CN1801432A - Non air exit hole sealing method for field emission display screen - Google Patents
Non air exit hole sealing method for field emission display screen Download PDFInfo
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- CN1801432A CN1801432A CN 200410103210 CN200410103210A CN1801432A CN 1801432 A CN1801432 A CN 1801432A CN 200410103210 CN200410103210 CN 200410103210 CN 200410103210 A CN200410103210 A CN 200410103210A CN 1801432 A CN1801432 A CN 1801432A
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Abstract
The invention provides a sealing method without exhaust hole for field emission display screen, which comprises: mixing the low-melting point glass power, agglomerant and defoamer with given proportion to prepare glass slurry of low-melting point; transferring it on anode plate by multiple printing to form sealing frame with some exhaust holes; sintering at high temperature for one hour, cooling to room temperature, and taking out! This invention needs not to make exhaust hole or pipe on display screen, avoids long-time exhaust process and damage of device, and increases product up-to-standard rate.
Description
Technical field
The present invention relates to the method for sealing of a kind of method for sealing of field emission display screen, particularly a kind of non air exit hole.
Technical background
The sealing-in exhaust process of field emission display screen (FED) employing at present is roughly as follows: coating low-melting glass slurry forms the sealing-in frame on the anode glass substrate, through high temperature sintering removal organic binder bond wherein, arrange separaant thereon, with minus plate with positive plate carries out superimposed and negative electrode and corresponding three primary colors fluorescent powder are aimed at, put into sintering furnace with clamp and carry out sealing-in again at sealing temperature.After sealing-in was finished, device will be received on the vacuum system carried out the high-temperature baking degasification by the blast pipe of sealing-in in advance in the steam vent position, finishes activation simultaneously, when device activates, when exhaust finishes with its sealed-off.As " University of Fuzhou's journal (natural science edition) " 2002, the Chen Jianlin that deliver NO.3 P286～287, what the article of Guo Tailiang " process for sealing of field-emission plane display (FED) " adopted is exactly this method, there is following weak point in this method: 1. because the distance between FED device cathodes and anode is very little, vacuum degree is had relatively high expectations, therefore need long evacuation time (for 34 inches field emission display screen evacuation times greater than 3 hours), for a long time heated baking exhaust display screen is easy to generate stress, influences the mechanical strength of device and display quality etc.; 2. its sealing-in process is carried out in atmosphere or neutral protection atmosphere, and oxidation takes place in hot environment easily for electrode and cathode material, influences the performance of display screen.
Summary of the invention
In order to overcome above-mentioned deficiency, the purpose of this invention is to provide a kind of improved field emission flat display screen method for sealing, a kind of non air exit hole sealing method of field emission display screen particularly is provided, and it will shorten evacuation time greatly, and guarantee that the performance of display screen internal material is unaffected.
The objective of the invention is to be achieved through the following technical solutions:
The present invention comprises following steps:
(1), the making of sealing-in frame: a), glass powder with low melting point, binding agent and defoamer evenly are mixed with the low-melting glass slurry according to certain mixed; B), the low-melting glass slurry is transferred on the positive plate, form the sealing-in frame that is distributed with several steam vents by repeatedly printing; C), will reduce to room temperature after 1.0 hours at 380 ℃～400 ℃ high temperature sinterings with the positive plate of sealing-in frame takes out;
(2), on anode, arrange separaant and getter, then with the superimposed aligning of minus plate, and clamp with special fixture, put into vacuum drying oven again and vacuumize with certain speed, arrive 10 in vacuum degree
-3Begin heating during Pa, the room temperature taking-up is reduced in insulation after 20 minutes in the time of 450 ℃.
The described low-melting glass slurry is transferred on the positive plate forms by 4～10 printings.
Described glass powder with low melting point, binding agent, defoamer are to mix by ball milling in 10: 0.70～0.90: 0.005～0.05 ratio.
Described defoamer can adopt KNO
3, NH
3NO
3, BaO
2, Pb
3O
4In one or several mixing.
Steam vent in the described sealing-in frame be one with sealing-in frame vertical groove on horizontal plane.
Width (the B of described sealing-in frame
1) and height (H
1) the long-pending groove length (L that equals
2) and the interior low-melting glass slurry thickness (H of groove
2) amassing, i.e. B
1H
1=L
2H
2
The width B of described groove
2Be 3～10mm, low-melting glass slurry thickness H in the groove
2Be 0.1～1.5mm, length L
2Be 1～10mm, the spacing L of groove
1Be 10～100mm.
The present invention has following advantage: 1., since the present invention in the sealing-in frame, form several steam vents, thereby make the exhaust process of device in sealing-in, to finish, so not only need not on display screen, to make steam vent and blast pipe, and exempted after the sealing-in exhaust process for a long time, sealing-in, activation, sealed-off can also be merged simultaneously and in one procedure, finish; 2., because device sealing-in in a vacuum, thereby solved negative electrode on the minus plate, insulating barrier, grid, cathode material easy ruined problem in high temperature; 3. owing to adopt special binding agent and defoamer, avoid low-melting glass under vacuum environment, to produce the sealing-in bubble, guaranteed the air-tightness of sealing-in; 4., the present invention merges sealing-in, activation, exhaust, sealed-off, reduced operation, reduced the operating time, also improved product qualified rate simultaneously thereby improved the efficient that display screen makes greatly.5., the present invention not only is applied to the sealing-in of field emission display screen, but also can be applied to the sealing-in of luminescent screen of field emission backlight and the sealing-in of plasma display panel (PDP).
Below will be described in further detail the present invention by specific embodiment.
Description of drawings:
Fig. 1 is the partial front elevation view of sealing-in frame among the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is a sealing temperature curve chart of the present invention.
Embodiment
The present invention realizes as follows:
(1), the making of sealing-in frame: glass powder with low melting point, binding agent and the defoamer ratio in 10: 0.70～0.90:0.005～0.05 is mixed by ball milling, wherein binding agent can adopt butyl acetate and nitrocotton or butyl acetate and acrylic resin or terpinol and nitrocotton, and defoamer can adopt KNO
3, NH
3NO
3, BaO
2, Pb
3O
4In one or several mixing.
Above-mentioned slurry is formed Fig. 1 to shown in Figure 3 sealing-in frame 1, the width B of sealing-in frame 1 by 4～10 printings by method of printing on anode
1Be 1～10mm, height H
1Be 0.10～1.5mm, be distributed with several steam vents on it, this steam vent is and sealing-in frame vertical groove on horizontal plane, the spacing L of groove 2
1Be 10mm～100mm, the length L of groove 2
2Be 1～10mm, width B
2Be 3～10mm, low-melting glass slurry thickness H in the groove
2Be 0.10～1.5mm.For the level and smooth sealing surface of formation after sealing-in, sealing-in width of frame and long-pending length and the amassing of the interior low-melting glass slurry thickness of groove, the i.e. B that must equal groove of height
1H
1=L
2H
2, and be placed in 380 ℃～400 ℃ high temperature sintering 1.0 hours, reduce to room temperature and take out;
(2), sealing-in: on positive plate, arrange separaant and getter, aim at superimposedly with minus plate then, and clamp, put into vacuum drying oven and vacuumize, arrive 10 in vacuum degree with certain speed with special fixture
-3Begin heating during Pa, and with the sealing temperature curve sealing-in of Fig. 4, promptly from the room temperature to the strain point 320 ℃, heating rate is 9 ℃/min.To 380 ℃ of softening points, heating rate is 4 ℃/min from 320 ℃ of strain points.Insulation is 10 minutes in the time of 380 ℃.From 380 ℃ to 450 ℃, heating rate is 4 ℃/min.450 ℃ of insulations 20 minutes.Insulation finishes the rate of temperature fall cooling of back with 3 ℃/min.Whole heating curve designs at heating process medium viscosity-temperature curve according to glass powder with low melting point.In 320 ℃ of this section temperature ranges of strain point, low-melting glass does not also begin to soften in room temperature, mainly remains organic solvent and remove in this process, comprises the volatilization and the decomposition of organic solvent.Begin to soften at 320 ℃ to 380 ℃ low-melting glasses, organic solvent is most of volatilized or decomposition in this process, gas in the device constantly is discharged from by groove 2, and between 380 ℃ to 450 ℃, glass powder with low melting point melts fully, and soak into glass and metal electrode, form sealing-in, the gas in this process in the device is all discharged, and melt fully owing to the sealing-in frame this moment, make groove 2 complete obiterations, form the sealing-in frame of smooth atresia.
Claims (7)
1, a kind of non air exit hole sealing method of field emission display screen is characterized in that it comprises following steps:
(1), the making of sealing-in frame: a), glass powder with low melting point, binding agent and defoamer evenly are mixed with the low-melting glass slurry according to certain mixed; B), the low-melting glass slurry is transferred on the positive plate, form the sealing-in frame that is distributed with several steam vents by repeatedly printing; C), will reduce to room temperature after 1.0 hours at 380 ℃～400 ℃ high temperature sinterings with the positive plate of sealing-in frame takes out;
(2), on positive plate, arrange separaant and getter, then with the superimposed aligning of minus plate, and clamp with special fixture, put into vacuum drying oven again and vacuumize with certain speed, arrive 10 in vacuum degree
-3Begin heating during Pa, the room temperature taking-up is reduced in insulation after 20 minutes in the time of 450 ℃.
2, the non air exit hole sealing method of a kind of field emission display screen according to claim 1 is characterized in that the described low-melting glass slurry is transferred on the positive plate forms by 4～10 printings.
3, the non air exit hole sealing method of a kind of field emission display screen according to claim 1 is characterized in that described glass powder with low melting point, binding agent, defoamer are mixed uniformly by ball milling in 10: 0.70～0.90: 0.005～0.05 ratio.
4,, it is characterized in that described defoamer can adopt KNO according to the non air exit hole sealing method of claim 1 or 3 described a kind of field emission display screens
3, NH
3NO
3, BaO
2, Pb
3O
4In one or several mixing.
5, the non air exit hole sealing method of a kind of field emission display screen according to claim 1, it is characterized in that steam vent in the described sealing-in frame be one with sealing-in frame vertical groove on horizontal plane.
6, the low-melting glass slurry thickness is in a kind of non air exit hole sealing method of field emission display screen according to claim 1 or 5, the long-pending length that equals groove of the width that it is characterized in that described sealing-in frame and height and groove amasss, i.e. B
1H
1=L
2H
2
7, the non air exit hole sealing method of a kind of field emission display screen according to claim 6 is characterized in that the width B of described groove
2Be 3～10mm, low-melting glass slurry thickness H in the groove
2Be 0.1～1.5mm, length L
2Be 3～10mm, the spacing L of groove
1Be 10～100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410103210 CN1801432A (en) | 2004-12-31 | 2004-12-31 | Non air exit hole sealing method for field emission display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410103210 CN1801432A (en) | 2004-12-31 | 2004-12-31 | Non air exit hole sealing method for field emission display screen |
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| Publication Number | Publication Date |
|---|---|
| CN1801432A true CN1801432A (en) | 2006-07-12 |
Family
ID=36811324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410103210 Pending CN1801432A (en) | 2004-12-31 | 2004-12-31 | Non air exit hole sealing method for field emission display screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587808B (en) * | 2008-05-23 | 2011-06-08 | 清华大学 | Sealing device and sealing method of vacuum devices |
| US7966787B2 (en) | 2008-06-18 | 2011-06-28 | Tsinghua University | Vacuum device and method for packaging same |
| CN102436994A (en) * | 2011-12-14 | 2012-05-02 | 四川虹欧显示器件有限公司 | Sealing-in method of plasma display screen |
| US8484932B2 (en) | 2008-05-14 | 2013-07-16 | Tsinghua University | Vacuum device and method for packaging same |
-
2004
- 2004-12-31 CN CN 200410103210 patent/CN1801432A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8484932B2 (en) | 2008-05-14 | 2013-07-16 | Tsinghua University | Vacuum device and method for packaging same |
| CN101587808B (en) * | 2008-05-23 | 2011-06-08 | 清华大学 | Sealing device and sealing method of vacuum devices |
| US7966787B2 (en) | 2008-06-18 | 2011-06-28 | Tsinghua University | Vacuum device and method for packaging same |
| CN102436994A (en) * | 2011-12-14 | 2012-05-02 | 四川虹欧显示器件有限公司 | Sealing-in method of plasma display screen |
| CN102436994B (en) * | 2011-12-14 | 2014-12-10 | 四川虹欧显示器件有限公司 | Sealing-in method of plasma display screen |
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