A field emission device includes a substrate and a plurality of wires embedded in the substrate. The plurality of wires has at least a field emitter cathode wire; a control grid wire array; and a collector anode array. The field emitter cathode wire, control grid wire array, and collector anode array are embedded in and extend through a nonconductive substrate matrix. A method for making a vacuum field emission device is also disclosed.
STATEMENT AS TO FEDERALLY SPONSORED RESEARCH
 This invention was made with government support under contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in this invention.