China PCB Product Highlights锛?br/> High precision and difficulty blind and buried hole board,Military board with Resin plugged hole or hole in BGA pad. Professional PCB engineer for one-to-one service PCB material guranteed Matte Dark Green (PANTONE 3537C) Product parameter锛?/strong> Layers18L HDI board MaterialFR-4 Thickness2.21mm +/-10% Surface processingENIG(2U") Copper thickness1 oz...