Emission characteristics of Spindt-type field emitter arrays in oxygen ambient

We have examined endurance of Spindt-type field emitter arrays (FEAs) again st oxygen ambient. In this study,: the endurance of four different emitter materials, Ni, Pt,Au, and Mo was investigated. The electron emission charac teristics of FEAs with 1 to 1600 tips were measured in ultrahigh vacuum (UH V) and in oxygen ambient. For all the FEAs, the emission current decreased with an increase in oxygen pressure. Some of the emitters were destructed d uring the emission test in oxygen ambient. The detailed analyses of the emi ssion characteristics were performed by calculating the noise power and obs erving the emission pattern on the phosphor screen. The noise power increas ed with an increase in oxygen pressure. Emission pattern on the phosphor sc reen showed enlarged emission area,as compared with the pattern obtained in UHV. The present results indicated that even the Pt emitters were affected by the ambient oxygen. The,elimination of oxygen is the essential subject for the development of field emission display. (C) 1999 American Vacuum Soc iety. [S0734-211X(99)11002-3].