| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electron emission device for emitting electrons with high efficiency. SOLUTION: An electron emission device comprises a semiconductor layer for supplying electrons, porous semiconductor layer formed over the semiconductor layer, and thin metal film electrode formed over the porous semiconductor layer. An electric field is applied between the semiconductor layer and thin metal film electrode to emit electrons. A carbon region consisting of carbon or its compound is formed over or below or in the thin metal film electrode.</p> |
