Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With provision for cooling the housing or its contents
Patent
1990-01-31
1993-05-25
James, Andrew J.
Active solid-state devices (e.g., transistors, solid-state diode
Housing or package
With provision for cooling the housing or its contents
257713, 257718, 257719, 333246, 333247, 361380, 361381, 361386, 361389, H01L 2302, H02B 100, H05K 720, H01P 308
Patent
active
052143090
ABSTRACT:
A cooling structure for a high frequency power transistor is mounted on a circuit board where heat generated by the transistor is conducted from the semiconductor material through the collector conductor. A metal piece, which is larger than the collector conductor and sized to the requirements of heat removal through the collector conductor, contacts the collector conductor or an extension. The metal piece is solidly attached to a conductor strip formed on the circuit board. Heat is dissipated from the exposed surface of the metal piece to the ambient air and by conduction to the circuit board.
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patent: 3517272 (1970-06-01), Lee et al.
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patent: 3982271 (1976-09-01), Olivieri et al.
patent: 4030001 (1977-06-01), Medley, Jr. et al.
patent: 4720742 (1988-01-01), Egawa et al.
patent: 4950427 (1990-08-01), Endo
patent: 5012322 (1991-04-01), Guillotte et al.
European Search Report, Application No. EP 90 10 2984.
James Andrew J.
Jr. Carl Whitehead
Nokia Mobile Phones Ltd.
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