test to the second measuring means; and (d) causing the second measuring means to measure a second electronic characteristic of the device under test.