Surface-Conduction Electron-Emitter in Granular Films

There are much more obstacles to prevent the commercialization of Surface-conduction Electron-emission Display (SED) as a kind of best potential field emission display. Less effort, however, has been made to develop crucial SED emitter materials. So we suggested the granular films serve as SED emitters and proposed the details of why to select granular films and how to constitute granular films. Furthermore, the four rulers about how to constitute granular films were supposed as following: (a) forming the mixture, (b) different showing giant different physical/chemical properties, (c) one of composition showing low work function and stability, and (d) feasibility of deposition process. Basing on these rulers, the Ti-DLC and Al-AlN granular films were optimally selected as SED emitter materials and the prototype devices in using these two granular films were all fabricated. By comparing with electric properties of other materials SED emitter, our results proved that the granular film was a potential SED emitter material with low turn-on voltage of 10.5 V for Al-AlN granular films and 11.5 V for Ti-DLC granular films and low driving current of each unit (or sub-pixel) of 0.17-0.22 mA for Al-AlN granular films and 0.11-0.17 mA for Ti- DLC granular films.