... manufacturing PCB. This enables us to produce electric circuit boards of 1-12 layers utilizing skills in electro-tinning, gold-gilding, gold ... of 500,000 square feet. (3) Specifications ProductSingle sided to 12 layers PCBMaterialFR1, FR2, CEM1, CEM3, FR4, BTBoard thickness0.4mm to ... inkMax. panel size508mm x 610mmBow & twist0.7% (1.5mm board)Hole size tol.PTH: +/-0.08mm, NPTH: +/-0.05mmHole location ...