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Browse Prior Art Database

Gas Panel Metallurgy System

IP.com Disclosure Number: IPCOM000084077D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Seehase, H: AUTHOR

Abstract

In gaseous discharge display devices, the electrodes are comprised of conductor arrays which are formed on a pair of glass substrates and overcoated with a dielectric layer, to insulate the metal conductors from direct contact with the gas. When the conductor arrays are configured orthogonal to each other, displays are generated by selective application of drive signals to the associated conductors to provide ionization of the gas between selected electrodes.

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Gas Panel Metallurgy System

In gaseous discharge display devices, the electrodes are comprised of conductor arrays which are formed on a pair of glass substrates and overcoated with a dielectric layer, to insulate the metal conductors from direct contact with the gas. When the conductor arrays are configured orthogonal to each other, displays are generated by selective application of drive signals to the associated conductors to provide ionization of the gas between selected electrodes.

One of the problems in this technology is that of adhesion of the metallic conductors to the glass substrate. While copper represents an excellent conductor, copper does not adhere to glass. One of the solutions of this problem was to provide a three-layer metal electrode having lower and upper layers of chrome to provide adherence of the copper to the glass, and to protect the upper surface of the copper against attack by the glass dielectric during the dielectric reflow step. However, this required three separate evaporations with a resultant complexity in the fabrication process.

An alternate solution to this problem using a single conductor of gold metallurgy with magnesium oxide below and above the conductor layers resulted in simpler fabrication.

It is generally known that glass will adhere well to metals capable of forming a compatible oxide. However, gold is a noble metal which does not form an oxide for either good adhesion or reflow. However, gold does . adhere fairly well to certain metal oxides including magnesium oxide. The interposing of a metal oxide to supply or enhance the capability of a metal conductor...