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Manufacturing Gas Display Panel

IP.com Disclosure Number: IPCOM000081539D
Original Publication Date: 1974-Jun-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Takamori, T: AUTHOR

Abstract

In the manufacturing process of gas panels with flowed-on dielectrics, the two flowed-on dielectrics have been sealed together to obtain the hermetical envelope for the inert gas. The temperature at which the sprayed dielectrics (glass powder layer) is subjected to the reflowing process, however, is not so high to give the glass layer sufficiently low viscosity, such that a completely hermetical envelope can always be expected. The viscosity of the dielectric glasses is usually 10/5/ poises, or higher, at the reflowing temperature.

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Manufacturing Gas Display Panel

In the manufacturing process of gas panels with flowed-on dielectrics, the two flowed-on dielectrics have been sealed together to obtain the hermetical envelope for the inert gas. The temperature at which the sprayed dielectrics (glass powder layer) is subjected to the reflowing process, however, is not so high to give the glass layer sufficiently low viscosity, such that a completely hermetical envelope can always be expected. The viscosity of the dielectric glasses is usually 10/5/ poises, or higher, at the reflowing temperature.

Boundaries of powder particles may remain in the form of tiny bubbles and/or flaws, which may cause leakage. Any hermetical glass-to-metal seals between the dielectric glass and metal lead lines are not expected, of course, for the same reason. Further, since the dielectrics are sprayed all over the glass plate covering the all metal lines on it, ends of the metal lines have to be exposed by an additional etching process after sealing for attaining electrical contacts.

Described is a technique which eliminates such leakage potentiality and, supplementally, the etching process. This technique consists of the method of manufacturing gas display panels by the process including the steps; of spraying the dielectric glass powder on the restricted area (by masking) of the glass plate, of which the outer edge is well covering the active area of the panel, but well inside of the solder glass sealing edge; the fi...