JP2004241379A - Plasma display member and plasma display, as well as manufacturing method of plasma display member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a plasma display member and a plasma display with high precision and high light-emitting efficiency at low cost. <P>SOLUTION: Provided is the plasma display member and the manufacturing method of the same comprising a plurality of electrodes, separation walls, and phosphor, of which, a part of the electrodes is arranged on a surface of and/or inside the separatin walls. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a plasma display member and a method for manufacturing a plasma display member.

  2. Description of the Related Art Plasma display panels (hereinafter, referred to as “PDPs”) are used in fields such as OA equipment and public information display devices because they can perform high-speed display and can be easily made larger than liquid crystal panels. . In addition, progress to high-definition television and home theater applications is highly expected.

  The PDP generates a plasma discharge between an anode and a cathode facing each other in a discharge space provided between a front substrate and a rear substrate, and emits ultraviolet rays generated from a discharge gas sealed in the discharge space. The display is performed by irradiating a phosphor provided in the discharge space. When a mixed gas of Xe and Ne is used as the discharge gas, ultraviolet rays having a very short wavelength such as 147 nm and 172 nm are generated. Further, partition walls (also referred to as barriers or ribs) are provided in order to suppress the spread of the discharge to a certain area, perform display in a specified cell, and secure a uniform discharge space. The shape of the partition wall generally has a stripe shape or a lattice shape having a width of about 20 to 120 μm and a height of about 50 to 250 μm.

  An AC type PDP generally has a structure as shown in FIG. That is, a transparent electrode, a bus electrode, a transparent dielectric layer, and a protective film are formed on the front substrate. One transparent electrode and the bus electrode are laminated and electrically connected. By applying a voltage to the one transparent electrode and the bus electrode (scan electrode) and the adjacent transparent electrode and bus electrode (sustain electrode), a discharge is started from a (discharge) gap between these transparent electrodes. In addition, the display light emission operation is performed while the surface discharge on the surface of the protective film is maintained. Also, due to the definition and the interference of discharge with adjacent cells, the distance between the discharge electrodes cannot be made too large, so that the discharge is likely to occur in a very small area. Is not generated, the discharge mode is limited by negative glow, and the ultraviolet ray generation efficiency is low, that is, the luminous efficiency tends to be low. In particular, in a high-definition PDP such as a high-vision application, the distance between the discharge site, the partition wall, and the phosphor becomes relatively short, and charged particles such as ions and electrons are easily diffused, so that the discharge is more likely to shrink. Furthermore, since the discharge mode is a surface discharge, the generated ultraviolet light is also radiated toward the front substrate where no phosphor is formed, and most of the ultraviolet light is absorbed by the front substrate and used for display. Not.

The front substrate also needs a charge storage function at the time of address selection of a display pixel and a transmission function of phosphor emission. Therefore, a transparent dielectric layer having a thickness of 20 to 50 μm is formed. The visible light transmittance of the dielectric layer is about 70 to 80%, a part of visible light emitted from the phosphor is absorbed, and not all of the visible light is used as a display, resulting in loss. In addition, from the viewpoint of light transmission, the transparent electrode (such as ITO) is not always satisfactory. Further, since the discharge region is limited to the vicinity of the transparent electrode, it has been difficult to efficiently generate ultraviolet rays.
Further, the front-side substrate has many manufacturing processes, which causes a decrease in yield and an increase in cost.
As described above, the main problems of the PDP are high luminous efficiency and low cost.

  In order to improve luminous efficiency, for example, a technique using a metal partition has been proposed (see Patent Document 1 or 2). This is because the discharge path is lengthened by making it a counter discharge, and the partition is formed by stacking one or a plurality of insulated sheet metal plates, thereby suppressing the partition diffusion of charged particles during the formation of the positive column. This is to increase the discharge efficiency. However, not only the structure becomes more complicated, but also the front-side substrate, the rear-side substrate, and the metal partition have a three-layer structure, and the number of members and the number of manufacturing processes are increased.

  Another PDP using a thick-film ceramic sheet has been proposed (for example, Non-Patent Document 1). This is a three-layer structure in which a portion corresponding to a partition is formed into a lattice-shaped thick film ceramic sheet, and a thick plate ceramic sheet is sandwiched between a back plate and a front plate on which phosphors are formed. A display electrode and an address electrode are formed in a thick-film ceramic sheet, and a counter discharge is performed to improve luminous efficiency. However, a large screen (around 300 type) with a pixel size of about 3 mm is aimed at, and it is difficult to increase the definition of a thick ceramic sheet due to the process. In addition, precision is required for positioning the rear substrate, the thick film ceramic sheet, and the front substrate, resulting in a decrease in yield and an increase in cost. Furthermore, since the electrode gap (= discharge gap) is long, the discharge starting voltage increases, and a higher breakdown voltage IC is required, which increases the cost of the drive circuit.

That is, it is difficult to satisfy all of high definition, high luminous efficiency, and low cost in the PDP having the conventional structure which is currently commercialized and the PDPs which have been proposed so far.
JP-A-11-310470 (pages 5 to 9) JP-A-2000-306516 (pages 5 to 8) LCD / PDP International 2002, PDP Seminar 2002 (PDP Future Technology), Text 2-1 to 2-13

  Therefore, the present invention is directed to manufacturing and providing a PDP member and a PDP with high definition and high luminous efficiency at low cost, focusing on the problems of the above-described conventional technology.

In order to solve the above-mentioned problems, the present invention has the following configurations. That is, the present invention relates to a plasma display member having a plurality of electrodes, partition walls, and phosphors, wherein a part of the electrodes is arranged on the surface and / or inside of the partition wall. It is a display.
Further, the plasma display member and the plasma display are characterized in that the electrode has a main electrode and an auxiliary electrode projecting from the main electrode in a direction facing each other.
Further, the present invention provides a method for manufacturing a plasma display member having a plurality of electrodes, partition walls, and phosphors, the method including a step of disposing electrodes on the surface and / or inside the partition wall. is there.

  According to the present invention, it is possible to provide a PDP member and a method of manufacturing a PDP which have high luminous efficiency and low cost.

  The present inventors have conducted intensive studies on the panel structure of a plasma display member capable of increasing the luminous efficiency and reducing the cost of the plasma display, and as a result, the structure is significantly different from the structure of the conventional front plate and back plate. It has been found that this is achieved by the novel structure described.

  A plasma display (PDP) member of the present invention is a PDP member having a plurality of electrodes, partition walls, and phosphors, wherein some of the electrodes are arranged on the surface and / or inside the partition walls. It is important that the member is a PDP member. FIG. 3 shows a structural example of the PDP member of the present invention (phosphor is omitted). In this drawing, the case where the electrode is formed inside the partition is shown, but the electrode may be formed on the side surface, the top or the like of the partition. When the electrode is formed on the side surface or the top of the partition wall, it is preferable to cover the electrode surface with an insulating material when driving by the AC method, and to drive by the DC method from the viewpoint of avoiding dielectric breakdown and stability of discharge. In this case, it is better to insert a resistor for limiting the current.

  As described above, the PDP and the PDP member of the present invention have the same structure as the conventional PDP shown in FIG. 1, that is, a three-surface discharge type structure including a front plate on which display electrodes are formed and a rear plate on which partition walls are formed. Is a new structure in which a display electrode is formed on the surface and / or inside of the partition.

  The electrode formed on the surface and / or inside of the partition wall can be used as a display (sustain) electrode, and can also be used as a priming electrode and an address electrode for pilot discharge. The case where an electrode formed on the surface and / or inside the partition is used as a display (sustain) electrode will be described below. However, the present invention is not limited to this.

  The PDP of the present invention is not of the surface discharge type but of the opposed discharge type. Therefore, the gap between the electrodes can be increased as compared with the surface discharge type, and the discharge path can be lengthened. That is, the generation probability of the positive column is increased, and the efficiency of generating ultraviolet light and the efficiency of emitting light can be increased. Further, most of the conventional counter discharge type PDPs are counter discharges between the front substrate and the rear substrate, and in order to increase the discharge path length (= gap between electrodes), it is necessary to form a higher partition wall. The aspect ratio became large and it was not realistic in terms of processing accuracy and yield. In addition, when addressing is performed by facing discharge between the front substrate and the rear substrate, the gap between the electrodes becomes too long, the address voltage becomes high, and a high breakdown voltage IC is required. Therefore, the gap between the electrodes in the opposed discharge type was about 100 to 150 μm.

  The gap between the electrodes in the structure of the present invention can be substantially equal to the interval between the discharge cells. For example, it is about 0.5 mm for a 42-inch VGA class and about 0.3 mm for an XGA class. Therefore, the gap between the electrodes can be made two to three times or more longer than that of the conventional opposed discharge type without making the partition wall high. In addition, the gap between the electrodes is about 3 to 5 times that of the conventional surface discharge type. That is, the mode of discharge becomes closer to the positive column, and the efficiency of generating ultraviolet light can be increased, that is, the emission efficiency can be increased. Further, since the opposing discharge is caused, the loss of ultraviolet rays to the front substrate and the loss of charged particles to the partition walls are reduced, so that the luminous efficiency is increased from such a viewpoint.

  Also, in the conventional opposed discharge type between the front substrate and the rear substrate, the electrode gap, partition height, and discharge space volume could not be independently changed, but in the structure of the present invention, the electrode gap was reduced. The discharge space can be widened by increasing the height of the partition walls while keeping the height constant.Therefore, without changing the firing voltage, the degree of freedom in cell design to increase the UV generation efficiency and reduce the diffusion loss of charged particles is increased. Increase.

  Further, since it is not necessary to form an electrode on the front substrate, a transparent dielectric layer and a transparent electrode layer are not required, and the phosphor emission, which has been lost by 20 to 30%, can be effectively used as display light. Furthermore, since these do not need to be formed, the number of steps for forming the front substrate can be greatly reduced. Further, the bus electrode is not required on the front substrate, so that the aperture ratio of one pixel can be increased. Further, the light emitted from the phosphor irradiated on the bus electrode has been mostly absorbed so far, and the display has not been used. However, since the display can be used effectively, the brightness can be increased.

  Ultimately, a glass substrate alone is possible as the front substrate of the present invention, but a protective film (for example, an MgO film) is formed on the glass substrate for the purpose of improving the sputter resistance of the glass substrate surface, A black stripe or a black matrix may be formed for the purpose of improving the bright room contrast. Further, for the purpose of improving the address voltage and margin of the display cell, an address electrode can be formed on the front surface side.

  Further, it is easy to provide functions which are difficult to produce by the structure and the production process on the front side substrate, and the degree of freedom in materials and processes is widened. For example, there is a method of forming an ultraviolet reflective layer that more effectively utilizes ultraviolet rays generated by electric discharge, and a method of forming an optical thin film layer for facilitating extraction of light emitted from a phosphor out of a panel. Until now, when a transparent dielectric layer was formed, it was not determined by optical factors such as its thickness or refractive index, but rather from an electrical viewpoint such as dielectric strength and dielectric constant, as well as firing temperature and thermal softening characteristics. It was determined in balance with processability. However, in the present invention, since these restrictions are eliminated, material design becomes possible in terms of the refractive index and the optical film thickness.

  Further, since a high-temperature process such as baking or vapor deposition for forming the front substrate is not required, it is possible to reduce the thickness of the substrate such as glass to be used, and it is also possible to reduce the weight of the panel.

  In addition, when a complicated structure such as a lattice shape, a waffle structure, and a meander structure was adopted as the partition shape, a stage and a CCD camera with high positional accuracy were mounted in the sealing and bonding process of the front substrate and the rear substrate. Equipment is required. This is because the electrodes formed on the front substrate are formed on a substrate separate from the partition walls. Further, a processing error in the final step of paneling leads to a very large production loss, which hinders cost reduction. In the PDP member of the present invention, it is preferable that a partition and an electrode disposed on the surface and / or inside of the partition are formed on one substrate. More preferably, it is preferable to form an address electrode, a partition, an electrode and a phosphor disposed on the surface and / or inside the partition on the substrate. Because, even in the case of a complicated cell structure, the electrodes and the partition are formed on one substrate, so that the yield in the sealing and bonding steps can be improved. Further, since high bonding accuracy is not required, the bonding step can be performed using a simple and low-cost apparatus. In addition, since a main pattern can be formed on one substrate, uniformity of pixels, that is, discharge cells is increased, and a difference in a discharge starting voltage, an address voltage, and the like depending on a location in a large substrate is hardly generated. As a result, there are advantages that the voltage setting can be set lower and the reliability is improved.

  In the PDP member of the present invention, it is preferable that the electrode has a main electrode and an auxiliary electrode projecting from the main electrode in a direction facing each other. This makes it possible to lower the discharge starting voltage and perform stable discharge. The discharge start voltage is determined by Paschen's law (Vf = f (pd), Vf: discharge start voltage, p: discharge gas pressure, d: distance between electrodes). Vf shows a minimum with respect to the product of p · d. When the electrodes are arranged on the surface and / or inside of the partition wall, as described above, the distance between the electrodes is longer than in the case of the surface discharge, and the firing voltage is increased. For example, as shown in FIG. By providing the auxiliary electrodes projecting in the directions facing each other, the discharge starting voltage can be reduced. This is because, by providing the auxiliary electrode, the distance can be partially reduced in the interval between the display electrodes, so that a discharge easily occurs in the gap (discharge gap) between the auxiliary electrodes, and this is used as a trigger to generate a discharge with a wide interval between the main electrodes. Connect.

  The gap between the auxiliary electrodes is preferably 50 to 800 μm from the viewpoint of the effect of reducing the firing voltage and the stability of the discharge. More preferably, it is 60 to 300 μm. Even more preferably, it is 70 to 150 μm. If the gap between the auxiliary electrodes is smaller than 50 μm, dielectric breakdown in the gap between the electrodes is likely to occur. On the other hand, if it is larger than 800 μm, it is difficult to obtain the effect of reducing the firing voltage.

  The gap between the main electrodes depends on the size of the discharge cell to be formed, but is preferably 100 to 1000 μm. More preferably, it is 150 to 650 μm. If it is smaller than 100 μm, the discharge space becomes too narrow and stable discharge cannot be performed. If it is larger than 1000 μm, the discharge starting voltage becomes too large for practical use.

  FIG. 4 shows an auxiliary electrode having a simple slit structure, but may be tapered to one side. That is, erroneous discharge of an adjacent non-discharge cell (non-display cell) can be suppressed by tapering the adjacent discharge cell side. Further, a parallel slit shape is preferable from the viewpoint of uniformity of the processing accuracy of the interval between the electrodes.

  In the case of an AC type PDP, it is necessary to cover the electrode with an insulating material. However, when an auxiliary electrode is provided, the auxiliary electrode is buried inside the partition like the main electrode or formed on the surface of the partition. Then, it is preferable to coat later with an insulating material. When arranging the auxiliary electrode and the main electrode on the surface and / or inside of the partition, the partition shape is preferably not a stripe shape but a lattice shape and a waffle shape. More preferably, it is a grid-like partition. This is because most of the auxiliary electrode is formed on the surface and / or inside the partition (main partition) that partitions the pixels in the horizontal direction, and on the surface and / or inside the partition (auxiliary partition) for partitioning the pixels in the vertical direction. This is because it is sufficient to form most of the main electrode. Here, most means 50% or more of the electrode.

  FIGS. 3 and 4 show the case where the cross section of the main electrode and the auxiliary electrode is longer in the width direction than in the height (thickness) direction (FIG. 5). As shown in FIG. 6, it is preferable to use an electrode whose cross section is longer in the height (thickness) direction than in the width direction.

Except for the “ALIS” type PDP, in the case of other AC type PDPs, vertical (discharge) cells and non-discharge (non-display) cells are alternately arranged. If the electrode interval between the discharge cell and the non-discharge cell is the same, both cells are discharged. Therefore, the interval between the transparent electrodes of the discharge cells is made shorter than that of the adjacent non-discharge cells. Similarly, in the PDP of the present invention, the structure is such that only the display cells are discharged and the adjacent cells in the vertical direction are not discharged by making the respective electrode intervals different between the discharge (display) cell and the non-discharge (non-display). It can be.
In addition, when the auxiliary electrode is provided, the interference between discharges in adjacent cells can be reduced, so that the difference in electrode spacing between discharge (display) cells and non-discharge (non-display) cells can be reduced, that is, discharge (display) cells can be enlarged. . Therefore, the aperture ratio per pixel is increased, and high luminance can be achieved.

  The electrodes are preferably provided only on the inside and one side of the partition. The one side surface refers to a surface facing a discharge space for discharging (displaying), and is a surface other than the top and bottom of the partition. For example, it can be as shown in FIG. This is because discharge interference with adjacent non-discharge (non-display) cells can be suppressed, and the discharge start voltage can be reduced. The electrode on one side may be either the main electrode, the auxiliary electrode pair, or both. From the viewpoint of reducing the firing voltage, a part of the auxiliary electrode is preferably formed on one side.

Further, it is preferable that the partition wall is composed of two or more layers having different reflectances. The layer having a high reflectivity can increase the luminous efficiency by reflecting visible light generated from the phosphor leaked to the inside of the partition wall or the back substrate side to the display surface side and effectively utilizing the visible light. Here, the reflectance refers to the reflectance of all light rays (straight line segments + diffusion components) in the visible region.
The greater the difference in reflectance, the better, but it is preferably 40% or more. It is more preferably at least 50%. Even more preferably, it is 60% or more. For example, the upper layer has a reflectance of 5%, and the lower layer has a reflectance of 60% (the difference in reflectance is 55%).

  It is preferable that a layer having a low reflectance is provided on the display surface side. The presence of the layer having a low reflectance can absorb external light incident from the display surface side and improve the contrast. Further, the anti-reflection filter for external light can be changed to a filter having a high visible light transmittance, so that luminous efficiency can be improved.

  It is preferable that a part or all of the display electrode pair inside the display pixel is covered with glass having a glass softening point of 400 to 650 ° C (glass having a low softening point). By using glass at 400 to 650 ° C., the electrode can be covered with a layer having high density and few bubbles. Thereby, dielectric breakdown can be reduced and stable discharge can be performed. If the glass softening point is lower than 400 ° C., the glass is softened before the decomposition of the organic matter, which is a factor for forming bubbles. If it is higher than 650 ° C., sintering tends to be insufficient, and dielectric breakdown tends to occur.

For example, PbO-B ₂ O ₃ based low-softening point glass can be preferably used.
In addition to glass from the viewpoint of shape retention during firing, a material such as SiO ₂ , TiO ₂ , Al ₂ O ₃ , or a glass having a high softening point (any additional point of 700 ° C. or more) may be included as a filler component. The content of the filler depends on the thickness of the coating layer having the softening point of the low softening point glass and the firing temperature, but is preferably 1 to 40 parts by weight of the filler with respect to 100 parts by weight of the low softening point glass. More preferably, it is 2 to 15 parts by weight.

  It is preferable that a part or all of the partition wall surface is coated with an insulating material. By coating with an insulating material, it is possible to easily suppress the dielectric breakdown of the electrode, and to manufacture a more reliable PDP. Unless covered with an insulating material, the display electrode tends to cause dielectric breakdown, and the drive circuit tends to break due to overcurrent.

As the insulating _{material, MgO, MgGd 2 O 4,} BaGd 2 O 4, Sr 0.6 Ca 0.4 Gd 2 O 4, Ba 0.6 Sr 0.4 Gd 2 O 4, SiO 2, TiO 2, Al 2 O 3, the above-mentioned It is preferable to include at least one or more selected from the group of low softening point glasses.

Further, it is preferable that part or all of the phosphor is coated with an insulating material. This is because it is possible to reduce a decrease in luminance and a change in chromaticity of the phosphor due to the discharge, thereby providing a display having a longer life. The above-described materials can be used as the insulating material. Preferably, it contains 70% or more of MgO. More preferably, it contains 90% or more of MgO. This is because MgO is excellent in spatter resistance due to discharge and has a high secondary electron emission coefficient, so that the firing voltage can be lowered and the stability of discharge can be increased. Further, a material that has as good a transmittance of the excitation ultraviolet light of the PDP as possible is preferable. For example, fluorides such as MgF ₂ , CaF ₂ , and BaF ₂ can be used. Preferably, a mixed material of MgO and MgF ₂ can be preferably used.

  Next, a manufacturing procedure of the plasma display member and the plasma display of the present invention will be described with reference to FIG. Here, an AC type plasma display will be described as an example of a manufacturing procedure, but the present invention is not necessarily limited to this structure.

First, a method for manufacturing a PDP member will be described.
As the substrate as the PDP member of the present invention, "PD200" manufactured by Asahi Glass Co., Ltd. or "PP8" manufactured by Nippon Electric Glass Co., Ltd., which is a heat-resistant glass for PDP, can be used in addition to soda glass.

Address electrodes are formed on a glass substrate in stripes at a pitch of the discharge cells using a metal such as silver, aluminum, chromium, or nickel. As a method of forming, a method of pattern-printing a metal paste containing these metal powders and an organic binder as main components by screen printing, or applying a photosensitive metal paste using a photosensitive organic component as an organic binder, It is possible to use a photosensitive paste method in which pattern exposure is performed using a photomask, unnecessary portions are dissolved and removed in a developing step, and the electrode pattern is formed by heating and baking usually at 400 to 600 ° C. In addition, after depositing a metal such as chromium or aluminum on a glass substrate, a resist is applied, the resist is subjected to pattern exposure and development using a photomask, and then an etching method is used to remove an unnecessary portion of the metal by etching. Can be.
Further, a dielectric layer may be provided on the address electrode layer for stabilizing discharge.

The step of arranging the display electrode pairs on the partition wall and the surface and / or inside of the partition wall on the glass substrate on which the address electrode is formed will be described.
First, a lower partition wall is formed on the substrate on which the address electrodes are formed up to the height at which the electrodes are formed. Examples of a method for forming the partition include a sand blast method, a mold transfer method, and a photolithography method. The material of the partition used in the present invention is not particularly limited, and a known material can be applied. The partition shape is not particularly limited, but is preferably a grid shape when forming the auxiliary electrode.

  Next, an electrode is formed on the lower partition. As a manufacturing method of the electrode, a known material and method similar to the method described in the manufacturing method of the address electrode can be used. In the case of forming an electrode on the surface of the partition, a coating step of an insulating material and formation of a phosphor described below are performed, but in the case of forming an electrode inside the partition, the electrode is subsequently formed on the lower partition. An upper partition is further formed on the electrode.

  By forming the lower partition, the electrode, and the upper partition in this order, the electrode can be formed inside the partition. A photolithography method is preferred as a method for forming the partition walls in terms of processing accuracy and uniformity when forming a partition wall having a high aspect ratio. In addition, the photolithography method is also suitable as a method for manufacturing an electrode because of the high uniformity of the interval between the electrodes, particularly the auxiliary electrodes.

  A method for forming a partition by photolithography will be described, but the present invention is not limited to this. The partition can be formed using a known photosensitive glass paste. The photosensitive glass paste contains, for example, a photosensitive component selected from at least one of a photosensitive monomer, a photosensitive oligomer, and a photosensitive polymer, and further, if necessary, a binder, a photopolymerization initiator, an ultraviolet light absorber, Additives such as sensitizers, sensitization aids, polymerization inhibitors, plasticizers, thickeners, antioxidants, dispersants, organic or inorganic suspending agents and leveling agents, low melting glass, and fillers At least one type of high melting point glass is included. After these various components are blended so as to have a predetermined composition, the mixture is uniformly mixed and dispersed with a three-roller or a kneader to produce a photosensitive glass paste.

  The paste viscosity is appropriately adjusted by the addition ratio of a glass powder, a thickener, an organic solvent, a plasticizer, a suspending agent, and the like, and the range is 2000 to 20000 cps (centipoise). For example, when the coating on the substrate is performed by a spin coating method other than the slit die coater method or the screen printing method, 200 to 5000 cps is preferable.

  On the substrate made of glass, ceramics, polymer film, or the like, the prepared photosensitive glass paste is applied over the entire surface or partially applied. As a coating method, a method such as screen printing, a bar coater, a roll coater, a die coater, and a blade coater can be used. The coating thickness can be adjusted by the number of coatings, the mesh of the screen, and the viscosity of the paste.

Here, when applying the paste on the substrate, surface treatment of the substrate can be performed in order to increase the adhesion between the substrate and the coating film.
After the application, exposure is performed using an exposure device. The exposure is generally performed by a mask exposure using a photomask, as is performed by a normal photolithography method. As the mask to be used, either a negative type or a positive type is selected depending on the type of the photosensitive organic component. Alternatively, a method of directly drawing with a red or blue laser beam or the like without using a photomask may be used. As the exposure device, a stepper exposure device, a proximity exposure device, or the like can be used. In the case of performing a large-area exposure, after applying a photosensitive paste on a substrate such as a glass substrate, and performing the exposure while transporting, it is possible to expose a large area with an exposure machine having a small exposure area. it can.

After the exposure, development is carried out by utilizing the difference in solubility between the photosensitive portion and the non-photosensitive portion in the developing solution.
The step of firing the substrate including the partition pattern is performed in a firing furnace. The firing atmosphere and temperature vary depending on the type of paste or substrate, but firing is performed in an atmosphere of air, nitrogen, hydrogen, or the like. The firing temperature is 400 to 610 ° C. As the firing furnace, a batch-type firing furnace or a belt-type continuous firing furnace can be used. In addition, a heating step of 50 to 300 ° C. may be introduced during the above steps for the purpose of drying and preliminary reaction.

  Next, a method of forming a display electrode pair by photolithography will be described, but the present invention is not limited to this. The display electrode pair can be formed using a known photosensitive electrode paste. As a photosensitive electrode paste, for example, a conductive metal powder such as Au, Ni, Ag, Pd, Pt, Al, and Cr and a paste containing a photosensitive organic component as a main component are used to form a thin film pattern for electrode formation. Can be formed.

After the photosensitive metal paste is applied on the lower partition walls at a time, actinic rays are irradiated through a mask for obtaining a desired pattern. For irradiation with actinic rays, a proximity exposure machine or the like can be used. In the case of performing exposure in a large area, a large area can be exposed by an exposure machine having a small exposure area by applying a photosensitive paste on a substrate and then performing exposure while transporting the photosensitive paste.
After the exposure, development processing is performed by an immersion method, a spray method, a brush method, or the like, utilizing the difference in solubility between the exposed portion and the unexposed portion in a developing solution.
Next, firing is performed in a firing furnace. The firing atmosphere and temperature vary depending on the type of paste or substrate, but firing is performed in an atmosphere such as air, nitrogen, or hydrogen. As the firing furnace, a batch-type firing furnace or a belt-type continuous firing furnace can be used.

In each step of forming the lower partition, the display electrode pair, and the upper partition, baking may be performed each time, but after forming the upper partition for further cost reduction, the final baking is performed, The lower partition may be fired once, and the electrode and the upper partition may be fired collectively, or the address electrode and the partition may be fired collectively.
When the electrode and the partition are fired at one time, it is preferable to cure by heat after forming the electrode in order to suppress disconnection and cracks. The curing condition is preferably a temperature range of 140 to 300 ° C. and a time range of 3 to 30 minutes. More preferably, it is a time range of 5 to 30 minutes at a temperature range of 150 to 250 ° C. Here, the curing does not include mere drying performed at about 120 ° C. or lower. For curing, a hot air dryer or an IR dryer can be used. Further, it is preferable to use a paste having as small a firing stress as possible as the paste for forming the partition walls and the electrodes. A urethane compound can be added to reduce the firing stress.

Examples of the urethane compound include a compound represented by the following general formula (1).
R ^1- (R ⁴ -R ³ ) _n -R ⁴ -R ² (1)
(R ¹ and R ² are each selected from the group consisting of a substituent containing an ethylenically unsaturated group, hydrogen, an alkyl group having 1 to 20 carbon atoms, an aryl group, an aralkyl group and a hydroxyaralkyl group, and R ³ is an alkylene oxide group or an alkylene oxide oligomer, R ⁴ is an organic group containing a urethane bond, and n is a natural number of 1 to 10.)
Such a urethane compound preferably contains an ethylene oxide unit. More preferably, in the general formula (1), R ³ is an oligomer containing an ethylene oxide unit (hereinafter, referred to as EO) and a propylene oxide unit (hereinafter, referred to as PO), and The EO content is in the range of 8 to 70% by weight. When the EO content is 70% by weight or less, flexibility can be further improved and firing stress can be reduced, so that defects can be effectively suppressed. Further, the thermal decomposability is improved, and a firing residue is less likely to be generated in a firing step after formation of the partition walls. When the EO content is 8% or more, the compatibility with other organic components is improved.

  It is also preferable that the urethane compound has a carbon-carbon double bond. When the carbon-carbon double bond of the urethane compound reacts with the carbon-carbon double bond of another crosslinking agent and is contained in the crosslinked product, polymerization shrinkage can be further suppressed.

Specific examples of the urethane compound preferably used in the present invention include UA-2235PE (molecular weight 18,000, EO content 20%), UA-3238PE (molecular weight 19000, EO content 10%), UA-3348PE (molecular weight 22,000, EO). Content 15%), UA-5348PE (molecular weight 39000, EO content 23%) (all manufactured by Shin-Nakamura Chemical Co., Ltd.) and the like, but are not limited thereto. Further, these compounds may be used as a mixture.
The content of the urethane compound is preferably 0.1 to 20% by weight in the paste. When the content is 0.1% by weight or more, an effect of appropriately controlling peeling can be obtained. If the content exceeds 20% by weight, the dispersibility of the organic component and the inorganic fine particles decreases, and defects tend to occur.

  As described above, the case where the lower partition, the electrode, and the upper partition are sequentially formed is described. However, the partition paste for forming the lower partition is applied, dried, exposed, and then the electrode is continuously applied without development. , Drying, curing, and development (the electrode paste has a much faster development time than the barrier rib paste, so the display electrode pair can be formed before the development of the barrier rib paste progresses). Apply and dry the barrier rib paste to form the barrier ribs, and pattern the upper and lower barrier ribs collectively (in the case of the sandblasting method, the cutting operation is performed using abrasive sand; in the case of the photolithography method, the developing operation is performed). May go.

  After the upper partition is formed, a partition for securing a clearance from the front-side substrate may be further provided in order to improve the efficiency of evacuation after paneling. This clearance partition may also be patterned together with the upper and lower layers.

Next, in the case where an electrode is formed on the surface of the partition wall or the electrode is formed on one side surface of the partition wall, the surface of the electrode exposed to the discharge space may be covered with an insulating material. The coating method is not particularly limited, and a known method can be applied. For example, from the viewpoint of film uniformity in a thin film state, a sputtering method and a vacuum evaporation method are preferable. From the viewpoint of low cost, a screen printing method, a dispenser method, and a photosensitive paste method in which an insulating paste containing an insulating material and a binder is applied are preferable. The thickness of the coating layer is not particularly limited, but is preferably 0.5 to 50 μm. More preferably, it is 2 to 20 μm. If the thickness is smaller than 0.5 μm, the function of electrical insulation is hardly exhibited. On the other hand, when the thickness is larger than 50 μm, the discharge space of the discharge cell becomes too narrow, and the luminance tends to decrease.
For example, in the case of coating with a low softening point glass, a paste obtained by kneading a low softening point glass frit, an organic binder (e.g., ethylcellulose or acrylic resin), and a solvent (e.g., terpineol) with three rolls can be used. Each composition can be appropriately adjusted depending on the thickness of the coating layer, application conditions, and the like.

  The baking for removing the resin component is preferably performed at a temperature at which the resin to be used is sufficiently debindered. In the case where a cellulosic resin is used as the resin, the temperature is, for example, 450 to 650 ° C. When an acrylic resin is used, the temperature is 430 to 650 ° C. If the firing temperature is too low, the resin component tends to remain, while if it is too high, strain is introduced into the glass substrate and cracks occur.

A phosphor is formed using a phosphor paste on a glass substrate on which address electrodes, partition walls, and display electrode pairs are formed. It can be formed by a photolithography method using a photosensitive phosphor paste, a dispenser method, a screen printing method, or the like. Although the thickness of the phosphor is not particularly limited, it is 10 to 30 μm, and more preferably 15 to 25 μm. The phosphor powder is not particularly limited, but the following phosphors are preferred from the viewpoints of emission intensity, chromaticity, color balance, life, and the like. Blue is an aluminate phosphor activated with divalent europium (for example, BaMgAl ₁₀ O ₁₇ : Eu) or CaMgSi ₂ O ₆ . The green, Zn ₂ SiO terms of panel intensity _{4: Mn, YBO 3: Tb} , BaMg 2 Al 14 O 24: Eu, Mn, BaAl 12 O 19: Mn, BaMgAl 14 O 23: Mn is preferred. More preferably, it is Zn ₂ SiO ₄ : Mn. Similarly, for red, (Y, Gd) BO ₃ : Eu, Y ₂ O ₃ : Eu, YPVO: Eu, and YVO ₄ : Eu are preferable. More preferably, it is (Y, Gd) BO ₃ : Eu.

  After forming the phosphor, part or all of the phosphor may be covered with an insulating material. The coating method and the like are the same as those described above for the coating of the partition walls, but the firing temperature of the layer for coating the phosphor should be 550 ° C. or less to minimize the deterioration of the phosphor. Is preferred. More preferably, it is 510 ° C or lower.

Next, a method for manufacturing a plasma display will be described.
After sealing the PDP member of the present invention and the glass substrate, the space formed between the two substrates is evacuated while heating, and then a discharge gas composed of helium, neon, xenon or the like is filled. And seal. A mixed gas of Xe5 to 10% -Ne bal. Is preferable from both sides of the discharge voltage and the luminance. Xe may be further increased to about 30% in order to increase the generation efficiency of ultraviolet rays.

Finally, a driving circuit is mounted, and aging is performed to produce a PDP.
Here, an example of manufacturing a PDP using the PDP member of the present invention and a glass substrate has been described. However, in order to improve the spatter resistance of the glass substrate, a glass substrate on which an MgO film is formed, and a bright room contrast is improved. For this purpose, a plasma display may be manufactured by sealing a glass substrate on which a black stripe or a black matrix is formed and the PDP member of the present invention.

  Hereinafter, the present invention will be specifically described using examples. However, the present invention is not limited to this. First, a method for evaluating the insulating property of the electrode and a method for measuring the relative luminous efficiency will be specifically described.

(Evaluation method of electrode insulation)
A voltage of 60 Hz was gradually applied to the electrodes of the sealed PDP filled with discharge gas using a dielectric strength measuring device (“TOS9201”, manufactured by Kikusui Electronics Co., Ltd.). The measured voltage was measured. The higher the dielectric breakdown voltage, the better, but it is better if it is 2 kV or more, and practically no problem if it is 1 kV or more.

(Measurement of relative luminous efficiency)
Luminous efficiency was determined as follows. First, the luminance B (cd / m ² ) of the produced PDP was measured using a colorimeter “CS-1000” manufactured by Minolta. The power W (W) applied to the PDP at this time was determined using a digital power meter (2532, manufactured by Yokogawa Electric Corporation). Then, the luminous efficiency η was obtained from the following equation.
η = πB · S / W
Here, S is the area (m ² ) of the display portion of the manufactured PDP.
The luminous efficiency when the luminous efficiency of Comparative Example 1 was set to 100 was defined as relative luminous efficiency.

(Example 1)
A plasma display was manufactured according to the following procedure. First, an address electrode pattern was formed on a "PD200" glass substrate (13 inches) manufactured by Asahi Glass Co., Ltd. by a photolithography method using a photosensitive silver paste. The width of the address electrode was 150 μm, the pitch was 360 μm, and the thickness after firing was 4 μm. Next, a dielectric layer having a thickness of 20 μm was formed on the glass substrate on which the address electrodes were formed by a screen printing method. Thereafter, a photosensitive glass paste prepared in advance was uniformly applied on a glass substrate on which an address electrode pattern and a dielectric layer were formed using a slit die coater. The thickness of the coating film was adjusted to 50 μm after firing. Then, it was kept at 80 ° C. for 1 hour and dried.
Subsequently, ultraviolet light was exposed from above using a negative-type chrome mask from an upper surface using an ultrahigh-pressure mercury lamp.

  Next, development and washing with a 0.3% by weight aqueous solution of monoethanolamine kept at 35 ° C., washing with water are performed to remove a space portion that has not been photocured, and baking is performed at 590 ° C. to form a main partition and an auxiliary partition. A (lattice-like) partition wall of the lower partition part was formed. The width of the main partition was 60 μm at the top, 120 μm at the bottom, and the pitch was 360 μm. The width of the auxiliary partition was 80 μm at the top and 150 μm at the bottom, and the pitch was 1.08 mm (discharge cell width: 740 μm, non-discharge cell width: 340 μm).

The composition of the photosensitive glass paste used was as follows. 60 parts by weight of glass powder, 10 parts by weight of a binder (copolymer of methyl methacrylate and methacrylic acid (average molecular weight 25,000, acid value 102), 10 parts by weight of a photosensitive monomer (tetrapropylene glycol diacrylate), photopolymerization initiator ( "Irgacure" 369, manufactured by Ciba Geigy Co., Ltd., 17 parts by weight of γ-butyrolactone The glass powder has a glass transition point of 495 ° C., a softening point of 530 ° C., a coefficient of thermal expansion of 75 × 10 ⁻⁷ / ° C., and a density of 2.54 g / cm ^3. Was used.
The paste was prepared by kneading a mixture of these components with a three-roller kneader.

  Subsequently, a photosensitive silver paste was printed on the lower part of the main partition and the auxiliary partition. After drying, the film was exposed to ultraviolet light from an upper surface using a negative-type chrome mask with an ultra-high pressure mercury lamp. After developing and washing with a 0.3% by weight aqueous solution of monoethanolamine kept at 35 ° C. and washing with water to remove a space portion that was not photocured, the resultant was fired at 590 ° C. to form a display (sustain) electrode pattern. The display electrode pattern has a stripe-shaped main display electrode pattern on a partition serving as an auxiliary partition of the lattice partition, and auxiliary electrodes projecting from a pair of main display electrodes on a partition serving as the main partition so as to face each other with a gap of 100 μm. It was formed to have a pattern.

The photosensitive silver paste is prepared by dissolving 12 parts by weight of a binder resin, 6 parts by weight of a crosslinking agent, 3 parts by weight of a polymerization inhibitor and 20 parts by weight of dipropylene glycol monomethyl ether while heating to 50 ° C., and then 150 parts by weight of silver fine particles. And 5 parts by weight of a low melting glass powder) and kneaded using a kneader. The binder resin is an acrylic polymer (a styrene / methyl methacrylate / methacrylic acid copolymer obtained by the addition reaction of 0.4 equivalent of glycidyl methacrylate to a carboxyl group. Weight average molecular weight 43000, acid value 95) 40% γ- Used as butyrolactone solution. As a cross-linking agent, trimethylolpropane triacrylate (“TPA330”, manufactured by Nippon Kayaku Co., Ltd., trifunctional) was used. As the polymerization inhibitor, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -1-butanone was used. Silver particles having an average particle size of 1.5 μm and a specific surface area of 0.80 m ² / g were used. The low melting point glass used had a glass transition point of 460 ° C. and a softening point of 495 ° C.

Next, the photosensitive glass paste 1 was applied on a glass substrate on which the address electrode pattern, the dielectric, the lower partition, and the display electrode pattern were formed using a slit die coater and dried.
Subsequently, ultraviolet light was exposed from above using a negative-type chrome mask from an upper surface using an ultrahigh-pressure mercury lamp. Next, after developing and washing with a 0.5% by weight aqueous solution of monoethanolamine kept at 35 ° C. and washing with water to remove a space portion that has not been photocured, the display electrode pattern is disposed inside the partition wall by baking. The upper partition was formed as described above. The height of the upper partition wall was 70 μm. The upper partition wall was a grid-like partition pattern including a main partition wall and an auxiliary partition wall, similarly to the lower partition wall. Further, a photosensitive glass paste was applied using a screen printing method, and then dried. Exposure and development were performed in the same manner to form a barrier rib pattern on a stripe having a height of 10 μm only on the main barrier ribs, thereby improving the vacuum evacuation conductance when the panel was formed.

Then, a phosphor paste containing a phosphor powder and an organic binder was applied to a thickness of 20 μm using a dispenser, and then fired at 500 ° C. to form a phosphor. Thus, a PDP member was manufactured.
Next, an MgO film having a thickness of 500 nm was formed on a “PD200” glass substrate by an electron beam evaporation method.

The PDP member and the glass substrate on which the MgO film was formed were sealed at 450 ° C. using a sealing frit paste containing PbO as a main component. A high-level alignment device was not required for the sealing, and the sealing could be performed visually. Thereafter, the inside of the sealed panel was evacuated while being heated to 350 ° C., cooled to room temperature, and then Xe5% -Ne bal. Was sealed, sealed, and subjected to an aging treatment for 10 hours to complete a PDP.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 1.8 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 150.

(Example 2)
A PDP was prepared in the same manner as in Example 1, except that an MgO film (1 μm in thickness) was formed by electron beam evaporation after forming the phosphor.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 1.9 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 162.

(Example 3)
Without the upper layer of the partition wall after forming the display electrode pattern formation, except that covering the display electrodes in PbO-B ₂ O ₃ -based low-softening point glass of the glass softening point 458 ° C. In the screen printing method, Example A PDP was prepared in the same manner as in No. 1. The height of the lower partition wall was 80 μm, and the height of the coating layer of the low softening point glass was 40 μm.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.3 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 143.

(Example 4)
A PDP was prepared in the same manner as in Example 3, except that the MgO film after forming the phosphor was not formed.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.3 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 155.

(Example 5)
A PDP was prepared in the same manner as in Example 1, except that the upper electrode partition was not formed after the display electrode pattern was formed, and the display electrode was covered with a SiO ₂ film by an electron beam evaporation method. The height of the lower partition wall was 116 μm, and the height of the SiO ₂ coating layer was 3 μm.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.1 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 153.

(Example 6)
An auxiliary electrode of the display electrode pattern, also formed on one side of the partition (discharge cell side), the entire display electrode pattern in PbO-B ₂ O ₃ -based low-softening point glass of the glass softening point 458 ° C. In the screen printing method Coated to cover. Further, an upper partition wall was formed, and the lower partition wall height was 50 μm, the coating layer was 20 μm, and the upper partition wall height was 50 μm. Except for these, a PDP was prepared in the same manner as in Example 2.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.0 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 192.

(Example 7)
A PDP was prepared in the same manner as in Example 6, except that an MgO film (1 μm thickness) was not formed by electron beam evaporation after forming the phosphor.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.0 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 189.

(Example 8)
A PDP was prepared in the same manner as in Example 2, except that the electrode interval of the auxiliary electrode pattern was 120 μm.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.4 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 153.

(Example 9)
A PDP was prepared in the same manner as in Example 2 except that the electrode interval of the auxiliary electrode pattern was 80 μm.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.3 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 175.

(Example 10)
Xe 10% -Ne bal. A PDP was prepared in the same manner as in Example 9 except that a mixed gas of PDP was used.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.3 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 190.

(Example 11)
Xe 15% -Ne bal. A PDP was prepared in the same manner as in Example 9 except that a mixed gas of PDP was used.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.3 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 200.
(Example 12)
A PDP was prepared in the same manner as in Example 2, except that the display electrode pattern had a height of 50 μm and a width of 40 μm in the cross section of the auxiliary partition wall.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 1.8 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 190.
(Example 13)
A PDP was prepared in the same manner as in Example 2, except that the display electrode pattern had a height of 70 μm and a width of 40 μm in the cross section of the auxiliary partition wall.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 1.8 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 195.
(Example 14)
A PDP was prepared in the same manner as in Example 2 except that no auxiliary electrode was provided.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.5 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 120.
(Example 15)
A PDP was prepared in the same manner as in Example 12, except that the auxiliary electrode was not provided and the display electrode pattern had a height of 50 μm and a width of 40 μm in the cross section of the auxiliary partition.
When the insulation properties of the display electrode were evaluated, the breakdown voltage was 2.5 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 128.
(Example 16)
For forming the lower partition, a paste obtained by adding 5% by weight of TiO ₂ nanoparticles (diameter: 7 nm) as a filler to the photosensitive glass paste 1 was used, and for forming the upper partition, a black pigment ( A PDP was prepared in the same manner as in Example 9, except that a paste containing 3% by weight of a Cu-Fe-Mn composite oxide) was used.
When the insulation properties of the display electrode were evaluated, the breakdown voltage was 2.2 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 180.

(Example 17)
Pixel pitch: 200 μm, address electrode width: 90 μm, pitch: 200 μm, main partition width: top 45 μm, bottom 70 μm, pitch 200 μm, auxiliary partition width: top 60 μm, bottom 120 μm, pitch: 0.6 mm (discharge cell width: 320 μm, A PDP was prepared in the same manner as in Example 9, except that the non-discharge cell width was 280 μm.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 1.9 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 140.

(Example 18)
A PDP was manufactured in the same manner as in Example 1, except that the interval between the auxiliary electrodes was set to 30 μm.
When the insulation properties of the display electrode were evaluated, the breakdown voltage was 0.8 kV.
Similarly, when a PDP was manufactured and driven, display unevenness was easy to occur, but an image could be displayed in most parts. The relative luminous efficiency was 158.

(Example 19)
A PDP was produced in the same manner as in Example 1, except that the cell design was changed so that the gap between the auxiliary electrodes was 1100 μm.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 3.2 kV.
Similarly, when a PDP was manufactured and driven, the driving voltage was high, three drive ICs failed, and display unevenness was likely to occur.

(Example 20)
A PDP was manufactured in the same manner as in Example 1 except that the gap between the main display electrodes was 1100 μm.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 1.8 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 160.

(Comparative Example 1)
An address electrode pattern was formed on a "PD200" glass substrate (42 inches) manufactured by Asahi Glass Co., Ltd. by a photolithography method using a photosensitive silver paste. The width of the address electrode was 150 μm, the pitch was 360 μm, and the thickness after firing was 4 μm. Next, a dielectric layer having a thickness of 20 μm was formed on the glass substrate on which the address electrodes were formed by a screen printing method. Thereafter, a photosensitive glass paste was prepared, and was uniformly applied and dried by a screen printing method on a glass substrate on which an address electrode pattern and a dielectric layer were formed. Coating and drying were repeated several times or more in order to avoid generation of pinholes and the like in the coating film, and the film thickness was adjusted. Then, it was kept at 80 ° C. for 1 hour and dried.
Subsequently, ultraviolet light was exposed from above using a negative-type chrome mask from an upper surface using an ultrahigh-pressure mercury lamp.

Next, developing and washing with a 0.5% by weight aqueous solution of monoethanolamine kept at 35 ° C., washing with water, removing a space portion that has not been photocured, and forming a stripe-shaped partition wall glass pattern on the back plate glass substrate. Formed. The width of the partition wall was 60 μm at the top, 120 μm at the bottom, and the pitch was 360 μm.
Next, a phosphor was formed to a thickness of 20 μm by a dispenser method and fired to produce a back plate.

  Next, after forming an ITO electrode (electrode interval of discharge cells is 100 μm, electrode interval of non-discharge cells is 340 μm, and ITO electrode width is 320 μm) on a “PD200” glass substrate by a photoetching method, a photosensitive silver paste is applied. A bus electrode pattern was formed by the used photolithography method. The bus electrode had a thickness of 6 μm and a width of 90 μm. Thereafter, a transparent dielectric layer was formed with a thickness of 30 μm by a screen printing method. Further, an MgO film having a thickness of 500 nm was formed by an electron beam evaporation method to obtain a front plate. The pixel pitch of the front plate was 1.08 mm.

The front plate and the rear plate thus manufactured were sealed at 450 ° C. using a sealing frit paste containing PbO as a main component. Thereafter, the inside of the sealed panel was evacuated while being heated to 350 ° C., cooled to room temperature, and then Xe5% -Ne bal. Was sealed, sealed, and subjected to an aging treatment for 10 hours to complete a PDP.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.7 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 100.

(Comparative Example 2)
A PDP was prepared in the same manner as in Comparative Example 1, except that the pixel pitch of the back plate was 200 μm, the address electrode width was 90 μm, the partition wall width was 60 μm, and the pixel pitch of the front plate was 600 μm and the ITO electrode width was 200 μm.
When the insulation properties of the display electrodes were evaluated, the breakdown voltage was 2.3 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was 73.

  The panel structures, discharge gas, insulation evaluation results of display electrodes, and relative luminous efficiencies of Examples 1 to 20 and Comparative Examples 1 and 2 are shown. Examples 1 to 16, 18, and 20 are PDPs having higher relative luminous efficiency and higher luminous efficiency than Comparative Example 1. In particular, Examples 6, 7, and 10 to 12 are displays with high luminous efficiency. When Examples 9 and 17 are compared with Comparative Examples 1 and 2, Example 17 is a PDP having a small degree of decrease in luminous efficiency when the definition is increased, and having high luminous efficiency even at high definition.

(Example 21)
After patterning the address electrodes in the same manner as in Example 9, curing was performed at 200 ° C. for 30 minutes. Example 9 was repeated except that a dielectric layer, a lower partition, a display electrode, and an upper partition were successively formed without baking, and finally, these were batch-baked at 590 ° C. for 15 minutes. A PDP was prepared in the same manner as described above. Although disconnection and cracking of the electrode and the partition wall occurred at two places, there was no practical problem as a display.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.1 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was the same as in Example and 9.

(Example 22)
After patterning the lower partition, a PDP was prepared in the same manner as in Example 9 except that the display electrode and the upper partition were successively formed without firing, and these were collectively fired at 590 ° C. for 15 minutes. Created. Although disconnection and cracking of the electrode and the partition wall occurred in one place, there was no practical problem as a display.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.1 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was the same as in Example and 9.

(Example 23)
Patterning of the partition is performed by applying and drying and sandblasting a glass paste composed of glass powder, a filler, and an organic binder (a substance obtained by dissolving ethyl cellulose with terpineol) without using a photosensitive glass paste for forming the partition. Further, the same paste was screen-printed only on the main partition walls so as to form a stripe having a height of 10 μm after firing. No disconnection or cracking of the electrodes and the partition walls occurred, but the uniformity of the formed cells was lower than in Example 9 and the discharge voltage margin was slightly lower, but at a level that was not problematic in practical use.
When the insulation property of the display electrode was evaluated, the breakdown voltage was 2.1 kV.
Similarly, when a PDP was manufactured and driven, an image could be displayed without any problem. The relative luminous efficiency was the same as in Example and 9.

FIG. 2 is a perspective view illustrating a conventional three-surface discharge type AC plasma display. Sectional drawing of the front plate of the conventional three-surface discharge type AC plasma display. FIG. 1 is a perspective view of a plasma display (without auxiliary electrodes) of the present invention. FIG. 1 is a perspective view of a plasma display (with auxiliary electrodes) of the present invention. (Excluding phosphor) FIG. 2 is a cross-sectional view including a display electrode of the plasma display of the present invention (for example, a cross-sectional view of FIG. 1). Sectional drawing including the display electrode of the plasma display of this invention (for example, Example 12, 13, 15). FIG. 3 is a perspective view of the plasma display of the present invention (when an auxiliary electrode is also formed on one side surface of a partition). (Excluding phosphors)

Explanation of reference numerals

1: Front plate 2: Glass substrate 3: Scan electrode (transparent electrode)
4: Sustain electrode (transparent electrode)
5: Bus electrode 6: Transparent dielectric layer 7: MgO protective film 8: Back plate 9: Glass substrate 10: Address electrode 11: Dielectric layer 12: Partition layer 13: Red phosphor 14: Green phosphor 15: Blue phosphor Body 16: discharge cell 17: non-discharge cell 18: main partition 19: auxiliary partition 20: main electrode 21: auxiliary electrode 22: phosphor 23: insulator layer

Claims (21)

A plasma display member having a plurality of electrodes, partition walls, and phosphors, wherein the electrodes are arranged on the surface and / or inside of the partition walls. The plasma display member according to claim 1, wherein the electrodes disposed on the surface and / or inside of the partition have a main electrode and an auxiliary electrode projecting from the main electrode in a direction facing each other. The plasma display member according to claim 2, wherein a gap between the auxiliary electrodes is 50 to 800 m. The plasma display member according to claim 2, wherein the gap between the main electrodes is 100 to 1000 m. The plasma display member according to any one of claims 1 to 4, wherein the electrodes are arranged only inside and on one side of the partition. The partition is composed of a main partition in a direction parallel to the address electrode and an auxiliary partition in a direction intersecting the main partition, the main electrode is disposed on the surface and / or inside the auxiliary partition, and the surface of the main partition and / or The plasma display member according to any one of claims 1 to 5, wherein an auxiliary electrode is provided inside. The plasma display member according to any one of claims 1 to 6, wherein the partition wall is composed of two or more layers having different reflectivities. The plasma display member according to claim 7, wherein the layer having a low reflectance is on the display surface side. The plasma display member according to any one of claims 1 to 8, wherein a part or all of the electrodes inside the display pixels are covered with glass having a glass softening point of 400 to 650 ° C. The plasma display member according to any one of claims 1 to 9, wherein a part or all of the partition wall surface is coated with an insulating material. The plasma display member according to any one of claims 1 to 10, wherein a part or all of the phosphor is coated with an insulating material. Insulating material is _{MgO, MgGd 2 O 4, BaGd} 2 O 4, Sr 0.6 Ca 0.4 Gd 2 O 4, Ba 0.6 Sr 0.4 Gd 2 O 4, SiO 2, TiO 2, Al 2 O 3, low softening point glass The plasma display member according to claim 10, comprising at least one member selected from the group consisting of: The plasma display member according to any one of claims 1 to 12, wherein a partition and electrodes arranged on the surface and / or inside of the partition are formed on the glass substrate. A plasma display using the plasma display member according to claim 1. A method for manufacturing a plasma display member having a plurality of electrodes, partition walls, and a phosphor, comprising a step of arranging electrodes on the surface and / or inside of the partition wall. 16. The method according to claim 15, wherein all or a part of the electrode is formed by a photolithography method. The method according to claim 15, wherein all or a part of the partition is formed by a photolithography method. The method for manufacturing a plasma display member according to claim 15, further comprising a step of coating a part or all of the partition walls with an insulating material. The method according to claim 15, further comprising a step of coating a part or all of the phosphor with an insulating material. The method according to claim 15, further comprising a step of firing the partition and the address electrode simultaneously. The method for manufacturing a plasma display member according to claim 15, further comprising a step of simultaneously firing the partition and the electrode.

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