After all these years, the most satisfying thing is to make another difficult PCB.

Parameters: 10 layers, 3 order HDI, nickel palladium gold, resin plug hole, impedance plate, plate thickness 3.0

In all these years, the most exciting thing is that there is a PCB which cannot be made.

The day before yesterday, I received a 4-layer board, but I couldn't accept the order.The reason:must be 10uM (400u) 0.01mm of gold.