An apparatus for controlling the temperature of an electronic device under test includes a thermal head having a temperature controlled surface for making thermal contact with the electronic device. The thermal head defines a flow channel for passage of a refrigerant fluid so as to cause transfer of...http://www.google.co.uk/patents/US6668570?utm_source=gb-gplus-sharePatent US6668570 - Apparatus and method for controlling the temperature of an electronic device under test
