Burn-in system with heating blocks accommodated in cooling blocks

A burn-in system for conducting a burn-in test on a plurality of devices under test mounted on a burn-in board, comprising:

• heating blocks having heating means for heating said devices;
• cooling blocks formed with channels able to carry a coolant for cooling said devices under test;
• bringing said heating blocks and said cooling blocks into contact with said devices under test and simultaneously conducting a burn-in test on said plurality of devices under test;
• each of said cooling blocks is formed with a first accommodating space for accommodating one heating block,
• each of said heating blocks is accommodated in a corresponding said first accommodating space with a layer of air formed between said heating block and said cooling block so as to be insulated from said cooling block;
• temperature adjustment boards supporting a plurality of said cooling blocks at a frame with mechanical floating and
• a burn-in chamber able to hold each burn-in board and having said temperature adjustment boards, and
• said each temperature adjustment board being provided in said burn-in chamber so that said each cooling block faces a device under test mounted on said burn-in board.