Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With provision for cooling the housing or its contents
Patent
1996-08-30
1998-04-14
Saadat, Mahshid D.
Active solid-state devices (e.g., transistors, solid-state diode
Housing or package
With provision for cooling the housing or its contents
257706, 257718, 257720, 257796, H01L 2310, H01L 2334, H01L 2328
Patent
active
057395861
ABSTRACT:
A heat sink assembly includes a printed wiring board, a metal case and a circuit package containing a gallium arsenide field effect transistor heat dissipating circuit. The circuit package includes a metal slug formed integrally with the circuit package, the heat dissipating circuit being bonded to an obverse surface of the metal slug. The printed wiring board includes first and second metal lands, the first metal land being disposed on an obverse surface of the printed wiring board, the second metal land being disposed on a reverse surface of the printed wiring board. A solder film is formed bonded to and thermally coupling a reverse surface of the metal slug to the first metal land, and a plurality of solder posts are formed, each post bonding to and thermally coupling the first metal land to the second metal land. The metal case is pressed against the second metal land with a grease film of thermally conductive grease squeezed therebetween. At least one bolt extends through a hole in the printed wiring board and into the metal case so as to squeeze together the metal case, the printed wiring board, the first and second metal lands and the grease film.
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Alexander Ehnert, et al. "A New Surface Mount Power Package", IEEE Applied Power Electronic Conference, APEC '93 Mar. 7-11, 1993, pp. 380-384.
Cannizzaro Sharon M.
Terwilliger Libbie R.
Tunnell Timothy B.
Vaughn Wayne P.
Veneman Steven
Arroyo T. M.
Massaroni Kenneth M.
Pezdek John Victor
Saadat Mahshid D.
Scientific-Atlanta, Inc.
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