6-layer

 Laminate: FR4 Tg170

 
Board thickness: 1.6mm (.062-inch)
 
Copper thickness: 35um (1oz) copper for all layers after finish
 
Copper wall in the hole: 20um (0.8 mil)
 
Solder resist: SMOBC Glossy Green
 
Finish:
 
Immersion gold Ni: 3 to 5um
 
Au: 0.05um (Ni: 120 micro inch/Au: 2 micro inch)
 
Trace width/width: 0.076/0.076mm (3/3 mil)