Accession Number : ADD006285
Title : Bonded Cathode and Electrode Structure with Layered Insulation and Method of Manufacture.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Oliver,David W ; Trzaskos,Casmir R
Report Date : 09 May 1979
Pagination or Media Count : 50
Abstract : An object of the invention is to improve the longterm resistance stability of the insulating layer between the cathode and the grid (and also the heater) in a bonded grid-cathode tube. Features of the invention relate to the structure and manufacture method in which diffusion barriers of silicon nitride are incorporated in the insulating layer. In particular, with a principal insulator of boron nitride, thin films of silicon nitride are used between it and the cathode, and also between it and the grid. As a further detail feature, an additional thin film of BN is used for stress relief next to the cathode.
Descriptors : *Patent applications, *Electron tube parts, *Insulation, Microwave tubes, Cathodes(Electron tubes), Tube grids, Vapor deposition, Boron nitrides, Silicon nitrides, Iridium, Tungsten, Layers, Power amplifiers, Stress relieving
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE