A reusable burn-in/test fixture for discrete TAB die consists of two halves. The first half of the test fixture is a die cavity plate for receiving semiconductor dice, and contains cavities in which die are inserted. The second half establishes electrical contact with the dice and with a burn-in oven....http://www.google.com/patents/US4899107?utm_source=gb-gplus-sharePatent US4899107 - Discrete die burn-in for nonpackaged die
