A kind of manufacture method of barrier rib of plasma display panel
Technical field
The invention provides a kind of plasma display panel (plasma display panel, the manufacture method of barrier rib PDP) (rib).
Background technology
Plasma display panel is a kind ofly to produce luminous flat-panel screens by gas discharge, its maximum characteristic be light, thin, easily maximize and do not have the visual angle problem.Be provided with barrier rib in the plasma display panel, its function is being isolated as discharge isolation between each discharge cell (discharge cell) and visible light, and the support of front-back baseboard.The most difficult part promptly is the making of barrier rib in the present plasma display panel processing procedure, and the improvement of barrier rib processing procedure also just becomes the important topic of present industry research and development.
Please refer to Fig. 1 to Fig. 4, Fig. 1 to Fig. 4 is the known schematic diagram of making the barrier rib 12 of plasma display panel with sand-blast.The plasma display panel (not shown) includes a transparent panel (not shown), and a glass substrate 10 is located at this transparent panel rear side.As shown in Figure 1, known method of making barrier rib 12 with sand-blast (sandblasting), whole printing (solidprint) glass paste (glass paste) 2~3 times on the surface of glass substrate 10 at first is to form a glass paste bed of material 14.Then on the surface of the glass paste bed of material 14, stick one deck dry film photoresistance (dry film photoresist) 16.
After sticking dry film photoresistance 16, then carry out an exposure manufacture process, define the pattern of barrier rib 12.Exposure manufacture process is to see through a light shield (photo-mask) 18 to come glass substrate 10 irradiations one ultraviolet light 20, makes the dry film photoresistance 16 of part accept illumination and harden, with the design transfer of a chromium film 19 representatives on the light shield 18 to dry film photoresistance 16.As shown in Figure 2, carry out a developing manufacture process then, remove the dry film photoresistance 16 that is not shone by ultraviolet light 20.16 of dry film photoresistances that shone by ultraviolet light 20 remain on the glass paste bed of material 14, and its pattern promptly defines the pattern of barrier rib 12.
As shown in Figure 3, after developing manufacture process, carry out a sandblast processing procedure, the glass paste bed of material 14 that the dry film photoresistance that retains 16 can protection be hidden makes not to be retained the glass paste bed of material 14 that dry film photoresistance 16 hidden and removed by the sandblast processing procedure.Then, as shown in Figure 4, remove the dry film photoresistance 16 that retains, carry out burning till (firing) processing procedure again, glass substrate 10 is heated to 550 ℃, sinter a plurality of barrier ribs 12 into, so just finish the making of barrier rib 12 with the glass paste bed of material 14 that will retain.
The known sand-blast that utilizes is made barrier rib 12, can make the less and highly average barrier rib of width 12, is using dry film photoresistance 16 that its restriction is but arranged.The sandblast processing procedure be with sand grains at a high speed spraying to glass substrate 10, so dry film photoresistance 16 must closely fit with the glass paste bed of material 14, in order to avoid the sand grains that is ejected starts.In other words, dry film photoresistance 16 must be considered the conjugation of itself and the glass paste bed of material 14 in the use.But, if use dry film photoresistance 16, then after the sandblast processing procedure, must use suitable equipment, remaining dry film photoresistance 16 is removed fully.Therefore, in the material selection of dry film photoresistance, need to select and glass paste applying degree height, to the tolerance height that the sandblast sand grains destroys, the material that the while removes after the sandblast processing procedure is finished easily.Thus, certainly will increase the complexity and the cost of processing procedure.
Please refer to Fig. 5 and Fig. 6, Fig. 5 and Fig. 6 are the known schematic diagram of making the barrier rib 12 of plasma display panel with the wire mark legal system.Known wire mark method (screen print) is equally barrier rib 12 to be produced on the surface of glass substrate 10.As shown in Figure 5, the wire mark method is to utilize a scraper (scraper) 22, a glass paste 13 is seen through a half tone 24 be printed on the presumptive area of glass substrate 10.
As shown in Figure 6, repeat above-mentioned steps about 6~12 times, glass paste 13 is repeated to cover the surface of glass substrate 10, make the constantly overlapping predetermined altitude that is accumulated to of height of glass paste 13, for example, 150~200 millimicrons (μ m).Carry out burning till processing procedure at last, glass substrate 10 is heated to 500~600 ℃ temperature, make glass paste 13 clinkerings of an accumulation barrier rib 12 that pluralizes, promptly finish making as the barrier rib 12 of Fig. 4.
Known when making barrier rib 12 with the wire mark method merely, though can avoid using the dry film photoresistance can reduce the consumption of glass paste simultaneously, but, make the wire mark method can't be applied in the higher plasma display panel of precision because multi-sheet printed accuracy is difficult for grasping.Because multi-sheet printed accuracy is difficult for grasping, makes the simple wire mark method of using be difficult for forming the less barrier rib 12 of width, and then have influence on the resolution (resolution) of plasma display panel.In addition, more production time and the process complexity of not only increasing of print pass, the height of formed barrier rib 12 is also also inconsistent.
Summary of the invention
The characteristic of the manufacture method of barrier rib of the present invention is formerly utilized the screen painting processing procedure, the black paste 46 that will contain curing agent is printed on pulp layer 42 surfaces and goes up another pulp layer 50 of formation, and then carry out exposure manufacture process and make pulp layer 50 sclerosis, carry out sandblast and heating processing at last, to finish barrier rib 32.The inventive method need not be developed and photoresistance is removed processing procedure, and the requirement of also visual barrier rib width determines whether using light shield, so manufacture method of the present invention can reduce process complexity, shortens the processing procedure time and save cost.In addition, but the hardened material that uses of the present invention is shade, need not use the dry film photoresistance, and black paste 46 of the present invention, its material composition that is used to constitute barrier rib is roughly identical with pulp layer 42, therefore can promote the conjugation of black paste 46 and pulp layer 42, further avoid it in the sandblast processing procedure, to be started by sand grains.
Compared to known sand-blast, manufacture method of the present invention needn't be developed and the dry film photoresistance is removed processing procedure, and can avoid the use of light shield, therefore can significantly simplify processing procedure and save cost.In addition, the present invention adds the pattern that curing agent defines barrier rib with glass paste, utilizes two close materials to promote conjugation, the problem that can avoid known dry film photoresistance 16 to peel off.And compared to known wire mark method, the inventive method significantly reduces print pass, can significantly simplify processing procedure equally and save cost.And the inventive method only carries out the screen painting processing procedure one time, can improve the shortcoming of the not good and barrier rib height inequality of known multi-sheet printed precision, to make width and height barrier rib uniformly.
Therefore main purpose of the present invention is to provide a kind of manufacture method of barrier rib of plasma display panel, improves the shortcoming of known sand-blast and wire mark method.
The present invention relates to:
(1) a kind of manufacture method of barrier rib of plasma display panel, this plasma display panel includes a glass substrate, and this manufacture method includes the following step:
Carry out whole printing process, first pulp layer is printed on the surface of dielectric layer;
Carry out the screen painting processing procedure, printing forms second pulp layer on first presumptive area on this first pulp layer surface, and the composition of this second pulp layer includes glass powder, the photosensitive hardening agent, cement and solvent, described this first and second pulp layer all includes identical barrier rib material;
Carry out exposure manufacture process,, make the curing agent of this second pulp layer produce reaction, and then make this second pulp layer sclerosis with this second pulp layer of UV-irradiation;
Carrying out the sandblast processing procedure, is shade with this second pulp layer that has hardened, and removes this first pulp layer that this first presumptive area is not covered by this second pulp layer outward; And
Carry out heating processing, to remove the curing agent in this second pulp layer, wherein this heating processing sinters this first and second pulp layer into barrier rib;
(2) manufacture method described in (1), wherein this photosensitive hardening agent system includes polyethylene-phenyl propylene ester;
(3) manufacture method described in (1), wherein this exposure manufacture process system utilizes light shield, one of makes in this second pulp layer the exposure of second presumptive area, and the width system of this second presumptive area is less than this first presumptive area;
(4) manufacture method described in (1), wherein this cement system includes ethyl cellulose and poly-ethyl alcohol;
(5) manufacture method described in (1), wherein this solvent includes terpineol and acetate butyl card must ester.
Description of drawings
Fig. 1 to Fig. 4 is the known schematic diagram of making the barrier rib of plasma display panel with sand-blast.
Fig. 5 and Fig. 6 are the known schematic diagram of making the barrier rib of plasma display panel with the wire mark legal system.
Fig. 7 is the schematic diagram of the barrier rib of the plasma display panel of the present invention's making.
Fig. 8 to Figure 11 is the processing procedure schematic diagram of the present invention's making as the barrier rib of Fig. 7.
Figure 12 and Figure 13 make the processing procedure schematic diagram of another embodiment of barrier rib for the present invention.
Illustrated symbol description
30 glass substrates, 32 barrier ribs
34 electrodes, 36 dielectric layers
38 white slurry, 40 black pastes
42 pulp layers, 44 scrapers
46 black pastes, 48 half tones
50 pulp layers, 52 ultraviolet lights
54 light shields, 56 barrier ribs
Embodiment
Please refer to Fig. 7, Fig. 7 is the schematic diagram of the barrier rib 32 of the plasma display panel of the present invention's making.The plasma display panel (not shown) includes a transparent panel (not shown), and a glass substrate 30 is located at this transparent panel rear side.As shown in Figure 7, manufacture method of the present invention is that a plurality of barrier ribs 32 are made on the glass substrate 30.The surface of glass substrate 30 is provided with plurality of electrodes 34 and is used for causing discharge, and a dielectric layer (overcoat dielectric layer) 36 covers the top of glass substrate 30 and electrode 34, is used for guard electrode 34.
Please refer to Fig. 8 to Figure 11, Fig. 8 to Figure 11 is the processing procedure schematic diagram of the present invention's making as the barrier rib 32 of Fig. 7.As shown in Figure 8, the manufacture method of barrier rib of the present invention is carried out earlier one first printing process on the glass substrate 30 with electrode 34 and dielectric layer 36, one whole printing process for example, the whole face of first pulp layer is printed on the surface of dielectric layer 36, and first pulp layer can comprise a white slurry 38 and a black paste 40.Whole printing process is printing white slurry 38 about 3~6 times earlier, and then the process black slurry is 40 about 1~2 time, makes the white slurry 38 and the height of black paste 40 be accumulated to a predetermined altitude, to form a pulp layer 42 that can form barrier rib 32.
As shown in Figure 9, after whole printing, carry out one second printing process again, normally a screen painting processing procedure.Aforementioned processing procedure is to utilize a scraper 44, a black paste 46 is seen through a half tone 48 be printed on one first presumptive area on pulp layer 42 surfaces, to form a plurality of pulp layers 50.The composition of pulp layer 50 includes a glass powder (glass powder), photosensitive hardening agent (photo-activehardener), a cement and a solvent.This photosensitive hardening agent can be polyethylene-phenyl propylene ester (poly vinyl cinnamate), and cement can comprise ethyl cellulose and poly-ethyl alcohol (PVA), and solvent can use terpineol (terpineol, C
10H
17OH) and acetate butyl card must ester (butyl carbitalacetate, acetate butyl (2-2 ethoxy ethyoxyl) ethyl ester).That is to say that pulp layer 50 has the barrier rib material identical with pulp layer 42, more add the material that pulp layer 50 is hardened because of sensitization in addition.
As shown in figure 10, after the screen painting processing procedure, then carry out an exposure manufacture process, with a ultraviolet light 52 direct irradiation pulp layers 50.Curing agent in the pulp layer 50 can be subjected to light and produce reaction, and then makes pulp layer 50 sclerosis, and its pattern is the pattern as the barrier rib 32 of Fig. 7.As shown in figure 11, finish after the exposure manufacture process, then carry out a sandblast processing procedure, to remove outside first presumptive area pulp layer 42 parts that the pulp layer 50 that is not hardened is covered.Because the pulp layer 50 of sclerosis can be kept out the friction of sand grains, therefore do not need to use the dry film photoresistance in the present invention, also just can avoid using many shortcomings of dry film photoresistance.
Carry out a heating processing at last, whole glass substrate 30 is heated to temperature between 500~600 ℃, make the pulp layer 42,50 that retains sinter a plurality of barrier ribs 32 into, as shown in Figure 7.Because curing agent is a kind of macromolecular material, therefore meeting decomposes when high temperature can remove the curing agent in the pulp layer 50 simultaneously in heating processing, can not influence the formation of barrier rib 32.Barrier rib 32 lower floors that complete are made of white slurry 38, can increase the luminosity of the phosphor body (phosphor) of 32 of each barrier ribs, and barrier rib 32 upper stratas are to be made of 40,46 of black pastes, then can promote the color contrast (contrast ratio) of the phosphor body of 32 of each barrier ribs.
Because black paste 46 has contained the barrier rib material that forms barrier rib, therefore in order to simplify processing procedure, in aforesaid whole printing process, can process black slurry 40, directly on white slurry 38, print the black paste 46 that contains the photosensitive hardening agent, thus, can form the barrier rib 32 of levels different colours at last equally.That is to say, in whole printing process, can only print white slurry 36, and black paste 40 can decide optionally, whether need to print or directly replace the function of black paste 40 with black paste 46.
As Figure 12 and shown in Figure 13, Figure 12 and Figure 13 make the schematic diagram of another embodiment of barrier rib 32 for the present invention.In manufacture method of the present invention, if will further make the less barrier rib of width 32, can when exposure manufacture process, between ultraviolet source and glass substrate 30, add a light shield 54, the position and the area that expose on can explication pulp layer 50.Therefore, in exposure manufacture process, behind the adding light shield, one second presumptive area exposure on the pulp layer 50 is only arranged, and the width of this second presumptive area is less than the width of this first presumptive area.After through the sandblast processing procedure, can produce the less barrier rib of width 56, as shown in figure 13.
The above preferred embodiment only of the present invention, all even grades of doing according to claim of the present invention change and modification, all should belong to the covering scope of patent of the present invention.