Metal Backed Printed Circuit Boards are available in a single layer construction. These Printed Circuit Boards are offered with a thickness of 0.8 to 3.2mm with 2 Oz. Copper finish These Printed Circuit Boards are provided with minimum drilled hole of 0.35mm and punched hole of 0.9mm. Metal Backed Printed Circuit Boards are available in a line width and spacing of 6/ 6 mils.