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报道了金刚石膜的低电场、大电流阴极发射电流现象。总结了几种不同类型样品结构的发射机理。提出了增强发射电流、提高发射稳定性的方法。综述了各种影响发射电流的因素，提出了较为统一的发射电流表达式，使得金刚石膜的发射电流符合Ｆ－Ｎ理论。
The low electric field of diamond film and the phenomenon of high current cathode emission current are reported. The emission mechanism of several different types of sample structures is summarized. A method of enhancing the emission current and improving the emission stability is proposed. A variety of factors that affect the emission current are reviewed, and a more uniform emission current expression is proposed, which makes the emission current of the diamond film comply with F-N theory.