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Ground Glass Tubulation Seal

IP.com Disclosure Number: IPCOM000080800D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Chaikin, A: AUTHOR [+5]

Abstract

In the fabrication of a gaseous display device, an array of conductors is formed on each of a pair of glass substrates. A dielectric is formed over each of the conductor arrays, the two substrates are positioned such that the conductor arrays are substantially orthogonal to each other, and the entire assembly is then edge sealed. The glass tubulation used to backfill the assembly with gas also requires sealing to the assembly, and must be sealed in such a way that impurities are not allowed to contaminate the inside of the gas panel. During the normal tubulation sealing cycle, the seal material has a tendency to either slide down or fall away from the tubulation, resulting in a weakened tubulation joint or a leak at the joint.

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Ground Glass Tubulation Seal

In the fabrication of a gaseous display device, an array of conductors is formed on each of a pair of glass substrates. A dielectric is formed over each of the conductor arrays, the two substrates are positioned such that the conductor arrays are substantially orthogonal to each other, and the entire assembly is then edge sealed. The glass tubulation used to backfill the assembly with gas also requires sealing to the assembly, and must be sealed in such a way that impurities are not allowed to contaminate the inside of the gas panel. During the normal tubulation sealing cycle, the seal material has a tendency to either slide down or fall away from the tubulation, resulting in a weakened tubulation joint or a leak at the joint.

After application of the seal material to the tubulation and panel, the sealing material is air dried, producing a tendency for the seal to pull away from the tubulation. Tubulation seals frequently tend to separate during the backfilling operation, and, in addition, the tubulations as purchased are frequently contaminated during the fire polishing process.

These problems have been resolved by sand blasting the tubulation seal area, whereby the seal material has a greater surface area to adhere to and does not dewet during firing. Sand blasting of the tubulation assists the seal material adhering to the applied area during the air drying stage. The separation of tubulation seals from the panel during the backfil...