Abstract
A study is made of the influence on the electrical properties of a MIM cathode of the material of a thin-film upper electrode and of the composition and pressure of the ambient atmosphere. It has been shown experimentally that the mechanism of degradation of the emission centers, which consists of an increase of their size irrespective of the materials of the insulator and of the electrodes, takes the form of the formation in sequence of new emission centers in the immediate proximity of already existing centers, this being due to the high local temperature in the existing centers.
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