Multilayer Thin PCB 4-Layer/0.4mm Thick or 6-Layer/0.5mm Thick, HAL
Number of Layer:   2 íV 16 Layers (1.60mm thickness)
Solder Mask:   Taiyo PSR4000, Probimer 77, Sunchemical Imagecure íV Series
Peelable Mask:   Peters2955
Surface Finish:   Lead Free HAL, Tin-Lead HAL, Immersion Gold, Immersion Silver, Immersion Tin, Hard Gold, Flash Gold, OSP, Carbon Keypad, Gold Finger Plating.