This is a 14 layer circuit board for Intel PCIE board. The PCB with hard gold finish(gold finger). The PCB use Low transmission loss Highly heat resistant Multi-layer circuit board materials MEGTRON4 R-5725 from Panasonic. Dk 3.8 Df 0.007 @10GHz, tg 176°C. The laminate widely used in ICT infrastructure equipment, Supercomputer, Measuring instrument, Antenna, Etc.