| 摘要 |
<p>PURPOSE:To provide a linear electron source in which an oxide electron emission material is hardly torn off, by attaching the electron emission material between the lines of an insulator arranged partially on a linear core wire. CONSTITUTION:A linear core wire 10 is made of a tungsten wire. A spiral insulating wire 1 is made by attaching about 5mum of alumina being an insulator to a tungsten wire 12. Between the lines of the spiral insulating wire 11, an electron emission material 14 which consists of an oxide material of barium or the like is attached to compose a linear hot cathode to be a linear electron source. By such a constitution, the electron emission material is made to be hardly torn off.</p> |
