| 摘要 |
An electron emitter for generating an electron beam is characterized in that the end of the emitter on the emission side of the electron beam is conical and has a radius of curvature of 1 um or more and is applied with an electric field to thereby emit electrons using a Schottky effect, and wherein the emitter has a form not to reveal a {100} crystal plane in a portion of the side surface.
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