Abstract: In an integrated circuit structure, such as in an MCM or in an SCM, a particulate thermally conductive conformable material, such as a thermal paste, is applied between a heat-generating chip and a cooling plate. Modification of the microstructure of at least one of the two nominally parallel surfaces which are in contact with the material is provided in a discrete pattern of sloped recesses. The largest particles in the material preferentially migrate downward into the recesses. The average thickness of the conductive paste is reduced to below the diameter of the largest particles dispersed in the material, providing improved cooling.
Type:
Grant
Filed:
December 27, 2002
Date of Patent:
August 10, 2004
Assignee:
International Business Machines Corporation
Inventors:
Evan George Colgan, John Harold Magerlein, Robert Luke Wisnieff, Jeffrey Allen Zitz