Silver board dedicated specifically for rigid printed circuit board Ag conductor is designed in such as phenolic board (phenolic paper), epoxy resin board and its copper film. Typical use: 1) Silver Call (SILVER CONDUCTIVE JUMPERS), silver wire, silver buttons. 2) screen printing double-sided through-hole (SILVER THROUGH HOLES, referred to as STH). Phenolic Cardboard (FR2), epoxy resin board (FR3) and glass fiber epoxy board (FR4) and copper film has excellent adhesion to, the general anti-welding and peelable adhesive ink can be used for its , it can be had and can withstand soldering furnace circuit board commonly used solvents.