JP3407534B2 - Barrier rib forming method for gas discharge panel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge panel (Pla-sma Di
splay Panel Hereinafter, it is abbreviated as PDP. In particular, the present invention relates to a method of forming barrier ribs (hereinafter referred to as barrier ribs) for preventing crosstalk between discharge parts.

With the development of colorization in recent years, PDPs have come into the spotlight as large-scale full-color flat panel displays capable of displaying on television, and high resolution is required.

Further, in each discharge space of the PDP, barrier ribs must be formed on the substrate with high precision in order to prevent so-called crosstalk such as adjacent discharge cells and partitions of light emitting elements of the three primary colors of color. On the other hand, there is a demand for low cost and efficient manufacturing methods.

[0004]

2. Description of the Related Art Conventionally, barrier ribs for preventing crosstalk are formed by a screen printing method in which a glass paste is directly applied to a predetermined area on a substrate, or in recent years, a sandblast method. Hereinafter, an example of a conventional barrier rib forming method will be described with reference to the manufacturing steps. In addition, in order to make the description of the configuration and the operation easy to understand, the same reference numerals are given to the same portions throughout the drawings, and the duplicate description thereof will be omitted.

FIG. 3 is a diagram showing a conventional barrier rib forming process. In FIG. 3, reference numeral 1 denotes a glass substrate on which a discharge space of a panel is formed and electrodes, barrier ribs, phosphors, etc. are formed, 2 is an address electrode for addressing a discharge point,
Is a photosensitive resist laminated or applied on the glass substrate 1 with a uniform thickness (corresponding to the height of the barrier rib), 4 is a pattern mask for patterning the photosensitive resist 3 into a barrier rib pattern (for example, a strip),
Reference numeral 5 is a black glass paste that becomes a barrier rib, and 6 is a band-shaped barrier rib in plan view.

Next, the formation of barrier ribs will be described in the order of steps.
First, in FIG. 3A, the photosensitive resist 3 having the address electrodes 2 formed in advance is laminated or applied with a thickness corresponding to the height of the barrier ribs. Next in FIG.
As shown in (b), a pattern mask 4 having a pattern corresponding to the barrier ribs is provided on the photosensitive resist 3, and exposure is performed based on the pattern mask 4. In addition,
The shape of the barrier rib is a strip shape extending in parallel with the address electrode 2.

Next, as shown in FIG. 3 (c), the photosensitive resist 3 is left only on the portions required for barrier rib formation by development, that is, a band-shaped recess (groove) pattern is formed on the glass substrate 1. It is formed.

Next, as shown in FIG. 3D, the black glass paste 5 for forming the barrier ribs is embedded in the concave portion of the photosensitive resist 3, and the black glass paste 5 is cured by drying and calcination. Let Further, the surface is polished in order to remove the cured glass adhered to other than the recessed portion,
Excess glass paste 5 on the surface of the photosensitive resist 3 is removed as shown in FIG.

After cleaning the glass substrate 1, the glass substrate 1 is baked to burn and erase the photosensitive resist 3 as shown in FIG.
Is fired. After that, by cleaning the glass substrate 1,
Strip-shaped barrier ribs 6 parallel to the address electrodes 2 are formed on the glass substrate 1.

[0010]

The resolution of PDP depends on the number of discharge cells. Therefore, in order to improve the resolution, the thickness (width) of the barrier rib that fills the discharge area
Needs to be formed thin. However, in the conventional example shown in FIG. 3, the thickness of the barrier rib is 1 mm due to the fine pattern of the concave pattern formed on the photosensitive resist 3 and the glass paste 5 filled in the female mold obtained by exposing and developing the concave pattern. The limit was the formation of five barrier ribs.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a method of forming a barrier rib which can form a thin barrier rib without impairing the height of the barrier rib.

[0012]

In order to achieve the above object, as shown in FIG. 1, a plurality of electrodes and a plurality of strips are formed on a substrate.
A gas discharge panel having a barrier rib
A strip-shaped barrier rib is formed in parallel between the electrodes.
The electrodes on the substrate including the array of the plurality of electrodes.
Forming a pattern sensitive <br/> optical resist layer serving as a recess with respect to every other electrode of the array, the glass layer on the lateral walls of the recess is filled with a glass paste by printing to the each recess A step of forming the strip-shaped barrier ribs made of
It is achieved by barrier ribs forming method of discharge panel and a step of removing the photosensitive resist layer.

In the printing in this case, the glass paste 5 can be adhered only to the side wall of the recess 11 by setting the number of times of printing the glass paste 5 to be small (for example, twice). Further, by setting the viscosity of the glass paste to about 200P to 300P, the glass paste 5 can be attached only to the side wall of the recess 11.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below. 1A to 1D are views showing a method of forming a barrier rib according to a first embodiment of the present invention in the order of manufacturing steps. That is, FIG.
1A shows a photosensitive resist forming step, FIG. 1B shows a glass paste printing step, and FIG. 1C shows a barrier rib baking step.

First, in the step of FIG. 1A, as shown in FIGS. 3B and 3C of the conventional example, a photosensitive resist layer having a recess 11 is formed on a glass substrate. In this case, the point different from the conventional example is that the address electrodes 2 are formed at equal intervals directly below the photosensitive resist layer and in the recesses between the resists. That is, it means that they are arranged at a pitch twice that of the conventional example.

[0016] In step of FIG. 1 (b), than is to fill the glass paste 5 in the recess _{11, PbO-B 2 O 3} -SiO 2 based glass (60 containing PbO about 70 wt% as a glass paste 70 wt%), an inorganic pigment containing ceramic filler (5-10 wt%) as an additive and about 50 wt% of Cr ₂ O ₃ (5
〜10wt%), terpineol BCA main component (15-25wt%) as organic solvent, and cellulosic resin (1
~ 2wt%) mixed with a binder
Use a glass paste of about 1000P (substantially the same as the conventional glass paste).

The glass paste 5 mixed with the above components is filled in the concave portion 11 by the screen printing method as in the conventional case, but the number of times of printing is reduced so that the paste does not completely fill the concave portion. Specifically, it is preferable to use twice when using a 350 mesh screen.

The shapes of the recesses embedded after drying the glass paste in the cases of two times, three times, four to seven times, and eight to ten times are typically shown in one of the recesses 11 in FIG. 1 (b). As is clear from this figure, in the case of the double printing, the glass paste 5 adhered only to the range of the shaded portion indicated by reference numeral 13, that is, only the side surface of the concave portion, and the shape of the ideal barrier rib was obtained. However, in the case of printing three times, as shown by reference numeral 14, the glass substrate 1
The glass paste is relatively thickly adhered to the surface of the barrier rib, that is, the base of the barrier rib becomes like a skirt, and a predetermined discharge space (discharge cell) cannot be defined.

In the case of printing 4 to 7 times and 8 to 10 times, the tendency further progressed, and at the end, the glass paste 5 almost completely filled the concave portion. The glass paste 5 applied to all the side walls of the recess 11 in this way is dried and pre-baked to be hardened, and then the glass paste 5 attached to the extra surface portion is removed by polishing.
% Solution to remove the photosensitive resist 3 by immersing and washing the glass paste 5 near the glass melting temperature to form the barrier ribs 12 shown in FIG. 1 (c) on the glass substrate 1. .

The measured dimensions of the barrier ribs 12 obtained as a result are that the distance between the center lines of the barrier ribs 12 is 130 μm and the height thereof is 10 μm.
It was 5 μm and the thickness (width) of the barrier rib 12 was 20 μm. According to this method, the high-precision barrier rib 12 having a small thickness can be obtained with a density twice as high as that of the conventional example (in contrast to one barrier rib being formed in the recess in the conventional example, in the case of the present example, 2)
Can be formed individually. That is, there is an effect that one discharge cell space can be formed in the recess.

FIG. 2 is an enlarged sectional view of the essential part of the barrier rib forming step of the second embodiment of the present invention. In this example, α-terpineol naturally existing in the field of alcohol was added to the glass paste 5 as an organic solvent, and a high-viscosity glass paste was used. That is, a glass paste having a viscosity of 200P to 300P is prepared, and this is subjected to a screen printing method.
The recess 11 was coated once.

As a result, as shown in the figure, the glass paste having a viscosity of 200 P or less was thickly formed on the side surfaces of the concave portion including the surface of the glass substrate when the glass paste was applied once.
It was confirmed that the glass paste 5 can be applied (slightly applied to the surface of the substrate) only to all the sidewalls of the recess 11 by one-time application of the glass paste of 200P to 300P. That is, there is an effect that the barrier rib 12 having a small thickness can be obtained with twice the density of the conventional example even by adjusting the viscosity.

As described above, by controlling the number of times the glass paste is printed or by controlling the viscosity and applying the glass paste only to the side walls of the recesses, it is possible to form high-definition barrier ribs. The gas discharge panel including the barrier ribs obtained by the method can significantly improve the resolution. The barrier rib may have a mesh shape.

[0024]

As described above, according to the method of forming a barrier rib for a gas discharge panel of the present invention, a high-definition barrier rib can be formed efficiently and at low cost, and a gas discharge panel using this barrier rib has a remarkably high resolution. Since it can be increased, it greatly contributes to the improvement of image quality.

[Brief description of drawings]

FIG. 1 is a diagram showing a method of forming a barrier rib according to a first embodiment of the present invention in the order of manufacturing steps.

FIG. 2 is an enlarged sectional view of an essential part of a barrier rib forming step according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a conventional barrier rib forming process.

[Explanation of symbols]

1 glass substrate 3 Photosensitive resist 5 glass paste 6,12 Barrier rib 11 recess

Continuation of front page (56) Reference JP-A-3-184231 (JP, A) JP-A-3-179630 (JP, A) JP-A-2-155142 (JP, A) JP-A-3-57138 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 9/02 H01J 11/02

Claims (2)

(57) [Claims] 1. A plurality of electrodes and a plurality of strip-shaped barriers on a substrate.
In a gas discharge panel having a rib, the strip-shaped bar
When forming the rear ribs in parallel between the electrodes,
One of the electrode arrays on a substrate containing an array of electrodes
Forming a photosensitive resist layer pattern as a recess with respect to the electrodes of the favorite, the glass layer on the lateral walls of the recess is filled with a glass paste by printing to the each recess Tona
Process and barrier rib formation method for a gas discharge panel, characterized by comprising a step of removing the photosensitive resist layer to form the strip-shaped barrier ribs that. 2. The method of forming a barrier rib of a gas discharge panel according to claim 1, wherein the glass paste has a viscosity of 200P to 300P.