Browse Prior Art Database

Gas Panel Seal Configuration

IP.com Disclosure Number: IPCOM000081717D
Original Publication Date: 1974-Jul-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Lussow, RO: AUTHOR

Abstract

In the construction of Gas Discharge Display panels (GDDP), the discharge chamber is formed by sealing together two flat plates with a solder glass. The separation between the glass plates is equal to the solder glass thickness after the seal is effected. In the current GDDP structure, the solder glass forms four sides of the rectangular chamber. The dimensions of the discharge chamber vary depending upon the model of the GDDP considered.

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Gas Panel Seal Configuration

In the construction of Gas Discharge Display panels (GDDP), the discharge chamber is formed by sealing together two flat plates with a solder glass. The separation between the glass plates is equal to the solder glass thickness after the seal is effected. In the current GDDP structure, the solder glass forms four sides of the rectangular chamber. The dimensions of the discharge chamber vary depending upon the model of the GDDP considered.

The process for forming the edge seal involves the deposition of the solder glass material at the edge of one or both of the flat plates to be joined, so that the solder glass forms a continuous band around the periphery of the plate or plates. The two plates to be joined are positioned in contact with each other and subjected to the appropriate heat and pressure, to cause the solder glass to soften and flow and be compressed to the desired thickness. After compression and wetting have occurred, the structure is cooled and the solder glass becomes rigid and the seal is complete.

There are two basic methods for applying the solder glass to the plates which are being joined. One technique uses powdered solder glass in a binder to form a slurry or "green sheet". The application can be by extrusion, silk screening, etc., or, in the case of "green sheet", as a preform. These application techniques require an additional process step to remove the organic binder material by distillation or combustion. A second technique uses the solder glass in rod form. A closed frame of the solder glass rod is prefabricated and simply inserted between the flat plates to be joined.

There are a number of techniques used for the prefabrication step and most require at l...