An electron emission device exhibits a high electron emission efficiency. The device includes an electron-supply layer of metal or semiconductor, an insulator layer formed on the electron-supply layer, and a thin-film metal electrode formed on the insulator layer. The insulator layer has a film thickness...http://www.google.ca/patents/US6400070?utm_source=gb-gplus-sharePatent US6400070 - Electron emission device and display device using the same
