Immersion silver pcb Technical description: Layer:12 Materialfr4 Board thickness: 1.6mm Surface finishflash gold Min through hole0.1mm(4mil) Min line width0.075mm3mil) Min line space0.1mm(4mil) Special requirementsburied and blind via +controlled impedance Rohs H.C.C. International limited has established itself as not only a manufacturer of large volume of pcbs, pcba, fpc etc, but also as a manufacturer of world competitive, high quality, best service, small to large volume production quantities. We specialize in manufacturing multilayer, double sided and single sided printed circuit boards with finishing of hal, lead-free hal, flash gold, immersion gold, carbon print and immersion silver etc. We manufacture pcbs to customers in worldwide, include europe, china, australia, and usa, middle east etc. Standard export package