48 layers PCB

multilayer

PCB with imedance control, oem pcb board manufacturer china, pcb manufacturer in china materials: M7NE Board thickness: 8.0+/-0.8mm Finishing Size: 870x500mm Min Line w/s: 5/5mil Min drill size [FHS/DHS] : 0.34mm/0.45mm Plating AR DHS : 18:1 Surface finish: ENIG Structure: 1+N+2+N+1 Other : Press fit blind via hole Impedance Tol: +/-8% Press fit hole location Tol: +/- 1mil (At one connecter) COPPER PLATE HOLES MINIMUM .025 AVG, .020 MIN.. HOLES MAY NOT BE PLUGGED Special requirement:ENIG, Impedance: Tol: +/-7%, Press fit hole Pack with colorless transparent bubble film ,25 PCS/ bag, put desiccant in flank, put humidity indicator card on top side