Browse Prior Art Database

Effecting a Hermetic Seal in a Glass System

IP.com Disclosure Number: IPCOM000077398D
Original Publication Date: 1972-Jul-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Campagna, FJ: AUTHOR [+5]

Abstract

In a gas panel fabrication, orthogonal conductor arrays are deposited on glass substrates and a layer of dielectric applied over the conductor arrays prior to sealing the gas chamber. To eliminate panel degradation, a coating of refractory material may be utilized over the dielectric. However, in a high-temperature sealing operation involving temperature Tc (nominally 430 degrees C), the refractory material overcoat tends to crack. This problem is eliminated by a method of effecting a hermetic seal at a lower temperature, to prevent damage to the thermally sensitive gaseous discharge device.

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Effecting a Hermetic Seal in a Glass System

In a gas panel fabrication, orthogonal conductor arrays are deposited on glass substrates and a layer of dielectric applied over the conductor arrays prior to sealing the gas chamber. To eliminate panel degradation, a coating of refractory material may be utilized over the dielectric. However, in a high- temperature sealing operation involving temperature Tc (nominally 430 degrees
C), the refractory material overcoat tends to crack. This problem is eliminated by a method of effecting a hermetic seal at a lower temperature, to prevent damage to the thermally sensitive gaseous discharge device.

The gas discharge panel consists of glass substrate members 2 and 4 which are to be sealed together with a sealing material, shown as a soft glass sealing rod 3. The conductor array on substrate 4, not shown, is overlaid with a dielectric material 5 which deteriorates at a critical temperature Tc. The panel to be fabricated is assembled in an oven enclosure 6, and the oven enclosure is brought up to a temperature below Tc. At this temperature, a source of infrared radiation 7 is turned on for a period of 50-600 seconds depending on panel size. The soft glass rod sealants 3 are doped with IR absorbing oxides such as copper oxide, iron oxide, chromium oxide having absorption spectrums matching the emission spectrum of the quartz-iodine IR lamps in the infrared radiation source
7.

The infrared radiation is prevented from striking the...