COLD CATHODE DISCHARGE TUBE AND ITS MANUFACTURE

摘要

PURPOSE:To realize a cold cathode discharge tube having low discharging voltage and long service life, by employing high melting point material having low work function and low abrasion against ion shock under the state where the characteristics of said material can be exhibited sufficiently. CONSTITUTION:A cathode 3 is constructed by forming an amorphous emitter 9 composed of complex metal oxide (BaO.SrO) of barium oxide and strontium oxide at the portion of a cathode substrate 8 made of Ni to be utilized for discharge or the crossing section with an anode 5. The emitter layer 9 is formed by mixing 1.65wt% of barium butyric acid, 1.17wt% of strontium propionic acid, 94.18wt% of butyl alcohol and 3wt% of cetyl alcohol into liquid, then coating the mixture onto the cathode substrate 8 thereafter thermally dissolving the alkoxide of barium and strontium to produce a complex metal oxide layer of amorphous barium oxide and strontium oxide which is secured on the surface of the cathode substrate 8.