WO2006064880A1 - シール材、シール材を用いた画像表示装置、画像表示装置の製造方法、およびこの製造方法により製造された画像表示装置 - Google Patents
シール材、シール材を用いた画像表示装置、画像表示装置の製造方法、およびこの製造方法により製造された画像表示装置 Download PDFInfo
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- WO2006064880A1 WO2006064880A1 PCT/JP2005/023059 JP2005023059W WO2006064880A1 WO 2006064880 A1 WO2006064880 A1 WO 2006064880A1 JP 2005023059 W JP2005023059 W JP 2005023059W WO 2006064880 A1 WO2006064880 A1 WO 2006064880A1
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- Prior art keywords
- display device
- image display
- substrate
- sealing material
- sealing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/123—Flat display tubes
- H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
- H01J31/127—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using large area or array sources, i.e. essentially a source for each pixel group
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/20—Seals between parts of vessels
- H01J5/22—Vacuum-tight joints between parts of vessel
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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
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/26—Sealing together parts of vessels
- H01J9/261—Sealing together parts of vessels the vessel being for a flat panel display
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2209/00—Apparatus and processes for manufacture of discharge tubes
- H01J2209/26—Sealing parts of the vessel to provide a vacuum enclosure
- H01J2209/264—Materials for sealing vessels, e.g. frit glass compounds, resins or structures
Definitions
- Seal material image display device using seal material
- method of manufacturing image display device method of manufacturing image display device, and image display device manufactured by this manufacturing method
- the present invention relates to a sealing material used for a vacuum seal portion that maintains a high vacuum space sandwiched between two substrates constituting an image display device, a flat plate type image display device using the same, and an image display device
- the present invention relates to an image display device manufacturing method and an image display device manufactured by the manufacturing method.
- self-luminous flat displays which are becoming the mainstream of displays, basically include two glass substrates arranged opposite to each other, on one glass substrate, a circuit for forming an image and electron emission or A plasma forming element is incorporated, and a phosphor facing the element is formed on the other glass substrate.
- the two glass substrates are placed facing each other with an appropriate space so that the element can work effectively. This space is required to have a high degree of vacuum in an electron beam excitation display. Therefore, the two glass substrates must maintain a proper space and have a structure that can withstand high temperatures and vacuums.
- a frame made of the same glass material as the glass substrate is prepared. Then, this frame body is bonded with a glass-based adhesive along the entire circumference of one glass substrate, and the other glass substrate and the frame body have low wettability with glass such as indium or indium alloy.
- a melting point metal is used to achieve adhesion and vacuum sealing. When these low melting point metals are heated to their melting point or higher and melted, they exhibit high wettability to the glass and can be processed at a low temperature without causing distortion in the glass. Highly airtight and highly reliable sealing is possible.
- the method of obtaining a vacuum seal structure by using a low melting point metal such as indium or an indium alloy as a seal material is originally intended for sealing with a small area.
- Large image display devices require a very large and long area to be sealed. It is difficult to obtain a highly reliable vacuum seal structure by simple application of the conventional technology.
- indium including indium alloy
- indium alloy has already been consumed in large quantities as a transparent electrode film
- further use of indium as a sealing material must be suppressed from the viewpoint of the environment.
- the properties required for materials that replace indium are rich in resources as the first definition. In addition, it must have a low melting point close to 157 ° C, the melting point of indium, and a low vapor pressure that does not volatilize in the baking of panel glass, which is a process for obtaining a high vacuum. From this point of view, selecting a metal element naturally makes Sn a candidate. For example, in Japanese Patent Application Laid-Open No. 11-77370 and Japanese Patent Application No. 2004-149354, Sn alloy is used as a sealing material for two glass panels. The concept of use is disclosed.
- Japanese Patent Application Laid-Open No. 11-77370 is limited to the Sn_Bi alloy, and the use of Bi having a high vapor pressure requires the sealing material to obtain a high vacuum. It does n’t match the performance.
- Japanese Laid-Open Patent Publication No. 2004-149354 discloses a configuration in which the inner air is excluded from a predetermined position and the pressure is reduced after soldering the periphery of two glasses with Sn alloy. In such a configuration, it is theoretically impossible to go through a baking process for obtaining a high vacuum. That is, the Sn alloy disclosed in Japanese Patent Application Laid-Open No.
- 2004-149354 has a melting point in the vicinity of at least 232 ° C, which is the melting point of Sn. Therefore, when heated to a temperature of 300 ° C or higher necessary for the baking process, It becomes. The molten Sn alloy is sucked into the seal due to the pressure difference from the atmosphere and loses its sealing performance.
- the present invention has been made in view of the above points, and an object thereof is to maintain a high degree of vacuum and to improve the reliability, and to provide an image display device and an image display device using the same. And an image display device manufactured by the manufacturing method.
- the sheet material for the vacuum seal portion of the image display device is made up of f, Sn, a certain, f, Sn, Pb, In, Bi, Zn, Ag, Au, Cu fusion (at least one active metal is contained in the base metal containing at least one lowering element).
- the sealing material used for the vacuum seal portion of the image display device according to another aspect of the present invention is Sn or an alloy containing at least one melting point lowering element in Sn or Sn oxide generation standard free energy It contains at least one of the metals with lower standard free energy for oxide formation.
- An image display device seals two substrates disposed opposite each other with a gap therebetween, and defines a sealed space between the two substrates by sealing a predetermined position of the substrate.
- a vacuum seal portion, and the vacuum seal portion is filled along the predetermined position, and Sn, a certain layer, contains at least a melting point lowering element of Pb, In, Bi, Zn, Ag, Au, Cu in Sn.
- One type of base metal has a sealing material containing at least one type of active metal, and an active metal oxide is formed at the interface between the sealing material and the substrate.
- An image display device includes two glass substrates disposed to face each other with a gap therebetween, and a sealed space between the two glass substrates by sealing a predetermined position of the glass substrate.
- a vacuum seal portion that defines the following: a sealing layer containing an active metal in Sn and filled along the predetermined position, and an interface between the sealing layer and the glass substrate And a diffusion layer formed by diffusing the components of the sealing layer on the glass substrate side.
- An image display device includes two glass substrates disposed to face each other with a gap therebetween, and a sealed space between the two glass substrates by sealing a predetermined position of the glass substrate.
- An image display device comprising: a sealing layer that includes at least one metal selected from Ag, Au, and Cu in Sn.
- a method of manufacturing an image display device provides two substrates that are arranged to face each other with a gap between them, and seals a predetermined position of the substrate to define a sealed space between the two substrates.
- a manufacturing method of an image display device comprising a vacuum seal portion
- the sealing portion is formed by filling along a predetermined position of the substrate while applying sound waves.
- FIG. 1 is a perspective view showing an SED according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the SED broken along line II-II in FIG.
- FIG. 3 is a cross-sectional view showing an interface portion between a sealing layer and a glass substrate.
- FIG. 4 is a view showing the active metal content in the interface portion.
- FIG. 5 is a perspective view showing an FED according to a third embodiment of the present invention.
- FIG. 6 is a cross-sectional view of the FED broken along the line VI-VI in FIG.
- FIG. 7 is a cross-sectional view showing the FED substrate in the manufacturing process.
- FIG. 8 is a cross-sectional view showing a step of removing an oxide of the sealing material in the method for manufacturing an image display device according to the fourth embodiment of the present invention.
- FIG. 9 is a cross-sectional view showing a step of removing an oxide of a sealing material in a modification of the fourth embodiment of the present invention.
- FIG. 10 is a cross-sectional view showing a step of removing an oxide of a sealing material in another example of the fourth embodiment of the present invention.
- the SED includes a first substrate 11 and a second substrate 12 each made of a rectangular glass substrate, and these substrates have a gap of about 1.0 to 2. Omm. It is arranged correspondingly.
- the side wall 13 functioning as a bonding member is sealed to the inner peripheral edge portion of the second substrate 12 by, for example, a low melting point glass 23 such as frit glass.
- a low melting point glass 23 such as frit glass.
- the side wall 13 is sealed to the inner peripheral edge of the first substrate 11 by a vacuum seal portion 31 containing a low melting point metal as a seal material.
- the side wall 13 and the vacuum seal portion 31 hermetically join the peripheral portions of the first substrate 11 and the second substrate 12 and define a sealed space between the first and second substrates.
- a plurality of plate-like support members 14 made of glass, for example, are provided to support an atmospheric pressure load applied to the first substrate 11 and the second substrate 12.
- These support members 14 extend in a direction parallel to the long side of the vacuum envelope 10 and are arranged at a predetermined interval along a direction parallel to the short side.
- the shape of the support member 14 is not particularly limited to this, and a columnar support member may be used.
- a phosphor screen 15 that functions as a phosphor screen is formed on the inner surface of the first substrate 11.
- the phosphor screen 15 includes a plurality of phosphor layers 16 that emit red, green, and blue light, and a plurality of light shielding layers 17 formed between the phosphor layers.
- Each phosphor layer 16 is formed in a stripe shape, a dot shape, or a rectangular shape.
- a metal back 20 and a getter film 19 made of aluminum or the like are sequentially formed.
- an electron source for exciting the phosphor layer 16 of the phosphor screen 15 and A large number of surface-conduction electron-emitting devices 18 each emitting an electron beam are provided. These electron-emitting devices 18 are arranged in a plurality of columns and a plurality of rows, and form a pixel together with the corresponding phosphor layer 16. Each electron-emitting device 18 includes an electron-emitting unit (not shown) and a pair of device electrodes for applying a voltage to the electron-emitting unit.
- a large number of wirings 21 for supplying a potential to the electron-emitting device 18 are provided in a matrix shape, and ends thereof are drawn out of the vacuum envelope 10.
- an anode voltage of 8 kV is applied to the phosphor screen 15 and the metal back 20, and the electron beam emitted from the electron emitter 18 is anode It is accelerated by voltage and collides with the phosphor screen. As a result, the phosphor layer 16 of the phosphor screen 15 is excited to emit light, and a color image is displayed. Since a high voltage is applied to the phosphor screen 15, high strain point glass is used for the plate glass for the first substrate 11, the second substrate 12, the side wall 13, and the support member 14.
- the vacuum seal portion 31 is located at a predetermined position of the first substrate 11, that is, along a rectangular frame position along the inner peripheral edge of the first substrate and along the end surface of the side wall 13 on the first substrate side.
- a sealing layer formed of a sealing material 32 is provided at a rectangular frame-like position.
- the inventors of the present application set characteristics to be possessed as a sealing material used for the vacuum seal portion 31, and conducted various experiments in order to discover materials that satisfy the conditions.
- a sealing material Sn, or an alloy containing at least one melting point lowering element of Pb, In, Bi, Zn, Ag, Au, Cu in Ti, Ti, Zr, Hf, V, Ta, Y.
- active metals such as Ce and Mn
- alloys containing active metals such as Ti, Zr, Hf, V, Ta, Y, Ce, and Mn have been used for bonding inorganic compounds such as oxides, nitrides, and carbides to metals. It was. This utilizes the fact that active metals react with inorganic compounds such as oxides, nitrides and carbides at high temperatures, and the reaction is defined by temperature and time. Standard brazing conditions are 800 ° C x 30 minutes. Conversion The rate of academic reaction increases exponentially with increasing temperature. This means that the reaction does not proceed with a slight decrease in temperature. Therefore, it could not be applied to bonding where the reaction does not proceed at low temperatures below 500 ° C.
- the solubility of the active metal in Sn or the Sn alloy is almost negligible, and the liquidus of the alloy rises rapidly due to the addition of the active metal. Since the effect of the active metal appears from about lOOppm, in order to obtain the effect of the active metal without increasing the temperature of the liquidus, the amount of active metal added is the liquidus force of the alloy constituted by the addition 50 ° C Less than the amount below and above 0.001% by weight is more desirable, more preferably less than 0.5% and above 0.01% by weight. However, if other conditions allow, an amount exceeding the liquidus of 450 ° C may be added. In the Sn alloy, the total amount of Sn is 50% by weight or more. However, the addition of an active metal in an amount exceeding the liquidus force 3 ⁇ 450 ° C does not hinder the function of the present invention.
- the first substrate 11 and the second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm, among which:!,
- a rectangular frame-shaped side wall 13 made of glass was joined with frit glass.
- an ultrasonic wave is applied to the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13, with 0.3 wt% as the sealing material 32 and the remaining Sn alloy.
- a coated sealing layer was formed using a heating iron. At this time, the iron and the glass surface were placed in a nitrogen atmosphere. The sealing material was filled in the state.
- a gap of 20 mm was formed between the first substrate 11 and the second substrate 12, and heat treatment was performed in a vacuum of 5xlO — 6 Pa. After that, when the temperature reaches 240 ° C during the cooling process, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the position of the sealing material is aligned, and the Ti-Sn alloy is continuously connected to both surfaces. It was made to become. By cooling in this state to solidify the Sn alloy, a vacuum seal portion 31 was formed, and the side wall 13 and the first substrate 11 were hermetically sealed.
- the white portion corresponds to the sealing material
- the black portion corresponds to the glass substrate.
- the state near the interface between the sheet material 32 and the glass substrate was analyzed by EDX.
- the analysis location is at the position of 1 or 5
- 1 is the glass barrier (distance from the interface 140 nm)
- 2 is the position near the interface on the glass substrate side (distance 3 nm from the interface)
- 3 is the interface
- 4 and 5 are The position near the interface of the sealing layer (distance from the interface +2 nm, +7 nm)
- 6 corresponds to the sealing layer Balta (distance from the interface +140 nm).
- Ti which is an active metal
- the ratio of segregated material was found to be 2-30 w%.
- the thickness of the segregated portion was 1 nm to 500 nm.
- the thickness of the diffusion layer 35 in which the active metal is diffused is In m to 500 nm.
- the active metal content in the sealing layer was less than 3 wt%.
- a complex oxide composed of Si, Ti, and O was observed near the interface between the sealing metal and the glass plate.
- the SED To construct the SED, prepare the first substrate 11 and the second substrate made of glass plates of 65cm length and 110cm width, respectively.
- the side wall 13 having a rectangular frame shape was joined with frit glass.
- This alloy was coated with a heating iron with an ultrasonic wave to form a sealing layer. At this time, the glass was previously heated to 150 ° C.
- a space of 20 mm was formed between the first substrate 11 and the second substrate 12, and heat treatment was performed in a vacuum of 5xlO — 6 Pa. After that, when the temperature reaches 230 ° C during the cooling process, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the seal material is aligned, and the Ti-Sn alloy is continuously connected to both surfaces. It was made to become. By cooling in this state and solidifying the Sn alloy, a vacuum seal portion 31 was formed, and the side wall 13 and the first substrate were hermetically sealed.
- First substrate 1 consisting of glass plates 65cm long and 110cm wide to form SED 1
- a first substrate 12 and a second substrate 12 were prepared.
- an insulating layer made of an inorganic compound was formed on the surface of one of the first substrate 11 and the second substrate 12.
- the filling surface is an insulating paste that is not made of raw glass.
- an alloy of 0.2 wt% 2 30 wt% 8 balance Sn as a sheath material 32 is applied to a predetermined place facing the glass substrate, here, the inner peripheral edge of the glass substrate using an ultrasonically applied heating iron.
- a smeared sealing layer was formed.
- an Fe-37 wt% Ni alloy wire (diameter 1.5 mm) with Ag plating was placed in a frame shape as a spacer on the sealing layer of one glass substrate.
- first substrate 11 and second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass. Next, 0.2% by weight 1 and 35% by weight 8 of the remaining material 32 are placed on the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13.
- a Sn alloy layer was formed by applying an Sn alloy using a heating iron with ultrasonic waves. At this time, the area where the glass and the iron hit the Ar atmosphere It was placed inside to reduce the oxidation of the Ti Bi—Sn alloy.
- a space of 20 mm was formed between the first substrate 11 and the second substrate 12, and heat treatment was performed in a vacuum of 5xlO — 6 Pa. After that, when the temperature reaches 200 ° C during the cooling process, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the position of the sealing material is aligned, and the Ti_Bi_Sn alloy becomes continuous on both surfaces. I did it. By cooling in this state and solidifying the alloy, a vacuum seal portion 31 was formed, and the side wall 13 and the first substrate were hermetically sealed.
- first substrate 11 and second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass. Next, Ag powder and frit glass powder are mixed at a weight ratio of 5: 5 by a screen printing device at the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13. A paste made by mixing the mixed composite material with a binder to give viscosity was printed at a width of 10 mm and a thickness of 10 ⁇ m. Then, the first substrate 11 and the side wall 13 were fired in an atmospheric furnace under predetermined conditions. Using a heating iron with an ultrasonic wave, the alloy of 0.4 wt% Ding 1 as the sealing material 32 and the remaining Sn A smeared sealing layer was formed.
- first substrate 11 and the second substrate 12 20 mm was opened, and heat treatment was performed in a vacuum of 5xlO — 6 Pa. After that, when the temperature reaches 200 ° C during the cooling process, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the position with the sealing material is aligned, and the Ti_Sn alloy is continuously connected to both surfaces. It was made to become. By cooling in this state and solidifying the alloy, the vacuum seal portion 31 was formed, and the side wall 13 and the first substrate were hermetically sealed.
- the surface of the glass substrate may be contaminated during the manufacturing process.
- a base layer is formed on the glass substrate in order to securely hold the molten sealing material during the vacuum heating on the glass substrate, and the top of the metal base layer is formed.
- a mixed layer of the sealing material and the metal underlayer can be formed, and the wettability of the sealing material can be further improved.
- the underlayer glass paste, metal paste, or metal thin film is suitable, and the metal material at that time preferably contains at least one of Ag, Ni, Fe, Cu, and Al.
- the SED has the same basic configuration as the SED according to the first embodiment shown in FIGS. 1 and 2, and only the configuration of the vacuum seal portion 31 is different. Therefore, description of the basic configuration is omitted, and only the configuration of the vacuum seal portion 31 will be described in detail.
- the vacuum seal portion 31 is provided on the first substrate 11. Sealing formed by a sealing material 32 between a predetermined position, that is, a rectangular frame-shaped position along the inner peripheral edge of the first substrate and a rectangular frame-shaped position along the end surface of the side wall 13 on the first substrate side. Has a layer.
- the inventors of the present application set characteristics to be possessed as a sealing material used for the vacuum seal portion 31, and conducted various experiments to find a material that satisfies the conditions.
- Sn or an alloy containing at least one element having a melting point lower than Sn for example, Ag, Au, Cu
- a sealing material containing at least one kind Metals with standard free energy for oxide formation lower than the standard free energy for oxide formation of Sn, for example, when Cr is added, Cr is oxidized before Sn in an atmosphere where Sn is oxidized, and the sealing material A Cr oxide film is formed on the surface. This suppresses the formation of SnO, a robust oxide. For this reason, the later substrate
- the Cr oxide film breaks easily, and a continuum of sealing material necessary for vacuum sealing can be obtained.
- Al, Si, etc. can be used in addition to Cr, and the addition amount is 0.001 to 2 wt. % Is desirable. Even if the amount is small, an oxide film of the additive element is formed on the surface of the sealing material. If the amount added is too large, the melting point of the sealing material will rise, exceeding the operating temperature range in the FED manufacturing process. In this case, sealing becomes difficult and the sealing performance is lowered.
- first substrate 11 and second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass. Next, an alloy of 1% by weight remainder Sn was applied as a seal material to the upper surface of the side wall 13 and the peripheral edge of the inner surface of the first substrate 11, that is, a predetermined position facing the side wall 13. At this time, the ultrasonic application heating core The tape was applied while applying ultrasonic waves to the sealing material.
- the first substrate 11 and the second substrate 12 opposed to spaced gap 100 mm was heat treated in a vacuum of 5x10- 6 Pa. After that, when the temperature reaches a temperature equal to or higher than the melting point of the sealing material in the cooling process, for example, 240 ° C, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the sealing material is aligned. It was made to be continuous on both sides. By cooling in this state and solidifying the sealing material, a vacuum seal portion 31 was formed, and the side wall 13 and the first substrate 11 were hermetically sealed.
- leakage quantity represents the following 1x10- 9 atm 'cc / sec, sufficient sealing effect It was found that In addition, it was clarified that the cracks in the glass substrate due to the sealing using the metal sheet material did not occur in both the measurement results and the appearance.
- a first substrate 11 and a second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, and one of them, for example, the glass on the inner peripheral edge of the second substrate, is prepared.
- a side wall 13 having a rectangular frame shape made of frit glass was joined. Then, the upper surface of the side wall 13, and inner surface peripheral edge portion of the first substrate 11, i.e., at a predetermined position facing the side wall 13, 0.5 wt% & ⁇ 3 wt% eight ⁇ as shea Lumpur material, the balance The Sn alloy was applied while applying ultrasonic waves to the sealing material using an ultrasonically applied heating iron. At this time, the substrate and the side wall were heated to 200 ° C.
- the first substrate 11 and the second substrate 12 opposed to spaced gap 100 mm was heated at a true air of 5x10- 6 Pa. After that, when the temperature reaches a temperature equal to or higher than the melting point of the sealing material in the cooling process, for example, 250 ° C, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the position of the sealing material is aligned. Was continuous on both sides. In this state, the substrate and the side wall were cooled to solidify the sealing material, thereby forming the vacuum seal portion 31 and hermetically sealing the side wall 13 and the first substrate 11.
- leakage quantity represents the following 1x10- 9 atm 'cc / sec, sufficient sealing effect It was found that In addition, both the measurement results and the apparent force revealed that no cracks occurred in the glass substrate due to sealing using a metal sheet material.
- first substrate 11 and second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass. Next, Ag: 70, low-melting glass: 25, polymer binder and viscosity adjusting agent in a weight ratio at the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, a predetermined position facing the side wall 13 Mixture of: A paste consisting of 5 was screen-printed and then fired under predetermined conditions to form a base. Thereafter, an alloy of 1% by weight ⁇ balance Sn was applied as a seal material on the base. At this time, a heating iron with an ultrasonic wave was applied and applied while applying ultrasonic waves to the sealing material.
- the first substrate 11 and the second substrate 12 opposed spaced gap 100 mm was heat treated in a vacuum of 5x10- 6 Pa. After that, when the temperature reaches a temperature equal to or higher than the melting point of the sealing material in the cooling process, for example, 240 ° C, the first substrate 11 and the second substrate 12 are brought into close contact with each other so that the position of the sealing material is aligned. Was continuous on both sides.
- a vacuum seal portion 31 was formed, and the side wall 13 and the first substrate 11 were hermetically sealed.
- leakage quantity represents the following 1x10- 9 atm 'cc / sec, sufficient sealing effect It was found that In addition, it was clarified that the cracks in the glass substrate due to the sealing using the metal sheet material did not occur in both the measurement results and the appearance.
- the FED includes a first substrate 11 and a second substrate 12 each made of a rectangular glass substrate, and these substrates have a gap of about 1.0 to 2. Omm. It is arranged in the opposite direction.
- the first substrate 11 and the second substrate 12 constitute a flat vacuum envelope 10 whose peripheral portions are joined to each other through a rectangular frame-shaped side wall 13 made of glass and the inside is maintained in a vacuum. .
- the side wall 13 functioning as a bonding member is sealed to the inner peripheral edge portion of the second substrate 12 by, for example, a low melting point glass 23 such as frit glass. As will be described later, the side wall 13 is sealed to the inner peripheral edge portion of the first substrate 11 by a vacuum seal portion containing a low melting point metal as a sheet material. Thus, the side wall 13 and the vacuum seal part hermetically bond the peripheral parts of the first substrate 11 and the second substrate 12 to define a sealed space between the first and second substrates.
- a low melting point glass 23 such as frit glass.
- the shape of the support member 14 is not particularly limited to this, and a columnar support member may be used.
- a phosphor screen 15 that functions as a phosphor screen is formed on the inner surface of the first substrate 11.
- the phosphor screen 15 includes a plurality of phosphor layers 16 that emit red, green, and blue light, and a plurality of light shielding layers 17 formed between the phosphor layers.
- Each phosphor layer 16 is formed in a stripe shape, a dot shape, or a rectangular shape.
- a metal back 20 and a getter film 19 made of aluminum or the like are sequentially formed.
- a large number of electron-emitting devices 22 that emit electron beams are provided as electron sources that excite the phosphor layer 16 of the phosphor screen 15. More specifically, a conductive force sword layer 24 is formed on the inner surface of the second substrate 12, and a silicon dioxide film 26 having a large number of cavities 25 is formed on the conductive cathode layer. Yes. On the silicon dioxide film 26, a gate electrode 28 made of molybdenum, niobium or the like is formed. Then, in each cavity 25 on the inner surface of the second substrate 12, the molybdenum A cone-shaped electron-emitting device 22 made of den or the like is provided.
- These electron-emitting devices 22 are arranged in a plurality of columns and a plurality of rows corresponding to each pixel.
- a large number of wirings 21 for supplying a potential to the electron-emitting devices 22 are provided in a matrix shape, and the end portions are drawn out of the vacuum envelope 10.
- the video signal is input to the electron-emitting device 22 and the gate electrode 28.
- a gate voltage of +100 V is applied when the luminance is highest.
- +10 kV is applied to the phosphor screen 15.
- the magnitude of the electron beam emitted from the electron-emitting device 22 is modulated by the voltage of the gate electrode 28, and this electron beam excites the phosphor layer of the phosphor screen 15 to emit light, thereby displaying an image.
- a high voltage is applied to the phosphor screen 15, high strain point glass is used for the glass plate for the first substrate 11, the second substrate 12, the side wall 13, and the support member 14. .
- the vacuum seal portion 31 is located along a predetermined position of the first substrate 11, that is, a rectangular frame position along the inner peripheral edge of the first substrate and an end surface of the side wall 13 on the first substrate side.
- a sealing layer formed of a sealing material 32 is provided between the rectangular frame-like position.
- the inventors of the present application set characteristics to be possessed as a sealing material used for the vacuum seal portion, and conducted various experiments to find a material that satisfies the condition. As a result, it was found that desired conditions can be satisfied by using a sealing material containing at least one kind of metal from Sn, Ag, Au and Cu. When Sn, Ag, Au, or Cu is added with at least one kind of metal, a strong oxide SnO is generated on the surface of the sealing material 32, that is, the surface of the sealing layer. Can be suppressed. For this reason, subsequent substrate stacking
- the oxide film formed on the surface of the sealing material 32 can be easily broken to obtain a continuous material of the sealing material necessary for the vacuum seal.
- the amount of Ag, Au, and Cu added to Sn is 0.1 to 10 wt%, and more preferably 0.5 to 4 wt%. Even if the amount is small, an oxide film of the additive element is formed on the surface of the sealing material 32. When there is too much addition amount, a sealing layer will become hard and weak and the sealing performance of a sealing part will fall.
- the configuration of the FED according to the third embodiment will be described in detail using examples.
- first and second substrates 11 and 12 made of glass plates having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass.
- glass frit powder, Ag powder (the weight of the glass frit and Ag) is placed on the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13.
- the cost was 1 to 1), and a glass paste made of a viscosity modifier was printed, and then fired under predetermined conditions to form the underlayer 33.
- sealing material 32 in this case, Sn, 3.5% Ag alloy was deposited on the base layer and welded to form a sealing layer.
- the first substrate 11 and the second substrate 12 opposed to spaced gap 100 mm was heat treated in a vacuum of 5x10- 6 Pa.
- a temperature equal to or higher than the melting point of the sealing material in the cooling process for example, 240 ° C
- the first substrate 11 and the second substrate 12 are brought into close contact with each other by aligning the positions of the sealing materials. To be continuous on the surface.
- a vacuum seal portion was formed, and the side wall 13 and the first substrate 11 were hermetically sealed.
- leakage quantity represents the following 1x10- 9 atm 'cc / sec, sufficient sealing effect It was found that In addition, both the measurement results and the appearance force revealed that no cracks occurred in the glass substrate due to sealing using a metal sealant.
- first and second substrates 11 and 12 made of glass plates having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass. Next, the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13, Lasfrit powder, Ag powder (the weight cost of glass frit and Ag is 1 to 2), and a glass paste that is a viscosity adjusting material were printed, and then fired under predetermined conditions to form an underlayer. Next, using a soldering iron provided with ultrasonic waves, the sealing material 32, here Sn, was deposited on the base layer and welded to form a sealing layer.
- the first substrate 11 and the second substrate 12 opposed to spaced gap 100 mm was heat treated in a vacuum of 5x10- 6 Pa. After that, when the temperature reaches a temperature equal to or higher than the melting point of the sealing material in the cooling process, for example, 240 ° C, the first substrate 11 and the second substrate 12 are brought into close contact with each other by aligning the positions of the sealing materials. The stratum was made continuous on both sides. By cooling in this state and solidifying the sealing material, a vacuum seal portion was formed, and the side wall 13 and the first substrate 11 were hermetically sealed.
- leakage quantity represents the following 1x10- 9 atm 'cc / sec, sufficient sealing effect It was found that In addition, when elemental analysis was performed on the vacuum seal part, both the metal part of the underlayer and the metal part of the sealing layer were SnAg alloys.
- a first substrate 11 and a second substrate 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, and one of them, for example, the glass on the inner peripheral edge of the second substrate, is prepared.
- a side wall 13 having a rectangular frame shape made of frit glass was joined.
- a glass paste made of a viscosity adjusting material was printed, and then fired under predetermined conditions to form an underlayer.
- the sealing material 32 here, Sn, 3.5% Ag, 0.5% Cu alloy was laminated and welded on the underlayer to form a sealing layer.
- the first substrate 11 and the second substrate 12 opposed to spaced gap 100 mm was heat treated in a vacuum of 5x10- 6 Pa.
- a temperature equal to or higher than the melting point of the sealing material in the cooling process for example, 240 ° C
- the first substrate 11 and the second substrate 12 are brought into close contact with each other by aligning the positions of the sealing materials.
- a vacuum seal portion was formed, and the side wall 13 and the first substrate 11 were hermetically sealed.
- leakage quantity represents the following 1x10- 9 atm 'cc / sec, sufficient sealing effect It was found that In addition, both the measurement results and the apparent force revealed that no cracks occurred in the glass substrate due to sealing using a metal sealant.
- the FED has the same basic configuration as that of the FED according to the third embodiment shown in FIGS. 5 and 6, and only the configuration of the vacuum seal portion 31 is different. Therefore, the description of the basic configuration is omitted, and only the configuration of the vacuum seal portion 31 will be described in detail.
- the vacuum seal portion 31 is a predetermined position of the first substrate 11, that is, a rectangular frame-shaped position along the inner peripheral edge of the first substrate. And a sealing layer 32 formed of a sealing material 32 between the side wall 13 and the rectangular frame-like position along the end face of the first substrate side.
- the inventors of the present application set characteristics to be used as a sealing material used for the vacuum seal portion 31, and conducted various experiments to find a seal structure that satisfies the conditions.
- first and second substrates 11 and 12 made of glass plates each having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-shaped side wall 13 made of glass was joined with frit glass. Next, an alloy of 0.4 wt.% As the seal material 32 and the remaining Sn is placed on the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13. A heating iron with an ultrasonic wave was applied to the paper and the sheet material while applying ultrasonic waves.
- a heat treatment was performed at baking, etc. in a vacuum chamber of 5x10- 6 Pa.
- a dummy substrate 52 made of, for example, a glass plate is disposed opposite to each substrate, here the second substrate 12 with a predetermined gap.
- the YAG laser light guided by the optical fiber 54 is passed through the transparent window 53 provided on the wall of the vacuum chamber 50 to seal the sealing material. Scanning while touching 32 surfaces.
- the oxide film existing on the surface of the sealing material 32 is scattered and removed. The scattered oxide film adheres to the dummy substrate 52 and is captured.
- the average output of the laser beam was 1.3 mJ (l pulse), the pulse half width: 120 ns, and the frequency 1 KHz. These values can be appropriately selected.
- the laser beam is moved by moving the laser beam and the substrate 12 relative to each other. In the example, the surface of the sealing material 32 was scanned over the entire circumference with a laser beam while moving the substrate 12. If the dummy substrate 52 becomes dirty after processing multiple substrates, clean the dummy substrate or replace it with a new dummy substrate.
- the sealing material 32 filled on the first substrate 11 is also the same as described above by laser light. Perform the process.
- the sealing material 32 filled in the first substrate 12 arranged in the vacuum chamber 50 is irradiated from the plasma generator 56 as shown in FIG.
- the oxide here, the oxide film may be removed by irradiation with the plasma.
- leakage quantity represents the following 1x10- 12 Pa'm 3 / sec, sufficient sealing It turned out to be effective.
- both the measurement results and the apparent force revealed that no cracks occurred in the glass substrate due to sealing using a metal sealant.
- first and second substrates made of glass plates that are 65cm in length and 110cm in width, respectively.
- One of them for example, a rectangular frame made of glass on the inner peripheral edge of the second substrate
- the side walls 13 were joined by frit glass.
- the upper surface of the side wall 13, and inner surface peripheral edge portion of the first substrate 11, i.e., at a predetermined position facing the side wall 13, the sealing member 32 to 0.5 wt% Rei_1 :, 3 wt% eight ⁇
- the remaining Sn alloy was applied to the seal material while applying ultrasonic waves using an ultrasonically applied heating iron. At this time, the substrate was heated to 200 ° C.
- the oxide film on the surface of the sealing material 32 was continuously removed by applying a carbon dioxide laser guided by a mirror to the sealing material 32 and moving the substrate. Both the sealing material 32 of the first substrate 11 and the sealing material 32 on the side wall 13 were subjected to the oxide film removal treatment by the laser.
- leakage quantity represents the following 1x10- 12 Pa'm 3 / sec, sufficient sealing It turned out to be effective.
- both the measurement results and the apparent force revealed that no cracks occurred in the glass substrate due to sealing using a metal sealant.
- first and second substrates 11 and 12 made of glass plates having a length of 65 cm and a width of 110 cm are prepared, of which: A rectangular frame-like side wall 13 made of lath was joined with frit glass. Next, Ag powder and frit glass powder are mixed at a weight ratio of 5: 5 by a screen printing device at the upper surface of the side wall 13 and the inner peripheral edge of the first substrate 11, that is, at a predetermined position facing the side wall 13. A paste made by mixing the mixed composite material with a binder to give viscosity was printed at a width of 10 mm and a thickness of 10 / im. Then, the first substrate 11 and the side wall 13 were fired in an atmospheric furnace under predetermined conditions, thereby forming an underlayer on the sealing portion.
- an alloy of 43 wt% 81 as the sealing material 32 and the remaining Sn is ultrasonically applied to the upper surface of the side wall 13 and the peripheral edge of the inner surface of the first substrate 11, that is, a predetermined position facing the side wall 13.
- coating was apply
- a voltage of, for example, 15 kV is applied between the sealing material 32 and the electrode 58 arranged to be opposed to the sealing material 32 by about 15 mm in a vacuum chamber 50 decompressed to several lOOPa. The discharge was generated and the oxide film on the surface of the sealing material 32 was continuously removed by scanning the substrate 12. Both the sealing material 32 on the first substrate 11 and the sealing material 32 on the side wall 13 were subjected to the oxide film removal process by the above discharge.
- leakage quantity represents the following 1x10- 12 Pa 'm 3 / sec , sufficient sealing It turned out to be effective.
- both the measurement results and the apparent force revealed that no cracks occurred in the glass substrate due to sealing using a metal sealant.
- the present invention is not limited to the above-described embodiments as they are, but can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
- the manufacturing method according to the fourth embodiment can be applied to any of the image display apparatuses shown in the first to third embodiments.
- the dimensions, materials, and the like of the side wall, the support member, and other components are not limited to the above-described embodiments, and can be selected as appropriate.
- the present invention is not limited to an electron source using a field emission electron emitting device or a surface conduction electron emitting device as an electron source, and an image display device using another electron source such as a carbon nanotube, and a vacuum inside. It can also be applied to other flat image display devices that are maintained.
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- Engineering & Computer Science (AREA)
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- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006548907A JPWO2006064880A1 (ja) | 2004-12-17 | 2005-12-15 | シール材、シール材を用いた画像表示装置、画像表示装置の製造方法、およびこの製造方法により製造された画像表示装置 |
EP05816520A EP1826799A1 (en) | 2004-12-17 | 2005-12-15 | Seal material, image display device using seal material, method of producing image display device, and image display device produced by the production method |
US11/763,514 US20070257598A1 (en) | 2004-12-17 | 2007-06-15 | Sealing material, image display device using the sealing material, method for manufacturing the image display device, and image display device manufactured by the manufacturing method |
Applications Claiming Priority (8)
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JP2004-366465 | 2004-12-17 | ||
JP2004366465 | 2004-12-17 | ||
JP2005-262558 | 2005-09-09 | ||
JP2005-262556 | 2005-09-09 | ||
JP2005262557 | 2005-09-09 | ||
JP2005262556 | 2005-09-09 | ||
JP2005262558 | 2005-09-09 | ||
JP2005-262557 | 2005-09-09 |
Related Child Applications (1)
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US11/763,514 Continuation US20070257598A1 (en) | 2004-12-17 | 2007-06-15 | Sealing material, image display device using the sealing material, method for manufacturing the image display device, and image display device manufactured by the manufacturing method |
Publications (1)
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WO2006064880A1 true WO2006064880A1 (ja) | 2006-06-22 |
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PCT/JP2005/023059 WO2006064880A1 (ja) | 2004-12-17 | 2005-12-15 | シール材、シール材を用いた画像表示装置、画像表示装置の製造方法、およびこの製造方法により製造された画像表示装置 |
Country Status (5)
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US (1) | US20070257598A1 (ja) |
EP (1) | EP1826799A1 (ja) |
JP (1) | JPWO2006064880A1 (ja) |
TW (1) | TWI287813B (ja) |
WO (1) | WO2006064880A1 (ja) |
Families Citing this family (6)
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DE102008045343A1 (de) * | 2008-09-01 | 2010-03-04 | Osram Gesellschaft mit beschränkter Haftung | Flachlampe mit elastischem Rahmen |
TWI421740B (zh) * | 2008-11-17 | 2014-01-01 | Au Optronics Corp | 觸控顯示面板及電子裝置之製造方法 |
DE102009054068A1 (de) * | 2009-11-20 | 2011-05-26 | Epcos Ag | Lotmaterial zur Befestigung einer Außenelektrode bei einem piezoelektrischen Bauelement und piezoelektrisches Bauelement mit einem Lotmaterial |
WO2012012745A2 (en) * | 2010-07-22 | 2012-01-26 | Ferro Corporation | Hermetically sealed electronic device using solder bonding |
RU2506335C1 (ru) * | 2012-06-13 | 2014-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Владимирский государственный университет имени Александра Григорьевича и Николая Григорьевича Столетовых" (ВлГУ) | Металломатричный композит |
US10647091B2 (en) * | 2013-04-27 | 2020-05-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Planar glass sealing structure and manufacturing method thereof |
Citations (5)
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JP2000106089A (ja) * | 1998-09-29 | 2000-04-11 | Mitsubishi Electric Corp | Ac面放電型プラズマディスプレイ装置、ac面放電型プラズマディスプレイパネル、同パネルの製造方法及びac面放電型プラズマディスプレイパネル用基板 |
JP2002203482A (ja) * | 2000-12-28 | 2002-07-19 | Toshiba Corp | 画像表示装置の製造方法 |
JP2002283093A (ja) * | 2001-03-27 | 2002-10-02 | Toshiba Corp | 非鉛系接合用合金 |
WO2004008471A1 (ja) * | 2002-07-15 | 2004-01-22 | Kabushiki Kaisha Toshiba | 画像表示装置、画像表示装置の製造方法、および製造装置 |
JP2004165001A (ja) * | 2002-11-13 | 2004-06-10 | Sony Corp | 平面型表示装置の製造方法 |
Family Cites Families (1)
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US20050179360A1 (en) * | 2002-07-15 | 2005-08-18 | Hisakazu Okamoto | Image display device, method of manufacturing image display device, and manufacturing apparatus |
-
2005
- 2005-12-15 JP JP2006548907A patent/JPWO2006064880A1/ja active Pending
- 2005-12-15 EP EP05816520A patent/EP1826799A1/en not_active Withdrawn
- 2005-12-15 WO PCT/JP2005/023059 patent/WO2006064880A1/ja not_active Application Discontinuation
- 2005-12-16 TW TW094144866A patent/TWI287813B/zh active
-
2007
- 2007-06-15 US US11/763,514 patent/US20070257598A1/en not_active Abandoned
Patent Citations (5)
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JP2000106089A (ja) * | 1998-09-29 | 2000-04-11 | Mitsubishi Electric Corp | Ac面放電型プラズマディスプレイ装置、ac面放電型プラズマディスプレイパネル、同パネルの製造方法及びac面放電型プラズマディスプレイパネル用基板 |
JP2002203482A (ja) * | 2000-12-28 | 2002-07-19 | Toshiba Corp | 画像表示装置の製造方法 |
JP2002283093A (ja) * | 2001-03-27 | 2002-10-02 | Toshiba Corp | 非鉛系接合用合金 |
WO2004008471A1 (ja) * | 2002-07-15 | 2004-01-22 | Kabushiki Kaisha Toshiba | 画像表示装置、画像表示装置の製造方法、および製造装置 |
JP2004165001A (ja) * | 2002-11-13 | 2004-06-10 | Sony Corp | 平面型表示装置の製造方法 |
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Publication number | Publication date |
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EP1826799A1 (en) | 2007-08-29 |
US20070257598A1 (en) | 2007-11-08 |
TW200634879A (en) | 2006-10-01 |
JPWO2006064880A1 (ja) | 2008-06-12 |
TWI287813B (en) | 2007-10-01 |
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