Aluminum nitride 
 Aluminum nitride ceramic with excellent thermal conductivity (5-10 times that of alumina ceramic), low dielectric constant and dielectric loss, reliable insulation performance, good mechanical properties, non-toxic, high temperature resistance, chemical corrosion with similar thermal expansion coefficient of silicon as a new generation of ceramic materials, more and more people concern and attention. Our production of aluminum nitride ceramics, the quality leader in the domestic similar products, with international advanced level, are widely used in communications devices, high-brightness LEDs, power electronic devices industry. 
 1013 dielectric constant of the AlN ceramic substrate content of the performance of key performance indicators, performance indicators: the thermal conductivity (W / m · k) ≥ 170 Volume resistivity (Ω · cm)> [1MHz, 25 ° C] 9 Dielectric loss [1MHz 25 ° C]-4 3.8х10, electric strength (KV / mm) 17 bulk density (g/cm3) ≥ 3.30, the surface roughness Ra (μm) 0.3 ~ 0.5, the thermal expansion coefficient of 20 ℃ to 300 ℃ (10 -6 / ° C) 4.6, the bending strength (MPa), 320 ~ 330, elastic modulus (GPa), 310 ~ 320, Mohs hardness, water absorption (%) 0, warping (~ / 25 (length ) 0.03 to 0.05, melting point: 2500, appearance / color: gray