Custom 4 layer fr-4 pcb circuit fr4 multilayer pcb pcba board manufacturing factory
Layer:4
Material: FR4
Thickness:1.0mm+/-10%
Solder Mask:immersion gold
Surface Finished: HASL
Copper Thickness:1 OZ
Drill hole(Min.):0.25mm
Min. line space: 0.15mm
Min. line width: 0.15mm