To make clean glass substrates:

• Clean with acetone, methanol, ethanol and de-ionized water (in that order) by sonicating substrate for about five minutes in each.
• Dry completely using Nitrogen. Then dry for about ten minutes under UV lamp.

To make phosphor screen for field emission anode:

• Clean an ITO glass substrate using standard procedure.
• Mix appropriate amount of phosphor powder with colloidal silver liquid and mix in just a little bit of silver to get a paste of desired viscosity (so as to withstand the spin-coating). Place the clean ITO glass substrate on the spin-coater. Start spin-coater with vacuum turned on first for a few minutes.
• Once the ITO glass substrate adheres well to the spin-coater, add the phosphor paste to it.
• Run the spin-coater for a few minutes until an opaque film of phosphor is formed on the substrate.
• Anneal the ITO glass with the paste at 200ºC for 1 hour.

Note: If phosphor film does not turn out well, wash substrate with acetone and redo the above procedure.