The emission of different, diamond coatings on silicon field emitter. array
s were investigated: chemical vapor deposition diamond, high pressure and h
igh temperature synthetic diamond, and shock-synthesized nanodiamond. Pract
ical emission characteristics such as: emission threshold, maximum current,
current stability, and reproducibility were tested. The effects of surface
modification, the size of diamond crystallites, and hydrogen plasma treatm
ents were also studied. (C) 1999 American Vacuum Society. [S0734-211X(99)06
102-8].