KR20080090151A - Plasma display panel and method of preparing the same - Google Patents

Abstract

A plasma display panel and a manufacturing method thereof are provided to reduce a manufacturing cost of the PDP(Plasma Display Panel) by decreasing the amount of silver electrodes and black pigments. A plasma display panel includes an upper surface and a lower substrate. A scan electrode(120) and a sustain electrode(130) are formed on a rear surface of a transparent substrate. An address electrode and a barrier rib are formed on the lower substrate. The scan or sustain electrode is made of a conductive black group material layer with maximum resistivity of 15 muФcm. The black group material has a maximum black degree, which is measured by a color difference measuring unit, of 42. The scan or sustain electrode includes transparent electrode layers(121,131), which are formed between the conductive black group material layer and the transparent substrate. A width of the transparent electrode layer is equal to or greater than that of the conductive black group material.

Description

Plasma display panel and manufacturing method thereof {PLASMA DISPLAY PANEL AND METHOD OF PREPARING THE SAME}

1 is a view schematically showing a structure of a general plasma display panel.

2 is a cross-sectional view of a portion of an upper substrate structure of an example of a conventional plasma display panel having a black layer.

3 is a cross-sectional view of a portion of an upper substrate structure of another example of a plasma display panel having a conventional black layer.

4 is a cross-sectional view of a portion of an upper substrate structure of an embodiment of a plasma display panel of the present invention.

5 is a cross-sectional view of a portion of an upper substrate structure of another embodiment of the plasma display panel of the present invention.

Explanation of symbols on the main parts of the drawings

10: fluorescent layer 20: dielectric layer

30: protective layer 40: black stripe

100: upper substrate 110: transparent substrate

120: scan electrode 121: transparent electrode (scan electrode side)

122: black layer (scan electrode side) 123: bus electrode (scan electrode side)

124: integral bus electrode (scan electrode side) 130: sustain electrode

131: transparent electrode (holding electrode side) 132: black layer (holding electrode side)

133: bus electrode (holding electrode side) 134: integrated bus electrode (holding electrode side)

200: lower substrate 210: address electrode

220: bulkhead

The present invention relates to a plasma display panel and a method of manufacturing the same, and more particularly, in the manufacture of PDP by reducing the two-step process to one step by forming a conventional PDP electrode consisting of a black layer and a conductive layer as an integrated electrode; The present invention relates to a plasma display panel and a method of manufacturing the same, which can simplify the process, reduce the amount of the Ag electrode and the black pigment, thereby significantly reducing the PDP manufacturing cost, and greatly reduce the defects caused by PDP manufacturing.

In recent years, in the display devices, as the demand for larger size, higher density, higher precision, and higher reliability increases, various pattern processing techniques have been developed, and various fine electrode formations suitable for such various pattern processing techniques have been made. Research into the paste and how to reduce the production cost is being actively researched.

Plasma display panels (hereinafter, referred to as 'PDP') are used in various fields because of their fast response speed and easy enlargement when compared to liquid crystal panels, and their general structures are as shown in FIG. In the conventional method of forming such a PDP panel, as shown in FIGS. 2 to 3, a transparent electrode (layer) made of ITO or the like is formed on a transparent substrate such as glass constituting the upper substrate, and contrast is improved thereon. And a black layer formed of a paste containing a glass frit and a black pigment to remove the reflected light of the metal line constituting the bus electrode, and formed of a paste including a metal powder and glass frit having excellent electrical conductivity thereon. A two-layer structure for forming a bus electrode (conductive layer) was formed through two printing processes to manufacture a PDP upper substrate. FIG. 2 is a structure formed by dividing each cell and cells of a PDP panel by dividing a black stripe which improves contrast (in this case, the black layer has an electrical conductivity or a thin thickness thereof, so that conductivity is achieved. 3 is a structure in which such a black stripe and a black layer are formed at one time. In this case, since the black layer must be an insulating material for insulation between the transparent electrodes, the thickness of the bus electrode is reduced. And conduction between the transparent electrode.

However, the above method has a high process cost for the formation of a two-layer structure, has a high defect rate due to a bad effect on the product properties due to the problem of the combination of the black layer and the conductive layer, and costly to form a PDP electrode In order to solve this problem, various studies were being conducted.

In order to solve the problems of the prior art as described above, the present invention can simplify the manufacturing process by forming a PDP electrode integrating the black layer and the conductive layer, it is possible to significantly reduce the PDP manufacturing cost by reducing the amount of black pigment, An object of the present invention is to provide a plasma display panel that can greatly reduce defects caused by PDP manufacturing.

In addition, the present invention uses the photolithography equipment in the PDP manufacturing method to produce a PDP without additional equipment, and to simplify the process by forming a PDP electrode integrated with a black layer and a conductive layer, the amount of Ag electrode and black pigment The purpose of the present invention is to provide a method for manufacturing a plasma display panel, which can significantly reduce the PDP manufacturing cost and greatly reduce defects caused by PDP manufacturing.

In order to achieve the above object, the present invention

A plasma display panel comprising an upper substrate on which a scan electrode and a sustain electrode are formed on a lower surface of a transparent substrate, and a lower substrate on which an address electrode and a partition are formed.

The scan electrode or the sustain electrode provides a plasma display panel comprising a layer of conductive black material having a maximum brightness (blackness) measured using a color difference meter of 42 and a maximum resistivity of 15 uΩcm.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a plasma display panel, wherein an upper substrate (100) having a scan electrode (120) and a sustain electrode (130) formed on a lower surface of the transparent substrate (110), an address electrode (210), and a partition wall (220) are formed. In the plasma display panel including the lower substrate 200, the scan electrode 120 or the sustain electrode 130 has a maximum brightness (black) of 42 and a specific resistance of 15 uΩ at a maximum measured using a color difference meter. It is characterized by consisting of a layer of conductive black material of cm. In addition, according to the present invention, the scan electrode 120 or the sustain electrode 130 has a transparent electrode having a width equal to or greater than that of the conductive black based material layer between the conductive black based material layer and the transparent substrate 110. 121, 131) may further comprise a layer.

For convenience of description, first, a case of including a scan electrode or a sustain electrode having a transparent electrode will be described first. That is, the conventional scan electrode or sustain electrode has a black layer on top of a bus electrode made of metal in order to improve contrast and prevent reflection of metal lines, as shown in FIGS. 2 to 3. The two-layer structure of the same bus electrode and the black layer is composed of a one-layer structure composed of a conductive black-based material layer having a maximum brightness (black) of 42 and a specific resistance of 15 uΩcm at maximum using a color difference meter. It is done.

The function of the black layer is to prevent reflection and the transmission of light emitted from the phosphor, and the function of the bus electrode is to transmit electric signals, so that the black condition, which satisfies this at the same time, is 42, and the specific resistance is 15 uΩcm. As shown in FIG. 5 as a specific embodiment of the conductive black based material layer, the two-layer structure shown in FIGS. 2 to 3 is configured as a single layer structure to simplify the manufacturing process. The effect of reducing the manufacturing cost can be obtained. Preferably, the black and white material has a blackness of 40 or less and a resistive layer of black material having a resistivity of 10 uΩcm or less.

In addition, in the case of a PDP having a structure without a transparent electrode, which is recently developed, a plurality of scan electrodes and a sustain electrode are provided in one cell, as disclosed in Korean Patent Laid-Open Publication No. 2003-43945. In this case, a scan electrode and The sustain electrode has a two-layer structure consisting of only a black layer and a metal layer without a transparent electrode. In the case of the present invention, as shown in FIG. 4, the scan electrode or the sustain electrode is formed using a color difference meter. The measured brightness (black) is 42 and the resistivity is formed only by the conductive black-based material layer having a maximum of 15 uΩcm to perform all the functions of the two-layer structure as a single layer structure. Through this, the same effect as described above can be obtained even in the case of PDP without transparent electrode. Preferably, the black and white material has a blackness of 40 or less and a resistive layer of black material having a resistivity of 10 uΩcm or less.

Here, the transparent substrate may correspond to various transparent materials including glass applied to a known PDP manufacturing, and the transparent electrode may be applied to various transparent electrode materials including ITO. In addition, the scan electrode or the sustain electrode in the present specification is used to mean a bus electrode.

Preferably, the conductive black-based material layer having such characteristics can be formed with a photosensitive face for forming a PDP electrode described below. That is, the photosensitive paste for forming a PDP electrode according to the present invention comprises a) a metal powder for an electrode; b) black glass frit; c) black pigments; d) photosensitive organic components; e) a sintering aid. More preferably, the photosensitive paste for forming a PDP electrode includes a) 40 to 80 parts by weight of the metal powder for the electrode; b) 1 to 10 parts by weight of black glass frit; 1 to 10 parts by weight of black pigment; d) 7 to 40 parts by weight of the photosensitive organic component; e) 0.1 to 5 parts by weight of the sintering aid.

In the photosensitive paste for forming a PDP electrode applied to the present invention, the a) metal powder may be a metal component used for manufacturing a conventional PDP bus electrode. Of course, silver (Ag) of 0.05 to 10 μm may be used. Powders can be used.

Preferably, the metal powder may be used by mixing silver (Ag) powder and aluminum powder. In this case, the manufacturing cost of the PDP bus electrode may be reduced by reducing the amount of expensive silver (Ag) powder used. When the silver (Ag) powder and the aluminum powder are mixed and used, the aluminum powder and the silver (Ag) powder may be included in a weight ratio of 1: 6 to 1: 9. If it is in the above range there is an advantage that can achieve both electrical resistance and cost reduction effect at the same time. In addition, the aluminum powder is preferably a spherical powder having a particle size of 1.5 to 5 ㎛, and the silver (Ag) powder is preferably a spherical powder having a particle size of 0.05 to 5 ㎛. In the above range, the cost and stability of the paste and the formation of an electrode requiring a fine pattern are easy, and the electrical resistance of the formed PDP electrode and adhesiveness with the substrate are advantageous.

Preferably, the tap density of the metal powder is preferably 4 g / cm ³ or more, and more preferably, the tap density is at least 5 g / cm ³ . If within the above range there is an advantage to improve the sinterability and electrical resistance of the PDP electrode.

In addition, the silver (Ag) powder is preferably a silver (Ag) powder having a particle size of 0.05 to 0.2 ㎛ 0 to 1 parts by weight based on 100 parts by weight of the total silver (Ag) powder, in this case dispersibility and operation of the paste There is an advantage of facilitating sex.

Preferably, the particle size distribution of the silver (Ag) powder may be one of D ₁₀ = 0.1 to 0.7 ㎛, D ₅₀ = 0.5 to 2.0 ㎛, D ₉₀ = 1.4 to 5 ㎛.

In the photosensitive paste for forming a PDP electrode, which may be applied to the present invention, the metal powder may be included in an amount of 40 to 80 parts by weight based on the total paste, and in the above range, the electrical resistance of the electrode, adhesion to the substrate, sintering property, and electrode pattern. All are good in developability.

B) The black glass frit used in the photosensitive paste for forming PDP electrodes applicable to the present invention serves to enhance adhesion and plastic strength with the substrate, and to increase blackness as described above. And the conductive layer (metal layer) make it possible to form an integrated PDP electrode. Preferably, the black glass frit has a resin of 60 or less when measured using a colorimeter (minolta CR 300) whose blackness (color L *) is corrected using a standard white plate. L * represents the brightness when pure black is 0 and pure white is 100, and the closer to 0, the pure black. In this case, the blackness of the integrated PDP electrode can be made 42 or less, and the electrical properties of the paste can be satisfied at the same time.

In addition, the black glass frit may use a glass having a softening temperature (Ts) of 300 to 500 ° C, and preferably, a softening temperature (Ts) of 350 to 450 ° C. The black glass frit mesh formula ion, and (alkali, alkaline earth) may contain and containing V, Cr, Mn, Fe, one or a transition element such as Co, Ni or more of the, in particular example 1) V ₂ O ₅ -P ₂ O _{5 type} or 2) CuO-MnO type black glass frit may be used.

In particular, the 1) V ₂ O ₅ -P ₂ O ₅ system can be used V ₂ O ₅ -P ₂ O ₅ -ZnO-BaO glass frit, preferably V ₂ O ₅ 35 to 50 mol%, P ₂ It is preferable to include 25 to 35 mol% O ₅ , 5 to 15 mol% ZnO, 5 to 15 mol% BaO, and optionally Li ₂ O, or R ₂ O ₃ , where R is a metallic element. It may be used that further comprises from 15 mol%. More preferably it is recommended that the sum of the V ₂ O ₅ and P ₂ O ₅ containing at least 70 mol% of the glass frit.

In addition, CuO-MnO-Bi ₂ O ₃ -BaO glass frit may be used as the 2) CuO-MnO-based black glass frit, preferably CuO 1 to 15 mol%, MnO 1 to 15 mol%, Bi2O3 40 to It is preferable to include 80 mol%, BaO 1 to 10 mol%, and may optionally further include ZnO 0 to 15 mol% or R ₂ O ₃ 0 to 15 mol%.

B) The black glass frit used in the photosensitive paste for forming a PDP electrode in the present invention may be included in an amount of 1 to 10 parts by weight. When it is in the said range, adhesiveness with a base material and favorable electrical resistance can be exhibited.

C) black pigment used in the photosensitive paste for PDP electrode formation that can be applied to the present invention improves the contrast, the black pigment can be used as the black pigment used in the conventional formation of the black layer of the PDP electrode One specific example is a Cu-Cr based or Cobalt based black pigment. In addition, the average particle size of the black pigment is preferably 0.1 to 2.0 ㎛, preferably 0.5 to 1.0 ㎛. In this case, there is a further advantage in dispersing the paste and forming a PDP electrode having a precise structure.

C) Black pigment used in the photosensitive paste for forming a PDP electrode that can be applied to the present invention is preferably included 1 to 10 parts by weight. When it is in the said range, blackness and electrical resistance can be represented favorably.

Preferably, in the photosensitive paste for forming a PDP electrode that can be applied to the present invention, the b) black glass frit and c) the black pigment may be included in a weight ratio of 1: 1.5 to 3: 1. In the above range, the blackness of the electrode formed of the paste may be obtained to be 42 or less, or the specific resistance may be obtained to be 15 uΩcm or less, through which the blackness of the integrated PDP electrode, adhesion to the substrate, and electrical resistance may be simultaneously obtained. It makes it favorable and there exists an effect which makes unit price of a paste cheap.

D) The photosensitive organic component used in the photosensitive paste for forming a PDP electrode that can be applied to the present invention may be a photosensitive resin composition to which a photolithography process can be applied, preferably iii) an organic binder; Ii) crosslinkable monomers; Iii) a photoinitiator.

The organic binder acts to impart bonding and developability of the paste component before firing, preferably an acrylate resin, and the acrylate resin polymerizes an unsaturated carboxylic acid monomer, an aromatic monomer, and an acrylic monomer. Can be prepared.

The unsaturated carboxylic acid monomer acts to increase the elasticity of the polymer through hydrogen bonding in the polymer, and specifically, acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, vinyl acetate, or an acid anhydride form thereof may be used. Can be.

The unsaturated carboxylic acid monomer is preferably contained in 20 to 70% by weight in the total monomers used in the production of acrylate resin, when the content is in the above range, the elastic properties of the polymer, the prevention of gelation during polymerization, and the degree of polymerization control We can satisfy all.

The aromatic monomer acts to form adhesion with the substrate and a stable pattern, specifically, styrene, benzyl methacrylate, benzyl acrylate, phenyl acrylate, phenyl methacrylate, 2-nitrophenyl acrylate, 4-nitro Phenyl acrylate, 2-nitrophenyl methacrylate, 4-nitrophenyl methacrylate, 2-nitrobenzyl methacrylate, 4-nitrobenzyl methacrylate, 2-chlorophenyl acrylate, 4-chlorophenyl acrylate, 2-chlorophenyl methacrylate, 4-chlorophenyl methacrylate, etc. can be used.

The aromatic monomer is preferably included in 10 to 40% by weight, more preferably 15 to 25% by weight in the total monomer used in the production of the acrylate resin. If the content is in the above range, it may be able to satisfy the adhesion with the substrate, the adhesion of the pattern, the straightness of the formed pattern, the stable pattern implementation, easy removal during the firing process.

In addition to the unsaturated carboxylic acid monomer and the aromatic monomer, the acrylic monomer used in the production of the acrylate resin serves to control the glass transition temperature and polarity of the polymer.

As the acrylic monomer, 2-hydroxyethyl (meth) acrylate, 2-hydroxyoctyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl acrylate or the like can be used. In addition, the content is preferably included in 20 to 60% by weight of the total monomer used in the production of the acrylate resin in consideration of the glass transition temperature, heat resistance, intimacy with the substrate and the like of the polymer.

The acrylate resin prepared by polymerizing the monomers as described above may be prepared by polymerizing in a solvent to prevent gelation of unsaturated carboxylic acid monomers, aromatic monomers, and acrylic monomers and to control proper volatility.

Examples of the solvent include propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, propylene glycol monomethyl ether propionate, ethyl ether propionate, terpinol, propylene glycol monomethyl ether acetate, dimethylamino formaldehyde, and methyl ethyl. Ketone, butyl carbitol, butyl carbitol acetate, gamma butyrolactone, or ethyl lactate may be used alone or in combination of two or more thereof.

The acrylate resin obtained by polymerizing such monomers in the presence of a solvent preferably has a weight average molecular weight of 10,000 to 100,000, more preferably 20,000 to 50,000. In the above range, there is an advantage that the developability is improved.

In the present invention, the organic binder is preferably contained in 5 to 30 parts by weight of the photosensitive organic component, when within the range is suitable for the formation of the micro-electrode pattern, the workability is good, the pattern is not entangled during firing Do not.

In addition, the crosslinkable monomers provide photocurability to paste and promote developability, and specific examples thereof include 2-hydroxyethyl (meth) acrylate, 2-hydroxyoctyl (meth) acrylate, and methyl (meth). ) Acrylic acid, ethyl (meth) acrylate, n-butyl acrylate, etc. are used alone or in combination, or polyesters of polybasic acids such as phthalic acid, itaconic acid and maleic acid succinic acid with hydroxyethyl (meth) acrylate Can be used.

The crosslinkable monomer may be included in the photosensitive organic component in an amount of 1 to 10 parts by weight, and in the above range, it is suitable for forming a fine electrode pattern.

In addition, the photoinitiator is a component for initiating the photoreaction as a specific example, 2,4-bistrichloromethyl-6-p-methoxystyryl-s-triazine, 2-p-methoxystyryl-4,6 Triazine-based compounds such as bistrichloromethyl-s-triazine, 2,4-trichloromethyl-6-triazine and 2,4-trichloromethyl-4-methylnaphthyl-6-triazine; Benzoin compounds such as benzophenone and p- (diethylamino) benzophenone; 2,2-dichloro-4-phenoxyacetophenone, 2,2-diethoxyacetophenone, 2,2-dibutoxyacetophenone, 2-hydroxy-2-methylpropiophenone, pt-butyltrichloroacetophenone Acetophenone series compounds, such as these; Xane, such as xanthone, thioxanthone, 2-methyl thioxanthone, 2-isobutyl thioxanthone, 2-dodecyl thioxanthone, 2,4-dimethyl thioxanthone, 2,4-diethyl thioxanthone Ton compound; Or 2,2-bis-2-chlorophenyl-4,5,4,5-tetraphenyl-2-1,2-bisimidazole, 2,2-bis (2,4,6-tricyanophenyl)- Imidazole compounds such as 4,4,5,5-tetraphenyl-1,2-bisimidazole and the like can be used.

The photoinitiator is preferably included 1 to 10 parts by weight of the photosensitive organic component. If the content is less than 1 part by weight, the degree of curing is lowered, and the low sensitivity makes it difficult to implement a normal pattern shape and is not good for the straightness of the pattern. If it exceeds 10 parts by weight, problems with storage stability may occur. Due to the degree of curing, the resolution may be lowered, and there is a problem in that a residual film is easily generated in portions other than the formed pattern.

In addition, the photosensitive organic component may further include a crosslinkable oligomer having a weight average molecular weight of 300 to 1000 in order to increase adhesion to the substrate and increase development margin. Preferably, the crosslinkable oligomer is preferably glycerin propoxylated triacrylate (GPTA), and the amount of the crosslinkable oligomer is preferably 0.1 to 10 parts by weight of the photosensitive organic component.

In addition, the photosensitive organic component may further include other commonly used additives.

D) the photosensitive organic component in the photosensitive paste for forming a PDP electrode that can be applied to the present invention is preferably included in 7 to 40 parts by weight. In the above range, it is possible to satisfy the stability, developability and workability of the paste at the same time.

In addition, e) the sintering aid used in the photosensitive paste for PDP electrode formation that can be applied to the present invention serves to help sinter the paste component. The sintering aid may be used as a sintering aid used in the conventional electrode forming paste, as a specific example, silver acetate and nitrocellulose may be used, in particular a sintering aid containing a silver component It is good to use. The sintering aid is preferably included in 0.1 to 5 parts by weight of the paste of the present invention. If it is in the above range it will exhibit an improvement in adhesion, sinterability and good electrical resistance. In addition, in the case of using nitrocellulose as an organic sintering aid, the rapid heating of nitrocellulose helps complete combustion of organic matter and helps sintering of metal powder.

In addition, the electrode-forming paste that can be applied to the present invention containing the above components may be a conventional additive such as colorants, dyes, dispersants, anti-scratching agents, plasticizers, adhesion promoters, speed enhancers, surfactants, etc. By further including in the range of 0.01 to 10 parts by weight, which is used as an additive, it is of course possible to improve the performance according to the characteristics of the individual process.

The photosensitive paste for forming a PDP electrode which can be applied to the present invention may be obtained by blending the above-mentioned essential components and optional components in a predetermined ratio and uniformly dispersing them with a kneader such as a blender or a triaxial roll.

In another aspect, the present invention provides a method for manufacturing a PDP using the photosensitive paste for forming a PDP electrode and a PDP manufactured through the method, the method of producing a PDP is transparent as shown in FIG. In the case of a PDP having no electrode, a) applying a photosensitive paste for forming a PDP electrode on the transparent substrate; b) exposing and developing a transparent substrate coated with the photosensitive paste for forming a PDP electrode to form a pattern; c) firing the transparent substrate on which the pattern is formed. In this way, the PDP manufacturing method of the present invention is a PDP electrode in which the black layer and the conductive layer of the PDP electrode are integrated to manufacture the PDP bus electrode by one coating (printing) or coating process.

The transparent substrate is a PDP top plate, and the paste may be coated with a conventional paste printing method or coating method. Preferably screen printing and table coating methods are preferred. Also, after the paste is applied onto the substrate, a series of electrode formations of drying, exposure, development, and firing may be applied with known processes used in forming PDP electrodes.

In particular, the PDP manufacturing method of the present invention uses a photolithography apparatus in order to form a PDP electrode through two processes by printing two separate pastes in order to form a black layer and a conductive layer. PDP electrode with black layer and conductive layer is formed to form electrode and simplifies process, and it can reduce PDP manufacturing cost significantly by reducing black pigment usage, and can greatly reduce defects caused by PDP manufacturing. There is an advantage.

In addition, in the manufacture of a PDP electrode having a transparent electrode as shown in Figure 5, a) forming a transparent electrode pattern for forming a scan electrode or a sustain electrode on a transparent substrate; b) applying a photosensitive paste for forming a PDP electrode of the substrate on a transparent substrate having the transparent electrode pattern formed thereon; c) exposing and developing a transparent substrate coated with the photosensitive paste for forming a PDP electrode to form a bus electrode pattern; d) firing the transparent substrate on which the bus electrode pattern is formed, thereby forming a scan electrode or a sustain electrode. The above-described effects can be obtained, and in this case, the transparent substrate can be obtained. Is a PDP top plate, and the coating may be a conventional paste printing and coating method, and the coating is preferably screen printing. In addition, a series of electrode formation of drying, exposure, development and firing after applying the paste on the substrate may be applied with known processes used in forming the PDP electrode.

Hereinafter, preferred examples are provided to help understanding of the present invention, but the following examples are merely to illustrate the present invention, and the scope of the present invention is not limited to the following examples.

EXAMPLE

Example 1

Methacrylic acid (MA): Benzyl acrylate (BA): 2-hydroxyethyl (meth) acrylate (2-HEMA): Methyl (meth) acrylate (MMA) using propylene glycol monomethyl ether as a solvent : 18 parts by weight of an acrylate resin (weight average molecular weight 25,000) prepared by polymerization at a weight ratio of 20: 10: 40, 8 parts by weight of 2-hydroxyethyl acrylate as a crosslinkable monomer monomer, 4 parts by weight of benzophenone as a photoinitiator Part. 60 parts by weight of a spherical silver powder having a particle size distribution of D ₁₀ = 0.43 μm, D ₅₀ = 1.48 μm, D ₉₀ = 1.98 μm and a tap density of 5 g / cm ³ , V ₂ O ₅ -P ₂ O ₅ -ZnO-BaO-Li ₂ O contains a molar percentage of 45: 30: 10: 5: 10, respectively, and the chromaticity (Minolta) is corrected using a standard white plate with blackness (color L *) (minolta) CR 30) and 30 as measured using 6 parts by weight of glass frit having a softening temperature (Ts) of 400 ° C., 3 parts by weight of a Cu-Cr based black pigment having an average particle size of 0.6 μm, 0.225 parts by weight of silver acetate and 0.1 parts by weight of a surfactant as a sintering aid. It was dispersed with a group to prepare a photosensitive paste for forming a PDP electrode.

Example 2

In the same manner as in Example 1 except that 52.5 parts by weight of silver (Ag) powder used in Example 1, 7.5 parts by weight of spherical aluminum powder having an average particle diameter of 2.0 μm was used as the metal powder in Example 1. A photosensitive paste for PDP electrode formation was prepared.

Example 3

A photosensitive paste for forming a PDP electrode was manufactured in the same manner as in Example 2, except that 54 parts by weight of silver powder and 6 parts by weight of spherical aluminum powder having an average particle diameter of 2.0 μm were used as the metal powder in Example 2.

Example 4

A photosensitive paste for forming a PDP electrode was prepared in the same manner as in Example 2, except that 52 parts by weight of silver powder and 8.5 parts by weight of aluminum powder were used in Example 2.

Comparative Example 1

A photosensitive paste for forming a PDP electrode was manufactured in the same manner as in Example 2, except that 50 parts by weight of silver powder and 10 parts by weight of aluminum powder were used in Example 2.

Comparative Example 2

A photosensitive paste for forming a PDP electrode was prepared in the same manner as in Example 2, except that 48 parts by weight of silver powder and 12 parts by weight of aluminum powder were used in Example 2.

Comparative Example 3

A photosensitive paste for forming a PDP electrode was manufactured in the same manner as in Example 2, except that 3 parts by weight of glass frit and 12 parts by weight of black pigment were used in Example 2.

Comparative Example 4

A photosensitive paste for forming a PDP electrode was manufactured in the same manner as in Example 2, except that 12 parts by weight of glass frit and 3 parts by weight of black pigment were used in Example 2.

Using the photosensitive paste for PDP electrode formation prepared in Examples 1 to 4 and Comparative Examples 1 to 4 to measure the electrical resistance, sinterability, and blackness are shown in Table 1 below.

Experimental method is printed on the glass substrate by the screen printing method to the electrode forming paste prepared in Examples 1 to 4 and Comparative Examples 1 to 4 with a thickness of 15 ㎛, then dried at 110 ℃ for 10 minutes in a drying furnace After that, the dried test piece was irradiated with UV at an exposure dose of 200 and 400 mJ / cm ² , respectively, developed with 4% by weight of Na ₂ CO ₃ aqueous solution, washed with pure water (DI water), and then a pattern was formed. The board | substrate was heated up to 580 degreeC at 10 degreeC / min, hold | maintained at 580 degreeC for 10 minutes, and baked to prepare the test piece. The electrical resistance was calculated through the film thickness and the resistance value of the prepared test piece, and the blackness (color L *) was used as a colorimeter (minolta CR 300) in which a plastic material was corrected using a standard white plate. The sinterability (please indicate the evaluation method evaluation criteria) was measured.

Resistivity (uΩcm) Sinterability Blackdo Example 1 10 Good 38 Example 2 10 Good 38 Example 3 10 Good 40 Example 4 15 Good 40 Comparative Example 1 40 Inadequate 50 Comparative Example 2 20 Inadequate 50 Comparative Example 3 50 Bad 35 Comparative Example 4 50 Good 55

As shown in Table 1, the photosensitive pastes for forming PDP electrodes of Examples 1 to 4 according to the present invention have good sinterability, resistivity of 15 uΩcm or less, and blackness of 42 or less, and the black layer of the PDP bus electrode. It was confirmed that the role of the conductive layer can be performed at the same time. In addition, in Examples 2 to 4, when the metal powder is mixed with silver (Ag) powder and aluminum powder, the use of expensive silver (Ag) powder is reduced, thereby significantly lowering the unit cost of the paste and in terms of electrical resistance, sinterability, and blackness. It was confirmed that the silver (Ag) powder only shows the same result.

However, when the amount of aluminum powder used in Comparative Examples 1 and 2 was too high, the sinterability and blackness were not good. In particular, the electrical resistance was too high to serve as a conductive layer, and the amount of the black pigment used in Comparative Example 3 was too high. In many cases, the blackness was good, but the sintering property was bad, and the electrical resistance was too high to serve as a conductive layer. When the amount of the glass frit of Comparative Example 4 was used too much, the electrical resistance was high and the blackness was too bad. It was difficult to play the role.

The plasma display panel and the method of manufacturing the same according to the present invention simplify the manufacturing process by forming the conventional black layer and the conductive layer into an integrated PDP electrode, and significantly reduce the PDP manufacturing cost by reducing the amount of the Ag electrode and the black pigment. In addition, it is possible to obtain an effect of greatly reducing defects caused by PDP manufacturing.

In addition, in the case of applying the paste composition, a PDP electrode may be formed using a photolithography apparatus without additional equipment increase, and the PDP manufacturing cost may be significantly reduced, and defects due to PDP manufacturing may be greatly reduced.

Claims (19)

A plasma display panel comprising an upper substrate on which a scan electrode and a sustain electrode are formed on a lower surface of a transparent substrate, and a lower substrate on which an address electrode and a partition are formed. And the scan electrode or sustain electrode is made of a layer of conductive black material having a maximum brightness (blackness) of 42 and a specific resistance of 15 uΩcm. The method of claim 1, And the scan electrode or sustain electrode further comprises a transparent electrode layer having a width equal to or greater than a width of the conductive black material layer between the conductive black material layer and the transparent substrate. The method according to claim 1 or 2, The brightness (blackness) measured by using a color difference meter of the conductive black material layer is a maximum plasma display panel of 40. The method according to claim 1 or 2, And a resistivity of the conductive black material layer is at most 10 uΩcm. The method according to claim 1 or 2, The conductive black material layer is a) 40 to 80 parts by weight of the metal powder for the electrode; b) 1 to 10 parts by weight of black glass frit; c) 1 to 10 parts by weight of black pigment; d) 7 to 40 parts by weight of the photosensitive organic component; e) 0.1 to 5 parts by weight of the sintering aid; Plasma display panel, characterized in that formed of a photosensitive paste for forming a PDP electrode. The method of claim 5, Wherein the black glass frit has a blackness (color L *) of 60 or less when measured using a colorimeter (minolta CR 300) corrected using a standard white plate. The method of claim 5, The black glass frit is a plasma display panel, characterized in that the V ₂ O ₅ -P ₂ O _{5 type} or CuO-MnO type black glass frit. The method of claim 5, The metal powder comprises 1.5 to 5 μm of aluminum powder and ii) a particle diameter of 0.05 to 5 μm of silver (Ag) powder in a weight ratio of 1: 6 to 1: 9. The method of claim 5, And said metal powder has a tap density of at least 5 g / cm ³ . The method of claim 8, The silver (Ag) powder is a plasma display panel, characterized in that the particle size of 0.05 to 0.2 ㎛ 0 to 1 parts by weight based on 100 parts by weight of the total silver (Ag) powder. The method of claim 5, The black pigment has a particle size of 0.5 to 1.0 ㎛ plasma display panel. The method of claim 5, And the black glass frit and the black pigment in a weight ratio of 1: 1.5 to 3: 1. The method of claim 5, The photosensitive organic component is Iii) 5 to 30 parts by weight of an organic binder; Ii) 1 to 10 parts by weight of the photopolymerizable monomer; And Iii) 1 to 10 parts by weight of photoinitiator; Plasma display panel comprising a. The method of claim 13, The organic binder is 20 to 70% by weight of unsaturated carboxylic acid; 10 to 40% by weight aromatic monomer; And 20 to 60% by weight of an acrylic monomer. The method of claim 5, Plasma display panel, characterized in that the sintering aid is silver acetate, nitrocellulose. a) applying a photosensitive paste for forming a PDP electrode according to claim 5 on a transparent substrate; b) exposing and developing a transparent substrate coated with the photosensitive paste for forming a PDP electrode to form a pattern; And, c) baking the transparent substrate on which the pattern is formed Method of manufacturing a plasma display panel comprising a. The method of claim 16, The coating is a method of manufacturing a plasma display panel, characterized in that the screen printing. a) forming a transparent electrode pattern for forming a scan electrode or a sustain electrode on the transparent substrate; b) applying a photosensitive paste for forming a PDP electrode according to claim 5 on a transparent substrate having the transparent electrode pattern formed thereon; c) exposing and developing a transparent substrate coated with the photosensitive paste for forming a PDP electrode to form a bus electrode pattern; And, d) baking the transparent substrate on which the bus electrode pattern is formed to form a scan electrode or a sustain electrode Method of manufacturing a plasma display panel comprising a. The method of claim 18, The coating is a method of manufacturing a plasma display panel, characterized in that the screen printing.

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