Study of a normal-gate CNT-FED using HOP glass
Field emission display inherits excellent display qualities of traditional CRT and is a prospective flat display panel. Traditional normal gate FED consists of front and rare glass substrates, using spacer matrix for maintain fixed gap. Compared with diode structure, the modulation voltage is lower in triode structure because of the shorter gap between gate and cathode. However, in a normal gate triode, the field emission emitters can be easily destroyed because of the later fabrication of dielectric layer and gate. Moreover, cathode emission is quite sensitive to structure parameters such as dielectric layer thickness, anode voltage and gate aperture; therefore, it is hard to guarantee emission uniformity.This paper introduces a structure similar to HOP one to solve the problems above1. Gates and sequent spacers are screen printed on glass. Because the field emitters and hop glass are fabricated respectively, the emission emitters will not be destroyed in the later process the vacuum gap between cathode and gate replaces dielectric layer, so the small modulation voltage can be obtained. To ensure the mechanical strength of the hop glass plate, the thickness of die hop plate increases to0.55mm.2. Because glass is flatter than ordinary dielectric layer, better emission uniformity can be gotten. The hole of the hop plate is similar to dumbbell structure. We can change the shape of the hole to get good display effect. At present, the number of electrons reaching anode is less than 1％ of electrons emitted by carbon nanotube. Thereupon, we should evaporate MgO to the lower half part of the holes to get secondary electrons. Now the voltage of gate is about 250V.The technics flow shows as follows. At first, the CNTs paste was printed on cathode and the phosphors paste was printed on anode by screen-printing method and fired at 160℃. Then, the holes of hop plate are eroded by chemical method. The gate preparation is also use screen-printing method. And MgO is evaporated. Next, cathode plate, anode plate and gate plate are Packaged by frit. At last, after pumping, we get the display panel.
Field Emission Display (FED) Triode Structure Normal-Gate Carbon Nanotube (CNT) HOP glass
Kairong Chu Wei Lei Xiaobing Zhang Yunsong Di Jing Chen Xiaxi Yang
Department of Electronic Engineering, Southeast University, Nanjing, 210018
国际会议
桂林
英文
437-438
2006-07-17（万方平台首次上网日期，不代表论文的发表时间）