JP2001043803A - Plasma display panel, forming method therefor and barrier rib material used as blast mask to be used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel having a base layer of a bright color and a top layer of a dark color in a barrier rib. SOLUTION: In this plasma display panel, a top layer of the barrier ribs 8 is constituted of blast remaining layers of a barrier rib material used as a blast mask provided by being printed in a stripe pattern in the plasma display panel constituted by arraying the barrier rib 8 constituted of base layers 8b of bright colors and top layers 8t of dark colors. Thickness of the top layers 8t can be made 1 to 5 μm. This plasma display panel is formed by a process for providing a barrier rib forming layer on a substrate 11 and by forming a barrier rib shape by performing blast working after the barrier rib material used as the blast mask in dispersed with colored pigment on the barrier rib forming layer is coated in a pattern shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plasma display panel (PDP) and a method for forming the same. Specifically, in forming a barrier rib that is a part of the PDP back plate constituent layer, a blast mask in which a coloring pigment is dispersed is used, and the blast mask is left even after blasting, so that the top of the barrier rib has a different color from the base. 2
The present invention relates to a plasma display panel including a color barrier rib, a method of forming the same, and a barrier rib material.

[0002]

2. Description of the Related Art In general, a PDP is provided with a pair of electrodes regularly arranged on two opposing glass substrates (a front plate and a back plate), between which a gas mainly composed of Ne, Xe, He or the like is supplied. It has a sealed structure. Then, a voltage is applied between the electrodes to generate a discharge in the minute cells around the electrodes, so that each cell emits light and display is performed.

FIG. 3 is an exploded perspective view showing an example of the configuration of an AC type PDP. In this figure, a front plate made of a glass substrate 12 and a back plate made of a glass substrate 11 are shown separated from the front plate.
Numerals 1 and 12 are arranged in parallel and opposed to each other, and both are held at a fixed interval by a barrier rib 8 provided on a glass substrate serving as a back plate.
On the rear side of the glass substrate 12 serving as a front plate, composite electrodes X and Y each composed of a sustain electrode 14 which is a transparent electrode and a bus electrode 13 which is a metal electrode are formed in parallel with each other, and a dielectric A layer 16 is formed, and a protective film 19 (MgO layer) is further formed thereon. On the front side of the back plate, address electrodes 15 are formed between the barrier ribs 8 in parallel with each other, and the phosphor layer 1 is formed so as to cover the wall surfaces of the barrier ribs 8 and the cell bottom surface.
8 are provided.

The barrier ribs 8 are often made black to obtain the contrast of the PDP. However, in order to further improve the brightness, the color of the barrier ribs is made white, and light emitted from the phosphor screen is directed toward the barrier ribs. There is a method of reflecting light with barrier ribs. In addition, the top of the barrier ribs is blackened to improve contrast and brightness, and the other portions are white, and the transmittance near the tops is high in order to improve the brightness by preventing absorption of light emitted near the tops of the barrier ribs into the barrier ribs and improving brightness. There is also a method of forming a barrier rib.

As a method of forming the barrier rib 8, there are a screen printing method, a sand blast method, a so-called embedding method using a dry film resist, and a method of pressing a molding die having a specific shape to form the shape. Among these, the method of forming by the sand blast method is becoming mainstream. In this method, a glass paste serving as a barrier rib is coated on a glass substrate serving as a back plate with a predetermined pattern by a coating method such as screen printing or die coating on a substrate provided with an address electrode 15 or a dielectric layer 17 in a predetermined pattern. It is applied in a thickness, dried, laminated with a photosensitive dry film resist, irradiated with light through a photomask on which a specific pattern is formed, and developed to form the dry film resist into a specific pattern shape.

Generally, in an AC-driven PDP, the pattern shape is composed of lines / spaces having a certain line width and a certain pitch. After the dry film resist pattern is formed, if sand blasting is performed, the portion where the dry film resist is present acts as a blast mask, so that the paste remains and becomes a barrier rib, and the portion where the dry film resist is removed by development leaves the paste. Instead, a cell on which a phosphor screen is formed. Thereafter, the dry film resist is peeled off and baked to form a barrier rib structure.

In forming this barrier rib shape, if the barrier rib is formed of a single color such as one color of black or one color of white, it can be formed by one application in any of the methods, and the process is simple. However, as described above, in the case where the top and other parts are black in order to obtain contrast and the barrier rib base is white in order to further improve luminance, the conventional method does not require a single step. The process becomes complicated.

[0008]

In the case of a barrier rib in which the top layer is black and the base layer and other parts are white in order to improve both the brightness and the contrast, two coatings and patterning are required, which is advantageous. Nevertheless, due to the complexity of the process, the formation of ribs in a single color consisting only of black or white has become mainstream. The present invention has been made by researching to form such a two-color barrier rib by a simple process.

[0009]

A first aspect of the present invention for solving the above-mentioned problems is a plasma display panel in which barrier ribs in which a base layer of a barrier rib is light and a top layer is dark are arranged. The plasma display panel is characterized in that a top layer of the barrier rib is formed of a blast mask and a blast remaining layer of barrier rib material provided by printing in a stripe pattern. With such a plasma display panel, the top layer can be made thin, and the effect of improving brightness can be enhanced.

In a second aspect of the present invention for solving the above-mentioned problems, in a method of forming a back plate of a plasma display panel by a blast method, a step of providing a barrier rib forming layer on a substrate; A method for forming a plasma display panel, comprising: applying a blast mask / barrier rib material in which a coloring pigment is dispersed, in a barrier rib pattern, and then performing blast processing to form a barrier rib shape.
With this method of forming a plasma display panel, a plasma display panel with improved contrast and brightness can be manufactured by simple steps.

A third aspect of the present invention for solving the above-mentioned problems is a coating material used in the above-described method for forming a plasma display panel, which functions as a blast mask in a blast step, and after the panel is completed. A blast mask / barrier rib material, which functions as a dark top layer by a coloring pigment. Since the barrier rib material is used, it can be effectively used for manufacturing a plasma display panel with improved contrast and brightness.

[0012]

DETAILED DESCRIPTION OF THE INVENTION In order to achieve the above object, the present invention firstly forms a monolayer barrier rib forming material on a whole surface of a substrate in a predetermined thickness, and then disperses a color pigment in the blast mask. A blast mask is formed by printing the barrier rib material in a barrier rib pattern by a screen printing method or the like. Thereafter, sandblasting is performed to form a barrier rib shape, and firing is performed in a state where the mask is left as a remaining layer to form a two-color barrier rib.

An embodiment of the present invention will be described below with reference to the drawings. Each drawing schematically shows the size, shape, and positional relationship of each constituent layer so that the present invention can be understood. In the following description, specific materials and conditions may be used, but these materials, conditions, and the like are merely examples, and the present invention is not limited thereto.

FIG. 1 is a perspective view showing a plasma display panel according to the present invention. FIG. 4 is a perspective view including a partial cross section of a back plate of the PDP, and a front plate appears as in FIG. 3. FIG.
As shown in FIG.
Except for the barrier ribs, the configuration is the same as that of a normal plasma display panel. A feature of the plasma display panel of the present invention is that the barrier ribs are formed of a white or light base layer 8b and a black or dark top layer 8t. The reason why the top layer 8t is darkened is to suppress reflection of incident light from the outside.
The purpose of making the base layer 8b lighter is to reflect light traveling toward the barrier ribs by the light emission from the phosphor layer with the barrier ribs, and such an effect itself is generally known. is there. The present invention is characterized in that a blast mask used as a blast mask is used as a blast mask on the top layer of the barrier rib, and a remaining layer remaining after blasting of the barrier rib layer is used. The thickness of the top layer 8t is 1 μm
Although it is sufficient if there is, a blast mask formed with a thickness of 10 to 20 μm usually remains as a residual layer having a thickness of several μm after firing.

FIG. 2 is a sectional view showing a step of forming a barrier rib. First, a screen printing method, a photolithography method, a filling method, a sand blasting method using an electrode forming paste obtained by dispersing a metal such as Ag, Ni, Cu or the like and an alloy thereof in a low melting glass frit and a binder resin which can be fired at a low temperature. Electrodes 15 are formed on the glass substrate 11 for PDP by a method such as a die coating method or the like (FIG. 2A). Next, the dielectric layer 1 is formed on the address electrode 15.
The dielectric layer material is formed to have a uniform thickness by a screen printing method, a die coating method, or the like to form 7 (FIG. 2).
(B)). The dielectric layer is preferably formed for stability at the time of driving and for preventing damage to the barrier ribs formed by sandblasting so that the electrodes are not exposed. Although the dielectric layer material will be described later in detail, a low-melting glass containing lead oxide glass or bismuth oxide as a main component is preferably used.

Next, a barrier rib forming layer 8p is provided by applying a barrier rib forming material to a uniform thickness by a screen printing method, a blade coating method, a die coating method or the like, and drying (FIG. 2C). Although a barrier rib forming material will be described in detail later, a mixture containing a low melting point glass powder, a refractory filler, a binder resin, and a solvent is used. On the barrier rib forming layer 8p, a blast mask and a barrier rib material in which a coloring pigment is dispersed are printed in a pattern by a screen printing method or the like, and dried to form a blast mask 8m (FIG. 2D).

Using the blast mask 8m thus formed as a cutting mask, the barrier rib forming layer 8p is cut by a sand blast method. Thereby, the blast mask 8
The portion without m is cut into a concave portion, and the portion with the blast mask 8m remains as the barrier rib 8 without being cut. In this blast process, the blast mask 8m
However, if the thickness of the remaining blast mask is 1 μm to several μm, a sufficient effect can be exhibited for preventing reflection of external light. Since the blast mask / barrier rib material is much more sand blast resistant than the normal barrier rib material, the initial coating thickness is 1
Even if the thickness is about 0 to 20 μm, a film thickness of several μm can be left. After blasting, wash with water and dry. Finally, the panel member is fired in a firing furnace to obtain a panel structure as shown in FIG. After that, the phosphor layer 18 is formed by a usual process and baked.

Hereinafter, each material used in the present invention will be described in detail. <Dielectric Layer Material and Barrier Rib Forming Material> The dielectric layer material and barrier rib forming material include at least an inorganic component having a glass frit and a thermoplastic resin. As glass frit, its softening point is 350 ° C ~ 650 °
C, the coefficient of thermal expansion α ₃₀₀ is 60 × 10 ⁻⁷ / ° C. to 100
× 10 ^-7 / ° C. If the softening point of the glass frit exceeds 650 ° C., it is necessary to raise the firing temperature, and it is not preferable because the laminating object is thermally deformed. Before this, the glass frit is fused, and voids and the like are generated in the layer, which is not preferable. If the coefficient of thermal expansion is out of the range of 60 × 10 ⁻⁷ / ° C. to 100 × 10 ⁻⁷ / ° C., the difference from the coefficient of thermal expansion of the glass substrate is large, which is not preferable because distortion occurs.

In addition to the glass frit, two or more kinds of inorganic components and inorganic pigments may be used in combination as the inorganic component. The inorganic powder is used as an aggregate, and is added as needed. The inorganic powder is intended to prevent casting at the time of firing and improve the denseness, and has a softening point higher than that of the glass frit. For example, aluminum oxide, boron oxide, silica, titanium oxide,
Various inorganic powders such as magnesium oxide, calcium oxide, strontium oxide, barium oxide, and calcium carbonate can be used, and examples thereof include those having an average particle size of 0.1 μm to 20 μm. The usage ratio of the inorganic powder is preferably 0 to 30 parts by weight of the inorganic powder with respect to 100 parts by weight of the glass frit.

Inorganic pigments are added as needed to improve the luminance of the phosphor, and fire-resistant white pigments include titanium oxide, aluminum oxide, silica, calcium carbonate and the like. Can be

The resin component removed by firing in the dielectric layer material and the barrier rib forming material is a thermoplastic resin, which is contained as a binder of an inorganic component. For example, methyl acrylate, methyl methacrylate, ethyl acrylate, Ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, n-butyl acrylate, n-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate,
tert-butyl methacrylate, n-pentyl acrylate, n-pentyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-octyl acrylate, n-octyl methacrylate, n-decyl acrylate, n-decyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, styrene, α
1 such as methylstyrene, N-vinyl-2-pyrrolidone, etc.
Examples thereof include polymers or copolymers composed of at least two or more species, and cellulose derivatives such as ethyl cellulose.

Particularly, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, n-butyl methacrylate, n-butyl methacrylate
Butyl acrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate,
A polymer or copolymer comprising at least one kind of tert-butyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate and the like, and at least one kind of α-methylstyrene, N-vinyl-2-pyrrolidone and the like is preferable. .

The ratio of the inorganic component to the resin component is 3 to 50 parts by weight, preferably 5 to 30 parts by weight, based on 100 parts by weight of the inorganic component.
A plasticizer, a dispersant, an antisettling agent, an antifoaming agent, a leveling agent, and the like are added to the dielectric layer material and the barrier rib forming material as necessary.

The plasticizer is added for the purpose of improving the fluidity of the ink. For example, dimethyl phthalate,
Normal alkyl phthalates such as dibutyl phthalate and di-n-octyl phthalate, phthalic acid esters such as di-2-ethylhexyl phthalate, diisodecyl phthalate, butyl benzyl phthalate, diisononyl phthalate, ethyl phthalethyl glycolate and butyl phthalyl butyl glycolate , Tri-2-ethylhexyl trimellitate, tri-n-alkyl trimellitate,
Triisononyl trimellitate, trimellitate esters such as triisodecyl trimellitate, dimethyl adipate, dibutyl adipate, di-2-ethylhexyl adipate, diisodecyl adipate, dibutyl diglycol adipate, di-2-ethylhexyl acetate,
Dimethyl sebacate, dibutyl sebacate, di-2-ethylhexyl sebacate, di-2-ethylhexyl malate, acetyl-tri- (2-ethylhexyl) citrate, acetyl-tri-n-butyl citrate, acetyl tributyl citrate and the like Aliphatic dibasic acid esters, glycol derivatives such as polyethylene glycol benzoate, triethylene glycol di- (2-ethylhexoate) and polyglycol ether; glycerin derivatives such as glycerol triacetate and glycerol diacetyl monolaurate; sebacine Acid, adipic acid,
Polyester based on azelaic acid, phthalic acid, etc.
Low molecular weight polyether having a molecular weight of 300 to 3,000, low molecular weight poly-α-styrene, low molecular weight polystyrene, trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri-2-ethylhexyl phosphate, tributoxyethyl phosphate, triphenyl phosphate , Tricresyl phosphate,
Orthophosphoric acid esters such as trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate and 2-ethylhexyl diphenyl phosphate; ricinoleic acid esters such as methyl acetyl ricinolate; poly-1,3-butanediol adipate; Examples include polyester epoxidized esters such as epoxidized soybean oil, and esters such as glycerin triacetate and 2-ethylhexyl acetate.

The dispersant and the anti-settling agent are intended to improve the dispersibility of the inorganic component and the anti-settling property, and examples thereof include a phosphate ester type, a silicone type, a castor oil ester type and various surfactants. Examples of the defoaming agent include, for example, silicone-based, acrylic-based, various surfactants, and the like. Examples of the leveling agent include, for example, fluorine-based, silicone-based, various surfactants, and the like. Is done.

The above-mentioned dielectric layer material and barrier rib forming material include anones such as methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, toluene, xylene, cyclohexanone, methylene chloride, 3-methoxybutyl acetate, and ethylene glycol monoalkyl ethers. , Ethylene glycol alkyl ether acetates, diethylene glycol monoalkyl ethers, diethylene glycol monoalkyl ether acetates, propylene glycol monoalkyl ethers, propylene glycol monoalkyl ether acetates, dipropylene glycol monoalkyl ethers, dipropylene glycol monoalkyl ether Acetates, dissolved in terpenes such as α- or β-terpionaire, or It is dispersed and applied on a glass substrate by screen printing, die coating, blade coating, comma coating, roll coating, gravure reverse coating, gravure direct method, slit reverse coating method, or the like, and dried to a predetermined film thickness.

<Electrode-Forming Paste> An electrode-forming paste suitable for forming an electrode comprises at least an inorganic component composed of glass frit, a thermoplastic resin, a conductive powder, and, if necessary, a thickener. As the inorganic component, the glass frit, the inorganic powder, and the inorganic pigment described as the inorganic component in the dielectric layer material and the barrier rib forming material described above can be used, and the glass frit has an average particle diameter of 0.3 μm to 10 μm, Preferably 0.5 μm to 5 μm
m, and the inorganic powder is preferably 0 to 100 parts by weight based on 100 parts by weight of the glass frit.

The resin component is added as a binder of an inorganic component, and like the thermoplastic resin in the dielectric layer material or the barrier rib forming material,
It is a substance which is volatilized and decomposed during firing so that no carbide is left in the pattern, and those described in the above-mentioned dielectric layer material and barrier rib forming material can be used. Particularly, cellulose resins such as ethyl cellulose, methyl cellulose, nitrocellulose, cellulose acetate, cellulose propionate, cellulose butyrate, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, isopropyl acrylate, 2-ethylhexyl acrylate, 2-ethylhexyl acrylate, Polyacrylic acid esters or polymethacrylic acid esters which are polymers or copolymers of hydroxyethyl acrylate or methacrylates thereof, poly-α-
Styrene, polyvinyl alcohol and polybutene-based resins are preferred, and polybutene-based resins are particularly preferred. The content of the resin component in the electrode forming paste is 3 to 50% by weight,
Preferably it is 5 to 30% by weight.

Examples of the conductive powder include metal powders such as gold, silver, copper, nickel, and aluminum. Spherical metal powders having an average particle diameter of 0.1 μm to 5 μm are preferred. The ratio of the conductive powder and the glass frit used is as follows.
The glass frit is 2 to 20 parts by weight with respect to 0 parts by weight.

The thickener is added as needed for the purpose of increasing the viscosity of the electrode forming paste and suppressing the penetration into the lower layer. Known thickeners can be used. For example, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, sodium alginate, casein, sodium caseinate, xanthan gum, polyvinyl alcohol, modified polyether urethane, polyacrylate, polymethacrylate, montmotalone, aluminum stearate, zinc stearate , Aluminum octylate, castor oil with water, castor oil ester, fatty acid amide, polyethylene oxide, dextrin fatty acid ester, dibenzylidene sorbitol, vegetable oil-based polymerized oil, surface-treated calcium carbonate, organic bentona DOO, silica, titania, zirconia, fine powder such as alumina and the like. The content of the thickener is 0.1 to 20 parts by weight, preferably 0.1 to 10 parts by weight, and preferably less than 0.1 part by weight, based on 100 parts by weight of the conductive powder. There is no thickening effect
If the amount is more than 0 parts by weight, an adverse effect such as disconnection is caused on the characteristics of the electrode.

In order to improve the applicability of the paste for forming an electrode, a plasticizer, a dispersant, an anti-settling agent,
An antifoaming agent, a release agent, and a leveling agent may be added.All of them are mixed with a solvent in the same manner as described above for the dielectric layer material and the barrier rib forming material, and kneaded by a roll mill to form a paste-like coating. Into a liquid or kneaded by a ball mill or the like to form a slurry-like coating liquid. The electrode forming paste has a dynamic viscosity of 500-500.
7000 poise, and the loss tangent tan δ is in the range of 5 to 12. When the dynamic viscosity exceeds 7000 poise, transfer from an intaglio becomes difficult, which is not preferable. Also,
If the loss tangent tan δ exceeds 12, the pattern formed by transfer is undesirably sagged. The dynamic viscosity and the loss tangent tan δ are measured with a Calimed CS rheometer at a temperature of 23 ° C., a frequency of 10 Hz and a strain of 3%.

The curable resin is one which is decomposed / removed upon firing after curing, and may be a known ionizing radiation curable resin or a thermosetting resin.
As the ionizing radiation curable resin, an ultraviolet ray or electron beam curable resin can be used, and a prepolymer, oligomer and / or a polymer having a polymerizable unsaturated bond or an epoxy group in a molecule can be used.
Alternatively, a composition in which monomers are appropriately mixed can be used. As the prepolymer and oligomer, unsaturated polyesters such as a condensate of an unsaturated dicarboxylic acid and a polyhydric alcohol, epoxy resins, polyester methacrylate, polyether methacrylate, methacrylates such as polyol methacrylate, polyester acrylate, polyether acrylate, Acrylates such as polyol acrylate are exemplified.

<Blast mask / barrier rib material> The coloring pigment contained in the blast mask / barrier rib material used in the present invention is finally baked at a temperature higher than the softening point of the glass frit. Must be stable in the firing step. Materials that can be used as the coloring pigment include complex oxide pigments (Cr, Co, Ni, Fe, Mn, Cu, Sb, As,
Pigments comprising two or more metal oxides such as Bi, Ti, Cd, Al, Ca, Si, Mg, and Ba), titanium oxide,
Alumina, zirconia, silica, magnesia, lead titanate, potassium titanate, cadmium sulfide selenide, red iron oxide (Fe ₂ O ₃ ), cuprous oxide, cadmium mercury red (CdS
+ HgS), chrome vermillion, silver vermilion, antimony red iodine red, zinc iron red, molybdenum red, lead red, cadmium red, chrome green, zinc green, cobalt green, chromium oxide, viridian, emerald green, ultramarine, navy blue, cobalt Blue, cerulean blue, copper sulfide, titanium yellow, titanium black, black iron oxide (Fe ₃ O ₄ ), yellow iron oxide, cadmium yellow, and graphite, and the like may be appropriately selected depending on the purpose.

The coloring pigment contained in the blast mask / barrier rib material used in the present invention can also be used as an aggregate, depending on the selection of the material. May take a while,
In that case, an aggregate is contained in the blast mask / barrier rib material. As the aggregate, for example, alumina, silica, zirconia (ZrO ₂ ), titanium oxide, magnesia, zircon (ZrSiO ₄ ), mullite (aluminosilicate mineral), cordierite (magnesium, iron aluminosilicate mineral), carbonized Barrier ribs such as silicon, barium titanate, and barium zirconate that can be stably present at a temperature equal to or lower than the firing temperature of the barrier ribs can be used.

In the blast mask / barrier rib material used in the present invention, it is necessary to fix the coloring pigment on the top of the barrier rib. A glass frit can be used for fixing the coloring pigment, and this glass frit is
Since it is fired simultaneously with the barrier ribs of the base layer, it is preferable to keep the softening point at about the same temperature.

The inorganic composition in the blast mask / barrier rib material described above has a glass frit of 40%.
-95%, preferably 60-90%, and the color pigment is 1-6.
It is appropriate to configure 0% and the aggregate in the range of 0-30%. The blast mask / barrier rib material containing these is mixed with an organic vehicle, kneaded and dispersed by a three-roll mill, a bead mill, or the like to form a paste-like coating composition. The ratio of the inorganic component (color pigment, glass frit, etc.) to the organic vehicle (binder) in the blast mask / barrier rib material is 100 inorganic components.
The binder is 50 to 1000 parts by weight based on parts by weight,
Preferably it is 100 to 700 parts by weight. There is a feature that the ratio of the organic vehicle in the material is higher than the resin component in the barrier rib forming material. However, if the amount of the binder is smaller than this, the blast mask does not function, so that an appropriate barrier rib shape cannot be formed.

Examples of the resin for the organic vehicle include cellulose derivatives such as ethylcellulose, hydroxypropylcellulose, methylcellulose and nitrocellulose, polyester resins such as polyacrylester and alkyd resin, acrylic acid, methacrylic acid, itaconic acid and maleic acid. Fumaric acid, crotonic acid, vinyl acetic acid, methyl methacrylate, methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl methacrylate,
Propyl acrylate, n-butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, 2-ethylhexyl acrylate, lauryl methacrylate, lauryl acrylate, stearyl methacrylate, stearyl acrylate, dodecyl methacrylate, dodecyl acrylate, hexyl methacrylate, hexyl acrylate, octyl methacrylate, octyl acrylate , Cetyl methacrylate, cetyl acrylate, nonyl methacrylate, nonyl acrylate, decyl methacrylate, decyl acrylate, cyclohexyl methacrylate, cyclohexyl acrylate, glycidyl methacrylate, dimethylaminoethyl methacrylate, 2-methoxy acrylate,
2 (2-ethoxyethoxy) ethyl acrylate, 2-
Hydroxyethyl methacrylate, diacetone acrylamide, N, N-dimethylaminopropyl acrylamide, N, N-diethylacrylamide, isopropylacrylamide, diethylaminoethyl methacrylate, t-butyl methacrylate, N, N-dimethylacrylamide, α-methylstyrene, styrene, Homopolymers composed of monomers such as vinyltoluene and N-vinyl-2-pyrrolidone and 2 selected from the above monomers
Copolymers composed of at least one kind of monomer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, polyolefin resin such as ethylene-vinyl acetate copolymer,
Examples include polyvinyl formal and polyvinyl butyral.

Examples of the organic solvent include anones such as methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, toluene, xylene and cyclohexanone, methylene chloride, 3-methoxybutyl acetate, ethylene glycol monoalkyl ethers and ethylene glycol dialkyl ethers. And diethylene glycol monoalkyl ethers, diethylene glycol monoalkyl ether acetates, and terpenes such as α- or β-terpineol. These may be used alone or in combination of two or more. Further, a plasticizer, an antisettling agent, a dispersant, and the like can be appropriately used as needed.

[0039]

(Embodiment) The formation process of the base layer of the barrier rib, that is, the treatment process of the substrate before the application of the blast mask and the barrier rib material is as follows. Although specific materials and conditions are used in the following description,
These materials, conditions, and the like are merely examples of the present invention, and the present invention is not limited thereto. In addition, reference numerals in the description correspond to FIGS. 1, 2, and 3. <Formation of Electrode> An address electrode 15 was formed on a glass substrate 11 using an electrode paste material composed of silver and a low-melting glass frit, and then dried and fired. <Dielectric Layer Formation> A dielectric layer material (“PX-AC1” manufactured by Nippon Electric Glass Co., Ltd.) containing glass frit as a main component is applied on the address electrode 15 of the glass substrate for PDP by a screen printing method. And a dielectric layer 1 having a thickness of 10 μm.
Form 7 was dried at 170 ° C. and fired at a firing temperature having a peak temperature of 500 ° C. or higher. <Application of Barrier Rib Forming Layer> A barrier rib forming material ("PX-10" manufactured by NEC Corporation) is formed on the dielectric layer.
8)) and titanium oxide (TiO ₂ ) mixed with a barrier rib-forming material obtained by whitening a black barrier rib material by a screen printing method to apply a uniform, 180 μm-thick layer, and drying at 170 ° C. to 180 ° C. did. Thus, a barrier rib forming layer 8p is formed.

<Preparation of Blast Mask / Barrier Rib Material> First, a mixture having the following inorganic composition was placed in a container made of a fluororesin, and paint conditioner RC-50 was used.
The mixture was mixed for 15 minutes using a 00 (manufactured by Red Devil Co.) to prepare a uniform frit mixture. [Mixture composition] Glass frit (“MB-10A” manufactured by Matsunami Glass Industry Co., Ltd.) (average particle diameter 2.6 μm) 50 parts by weight Colored pigment (“Dipiroxide Side Black # 9510” manufactured by Dainichi Seika Industry Co., Ltd.) 10 Parts by weight Aggregate: α-alumina (“RA-30” manufactured by Iwatani Chemical Industry Co., Ltd.) (average particle size: 1.0 μm) 10 parts by weight

Thereafter, a binder and a solvent were added to the frit mixture prepared above and uniformly mixed to the following composition, and then kneaded with a three-roll mill (Inoue Seisakusho) to prepare a barrier rib paste material. [Paste composition] 20 parts by weight of the above frit mixture 80 parts by weight of Ethocel STD-100FP (manufactured by Dow Chemical Company) 10 parts by weight of diethylene glycol monobutyl ether acetate 10 parts by weight (manufactured by Junsei Chemical Industry Co., Ltd.) 8 parts by weight of screen oil (manufactured by Okuno Pharmaceutical Co., Ltd.) Department

<Coating of Blast Mask and Barrier Rib Material> The blast mask and barrier rib material formed by the above-mentioned method is applied on the white barrier rib forming layer 8p by a screen printing method in a stripe pattern having a thickness of 15 μm. Dry to form a blast mask 8m (FIG. 2)
(D)). In the case of this example, the coating was performed so that the width of the top of the barrier rib was 75 μm and the stripe pitch was 300 μm.

<Blasting and firing> Next, using this blast mask 8m as a mask, a sand blasting apparatus was used, and alumina, zirconia,
Silica mixed powder (Fujimi Incorporated,
Using “FO♯800”), a portion not covered with the blast mask / barrier rib material under the conditions of a jet amount of 100 g / min, a jet pressure of 2 kgf, and a nozzle-substrate distance of 30 mm per nozzle. The lower barrier rib material was removed. After washing, drying and baking at 580 ° C., a black blast mask is left as a residual layer having a thickness of 3 μm on the barrier rib top layer 8t as shown in FIG.
Was obtained, and the structure of the barrier rib 8 was white. The height from the substrate surface to the top of the barrier rib was 120 μm.

The green, blue, and red phosphors are filled between the barrier ribs of the rear plate substrate by a normal process, and dried.
After firing, the glass substrate 11 provided with the phosphor layer 18
And a glass substrate 12 on which display electrodes X and Y, a dielectric layer 16 and the like were separately provided, and the periphery thereof was sealed to complete a PDP. When the characteristics of the substrate thus obtained were examined, PDP characteristics with little reflection of external light and high luminance and high contrast were observed.

[0045]

In order to improve both the contrast and the luminance, it is ideal to make the top layer of the barrier rib black and the other parts white. The manufacture of such a plasma display panel can be performed in a simplified process by using a blast mask / barrier rib material as compared with the conventional twice-coating process. Also, in the conventional method, about 1/3 to 1/2 of the height of the barrier rib is a black barrier rib portion, and the luminance improving effect is reduced. However, in the present invention, the top layer can be made thinner and the phosphor is coated. Almost the entire surface can be made white, so that the efficiency can be improved in terms of improving the luminance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a plasma display panel of the present invention.

FIG. 2 is a cross-sectional view illustrating a step of forming a barrier rib.

FIG. 3 is an exploded perspective view showing a configuration example of an AC type PDP.

[Explanation of symbols]

 Reference Signs List 1 Plasma display panel of the present invention 8 Barrier rib 8p Barrier rib forming layer 8m Blast mask 8b Blast mask base layer 8t Blast mask top layer 11 Glass substrate (back plate) 12 Glass substrate (front plate) 13 Bus electrode 14 Sustain electrode 15 Address electrode 16 , 17 Dielectric layer 18 Phosphor layer 19 Protective film (MgO layer)

[Procedure amendment]

[Submission date] August 4, 1999 (1999.8.4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

DESCRIPTION OF SYMBOLS 1 Plasma display panel of the present invention 8 Barrier rib 8p Barrier rib forming layer 8m Blast mask 8b Barrier rib base layer 8t Barrier rib top layer 11 Glass substrate (back plate) 12 Glass substrate (front plate) 13 Bus electrode 14 Sustain electrode 15 Address electrode 16, 17 Dielectric layer 18 Phosphor layer 19 Protective film (MgO layer)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasushi Danya 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term within Dai Nippon Printing Co., Ltd. 5C027 AA09 5C040 FA01 FA04 GB03 GB14 GF18 GF19

Claims (5)

[Claims] 1. A plasma display panel in which a base layer of a barrier rib is arranged in a light color and a top layer of a barrier layer is formed in a dark color, wherein the top layer of the barrier rib is provided by printing in a stripe pattern. A plasma display panel comprising a blast remaining layer of a material. 2. The method according to claim 1, wherein the thickness of the barrier rib top layer made of dark color is 1 to 5 μm.
The plasma display panel as described in the above. 3. A method for forming a back plate of a plasma display panel by a blast method, wherein a step of providing a barrier rib forming layer on a substrate and a step of forming a blast mask / barrier rib material in which a coloring pigment is dispersed on the barrier rib forming layer are performed. A method for forming a plasma display panel, comprising forming a barrier rib shape by performing blasting after coating in a pattern. 4. The residual layer of the blast mask / barrier rib material after completion of the plasma display panel has a thickness of 1 to 5 μm.
4. The method for forming a plasma display panel according to claim 3, wherein the processing is performed so as to be as follows. 5. A coating material used in the method for forming a plasma display panel according to claim 3, wherein the coating material functions as a blast mask in a blast step, and functions as a dark top layer by a color pigment after the panel is completed. A blast mask / barrier rib material, characterized in that: