ELECTRON EMISSION DEVICE, MANUFACTURE THEREOF, AND IMAGE FORMING EQUIPMENT

摘要

PURPOSE:To decrease dispersion of characteristics independent of environment by covering the surface of a transition element or a transition element compound interposed between a pair of electrodes with a typical element or a typical element compound in the III group of the periodic table. CONSTITUTION:An electron emission device interposes a transition element and/or a transition element compound between a pair of electrodes, and emissions electrons by applying voltage across the electrodes. In the electron emission device, the surfaces/surface of the transition element and/or the transition element compound are/is covered with a typical element or a typical element compound in the III group of the periodic table. The surface is covered with an element, which is chemically stable and capable of covering the surface, of the typical elements or the typical element compounds. The variation of electron emission effect caused by an environmental factor can be reduced.