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Plochingen, 2010-10-21

Extruded Alunit Ceramics – World Premiere

CeramTec GmbH has succeeded in achieving series extrusion of exceptionally thermally conductive aluminum nitride ceramics. This process is the world's first and enables rod-shaped bodies and tube systems made of ceramic with a thermal conductivity of ≥ 200 W/mK, high mechanical stability and dielectric strength. The production phase enables technical reproducibility along with an efficient manufacturing method even for large quantities. Currently, diameters of 0.98mm to approx. 35mm are possible. The minimum wall thickness is 0.2mm; the maximum length is 250mm. With approx. 4.1 ppm/K, Alunit has a thermal expansion coefficient rivaling that of silicon (approx. 4 ppm/K) and also exhibits uniform thermal conductivity and expansion in all directions. It produces virtually no thermal stress in the soldering layer between the chip and the substrate.

AIN ceramics boast a wide range of applications - from passive components and module substrates to liquid cooling. Pairing these properties with a direct metallization, a patented method developed by CeramTec GmbH, brings even more advantages to the areas of thermal management, electrical insulation and system reliability.