| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain an electron emission element for obtaining stable emission current due to reduction of operation voltage. <P>SOLUTION: The electron emission element includes a polycrystalline film of lanthanum boride, and a size of a crystallite which composes the polycrystalline film is not less than 2.5 nm and not more than 100 nm. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
