Surface Finishing:Leed free HASL
Through-hole:0.30mm Buried hole:/
Blind hole:/ Copper Thickness:1oz
Layer:2 Board Thickness:1.6mm
Min. Line Spacing:0.12mm Min. Line Width:0.12mm
Min. Hole Size:0.25mm
Multi Layer PCB have more layer than double side PCB, it has many circuit layer between Top side and Bottom side of PCB and also each layer can connect with via PTH (Plated Through Hole), this type is more complex than double side PCB.