JP2002083551A - Back substrate of plasma display panel, its manufacturing method, and plasma display panel and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide clear display without impairing ease of manufacturing and driving even when the structures of meandering ribs are reinforced so as to prevent the ribs from being deformed in a baking process. SOLUTION: In this triangular-arrangement type PDP(plasma display panel) substrate having the meandering ribs, in order to prevent the ribs from being deformed in baking, the distance between ribs is periodically made smaller than a constant value so that discharge light emission and a phosphor embedding process can be carried out without any change. By forming a rib material on a bottom part of a gap between ribs, deformation due to contraction in baking is reduced. A top part of each rib may be polished when necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter abbreviated as "PDP") which is an image display device utilizing gas discharge, and includes a rear substrate and an entire plasma display panel (both front and rear substrates). ) And their manufacturing methods.

[0002]

2. Description of the Related Art In recent years, large displays have become widespread as image display devices, but conventional CRT displays have become heavy with the increase in size of cathode ray tubes. On the other hand, several years ago, a color plasma display was announced and marketed as a thin and large-screen display by several electric companies. (Den Shinoda, “AC Plasma Display Panels <Expectation for low cost and large size with simple structure>”), Electronics Technology, v
ol. 7 (1996) pp. 63-67) and the like. Two types of color plasma displays, DC type color plasma display and AC type color plasma display, have been commercialized. However, the DC type color plasma display has a complicated structure of the discharge cell, and the yield of the panel at the time of production is poor, which is not linked to mass production. On the other hand, the AC-type plasma display has a simple structure of the discharge cells and can be mass-produced.

The AC type color plasma display is roughly divided into a counter discharge type panel in which display discharge is performed between electrodes of a rear glass substrate and a front glass substrate and a display discharge is performed by a display electrode pair of the front glass substrate. There are two types of structures, three-electrode surface discharge panels.

[0004] Applying a phosphor, which is indispensable for a color display, in an area as large as possible in a discharge cell leads to higher brightness and higher efficiency, and protects the phosphor from ion bombardment during AC display discharge and deteriorates. Prevention leads to a longer panel life. In the three-electrode surface-discharge type panel invented by Shinoda et al., The phosphor is not formed on the front glass substrate so as not to receive ion bombardment at the time of the AC display discharge.
It is widely applied on the ribs and the back glass substrate (including on the address electrode), and the surface area of the phosphor is increased and the luminous efficiency is improved as compared with the opposed discharge type panel that cannot be applied on the electrode due to the phosphor degradation. This is a very advantageous point (T.
Shinoda et. al. , "Developme
nt of Technologies in Large
e-Area Color ac Plasma Di
sprays, "SID 1993 pp. 161-1
64 (1993). ). Also, the phosphor can be applied without color mixing because the RGB is separately applied by using the rib as a deep bank. There is no need for a step of removing the phosphor of the electrode as in the case of the opposed type. Further, in the case of the opposed type, the phosphor residue degrades the stability of display discharge.

For the above reasons, AC three-electrode surface-discharge type color plasma displays have been mass-produced among thin large-screen plasma displays at present.
In nine years, about 100,000 units have been sold annually. C
Since it is thinner and lighter than RT, it is used as a display terminal for display for the purpose of saving space, and is mainly used for business purposes such as a display for an exhibition.

However, as compared with the CRT, problems such as insufficient brightness and high power consumption in image quality have not been solved, and thus the display has not yet been recognized as a new display.

When the rib structure has a stripe shape, in the rib extension direction without a partition, adjacent pixels that should not emit light because they are not closed spaces do not emit light (light emission leakage). The electrode spacing is wide. For this reason, the non-light emitting area between the pixels in the rib extension direction becomes large, and the light emitting area of the phosphor becomes small, so that the luminance of the panel becomes low.

Therefore, a simple structure which is easy to manufacture is abandoned and a surface discharge type PDP having a complicated structure is being developed again. In June 1999, a PDP having a waffle structure was commercialized. At the beginning of development, this waffle structure had problems such as no exhaust path, a large capacitive coupling component between the address electrode and the discharge electrode, and an increase in the amount of power.When mass-producing, the waffle structure was modified into a ladder-like rib shape. It is reported to have a structure having.
(T. Komaki et. Al., "Highlum.
innce AC-PDPs with Waffl
e-structured Barrier Rib
s "IDW'99 pp. 587-590 (199
9). ).

The phosphor application area is larger and brighter than the conventional PDP having linear ribs invented by Shinoda et al. However, in order to solve the above-described problem of capacitive coupling, a cell is required. Became smaller, and there was no significant improvement over the conventional PDP.

Separately, in IDW'99, Beshii et al. Published a PDP using meander ribs (meandering ribs), and the luminous efficiency has been greatly improved. (T. Koma
kiet. al. , "High luminance
AC-PDPs withWaffle-structure
ured Barrier Ribs ”IDW'99
pp. 599-602 (1999). JP-A-9-
No. 50768) This panel structure is shown in FIGS. It has long been known that the larger the plasma cell is, the better the luminous efficiency is. For a surface discharge type PDP, the hexagonal cell having a honeycomb structure has the largest cell. Such a cell structure is described in JAPAN DISPLAY '92 (K.N.
unomura, et. al. , "A 19-in.-
Diagonal Full-Color AC Pla
Nunomura et al. have published and demonstrated this in sma TV-Display ").

However, the fact that the above honeycomb structure PDP has not been put to practical use has the following problem in that it is difficult to manufacture a panel. One problem is that since soda-lime glass for window glass is used for manufacturing, shrinkage occurs when a pattern is formed on the front plate and the back plate and baked, making alignment difficult. In addition, there is no exhaust path, and there is a problem that it takes too much time to exhaust and fill the discharge gas after sealing the panel. It was sometimes difficult to apply different phosphors.

At present, a high strain point glass having a small firing shrinkage (for example, PD200 manufactured by Asahi Glass Co., Ltd.) has been developed for PDPs, and the dimensions of the front substrate and the rear substrate can be controlled, so that the alignment problem can be solved. It is getting. Meandering ribs are effective in securing the path for exhaust / gas filling. Also, in screen printing at the time of separately applying the phosphors, there is a good embedding property because there is a bubble escape path.

The above-described rib structure is formed by a manufacturing method such as a sandblasting method, a paste embedding method, a screen printing method, a photosensitive paste method, a pressing method, and an intaglio transfer method.

In any of the manufacturing methods, as a material to be a rib, a paste obtained by kneading a glass frit having a low melting point, an aggregate made of ceramic powder, a binder resin as a shape retaining agent, a solvent for adjusting viscosity, and the like are mainly used. Can be When forming the rib structure by each method, the solvent is usually dried. Thereby, the volume of the paste is reduced. The mechanism for maintaining the rib shape varies depending on the manufacturing method, but in all cases, the resin as the binder plays an important role. The mechanism of the effect as a binder includes curing by drying of a solvent, thermal curing, and ultraviolet curing.

In any case, at this stage:
Except for cost and throughput issues, it is not possible to form ribs with periodic meandering ribs as shown in FIGS. 1 and 2 corresponding to 360 μm pitch address electrodes, except for the sharpness of the pattern. It is possible.

In the PDP, it is necessary to prevent gas from being emitted from the inside of the panel. Therefore, when firing the rib, it is necessary to sufficiently remove the binder. Since the binder resin at this time disappears, the rib temporarily becomes porous. At this stage, the rib shape at the time of pattern formation is generally maintained. As it is, it is very brittle and cannot be used as a panel.

It is necessary to further raise the temperature to soften and flow the low-melting glass frit and to sinter it using the aggregate as a core. In this baking process, the volume of shrinkage occurs remarkably in the entire rib pattern due to the binder removed from the rib material and the low melting point glass frit having fluidity. Due to the volume shrinkage at this stage, the volume becomes about 60%.

The bottom of the rib is in contact with the glass substrate or a dielectric layer formed on the glass substrate, and receives a tensile stress from the glass substrate as an external force, so that there is not much change from the time of pattern formation. To receive no external force. As a result, the shape changes to a point where the internal stress due to volume shrinkage and the external force are balanced. The amount of deformation is mainly the viscosity and firing temperature during firing,
Determined by time keeping. In the linear rib pattern, the direction of the internal stress due to volume shrinkage coincides with the direction of the rib. Even if the rib height is 80%, the top shape is about 80% and the bottom is about 90%. In the rib direction, the shrinkage is 0%.

On the other hand, in the delta shape, the bottom receives external stress from the glass substrate, but the other is free space and is not subjected to external stress. I do. As a result, FIGS. 3 and 4
The top will be shifted inside the meander like. In extreme cases, it is a straight rib. If the adhesion to the glass substrate or the dielectric is poor, a slip with the rib pattern occurs, and the bottom of the rib is also pulled inward. These degrees vary depending on the particle size distribution and the mixing ratio of the ceramic powder used as the aggregate filler. The degree also depends on whether an amorphous or crystalline glass frit is used. Further, the degree is also different by mixing a plurality of glass frit having different softening points and deformation points.

For this reason, the current panel is almost straight compared to the meandering rib in design, and there is room for improvement in terms of improving the performance of the panel.

[0021]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a plasma display panel provided with a reinforcing pattern for maintaining the shape of a rib so as not to fall even after firing. And a method for manufacturing the same. In particular, in a triangular array type plasma display panel having meandering ribs capable of making each discharge cell space larger, a plasma display panel provided with a reinforcing pattern or the like so that the meandering ribs do not tilt even after firing. And a method for producing the same.

[0022]

According to the first aspect of the present invention, there is provided a rear substrate of a plasma display panel, comprising a rib and a reinforcing pattern at the bottom of the rib.

According to a second aspect of the present invention, there is provided the rear substrate of the plasma display panel according to the first aspect, wherein the rib is a meandering rib.

According to a third aspect of the present invention, in the plasma display panel according to the second aspect, the reinforcing pattern is formed only in a lower portion of a space having a small rib interval which hardly contributes to light emission. It is a back substrate.

The invention according to claim 4 is the back substrate of the plasma display panel according to claim 2, wherein the reinforcing pattern is formed entirely except on the address electrodes.

According to a fifth aspect of the present invention, the reinforcing pattern is formed so as to connect the lower layers of the meandering ribs for maintaining the maximum width of each discharge cell with a straight line having the shortest distance. 3. A rear substrate of the plasma display panel according to 2.

According to a sixth aspect of the present invention, in the plasma display according to the second aspect, the reinforcing pattern is formed so as to connect a straight line to a cross between substantially the centers of the discharge cells. This is the rear substrate of the panel.

The invention according to claim 7 is the back substrate of the plasma display panel according to claim 2, wherein the reinforcing pattern is formed on both sides of the lower layer adjacent to the discharge cell. .

An eighth aspect of the present invention is a back substrate of a plasma display panel, wherein a cutout pattern is formed at the top of a rib.

According to a ninth aspect of the present invention, in the back substrate of the plasma display panel according to the eighth aspect, the rib is a meandering rib.

The tenth aspect of the present invention is the first to seventh aspects.
A method for manufacturing a rear substrate of a plasma display panel according to any one of the above, wherein an address electrode on the substrate,
A method for manufacturing a rear substrate of a plasma display panel, comprising forming a dielectric, forming the reinforcing pattern on the dielectric, and then forming a rib thereon.

The eleventh aspect of the present invention relates to the first to seventh aspects.
A method for manufacturing a rear substrate of a plasma display panel according to any one of the above, wherein an address electrode on the substrate,
A method of manufacturing a rear substrate of a plasma display panel, wherein the reinforcing pattern is formed after forming a dielectric and a rib.

According to a twelfth aspect of the present invention, there is provided a method of manufacturing a rear substrate of a plasma display panel according to the eighth or ninth aspect, wherein an address electrode and a dielectric are formed on the substrate. A method of manufacturing a back substrate of a plasma display panel, comprising forming a top notch pattern after forming a rib thereon.

[0034] The invention according to claim 13 is the invention according to claims 1 to 9
A method for manufacturing a rear substrate of a plasma display panel according to any one of the above, wherein an address electrode on the substrate,
A method for manufacturing a rear substrate of a plasma display panel, comprising forming a dielectric and forming a rib thereon at the same time as the reinforcing pattern or the top notch pattern.

According to a fourteenth aspect of the present invention, there is provided a method of manufacturing a back substrate of a plasma display panel according to the thirteenth aspect, wherein an intaglio is formed as a method of forming a rib simultaneously with the reinforcing pattern or the top notch pattern. A method for manufacturing a rear substrate of a plasma display panel, which uses a transfer method.

The invention described in claim 15 is the invention according to claims 1 to 9
The method for manufacturing a rear substrate of a plasma display panel according to any one of claims 1 to 3, wherein after forming an address electrode on the substrate, a rib is formed simultaneously with the dielectric and the lower reinforcing pattern or the top notch pattern. A method for manufacturing a rear substrate of a plasma display panel, characterized by the above-mentioned.

The invention according to claim 16 is based on claim 15.
A method for manufacturing a back substrate of a plasma display panel according to claim 1, wherein an intaglio transfer method is used as a method for forming a rib simultaneously with the dielectric and the reinforcing pattern or the top notch pattern. This is a method for manufacturing a back substrate.

The invention described in claim 17 is the invention according to claims 1 to 7
The method for manufacturing a back substrate of a plasma display panel according to any one of the above, wherein after forming an address electrode on the substrate, a rib is formed after simultaneously forming a dielectric and the reinforcing pattern. This is a method for manufacturing a back substrate of a plasma display panel.

The invention described in claim 18 is the invention according to claims 1 to 9
The plasma display panel according to any one of the above, wherein the rear substrate and the front substrate of the plasma display panel are bonded together.

The invention according to claim 19 is the invention according to claim 10
17. A method for manufacturing a plasma display panel, comprising: manufacturing a rear substrate by the method for manufacturing a rear substrate of a plasma display panel according to any one of 17); and bonding the rear substrate and the front substrate together.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the structure of a rear substrate of a plasma display panel will be described in the present invention.

In the first aspect, the ribs are currently known "stripe ribs", "cross ribs", "honeycomb ribs", "waffle ribs", and "meandering ribs" (see the description of "prior art"). However, as long as the ribs form the discharge cells, the ribs are not limited to these shapes and may be anything.

In claim 1, the bottom of the rib means both the portion between the rib and the glass substrate and the portion below the rib (the side of the glass substrate on the back substrate). Pointing to.

In the first aspect, the reinforcing pattern may be any pattern as long as it has a function of preventing the rib from falling down.

For example, with respect to a stripe rib, a form in which both ends of the rib bottom are wider than the top of the rib so as to make the rib cross section convex may be used as a reinforcing pattern. Further, this pattern may be provided in the entire length direction of the stripe, may be provided in a part thereof, or may be provided at regular intervals.

The reinforcing pattern may be regularly provided in a ladder shape so as to connect the stripe ribs.

In the cross-ribbed ribs, the reinforcing pattern may be formed by making both ends of the rib bottom wider than the upper part of the rib so that the cross section of the rib becomes convex. In addition, a reinforcing pattern may be provided in a cross shape at the center of the cell surrounded by the girder.

Also in the case of the honeycomb rib, it is conceivable that the both ends of the rib bottom are wider than the upper part of the rib so as to form a reinforcing pattern so that the rib cross section becomes convex. In addition, a configuration in which one, two, or three reinforcing patterns are provided so as to connect opposed rib sides can be considered.

Also in the waffle rib, it is conceivable that the both ends of the rib bottom are wider than the upper part of the rib so as to form a reinforcing pattern so that the rib cross section becomes convex.

In claim 2 of the present invention, the "back substrate of the plasma display panel having meandering ribs" is, for example, as shown in FIG. 1 (as viewed from above).
A back substrate of a plasma display panel, wherein uneven serpentine ribs are arranged so as to form hexagonal discharge cells. In FIG. 1, the RGB cells are
Although the shape is rectangular, the size of the RBG cell may be changed for each cell in order to improve the emission characteristics of the discharge without being limited to this figure.

The reinforcing patterns for the meandering ribs have the shapes shown in FIGS. 5 to 14, respectively. That is, the cross section formed between the meandering ribs shown as the reinforcing pattern 70 in FIGS. 5 and 6 is a rectangular pattern,
This is a stripe-shaped (cross-section rectangular) pattern formed below the meandering rib shown as a reinforcement pattern 71 in FIGS. 7 and 8, and a stripe-shaped (cross-section rectangular) pattern shown as a reinforcement pattern 72 in FIGS. And FIG.
This is a pattern formed in a cross-section (rectangular section) so as to connect the centers of the discharge spaces shown as reinforcement patterns 73 in FIGS. 1 and 12, and below the serpentine ribs shown as reinforcement patterns 74 in FIGS. This is a rectangular pattern (having a rectangular cross section) formed under the rib formed obliquely as viewed from above. Further, the reinforcing pattern is not limited to these shapes, and may be any shape as long as it is formed at the bottom of the rib and has a function of preventing the rib from falling down.
Even if these reinforcement patterns are formed simultaneously with the meandering ribs,
It may be formed separately from the meandering rib. With the reinforcing pattern, it is possible to prevent the rib from falling due to rib contraction when the rib is fired.

In claim 8, "cutting pattern"
15 and 16 is a pattern having a triangular missing portion when viewed from above as shown in FIGS.
6) can be adopted. However, the shape is not limited to this, and any shape may be used as long as the meandering rib is formed so that when the meandering rib is fired, the meandering rib is cut at the cutout portion and the meandering rib releases the force to straighten. But it is good. The depth of the cutout can also be appropriately designed within a range in which the above-mentioned action appears.

The ribs other than the meandering ribs may have any shape as long as the ribs are cut at the notch portions during firing and the ribs are formed so as to release the force for straightening. .

Next, an embodiment of a method for manufacturing a rear substrate of a plasma display panel according to the present invention will be described.

As the respective materials (members) of the glass substrate, the address electrode, the dielectric, and the ribs constituting the rear substrate, those known at present can be used.

As a method of forming the address electrode and the dielectric, those known at present can be appropriately adjusted and used.

The ribs may be formed by sandblasting (see JP-A-10-283938), paste embedding method (see JP-A-11-7126), screen printing (see JP-A-5-101776), photosensitivity. Paste method (see JP-A-6-295676), press method (see JP-A-2000-98352), intaglio transfer method (see JP-A-2000-98352)
000-30606) can be used after being appropriately adjusted.

Next, embodiments of the material of the reinforcing pattern and the method of forming the same will be described. The material and forming method of the reinforcing pattern may be basically the same as the material and forming method of the rib. However, as long as a reinforcing pattern having the above-described shape can be formed, the rib material and the forming method may be different.

Next, embodiments of the material of the notch pattern and the method of forming the same will be described. The material and forming method of the notch pattern may be basically the same as the material and forming method of the rib. Also in the case of the notch pattern, the rib material and the forming method may be different as long as the notch pattern having the above-described shape can be formed.

Next, an embodiment will be described with respect to the order of forming the dielectric, the reinforcing pattern, the notch pattern, and the rib. As described in claims 10 to 17, the order can be taken, but the order is not limited to these as long as each member is appropriately formed.

An embodiment in which "dielectric, reinforcing pattern or notch pattern, rib" is simultaneously formed using the intaglio transfer method according to claim 16 will be described.

First, the pattern of the concave portion of the intaglio is appropriately designed so as to also have a concave portion corresponding to the reinforcing pattern or the notch pattern, and the intaglio is manufactured. The material of “dielectric, reinforcing pattern or notch pattern, rib” is the same as the rib forming material. Then, after these materials are filled in the intaglio and cured, they are bonded to the glass substrate on which the address electrodes have been formed, and the adhesive is cured and transferred. Examples of the curing mode include a mode of curing by ionizing radiation such as ultraviolet rays and a mode of curing by heat, but are not limited thereto. Examples of the mode of curing the adhesive include, but are not limited to, a mode of curing by ionizing radiation such as ultraviolet rays and a mode of curing by heat. Although an example in which the filling material is bonded to the glass substrate after curing is described here, the filling material may be bonded to glass without using an adhesive, and then cured and transferred using the curing method described above.

As described above, the intaglio transfer method uses “dielectric,
Since the "reinforcement pattern or the notched pattern rib" can be formed at the same time, the cost can be reduced by shortening the process, and it is more suitable for forming the plasma display rear substrate than various rib forming methods.

Next, an embodiment of the whole plasma display panel in which the front substrate and the rear substrate are bonded will be described. As the front substrate of the plasma display panel, a known front substrate as a front substrate of the plasma display panel at present can be adopted. further,
As a method for manufacturing the entire plasma display panel, a currently known method (sealing a front substrate and a rear substrate to form a discharge space, exhausting the gas, and then filling a discharge gas) can be used.

[0065]

The present invention will be described below with reference to examples.

<Example 1> A method of manufacturing a back substrate (FIG. 5 as a top view and FIG. 6 as a cross-sectional view) of a plasma display panel having a meandering rib on which a reinforcing pattern according to claim 3 is formed. Produced by The details will be described below.

Asahi Glass PD200 was used for the glass substrate, and after annealing, a pattern was formed with a photosensitive Ag paste (TR3954) made of Taiyo Ink and baked.
(360 μm pitch, 40 μm width, 4 μm thickness)

A matrix shown in FIG. 5 as a top view and FIG. 6 as a sectional view is manufactured by cutting, etching and electroforming. (Rib height 150 μm, rib top width 50 μm, discharge cell opening width 550 μm, non-discharge cell 70 μm width, bottom reinforcement pattern 50 μm height, width 70 μm) From this mother die, a silicone rubber intaglio was prepared by a casting method. The photosensitive layer paste was applied to the intaglio plate using a
It was embedded so as to have a constant μm.

The glass substrate with an Ag electrode and the intaglio plate with the photosensitive ribs embedded therein were aligned, and were exposed to ultraviolet light (500 mJ / cm ² ) from the glass side using a high-pressure mercury lamp.
After the rib material was cured, it was peeled off and fired.

As a result, the rib height was 120 μm, the rib top width was 35 μm, the discharge cell opening width was 560 μm, and the non-discharge cells 9
0 μm width, bottom reinforcement pattern 40 μm height, width 90 μm
It became. The flatness of the rib top was also good, ± 5 μm. When the inclination is within 3 degrees, it can be used for a PDP panel. The dielectric layer had a thickness of 10 μm after firing.

<Embodiment 2> A method of manufacturing a back substrate (FIG. 7 as a top view and FIG. 8 as a cross-sectional view) of a plasma display panel having meandering ribs on which a reinforcing pattern according to claim 4 is formed. Produced by The details will be described below.

Asahi Glass PD200 was used as the glass substrate, and after annealing, a pattern was formed with a photosensitive Ag paste (TR3954) made of Taiyo Ink and baked.
(360 μm pitch, 40 μm width, 4 μm thickness) A dielectric glass paste was printed by a screen printing method and fired. (Thickness after firing: 10 μm)

After the application of the photosensitive paste, a reinforcing pattern having a height of 50 μm, a width of 310 μm and a pitch of 3
Exposure and development were performed using a glass mask to form a lower reinforcing pattern.

Similarly, meandering ribs were formed by the photosensitive paste method. (Rib height 150 μm, rib top width 5
0 μm, discharge cell opening width 550 μm, non-discharge cell 70 μm
m width, bottom reinforcement pattern 50μm height, width 70μm)

When the shape was measured after baking this substrate, the rib height was 120 μm, the rib top width was 35 μm, the notch minimum width (the width of the rib where the rib width of the portion where the notch was formed was the smallest) ) 10 μm, discharge cell opening width 560 μm, non-discharge cell 90 μm width, bottom reinforcement pattern 40 μm height, width 90 μm. The flatness of the rib top was also good, ± 5 μm. When the inclination is within 3 degrees, P
It can be used for DP panels.

<Third Embodiment> A back substrate of a plasma display panel having meandering ribs on which a reinforcing pattern according to claim 5 is formed (FIG. 9 as a top view and FIG.
0) was manufactured by the manufacturing method according to claim 10. The details will be described below.

Asahi Glass PD200 was used as the glass substrate, and after annealing, a pattern was formed with a photosensitive Ag paste (TR3954) made of Taiyo Ink and baked.
(360 μm pitch, 40 μm width, 4 μm thickness) A dielectric glass paste was printed by a screen printing method and fired. (Thickness after firing: 10 μm)

After the application of the photosensitive paste, a reinforcing pattern and a lower meandering rib (reinforcing part height 50 μm, width 5
0 μm) Exposure was performed using a glass mask, and development was performed to form a lower layer pattern.

Similarly, meandering ribs were formed by the photosensitive paste method. (Rib height 150 μm, rib top width 5
0 μm, discharge cell opening width 550 μm, non-discharge cell 70 μm
m width, bottom reinforcement pattern 50μm height, width 70μm)

When the shape was measured after baking this substrate, the rib height was 120 μm, the rib top width was 35 μm, the discharge cell opening width was 560 μm, the non-discharge cells were 90 μm wide, and the bottom reinforcing pattern was 40 μm high and 90 μm wide. The flatness of the rib top was also good, ± 5 μm. When the inclination is within 3 degrees, it can be used for a PDP panel.

<Fourth Embodiment> A back substrate (FIG. 15 as a top view and FIG. 16 as a cross-sectional view) of a plasma display panel having meandering ribs formed with notch patterns according to claim 8 is manufactured based on claim 12. It was produced by the method. The details will be described below.

Asahi glass PD200 was used for the glass substrate, and after annealing, a pattern was formed with a photosensitive Ag paste (TR3954) made of Taiyo Ink and baked.
(360 μm pitch, 40 μm width, 4 μm thickness) A dielectric glass paste was printed by a screen printing method and fired. (Thickness after firing: 10 μm)

After applying the photosensitive paste, exposure is performed using a glass mask for a meandering rib (rib height 100 μm, rib top width 50 μm, discharge cell opening width 550 μm, non-discharge cell 70 μm width), development is performed, and the lower layer is developed. Was formed.

Similarly, the upper cutout pattern of the meandering rib was formed by the photosensitive paste method. (Notch pattern 50μm height, width 30μm)

When the shape was measured after baking this substrate, the rib height was 120 μm, the rib top width was 35 μm, the discharge cell opening width was 560 μm, the non-discharge cells were 90 μm wide, and the bottom reinforcing pattern was 40 μm high and 90 μm wide. The flatness of the rib top was also good, ± 5 μm. When the inclination is within 3 degrees, it can be used for a PDP panel.

<Embodiment 5> A method of manufacturing a whole panel by sealing a front substrate and a rear substrate will be described. ITO is formed on the front glass substrate to a thickness of 200 nm by a vapor deposition method, and is patterned as a display electrode by a photolithography method.
(Pitch: 540 μm, width: 180 μm) Next, a photosensitive Ag paste is applied, patterned as a bus electrode by a photolithography method, and baked. (Pitch 540 μm, width 180
Next, a dielectric layer is formed on these electrodes by screen printing and fired. (Thickness: 30 μm) On this dielectric layer, magnesium oxide, which is a sputter protection layer and has a high secondary electron emission rate, is 500 nm by EB evaporation.
The thickness is formed to form a front substrate.

Next, the back substrate prepared in Example 1 was prepared, and R, R was formed between adjacent ribs by screen printing.
After separately applying the phosphor layers of the three colors G and B, a low-melting glass paste for frit sealing is applied by a screen printing method while paying attention so that the electrode terminals can be taken out. (Drying thickness: 500 μm, width: 3 mm) Baking is performed to remove the binder from the phosphor and the glass paste. The rear substrate is aligned with and overlapped with the front substrate so that discharge cells can be formed. Further, a ring-shaped pellet of low melting point glass for frit sealing is placed outside the exhaust hole. A glass tube for exhaust is arranged on this. Thereafter, the low-melting glass is softened and melted and sealed.

The panel after the above-mentioned sealing is evacuated by an exhaust glass tube while baking. After sufficiently removing the adsorbed gas and organic substances and drawing a vacuum, Xe-10% N
The discharge gas of e was introduced at 0.05 MPa, and the glass tube was sealed. Complete the entire panel. Since the rear substrate of Example 1 was used, the ribs hardly fell down, the sealing state with the front substrate was good, and the performance of the panel was sufficient.

<Comparative Example 1> As a comparative example, a back substrate of a plasma display panel having ordinary meandering ribs without a reinforcing pattern (FIG. 1 as a top view before firing, FIG. 2 as a cross-sectional view, and a top view after firing) 3. FIG. 4) as a cross-sectional view was prepared by a photosensitive paste method. The details will be described below.

Asahi Glass PD200 was used as the glass substrate, and after annealing, a pattern was formed with a photosensitive Ag paste (TR3954) made of Taiyo Ink and baked.
(360 μm pitch, 40 μm width, 4 μm thickness) A dielectric glass paste was printed by a screen printing method and fired. (Thickness after firing: 10 μm)

After applying the photosensitive paste, exposure and development were performed using a glass mask to form meandering ribs. (Rib height 150 μm, rib top width 50 μm, discharge cell opening width 550 μm, non-discharge cell 70 μm width)

The substrate was baked to obtain the following shape. Rib highest part height 110μm, rib top part width 3
5 μm, discharge cell opening width at the rib top 470 μm, non-discharge cell 180 μm width, discharge cell opening width at the rib bottom 5
60 μm, non-discharge cell opening width 80 μm. The flatness of the rib top was good at ± 5 μm, but the inclination was as high as 25 degrees.
It could not be used for PDP panels.

[0093]

As described above in detail, according to the rib structure and the manufacturing method of the present invention, deformation of the rib shape can be prevented. In particular, in the case of a meandering rib, since the shape deformation of the rib can be reduced and the size of the discharge cell can be maximized, a panel having good luminous efficiency can be manufactured, and the quality of the plasma display panel and its rear substrate can be improved.

[Brief description of the drawings]

FIG. 1 is a top view showing the structure of a back substrate of a plasma display before firing for explaining a conventional technique.

FIG. 2 is a cross-sectional view illustrating a structure of a back substrate of a plasma display before firing for explaining a conventional technique.

FIG. 3 is a top view showing a structure of a back substrate of a plasma display after firing for explaining a conventional technique.

FIG. 4 is a cross-sectional view illustrating a structure of a back substrate of a plasma display after firing for explaining a conventional technique.

FIG. 5 is a top view showing the structure of the rear substrate of the plasma display according to the third embodiment of the present invention.

FIG. 6 is a sectional view showing a structure of a plasma display rear substrate according to a third embodiment of the present invention.

FIG. 7 is a top view showing a structure of a plasma display rear substrate according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a structure of a plasma display rear substrate according to a fourth embodiment of the present invention.

FIG. 9 is a top view showing the structure of the rear substrate of the plasma display according to the fifth embodiment of the present invention.

FIG. 10 is a sectional view showing the structure of the back substrate of the plasma display according to the fifth embodiment of the present invention.

FIG. 11 is a top view showing the structure of the rear substrate of the plasma display according to the sixth embodiment of the present invention.

FIG. 12 is a sectional view showing the structure of a plasma display rear substrate according to a sixth embodiment of the present invention.

FIG. 13 is a top view showing the structure of the rear substrate of the plasma display according to the seventh embodiment of the present invention.

FIG. 14 is a sectional view showing a structure of a plasma display rear substrate according to a seventh embodiment of the present invention.

FIG. 15 is a top view showing the structure of the rear substrate of the plasma display according to the ninth aspect of the present invention.

FIG. 16 is a sectional view showing the structure of a plasma display rear substrate according to a ninth embodiment of the present invention.

FIG. 17 is a cross-sectional view showing a structure of a plasma display panel according to claims 18 and 19 of the present invention.

Continuing on the front page (72) Inventor Isao Kato 1-5-1, Taito, Taito-ku, Tokyo Letterpress Printing Co., Ltd. (72) Inventor Junichi Arai 1-15-1, Taito, Taito-ku, Tokyo Letterpress printing stock In-house F term (reference) 5C027 AA09 5C040 FA01 GF03 GF12 GF19 MA23

Claims (19)

[Claims] 1. A back substrate of a plasma display panel, comprising a rib and a reinforcing pattern at a bottom of the rib. 2. The back substrate of the plasma display panel according to claim 1, wherein the rib is a meandering rib. 3. The back substrate of a plasma display panel according to claim 2, wherein the reinforcing pattern is formed only in a lower portion of a space having a small rib interval that hardly contributes to light emission. 4. The back substrate of the plasma display panel according to claim 2, wherein the reinforcing pattern is formed entirely except on the address electrodes. 5. The plasma display panel according to claim 2, wherein the reinforcing pattern is formed so as to connect the lower layers of the meandering ribs that maintain the maximum width of each discharge cell with a shortest straight line. Back substrate. 6. The back substrate of a plasma display panel according to claim 2, wherein the reinforcing pattern is formed so as to linearly connect the centers between the respective discharge cells with a cross. 7. The rear substrate of a plasma display panel according to claim 2, wherein the reinforcing pattern is formed on both sides of a rib lower layer adjacent to the discharge cell. 8. A back substrate of a plasma display panel, wherein a notch pattern is formed at a top of a rib. 9. The back substrate of claim 8, wherein the rib is a meandering rib. 10. A method for manufacturing a rear substrate of a plasma display panel according to claim 1, wherein an address electrode and a dielectric are formed on the substrate, and the reinforcing pattern is formed thereon. A method of manufacturing a rear substrate of a plasma display panel, wherein a rib is formed after the rib is formed in advance. 11. A method of manufacturing a back substrate of a plasma display panel according to claim 1, wherein said reinforcing pattern is formed after forming an address electrode, a dielectric, and a rib on said substrate. A method for manufacturing a back substrate of a plasma display panel, characterized by comprising: 12. A method for manufacturing a rear substrate of a plasma display panel according to claim 8, wherein an address electrode and a dielectric are formed on the substrate, and a rib is formed thereon. A method of manufacturing a rear substrate of a plasma display panel, wherein the top notch pattern is formed later. 13. A method for manufacturing a rear substrate of a plasma display panel according to claim 1, wherein an address electrode and a dielectric are formed on the substrate, and the reinforcing pattern or the dielectric is formed thereon. A method of manufacturing a rear substrate of a plasma display panel, wherein a rib is formed simultaneously with the top notch pattern. 14. A method of manufacturing a rear substrate of a plasma display panel according to claim 13, wherein an intaglio transfer method is used as a method of forming a rib simultaneously with the reinforcing pattern or the top notch pattern. A method for manufacturing a rear substrate of a plasma display panel. 15. A method for manufacturing a rear substrate of a plasma display panel according to claim 1, wherein after forming an address electrode on the substrate, a dielectric and a lower layer of the reinforcing pattern or the lower electrode are formed. A method of manufacturing a rear substrate of a plasma display panel, wherein a rib is formed simultaneously with a top notch pattern. 16. A method of manufacturing a rear substrate of a plasma display panel according to claim 15, wherein an intaglio transfer method is used as a method of forming a rib simultaneously with a dielectric and said reinforcing pattern or said top notch pattern. A method for manufacturing a back substrate of a plasma display panel, characterized by comprising: 17. A method for manufacturing a back substrate of a plasma display panel according to claim 1, wherein after forming an address electrode on the substrate, a dielectric and said reinforcing pattern are simultaneously formed. A method of manufacturing a rear substrate of a plasma display panel, wherein a rib is formed later. 18. A plasma display panel according to claim 1, wherein a back substrate and a front substrate of the plasma display panel are bonded together. 19. A method of manufacturing a back substrate of a plasma display panel according to claim 10, wherein the back substrate is manufactured by bonding the back substrate and the front substrate. A method for manufacturing a plasma display panel.