4 Layer Blind and Barried PCB

After years of continued innovation and development from year 2008, we now have set a pcb business unit and an fpc board business unit. We have ability to build pcb design, pcb manufacturing, pcb smt assembly one-stop source.there are professional engineers, salesman and good-quality waiting for you.it is 4 layer hdi pcb  and the min trace and space just 0.08/0.08m,we offer most of hdi pcbs to oregon state university.they have many hdi and special pcb need to do.our high quality have won more projects for their  universtity. Pcb features: 1.layer: 42.material: fr43.thickness: 1.6mm4.copper: 1oz5.mini hole: 0.15mm6.mini width/space: 0.08mm/0.08mm7.finish: immersion gold8.hdi:top-inner2our manufacturing capability:manufacture capability layers: 1-32 layersmaterials: cem1, cem3, teflon, rogers, fr-4, high tg fr-4, aluminum base, halogen freemax board size: 510*1200mmmaterial: rohs directive-compliantpcb thickness: 1.6mm-6.4mmout layer copper thickness: 1-6ozinner layer copper thickness: 1oz-12ozmax board thickness: 6.0mmminimum hole size: 0.150mmminimum line width/space: 3/3milmin s/m pitch: 0.1mm (4mil)plate thickness and aperture ratio: 12:1minimum hole copper: 20μmhole diameter tolerance (pth): ±0.075mm (3mil)hole diameter tolerance (npth): ±0.05mm (2mil)hole position deviation: ±0.05mm (2mil)outline tolerance: ±0.05mm (2mil)surface finish: hasl leadfree, immersion enig, chem tin, flash gold, osp, gold finger, peelable, immersion silver,enepigsolder mask: