The RO4003C from Rogers Corporation is a Laminate with Dk (Dielectric Constant) 4, Tg >280 °C, Thickness Inches 0.008” (0.203mm), 0.012 (0.305mm), 0.016”(0.406mm), 0.020” (0.508mm) 0.032” (0.813mm), 0.060” (1.524mm), Thermal Coeffecient 14 ppm/°C, Thermal Conductivity 0.95 W/m/K. More details for RO4003C can be seen below.