JP2009129840A - Plasma display panel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display panel and its manufacturing method capable of showing excellent image display performance even though attempting microfabrication of a discharge cell structure and expecting manufacturing with good yield. <P>SOLUTION: A protection layer 14 and a crystal particle layer 15 made of MgO particulate are arranged on a front substrate 11 of the plasma display panel 1, and dome-shaped phosphor layers 17R, 17G, and 17B having external appearances of half-elliptical globular shapes so as to involve gaps 16 are arranged on ranges corresponding to respective discharge cells C on the surface of the crystal particle layer 15. Furthermore, a crystal 160 of zinc oxide having a shape extending needle-shaped sections 162 from the body center 161 of an equilateral tetrahedron to the four vertex directions is arranged on each gap 16, and the height in the panel direction of the gap 160 is set up as about 30 μm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a plasma display panel, and more particularly to a structure of a phosphor layer.

A plasma display panel (hereinafter simply referred to as “PDP”) is a video display device that is widely used in the television field and the like. There are a direct current (DC) type and an alternating current (AC) type of PDP, and the AC type is known to be suitable for high-speed driving and large screen, and has become mainstream.
FIG. 5A is a developed perspective view of a PDP 900 having a general AC type configuration. The PDP 900 shown in the figure includes a display electrode pair 912 composed of a scan electrode 912a and a sustain electrode 912b disposed on a front substrate 911, with a front panel 910 and a rear panel 1020 arranged opposite to each other with a discharge space 930, and a rear surface. The data electrode 922 disposed on the substrate 921 is arranged to intersect. Discharge cells are formed corresponding to the intersecting regions of the electrodes, and the discharge space 930 for each discharge cell is divided into a matrix by partition walls 924 on the dielectric layer 923.

When the PDP 900 is driven, a voltage is applied to the display electrode pair 912 in each discharge space 930, and a discharge due to ultraviolet rays is generated in the discharge space 930. The ultraviolet rays are applied to the phosphor layer 925 (925R to 925B) disposed in the discharge cell 930, thereby generating visible light, and the visible light is emitted to the front panel 910 side.
The AC type PDP is required to improve display performance every day in response to market demands for higher definition and the like. In order to achieve high definition, it is necessary to increase the number of electrodes and accordingly increase the number of discharge spaces 930 divided for each discharge cell. Here, FIG. 5B shows a cross-sectional view of the virtual plane A of the PDP 900. As those figures, if the panel size is achieved higher definition at the same, each of the discharge spaces 930 depending on which is miniaturized, the pitch size W _C is also small. In proportion to the miniaturization, the formation region of the formation region and the data electrodes 922 of the partition 924 is to overlap in the thickness direction of the panel (in the figure, the length of W _a is 0 or less, the data electrode width W state partition wall width _{W R} overlap with respect to _D). When this superposition occurs, distortion of the electrical density distribution in the discharge space 930 is caused when a voltage is applied using the data electrode 922, so that the voltage characteristics of the panel vary. In addition, since the discharge area becomes smaller as the discharge cell becomes smaller, the light emission efficiency is lowered, and the discharge voltage may increase due to the lack of wall charges.

As a technique for improving these, a ZnO (zinc oxide) crystal body in which needle-shaped portions extend from the body center of the regular tetrahedron to the four vertex directions on the surface of the front substrate 911 or the back substrate 921 is disposed. A PDP that promotes the generation of a discharge by locally generating a high electric field at the tip of a crystal has been proposed (for example, Patent Document 1).
Further, Patent Document 2 discloses a flat display device having a configuration in which light-emitting elements composed of an insulator having voids and a porous light emitter containing inorganic phosphor particles are two-dimensionally arranged in a matrix. In order to form a porous phosphor, an inorganic phosphor particle is mixed with a ZnO tetrahedral crystal having a so-called tetrapod shape in which four needle-shaped portions extend from the body center at equal intervals. Examples are also disclosed.
JP 2007-103150 A JP 2004-200143 A

However, even if any of the above prior arts is used, the following problem may occur with respect to the performance display performance due to further miniaturization of the discharge space.
That is, in general, in the PDP, it is necessary to align the barrier rib and the rear panel on which the phosphor layer is formed with respect to the front panel on which the display electrodes are formed in the sealing process. Alignment is required. However, the accuracy of aligning different panels is naturally limited, and the position of the display electrode pair is inevitably displaced with respect to the barrier ribs and the phosphor layer in the sealing process. This problem becomes conspicuous with the miniaturization of the discharge cell, and is particularly problematic when the display electrode is formed as a structure having a protrusion or a fence electrode.

  On the other hand, according to a general method for forming barrier ribs, a certain amount of formation error occurs, so that the formation error cannot be ignored as the discharge space becomes smaller. This increases the difficulty of accurately forming the partition walls at fine intervals. If the barrier rib formation error is not improved sufficiently, the barrier ribs cannot be formed accurately due to the error in proportion to the miniaturization of the discharge space, and the variation in display performance among the discharge cells increases. Specifically, the light emission efficiency of the actual PDP is lower than the light emission efficiency required by design. This tendency increases in proportion to the number of dividing the discharge space (the number of fine cells), and causes a deterioration in image display performance that should be obtained in a high-definition PDP.

In addition, when the conventional technique of Patent Document 2 is used, although the luminance is improved as compared with the conventional AC type PDP as shown in FIG. 4, the discharge voltage is increased. In addition, the burden on the phosphor is larger than that of the conventional AC type PDP, and there is a possibility that the operation reliability is lowered.
As described above, there is still room to be solved in the field of PDP.
The present invention has been made in view of the above problems, and it is possible to achieve excellent image display performance even if the discharge cell structure is miniaturized, and to provide a PDP that can be expected to be manufactured with a high yield and a method for manufacturing the PDP. For the purpose of provision.

In order to solve the above problems, the present invention provides a PDP having a pair of panels arranged opposite to each other, and a dome-shaped phosphor layer is formed on the main surface of the other panel facing the one panel. In addition, a gap for electric discharge is provided between the dome-shaped phosphor layer and the panel lower layer surface covered with the dome-shaped phosphor layer.
Here, on the main surface side of the other panel, an electrode, a dielectric layer covering the electrode, and a protective layer covering the dielectric layer are sequentially formed, and the dome-shaped phosphor layer is It can also be set as the structure formed in the several position on a protective layer.

Alternatively, an electrode, a dielectric layer covering the electrode, a protective layer covering the dielectric layer, and a crystal particle layer including magnesium oxide crystal particle groups are sequentially formed on the main surface side of the other panel. The dome-shaped phosphor layer may be formed at a plurality of positions on the crystal particle layer.
Each of the voids has at least one tetrahedral crystal formed by extending needle-shaped portions in the direction of four apexes from the body center of the regular tetrahedron, or at least one crystal of a fiber crystal. It can also be set as the installed structure.

Specifically, the crystal body can be composed of ZnO as a main component, and can impart semiconductor characteristics to the crystal body. In this case, a semiconductor crystal formed by adding Ga to the main component ZnO is also possible.
Furthermore, when the tetrahedral crystal is used, the distance between the vertices can be 10 μm or more and 50 μm or less. Moreover, the diameter of the tip part of the acicular part in the tetrahedral crystal may be 1 nm or more and 50 nm or less.

  On the other hand, when the fiber crystal is used, the length of one fiber can be 10 μm or more and 50 μm or less. Moreover, the said fiber type crystal body can also be set as the structure which consists of a columnar core part and the sharp part provided in the end of the said core part. In this case, the diameter of the core part may be 1 μm or more and 5 μm or less, and the diameter of the sharp part may be 1 nm or more and 50 nm or less.

Further, in the voids, the remaining space excluding the space occupied by the crystal can be in the range of 50% or more and 90% or less of the total volume of the voids.
Further, at least one of the pair of panels may be provided with a support member for securing a gap with the other panel.
Further, a plurality of discharge cells may be disposed on the pair of substrates along the horizontal direction of the screen, and a pitch between adjacent discharge cells in the horizontal direction may be 50 μm or more and 160 μm or less. .

  The present invention also provides a first substrate forming step of forming a dielectric layer and a protective layer so as to cover the main surface of the first substrate on which the electrode is disposed, and the formed first substrate is a second substrate. A method of manufacturing a PDP that includes a sealing step in which a substrate is bonded to face the substrate, wherein a crystal-dispersed material in which crystals are dispersed is partially formed on the surface of a protective layer between the first substrate forming step and the sealing step. A crystal material material disposing step, a phosphor material disposing step of disposing a phosphor material on the crystal dispersion material, heating the crystal dispersive material and the phosphor material, The body layer was formed and the organic component of the pre-crystal dispersion material was removed, followed by a firing step for forming a gap between the protective layer and the phosphor layer.

  Furthermore, the present invention provides a first substrate forming step of forming a dielectric layer and a protective layer so as to cover the main surface of the first substrate on which the electrodes are disposed, and the formed first substrate is a second substrate. A method of manufacturing a PDP that is arranged to face a substrate, wherein a crystal particle material disposing step of disposing a fine particle dispersed material in which magnesium oxide fine particles are dispersed on a surface of a protective layer between a first substrate forming step and a sealing step A crystal material disposing step of partially disposing a crystal disperse material in which a crystal is dispersed on a fine particle disperse material; and a phosphor material disposition of disposing a phosphor material on the crystal disperse material. Firing the disposed crystal dispersion material and the phosphor material, forming a phosphor layer, and removing an organic component of the crystal dispersion material, thereby forming a crystal particle layer and a phosphor layer. And a firing step for forming voids therebetween.

Here, in at least one of the crystalline material arranging step and the phosphor material arranging step, the arranged material can be solidified.
In the crystal particle disposing step, the disposed material can be solidified.
Further, in the firing step, the first substrate can be fired at 480 ° C. or higher.
In the crystal particle material disposing step, the crystal material disposing step, and the phosphor material disposing step, materials containing the same medium can be used.

Further, in the phosphor arranging step, the phosphor material can be arranged on the crystal dispersion material using an ink jet method.
In the phosphor arranging step, a phosphor having a center particle size of 1 μm or more and 2 μm or less can be used.

  In the PDP according to the present invention, an electrode and a dielectric layer are disposed on one of a pair of substrates, and a phosphor layer is formed on the surface of the substrate so as to include a void serving as a main discharge space. To do. Accordingly, since the electrodes and the phosphor layer can be aligned on one substrate, the rear panel on which the barrier ribs and the phosphor layer are formed is bonded to the front panel on which the display electrodes are formed as in the past. However, high-precision alignment is not required.

  Therefore, according to the present invention, even if the discharge space is further miniaturized by miniaturization of the discharge cell structure, it is not necessary to align the electrode and the phosphor layer between different substrates. Even when the electrode is a display electrode having a structure having a protruding portion or a fence electrode structure, the positional deviation between the electrode and the phosphor layer can be made extremely small as compared with the conventional configuration. Accordingly, it is possible to avoid a decrease in light emission efficiency and a deterioration in image display performance due to the positional shift. Specifically, the phosphor layer for each pixel can be reliably formed even in a very small high-definition panel having a cell pitch of about 50 μm, for example. Note that in the case of a cell having a cell pitch larger than 160 μm, pixel defects can be formed with a relatively small amount even with the structure of the conventional example. Therefore, the present invention is further improved in a discharge cell size having a cell pitch of 50 μm to 160 μm. It is effective.

Further, since the barrier ribs are unnecessary in the PDP of the present invention, the problem of barrier rib formation errors accompanying the miniaturization of discharge cells can be fundamentally avoided, and the yield reduction can be drastically improved. .
If a tetrahedral crystal or fiber crystal is used to form the void, the phosphor layer can be favorably supported from the inside of the void, and a good phosphor layer and void can be ensured at the time of manufacture. Obtainable. Further, if these crystal bodies are made of a material containing ZnO as a main component, an effect of emitting electrons by an electric field generated by applying a voltage to the electrodes can be obtained. As a result, the discharge starts at a lower voltage and the discharge sustaining voltage is reduced. Further, for example, if Ga is added to ZnO to impart semiconductor characteristics to the crystal, more electrons are emitted at a lower voltage, and the discharge sustaining voltage is further reduced. Further, the diameter of the tip of the tetrahedral crystal is set to 1 nm or more and 50 nm or less, or the fiber crystal is composed of a core and a sharp part, and the diameter of the core is 1 μm or more and 5 μm or less. If the diameter is 1 nm or more and 50 nm or less, the electric field can be concentrated on the tip or sharp part of the crystal when the PDP is driven. As a result, discharge is likely to occur in the gap, and the start discharge voltage can be effectively suppressed to reduce the discharge sustain voltage. In addition, since the ZnO crystal is transparent and does not block visible light emission, it is an optimal material for maintaining the light emission luminance.

If the void ratio of the voids is 90% or less, the phosphor layer can be stably supported by the crystal, and the void height (panel thickness direction height) can be secured well. Further, if the porosity is 50% or more, a sufficient space for discharge can be secured, and an increase in discharge voltage due to the porosity being too small can be prevented.
Furthermore, in the present invention, if the phosphor layer is formed on the surface of the protective layer, it is possible to start discharge favorably by receiving the abundant secondary electron emission effect of the protective layer at the time of driving, and an improvement in discharge delay is expected. it can. Furthermore, if a crystal particle layer composed of magnesium oxide crystal particles is formed on the surface of the protective layer, a secondary electron emission effect can be obtained, and a further improvement in light emission efficiency can be expected along with a significant improvement in discharge delay.

  In the PDP according to the present invention, if at least one of the pair of substrates is provided with a support member that secures the space so as to be in contact with the other substrate, the pressure of the discharge space and the atmospheric pressure It is possible to prevent the two substrates from being deformed due to the difference between them and the voids, the phosphor layers, etc. from being destroyed. Here, in the present invention, since the partition walls for partitioning the discharge cells are unnecessary, it is not necessary to provide a support member for each cell of each color in the form of a matrix or stripe like the partition walls of the conventional configuration.

On the other hand, in the manufacturing method according to the present invention, in addition to the electrode, dielectric layer and protective layer, or crystal particle layer necessary for surface discharge on one substrate, a void and a phosphor layer are formed together with these. Therefore, high-precision alignment is not required when bonding to the other substrate, and the yield of the manufacturing process is not reduced due to the displacement of the substrate.
At this time, in each step of forming the crystal particle layer, the void, and the phosphor layer, if each layer is solidified once, the layer is formed without deforming or destroying the shape of each layer. The manufacturing efficiency advantage is great.

Further, if the step of baking the substrate is performed before the sealing step of the pair of substrates, a majority of the organic components in the material of the void and the phosphor layer or the crystal particle layer can be removed at once. . For this reason, it can prevent effectively that an organic component remains in a panel, and can avoid the bad influences which an organic component exerts on discharge.
In addition, by using the same medium for the material used for the crystal particle layer, voids, and phosphor layer, the type of gas that is emitted when sealing and exhausting the panel in the firing process and exhaust / sealing process Can be prevented from adversely affecting the discharge.

  Furthermore, if the phosphor material is applied by an ink jet method, a displacement of the arrangement position with respect to each discharge cell and pixel can be prevented, and a highly accurate PDP can be manufactured. Further, if the center particle diameter of the phosphor used at this time is 2 μm or less, clogging when ejected from an inkjet nozzle can be prevented. Furthermore, if the center particle diameter is 1 μm or more, this effect can be further enhanced, and fine cells can be formed satisfactorily, so that a decrease in luminous efficiency due to poor formation can be suppressed as much as possible.

Embodiments and examples of the present invention will be described below, but the present invention is naturally not limited to these forms, and may be appropriately modified and implemented without departing from the technical scope of the present invention. be able to.
1. Overall Configuration of PDP FIG. 1 is an exploded perspective view of a main part of a PDP 1 according to an embodiment of the present invention. In FIG. 1, the PDP 1 is configured such that a front panel 10 and a rear panel 20 are arranged to face each other with the discharge space 3 interposed therebetween, and the panels 10 and 20 are internally sealed in each peripheral region.
(1) Front panel 10
In the front panel 10, a plurality of display electrode pairs 12 are disposed on a front substrate 11, and a dielectric layer 13, a protective layer 14, a crystal particle layer 15, a gap 16, and a phosphor layer 17 (17R) are disposed so as to cover them. , 17G, 17B) are sequentially stacked.

The front substrate 11 is a glass substrate having a thickness of about 2 mm, and is made of, for example, borosilicate alkaline earth glass, soda lime glass, high strain point glass at about 570 ° C., or the like.
The display electrode pair 12 includes a pair of scan electrodes (Scn) and sustain electrodes (Sus) extending in a stripe shape with a main discharge gap G as shown in FIG. It is formed over a pair. In both Scn and Sus, a plurality of pairs of transparent electrodes 121 and 122 are formed in a stripe shape, and bus electrodes 123 and 124 for lowering the resistance of the transparent electrodes 121 and 122 are laminated. The transparent electrodes 121 and 122 are mainly composed of ITO (Indium Tin Oxide), SnO _2, ZnO, or the like, and are set to a thickness example of 0.1 μm and a width of 60 μm, respectively. The bus electrodes 123 and 124 are mainly composed of Ag, and have a thickness of 2 to 10 μm and a width of 35 μm. A configuration without the transparent electrodes 121 and 122 is also applicable. The bus electrodes 123 and 124 may be other than Ag, and may be a thin film (thickness 0.1 to 1.0 μm) mainly composed of copper, aluminum, or the like, or a thin film (thickness 0. 1 to 1.0 μm) is also applicable. The display electrode pair 12 is applied with a voltage from an external drive circuit (not shown) at the time of driving, and contributes as a means for generating discharge in the discharge space 3 to be described later.

The dielectric layer 13 is made of a PbO-based or Bi ₂ O _3- based low-melting glass having a predetermined dielectric constant, and generates a discharge in the discharge space and covers the display electrode pair 12. Provided to protect.
The protective layer 14 is provided in order to protect the dielectric layer 13 from collision of ions mainly caused by discharge during driving. For example, a material mainly composed of MgO, CaO, SrO, BaO or the like is used for a vapor deposition method or the like. Based on this, it is formed with a thickness of about 1.0 μm.

The crystal particle layer 15 is a layer formed by arranging MgO crystal particle groups on the surface of the protective layer, and is a layer that mainly plays a role of emitting secondary electrons to the discharge space during driving.
Next, FIG. 2A is a virtual cross-sectional view of the PDP 1 viewed from the direction AA ′ in FIG. FIG. 2B is a front view of the front panel 10 along the XY plane showing the arrangement of the discharge cells C constituting one pixel. In the figure, the one-dot chain line indicates the boundary of the discharge cell C, the dotted line indicates the position of the transparent electrodes 121 and 122, and the two-dot chain line indicates the position of the bus electrodes 123 and 124, respectively. The discharge cell C shown in the drawing has a size in which the cell pitch in the width (X) direction is W and the cell pitch in the longitudinal (Y) direction is 3 W, and constitutes one square pixel (3W × 3W). The width of the display electrode pair 12 is adjusted so as to be within the cell pitch 3W in the longitudinal direction of each discharge cell C across the main discharge gap G.

In the PDP 1, phosphor layers 17 </ b> R to 17 </ b> B are disposed on the surface of the crystal particle layer 15 corresponding to each discharge cell C as a main characteristic portion.
As shown in FIG. 2 (b), each of the phosphor layers 17R to 17B is in contact with the crystal particle layer 15 with respect to the region of the lower layer surface (surface of the crystal particle layer 15) corresponding to each discharge cell C to be coated. It is configured as a dome shape having a substantially elliptical hemispherical appearance so that the gap 16 can be enclosed between them. The phosphor layers 17R, 17G, and 17B are individually composed of any one of red, green, and blue phosphor materials. When the ultraviolet rays are excited by the discharge generated in the gap 16 during driving, any one of the colors is selected. Of visible light.

The gap 16 included between each of the phosphor layers 17R to 17B and the crystal particle layer 15 coated thereon has a height in the z direction of about 30 μm to 40 μm, and discharge is caused in the gap 16 when the PDP is driven. Occurs and functions as the main discharge space.
The shape of the phosphor layers 17R to 17B is not limited to a substantially semi-elliptical sphere, but may be configured as a dome shape having an appearance other than this, for example, a hemispherical shape or a rectangular parallelepiped shape. Such adjustment of the shape can be appropriately adjusted by setting the shape of the opening of the pattern mask in the printing method at the time of manufacture.

  As shown in FIG. 2A, a plurality of crystal bodies 160 are disposed in the gap 16 mainly as pillars for holding the respective shapes of the phosphor layers 17 </ b> R to 17 </ b> B and the gap 16 during manufacturing. FIG. 3A is an enlarged view showing the configuration of the crystal body 160. The crystal body 160 is a transparent ZnO crystal body (single crystal whisker) having a tetrapod shape in which needle-like portions 162 extend from the tetrahedral body center 161 toward the four apexes. The length of each needle-like portion 162 of the crystal body 160 is 10 to 15 μm, and the distance between the apexes of the regular tetrahedron is 10 μm or more and 50 μm or less.

  In addition, the crystal body 160 put in the space | gap 16 should just support the shape of the fluorescent substance layers 17R-17G at the time of manufacture by this, and should just be one or more pieces. However, if the amount is too small, the above supporting effect cannot be obtained, and conversely if too large, the discharge space in the gap 16 may be reduced. Therefore, the effect of the pillars supporting the phosphor layers 17R to 17B and the securing of the discharge space 3 are likely. From the two surfaces, it is preferable that the porosity (the remaining space excluding the space occupied by the crystal body 160 in the void 16) be in the range of 50% to 90%. By setting the porosity to 90% or less, the height of the gap 16 (the height in the panel thickness direction) can be sufficiently secured. Moreover, an increase in discharge voltage can be prevented by setting the porosity to 50% or more.

(2) Rear panel 20
The back panel 20 is provided with striped data (address) electrodes 22 provided on the back substrate 21, a dielectric layer 23 formed so as to cover each data electrode 22, and provided at predetermined intervals. A rib-shaped support member 24 is formed.
The data electrode 22 is disposed in a direction crossing the display electrode pair 12.

The back substrate 21 is made of a glass material such as borosilicate alkaline earth glass, like the front substrate 11, and has a thickness of about 2 mm.
The data electrode 22 is a strip electrode made of Ag, and has a thickness of 2 to 10 μm and a width of 30 to 40 μm. The data electrode 22 is not only Ag but also a thin film (thickness 0.1 to 1.0 μm) mainly composed of Cu, Al or the like, or a thin film (thickness 0.1 to 1.0 μm) made of a laminated film of Cr / Cu / Cr. ) Etc. are also applicable.

The dielectric layer 23 is a layer made of oxide glass containing ZnO or Bi ₂ O ₃ and having a thickness of 8 to 15 μm, has a predetermined dielectric constant, and covers and protects the data electrode 22. .
Here, the support member 24 is a rib-like member arranged extending in the Y direction, and is formed by sandblasting or photolithography. The support member 24 keeps the distance between the front substrate 11 and the rear substrate 21, and both the substrates 11 and 21 are deformed by atmospheric pressure, or the gap 16 formed in the front panel 10 and the phosphor layers 17 </ b> R to 17 </ b> B. And the like are brought into contact with the main surface of the back panel 20 and are prevented from being broken.

The support member 24 is similar in shape to the partition wall in the conventional PDP, but the conventional partition wall partitions each discharge cell C, and a phosphor layer is formed on the side surface of the support member 24. The support member 24 can be formed regardless of the section of the discharge cell C, and the phosphor layers 17R to 17B can be provided separately without depending on the support member 24.
(3) Discharge space 3
In the discharge space 3 existing in the facing gap between the front panel 10 and the back panel 20, a discharge gas composed of at least one kind of rare gas component of He, Xe and Ne is exhausted so as to be in a high vacuum state. It is sealed at a pressure of 0.0 to 79.8 kPa (150 to 600 Torr). Here, since there are fine gaps between the sintered phosphor particles in the phosphor layers 17R to 17B, the discharge gas also reaches the voids 16 included in the phosphor layers 17R to 17B. Adjust with similar pressure. In order to improve the light emission efficiency in the PDP 1, the Xe content in the discharge gas is preferably 20 to 100% (volume%).

  In the PDP having the above-described configuration 1, at the time of driving, addressing is first performed on the predetermined display electrode pair 12 and the data electrode 22, and then power is supplied to the display electrode pair 12. Then, a sustain discharge is mainly generated in the gap 16 from the surface of the crystal particle layer 15 corresponding to each corresponding display electrode pair 12. The ultraviolet rays generated by the sustain discharge hit the inner walls of the phosphor layers 17R to 17B formed so as to enclose the gap 16, and here, visible light emission of any color of RGB is performed. Visible light is provided from the front panel 10 to external light emission as an image display. In the PDP 1, discharge can occur in the discharge space 3 around the gap 16, but the discharge generated in the gap 16 mainly contributes to visible light emission.

  Here, since the manufacturing process of the PDP 1 is different from the conventional one, it does not have a configuration in which the rear panel on which the phosphor layer is formed is bonded to the front panel, and therefore, there is no need to perform advanced positioning at the time of bonding. Therefore, even if the discharge cell C of the PDP 1 is miniaturized, it is possible to fundamentally avoid the problem that the phosphor layer is displaced with respect to the front panel due to the alignment of both panels.

  In addition, in the PDP 1, it is not necessary to use partition walls for partitioning the discharge cells C, and the support members 24 are spaced at intervals across the plurality of discharge cells C in order to arrange the front panel 10 and the back panel 20 to face each other. Is arranged. Therefore, in the PDP 1, even if the cell pitch width is very small (specifically, when one cell pitch (pitch corresponding to W in FIG. 2) is about 50 μm) in order to achieve high definition, miniaturization is achieved. Therefore, there is no possibility that the phosphor layers 17R to 17B are poorly formed. Therefore, in the present invention, it is possible to prevent formation errors due to such miniaturization and to reliably form the phosphor layers 17R to 17B for each discharge cell.

In the configuration in which the cell pitch in the width direction (horizontal direction) of the discharge cells C is larger than 160 μm, even in the structure as in the conventional example, pixel defects can be formed with relatively few defects. It is more effective when applied to a fine discharge cell structure of 50 μm or more and 160 μm or less.
Further, by putting the crystal body 160 in the gap 16, it is possible to prevent the phosphor layers 17R to 17B from being crushed mainly by external pressure, gravity, or the like during manufacturing, and to maintain the shape of the gap 16 well. Further, since the crystal body 160 made of ZnO is transparent, there is little possibility that the visible light generated in the void 16 is blocked or the light emission efficiency is reduced. In addition, since ZnO has a high melting point of 2000 ° C., stable characteristics can be maintained without being thermally denatured during the production process of PDP. Furthermore, by using the tetrahedral crystal 160, the placement stability in the void 16 is high (anisotropy relaxation effect is high), the electric field is concentrated on the tip of each needle-like portion 162, and discharge is likely to occur. Etc. are also exhibited. Note that each tip portion of the tetrahedral crystal 160 has a sharp shape with a diameter of 1 to 50 nm, and electrons are emitted by a tunnel effect when an electric field is concentrated on the tip portion. Note that if an additive such as Ga is added to ZnO in an amount of about 1 at% with respect to the main component of the crystal body 160 (here, ZnO), the crystal body 160 can be configured as a semiconductor, and the field emission effect can be further enhanced. it can. Furthermore, if the distance between the vertices of the regular tetrahedron is set to 10 μm or more and 50 μm or less, the size of the gap 16 can be set to 10 μm or more and 150 μm or less, and a discharge space capable of exhibiting good luminous efficiency is secured. Can do.

  Although the support member 24 of the PDP 1 has a shape extending in parallel with the address electrodes 22, the support member 24 of the present invention is not limited to such a shape, and the front panel 10 and the back panel 20 are appropriately connected. What is necessary is just to be able to arrange | position, making it arrange | position facing. Therefore, the support member 24 may be provided at least in the peripheral region of both panels 10 and 20. However, when the PDP 1 is large, the front substrate 11 and the rear substrate 21 can be deformed in the thickness direction of the PDP 1 due to a pressure difference. In this case, since the phosphor layers 17R to 17B and the gaps 16 on the front panel 10 may come into contact with the surface of the rear panel and be destroyed, it is desirable to provide the support member 24 also in the panel central region of the PDP 1. .

In addition, the support member 24 may be formed in a matrix shape and partition the discharge cells C as in the conventional barrier rib (for example, FIG. 4). In this case, the support member 24 can more effectively prevent the occurrence of erroneous discharge and optical crosstalk in the Y direction.
On the other hand, when the matrix-like support member 24 is not provided, it is desirable to dispose black stripes that shield light from the discharge space 3 between the adjacent display electrode pairs 12. In this way, the light emission for each discharge cell C can be individually highlighted as in the case where the conventional partition is provided, and excellent image display performance can be expected. Examples of the black stripe material include solid resin such as lead borosilicate glass powder and bismuth / phosphoric acid mixture, and black pigment such as Cr—Mn—Cu pigment and Fe—Co—Cr pigment. Can be used. In addition, as said resin, what dissolved ethyl cellulose in the solvent can be used, for example.

2. About a manufacturing method Hereinafter, an example of the manufacturing method of PDP1 is demonstrated.
(Preparation of front panel 10)
The display electrode pair 12 is produced on the surface of the front substrate 11 made of soda-lime glass having a thickness of about 2.6 mm. Here, an example in which the display electrode pair 12 is formed by a printing method is shown, but other than this, it can be formed by a die coating method, a blade coating method, or the like.

First, a transparent electrode material such as ITO, SnO ₂ , or ZnO is applied on the front substrate 11 in a predetermined pattern with a final thickness of about 100 nm and dried. Thereby, the transparent electrodes 121 and 122 are produced.
On the other hand, a photosensitive paste obtained by mixing a photosensitive resin (photodegradable resin) with Ag powder and an organic vehicle is prepared, and the paste is applied on the transparent electrodes 121 and 122 to form a display electrode. Cover with a mask having a pattern. And it exposes from the said mask, a baking process is carried out at the baking temperature of about 590-600 degreeC through a development process. As a result, bus electrodes 123 and 124 are formed on the transparent electrodes 121 and 122. According to this photomask method, the bus electrodes 123 and 124 can be thinned to a line width of about 30 μm as compared with the screen printing method in which the line width of 100 μm is conventionally limited. As a metal material of the bus electrodes 123 and 124, Pt, Au, Al, Ni, Cr, tin oxide, indium oxide, or the like can be used in addition to Ag. In addition to the above method, the bus electrodes 123 and 124 can also be formed by performing an etching process after forming an electrode material by vapor deposition or sputtering.

Next, a paste in which an organic binder made of lead oxide, bismuth oxide or SiO ₂ dielectric glass powder having a softening point of 550 ° C. to 600 ° C. and butyl carbitol acetate or the like is mixed from above the display electrode pair 12. Apply. Then, baking is performed at about 550 ° C. to 650 ° C. to form the dielectric layer 13 having a final thickness of 2 μm or less.
(Protective layer formation step)
Subsequently, a protective layer 14 having a predetermined thickness is formed on the surface of the dielectric layer 13 by vapor deposition. As the vapor deposition source, for example, pellet-shaped or powder-shaped MgO is used. In an oxygen atmosphere, the deposition source is heated using a piercing electron beam gun as a heating source to form a desired film. Here, the electron beam current amount, the oxygen partial pressure amount, the substrate temperature, and the like at the time of film formation do not have a great influence on the composition of the protective layer 14 after film formation, and may be arbitrarily set. The method for forming the protective layer 14 is not limited to the EB method, and other thin film methods such as a sputtering method and an ion plating method may be used.

Next, the manufacturing method of the crystal particle layer 15, the space | gap 16, and the fluorescent substance layers 17R-17G is demonstrated. The vehicles shown below are prepared in advance so as to include the same medium.
First, a predetermined MgO crystal particle group is prepared and dispersed in a vehicle to prepare a paste-like fine particle dispersion material. This paste is applied to the surface of the protective layer 14 formed by a slit coater or the like to form a substantially uniform film having a wet film thickness of about 10 μm. Thereafter, the mixture is heated in an atmosphere of 80 ° C. for 30 minutes to evaporate about 90% (weight ratio) of the solvent in the vehicle, thereby depriving the fluidity and solidifying.

  Next, a predetermined crystal is prepared as a supporting column means to be introduced into the gap 16. Specifically, a crystal body 160 having ZnO as a main component shown in FIG. 3A and needle crystals 162 extending from the regular tetrahedron body center 161 in the four vertex directions is prepared. The tetrahedral crystal is obtained by oxidizing the surface of Zn fine particles in water and then heating it in an oxidizing atmosphere (Journal of Crystal Growth 102 pp.965-973, 1990), as well as a commercially available tetrahedral crystal. As a body, “Panatetra (registered trademark) WZ-0501” manufactured by Amtec Co., Ltd. can be used.

  The crystal body 160 is dispersed in a vehicle (the viscosity of which is adjusted by dissolving ethyl cellulose or the like in a solvent) to produce a paste-like crystal dispersion material. The mixing ratio of the crystal 160 to the vehicle is suitably 3 to 5% by weight. The paste is printed in a predetermined shape (an elliptical hemisphere shown in FIG. 2B) pattern on the surface of the solidified fine particle dispersion material based on a screen printing method. Here, as shown in FIGS. 2A and 2B, when each of the crystal dispersion materials is provided for each discharge cell C, the cell pitch W is 60 to 70 so as to be contained in each discharge cell C region. % Width. For example, in the case of a fine discharge cell C with W = 95 μm, it is provided with a width of about 60 μm.

Alternatively, each crystal dispersion material can be provided over discharge cells C adjacent in the Y direction. In this case, the phosphor layers 17R to 17B are formed over the adjacent discharge cells C.
When the support member 24 is formed in a matrix, the phosphor layers 17R to 17G can be provided so that the crystal-dispersed material has a rectangular main surface and has a rectangular parallelepiped appearance. After printing the crystal dispersion material, it is heated in an atmosphere of 80 ° C. for 30 minutes to evaporate the solvent in the vehicle by about 90% (weight ratio), thereby depriving the fluidity and solidifying.

  Further, as in the case of the gap 16, the phosphor material is dispersed in the vehicle to produce a paste-like phosphor material. Then, the phosphor material is applied based on an ink jet method so as to cover the surface of the solidified crystal dispersion material. This coating method may be a screen printing method, but in order to produce a high-definition panel as in this example, since the positional deviation between pixels becomes significant during printing, there is an inkjet method with better coating accuracy. desirable.

Examples of each phosphor material to be used include the following.
Red phosphor layer material; (Y, Gd) BO ₃ : Eu
Green phosphor layer material; Zn ₂ SiO ₄ : Mn
Blue phosphor layer material; BaMgAl ₁₀ O ₁₇ : Eu
The center particle diameter of the phosphor particles is preferably 2 μm or less in order to prevent clogging when ejected from an inkjet nozzle, and is preferably 1 μm or more in order to suppress the reduction in the effective efficiency as much as possible. After printing the phosphor material, as in the manufacturing process of the crystal particle layer 15 and the voids 16, it is heated in an atmosphere of 80 ° C. for 30 minutes to evaporate about 90% (weight ratio) of the solvent in the vehicle, thereby flowing. Take away sex and solidify.

It should be noted that the viscosity can be set high depending on how to adjust the fine particle dispersion material, the crystal dispersion material, and the phosphor material. In this case, even if each material is not dried and solidified, it is possible to efficiently apply the materials by overlapping them. Therefore, heating for solidifying each material may not be performed.
Next, a frit glass for sealing is applied to the peripheral area of the back substrate 21. And it raises from room temperature to 480 degreeC in 1 hour, and bakes for 30 minutes, hold | maintaining in a 480 degreeC heating atmosphere.

  By this firing step, the organic components present in the vehicle used for the fine particle dispersed material, the crystal dispersed material and the phosphor material are almost completely volatilized and removed. Here, since the same medium is used for each vehicle, it is possible to prevent the gas generated during firing from being spread over multiple components, and an extremely small amount of organic components remain in the panel to improve the panel performance when driving the PDP. It can suppress adverse effects. The same effect is also exhibited in the following panel sealing process and exhaust stroke.

Thus, the crystal particle layer 15, the void 16, and the phosphor layers 17R to 17B are formed, and the production of the front panel 10 is completed.
(Preparation of the back panel 20)
On the surface of the back substrate 21 made of soda-lime glass having a thickness of about 2.6 mm, a conductive material mainly composed of Ag is applied in a stripe pattern at a predetermined interval by a screen printing method, and a data electrode having a thickness of about 5 μm. 22 is formed. As the electrode material of the data electrode 22, materials such as metals such as Ag, Al, Ni, Pt, Cr, Cu, and Pd, conductive ceramics such as carbides and nitrides of various metals, combinations thereof, or combinations thereof are used. A laminated electrode formed by laminating can also be used as necessary.

Here, in order to set the PDP 1 to, for example, the 40-inch class NTSC standard or VGA standard, the interval between two adjacent data electrodes 22 is set to about 0.4 mm or less.
Subsequently, a glass paste made of lead-based or non-lead-based low-melting-point glass or SiO ₂ material is applied at a thickness of about 20 to 30 μm over the entire surface of the back substrate 21 on which the data electrodes 22 are formed, and is baked. The body layer 23 is formed.

Next, the support member 24 is formed on the surface of the dielectric layer 23. Specifically, a paste of a low-melting glass material is applied and solidified, and then formed by sandblasting, or the material is applied and solidified in a predetermined pattern using a photolithography method.
Thus, the rear panel 10 is completed.
In the above method example, the front substrate 10 and the rear substrate 20 are made of soda lime glass. However, this is given as an example of the material and may be made of other materials.

(PDP completion)
The rear panel 20 is bonded to the manufactured front panel 10 and is heated and bonded at a predetermined temperature (sealing process).
Thereafter, the inside of the discharge space is evacuated to a high vacuum (1.0 × 10 ⁻⁴ Pa) (exhaust stroke). Then, a discharge gas such as Ne—Xe, He—Ne—Xe, or Ne—Xe—Ar is sealed at a predetermined pressure (here, 66.5 kPa to 101 kPa) (encapsulation step).

Thus, the PDP 1 is completed.
3. About the material used for void | hole formation In the said embodiment, although the structure which used the tetrahedral type | mold crystal body 160 for the space | gap 16 was shown, the said crystal body 160 is not essential and phosphor layer 17G ~ It is possible to form 17B. However, it is effective to use the crystal body 160 as a column means for ensuring a good shape of the void 16 during manufacturing.

In addition, by using the tetrahedral crystal 160, the gap 16 can be reliably obtained, and when a voltage is applied to the display electrode pair 12 during driving, an electric field is concentrated on the tip of the needle-like portion 162. Therefore, the effect of abundant emission of electrons can be expected.
Further, the crystal is not limited to a tetrahedral shape. In the case where the effect of concentrating the electric field in the crystal body is not necessary, and it is sufficient that the phosphor layers 17R to 17G and the voids 16 can be formed satisfactorily, a fiber mainly composed of ZnO as shown in FIG. A type crystal body 160A may be used. FIG. 3B is a perspective view showing the fiber type crystal body 160A.

  The crystal body 160A shown in the drawing includes a core portion 163 necessary for forming the air gap 16 and a sharp portion 164 that plays a role of causing electron concentration by generating an electric field concentration. As the crystal 160A, a product of Nippon Electric Glass Co., Ltd. can be used as a commercial product. If the total length of the fiber type crystal body 160A is too short, a sufficient gap 16 cannot be formed, and if it is too long, it contacts the adjacent discharge cell C. Therefore, the length per one is desirably 1 to 20 μm. Furthermore, it is preferable that the core portion 163 has a sharp shape with a diameter of 1 to 5 μm and the sharp portion 164 has a diameter of 1 to 50 nm. By setting the length of one fiber-type crystal body 160A to 10 μm or more and 50 μm or less, a void 16 of 10 μm or more and 150 μm or less can be formed similarly to the tetrahedral crystal body 160, and thus the void 16 capable of exhibiting good luminous efficiency. Can be secured.

Note that the crystal bodies 160 and 160A may be selectively used, or may be mixed and used at a predetermined ratio.
In the above example, the configuration of the PDP 1 including the crystal particle layer 15 is illustrated, but the crystal particle layer 15 is not an essential configuration. For example, as described above, when a material having excellent field emission characteristics is used as the material of the crystal bodies 160 and 160A, it is considered that the effect of reducing the discharge voltage and the rising characteristics of the discharge are sufficient. The layer 15 may not be provided.
4). Verification Experiment An example was prepared for the PDP of the present invention manufactured by the above manufacturing method, and a verification experiment on the shape of the voids and the phosphor layer was performed. As a method for evaluating PDP, a scanning confocal laser microscope (using a short-wavelength semiconductor laser having a wavelength of 408 nm) was used to evaluate the shape of the front panel gap and phosphor layer. The light emission luminance during driving was evaluated using a CRT color analyzer.

(Experimental conditions)
As examples and comparative examples used in this experiment, high-definition PDPs were produced based on the present invention and the conventional production method, respectively.
For comparison, the size of the glass substrate was 5 inches diagonal, and the size of the divided discharge space (cell size) was 100 inches and 8K × 4K (4000 scanning lines) equivalent. The discharge gas was sealed in the panel at a Xe content of 100% (volume%) and a pressure of 29.9 kPa (225 Torr). One pitch (corresponding to W in FIG. 2) of the discharge cells was set to 95 μm, the width of the transparent electrode in Scn and Sus was set to 60 μm, and the width of the bus electrode was set to 35 μm. The main discharge gap of the display electrode pair was 80 μm, and the width of the data electrode was 40 μm.

  In the PDP of the example, support members were provided in a matrix so as to partition each discharge cell on the back panel. The top width of the support member was set to 30 μm and the height was set to 80 μm. Further, a tetrahedral crystal (size: about 20 μm) containing ZnO as a main component was used, and voids were formed by screen printing. The phosphor layer was formed by using a phosphor having a center particle diameter of about 1.5 μm and applying a material by an inkjet method.

In the PDP of the comparative example, the partition walls were formed on the back panel by a conventional photolithography method or a sand blast method based on a conventional manufacturing method. Further, a material containing phosphor particles having a center particle diameter of about 3 μm was applied to the back panel by a dispenser method and baked to form a phosphor layer.
(Consideration of results)
In the comparative PDP, pixel defects of 10 to 20% of the total number of discharge cells occurred. Further, the phosphor layer had a large variation in film thickness of 5 μm to 80 μm. These defects mean that in the manufacturing method of the comparative example, when forming a minute discharge space, it is a factor that may cause problems such as missing coating of phosphor material, missing printing, printing unevenness, Conventionally, it is difficult to manufacture a stable high-definition PDP.

On the other hand, in the example, pixel defects caused by missing printing or missing coating of the phosphor material could be reduced to 1% or less. The thickness of the formed gap was about 30 to 40 μm, and the thickness of the phosphor layer was about 10 to 20 μm. The variation in the layer thickness was greatly improved as compared with the conventional method.
Moreover, in the PDP of the comparative example, the light emission luminance at the time of all white display was 600 cd / m ² , and the luminance unevenness caused by the non-uniformity of the phosphor layer thickness occurred.

On the other hand, in the PDP of the example, although the light emission luminance was slightly reduced to 540 cd / m ² , the light emission luminance that is comparable to the image display performance was exhibited. Further, in the comparative example, a portion where the luminance is reduced by about 10% to 20% in the same screen is generated by 30% in the screen area ratio, but in the embodiment, the luminance is 5% as compared with other portions. The lowering part was not seen in all screens. As described above, in the PDP of the example, it was possible to confirm a good image display performance in which luminance unevenness was solved in addition to the pixel defect described above. In addition, it was confirmed that due to the electron emission effect from the tetrahedral crystal used in the gap, the discharge sustaining voltage was 300 V in the comparative example PDP, but could be reduced to 290 V, which was about 10 V lower. Furthermore, when a crystal body in which 1 at% of Ga was added to ZnO was used, the discharge sustaining voltage was 270 V, and a reduction effect of about 30 V was confirmed compared to the comparative example.

  From the above experimental results, the embodiment has a configuration with higher accuracy than the comparative example, exhibits excellent image display performance, and also exhibits an effect of reducing power consumption, and has a clear superiority with respect to the present invention. It could be confirmed.

  The PDP of the present invention can be used for a television set in a transportation facility, public facility, home, etc., a display device used for a computer display, and the like. In addition, since the PDP according to the present invention can exhibit high quality that could not be realized by the conventional method even when the definition is increased, it can be used for, for example, a small and high-definition display and can be used for various sizes. It is what you have.

It is the perspective view developed about the principal part of PDP concerning this embodiment. It is sectional drawing which shows the principal part of the front panel and back panel which concern on this Embodiment, and the front view of a front panel. It is a perspective view which shows the structure of the various crystal bodies introduce | transduced into a space | gap. It is the perspective view developed about the principal part of the conventional PDP.

Explanation of symbols

C discharge cell G main discharge gap W discharge cell pitch in the width direction 3W discharge cell pitch in the longitudinal direction 1 PDP
DESCRIPTION OF SYMBOLS 3 Discharge space 10 Front panel 11 Front substrate 12 Display electrode pair 13, 23 Dielectric layer 14 Protective layer 15 Crystal grain layer 16 Void 17R, 17B, 17G Phosphor layer 20 Rear panel 21 Rear substrate 22 Data (address) electrode 24 Support Member 160 Tetrahedral crystal body 160A Fiber-type crystal body 161 Body core part 162 Needle-like part 163 Core part 164 Sharp part

Claims (23)

A plasma display panel having a pair of opposed panels,
A dome-shaped phosphor layer is formed on the main surface of the other panel facing one panel, and a gap for discharge is formed between the dome-shaped phosphor layer and the panel lower layer surface covered by the dome-shaped phosphor layer. A plasma display panel. On the main surface side of the other panel, an electrode, a dielectric layer covering the electrode, and a protective layer covering the dielectric layer are sequentially formed,
The plasma display panel according to claim 1, wherein the dome-shaped phosphor layer is formed at a plurality of positions on the protective layer. On the main surface side of the other panel, an electrode, a dielectric layer covering the electrode, a protective layer covering the dielectric layer, and a crystal particle layer including a magnesium oxide crystal particle group are sequentially formed.
The plasma display panel according to claim 1, wherein the dome-shaped phosphor layer is formed at a plurality of positions on the crystal particle layer. In each of the voids, at least one crystal body of at least one of a tetrahedral crystal body or a fiber crystal body in which needle-shaped portions extend in the direction of four apexes from the body center of a regular tetrahedron is disposed. The plasma display panel according to claim 1. The plasma display panel according to claim 4, wherein the crystal body contains ZnO as a main component. The plasma display panel according to claim 4, wherein the crystal body is a semiconductor. The plasma display panel according to claim 6, wherein the semiconductor is a semiconductor obtained by adding Ga to ZnO. The plasma display panel according to claim 4, wherein a distance between the vertices in the tetrahedral crystal is 10 μm or more and 50 μm or less. The plasma display panel according to claim 4, wherein a diameter of a tip portion of the needle-like portion in the tetrahedral crystal is 1 nm or more and 50 nm or less. The plasma display panel according to claim 4, wherein one length of the fiber crystal body is 10 μm or more and 50 μm or less. The plasma display panel according to claim 4, wherein the fiber crystal body includes a columnar core portion and a sharp portion provided at one end of the core portion. The plasma display panel according to claim 11, wherein the fiber type crystal body has a core portion with a diameter of 1 µm or more and 5 µm or less, and a sharp portion with a diameter of 1 nm or more and 50 nm or less. The plasma display panel according to any one of claims 4 to 12, wherein a remaining space excluding a space occupied by the crystal body in the void is in a range of 50% or more and 90% or less of a total volume of the void. The plasma display panel according to claim 1, wherein at least one of the pair of panels is provided with a support member for securing a gap with the other panel. A plurality of discharge cells are disposed along the horizontal direction of the screen on the pair of substrates,
The plasma display panel according to claim 1, wherein a pitch between adjacent discharge cells in the horizontal direction is not less than 50 μm and not more than 160 μm. A first substrate forming step of forming a dielectric layer and a protective layer on the main surface of the first substrate on which the electrode is disposed so as to cover the electrode, and the formed first substrate facing the second substrate A manufacturing method of a plasma display panel that undergoes a sealing process to be bonded,
Between the first substrate forming process and the sealing process,
A crystal material disposing step of partially disposing the crystal disperse material in which the crystal is dispersed on the surface of the protective layer;
A phosphor material disposing step of disposing a phosphor material on the crystal dispersion material;
A firing step of heating the crystal dispersion material and the phosphor material to form a phosphor layer and removing an organic component of the pre-crystal dispersion material to form a gap between the protective layer and the phosphor layer. When,
The manufacturing method of the plasma display panel which passes through. A first substrate forming step of forming a dielectric layer and a protective layer so as to cover the electrode on the main surface of the first substrate on which the electrode is disposed, and the formed first substrate is disposed opposite to the second substrate. A method for manufacturing a plasma display panel, comprising:
Between the first substrate forming process and the sealing process,
A crystal particle material disposing step of disposing a fine particle dispersed material in which magnesium oxide fine particles are dispersed on the surface of the protective layer;
A crystal material material disposing step of partially disposing a crystal material dispersed material in which a crystal is dispersed on a fine particle dispersed material;
A phosphor material disposing step of disposing a phosphor material on the crystal dispersion material;
The disposed crystal dispersion material and the phosphor material are baked to form a phosphor layer, and an organic component of the crystal dispersion material is removed to form a gap between the crystal particle layer and the phosphor layer. A firing step to be formed;
The manufacturing method of the plasma display panel which passes through. In at least one of the crystalline material arranging step and the phosphor material arranging step,
The method for manufacturing a plasma display panel according to claim 16 or 17, wherein the disposed material is solidified. The method for manufacturing a plasma display panel according to claim 17, wherein the arranged material is solidified in the crystal particle arranging step. The method for manufacturing a plasma display panel according to any one of claims 16 to 19, wherein in the firing step, the first substrate is fired at 480 ° C or higher. The method for manufacturing a plasma display panel according to claim 17 or 19, wherein a material containing the same medium is used in the crystal particle material disposing step, the crystal material disposing step, and the phosphor material disposing step. The method for manufacturing a plasma display panel according to any one of claims 16 to 21, wherein in the phosphor disposing step, a phosphor material is disposed on the crystal-dispersed material using an inkjet method. The method for manufacturing a plasma display panel according to any one of claims 16 to 22, wherein in the phosphor arranging step, a phosphor having a center particle diameter of 1 µm to 2 µm is used.

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