R-579Y(U)

The R-579Y from Panasonic is a Multilayer PCB Laminate Material that is designed to have ultra-low transmission loss and be highly heat-resistant. It has a glass transition temperature of 220°C and a thermal decomposition temperature of 370°C. This laminate material has a CTE ranging from 17-20 ppm/°C for the X & Y axes and 50 to 270 ppm/°C for the Z-axis as per IPC-TM-650 2.4.24 specifications. It is available in two variants - R-579Y(N) Low-Dk glass with a dielectric constant (Dk) of 3.13 & a dissipation factor (Df) of 0.0016 and R-579Y(U) Ultra Low-Df glass with a Dk of 3.08 & a Df of 0.0012. This laminate material has a very low water absorption rate of 0.06% and meets the UL 94V-0 flammability test standard.