Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1996-04-24
1998-09-01
Bradley, P. Austin
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
445 58, 427 68, H01J 922, H01J 926
Patent
active
058002340
ABSTRACT:
The present invention relates to a method for manufacturing a metallized luminescent screen for a CRT. At least one phosphor layer is deposited (10) on an inner surface of a faceplate panel to form the luminescent screen. The panel containing the screen is then preheated (12) to a temperature equal to, or in excess of, a minimum film-forming temperature and prewetted (14) by applying water to the screen. An aqueous filming emulsion containing a copolymer of acrylates and methacrylates with an average molecular weight of from 250,000 to 500,000 is applied (16) to the prewetted screen and dried (18) to form a film layer. Next, a layer of aluminum is deposited (20) onto the film layer, and the panel, bearing the metallized screen, is sealed to a funnel by heating the panel and the funnel through a sealing cycle. The sealing cycle(22) has a first rate of temperature increase to a first temperature and a second rate of temperature increase, less than the first rate, to a second temperature. The difference between the first temperature and the second temperature is sufficient to volatilize the film layer. The second temperature is maintained (24) for a period of time sufficient to frit seal the panel to the funnel. The sealed faceplate panel and funnel are then cooled (26).
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Cinquina Patrizia
Levine Aaron William
Manciocco Guido
Spina Paolo
Bradley P. Austin
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Knapp Jeffrey T.
Tripoli Joseph S.
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