The Definitive Guide to 16-Layer 5-Order HDI High-Frequency Storage Server PCB
Electroplated nickel gold is more frequently made use of on IC substrates (like PBGA), mostly for binding gold wires and copper wires; but when electroplating C substrates, more conductive wires should be built in the gold finger binding spot ahead of electroplating.In short, the four-layer board has an inner layer. When it comes to the method,