JP2007035655A - Plasma display panel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PDP (plasma display panel) with improved discharge characteristics. <P>SOLUTION: In a position facing a discharge space S between a front glass substrate 1 and a back glass substrate 6, a magnesium oxide layer 5 containing crystalline powder wherein magnesium oxide crystalline performing cathode luminescence emission with a peak within a wave range of 200-300 nm excited by an electron beam is selected is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plasma display panel and a manufacturing method thereof.

  A surface discharge AC plasma display panel (hereinafter referred to as PDP) is a row extending in the row direction to one of the two glass substrates facing each other across a discharge space in which a discharge gas is sealed. The electrode pairs are arranged side by side in the column direction, the column electrodes extending in the column direction are arranged in the row direction on the other glass substrate, and the row electrode pairs and the column electrodes in the discharge space intersect each other in a matrix. A unit light emitting region (discharge cell) is formed.

  In this PDP, the protective function of the dielectric layer and the secondary to the unit light emitting region are provided at a position facing the unit light emitting region on the dielectric layer formed to cover the row electrode and the column electrode. A magnesium oxide (MgO) film having an electron emission function is formed.

  As a method for forming a magnesium oxide film in such a PDP manufacturing process, a screen printing method in which a paste mixed with magnesium oxide powder is applied onto a dielectric layer is a simple method. Adoption has been studied (for example, see Patent Document 1).

  However, in the case of forming a PDP magnesium oxide film by screen printing using a paste mixed with polycrystalline single-leaf magnesium oxide purified by heat treatment of magnesium hydroxide as in Patent Document 1, The discharge characteristics of the PDP are almost the same or slightly improved as when the magnesium oxide film is formed by vapor deposition.

  For this reason, it is desired that a magnesium oxide film (protective film) that can further improve the discharge characteristics can be formed on the PDP.

JP-A-6-325696

  An object of the present invention is to solve the problems in the conventional PDP on which the magnesium oxide film as described above is formed.

  The present invention includes at least the features according to the following independent claims.

  [Claim 1] A front substrate and a rear substrate facing each other through a discharge space, a plurality of row electrode pairs between the front substrate and the rear substrate, and a row electrode pair extending in a direction intersecting the row electrode pair In a plasma display panel provided with a plurality of column electrodes each forming a unit light emitting region in the discharge space at each intersection with the cathode luminescence emission having a peak in a wavelength range of 200 to 300 nm excited by an electron beam A plasma display panel, wherein a magnesium oxide layer including a crystal powder from which magnesium oxide crystals to be selected are selected is provided in a portion facing a unit light emitting region between the front substrate and the back substrate.

  [Claim 8] A front substrate and a rear substrate facing each other through the discharge space, and a pair of row electrodes which form unit light emitting regions in the discharge space of the portion disposed between the front substrate and the rear substrate and intersecting each other, and A method of manufacturing a plasma display panel having a column electrode, a dielectric layer covering a row electrode pair, and a magnesium oxide layer formed in a portion facing a discharge space, wherein the magnesium oxide layer is formed. , A step of selecting a magnesium oxide crystal that emits cathode luminescence having a peak in a wavelength range of 200 to 300 nm when excited by an electron beam, and a crystalline magnesium oxide layer including the selected crystal powder is formed A method of manufacturing a plasma display panel, comprising a step.

  The present invention relates to a magnesium oxide crystal that emits cathode luminescence having a peak in a wavelength range of 200 to 300 nm when excited by an electron beam at a position facing a discharge space between a front glass substrate and a rear glass substrate. A PDP provided with a crystalline magnesium oxide layer formed from a crystalline powder having a particle size distribution in which the proportion of crystalline particles having a particle size equal to or greater than a predetermined value is classified from the powder of Furthermore, from the powder of the magnesium oxide crystal to the step of forming the crystalline magnesium oxide layer including the magnesium oxide crystal that emits cathode luminescence light having a peak in the wavelength range of 200 to 300 nm when excited by an electron beam. A crystal having a particle size distribution in which the proportion of crystals having a predetermined particle size or more is a predetermined value or more. The manufacturing method of a PDP classification step of the body powder classification is included, and its best mode.

  According to the PDP in this embodiment, the crystalline magnesium oxide layer formed so as to face the discharge space emits cathode luminescence having a peak in the wavelength range of 200 to 300 nm when excited by an electron beam. By including the magnesium crystal, the discharge characteristics such as the discharge probability and the discharge delay in the PDP can be improved and good discharge characteristics can be obtained, and the magnesium oxide crystal powder forming this crystalline magnesium oxide layer However, through the classification process in the manufacturing process of the PDP, a further significant improvement in the discharge delay can be achieved by having a particle size distribution in which the proportion of crystals having a predetermined particle size or more is a predetermined value or more. For reducing variation in discharge delay, reducing discharge voltage, improving luminous efficiency, and reducing gas adsorption Effects such as that panel improve the reliability of is exhibited.

  1 to 3 show an example of an embodiment of a PDP according to the present invention, FIG. 1 is a front view schematically showing the PDP in this example, and FIG. 2 is a cross-sectional view taken along line V-V in FIG. FIG. 3 and FIG. 3 are sectional views taken along line WW in FIG.

  The PDP shown in FIGS. 1 to 3 has a plurality of row electrode pairs (X, Y) in the row direction of the front glass substrate 1 (left and right direction in FIG. 1) on the back surface of the front glass substrate 1 as a display surface. They are arranged in parallel so as to extend.

  The row electrode X includes a transparent electrode Xa made of a transparent conductive film such as ITO formed in a T shape, and a metal film that extends in the row direction of the front glass substrate 1 and is connected to a narrow base end portion of the transparent electrode Xa. And the bus electrode Xb.

  Similarly, the row electrode Y is connected to the transparent electrode Ya made of a transparent conductive film such as ITO formed in a T-shape and the narrow base end portion of the transparent electrode Ya extending in the row direction of the front glass substrate 1. The bus electrode Yb is made of a metal film.

  The row electrodes X and Y are alternately arranged in the column direction (vertical direction in FIG. 1) of the front glass substrate 1, and the transparent electrodes Xa and Ya arranged in parallel along the bus electrodes Xb and Yb are respectively Extending to the paired row electrode side, the tops of the wide portions of the transparent electrodes Xa and Ya are opposed to each other via a discharge gap g having a required width.

  The back surface of the front glass substrate 1 extends in the row direction along the bus electrodes Xb and Yb between the bus electrodes Xb and Yb of the row electrode pairs (X, Y) adjacent to each other in the column direction. A black or dark light absorption layer (light shielding layer) 2 is formed.

  Further, a dielectric layer 3 is formed on the back surface of the front glass substrate 1 so as to cover the row electrode pair (X, Y), and adjacent row electrode pairs are formed on the back surface of the dielectric layer 3. Raised to protrude toward the back side of the dielectric layer 3 at a position facing the bus electrodes Xb and Yb adjacent to each other (X, Y) back to back and a position facing the region between the adjacent bus electrodes Xb and Yb. Dielectric layer 3A is formed to extend in parallel with bus electrodes Xb and Yb.

  A thin magnesium oxide layer (hereinafter referred to as a thin film magnesium oxide layer) 4 formed by vapor deposition or sputtering is formed on the back side of the dielectric layer 3 and the raised dielectric layer 3A. The entire back surface of the layer 3 and the raised dielectric layer 3A is covered.

  On the back side of the thin-film magnesium oxide layer 4, a cathode having a peak in the wavelength range of 200 to 300 nm (particularly in the range of 230 to 250 nm, around 235 nm) by being excited by an electron beam, as will be described in detail later. A magnesium oxide layer (hereinafter referred to as a crystalline magnesium oxide layer) 5 containing a magnesium oxide crystal that emits luminescence (CL emission) is formed.

  The crystalline magnesium oxide layer 5 is formed on the entire back surface of the thin film magnesium oxide layer 4 or a part thereof, for example, a portion facing a discharge cell described later (in the illustrated example, the crystalline magnesium oxide layer 5 is thin film oxidized. An example in which it is formed on the entire back surface of the magnesium layer 4 is shown).

  On the other hand, on the display side surface of the rear glass substrate 6 arranged in parallel with the front glass substrate 1, the column electrode D is connected to the transparent electrodes Xa and Ya that are paired with each other in each row electrode pair (X, Y). They are arranged in parallel at predetermined intervals so as to extend in a direction (column direction) orthogonal to the row electrode pair (X, Y) at the opposing positions.

  A white column electrode protective layer (dielectric layer) 7 covering the column electrode D is further formed on the display side surface of the rear glass substrate 6, and a partition wall 8 is formed on the column electrode protective layer 7. Has been.

  The partition wall 8 includes a pair of horizontal walls 8A extending in the row direction at positions facing the bus electrodes Xb and Yb of each row electrode pair (X, Y), and a pair of horizontal walls 8A at an intermediate position between adjacent column electrodes D. The vertical walls 8B extending in the column direction are formed in a substantially ladder shape, and each partition wall 8 sandwiches a gap SL extending in the row direction between the adjacent side walls 8A of the other adjacent partition walls 8 facing each other back to back. And they are arranged side by side in the column direction.

  The ladder-shaped partition wall 8 causes the discharge space S between the front glass substrate 1 and the rear glass substrate 6 to face the transparent electrodes Xa and Ya that are paired with each other in each row electrode pair (X, Y). Each discharge cell C formed in the portion is divided into squares.

  A phosphor layer 9 is formed on the side surfaces of the horizontal and vertical walls 8A and 8B of the partition wall 8 facing the discharge space S and the surface of the column electrode protective layer 7 so as to cover all of these five surfaces. The color of the body layer 9 is arranged so that the three primary colors of red, green, and blue are arranged in order in the row direction for each discharge cell C.

  The raised dielectric layer 3A is formed only on the portion of the crystalline magnesium oxide layer 5 (or the portion where the crystalline magnesium oxide layer 5 faces the discharge cell C on the back surface of the thin-film magnesium oxide layer 4) covering the raised dielectric layer 3A. In this case, the thin-film magnesium oxide layer 4) is brought into contact with the display side surface of the lateral wall 8A of the partition wall 8 (see FIG. 2), thereby closing the space between the discharge cell C and the gap SL. However, it is not in contact with the display side surface of the vertical wall 8B (see FIG. 3), and a gap r is formed between them, and the discharge cells C adjacent in the row direction are mutually connected via this gap r. It is communicated.

  In the discharge space S, a discharge gas containing xenon gas is enclosed.

  The crystalline magnesium oxide layer 5 is composed of the thin-film magnesium oxide layer 4 in which the magnesium oxide crystal as described above covers the dielectric layer 3 and the raised dielectric layer 3A by a method such as spraying or electrostatic coating. It is formed by being attached to the surface on the back side.

  In this embodiment, the thin film magnesium oxide layer 4 is formed on the back surface of the dielectric layer 3 and the raised dielectric layer 3A, and the crystalline magnesium oxide layer 5 is formed on the back surface of the thin film magnesium oxide layer 4. As will be described, after the crystalline magnesium oxide layer 5 is formed on the back surface of the dielectric layer 3 and the raised dielectric layer 3A, the thin film magnesium oxide layer 4 is formed on the back surface of the crystalline magnesium oxide layer 5. May be.

  In FIG. 4, a thin film magnesium oxide layer 4 is formed on the back surface of the dielectric layer 3, and a magnesium oxide crystal is attached to the back surface of the thin film magnesium oxide layer 4 by a method such as spraying or electrostatic coating. The state in which the magnesium oxide layer 5 is formed is shown.

  Further, FIG. 5 shows that after the magnesium oxide crystal is attached to the back surface of the dielectric layer 3 by a method such as a spray method or an electrostatic coating method to form the crystalline magnesium oxide layer 5, the thin-film magnesium oxide layer 4 is formed. It shows the state being done.

  The crystalline magnesium oxide layer 5 of the PDP is formed by the following materials and methods.

  That is, a magnesium oxide crystal that emits CL having a peak within a wavelength range of 200 to 300 nm (particularly within a range of 230 to 250 nm and around 235 nm) by being excited by an electron beam that is a material for forming the crystalline magnesium oxide layer 5; Includes, for example, a magnesium single crystal obtained by vapor-phase oxidation of magnesium vapor generated by heating magnesium (hereinafter, this magnesium single crystal is referred to as a vapor-phase magnesium oxide single crystal). Examples of the phase magnesium oxide single crystal include a magnesium oxide single crystal having a cubic single crystal structure as shown in the SEM photograph image of FIG. 6 and a cube as shown in the SEM photograph image of FIG. Magnesium oxide single crystal having a structure in which the crystal bodies are fitted to each other (that is, a cubic multiple crystal structure) It is included.

  As the magnesium oxide crystal forming the crystalline magnesium oxide layer 5, the crystal powder having a particle size distribution larger than a predetermined size is used by removing the crystal powder having a small particle size by classification. .

  FIG. 8 shows the particle size distribution of the magnesium oxide crystal powder before and after classification on a volume basis. In the figure, a represents the particle size distribution before classification, and b represents the particle size distribution after classification. ing.

  In FIG. 8, for the magnesium oxide crystal powder having a particle size of 0.7 μm or less, the particle size distribution was 31.6% before classification, whereas it was 14.8% after classification. For the magnesium oxide crystal powder having a diameter of 1.0 μm or more, the particle size distribution was 50% before classification, whereas it was 70% after classification.

  The magnesium oxide crystal forming the crystalline magnesium oxide layer 5 has, on a volume basis, a particle size distribution of a crystal powder having a particle size of 0.7 μm or less of 25% or less and a particle size of a crystal powder having a particle size of 1.0 μm or more. It is desirable to use a distribution having a distribution of 55% or more.

  The classification of the magnesium oxide crystal powder is performed using, for example, a powder classifier.

  The particle size (DBET) of the magnesium oxide crystal forming the crystalline magnesium oxide layer 5 is calculated by the following formula from the BET specific surface area (s) measured by the nitrogen adsorption method.

DBET = A / s × ρ
A: Shape counting (A = 6)
ρ: True density of magnesium

  In addition, about the synthesis | combination of a gaseous-phase magnesium oxide single crystal, "Materials" November 1987 issue, 36th volume, No. 410, pp. 1157 to 1161, "Synthesis and properties of magnesia powder by vapor phase method" Etc. are described.

  As described above, the crystalline magnesium oxide layer 5 is formed by adhering a magnesium oxide crystal to the surface of the dielectric layer 3 by a method such as spraying or electrostatic coating.

  The crystalline magnesium oxide layer 5 is formed by applying a paste containing magnesium oxide crystal powder by a screen printing method, an offset printing method, a dispenser method, an ink jet method, a roll coating method or the like. Alternatively, a paste containing a magnesium oxide crystal may be applied to a support film and then dried to form a film, which may be laminated on a thin magnesium oxide layer.

  As will be described later, the magnesium oxide crystal contributes to improvement of discharge characteristics such as reduction of discharge delay.

  In particular, the vapor-phase magnesium oxide single crystal has characteristics such as high purity, fine particles, and less aggregation of particles as compared with magnesium oxide obtained by other methods.

  In the PDP, reset discharge, address discharge, and sustain discharge for image formation are performed in the discharge cell C.

  Then, when the reset discharge that is performed before the address discharge is generated in the discharge cell C, the priming effect by the reset discharge is sustained for a long time because the crystalline magnesium oxide layer 5 is formed in the discharge cell C. This speeds up the address discharge.

  As shown in FIGS. 9 and 10, the PDP has a crystalline magnesium oxide layer 5 made of, for example, a vapor-phase magnesium oxide single crystal as described above. In addition to the CL emission having a peak at 300 to 400 nm, the gas phase magnesium oxide single crystal having a large particle size contained in the crystalline magnesium oxide layer 5 has a wavelength range of 200 to 300 nm (in particular, 230 to 250 nm, 235 nm). CL emission having a peak in the vicinity) is excited.

  The CL emission having a peak at 235 nm is not excited from a magnesium oxide layer (thin film magnesium oxide layer 4 in this embodiment) formed by a normal vapor deposition method as shown in FIG. Only CL emission with a peak is excited.

  Further, as can be seen from FIGS. 9 and 10, CL emission having a peak within a wavelength range of 200 to 300 nm (particularly within 230 to 250 nm, around 235 nm) increases as the particle size of the vapor-phase magnesium oxide single crystal increases. The peak intensity increases.

  The presence of CL emission having a peak in this wavelength range of 200 to 300 nm is presumed to further improve the discharge characteristics (decrease in discharge delay and increase in discharge probability).

  That is, the improvement of the discharge characteristics by the crystalline magnesium oxide layer 5 is that the vapor-phase magnesium oxide single crystal that performs CL emission having a peak in the wavelength range of 200 to 300 nm (particularly in the range of 230 to 250 nm, around 235 nm) It has an energy level corresponding to the peak wavelength, and can trap electrons for a long time (several milliseconds or more) by the energy level. By extracting the electrons by an electric field, initial electrons necessary for starting discharge are generated. It is presumed that this will be done.

  And the improvement effect of the discharge characteristics by this vapor phase magnesium oxide single crystal increases as the intensity of CL emission having a peak in the wavelength range of 200 to 300 nm (especially in the range of 230 to 250 nm, around 235 nm) increases. This is because there is also a correlation between the CL emission intensity and the particle size of the vapor-phase magnesium oxide single crystal.

  That is, when a vapor-phase magnesium oxide single crystal having a large particle size is to be formed, it is necessary to increase the heating temperature when generating the magnesium vapor. As the temperature difference between the flame and the surroundings increases, the vapor phase magnesium oxide single crystal having a larger particle size has a CL emission peak wavelength as described above (for example, within 230 to 250 nm, around 235 nm). It is thought that many corresponding energy levels are formed.

  In addition, the vapor phase magnesium oxide single crystal having a cubic multiple crystal structure includes many crystal plane defects, and it is assumed that the presence of the plane defect energy level contributes to the improvement of the discharge probability.

  FIG. 12 is a graph showing a comparison of CL strengths when the magnesium oxide crystal powder is classified and when it is not classified.

  In FIG. 12, c represents the peak intensity of CL emission excited by electron beam irradiation from a magnesium oxide crystal powder having an average particle size before classification of 3500 angstroms, and d represents the average particle after classification. The peak intensity of CL emission excited from a magnesium oxide crystal powder having a diameter of 5000 angstroms or more is shown.

  From FIG. 12, it is understood that the peak intensity of CL emission is increased about 1.5 times by classifying the powder of the magnesium oxide crystal.

  FIG. 13 is a graph showing the correlation between the CL emission intensity and the discharge delay.

  From FIG. 13, it can be seen that the CL emission of 235 nm excited from the crystalline magnesium oxide layer 5 shortens the discharge delay in the PDP. Further, the stronger the emission intensity of CL at 235 nm, the shorter the discharge delay. I understand that

  As a result, as described above, the PDP is formed by the magnesium oxide crystal powder having a predetermined particle size distribution in which the crystal magnesium oxide layer 5 is removed from the crystal powder having a small particle size by classification. As a result, the discharge delay in the PDP is greatly improved.

  The reason why the discharge delay of the PDP is greatly improved by the classification of the magnesium oxide crystal powder is as follows.

  That is, in the magnesium oxide crystal powder, there is a certain proportion of particles that do not emit CL light having a peak wavelength in the vicinity of 235 nm. Is formed in the crystalline magnesium oxide layer, there is a region where there are many particles that do not emit CL light having a peak wavelength near 235 nm. As a result, the magnitude of the discharge delay on the panel surface is increased. In addition, variations will occur.

  By classification, particles that do not emit CL light having a peak wavelength near 235 nm contained in the powder of magnesium oxide crystal are removed, and a panel is formed by the magnesium oxide crystal that emits CL light having a peak wavelength near 235 nm. Since the crystalline magnesium oxide layer is uniformly formed along the surface, variations in the discharge delay on the panel surface are reduced, and the discharge delay of the PDP is greatly improved.

  Furthermore, since the classified magnesium oxide crystal powder has a larger proportion of the particle size distribution of the crystal having a large particle size, a crystalline magnesium oxide layer is formed by the classified magnesium oxide crystal powder. Compared with the case where the crystalline magnesium oxide layer is formed by the unclassified magnesium oxide crystal powder, the amount of the magnesium oxide crystal powder is small, and as a result, it is generated in the discharge cell. Visible light transmittance is increased, and luminous efficiency is improved.

Furthermore, since the classified magnesium oxide crystal powder has a large proportion of the particle size distribution of the crystal having a large particle size, the total surface area of the crystal powder forming the crystalline magnesium oxide layer is reduced (for example, the particle size is When the crystalline magnesium oxide layer is formed by an unclassified crystalline powder of 3000 angstroms, the total BET surface area is 5.6 m ² / g, whereas the classified granular powder is 5600 angstroms of crystalline powder. When the crystalline magnesium oxide layer is formed, the total BET surface area is about one-half of 3.0 m ² / g), which results in a relative decrease in the discharge gas adsorption, resulting in classification. The reliability of the PDP can be improved by forming the crystalline magnesium oxide layer with the powdered magnesium oxide crystal.

  FIG. 14 shows a case where the crystalline magnesium oxide layer is formed by magnesium oxide crystal powder before classification (graph e), a case where it is formed by magnesium oxide crystal powder after classification (graph f), and a thin film. It is a graph which shows the dispersion | variation in the discharge delay in the panel surface of each PDP in the case of using only a magnesium oxide layer (graph g).

  In FIG. 14, the horizontal axis of the graph indicates the cell position in the row direction within the panel surface.

  From FIG. 14, by providing the crystalline magnesium oxide layer formed of the magnesium oxide crystal, the discharge delay in the PDP is reduced to about one-fifth compared with the case where only the thin magnesium oxide layer is formed. Furthermore, by classifying the magnesium oxide crystal powder forming the crystalline magnesium oxide layer, the discharge delay is further improved as compared with the case where the powder is not classified, and the panel surface of the discharge delay It can be seen that the variation in is reduced.

  In FIG. 14, the discharge delay variation (σ) when only the thin magnesium oxide layer is formed on the PDP is σ = 0.181 μs, and the crystal formed by the magnesium oxide crystal powder before classification When a magnesium oxide layer is provided, σ = 0.041 μs, and when a crystalline magnesium oxide layer formed by classified magnesium oxide crystal powder is provided, σ = 0.015 μs. It is.

  FIG. 15 shows a case where the PDP has a two-layer structure of a thin film magnesium oxide layer 4 and a crystalline magnesium oxide layer 5 as shown in FIGS. 1 to 3 (graph h), and a conventional PDP by a vapor deposition method. It is the graph which compared the discharge delay characteristic when only the formed magnesium oxide layer is formed (graph i).

  As can be seen from FIG. 15, since the PDP has the two-layer structure of the thin-film magnesium oxide layer 4 and the crystalline magnesium oxide layer 5, the discharge delay characteristic is only the thin-film magnesium oxide layer formed by the conventional vapor deposition method. It can be seen that it is remarkably improved as compared with the PDP provided with.

  As described above, the PDP is classified with a magnesium oxide crystal powder that emits CL light having a peak in a wavelength range of 200 to 300 nm when excited by an electron beam. A conventional thin-film magnesium oxide layer in which a crystalline magnesium oxide layer 5 formed of a magnesium oxide crystal powder having a particle size distribution in which a predetermined amount or more of the crystal is contained on a volume basis is formed by vapor deposition or the like 4, the discharge characteristics such as the discharge delay are greatly improved, the discharge characteristics such as the discharge delay can be provided, and the variation of the discharge delay on the panel surface can be greatly reduced. In addition, the luminous efficiency can be improved.

  As described above, the crystalline magnesium oxide layer 5 is not necessarily formed so as to cover the entire surface of the thin-film magnesium oxide layer 4. For example, the portions of the row electrodes X and Y facing the transparent electrodes Xa and Ya, or conversely transparent It may be formed by partially patterning, such as a portion other than the portion facing the electrodes Xa and Ya.

  When this crystalline magnesium oxide layer 5 is partially formed, the area ratio of the crystalline magnesium oxide layer 5 to the thin-film magnesium oxide layer 4 is set to 0.1 to 85 percent, for example.

  Further, in the above description, a PDP having a two-layer structure in which the crystalline magnesium oxide layer 5 is laminated on the thin magnesium oxide layer 4 has been described. However, as shown in FIG. Only the crystalline magnesium oxide layer 5 may be formed as a single layer.

  In the above description, the example in which the crystalline magnesium oxide layer 5 is formed on the dielectric layer 3 has been described. As shown in FIG. 17, the discharge cell has a sustain discharge for light emission. In the PDP having a cell structure divided into two discharge regions, a display discharge cell C1 in which address discharge is performed and an address discharge cell C2 in which address discharge is performed to select the display discharge cell C1 in which light emission is performed. A crystalline magnesium oxide layer 15 formed of classified magnesium oxide crystal powder similar to the above may be disposed in C2.

  In this case, the crystalline magnesium oxide layer 15 is formed in the address discharge cell C2 by a screen printing method, a dispenser method, or the like using a paste containing magnesium oxide crystal powder.

  In FIG. 17, X1 and Y1 are row electrodes, 18 is a discharge cell and a partition partitioning the discharge cell into a display discharge cell C1 and an address discharge cell C2, and in addition to the PDP shown in FIGS. The same code | symbol is attached | subjected about the same component.

  In the above, an example in which the present invention is applied to a reflective AC PDP in which row electrode pairs are formed on a front glass substrate and covered with a dielectric layer, and a phosphor layer and a column electrode are formed on the back glass substrate side will be described. Although the present invention has been carried out, the present invention provides a reflective AC PDP in which row electrode pairs and column electrodes are formed on the front glass substrate side and covered with a dielectric layer, and a phosphor layer is formed on the rear glass substrate side, and a front glass substrate. A transmissive AC PDP in which a phosphor layer is formed on the side and a row electrode pair and a column electrode are formed on the back glass substrate side and covered with a dielectric layer; a discharge cell is formed at the intersection of the row electrode pair and the column electrode in the discharge space The present invention can be applied to various types of PDPs such as a three-electrode AC PDP formed and a two-electrode AC PDP in which a discharge cell is formed at the intersection of a row electrode and a column electrode in a discharge space.

It is a front view which shows the Example of embodiment of this invention. It is sectional drawing in the VV line of FIG. It is sectional drawing in the WW line of FIG. It is sectional drawing which shows the state in which the crystalline magnesium oxide layer is formed on the thin film magnesium layer in the Example. It is sectional drawing which shows the state in which the thin film magnesium layer is formed on the crystalline magnesium oxide layer in the Example. It is a figure which shows the SEM photograph image of the magnesium oxide single crystal which has a cubic single crystal structure. It is a figure which shows the SEM photograph image of the magnesium oxide single crystal which has a cubic multiple crystal structure. It is a graph which shows the particle size distribution of the magnesium oxide crystal powder before classification and after classification. It is a graph which shows the relationship between the particle size of a magnesium oxide single crystal body, and the wavelength of CL light emission in the Example. It is a graph which shows the relationship between the particle size of a magnesium oxide single crystal body and the intensity | strength of CL light emission of 235 nm in the Example. It is a graph which shows the state of the wavelength of CL light emission from the magnesium oxide layer by a vapor deposition method. It is a graph which shows the comparison of CL intensity | strength of the magnesium oxide crystal body before classification and after classification. It is a graph which shows the relationship between the peak intensity of CL light emission of 235 nm from a magnesium oxide single crystal body, and discharge delay. It is a graph which shows the comparison of the dispersion | variation in discharge delay. It is a figure which shows the comparison of the discharge delay characteristic with the case where the protective layer is comprised only by the magnesium oxide layer by a vapor deposition method, and the case where it has the double layer structure of the crystalline magnesium layer and the thin film magnesium layer by a vapor deposition method. It is sectional drawing which shows the state in which the crystalline magnesium oxide layer is formed with the single layer. It is sectional drawing which shows the other example in which the crystalline magnesium oxide layer is formed in the address discharge cell.

Explanation of symbols

1 ... Front glass substrate (front substrate)
3 ... Dielectric layer 4 ... Thin-film magnesium oxide layer 5, 15 ... Crystalline magnesium oxide layer 6 ... Back glass substrate (back substrate)
7: Column electrode protective layer C: Discharge cell
C1 ... Display discharge cell C2 ... Address discharge cell X, Y ... Row electrode (discharge electrode)
D: Column electrode (discharge electrode)

Claims (9)

Front and rear substrates facing each other through a discharge space, a plurality of row electrode pairs between the front substrate and the rear substrate, and each intersection portion of the row electrode pairs extending in a direction intersecting the row electrode pairs In the plasma display panel provided with a plurality of column electrodes each forming a unit light emitting region in the discharge space of
A unit between the front substrate and the back substrate is a magnesium oxide layer including a crystal powder selected from magnesium oxide crystals that are excited by an electron beam and emit cathode luminescence having a peak in a wavelength range of 200 to 300 nm. A plasma display panel provided on a portion facing a light emitting region.   The plasma display panel according to claim 1, wherein the magnesium oxide crystal is selected by classification.   The plasma display panel according to claim 1, wherein the magnesium oxide crystal emits cathode luminescence having a peak at 230 to 250 nm.   The plasma display panel according to claim 1, wherein the magnesium oxide crystal is generated by a gas phase oxidation method.   The plasma display panel according to claim 1, wherein the magnesium oxide crystal is a magnesium oxide single crystal having a cubic single crystal structure. The plasma display panel according to claim 1, wherein the magnesium oxide crystal is a magnesium oxide single crystal having a cubic multiple crystal structure.   The plasma display panel according to claim 1, wherein a thin film magnesium oxide layer is formed on a dielectric layer formed on the front substrate, and the magnesium oxide layer is formed on the thin film magnesium oxide layer. A front substrate and a rear substrate facing each other through the discharge space; a row electrode pair and a column electrode which are disposed between the front substrate and the rear substrate and each form a unit light emitting region in a discharge space at a portion intersecting each other; A method for manufacturing a plasma display panel, comprising: a dielectric layer covering electrode pairs; and a magnesium oxide layer formed in a portion facing the discharge space,
In the step of forming the magnesium oxide layer, a step of selecting a magnesium oxide crystal that performs cathodoluminescence emission having a peak in a wavelength range of 200 to 300 nm when excited by an electron beam, and a selected crystal powder The manufacturing method of the plasma display panel characterized by including the process of forming the crystalline magnesium oxide layer containing this.   9. The plasma display according to claim 8, comprising a step of forming a thin film magnesium oxide layer on the dielectric layer by vapor deposition or sputtering, and a step of forming the crystalline magnesium oxide layer on the thin film magnesium oxide layer. Panel manufacturing method.