Browse Prior Art Database

Online Check of Gas Purity

IP.com Disclosure Number: IPCOM000084072D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Marchetti, AA: AUTHOR [+2]

Abstract

In a gaseous discharge display device, parallel conductor arrays are orthogonally disposed on glass substrates and overcoated with a dielectric layer and a refractory coating to prevent sputtering of the electrodes. The substrates are then sealed and filled with a gas under pressure to provide a display when selected orthogonal conductors are fired. One of the potential problems in implementing gas panel technology relate; to gas purity, since erratic operation will result when the gas is contaminated.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 2

Online Check of Gas Purity

In a gaseous discharge display device, parallel conductor arrays are orthogonally disposed on glass substrates and overcoated with a dielectric layer and a refractory coating to prevent sputtering of the electrodes. The substrates are then sealed and filled with a gas under pressure to provide a display when selected orthogonal conductors are fired. One of the potential problems in implementing gas panel technology relate; to gas purity, since erratic operation will result when the gas is contaminated.

The described apparatus provides an online check and test of gas purity during the evacuation and backfill operation. The backfill station of the gas panel comprises a gas tank 11 from which gas is applied through a reducer valve 13 and a variable leak valve 15, which controls the rate of flow of the gas into the manifold 17. A purifier 19 may contain a getter which will assist in eliminating certain impurities and which will be fired at predetermined intervals.

An auxiliary gas panel 21 within a sealed envelope 22 is also connected to the manifold 17, whereby the gas contained therein is that utilized to fill the gas panels 23 from the manifold 17. The gas panel 21 is attached to and supported by the envelope by a glass rod 24.

The auxiliary gas panel 21 will be sufficiently large to provide a light output when all cells are fired, which can be analyzed by an emission spectrograph to identify potential contaminants by a wavelength analysis. The only requireme...