Layer: Single-SidedMin Holes:2.00mmSurface Treatment:HAL ROHS/OSPSolder mask:Black Silk screen :White Board Thickness: 1.6mm Cu Thickness: 70um Aluminium Model: 5052 Thermal Conductivity: 200W/m. K Breakdown Voltage: AC<2KV-4KV DC>2KV-7KV