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Manufacturing Process for Gas Discharge Display Panel

IP.com Disclosure Number: IPCOM000050336D
Original Publication Date: 1982-Oct-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Ahearn, W: AUTHOR [+4]

Abstract

A gas display panel has row wires and column wires that are formed on two glass plates that are spaced apart to form light-emitting cells at the cross-over points of the two sets of wires. A thin layer of insulation is formed over the wires and the adjacent regions of the glass plate to hold an electrical charge that is formed during the normal operation of the gas panel.

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Manufacturing Process for Gas Discharge Display Panel

A gas display panel has row wires and column wires that are formed on two glass plates that are spaced apart to form light-emitting cells at the cross-over points of the two sets of wires. A thin layer of insulation is formed over the wires and the adjacent regions of the glass plate to hold an electrical charge that is formed during the normal operation of the gas panel.

In an operation to write or erase a cell, the addressed cell receives coincident half select voltages on its row and column wires. These voltages must be sufficient to write or erase the addressed cell but not so great as to turn on or off other cells in the array. The range of suitable voltages is called the "margin" of the display panel. Similarly, in a sustain operation the voltage must be within the margin to produce a light output from each previously written cell but not to turn on a previously erased cell. Wide margins are desirable for high yield in manufacturing and for long operating life.

It has been found that the sustain voltage and minimum write voltage of a gas display panel are seriously reduced by carbon and carbon-bearing species such as CO and CO(2). (These voltages are the principal voltages that determine the margins.) These species are formed by the decomposition of hydrocarbons from such sources as residues of photo-resist and prints left by the plastic gloves and other sources that are typically worn by manufacturing p...