Patent ID: 7259580

Claim:
A method of testing, comprising: (a) electrically connecting chip pads on top surfaces of each integrated circuit chip of a multiplicity of integrated circuit chips to module pads on top surfaces of respective modules of a multiplicity of modules; after step (a), (b) dispensing a predetermined volume of polyalphaolefine oil on bottom surfaces of each integrated circuit chip of said multiplicity of integrated circuit chips; after step (b), (c) electrically connecting socket pads on bottom surfaces of each module of said multiplicity of modules to a respective socket electrically connected to a circuit board; after step (c), (d) placing said circuit board into an oven at a temperature above room temperature; after step (d), (e) pressing front surfaces of a multiplicity of heat sinks to bottom surfaces of respective integrated circuit chips of said multiplicity of integrated circuit chips, said pressing causing said volume of polyalphaolefine oil to form a heat transfer layer between bottom surfaces of said multiplicity of integrated circuit chip and front surfaces of said multiplicity of heat sinks, said multiplicity of heat sinks mounted to a rack in said oven; after step (e), (f) electrically testing said chips at a test temperature above room temperature, said liquid heat transfer layer being non-volatile and thermally stable at said test temperature; after step (f), (g) removing said heat sinks from contact with said heat transfer layer; after step (g), (h) removing said circuit board from said oven; after step (h), (i) removing said multiplicity of modules from said multiplicity of sockets; and after step (i), (h) removing any heat transfer layer remaining on said multiplicity of integrated circuits.