<p>PROBING DEVICE A probing device includes a rack that has an outer support member supporting a circuit layer and a center support member supporting a probe assembly. When the tester touching down the circuit layer of the probing device from the top side, the outer support member of the rack bears this touchdown stress. When the probes of the probe holder touching down the electronic components of an IC wafer under test, the center support member of the rack bears the reaction force from the IC wafer.</p>
