|
Numerous wireless devices depend on GaAs MESFET RF amplifiers. These amplifiers, or
Gallium Arsenide (GaAs) Metal Semiconductor Field Effect Transistor (MESFET) Radio
Frequency amplifiers, are used extensively in both consumer handsets and industry
infrastructure for cellular, pager, radar, and other wireless communications. The
market for cellular telephony in particular has boomed. Demand for new cellular
handsets is currently above 40% per year, and CIBC World Markets estimates almost
600 million unit shipments in the year 2004. Enerdyne's Polara allows significant
improvement of thermal performance in these devices.
With funding from the Washington Technology Center (WTC) and collaboration with
faculty at Washington State University (WSU), Polara modeling exhibits a decrease
in junction temperature by 30ºC or more. That means a twofold increase in thermal
performance of GaAs RF amplifiers. Additionally, Polara matches the CTE of GaAs,
ensuring reliability. Greater thermal performance extends operating lifetimes,
improves reliability of operation, and allows size decreases since transistors
can sit closer together. It enables desirable weight and cost reductions. Diamond
heat spreaders, for instance, are five times as expensive.
Consumers want cell phones that are powerful, portable, and operate for extended
lengths of time with minimal recharging. Polara's integrated cooling upon the
substrates of RF amplifiers allows smaller chip areas, and thus more chips per
wafer, without sacrificing cost or battery life.
| |