... : ENIG: Au: 0.03-0.09um, Ni: 2-6um Minimum via diameter: 0.2mm The smallest hole: 0.35mm Outline Tolerance ... , Multi-layer FPC, EM-shielding FPC, Finger-impending FPC, Special R/I FPC, Irregular-shape FPC, Regular FPC, multilayer PCB, printed circuit ...