Patent ID: 7888951

Claim:
A thermally-controllable integrated unit configured to hold at least one device under test (DUT), comprising: at least one heater board, comprised of a thermally-conductive material and provided with at least one global heater printed on the at least one heater board, the at least one global heater being configured to globally heat a DUT board; and the DUT board in thermal contact with the at least one heater board, the DUT board including a plurality of sockets, each socket configured to hold at least one DUT, and the DUT board having conductor paths to conduct electrical signals between test equipment and the terminals of DUTs in the sockets, each socket including an associated temperature sensor and a separately controllable local heater configured to, based on a temperature indication from the temperature sensor, activate the local heater for that socket to heat the at least one DUT in that socket, wherein the local heater is a printed heating element.