AlSiC (Aluminum Silicon Carbide) is a metal matrix composite packaging solution for traditional hermetic packaging applications. Is said to have a lower density value – 1/5 to 1/6 lighter in weight than CuMo and CuW, respectively – yet similar thermal conductivity and expansion coefficient. Designs reportedly are cast to the final shape, requiring no secondary machining. Net-shape casting capability enables direct creation of functional design features, such as pockets for circulators and cavities or pedestals for the die. A hermetic package assembled with an AlSiC base brazed to an alloy 48 frame is hermetic to better than 10-9 atm-cm3/s. Is RoHS compliant.
 
CPS Technologies Corp., www.alsic.com
 
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