Unlike copper and aluminum metals that have high thermal expansion values, AlSiC has a low coefficient of thermal expansion (CTE). This minimizes thermally-induced stress, leading to a reduction in the failures of delamination and cracking, says CPS, which ultimately improves the reliability of the LED lamp. With a compatible CTE value, the need for thermal stress compensating interface layers is eliminated.
CPS' net-shape fabrication process both produces the composite material and fabricates its geometry, including through-hole and threaded hole features. This cost-effective process is claimed to allow tight tolerances without the need for expensive machining, and provides high volume assembly yields.
The unique casting process also enables integration of very high thermal conductivity inserts (>1000 W/mK) for high thermal dissipation solutions.
