Patent ID: 7042148

Claim:
A field emission display baseplate comprising: a substrate having an upper surface; a plurality of spaced-apart conductors formed on the substrate; a plurality of spaced-apart emitter bodies comprising a high resistivity material formed on the conductors; a porous silicon dioxide layer including respective openings coaxial with the emitter bodies, the porous silicon dioxide layer disposed over and bonded to the upper surface of the substrate and the conductors, the porous silicon dioxide layer comprising about 22.5 to about 61.5 percent voids and a relative dielectric constant of less than three; an extraction grid formed on the porous silicon dioxide layer and including respective openings coaxial with the emitter bodies; and an emitter tip formed on each of the emitter bodies in the extraction grid opening, the tip formed from a material having a work function or electron affinity of less than four electron volts.