Product name: 12 layer 4-step HDI boards
Board Material：TU-872SLK
Board Thickness：1.0mm
Layer Number：12 layers PCB
Minimum line width/spacing: 2.5/2.5mil
Finished copper thickness: inner layer 0.5OZ, outer layer 1OZ
Acceptance standard: IPC6012 CLASS 3 level
Surface technology: gold immersion + gold finger plating
Dielectric constant: 3.5
Loss factor: 0.008
Usage: Industrial automation
