WO2012081219A1 - Écran à plasma et son procédé de fabrication - Google Patents

Écran à plasma et son procédé de fabrication Download PDF

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Publication number
WO2012081219A1
WO2012081219A1 PCT/JP2011/006916 JP2011006916W WO2012081219A1 WO 2012081219 A1 WO2012081219 A1 WO 2012081219A1 JP 2011006916 W JP2011006916 W JP 2011006916W WO 2012081219 A1 WO2012081219 A1 WO 2012081219A1
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Prior art keywords
fine particles
component
dielectric
display panel
plasma display
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PCT/JP2011/006916
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English (en)
Japanese (ja)
Inventor
豊田　誠司
博之 安喰
泰彦 中田
土居　由佳子
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パナソニック株式会社
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Publication of WO2012081219A1 publication Critical patent/WO2012081219A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
    • H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J11/38—Dielectric or insulating layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
    • H01J2211/20—Constructional details
    • H01J2211/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J2211/38—Dielectric or insulating layers

Definitions

  • the technology disclosed herein relates to a plasma display panel used for a display device or the like and a manufacturing method thereof.
  • Silver electrodes for ensuring conductivity are used for bus electrodes constituting display electrodes of a plasma display panel (hereinafter referred to as PDP).
  • PDP plasma display panel
  • For the dielectric layer covering the bus electrode low melting point glass mainly composed of lead oxide is used.
  • a dielectric layer not containing a lead component has been used in consideration of the environment (for example, see Patent Document 1).
  • the PDP according to the first disclosure includes a front plate and a back plate provided to face the front plate.
  • the front plate has a display electrode and a dielectric layer covering the display electrode.
  • the dielectric layer includes a plurality of fine particles mainly composed of an inorganic oxide. At least some of the plurality of fine particles are at least one selected from the group consisting of B, Al, Mg, Ca, Sr, Ba and Zn, and are different from the inorganic component constituting the inorganic oxide. Multi-component fine particles containing components.
  • a method of manufacturing a PDP according to the first disclosure includes forming a dielectric paste layer by applying a dielectric paste to a substrate, and then forming the dielectric layer by firing the dielectric paste layer.
  • the dielectric paste includes a plurality of fine particles mainly composed of an inorganic oxide. At least some of the plurality of fine particles are at least one selected from the group consisting of B, Al, Mg, Ca, Sr, Ba and Zn, and are different from the inorganic component constituting the inorganic oxide. Multi-component fine particles containing components.
  • the PDP according to the second disclosure includes a front plate and a back plate provided to face the front plate.
  • the front plate has a display electrode and a dielectric layer covering the display electrode.
  • the dielectric layer includes a plurality of fine particles mainly composed of an inorganic oxide. At least some of the plurality of fine particles are at least one selected from the group consisting of B, Al, Mg, Ca, Sr, Ba and Zn, and are different from the inorganic component constituting the inorganic oxide. Multi-component coated fine particles coated with a film containing components.
  • a method of manufacturing a PDP according to the second disclosure is to form a dielectric paste layer by applying a dielectric paste to a substrate, and then form the dielectric layer by firing the dielectric paste layer.
  • the dielectric paste includes a plurality of fine particles mainly composed of an inorganic oxide. At least some of the plurality of fine particles are at least one selected from the group consisting of B, Al, Mg, Ca, Sr, Ba and Zn, and are different from the inorganic component constituting the inorganic oxide. Multi-component coated fine particles coated with a film containing components.
  • FIG. 1 is a perspective view illustrating a schematic structure of a PDP according to an embodiment.
  • FIG. 2 is a cross-sectional view illustrating the structure of the front plate according to the embodiment.
  • FIG. 3 is a diagram illustrating a dielectric layer according to the first example.
  • FIG. 4 is a diagram illustrating a dielectric layer according to the second embodiment.
  • the PDP 1 of the present embodiment is an AC surface discharge type PDP.
  • a front plate 2 made of a front glass substrate 3 and the like and a back plate 10 made of a back glass substrate 11 and the like are arranged to face each other.
  • the outer peripheral portions of the front plate 2 and the back plate 10 are hermetically sealed with a sealing material made of glass frit or the like.
  • the discharge space 16 inside the sealed PDP 1 is filled with a discharge gas such as Ne and Xe at a pressure of 55 kPa to 80 kPa.
  • a pair of strip-shaped display electrodes 6 composed of scanning electrodes 4 and sustaining electrodes 5 and black stripes (light shielding layers) 7 are arranged in a plurality of rows in parallel with each other.
  • a dielectric layer 8 serving as a capacitor is provided on the front glass substrate 3 so as to cover the display electrode 6 and the light shielding layer 7. Further, a protective layer 9 made of magnesium oxide (MgO) or the like is provided on the surface of the dielectric layer 8.
  • MgO magnesium oxide
  • a plurality of strip-like address electrodes 12 are arranged in parallel to each other in a direction orthogonal to the display electrodes 6 of the front plate 2.
  • a base dielectric layer 13 is provided so as to cover the address electrodes 12.
  • a partition wall 14 having a predetermined height is provided on the base dielectric layer 13 formed between the address electrodes 12 to divide the discharge space 16. Between the partition walls 14, a phosphor layer 15 that emits red light by ultraviolet rays, a phosphor layer 15 that emits blue light, and a phosphor layer 15 that emits green light are sequentially provided.
  • a discharge cell is provided at a position where the display electrode 6 and the address electrode 12 intersect.
  • the pixel for color display includes a discharge cell having a phosphor layer 15 that emits red light, a discharge cell having a phosphor layer 15 that emits blue light, and a discharge cell having a phosphor layer 15 that emits green light. .
  • FIG. 2 is referred to for the front plate 2.
  • the scan electrode 4, the sustain electrode 5, and the light shielding layer 7 are formed on the front glass substrate 3.
  • the display electrode 6 has a scan electrode 4 and a sustain electrode 5.
  • Scan electrode 4 and sustain electrode 5 have white electrodes 4b and 5b containing silver (Ag) for ensuring conductivity.
  • Scan electrode 4 and sustain electrode 5 have black electrodes 4a and 5a containing a black pigment in order to improve the contrast of the image display surface.
  • the white electrode 4b is laminated on the black electrode 4a.
  • the white electrode 5b is laminated on the black electrode 5a.
  • a black paste layer (not shown) is formed by applying a black paste containing a black pigment to the front glass substrate 3 by a screen printing method or the like.
  • a black paste layer (not shown) is patterned by photolithography.
  • a white paste containing silver (Ag) is applied onto a black paste layer (not shown) by screen printing or the like, thereby forming a white paste layer (not shown).
  • a white paste layer (not shown) and a black paste layer (not shown) are patterned by photolithography.
  • a black paste layer (not shown) and a white paste layer (not shown) are baked through a development step, whereby the white electrodes 4b and 5b, the black electrodes 4a and 5a, which are the display electrodes 6, and the light shielding. Layer 7 is formed.
  • a dielectric layer 8 that covers the scan electrode 4, the sustain electrode 5, and the light shielding layer 7 is formed.
  • the dielectric layer 8 will be described in detail later.
  • a protective layer 9 made of magnesium oxide (MgO) or the like is formed on the dielectric layer 8 by a vacuum deposition method or the like.
  • the front plate 2 having the scanning electrode 4, the sustaining electrode 5, the light shielding layer 7, the dielectric layer 8, and the protective layer 9 on the front glass substrate 3 is completed through the above steps.
  • the front plate 2 may not have the light shielding layer 7.
  • the address electrode 12 is formed on the rear glass substrate 11. Specifically, an address electrode paste layer (not shown) is formed by applying a paste containing silver (Ag) onto the rear glass substrate 11 by screen printing. Next, an address electrode paste layer (not shown) is patterned by a photolithography method to form a material layer (not shown) to be a component for the address electrode 12. Thereafter, the address layer 12 is formed by firing a material layer (not shown) at a predetermined temperature.
  • a method of forming a metal film on the rear glass substrate 11 by a sputtering method, a vapor deposition method or the like is employed.
  • a base dielectric paste layer (not shown) is formed by applying a base dielectric paste on the back glass substrate 11 on which the address electrodes 12 have been formed so as to cover the address electrodes 12 by a die coating method or the like. Is done. Thereafter, the base dielectric paste layer (not shown) is fired to form the base dielectric layer 13.
  • the base dielectric paste is a paint containing a base dielectric material such as glass powder, a binder, and a solvent.
  • a partition wall paste (not shown) is formed by applying a partition wall forming paste including a partition wall material on the base dielectric layer 13.
  • a partition wall paste layer (not shown) is patterned by photolithography to form a structure (not shown) that becomes a material layer of the partition wall 14.
  • the partition 14 is formed by baking a structure (not shown).
  • a sandblast method or the like is adopted in addition to the photolithography method.
  • a phosphor paste containing a phosphor material is applied on the underlying dielectric layer 13 between the adjacent barrier ribs 14 and on the side surfaces of the barrier ribs 14.
  • the phosphor layer 15 is formed by firing the phosphor paste.
  • the back plate 10 having the address electrodes 12, the base dielectric layer 13, the partition walls 14 and the phosphor layer 15 on the back glass substrate 11 is completed.
  • Dielectric Layer 8 To reduce the dielectric constant of the dielectric layer 8, nanometer-sized fine particles made of silicon dioxide (hereinafter, referred to as SiO 2 fine particles) is a technique for forming a dielectric layer 8 using. Specifically, a dielectric paste in which a plurality of SiO 2 fine particles are dispersed is used. The dielectric paste is applied on the substrate. The applied dielectric paste is appropriately heat treated.
  • the bonding force between the SiO 2 fine particles may be reduced. That is, there is a problem that the mechanical strength of the dielectric layer 8 is lowered and cracks are generated in the dielectric layer 8.
  • the dielectric layer 8 is required to have a low relative dielectric constant, a high withstand voltage, and a high light transmittance. These characteristics greatly depend on the structure of the dielectric layer 8. Furthermore, cracks are likely to occur on the surface of the dielectric layer 8 due to the difference in thermal expansion coefficient between the dielectric layer 8 and the glass substrate due to dense SiO 2 fine particles. Further, when heat treatment is performed using SiO 2 fine particles at the firing temperature in the conventional manufacturing process, the bonding force between the SiO 2 fine particles may be reduced. That is, many gaps are formed in the dielectric layer 8. Therefore, dielectric breakdown is likely to occur in the dielectric layer 8 when a voltage is applied to display an image of the PDP.
  • the dielectric layer 8 according to the example 1 is composed of multi-component fine particles 20 and inorganic fine particles 21 made of a single component such as SiO 2 fine particles.
  • the dielectric layer 8 has a gap 23.
  • the dielectric layer 8 may include only the multi-component fine particles 20 without including the inorganic fine particles 21.
  • the dielectric layer is composed only of inorganic fine particles 21 made of a single component such as SiO 2 fine particles.
  • the multicomponent fine particles 20 are multicomponent fine particles mainly composed of an inorganic oxide.
  • the multi-component fine particles 20 are selected from the group consisting of silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), zinc oxide (ZnO), and gallium oxide (Ga 2 O 3 ). And at least one selected from the group consisting of boron (B), aluminum (Al), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and zinc (Zn)
  • a multi-component alkoxide solution is prepared and produced by the addition of an alkaline catalyst.
  • the dielectric layer 8 according to the example 1 is not composed of only the inorganic fine particles 21 made of a single component such as SiO 2 fine particles.
  • the dielectric layer 8 according to the example 1 includes multi-component fine particles 20. Therefore, in the manufacturing process of the PDP 1, the surfaces of the multicomponent fine particles 20 are fused to the adjacent multicomponent fine particles 20. Further, the surface of the multi-component fine particle 20 is fused with the adjacent inorganic fine particle 21. Therefore, the dielectric layer 8 having higher mechanical strength and higher withstand voltage can be obtained.
  • the average particle size of the multi-component fine particles 20 and the inorganic fine particles 21 (hereinafter collectively referred to as dielectric glass fine particles) is preferably 10 nm or more and 150 nm or less. This is based on the following reason.
  • the air gap 23 in the dielectric layer 8 is an important factor that determines the relative permittivity and light transmittance.
  • the size of the gap 23 is determined by the particle size of the dielectric glass fine particles constituting the dielectric layer 8.
  • the size of the gap 23 is preferably 100 nm or less, which corresponds to about a quarter of the shortest wavelength of visible light. This is because by suppressing the light scattering in the gap 23, a visible light transmittance of 75% or more can be obtained in the dielectric layer 8.
  • the size of the gap 23 is more preferably 50 nm or less. Further, light scattering is suppressed.
  • the average particle size of the dielectric glass particles is preferably about 1.5 times the size of the gap 23. That is, the average particle size of the dielectric glass fine particles is preferably 150 nm or less. When the size of the void 23 is 50 nm or less, the average particle size of the dielectric glass fine particles is preferably 75 nm or less.
  • the average particle size of the dielectric glass particles is preferably 10 nm or more.
  • the average particle diameter is the volume cumulative average diameter (D50).
  • a laser diffraction particle size distribution measuring device MT-3300 manufactured by Nikkiso Co., Ltd. was used for measuring the average particle size.
  • the size of the void 23 was measured by observing the cross section of the dielectric layer 8 with a scanning electron microscope. In the cross section of the dielectric layer 8, if the gap 23 is substantially circular, the diameter is the size of the gap 23. If the gap 23 is not circular, a circle inscribed in the gap 23 is assumed, and the diameter of the inscribed circle is the size of the gap 23.
  • the dielectric glass used to form the dielectric layer 8 contained 20% by weight or more of lead oxide in order to enable firing at about 450 ° C. to 600 ° C.
  • the dielectric glass particles do not contain lead oxide for environmental consideration. That is, the dielectric layer 8 according to Example 1 does not contain lead oxide.
  • the dielectric paste according to Example 1 is composed of a dielectric glass slurry in which multicomponent fine particles 20 and inorganic fine particles 21 are dispersed and a vehicle.
  • the multi-component fine particle 20 includes one inorganic oxide selected from the group of SiO 2 , Al 2 O 3 , ZnO, and Ga 2 O 3 , and B, Al, Mg, Ca, Sr, Ba, and Zn.
  • a multi-component alkoxide solution containing at least one selected from the group is prepared and produced by adding an alkaline catalyst.
  • the concentration of the component in the multi-component alkoxide solution as an additive is 10 mol% or more and 20 mol% or less.
  • the additive is preferably 10 mol% or more.
  • it is preferably 20 mol% or less in order to suppress the deterioration of the dielectric glass fine particles due to the aggregation of the dielectric glass fine particles or the decrease in water resistance in the dielectric paste or before the dielectric baking step.
  • the element of the component used as an additive needs to be a component different from said inorganic oxide. Further, the mixing ratio of the inorganic oxide and the multi-component alkoxide solution is appropriately blended so as to have the above-mentioned concentration.
  • a diluted alkaline aqueous solution such as an aqueous sodium hydroxide solution or an aqueous ammonia solution is used.
  • the addition amount of the alkaline catalyst is preferably 0.1 to 6% by weight of the whole solution.
  • the above-mentioned concentration range of inorganic oxide, multi-component alkoxide solution and alkaline catalyst are mixed and further stirred for a predetermined time. This creates a suspension. Fine particles are collected by filtering the suspension. By firing the fine particles, the multicomponent fine particles 20 are obtained.
  • the firing temperature of the fine particles is preferably 600 ° C. or higher as a temperature at which organic components around the fine particles can be removed by combustion and the fine particles do not fuse with each other. Furthermore, it is preferably below the softening point of the glass forming the multicomponent fine particles 20.
  • the range of the firing temperature is approximately 600 ° C. to 1000 ° C.
  • the inorganic fine particles 21 are preferably SiO 2 , Al 2 O 3 , ZnO, Ga 2 O 3 and the like as inorganic materials. SiO 2 is particularly preferred.
  • the dielectric glass slurry is composed of 10% to 65% by weight of the dielectric glass fine particles and 35% to 90% by weight of the solvent.
  • the solvent include alcohols, glycols, and water.
  • a lubricant or a dispersant may be added to the dielectric glass slurry.
  • the dielectric glass slurry having such a configuration improves dispersibility.
  • the dielectric paste includes a dielectric glass slurry manufactured as described above.
  • a binder component such as a vehicle is mixed and dispersed in the dielectric paste as necessary.
  • the binder component is terpineol or butyl carbitol acetate containing 1% to 20% by weight of ethyl cellulose or acrylic resin.
  • dioctyl phthalate, dibutyl phthalate, triphenyl phosphate, and tributyl phosphate may be added to the dielectric paste as a plasticizer.
  • the multi-component fine particles 20 and the inorganic fine particles 21 are uniformly dispersed in the dielectric paste.
  • a screen printing method, a die coating method, or the like is used as a method for forming the dielectric layer 8.
  • a dielectric paste is applied on the front glass substrate 3 on which the display electrodes 6 are provided.
  • the applied dielectric paste constitutes a dielectric paste layer.
  • the film thickness of the dielectric paste layer is appropriately set in consideration of the rate of shrinkage due to firing.
  • the dielectric paste layer is dried in a temperature range of 100 ° C. to 200 ° C.
  • the dielectric paste layer is fired at a temperature range of 450 ° C. to 600 ° C. As a result, as shown in FIG.
  • the surfaces of the multi-component fine particles 20 are fused to the adjacent multi-component fine particles 20. Further, the surface of the multi-component fine particle 20 is fused with the adjacent inorganic fine particle 21. That is, the dielectric layer 8 according to the example 1 is composed of the multi-component fine particles 20 and the inorganic fine particles 21 made of a single component such as SiO 2 fine particles. The dielectric layer 8 has a gap 23.
  • a sheet obtained by applying a dielectric paste on a film and drying it can be used. Specifically, the dielectric paste formed on the sheet is transferred to the front glass substrate 3. Also with this method, the dielectric layer 8 having the above-described configuration can be formed.
  • the luminance of the PDP 1 is improved as the thickness of the dielectric layer 8 is reduced. Further, the discharge voltage of the PDP 1 decreases as the thickness of the dielectric layer 8 decreases. Therefore, it is preferable that the thickness of the dielectric layer 8 is as small as possible within a range where the withstand voltage does not decrease.
  • the film thickness of the dielectric layer 8 is not less than 10 ⁇ m and not more than 20 ⁇ m from both the viewpoint of dielectric strength and the viewpoint of visible light transmittance.
  • the dielectric layer 8 according to the example 2 is composed of multi-component coated fine particles 22 and inorganic fine particles 21 made of a single component such as SiO 2 fine particles.
  • the dielectric layer 8 has a gap 23.
  • the dielectric layer 8 may include only the multi-component coated fine particles 22 without including the inorganic fine particles 21.
  • the dielectric layer is composed only of inorganic fine particles composed of a single component such as SiO 2 fine particles.
  • the multi-component coated fine particle 22 is selected from the group consisting of silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), zinc oxide (ZnO), and gallium oxide (Ga 2 O 3 ) 1
  • the dielectric layer 8 according to the example 2 is not composed of only the inorganic fine particles 21 made of a single component such as SiO 2 fine particles.
  • the dielectric layer 8 according to the example 2 includes multi-component coated fine particles 22. Therefore, in the manufacturing process of the PDP 1, the surfaces of the multi-component coated fine particles 22 are fused with the adjacent multi-component coated fine particles 22. The multi-component coated fine particles 22 are fused to the adjacent inorganic fine particles 21 on the surfaces. Therefore, the dielectric layer 8 having higher mechanical strength and higher withstand voltage can be obtained.
  • the air gap 23 in the dielectric layer 8 is an important factor that determines the relative permittivity and light transmittance.
  • the size of the gap 23 is determined by the particle size of the dielectric glass fine particles constituting the dielectric layer 8.
  • the size of the gap 23 is preferably 100 nm or less, which corresponds to about a quarter of the shortest wavelength of visible light. This is because by suppressing the light scattering in the gap 23, a visible light transmittance of 75% or more can be obtained in the dielectric layer 8.
  • the size of the gap 23 is more preferably 50 nm or less. Further, light scattering is suppressed.
  • the average particle size of the dielectric glass particles is preferably about 1.5 times the size of the gap 23. That is, the average particle size of the dielectric glass fine particles is preferably 150 nm or less. When the size of the void 23 is 50 nm or less, the average particle size of the dielectric glass fine particles is preferably 75 nm or less.
  • the average particle size of the dielectric glass particles is preferably 10 nm or more.
  • the average particle diameter is the volume cumulative average diameter (D50).
  • a laser diffraction particle size distribution measuring device MT-3300 manufactured by Nikkiso Co., Ltd. was used for measuring the average particle size.
  • the size of the void 23 was measured by observing the cross section of the dielectric layer 8 with a scanning electron microscope. In the cross section of the dielectric layer 8, if the gap 23 is substantially circular, the diameter is the size of the gap 23. If the gap 23 is not circular, a circle inscribed in the gap 23 is assumed, and the diameter of the inscribed circle is the size of the gap 23.
  • the dielectric glass used to form the dielectric layer 8 contained 20% by weight or more of lead oxide in order to enable firing at about 450 ° C. to 600 ° C.
  • the dielectric glass particles do not contain lead oxide for environmental consideration. That is, the dielectric layer 8 according to Example 2 does not contain lead oxide.
  • the dielectric paste according to Example 2 is composed of a dielectric glass slurry in which multi-component coated fine particles 22 and inorganic fine particles 21 are dispersed, and a vehicle.
  • the multi-component coated fine particles 22 are generated by the following procedure as an example.
  • a multi-component alkoxide solution containing at least one selected from the group consisting of B, Al, Mg, Ca, Sr, Ba and Zn is prepared.
  • fine particles of one kind of inorganic oxide selected from the group of SiO 2 , Al 2 O 3 , ZnO and Ga 2 O 3 are added to the multicomponent alkoxide solution.
  • the multi-component alkoxide solution is stirred for a predetermined time. By the stirring, a coating layer having components contained in the multi-component alkoxide solution is formed on the surface of the fine particles.
  • the fine particles dispersed in the multi-component alkoxide solution are filtered to collect the fine particles with the coating layer formed. Thereafter, the multi-component coated fine particles 22 are obtained by firing the fine particles on which the coating layer is formed.
  • the firing temperature of the fine particles on which the coat layer is formed is 600 ° C. or higher as the temperature at which the organic components contained in the coat layer and moisture can be removed and the fine particles on which the coat layer is formed are not fused together. Is preferred. Furthermore, it is preferable that it is below the softening point of the glass which forms a coating layer.
  • the range of the firing temperature is approximately 600 ° C. to 1000 ° C.
  • the thickness of the coating layer formed on the surface of the fine particles is preferably 5 nm or more so that the multi-component coated fine particles 22 can be fused at a temperature of 600 ° C. or lower when forming the dielectric layer. Furthermore, in order not to increase the relative dielectric constant of the dielectric layer 8, it is preferably 100 nm or less.
  • the inorganic fine particles 21 are preferably SiO 2 , Al 2 O 3 , ZnO, Ga 2 O 3 and the like as inorganic materials. SiO 2 is particularly preferred.
  • the dielectric glass slurry is composed of 10% to 65% by weight of the dielectric glass fine particles and 35% to 90% by weight of the solvent.
  • the solvent include alcohols, glycols, and water.
  • a lubricant or a dispersant may be added to the dielectric glass slurry.
  • the dielectric glass slurry having such a configuration improves dispersibility.
  • the dielectric paste includes a dielectric glass slurry manufactured as described above.
  • a binder component such as a vehicle is mixed and dispersed in the dielectric paste as necessary.
  • the binder component is terpineol or butyl carbitol acetate containing 1% to 20% by weight of ethyl cellulose or acrylic resin.
  • dioctyl phthalate, dibutyl phthalate, triphenyl phosphate, and tributyl phosphate may be added to the dielectric paste as a plasticizer.
  • the multi-component coated fine particles 22 and the inorganic fine particles 21 are uniformly dispersed in the dielectric paste.
  • a screen printing method, a die coating method, or the like is used as a method for forming the dielectric layer 8.
  • a dielectric paste is applied on the front glass substrate 3 on which the display electrodes 6 are provided.
  • the applied dielectric paste constitutes a dielectric paste layer.
  • the film thickness of the dielectric paste layer is appropriately set in consideration of the rate of shrinkage due to firing.
  • the dielectric paste layer is dried in a temperature range of 100 ° C. to 200 ° C.
  • the dielectric paste layer is fired at a temperature range of 450 ° C. to 600 ° C. Thereby, as shown in FIG.
  • the surfaces of the multi-component coated fine particles 22 are fused to the adjacent multi-component coated fine particles 22.
  • the multi-component coated fine particles 22 are fused to the adjacent inorganic fine particles 21 on the surfaces. That is, the dielectric layer 8 according to the example 2 is composed of the multi-component coated fine particles 22 and the inorganic fine particles 21 made of a single component such as SiO 2 fine particles.
  • the dielectric layer 8 has a gap 23.
  • a sheet obtained by applying a dielectric paste on a film and drying it can be used. Specifically, the dielectric paste formed on the sheet is transferred to the front glass substrate 3. Also with this method, the dielectric layer 8 having the above-described configuration can be formed.
  • the luminance of the PDP 1 is improved as the thickness of the dielectric layer 8 is reduced. Further, the discharge voltage of the PDP 1 decreases as the thickness of the dielectric layer 8 decreases. Therefore, it is preferable that the thickness of the dielectric layer 8 is as small as possible within a range where the withstand voltage does not decrease.
  • the film thickness of the dielectric layer 8 is not less than 10 ⁇ m and not more than 20 ⁇ m from both the viewpoint of dielectric strength and the viewpoint of visible light transmittance.
  • the PDP 1 includes a front plate 2 and a back plate 10 provided to face the front plate 2.
  • the front plate 2 has a display electrode 6 and a dielectric layer 8 that covers the display electrode 6.
  • the dielectric layer 8 includes inorganic fine particles 21 and multi-component fine particles 20 which are a plurality of fine particles mainly composed of an oxide of an inorganic component.
  • the multi-component fine particle 20 is at least one selected from the group of B, Al, Mg, Ca, Sr, Ba, and Zn, and includes a component different from the inorganic component of the inorganic fine particle 21.
  • the surface of the multi-component fine particle 20 is fused with the adjacent multi-component fine particle 20. Further, the multi-component fine particles 20 are fused with the adjacent inorganic fine particles 21 on the surfaces. Furthermore, the dielectric layer 8 has a gap 23.
  • the bonding force between the fine particles is maintained.
  • the dielectric glass particles are not dissolved, and voids 23 remain between the fine particles. Therefore, the dielectric constant of the dielectric layer 8 can be reduced.
  • the PDP 1 of the present embodiment includes a front plate 2 and a back plate 10 provided to face the front plate 2.
  • the front plate 2 has a display electrode 6 and a dielectric layer 8 that covers the display electrode 6.
  • the dielectric layer 8 includes inorganic fine particles 21 and multi-component coated fine particles 22 which are a plurality of fine particles mainly composed of an oxide of an inorganic component.
  • the multi-component coated fine particles 22 are at least one selected from the group consisting of B, Al, Mg, Ca, Sr, Ba, and Zn, and are coated layers that are films containing components different from the inorganic components of the inorganic fine particles 21. It is covered.
  • the surfaces of the multi-component coated fine particles 22 are fused with the adjacent multi-component coated fine particles 22.
  • the multi-component fine particles 20 are fused with the adjacent inorganic fine particles 21 on the surface.
  • the dielectric layer 8 has a gap 23.
  • the bonding force between the fine particles is maintained.
  • the dielectric glass particles are not dissolved, and voids 23 remain between the fine particles. Therefore, the dielectric constant of the dielectric layer 8 can be reduced.
  • the technique disclosed here is useful for a display device with a large screen by realizing a PDP capable of suppressing the fluctuation of the discharge start voltage.

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  • Gas-Filled Discharge Tubes (AREA)

Abstract

L'invention porte sur un écran à plasma doté d'une plaque de surface avant et d'une plaque de surface arrière disposée sur le côté opposé par rapport à la plaque de surface avant. La plaque de surface avant comprend des électrodes d'affichage et une couche diélectrique qui recouvre les électrodes d'affichage. La couche diélectrique comprend une pluralité de microparticules, dont le composant principal est un oxyde inorganique. Au moins quelques-unes des microparticules de la pluralité de microparticules sont au moins une espèce choisie dans le groupe de B, Al, Mg, Ca, Sr, Ba et Zn et sont des microparticules à plusieurs composants contenant des composants qui diffèrent des composants inorganiques constituant l'oxyde inorganique.
PCT/JP2011/006916 2010-12-16 2011-12-12 Écran à plasma et son procédé de fabrication WO2012081219A1 (fr)

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JP2010-280147 2010-12-16
JP2010280147 2010-12-16
JP2010-281597 2010-12-17
JP2010281597 2010-12-17

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JP2005290104A (ja) * 2004-03-31 2005-10-20 Central Glass Co Ltd 低誘電体材料用ガラス状物質及びディスプレイ用ガラス板
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JP2007299642A (ja) * 2006-04-28 2007-11-15 Matsushita Electric Ind Co Ltd プラズマディスプレイパネルとその製造方法
JP2008024582A (ja) * 2006-06-19 2008-02-07 Nihon Yamamura Glass Co Ltd 球状多成分ガラス微粒子
JP2010135084A (ja) * 2008-12-02 2010-06-17 Panasonic Corp プラズマディスプレイパネル及びその製造方法
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* Cited by examiner, † Cited by third party
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JP2003518318A (ja) * 1999-12-22 2003-06-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ プラズマディスプレイパネル又はｐａｌｃディスプレイパネル及び誘電体層を具えるそのようなパネルの製造方法
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JP2005290104A (ja) * 2004-03-31 2005-10-20 Central Glass Co Ltd 低誘電体材料用ガラス状物質及びディスプレイ用ガラス板
JP2007087636A (ja) * 2005-09-20 2007-04-05 Asahi Kasei Electronics Co Ltd 誘電体層形成用コーティング組成物
JP2007287559A (ja) * 2006-04-19 2007-11-01 Sony Corp プラズマディスプレイパネル及びプラズマディスプレイパネルの製造方法
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JP2010135084A (ja) * 2008-12-02 2010-06-17 Panasonic Corp プラズマディスプレイパネル及びその製造方法

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