Layers: 18L
Product size: 220*330*2.8mm
Material: TU-872HF
Board Thicknes: 1.6±0.1 mm
Copper Thicknes: 35/18/18/35 um
Min.Trace/Space: 3.6/3.6mil
Min.Hole Size: 0.16mm
Surface Finsh: ENIG
Metallized holes
Plated Through Hole (abbreviated: PTH)
A hole with a metal layer deposited on its wall. It is mainly used for electrical connection of conductive patterns between layers.
Nonmetalizing pore
non Plated Through Hole(NPTH)
A hole without a metal layer in the wall, mainly used for installation and positioning.
Difference: there is copper on the hole wall is metallized through the hole, there is no metallized through the hole
