Specification :

1) . 1+ C+ 1 HDI, buried/ blind L1-L5/ L5-L8 vias.
2) . FR-4 Material, 1 oz weight.
3) . 8 layer, 1.6mm thick.
4) . 4/ 4 mils track and space
5) . Min.drill 0.1mm
6) . Green solder mask/ white silkscreen
7) . Immersion gold over nickel