Accession Number : AD0872918

Title :   Investigation of Solid State Cold Cathodes.

Descriptive Note : Interim rept. 16 Mar-14 Jun 70,

Corporate Author : RCA ELECTRONIC COMPONENTS PRINCETON NJ ELECTRO-OPTICS LAB

Personal Author(s) : Kohn, Elliot S.

Report Date : 29 JUN 1970

Pagination or Media Count : 47

Abstract : The principles of operation of the negative electron affinity cold cathode are discussed, and it is shown that a practical device is possible. Samples that have been made with novel structures to overcome the problems associated with current crowding are described. A negative electron affinity surface has been achieved on epitaxially-grown silicon, making the silicon cold cathode considerably closer to realization. High photosensitivities have been measured on liquid-grown and vapor-grown GaAs devices, and small cold cathode emission currents have been measured. Two experimental vacuum systems have been constructed for activating GaAs and silicon cold cathodes. The problem of current crowding in circular structures has been solved, and curves are presented illustrating the resulting current profiles. It is found that, for cold cathodes of the type being studied, reasonable profiles may be expected for practical operating levels. (Author)

Descriptors :   *TRANSISTORS), (*CATHODES(ELECTRON TUBES), (*COLD CATHODE TUBES, WORK FUNCTIONS), EPITAXIAL GROWTH, BAND THEORY OF SOLIDS, TRAVELING WAVE TUBES, TUNNELING(ELECTRONICS), SEMICONDUCTOR DIODES, FIELD EMISSION, SURFACE PROPERTIES, EFFICIENCY, PHOTOELECTRIC EFFECT, DOPING, PHOTOCATHODES, VAPOR PLATING, SOLID STATE PHYSICS, VIDICONS, EXCITATION, SILICON, GALLIUM ARSENIDES, VACUUM APPARATUS.

Subject Categories : Electrooptical and Optoelectronic Devices
      Crystallography
      Quantum Theory and Relativity
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE