COLD CATHODE AND A METHOD FOR THE PRODUCTION THEREOF

摘要

The invention relates to electronic engineering, more specifically to the fields thereof using physical phenomenon of electron or ion-electron or cold emission, and discloses a cold cathode and a method for the production thereof. The inventive method for producing a cold cathode involves exposing a metal or alloy cathode billet to severe plastic deformation in such a way that the initial billet structure is converted into a fragmented structure containing nanometric fragments or into a mixed structure containing grains and nanometric fragments. Said method differs in that the cathode billet, after having been exposed to severe plastic deformation, is submitted to low-temperature annealing in order to convert at least some of the above-mentioned fragments into nanometric grains at a temperature equal to or greater than the cathode operational temperature Top. The invention makes it possible to improve a method for producing a cold cathode by using severe plastic deformation and to increase the cathode efficiency by reducing the electron releasing work value.