CN101800141A - Method for sealing ultra-thin shadow mask plasma display - Google Patents

Method for sealing ultra-thin shadow mask plasma display Download PDF

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Publication number
CN101800141A
CN101800141A CN 201010158993 CN201010158993A CN101800141A CN 101800141 A CN101800141 A CN 101800141A CN 201010158993 CN201010158993 CN 201010158993 CN 201010158993 A CN201010158993 A CN 201010158993A CN 101800141 A CN101800141 A CN 101800141A
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China
Prior art keywords
sealing
shadow mask
burning
temperature
assembly
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CN 201010158993
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CN101800141B (en
Inventor
朱振华
金烨
彭永林
杨兰兰
屠彦
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Southeast University
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Southeast University
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Abstract

The invention discloses a method for sealing an ultra-thin shadow mask plasma display. The method comprises the following steps of: cleaning and drying a shadow mask, first thick glass and second thick glass; positioning the shadow mask between the first and second thick glass and fixing the two sides of the shadow mask by using a first sealing clamp and a second sealing clamp; putting the shadow mask in a vacuum sealing furnace for pre-burning after fixing the shadow mask, wherein the pre-burning comprises an AB phase of raising the temperature, a BC phase of keeping temperature and a CD phase of lowering the temperature; cleaning the shadow mask after the pre-burning; aligning and attaching the front glass substrate of the display, the back glass substrate coated with a sealing frame, and the upper and lower surfaces of the shadow mask, placing the product obtained between the first thick glass and the second thick glass to form a sealing combination and fixing the sealing combination by using the first sealing clamp and the second sealing clamp; putting the sealing composition in the sealing furnace; setting the sintering temperature and the time; sealing the ultra-thin shadow mask plasma display; and filling working gas.

Description

A kind of method for sealing of ultra-thin shadow mask plasma display
Technical field
The present invention relates to a kind of method for sealing of display screen, especially at the method for sealing of ultra-thin shadow mask plasma display.
Background technology
General shadow mask plasma display manufacturing process comprises header board manufacturing process, back plate manufacturing process and metal shadow mask manufacturing process at present, after above-mentioned three parts are finished, utilize low-melting glass to carry out sealing-in, after carrying out bakeout degassing, charge into working gas, finish the making of display screen.
But be used for ultrathin shadow mask type ion display screen glass substrate thickness very little (less than 1mm), can produce oxidation and contaminating impurity unavoidably in the shadow mask preservation process, form small burr, maximum temperature can reach 450 ℃ in the sealing-in process, the ultra-thin glass substrate can soften, differ bigger with the thermal stress of metal shadow mask, therefore the front and back glass substrate need bear and the local stress that produces, because ultra-thin glass base plate deformation holding capacity is much smaller than common plasma panel glass substrate, thereby make ultra-thin display screen in the sealing-in process, be easy to generate slight crack and depression points, cause ultra-thin display screen sealing-in failure.
Summary of the invention
Technical problem: the objective of the invention is in the method for sealing at existing ultra-thin plasma panel, shadow mask is not carried out special processing, thereby cause the low problem of ultra-thin plasma panel sealing-in success rate, propose a kind of ultra-thin shadow mask plasma display method for sealing that can improve the sealing-in success rate.
Technical scheme:
A kind of method for sealing of ultrathin shadow mask type plasma panel may further comprise the steps:
Step 1 is dried shadow mask, first heavy sheet glass and second heavy sheet glass with ultrasonic waves for cleaning;
Shadow mask after step 2 will be dried places between first heavy sheet glass and second heavy sheet glass and obtains the pre-burning assembly, and with first sealing-in folder and second sealing-in folder pre-burning assembly both sides is fixed;
Step 3 places the sealing-in stove that vacuumizes to begin pre-burning the pre-burning assembly that fixes, and the pre-burning assembly is from room temperature T 0Be heated to pre-burning maximum temperature T PeakAnd heating rate is 10 ℃/min-20 ℃/min, arrives pre-burning maximum temperature T PeakBegin to enter the insulation BC stage, temperature retention time t BCBe controlled at 30min-45min, last, begin to enter the cooling CD stage, cooling rate remains on 3 ℃/min-6 ℃/min, reduces to room temperature T 0Finish described pre-burning maximum temperature T PeakDeduct 50 ℃ difference less than sealing temperature and greater than sealing temperature;
After the pre-burning-out of step 4, shadow mask is taken out from the pre-burning assembly, use the dust-free paper wiping again, and dry with ultrasonic waves for cleaning;
Step 5 applies the sealing-in frame at the back glass substrate, to shield front glass substrate, back glass substrate and shadow mask and show the contraposition applying up and down, the sealing-in screen is treated in formation, to treat that the sealing-in screen places between first heavy sheet glass and second heavy sheet glass, form the sealing-in assembly, with first sealing-in folder and second sealing-in folder sealing-in assembly is fixed again;
Step 6 is put into the sealing-in stove with the sealing-in assembly, sets sintering temperature and time, the ultrathin shadow mask type plasma panel is carried out sealing-in, and charge into working gas, and described sintering temperature is 400 ℃-500 ℃, and sintering time is 4-7 hour.
Beneficial effect: the present invention is directed to ultra-thin plasma display screen substrate stress and bear relatively poorly, after shadow mask cleaned, utilize two blocks of heavy sheet glass to fix, guarantee the smooth of shadow mask; Control temperature and time in the sealing-in stove then, carry out pre-burning, cleaning, drying once more after finishing carries out sealing-in.Through the shadow mask after the pre-burning processing, effectively the place to go impurity and burr, the unstable strong point under hot conditions has been got rid of on the shadow mask in pre-burning simultaneously, improved shadow mask stability at high temperature, make super shadow mask type plasma display screen when sealing-in, front-back baseboard is stressed has evenly avoided the generation of sags and crests and slight crack, has improved the sealing-in success rate.
Description of drawings
Fig. 1 is a fixedly schematic diagram of shadow mask pre-burning, comprising: first heavy sheet glass (1), shadow mask (2), second heavy sheet glass (3), first sealing-in folder (4) and second sealing-in folder (5).
Fig. 2 is a shadow mask pre-burning curve chart among the present invention, comprises heat temperature raising process AB and heating-up time t AB, insulating process BC and temperature retention time t BCWith temperature-fall period CD and temperature fall time t CD
Fig. 3 is a ultrathin shadow mask type plasma panel sealing-in process sectional view, comprising: first heavy sheet glass (1), shadow mask (2), second plate glass (3), first sealing-in folder (4), second sealing-in folder (5), sealing-in frame (6), metacoxal plate (7) and prebasal plate (8).
Embodiment
The present invention will be further described with following 1-3 in conjunction with the accompanying drawings and embodiment.
A kind of method for sealing of ultrathin shadow mask type plasma panel may further comprise the steps:
Step 1 is dried shadow mask 2, first heavy sheet glass 1 and second heavy sheet glass, 3 usefulness ultrasonic waves for cleaning;
Shadow mask 2 after step 2 will be dried places between first heavy sheet glass 1 and second heavy sheet glass 3 and obtains the pre-burning assembly, and with first sealing-in folder, 4 and second sealing-in folder 5 pre-burning assembly both sides is fixed;
Step 3 places the sealing-in stove that vacuumizes to begin pre-burning the pre-burning assembly that fixes, and the pre-burning assembly is from room temperature T 0Be heated to pre-burning maximum temperature T PeakAnd heating rate is 10 ℃/min-20 ℃/min, arrives pre-burning maximum temperature T PeakBegin to enter the insulation BC stage, temperature retention time t BCBe controlled at 30min-45min, last, begin to enter the cooling CD stage, cooling rate remains on 3 ℃/min-6 ℃/min, reduces to room temperature T0 and finishes described pre-burning maximum temperature T PeakDeduct 50 ℃ difference less than sealing temperature and greater than sealing temperature, in the present embodiment, heating rate is 10 ℃/min, 20 ℃/min, 13 ℃/min or 18 ℃/min, temperature retention time t BCBe 30min, 45min, 36min or 43min, cooling rate is 3 ℃/min, 6 ℃/min, 4 ℃/min or 5 ℃/min, pre-burning maximum temperature T PeakBe (sealing temperature-50 ℃), sealing temperature, (sealing temperature-42 ℃) or (sealing temperature-18 ℃);
After the pre-burning-out of step 4, shadow mask 2 is taken out from the pre-burning assembly, use the dust-free paper wiping again, and dry with ultrasonic waves for cleaning;
Step 5 applies sealing-in frame 6 at back glass substrate 7, to shield front glass substrate 8, back glass substrate 7 and shadow mask 2 and show the contraposition applying up and down, the sealing-in screen is treated in formation, to treat that the sealing-in screen places between first heavy sheet glass 1 and second heavy sheet glass 3, form the sealing-in assembly, press from both sides 5 with 4 and second sealing-in of first sealing-in folder again the sealing-in assembly fixed;
Step 6 is put into the sealing-in stove with the sealing-in assembly, set sintering temperature and time, the ultrathin shadow mask type plasma panel is carried out sealing-in, and charge into working gas, described sintering temperature is 400 ℃-500 ℃, and sintering time is 4-7 hour, in the present embodiment, sintering temperature is 400 ℃, 500 ℃, 420 ℃ or 470 ℃, and sintering time is 4 hours, 5 hours or 7 hours.
If sealing-in to as if the powder display screen arranged, then to apply fluorescent material to the shadow mask after pre-burning, the cleaning 2, and baking once more, remove the organic solvent in the fluorescent powder paste material, baking temperature is 450 ℃-475 ℃, time is half an hour, is 450 ℃, 455 ℃ or 475 ℃ to shadow mask 2 baking temperatures that scribble fluorescent material in this example.
Embodiment 1
In this example, we utilize said method to finish the sealing-in that 50mm * 50mm does not have the monochromatic ultrathin shadow mask type display screen of the pure Ne of fluorescent material, ultra-thin glass thickness is 50 μ m, first heavy sheet glass 1 and second heavy sheet glass 3 adopt the very high PD200 glass of evenness, area is 100mm * 100mm, thickness is 1.1mm, and concrete steps are as follows:
Step 1 utilizes ultrasonic wave to clean first heavy sheet glass 1, second heavy sheet glass 3 and shadow mask, and oven dry;
Step 2 places big or small 31.5mm * 31.5mm shadow mask 2 between first heavy sheet glass 1 and the second back glass 3, forms the pre-burning assembly, and presss from both sides 5 with 4 and second sealing-in of first sealing-in folder pre-burning assembly fixed;
Step 3 is put into vacuum degree with the pre-burning assembly that fixes and is reached 8 * 10 -5In the sealing-in stove of Pa, initial temperature T 0For room temperature is 25 ℃, according to the pre-burning curve, enter temperature rise period AB, heating rate is 12 ℃/min, temperature rises to 400 ℃, enters holding stage BC, temperature retention time t BCBe 30 minutes, begin to enter temperature-fall period CD then, speed is 3 ℃/min, and temperature arrives room temperature T 0
Step 4 is taken out shadow mask 2, first heavy sheet glass 1 and second heavy sheet glass 3 after the pre-burning, and impurity and burr on the shadow mask are removed in the dust-free paper wiping of cooling back, carries out ultrasonic waves for cleaning and oven dry once more;
Step 5 is got two of 50mm * 50mm ultra-thin glass, to wherein one carry out evaporation magnesium oxide, be made into ultra-thin screen prebasal plate 8, frit seal frame 6 will be coated around another piece ultra-thin glass, be made into ultra-thin screen metacoxal plate 7, sealing-in frame 6 live widths are 1.8mm, and the area size that sealing-in frame 6 inner edges surround is 33.5mm * 33.5mm;
Step 6 is fitted in shadow mask upper and lower after the pre-burning cleaning with ultra-thin screen prebasal plate 8 and the metacoxal plate 7 that scribbles frit seal frame 6, and place between first heavy sheet glass 1 and second heavy sheet glass 3, form the sealing-in assembly, and the sealing-in assembly is fixed with first sealing-in folder, 4 and second sealing-in folder 5, put into the sealing-in stove, temperature is upgraded to 380 ℃ in the sealing-in stove, charge into the pure Ne gas of 300torr, setting the sintering maximum temperature is 450 ℃, the sealing-in time is 4.5 hours, finishes the sealing-in of ultra-thin plasma panel.
Embodiment 2
In this example, we utilize said method to finish the sealing-in that 50mm * 50mm has the green powder ultrathin shadow mask type of fluorescent material Ne+10%Xe display screen, ultra-thin glass thickness is 50 μ m, first heavy sheet glass 1 and second heavy sheet glass 3 adopt the very high PD200 glass of evenness, area is 100mm * 100mm, thickness is 1.1mm, and concrete steps are as follows:
Step 1,2,3,4 is with step 1,2,3,4 among the embodiment 1;
The shadow mask 2 coating green emitting phosphors that step 5 is finished preliminary treatment toast the shadow mask 2 that scribbles fluorescent material, and temperature is 450 ℃, and stoving time is half an hour;
Step 6 is with the step 5 in the embodiment 1;
Step 7 is fitted in shadow mask upper and lower after the pre-burning cleaning with ultra-thin screen prebasal plate 8 and the metacoxal plate 7 that scribbles frit seal frame 6, and place between first heavy sheet glass 1 and second heavy sheet glass 3, form the sealing-in assembly, and the sealing-in assembly is fixed with first sealing-in folder, 4 and second sealing-in folder 5, put into the sealing-in stove, temperature is upgraded to 380 ℃ in the sealing-in stove, charge into the pure Ne+20%Xe mist of 300torr, setting the sintering maximum temperature is 450 ℃, the sealing-in time is 4.5 hours, finishes the sealing-in of the ultra-thin plasma panel of fluorescent material.

Claims (2)

1. the method for sealing of a ultrathin shadow mask type plasma panel is characterized in that, may further comprise the steps:
Step 1 is dried shadow mask (2), first heavy sheet glass (1) and second heavy sheet glass (3) with ultrasonic waves for cleaning;
Shadow mask (2) after step 2 will be dried places between first heavy sheet glass (1) and second heavy sheet glass (3) and obtains the pre-burning assembly, and with first sealing-in folder (4) and second sealing-in folder (5) pre-burning assembly both sides is fixed;
Step 3 places the sealing-in stove that vacuumizes to begin pre-burning the pre-burning assembly that fixes, and the pre-burning assembly is from room temperature T 0Be heated to pre-burning maximum temperature T PeakAnd heating rate is 10 ℃/min-20 ℃/min, arrives pre-burning maximum temperature T PeakBegin to enter the insulation BC stage, temperature retention time t BCBe controlled at 30min-45min, last, begin to enter the cooling CD stage, cooling rate remains on 3 ℃/min-6 ℃/min, reduces to room temperature T 0Finish described pre-burning maximum temperature T PeakDeduct 50 ℃ difference less than sealing temperature and greater than sealing temperature;
After the pre-burning-out of step 4, shadow mask (2) is taken out from the pre-burning assembly, use the dust-free paper wiping again, and dry with ultrasonic waves for cleaning;
Step 5 applies sealing-in frame (6) at back glass substrate (7), to shield front glass substrate (8), back glass substrate (7) and shadow mask (2) and show the contraposition applying up and down, the sealing-in screen is treated in formation, to treat that the sealing-in screen places between first heavy sheet glass (1) and second heavy sheet glass (3), form the sealing-in assembly, with first sealing-in folder (4) and second sealing-in folder (5) the sealing-in assembly is fixed again;
Step 6 is put into the sealing-in stove with the sealing-in assembly, sets sintering temperature and time, the ultrathin shadow mask type plasma panel is carried out sealing-in, and charge into working gas, and described sintering temperature is 400 ℃-500 ℃, and sintering time is 4-7 hour.
2. the method for sealing of ultrathin shadow mask type plasma panel according to claim 1 is characterized in that, the shadow mask (2) after pre-burning, the cleaning is carried out sprayed with fluorescent powder, and baking once more.
CN2010101589937A 2010-04-27 2010-04-27 Method for sealing ultra-thin shadow mask plasma display Expired - Fee Related CN101800141B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102142344A (en) * 2011-02-24 2011-08-03 东南大学 Sealing-in fixing device and sealing-in method thereby
CN103745935A (en) * 2013-12-19 2014-04-23 北京时代民芯科技有限公司 Vacuole-free transparent glass shell and metal sealing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070212972A1 (en) * 2004-05-11 2007-09-13 Hiroyuki Wada Method of manufacturing image display device
CN101339876A (en) * 2008-08-04 2009-01-07 南京华显高科有限公司 Sealing method of shadow mask type plasma display screen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070212972A1 (en) * 2004-05-11 2007-09-13 Hiroyuki Wada Method of manufacturing image display device
CN101339876A (en) * 2008-08-04 2009-01-07 南京华显高科有限公司 Sealing method of shadow mask type plasma display screen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102142344A (en) * 2011-02-24 2011-08-03 东南大学 Sealing-in fixing device and sealing-in method thereby
CN103745935A (en) * 2013-12-19 2014-04-23 北京时代民芯科技有限公司 Vacuole-free transparent glass shell and metal sealing method
CN103745935B (en) * 2013-12-19 2016-09-07 北京时代民芯科技有限公司 A kind of vacuole-free transparent glass shell and metal sealing method

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