Multilayer PCB up-to 24 layer

The printed circuit boards are available in various technical specifications and some of them are:

Hot air solder leveling (HASL) Tin lead (Non Rohs-compliant)
Electro less nickel
Immersion Gold / ENIG
Immersion TIN

Lead Free HASL

Photo image able solder resist in various colors (green, red, blue, white)
various colors (white, black, yellow)

Component notation (silkscreen legend) two pack epoxy