一、前言 场发射显微镜用来作为进行表面研究的一种手段一直为人们感兴趣,有关它的原理、应用和进展可参阅有关的文章[1～5]。 场发射显微镜是把金属材料作成很细的针尖,与带有导电膜的荧光屏构成一个二极管,在高电压下针尖产生场发射,在荧光屏上形成代表针尖表面特征的场发射 I. INTRODUCTION Field emission microscopes have long been of interest to people as a means of conducting surface studies. For a review of the principles, applications and developments of these fields, see the related article [1-5]. A field emission microscope is a thin tip of a metal material that forms a diode with a phosphor screen with a conductive film. Field emission occurs at the tip of the needle at high voltage, and field emission is formed on the screen to characterize the surface of the needle tip