largersmall20 Layer 3+14+3 HDI

Product layer: 20L(3+14+3 HDI)

Thickness: 5.0

Surface finishing: Immersion Tin

Min trace width/spacing: 3.7 /3.7 mil
Finished copper thickness: 1oz
Min hole size: 0.25mm

Special requirement: Immersion Tin,4 times pressing,Impedance control