JP2002015676A - Plasma display panel and its back board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel of a structure not producing problems, when it is made to a panel and driven, while aiming at an improvement in brightness. SOLUTION: The plasma display panel is constituted of a compound electrode composing of a maintaining electrode and a bus electrode on a front board, an address electrode intersecting perpendicularly with the compound electrode and a vertical rib 12 arranged in standing state between the address electrodes on the back board, and further, a horizontal rib 13 formed for dividing a cell space 14 as a discharge space specified by the address electrode and the bus electrode, a phosphor arranged so at to cover wall sides of the vertical rib 12 and the horizontal rib 13 dividing the cell space, and a structure in which the edge of the vertical rib 12 are pressed down by the horizontal rib 13a. As a luminescence area of a fluorescent surface becomes large compared with a case where the horizontal rib 13 does not exist, high brightness is obtained, and risings of the end parts of the vertical rib causing noise generation at the time of driving, are not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a plasma display panel (hereinafter, referred to as a PDP), which is a self-luminous flat panel display using gas discharge.

[0002]

2. Description of the Related Art In general, a PDP has a structure in which a pair of electrodes arranged regularly on two opposing glass substrates are provided, and a gas mainly composed of Ne, Xe or the like is sealed between the electrodes. Then, a voltage is applied between these electrodes,
By generating a discharge in a minute cell around the electrode, each cell emits light to perform display. In order to display information, regularly arranged cells are selectively caused to emit light. There are two types of PDPs, a direct current type (DC type) in which the electrodes are exposed to the discharge space, and an alternating current type (AC type) in which the electrodes are covered with an insulating layer. And a refresh driving method and a memory driving method.

FIG. 1 shows a configuration example of an AC type PDP. This figure shows the front plate and the back plate separated from each other. As shown in the figure, two glass substrates 1 and 2 are arranged in parallel and opposed to each other, and both become the back plate. The ribs 3 provided on the glass substrate 2 in parallel with each other are held at regular intervals. On the back side of the glass substrate 1 serving as a front plate, composite electrodes composed of a sustain electrode 4 which is a transparent electrode and a bus electrode 5 which is a metal electrode are formed in parallel with each other, and a dielectric layer 6 is covered thereover. The protective layer 7 (MgO layer) is further formed thereon. On the front side of the glass substrate 2 serving as the back plate, address electrodes 8 are formed between the ribs 3 so as to be orthogonal to the composite electrodes and are formed in parallel with each other. Are formed, and a phosphor 10 is provided so as to cover the wall surface of the rib 3 and the cell bottom surface. In order to perform color display, one of the phosphor materials that emits light in each of the RGB colors is filled between the ribs 3, and the back plate has a large number of sets of three striped phosphor screens of each of the RGB colors. Structure.

The AC type PDP is of a surface discharge type, and has a structure in which, after writing is performed by an address electrode 8, an AC voltage is applied to a composite electrode on the front panel to discharge by an electric field generated in a space. In this case, since the alternating current is applied, the direction of the electric field changes according to the frequency. Then, the phosphor 10 emits light by the ultraviolet light generated by the discharge, so that an observer can visually recognize the light transmitted through the front plate.

[0005]

Generally, in PDPs, it is one of the important issues to increase the luminance when the phosphor screen emits light. Various methods have been proposed to increase the brightness, but there is no definitive solution, and the brightness is gradually increased by stacking a plurality of methods. As one of them, increasing the light emitting area of the phosphor screen is effective in that the luminous efficiency is improved due to the efficient operation of ultraviolet light on the phosphor screen and the luminance is increased. However, A of the above structure
In the C-type PDP, the phosphor 10 is provided so as to cover the wall surfaces of the ribs 3 on both sides and the cell bottom surface, and the phosphor surface is formed so as to extend over only three surfaces, so that the light emitting area is restricted. ing. In view of this, there has been proposed a configuration in which a horizontal rib (auxiliary partition) orthogonal to the vertical rib is provided so that four sides of the display cell portion are surrounded, and the light emitting area is increased.

As described above, when the horizontal ribs (auxiliary partition walls) are provided in addition to the vertical ribs for partitioning the display cell portion, the ends of the vertical ribs are outside the display area. No side ribs are required. Therefore, normally, the horizontal rib is not provided at the end of the vertical rib. However, if the ends of the vertical ribs are in a protruding shape, the ends of the vertical ribs bulge due to shrinkage during firing, so that when a panel is formed, a space is created between the front ribs and noise is generated when the panel is driven. Occurs. To prevent this, it is necessary to polish the ends of the vertical ribs after forming the ribs.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a PDP having a structure which does not cause a problem when it is driven in a panel while improving the luminance. It is in.

[0008]

In order to achieve the above object, a PDP of the present invention has a composite electrode comprising a sustain electrode and a bus electrode on a front panel and an address perpendicular to the composite electrode on a rear panel. It has an electrode and vertical ribs standing between the address electrodes, and further, on the back plate, horizontal ribs are formed to partition a cell space as a discharge space specified by the address electrodes and the bus electrodes, A phosphor is provided so as to cover the wall surfaces of the vertical ribs and the horizontal ribs that divide the cell space, and the cell bottom surface, and has a structure in which the ends of the vertical ribs are pressed by the horizontal ribs.

The back plate constituting the above PDP is
An address electrode orthogonal to a composite electrode composed of a sustain electrode and a bus electrode on the front panel and a vertical rib provided between the address electrodes and a vertical rib provided between the address electrodes, as a discharge space specified by the address electrode and the bus electrode on the front panel. A horizontal rib for partitioning the cell space is formed, and a phosphor is provided so as to cover the wall surface of the vertical rib and the horizontal rib that partition the cell space and the bottom of the cell. It becomes the thing of the structure which is held down.

[0010]

FIG. 2 is a perspective view showing an example of the shape of a rib formed on the back plate of the PDP according to the present invention.
FIG. 3 is a plan view showing a pattern of a rib top corresponding to FIG.

In FIG. 2, reference numeral 11 denotes a glass substrate constituting a back plate, on which vertical ribs 12 and horizontal ribs 13 are formed. In the figure, the address electrodes and the dielectric layers formed on the glass substrate 11 are omitted. Further, although a large number of vertical ribs 12 and horizontal ribs 13 are actually formed on the back plate, FIGS. 2 and 3 show only a part of the corners.

The vertical ribs 12 are formed between the address electrodes and in parallel with the address electrodes. The horizontal ribs 13 are formed so as to define a cell space 14 as a discharge space specified by the bus electrodes on the front panel and the address electrodes on the rear panel. That is, it has a matrix structure in which horizontal ribs 13 are provided orthogonally as auxiliary partition walls between the vertical ribs 12. In the illustrated back plate according to the present invention, the horizontal ribs 13 a are also formed at the ends of the vertical ribs 12. After the vertical ribs 12 and the horizontal ribs 13 are formed in such a shape, the phosphor is provided so as to cover the wall surfaces of the vertical ribs 12 and the horizontal ribs 13 and the cell bottom surface, thereby completing the rear plate.

As shown in FIG. 2 and FIG.
Is surrounded by the vertical ribs 12 and the horizontal ribs 13, so that the emission area of the phosphor screen in the cell space 14 is larger than that of the stripe structure without the horizontal ribs 13. Therefore, since the ultraviolet rays generated in the cell space 14 due to the discharge act on the phosphors on all sides, high luminance can be obtained. Further, the horizontal ribs 13 can reduce the discharge of the discharge in the cell space 14 and the leakage of the ultraviolet light generated by the discharge, and can independently control the light emission in the cell space 14, thereby obtaining a high quality display image. it can.

Since the ends of the vertical ribs 12 are not protruded but are held by the horizontal ribs 13a, there is no swelling due to shrinkage during firing when the ribs are formed. In other words, if the ends of the vertical ribs 12 are in a protruding shape, the ends of the vertical ribs will bulge due to shrinkage in the firing process, and the raised ends of the vertical ribs 12 will hit the front plate when panelized, leaving a gap. ,
By adopting a structure in which the ends of the vertical ribs 12 are pressed by the horizontal ribs 13a, such swelling can be eliminated.

FIG. 4 is a perspective view showing another example of the shape of the rib formed on the back plate of the PDP according to the present invention, and FIG. 5 is a plan view showing the pattern of the rib top corresponding to FIG. .

The back plate shown in FIG. 4 and FIG.
2, horizontal ribs 13 are provided as auxiliary partition walls. The horizontal ribs 13 have a step matrix structure lower than the vertical ribs 12. And in the illustrated back plate according to the present invention,
Horizontal ribs 13 a are also formed at the ends of the vertical ribs 12. This type is similar to the back plate shown in FIGS. 2 and 3 in that the light emission area of the phosphor screen is larger than that of the stripe structure, and the space above the horizontal ribs 13 takes into account the exhaust during paneling. Has become. Also in this type of back plate, the ends of the vertical ribs 12 are not protruded, but are held by the horizontal ribs 13a, so that the swelling due to firing shrinkage does not occur.

FIGS. 6 and 7 show the patterns of FIGS. 3 and 5, respectively, in which the longitudinal ribs 12a at both ends are thickened. Normally, vertical ribs are also formed outside the display area as dummy ribs. That is, the dummy ribs are provided for the purpose of reducing the influence of the bending of the glass substrate around the display area when the panel is formed. Also, when filling the phosphor paste by screen printing, it is also formed to have a margin in order to prevent the condition from being different at both ends of the display area due to the bending of the screen plate and to make the filling amount non-uniform. You. Alternatively, when ribs are formed by the sandblasting method, the ribs are sharply cut at both ends and the ribs become thinner. However, if a dummy rib is provided in a place that does not affect the display area, even if the dummy rib becomes thinner, it is not related to display. Dummy ribs are also formed in the sense that there is no gap. Therefore, in the examples shown in FIGS. 6 and 7, the outermost dummy ribs which are dummy ribs are made thicker. If the vertical ribs 12a at the ends are thin, undulations may occur due to shrinkage during firing, which may be recognized as defects in the inspection process. However, as shown in FIGS. 6 and 7, the vertical ribs 12a at the ends must be thickened. As a result, undulation during firing is eliminated.

Examples of the method for forming the rib include a sand blast method, a mold transfer method, and a photosensitive paste method.

In order to form ribs by the sand blast method,
First, a rib material layer is formed by applying and drying a rib paste on a substrate. Next, a photosensitive resin composition layer having sandblast resistance is provided on the rib material layer,
It is patterned into a blast mask for defining cells by photolithography. Then, after performing a sand blast process for removing unnecessary portions of the rib material layer by spraying mixed air containing abrasives from a spray nozzle above the blast mask, the blast mask is peeled off and then fired. Can be The blast mask may be formed by printing such as screen printing, a dispensing method, an electric field jet method, and offset printing. Alternatively, there is a method in which a rib paste is coated on a film in advance, then laminated on a substrate, and similarly subjected to sandblasting.

In the mold transfer method, a female mold having a concave portion corresponding to a target rib pattern is used. Then, after filling the rib paste into the concave portion of the female mold, the substrate is brought into close contact with the female mold so as to sandwich the rib paste, and the rib paste is cured in that state. Next, the female mold is peeled from the substrate such that the cured rib paste is left on the surface of the substrate. Subsequently, ribs are formed by baking the substrate to which the rib paste has been transferred in a pattern.

As the glass frit constituting the rib paste, one having a softening point of 400 to 600 ° C. and a coefficient of thermal expansion (α ₃₀₀ ) of 60 to 95 × 10 ⁻⁷ / ° C. is used. If a glass frit having a softening point exceeding 600 ° C. is used, it is necessary to raise the sintering temperature, and it is not preferable because a glass frit having a softening point lower than 400 ° C. Glass frit is fused before it is decomposed and volatilized, and voids and the like are generated in the layer, which is not preferable. On the other hand, if the coefficient of thermal expansion is out of the above range, the difference from the coefficient of thermal expansion of the glass substrate is large, and distortion or the like occurs, which is not preferable. A glass transition temperature of 350 to 500 ° C is used.

Specific examples of the glass frit of the rib paste include PbO—SiO ₂ —B ₂ O ₃ and Bi ₂
O ₃ -SiO ₂ -B ₂ O ₃ system, ZnO-B ₂ O ₃ -Si
O ₂ -alkali metal oxide, Bi ₂ O ₃ -ZnO-B
_{A 2} O ₃ system is exemplified. With these glass frits, the average particle size is 0.1 to 10 μm, preferably 0.5 to 5 μm
Is used.

In addition, an inorganic filler is added to the rib paste as an inorganic component in addition to the above-mentioned glass frit. Further, an inorganic pigment may be added.

The inorganic filler is intended to prevent casting during firing and to improve compactness, and has a higher softening point than glass frit. In the present invention, for example, titania, alumina, zirconia, silica, Tin, IT
O, ZnO, RuO and the like can be mentioned, and the above oxide doped with impurities such as antimony-doped tin oxide can be used. Among these, the average particle size is 0.01 to 5 μm,
Spherical, amorphous, massive, needle-like and rod-like shapes are used. The use ratio of the inorganic filler is preferably 5 to 50 parts by weight with respect to 100 parts by weight of the glass frit.

The inorganic pigment is added as necessary to reduce the reflection of external light and improve the practical contrast. When the color is dark, a fire-resistant black pigment such as Co- Cr-Fe, Co-Mn-Fe, Co-
Fe-Mn-Al, Co-Ni-Cr-Fe, Co-N
i-Mn-Cr-Fe, Co-Ni-Al-Cr-F
e, Co-Mn-Al-Cr-Fe-Si and the like. Examples of the fire-resistant white pigment include titanium oxide, aluminum oxide, silica, and calcium carbonate. The average particle size of the inorganic pigment used is preferably 0.01 to 5 μm.

As the resin component removed by firing,
Ethyl cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose derivatives such as nitrocellulose, polyacrylic esters, polyester resins such as alkyd resins, acrylic acid, methacrylic acid, itaconic acid, 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-hexyl 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, cyclosixyl methacrylate, cyclohexyl acrylate, glycylic 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 solvent include terpenes such as α-, β- and γ-terpineol, ethylene glycol monoalkyl ethers, ethylene glycol dialkyl ethers, diethylene glycol monoalkyl ethers, diethylene glycol dialkyl ethers, and ethylene glycol monoalkyl. Ether acetates, ethylene glycol dialkyl ether acetates, diethylene glycol monoalkyl ether acetates, diethylene glycol dialkyl ether acetates, propylene glycol monoalkyl ethers,
Examples include propylene glycol dialkyl ethers, propylene glycol monoalkyl ether acetates, propylene glycol dialkyl ether acetates, alcohols such as methanol, ethanol, isopropanol, 2-ethylhexanol, 1-butoxy-2-propanol, and the like. You may use individually or in mixture of 2 or more types.

Further, a plasticizer, an antisettling agent, a dispersant, an antifoaming agent, a dye, a silane coupling agent, a monomer initiator,
A sensitizer, an ultraviolet absorber and the like can be used as needed.

In the photosensitive paste method, a photosensitive rib paste is applied to a substrate, and a rib material layer is formed by drying. A rib material layer is formed by exposure through a photomask corresponding to the rib shape and subsequent development. This is a method in which a material layer is patterned and then fired. The photosensitive rib paste used in this method comprises at least an inorganic component having a glass frit and an organic component containing a photosensitive compound. Among these, the same glass frit as described above is used as the inorganic component.

The photosensitive organic component, which is the other component of the photosensitive rib paste, preferably accounts for 15 to 35% by weight of the photosensitive rib paste. Specifically, the photosensitive organic component is a) a photosensitive component selected from at least one of a photosensitive monomer, a photosensitive oligomer, and a photosensitive polymer; b) a binder, a photopolymerization initiator, Sensitizers, ultraviolet absorbers, polymerization inhibitors, plasticizers, thickeners, antioxidants, dispersants, c) other optional additives,
Consists of

Examples of the photosensitive monomer include compounds having an active carbon-carbon double bond, and monofunctional and polyfunctional compounds having a vinyl group, an allyl group, an acrylate group, a methacrylate group, or an acrylamide group as a functional group. Are preferred.

As a photosensitive organic component, it serves as a component for improving the physical properties of a cured product formed by photoreaction, adjusting the viscosity of the paste, and controlling the developability of an unexposed portion. , Oligomers or polymers.

When a binder component is required in the photosensitive rib paste, polyvinyl alcohol, polyvinyl butyral, a methacrylate polymer, an acrylate polymer, a copolymer thereof, or the like can be used as the binder.

When a photopolymerization initiator is used, the pattern formation using the photosensitive rib paste is performed by polymerizing and cross-linking the photosensitive components (monomer, oligomer, polymer) in the exposed portions to make them insoluble in a developer. Since the photosensitive functional group preferably used is radically polymerizable, it is preferable to select from those which generate radical species.

Further, a sensitizer is used together with a photopolymerization initiator,
It is also possible to improve the sensitivity (chemical sensitization) or expand the wavelength range effective for the reaction (spectral sensitization). There are various mechanisms of action of the sensitizer, but a so-called tripolymer sensitizer is most often used.

Further, the photosensitive rib paste contains an ultraviolet absorber, which is effective for processing a pattern having an excellent shape. By adding a compound having a high ultraviolet light absorbing effect, a particularly high aspect ratio, high definition, and high resolution can be obtained. As the ultraviolet absorber, those composed of organic dyes, among them, those having a high absorption coefficient in the wavelength range of 350 to 450 nm are preferably used.

The photosensitive rib paste may further contain, as necessary, a polymerization inhibitor for improving thermal stability during storage, an antioxidant for preventing oxidation of the acrylic copolymer, and other plasticizers. And the like.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to a series of steps for forming ribs by a sandblast method.

Example 1 Here, a back plate having a matrix-structured rib shown in FIG. 2 was prepared, and a panel was formed using the back plate.

First, the plane size is 1000 × 600.
A glass substrate having a thickness of 2.8 mm and a thickness of 2.8 mm was prepared, and a large number of parallel stripe-shaped address electrodes having a line width of 100 μm and a pitch of 0.27 mm were formed on one surface thereof by screen printing. Next, a 7 μm-thick dielectric layer was formed over the entire surface so as to cover the electrode.

On this dielectric layer, a rib paste A having the following composition was coated at once by a die coater,
For 30 minutes to form a 170 μm-thick rib material layer. The glass frit used in Example 1 was
PbO / SiO ₂ / B ₂ O ₃ (alkali-free) as a main component, average particle size: 1.3 μm, glass transition point: 4
50 ° C., softening point: 560 ° C., coefficient of thermal expansion: 75 × 10 ⁻⁷
/ ° C, and the rib paste was prepared by kneading the following components with three rolls.

<Composition of rib paste A> ・ 60 parts by weight of glass frit ・ 12 parts by weight of titania ・ 8 parts by weight of alumina (“RA-40” manufactured by Iwatani Chemical Industry Co., Ltd.) ・ Resin (“Ethocel” manufactured by Dow Chemical Company) STD-100 FP ") 2 parts by weight ・ Diethylene glycol monobutyl ether acetate 9 parts by weight ・ Terpineol (solvent) 9 parts by weight

Next, the substrate was heated to 80 ° C., and a dry film (“OSBR film BF-605” manufactured by Tokyo Ohka Kogyo Co., Ltd.) was laminated on the entire surface of the rib material layer. Exposure and subsequent development were performed to form a patterned resist layer as a sandblast mask on the rib material layer. For exposure, a parallel light exposure machine using a high-pressure mercury lamp as a light source was used, and irradiation was performed under the conditions of 80 mJ / cm ² . For development, a 0.2% aqueous solution of sodium carbonate was used, and spray development was performed at a liquid temperature of 35 ° C. The sandblast mask of the present example had a pattern corresponding to the rib shown in FIG.

Next, in order to perform sand blasting, the substrate was moved on a number of transport rollers and was carried into the blasting chamber. Then, the abrasive was sprayed from the spray nozzle toward the rib material layer and the sandblast mask side of the workpiece in which the rib material layer and the sandblast mask were formed on the surface of the substrate, that is, the glass substrate. In this embodiment,
Fused alumina having an average particle size of 11.5 μm (“WA # 1000” manufactured by Fujimi Incorporated) was used as the abrasive.

In the blasting chamber, eight spray nozzles of a type which reciprocate in a direction perpendicular to the direction of transport of the substrate are provided. For each injection nozzle, 150mm x 0.5
A slit nozzle for injecting the abrasive almost vertically from the slit of mm is adopted. The slit nozzle itself has a wider spray distribution than the conventional round nozzle (10 mmφ), but the driving speed of the spray nozzle is increased to further improve the processing uniformity. In the blasting chamber, an abrasive was sprayed together with the compressed air on the side of the glass substrate on the side of the sand blast mask and the rib forming layer, and the rib material layer other than immediately below the sand blast mask was ground and removed.

Next, using a 0.7% aqueous solution of sodium hydroxide, the sandblast mask was peeled off at a liquid temperature of 30 ° C.
After drying, firing was performed at a peak temperature of 570 ° C., a holding time of 10 minutes, and a total firing time of 2 hours.

Thus, the ribs having the matrix structure were formed. The vertical rib has a top width of 50 μm and a bottom width of 9 μm.
0 μm, height 120 μm, horizontal ribs, top width 400 μm, bottom width 500 μm, same height 120 μm
m. When ribs were formed with this pattern, no noticeable bulge occurred at the ends of the vertical ribs because the ends of the vertical ribs were pressed by the horizontal ribs.

After the ribs were formed, the cell space was filled with the phosphor paste using a screen printer. Specifically, a paste containing a phosphor of green emission color (phosphor: “P1-G1S” 35 manufactured by Kasei Optonics, Inc.)
wt%, resin solid content 6.8wt%, solvent 58.2wt
%) Into a predetermined cell space and dried at 120 ° C. for 30 minutes. Similarly, a paste containing a phosphor of blue emission color (phosphor: “KX-501A” 2 manufactured by Kasei Optonics, Inc.)
7wt%, resin solid content 7.8wt%, solvent 65.2wt
%), A paste containing a phosphor of red emission color (phosphor:
35% by weight of “KX-504A” manufactured by Kasei Optonics,
Resin solids content 4.1 wt%, solvent 57.9 wt%) were each filled in predetermined rib spaces and dried similarly. After the phosphor paste filling step was performed in this manner, a firing step was finally performed to form a phosphor screen in the cell space.

A surface discharge type AC color PDP in which three primary colors of RGB can be visually recognized was prepared by attaching a separately prepared front plate to the back plate having the fluorescent screen formed in the cell space as described above. When this panel was formed, no gap was formed between the ribs on the back plate and the front plate. And
When the PDP thus manufactured was driven, the brightness was improved and no noise was generated.

Example 2 In this example, a back plate having ribs having a step matrix structure shown in FIG. 4 was prepared, and a panel was formed using the back plate.

First, the plane size is 1000 × 600.
A glass substrate having a thickness of 2.8 mm and a thickness of 2.8 mm was prepared, and a large number of parallel stripe-shaped address electrodes having a line width of 100 μm and a pitch of 0.27 mm were formed on one surface thereof by screen printing. Next, a 7 μm-thick dielectric layer was formed over the entire surface so as to cover the electrode.

On this dielectric layer, a rib paste B having the following composition was coated at once by a die coater,
For 30 minutes to form a 170 μm-thick rib material layer. The glass frit used in Example 2 was
ZnO, B 2 O 3, SiO, alkaline earth metal oxide,
It contains an alkali metal oxide and has a glass transition point of 46.
0 ° C., softening point: 556 ° C., coefficient of thermal expansion 80 × 10 ⁻⁷ / ° C.
The rib paste was prepared by kneading the following components with three rolls.

<Composition of the rib paste B> 100 parts by weight of glass frit 15 parts by weight of alumina ("Taimicron TM-DAR" manufactured by Daimei Chemical Co., Ltd.) 3 parts by weight of ethyl cellulose 15 parts by weight of terpineol 15 parts by weight of butyl carbitol acetate 15 Parts by weight

Next, a blast mask material having the following composition is patterned on the rib material layer by screen printing.
It penetrated into the upper part of the rib material layer. The screen printing plate used is 400 mesh of SUS and the opening width is 470 μm.
m, a horizontal stripe with a pitch of 1.08 mm.

<Composition of blast mask material>-75 parts by weight of polybutene 30N-3 parts by weight of plasticizer (dioctyl phthalate / dioctyl adipate)-1 part by weight of silica-0.5 parts by weight of defoamer (dimethyl silicone oil)-glass 15 parts by weight of frit (A) ・ 5 parts by weight of alumina (“Taimicron TM-DAR” manufactured by Daimei Chemical Co., Ltd.)

Next, the substrate was heated to 80 ° C., and a dry film (“Audil BF703” manufactured by Tokyo Ohka Kogyo Co., Ltd.) was laminated on the rib material layer. Exposure and subsequent development were performed to form a patterned resist layer as a sandblast mask on the rib material layer. For exposure, use a parallel light printer that uses a high-pressure mercury lamp as a light source.
Exposure was performed via a vertical stripe pattern mask having a line width of 80 μm and a pitch of 0.36 mm. Exposure conditions are
When measured at 365 μm, the intensity was 200 μW / cm ² and the irradiation amount was 80 mJ / cm ² . For development, a 0.2% aqueous solution of sodium carbonate was used, and spray development was performed at a liquid temperature of 35 ° C.

Subsequently, in order to perform sandblasting,
The substrate was moved over a number of rollers and carried into the blasting chamber. Then, the abrasive was sprayed from the spray nozzle toward the sandblast mask side of the substrate. In this example, sandblasting was performed at an injection pressure of 1 kg / cm ² using fused alumina (“Fused Alumina A- # 800” manufactured by Fujimi Incorporated) as an abrasive.

After sand blasting, the sand blast mask was peeled off at a liquid temperature of 35 ° C. using a 0.7% aqueous solution of sodium hydroxide, dried, and then subjected to a peak temperature of 575 ° C.
The firing was performed for a holding time of 10 minutes and a total firing time of 2 hours.

Thus, a rib having a step matrix structure was formed. The vertical rib has a top width of 50 μm, a bottom width of 90 μm, and a height of 120 μm, and the horizontal rib has a top width of 400 μm, a bottom width of 500 μm, and a height of 90 μm.
Met. Even when the ribs were formed in this pattern, no noticeable bulge occurred at the ends of the vertical ribs because the ends of the vertical ribs were pressed by the horizontal ribs.

After the ribs have been formed, the phosphor paste is filled in the cell space by a screen printer in the same manner as in the first embodiment, and finally a phosphor screen is formed in the cell space through a firing process. did.

A surface discharge type AC color PDP in which three primary colors of RGB can be visually recognized was prepared by attaching a separately prepared front plate to the back plate having the phosphor screen formed in the cell space as described above. When this panel was formed, no gap was formed between the ribs on the back plate and the front plate. And
When the PDP thus manufactured was driven, the brightness was improved and no noise was generated.

[0062]

As described above, the PDP of the present invention
Has a composite electrode composed of a sustain electrode and a bus electrode on the front panel, and has an address electrode orthogonal to the composite electrode on the rear panel and a vertical rib erected between the address electrodes, and further has a rear panel. A horizontal rib for defining a cell space as a discharge space specified by the address electrode and the bus electrode is formed, and covers a wall surface of a vertical rib and a horizontal rib for partitioning the cell space and a cell bottom surface. Since the phosphor is provided and the structure is such that the ends of the vertical ribs are held down by the horizontal ribs, the light emitting area of the phosphor screen is large as compared with the case where the horizontal ribs are not present. Luminance is obtained, and there is no swelling at the ends of the vertical ribs, which causes noise during driving.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a plasma display panel in which a front plate and a back plate are separated from each other.

FIG. 2 is a perspective view showing an example of a shape of a rib formed on a back plate of the plasma display panel according to the present invention.

FIG. 3 is a plan view showing a pattern of a rib top corresponding to FIG. 2;

FIG. 4 is a perspective view showing another example of the shape of the rib formed on the back plate of the plasma display panel according to the present invention.

FIG. 5 is a plan view showing a pattern of a rib top corresponding to FIG. 4;

FIG. 6 is a plan view showing a modified pattern of the pattern shown in FIG.

FIG. 7 is a plan view showing a modified pattern of the pattern shown in FIG.

[Explanation of symbols]

 1, 2 glass substrate 3 rib 4 sustain electrode 5 bus electrode 6 dielectric tank 7 protection tank 8 address electrode 9 dielectric tank 10 phosphor 11 glass substrate 12, 12a vertical rib 13, 13a horizontal rib 14 cell space

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 28, 2000 (2006.2.
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction contents]

On this dielectric layer, a rib paste B having the following composition was coated at once by a die coater,
For 30 minutes to form a 170 μm-thick rib material layer. The glass frit used in Example 2 was
It contains ZnO, B ₂ O ₃ , SiO ₂ , alkaline earth metal oxide and alkali metal oxide, and has a glass transition point of:
460 ° C, softening point: 556 ° C, coefficient of thermal expansion 80 × 10 ^-7
/ ° C, and the rib paste was prepared by kneading the following components with three rolls.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yozo Kosaka 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. (reference) 5C040 FA01 GA03 GF03 GF19 MA02 MA23

Claims (4)

[Claims] 1. A front panel comprising a composite electrode comprising a sustain electrode and a bus electrode, and a rear panel comprising an address electrode orthogonal to the composite electrode and a vertical rib provided between the address electrodes. On the back plate, horizontal ribs for defining a cell space as a discharge space specified by the address electrode and the bus electrode are formed, and cover the wall surfaces of the vertical ribs and the horizontal ribs for partitioning the cell space and the cell bottom surface. A plasma display panel having a structure in which a phosphor is provided as described above and the ends of the vertical ribs are pressed by horizontal ribs. 2. The plasma display panel according to claim 1, wherein the horizontal rib is lower than the vertical rib. 3. An address electrode orthogonal to a composite electrode composed of a sustain electrode and a bus electrode on the front panel, and a vertical rib standing between the address electrodes, and is specified by the address electrode and the bus electrode on the front panel. A horizontal rib for partitioning a cell space as a discharge space to be formed is formed, and a phosphor is provided so as to cover a wall surface of the vertical rib and the horizontal rib for partitioning the cell space and a cell bottom surface. The rear plate of the plasma display panel, characterized in that the end of the plasma display panel is held down by a horizontal rib. 4. The back plate of claim 3, wherein the horizontal ribs are lower than the vertical ribs.