JPH10181180A - Method for forming ink layer on projecting pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming an ink layer on a projecting pattern by which it is possible to form a dielectric layer free from transfer omitting on a base including a projecting electrode pattern face, improve the yield, and form a layer on which the dielectric layer is formed with outstanding surface smoothness, uniform film thickness and high distribution accuracy, on a plasma display panel(PDP) or a multilayer electrode plate. SOLUTION: A transfer sheet S with at least, an ink layer 12 containing an inorganic particle of glass frit and a resin to be removed by firing, formed on a base film 11, is laminated on a base 14 with a striped projecting pattern 13 from the ink layer 12 side. When transferring the ink layer 12 to the surface of the base 14 with the projecting pattern 13, the transfer sheet S is laminated in a direction which is parallel with the stripe direction of the projecting pattern 13 to transfer the ink layer 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display such as a plasma display panel (hereinafter, PDP), a field emission display (FED), a fluorescent display, a liquid crystal display, and a striped electrode layer in a multilayer printed wiring board. The present invention relates to a method for forming an ink layer on a convex pattern suitable for forming a dielectric layer forming layer and an insulating layer on the convex pattern by transfer.

[0002]

2. Description of the Related Art In general, a PDP, a multilayer printed wiring board, and the like have a dielectric layer in a layer structure from the viewpoint of enhancing insulation properties or controlling a driving voltage.
The structure will be described using a PDP as an example.

FIG. 5 shows a configuration example of an AC type PDP. This figure shows the front panel and the rear panel separated from each other.
Glass substrates 1 and 2 are arranged in parallel and opposite to each other, and both are held at a fixed interval by a cell barrier 3 provided in parallel with each other on a glass substrate 2 serving as a back plate. . On the back side of the glass substrate 1 serving as the front plate,
A composite electrode composed of a transparent electrode 4 serving as a discharge sustaining electrode and a metal electrode 5 serving as a bus electrode is formed in parallel with each other,
A dielectric layer 6 is formed so as to cover this, and a protective layer (MgO layer) is further formed thereon. On the front side of the glass substrate 2 serving as a back plate, address electrodes 8 are formed between the cell barriers 3 so as to be orthogonal to the composite electrodes with the interposition therebetween, and are formed in parallel with each other.
The fluorescent screen 9 is provided so as to cover the wall surface and the bottom of the cell.

[0006] As shown in FIG. 6, after a base layer 10 made of a dielectric is formed on a glass substrate 2 serving as a back plate,
There is also a structure in which an address electrode 8 is provided, a dielectric layer 6 'is further laminated thereon, and then a cell barrier 3 and a phosphor surface 9 are provided. The AC type PDP is of a surface discharge type, and has a structure in which an AC voltage is applied between composite electrodes on a front panel to discharge by an electric field leaking into a space. In this case, since the alternating current is applied, the direction of the electric field changes according to the frequency.

The DC type PDP differs in that the electrodes have a structure that is not covered with a dielectric layer, but the discharge phenomenon is the same. Then, the phosphor 9 is caused to emit light by the ultraviolet rays generated by the discharge, and the light transmitted through the front plate can be visually recognized by an observer.

Conventionally, such a layer is formed by screen printing using a thick film paste. However, such a layer has a large film thickness distribution, large irregularities on the surface such as meshes, and a large productivity. There is a problem that it is inferior. Therefore, it has been attempted to form a dielectric layer forming layer on a stripe-shaped address electrode or bus electrode by transfer using a transfer sheet in which the dielectric layer forming layer is releasably laminated.

[0007] Such a dielectric layer forming layer contains a large amount of inorganic particles such as glass frit in its ink composition. However, when a transfer sheet is used to transfer and form the dielectric layer forming layer, it is difficult to form the dielectric layer forming layer. In addition, there is a problem that air bubbles are sealed at the boundary between the underlayer and the electrode layer, and insulation failure occurs when the dielectric layer is formed by firing.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a PD
An object of the present invention is to provide a method for forming an ink layer on a convex pattern that can form a dielectric layer without transfer omission on a substrate including a convex electrode pattern on P and a multilayer electrode plate and can improve the yield.

Another object of the present invention is to provide a method of forming an ink layer on a convex pattern which is excellent in surface smoothness of a dielectric layer forming layer, has a uniform film thickness, and enables formation of a layer with good distribution accuracy. On offer.

[0010]

According to the present invention, there is provided a method for forming an ink layer on a convex pattern, comprising the steps of: forming inorganic particles having at least glass frit on a base film on a substrate having a stripe-shaped convex pattern; Laminating a transfer sheet having an ink layer containing the resin to be removed from the ink layer side, when transferring the ink layer onto a substrate having a convex pattern, the transfer sheet,
The ink layer is transferred by laminating in a direction parallel to the stripe direction of the convex pattern.

In the method of forming an ink layer on a convex pattern according to the present invention, the convex pattern is an electrode pattern in a plasma display panel, and the ink layer is an ink layer for forming a dielectric layer. The ink layer is transferred onto a substrate having an electrode pattern.

Further, in the method of forming an ink layer on a convex pattern according to the present invention, the substrate has an electrode pattern on a glass substrate via an underlayer, and the ink layer has an electrode pattern. It is characterized by being transcribed on top.

[0013]

FIG. 1 is a cross-sectional view of a transfer sheet used in the present invention. In FIG.
1 is a base film, and 12 is an ink layer.

It is necessary that the base film 11 is not affected by the solvent in the coating liquid and does not shrink and stretch due to heat treatment in the solvent drying step and the transfer step. For example, polyethylene terephthalate (hereinafter, PET), 1,4-
Polycyclohexylene dimethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide,
Examples include cellulose derivatives such as polystyrene, polypropylene, polysulfone, aramid, polycarbonate, polyvinyl alcohol, cellophane, and cellulose acetate; films and sheets such as polyethylene, polyvinyl chloride, nylon, polyimide, and ionomer; and metal foils such as aluminum and copper. The thickness is 4 μm to 400 μm, preferably 4.5 μm to 200 μm.

Next, the ink layer 12 is composed of inorganic particles having at least glass frit and a resin removed by firing.

The glass frit has a softening point of 3
At 50 ° C. to 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 depending on the lamination object, it is not preferable because it is thermally deformed. If it is lower than 350 ° C., the thermoplastic resin and the like are decomposed and volatilized. It is not preferable because the glass frit is fused before and a void or the like is generated in the layer. The thermal expansion coefficient is 60 × 10 ⁻⁷ / ° C. to 100 × 10 ⁻⁷ /
If the temperature is out of the range, the PDP is not preferable because the difference from the thermal expansion coefficient of the glass substrate is large, causing distortion and the like.

As the inorganic particles, two or more types of inorganic aggregates and inorganic pigments may be used in addition to the glass frit.

The inorganic aggregate is added as necessary, and has a softening point higher than that of glass frit for the purpose of preventing casting at the time of firing and improving denseness. For example, aluminum oxide, boron oxide, silica, titanium oxide,
Various inorganic aggregates such as magnesium oxide, calcium oxide, strontium oxide, barium oxide, and calcium carbonate can be used. The proportion of inorganic aggregate used is 100 glass frit
The amount is preferably 0 to 30 parts by weight based on parts by weight.

In addition, an inorganic pigment may be added. In this case, a general black pigment is used for improving the contrast, and a white pigment is used for improving the luminance.

Next, as the resin to be removed by firing, a resin which is removed by firing at the time of producing a PDP or a multilayer electrode plate, such as a thermoplastic resin or a curable resin is used.

These resins are contained as a binder for inorganic particles and for the purpose of improving transferability. Examples of thermoplastic resins include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, and n-methacrylate. Propyl acrylate, n-
Propyl methacrylate, isopropyl acrylate,
Isopropyl methacrylate, sec-butyl acrylate, sec-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-methylstyrene, N-vinyl-2-
Examples thereof include polymers or copolymers composed of one or more kinds such as pyrrolidone and cellulose derivatives such as ethyl cellulose.

In particular, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert -Butyl acrylate,
polymers or copolymers of one or more of tert-butyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, and the like;
Ethyl cellulose is preferred.

The curable resin is one that is decomposed and removed during firing after curing, and a known ionizing radiation curable resin or a thermosetting resin can be used.
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. Examples of the prepolymer and oligomer include unsaturated polyesters such as a condensate of an unsaturated dicarboxylic acid and a polyhydric alcohol, methacrylates such as an epoxy resin, polyester methacrylate, polyether methacrylate, and polyol methacrylate, polyester acrylate, polyether acrylate, and polyol. Acrylates such as acrylate are exemplified.

The monomer includes a compound having at least one polymerizable carbon-carbon unsaturated bond. For example, allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate,
Dicyclopentanyl acrylate, dicyclopentenyl acrylate, 2-ethylhexyl acrylate, glycerol acrylate, glycidyl acrylate, 2-
Hydroxyethyl acrylate, 2-hydroxypropyl acrylate, isobonyl acrylate, isodexyl acrylate, isooctyl acrylate, lauryl acrylate, 2-methoxyethyl acrylate, methoxyethylene glycol acrylate, phenoxyethyl acrylate, stearyl acrylate, ethylene glycol diacrylate, diethylene glycol Diacrylate, 1,4-butanediol diacrylate,
1,5-pentanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-propanediol diacrylate, 1,4-cyclohexanediol diacrylate, 2,2-dimethylolpropane diacrylate, glycerol diacrylate, Tripropylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, polyoxyethylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, triethylene glycol diacrylate, polyoxypropyl trimethylolpropane triacrylate , Butylene glycol diacrylate, 1,2,4-butanetriol triacrylate, 2,2 4-trimethyl-1,3-pentanediol diacrylate, diallyl fumarate, 1,1
0-decanediol dimethyl acrylate, dipentaerythritol hexaacrylate, and the above acrylate compound changed to a methacrylate compound, γ-methacryloxypropyltrimethoxysilane, 1-vinyl-2-
One or a mixture of two or more such as pyrrolidone is mentioned.

In particular, in the case of an ultraviolet curable type, benzophenone, methyl o-benzoylbenzoate, 4,4-bis (dimethylamino) benzophenone, and 4,4-bis (diethylamino) are used as photoinitiators in the composition. Benzophenone, α-aminoacetophenone, 4,4-dichlorobenzophenone, 4-benzoyl-4-methyldiphenylketone, dibenzylketone, fluorenone, 2,2-
Diethoxyacetophenone, 2,2-dimethoxy-2-
Phenylacetophenone, 2-hydroxy-2-methylpropiophenone, p-tert-butyldichloroacetophenone, thioxanthone, 2-methylthioxanthone, 2-chlorothioxanthone, 2-isopropylthioxanthone, diethylthioxanthone, benzyldimethylketal, benzylmethoxyethylacetal , Benzoin methyl ether, benzoin butyl ether, anthraquinone, 2-tert-butylanthraquinone,
2-amylanthraquinone, β-chloroanthraquinone, anthrone, benzanthrone, dibenzsuberone, methyleneanthrone, 4-azidobenzylacetophenone, 2,6-bis (p-azidobenzylidene) cyclohexane, 2,6-bis (p-azidobenzylidene)
-4-methylcyclohexanone, 2-phenyl-1,2
-Butadione-2- (o-methoxycarbonyl) oxime, 1-phenyl-propanedione-2- (o-ethoxycarbonyl) oxime, 1,3-diphenyl-propanetrione-2- (o-ethoxycarbonyl) oxime, -Phenyl-3-ethoxy-propanetrione-
2- (o-benzoyl) oxime, Michler's ketone, 2
-Methyl- [4- (methylthio) phenyl] -2-morpholino-1-propane, naphthalenesulfonyl chloride, quinoline sulfonyl chloride, n-phenylthioacridone, 4,4-azobisisobutyronitrile,
Photoreducing dyes such as diphenyl disulfide, benzothiazole disulfide, triphenylphosphine, camphorquinone, carbon tetrabromide, tribromophenyl sulfone, benzoyl peroxide, eosin, and methylene blue and reducing agents such as ascorbic acid and triethanolamine Combinations and the like can be mentioned, and one or more of these photoinitiators may be used in combination.

When a photosensitive resin is used as the curable resin, the ink layer is transferred onto a substrate having an electrode pattern,
The dielectric layer can be patterned by patterning through a mask.

The use ratio of the inorganic particles to the resin is 3 to 70 parts by weight, preferably 10 to 50 parts by weight, based on 100 parts by weight of the inorganic particles. When the amount of the resin in the ink layer is less than 3 parts by weight, the holding property of the ink layer is low, and in particular, the storage property in the wound state and the handling property are problematic, and the transferability is further deteriorated.
If the amount is more than the weight part, carbon remains in the film after firing, and the quality is deteriorated.

Further, a plasticizer, a dispersant, an antisettling agent, an antifoaming agent, a release agent, a leveling agent and the like are added to the ink layer as required.

The plasticizer is added for the purpose of improving the transferability and the fluidity of the ink. For example, normal alkyl phthalates such as dimethyl phthalate, dibutyl phthalate and di-n-octyl phthalate, and di-2-ethylhexyl phthalate Phthalic acid esters such as diisodecyl phthalate, butyl benzyl phthalate, diisononyl phthalate, ethyl phthalethyl glycolate, butyl phthalyl butyl glycolate, tri-2-ethylhexyl trimellitate, tri-n-alkyl trimellitate, triiso Trimellitate esters such as nonyl trimellitate and 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 Aliphatic dibasic acid esters such as citrate and acetyl tributyl citrate, glycol derivatives such as polyethylene glycol benzoate, triethylene glycol di- (2-ethylhexoate) and polyglycol ether;
Glycerol derivatives such as glycerol triacetate and glycerol diacetyl monolaurate; polyesters composed of sebacic acid, adipic acid, azelaic acid, phthalic acid, etc .; low molecular weight polyethers having a molecular weight of 300 to 3,000; low molecular weight poly-α-styrene , The same low molecular weight polystyrene, trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri-2-ethylhexyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylendiphenyl Phosphate,
Orthophosphates such as 2-ethylhexyldiphenyl phosphate, ricinoleates such as methylacetyl ricinoleate, poly-1,3-butanediol adipate, polyester epoxidized esters such as epoxidized soybean oil, glycerin triacetate, Acetates such as 2-ethylhexyl acetate are exemplified.

The dispersant and the anti-settling agent are intended to improve the dispersibility and anti-settling property of the inorganic particles. Examples of the dispersant include a phosphate ester type, a silicone type, a castor oil ester type, and various interfacial lubricants. Examples of the defoaming agent include, for example, silicone type, acrylic type, various interfacial lubricating agents, etc., and examples of the release agent include silicone type, fluorine oil type, paraffin type, fatty acid type, fatty acid ester type, castor oil. Examples include a system, a wax, and a compound type, and examples of the leveling agent include a fluorine-based, silicone-based, and various interfacial lubricating agents, each of which is added in an appropriate amount.

The above-mentioned materials for the formation include anions such as methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, toluene, xylene, cyclohexanone, methylene chloride, 3-methoxybutyl acetate, 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, α- Or β
-Dissolve or disperse in terpenes such as terpionaire, and die-coat, blade-coat,
It is applied by a comma coat, a roll coat, a gravure reverse coat method, a gravure direct method, a slit reverse method, or the like, and dried to have a predetermined film thickness.

In the transfer sheet, a protective film may be laminated on the ink layer 12 as necessary, and the protective film may be laminated on the ink layer 12 via an adhesive layer as necessary. Good. Further, for the purpose of improving transferability, the ink layer 12 is coated with the base film 1.
1 may be laminated via a release layer as needed, and a heat-resistant layer may be provided as necessary on the surface of the base film 11 opposite to the surface on which the ink layer 12 is provided. Further, the transfer sheet may have a sheet shape or a roll shape.

Next, the method of transferring an ink layer to a convex pattern according to the present invention will be described by taking as an example a method of transferring and forming a dielectric layer forming layer on a PDP panel substrate using the transfer sheet prepared above. I do.

FIG. 2A shows a PD having an electrode pattern.
FIG. 3B is a plan view of a P substrate, and FIG.
3 is a cross-sectional view in the XY directions of the PDP panel, in which K is a PDP substrate having an electrode pattern, 13 is an electrode layer, and 14 is a glass substrate in a PDP panel. The arrow direction in the drawing indicates the lamination direction of the transfer sheet.

The PDP panel shown in FIGS. 2A and 2B is a transfer member of the ink layer in the present invention, and has an electrode layer 13 laminated on a glass substrate 14.

The electrode layer may be formed by screen printing or intaglio offset printing using an ink composed of at least inorganic particles made of glass frit, a resin removed by firing, and conductive particles. Alternatively, a photosensitive electrode paste may be used, and may be formed by solid printing by screen printing, die coating, or the like, and then exposing and developing into an electrode pattern.

Further, a photosensitive electrode paste is formed on the same base film as described above to form a layer to form a transfer sheet. The electrode forming layer is transferred onto a glass substrate, exposed to an electrode pattern, developed, and developed. May be. At the time of development, development by wet processing or peeling development may be mentioned.
Alternatively, a patterned electrode forming layer may be transferred and formed on a glass substrate using a transfer sheet in which an electrode forming layer is formed in a pattern on a base film.

In the method of forming an ink layer on a convex pattern according to the present invention, the method may be applied after firing the electrode forming layer to form the electrode layer, or may be applied on the convex electrode forming layer and fired. Then, the electrode layer and the dielectric layer may be formed simultaneously.

The electrode layer may be a thin-film electrode formed by directly depositing an electrode material on a glass substrate by vapor deposition or sputtering.

FIG. 3 is a view for explaining a method of forming an ink layer on a convex pattern according to the present invention. In the figure, R is a thermal laminator, and the same reference numerals as those in FIGS. .

As shown in FIG. 3, the method for forming an ink layer on a convex pattern according to the present invention comprises the steps of: forming an inorganic particle having at least glass frit on a base film on a substrate K having a stripe-shaped convex pattern; When a transfer sheet S having an ink layer containing a resin to be removed by baking is laminated from the ink layer 12 side and the ink layer 12 is transferred onto the substrate S having a convex pattern, the transfer sheet S is 2A, the ink layer 12 is transferred by laminating with a thermal laminator R in the direction indicated by the arrow, that is, in the direction parallel to the stripe direction of the convex pattern 13. FIG. FIG. 4 shows a state where the ink layer 12 has been transferred.

The ink layer 12 is transferred onto the convex electrode pattern 13 while being heated and softened by the thermal laminator R. However, since the ink layer 12 is laminated in a direction parallel to the stripe direction of the convex electrode pattern 13, the convex electrode pattern is laminated. The ink layer can be transferred without entrapping air bubbles at the interface between the electrode and the glass substrate in the length direction of the pattern. The transferred dielectric layer forming layer is baked to form a dielectric layer. However, a dielectric layer without transfer omission can be formed, and the yield can be improved.

Further, an underlayer is formed on a glass substrate, and an electrode is formed on the underlayer as a substrate, and a dielectric layer forming layer is formed on the substrate by transferring it in a direction parallel to the electrode stripes. May be.

In the above description, the dielectric layer forming layer 12 was transferred and formed on the glass substrate having the electrode layer 13. However, after the base forming layer and the electrode forming layer were sequentially formed on the glass substrate, the projection pattern of the present invention was formed. The dielectric layer forming layer may be coated and formed by the ink layer forming method described above, and the base forming layer, the electrode forming layer, and the dielectric layer forming layer may be fired simultaneously, whereby a PDP panel member can be efficiently produced.

[0045]

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

(Example) (Formation of Underlayer) Layer Composition: Glass frit (main component: PbO, SiO ₂ , B ₂ O ₃ (alkali-free)) (Softening point of glass frit: 570 ° C., Tg: 480 ° C., thermal expansion) Coefficient α ₃₀₀ = 83 × 10 ⁻⁷ / ° C., average particle diameter 1 μm, 5% by weight of particles having a particle diameter of 20 μm or more) 65 parts by weight Al ₂ O ₃ (average particle diameter 4 μm, particle diameter 11 parts by weight CuO (3 μm average particle diameter, 5% by weight particles having a particle diameter of 20 μm or more) 4 parts by weight Polymethyl methacrylate・ 10 parts by weight ・ Dibutyl phthalate ・ ・ ・ ・ 10 parts by weight ・ Isopropyl alcohol ・ ・ ・ ・ 15 parts by weight ・ Methyl ethyl ketone ・ ・ ・ ・ 10 parts by weight using a bead mill, mix and disperse the mixture, and then put on PET film. And Rukoto coated, dried at 100 ° C., to form an ink layer having a thickness of 20 ± 2 [mu] m. The surface of the formed ink layer was excellent in smoothness. A polyethylene film was laminated on the surface of the ink layer to prepare a transfer sheet.

The polyethylene film was peeled off, and an auto cut laminator (Model ACL-91, manufactured by Asahi Kasei Corporation)
00), the substrate was pre-heated at a temperature of 60 ° C. and the temperature of the ramirole was transferred at 100 ° C. to form a base layer on a glass substrate.

(Formation of Electrode Forming Layer) The following composition: photosensitive resin (the following composition): 20 parts by weight; silver powder (average particle diameter: 1 μm, 5% by weight of particles having a particle diameter of 15 μm or more) 70 weight parts Glass frit (main component: Bi ₂ O ₃ , SiO ₂ , B ₂ O ₃ (non-alkali) Average particle size 1 μm, 1% by weight of particles having a particle size of 15 μm or more, softening point 600 ° C.) ··· 5 parts by weight · Propylene glycol monomethyl ether · · · 20 parts by weight (Breakdown of photosensitive resin · Alkaline developable binder polymer (methyl methacrylate / methacrylic acid copolymer with 7 mol% of glycidyl acrylate added, 100 mg KOH / g) 100 parts by weight Polyoxyethylated trimethylopropane triacrylate 60 parts by weight Photoinitiator (Ciba-Geigy) The company made "Irgacure 369") 5 parts by weight) of the electrode forming layer coating solution was applied by a slit reverse coating on a PET film, a dry film thickness of 15μm
An electrode-forming transfer sheet having the electrode-forming layer was prepared.

Next, the transfer sheet for electrode formation was laminated on the underlayer formation layer obtained above using a hot roll at 90 ° C. from the electrode formation layer side. After irradiating 100 mJ / cm ^{2 of} ultraviolet light from above the PET film through the negative pattern mask of the address electrode of the PDP, the PET film is peeled off, and the unexposed part is peeled off using a 0.5% aqueous solution of sodium carbonate aqueous solution. And developing to form an electrode forming layer.

The entire substrate obtained was fired at 600 ° C. to form a 9 μm-thick underlayer and a 6 μm-thick, 70 μm-wide striped address electrode pattern.

(Method of Forming Ink Layer on Convex Pattern) Composition Glass frit Main component: Bi ₂ O ₃ , ZnO ₂ , B ₂ O ₃ (alkali-free) Particles having an average particle size of 3 μm and a particle size of 20 μm or more 70% by weight TiO ₂ (4 μm average particle diameter, 5% by weight of particles having a particle diameter of 20 μm or more) 3 parts by weight Al ₂ O ₃ (4 μm average particle diameter) 7% by weight (softening point of the above-mentioned mixture of inorganic particles: 570 ° C, Tg: 485 ° C, coefficient of thermal expansion α ₃₀₀ = 80 × 10 ^-7 / ° C)・ N-butyl methacrylate / hydroxyethylhexyl methacrylate copolymer (8/2) 10 parts by weight ・ benzyl butyl phthalate 7 parts by weight ・ isopropyl alcohol 15 parts by weight ・ methyl ethyl ketone After mixing and dispersing 5 parts by weight using a bead mill, a comma coat was applied on a PET film, dried at 100 ° C. to form an ink layer having a thickness of 20 ± 2 μm, and a polyethylene film was laminated.

Next, the polyethylene film is peeled off,
Auto cut laminator (Asahi Kasei Corporation, Model AC
L-9100) using a substrate preheat temperature of 80 ° C.
Under the transfer conditions of a lami roll temperature of 100 ° C., the above-prepared PDP substrate was laminated as shown in FIG. 3 in the direction of the arrow shown in FIG. 2A, and the dielectric layer forming layer 12 was formed as shown in FIG. Transcribed.

Next, firing was performed at a peak temperature of 570 ° C. to obtain a dielectric layer having a thickness of 10 ± 1 μm after firing. There was no omission and a uniform dielectric layer was formed.

(Comparative Example) In the above embodiment, the laminating direction of the transfer sheet for forming a dielectric layer was changed to a direction orthogonal to the direction of the arrow in FIG. The layers were similarly transferred. The appearance after transfer showed unevenness due to the inclusion of bubbles.

When the film was fired at a peak temperature of 570 ° C. in the same manner as in the example, the film thickness after firing was 5 to 10 μm, and the appearance after firing remained uneven.

[0056]

According to the method for forming an ink layer on a convex pattern of the present invention, a dielectric layer without transfer omission can be formed on a substrate including a convex electrode pattern, and the yield can be improved.
The production time can be shortened, and the surface of the dielectric layer formed by transfer corresponds to the surface of the base film, so that the surface is excellent in surface smoothness, the film thickness is uniform, and the distribution accuracy can be excellent. .

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a transfer sheet used in the present invention in a sectional view thereof.

FIG. 2 is a diagram for explaining a substrate having a convex electrode pattern.

FIG. 3 is a diagram illustrating a method for forming an ink layer on a convex pattern according to the present invention.

FIG. 4 is a diagram for explaining a state in which an ink layer is laminated on a convex pattern.

FIG. 5 is a diagram for explaining an AC type plasma display panel.

FIG. 6 is a diagram for explaining another example of the AC type plasma display panel.

[Explanation of symbols]

1 is a front plate, 2 is a back plate, 3 is a cell barrier, 4 is a sustain electrode, 5 is a bus electrode, 6, 6 'are dielectric layers, and 7 is MgO.
Layer, 8 an address electrode, 9 a phosphor layer, 10 an underlayer,
S is a transfer sheet, K is a PDP substrate having an electrode pattern, 11 is a base film, 12 is an ink layer, 13 is an electrode layer, and 14 is a glass substrate in a PDP panel.

Claims (3)

[Claims] 1. A transfer sheet having an ink layer containing, on a substrate having a stripe-shaped convex pattern, inorganic particles having at least a glass frit on a base film and a resin to be removed by firing, the ink layer is provided. When laminating from the side and transferring the ink layer onto a substrate having a convex pattern, the transfer sheet is laminated in a direction parallel to the stripe direction of the convex pattern to transfer the ink layer. A method for forming an ink layer on a convex pattern. 2. The method according to claim 1, wherein the convex pattern is an electrode pattern in a plasma display panel, the ink layer is an ink layer for forming a dielectric layer, and the ink layer is transferred onto a substrate having the electrode pattern. The method for forming an ink layer on a convex pattern according to claim 1. 3. The substrate according to claim 2, wherein the substrate has an electrode pattern on a glass substrate via an underlayer, and the ink layer is transferred onto the underlayer having the electrode pattern. A method for forming an ink layer on a convex pattern as described in the above.