Title :
Isotherms in diamond heat sinks, non-linear heat transfer in an excellent heat condition
Author :
Doting, J. ; Molenaar, J.
Author_Institution :
Drukker Int. BV, Cuijk, Netherlands
Abstract :
A small fraction of all natural diamonds, called Type 2A diamonds, has a very low nitrogen content. In those diamonds thermal conductivity is primarily limited by carbon isotopes and dislocations. The heat conductivity at room temperature is typically 20 W/cm/°C, the highest value for any known material at room temperature, but its heat conductivity is a nonlinear function of temperature. The use of Type 2A diamonds at heat sinks for microwave oscillators or diode laser substrates is described. A mathematical model of a copper-supported diamond heat sink is developed using an iterative scheme to compute the temperature and flux distribution at the diamond-copper boundary. Example results for a surface-mounted heat sink are presented
Keywords :
diamond; heat sinks; heat transfer; iterative methods; microwave oscillators; semiconductor junction lasers; surface mount technology; thermal conductivity of solids; C; C-Cu; Type 2A diamonds; diamond heat sinks; diode laser substrates; dislocations; flux distribution; heat condition; heat conductivity; isotherms; iterative method; mathematical model; microwave oscillators; natural diamonds; nonlinear function; nonlinear heat transfer; surface-mounted heat sink; temperature; thermal conductivity; Conducting materials; Diamond-like carbon; Electromagnetic heating; Heat sinks; Heat transfer; Isotopes; Nitrogen; Optical materials; Temperature; Thermal conductivity;
Conference_Titel :
Semiconductor Thermal and Temperature Measurement Symposium, 1988. SEMI-THERM IV., Fourth Annual IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/SEMTHE.1988.10611
