1) L1 and L4, track /space(mil) 5.1/6, precision +/-10% 90 ohm differential impedance L1, L2 and L4, track /space(mil) 6.1/7.8, precision +/-10% 100 ohm differential impedance 2). 230*230mm/1up, FR-4 Tg 170 3). 4 layers, 35 μm copper, 2.5mm thick 4). Min.track/space: 4/4 mil 5). Min. hole size: 0.25mm 6). Immersion gold 7). High power electronics