Microwave monolithic integrated circuit assembly with multi-orientation pyrolytic graphite heat-dissipating assembly
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United States of America Patent
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Dec 9, 2003
Grant Date -
Sep 18, 2003
app pub date -
Mar 13, 2002
filing date -
Mar 13, 2002
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Abstract
A microwave monolithic integrated circuit assembly includes a microwave monolithic integrated circuit having an MMIC circuit plane and having a first region of relatively high heat production and a second region of relatively low heat production. A heat-dissipating assembly is in thermal contact with the microwave monolithic integrated circuit. The heat-dissipating assembly has at least two pieces of pyrolytic graphite embedded within a casing. The pieces of pyrolytic graphite include a first piece of pyrolytic graphite underlying the first region and having a high-thermal-conductivity x-direction of the first piece lying within about 20 degrees of a perpendicular to the MMIC circuit plane, and a second piece of pyrolytic graphite underlying the second region and having a high-thermal-conductivity x-direction of the second piece lying within about 20 degrees of the MMIC circuit plane. The heat-dissipating assembly is preferably fabricated by hot isostatic pressing.
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