A 4.5-inch fully sealed carbon-nanotube field-emission display with a 200-m
u m narrow Sap was fabricated on glass using paste squeezing and surface ru
bbing techniques. The fabricated displays were fully scalable at low temper
atures below 415 degrees C and showed very high luminance of 1800 cd/m(2) a
t 4 V/mu m. The degradation of emission currents for single-wall carbon nan
otubes was less than 10% in electrical aging tests. Large field-enhancement
factors and low turn-on voltages (1.5-3 V/mu m) were attributed to well-al
igned carbon nanotubes on substrates and a large number density of carbon n
anotubes of 5-10/mu m(2), which was confirmed by high-resolution electron m
icroscopy. Although localized states exist for various tip morphologies, wh
ich was calculated by density-functional tight-binding calculations, the co
ntribution from such states was found to be negligible.