... 2OZ copper size finished Hasl Lead Free Good quality High technology decide China PCBBasic electronic parameters:1. Manufacturer: ... circuit boards(up to 40L), an some high end boards, e.g. high-frequency circuit boards, HDL boards with Buried & ... , German Flying Probe Testers and other advanced equipments, and High Frequency Board manufacturing, Special Impedance Control, Buried & Blind Via ...