Tip Etching
W Tip Etching
Solution preparation:
NaOH+H2O
4g NaOH pallets dissolved in 50ml hot H2O around 60℃, swirl.
Caution: Crossive liquid. Strong base. Serious eye damage.
Disposal: Discard liquid in Green marked waste container at the left of chemical hood.
Etching Voltage: 4~2V DC Two Step
Ag Tip Etching
Solution preparation:
Base: NH3•H2O+H2O2+EtOH
mix roughly same volume of each components
Acid: HClO4+EtOH
mix roughly 1:3~1:5 perchloric acid into EtOH
Caution: Crossive liquid. Irritation. Acute Toxic. Oxidizing liquid. Strong Acid. Serious eye damage.
Warning: Using NH3•H2O may cause Ag precipitate on electrodes which causes short circuit. Be aware of etching process.
Disposal:
Base: Discard liquid in Green marked waste container at the left of chemical hood.
Acid: Discard liquid in Red marked waste container at the left of chemical hood.
Etching Voltage: 3V DC One Step, 0.001A shut. Or 20~30% Power, 1.5~2.3A AC