Browse Prior Art Database

Devitrified Glass for Gas Panel Dielectrics

IP.com Disclosure Number: IPCOM000087569D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Anderson, LC: AUTHOR

Abstract

Fabrication of gaseous discharge display/storage devices is described in U. S. Patent 3,837,724. In the fabrication of such devices, reflowed dielectric glasses are used to provide a clear amorphous film over the conductor arrays formed on a pair of glass plates. Material constraints on the system require a dielectric glass reflow temperature of over 600 degrees C, which is approximately 100 degrees C above the softening point of the soda-lime plate glass. Due to this constraint, the flatness, strain and dielectric quality of the plate assemblies are constant control problems in production.

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Devitrified Glass for Gas Panel Dielectrics

Fabrication of gaseous discharge display/storage devices is described in U.
S. Patent 3,837,724. In the fabrication of such devices, reflowed dielectric glasses are used to provide a clear amorphous film over the conductor arrays formed on a pair of glass plates. Material constraints on the system require a dielectric glass reflow temperature of over 600 degrees C, which is approximately 100 degrees C above the softening point of the soda-lime plate glass. Due to this constraint, the flatness, strain and dielectric quality of the plate assemblies are constant control problems in production.

Operation at a temperature below the softening point of the plate glass is provided by the use of a devitrified sealing glass for the dielectric which reflows and crystallizes below 500 degrees C, thus eliminating the high temperature reflow problems enumerated above. The literature suggested that films of devitrified glass would be opaque and therefore unsuitable for a gas panel display, while in practice they were transparent. Furthermore, the crystallizing glass behavior of the devitrified dielectric glass can be used to advantage in creating special geometries such as crossover ridges and double layers which are not possible using conventional dielectric. By allowing thermal processes to be run below the softening point of the plate glass, the production yield is increased with a resultant lowering of cost, and enhanced capabilit...