WO2004052799A1 - フラットパネルディスプレイ基板用ガラス及びフラットパネルディスプレイ基板 - Google Patents
フラットパネルディスプレイ基板用ガラス及びフラットパネルディスプレイ基板 Download PDFInfo
- Publication number
- WO2004052799A1 WO2004052799A1 PCT/JP2003/015113 JP0315113W WO2004052799A1 WO 2004052799 A1 WO2004052799 A1 WO 2004052799A1 JP 0315113 W JP0315113 W JP 0315113W WO 2004052799 A1 WO2004052799 A1 WO 2004052799A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- flat panel
- panel display
- display substrate
- substrate
- Prior art date
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/863—Vessels or containers characterised by the material thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/86—Vessels
- H01J2329/8605—Front or back plates
- H01J2329/8615—Front or back plates characterised by the material
Definitions
- the present invention relates to a glass for a flat panel display (hereinafter referred to as “FPD”) substrate and an FPD substrate, and particularly to a plasma display panel (hereinafter referred to as “PDP”) and a field emission panel (hereinafter referred to as “FEDJ”).
- FPD flat panel display
- PDP plasma display panel
- FEDJ field emission panel
- the present invention relates to a glass for an FPD substrate and an FPD substrate used as a front panel and a rear panel of an FPD utilizing discharges such as the above.
- FPDs such as PDPs, FEDs, and liquid crystal displays have been rapidly developed as large flat-panel televisions.
- PDP and FED are display devices that utilize discharge generated when an electric field is applied between internal electrodes.
- the PDP discharges in a low-pressure rare gas confined inside the panel, generating ultraviolet light from the rare gas to excite a predetermined phosphor and generating visible light rays to generate characters and characters.
- This is a method for displaying images such as figures.
- the FED is a display device of a type in which the inside of the panel is maintained in a high vacuum, and the phosphor is excited by an electron beam generated by applying an electric field in the high vacuum to generate visible light. .
- an address electrode made of silver (Ag) is formed on the rear substrate glass by a screen printing method or the like, and a dielectric glass is formed on the address electrode.
- the visible light reflecting layer and the glass partition are formed at a predetermined pitch.
- a phosphor layer is formed by arranging a phosphor paste for each color in each space sandwiched between these partitions, and the phosphor layer is baked at about 500, and the phosphor layer for each color is formed. Removes resin components etc. in the body base.
- a low melting glass frit for sealing the back substrate glass and the front substrate glass is applied around the back and plate glass, and the glass slit resin is applied. Preliminary firing at about 300 ° C. to remove the components.
- the glass for the front substrate on which the display electrode, the dielectric glass layer and the protective layer are formed, and the glass for the rear substrate are disposed so as to face each other via a partition so that the display electrode and the address electrode are orthogonal to each other.
- the air in the gap between the panels is evacuated and evacuated while being heated to about 300 ° C., and after evacuating and evacuating, the discharge gas is filled to complete the PDP.
- a glass for a PDP substrate As a glass for a PDP substrate, a glass having a large strain point and a large thermal expansion coefficient is widely used. Such a glass for a PDP substrate is generally produced by the float method, which has excellent flatness of the main surface and homogeneity of the glass composition and has high productivity. Since float glass is exposed to a hydrogen atmosphere during the production process, a reduced layer with a thickness of several m is formed on the glass surface, and this reduced layer has a tin ion derived from molten tin (hereinafter “Sn 2 + ”) Is known to exist.
- Sn 2 + tin ion derived from molten tin
- Ag + diffuses not only in the electrode formation part but also in the periphery thereof, and is reduced by Sn 2 + to produce a metal Ag colloid as described above, and is used for substrate.
- the glass often turned yellow and the display performance was impaired.
- Japanese Unexamined Patent Publication No. 10-2565569 discloses that the main surface of glass for a substrate manufactured by a float process is polished to reduce the reducing property generated on the main surface.
- a glass for an FPD substrate from which a foreign layer has been removed is disclosed.
- the glass for a substrate formed by the float method is exposed to a hydrogen atmosphere during the forming process, so that it is in contact with the surface (bottom surface) in contact with the tin (Sn) bath and the atmosphere side.
- a reduced layer with a thickness of several meters is formed on the main surface of the substrate glass, and a Sn 2+ diffusion layer is formed on this reduced layer.
- a phenomenon in which the Sn 2+ diffusion layer has a reducing property, and the Sn 2+ diffusion layer reduces iron in the glass, resulting in the. Bloom is also well known. Therefore, polishing and removing the Sn 2+ diffusion layer present on the main surface of the substrate glass is a technique that can be easily performed by those skilled in the art. However, measures to polish all of the glass for the substrate are not realistic because they are very costly.
- Japanese Patent Application Laid-Open No. H10-333481 discloses that the amount of Fe 20 contained in the glass for the front substrate is less than 2000 ppm, and the metal electrode is formed of A.
- a disclosed plasma display device is disclosed. 'Usually, the glass sheet molded by flow method, a for F e 2 0 3 amount of impurity levels feedthrough from the glass raw material is about 1 5 0 0 ppm, and the glass of that glass for PDP substrate Even when used, the yellowing due to the metal Ag colloid cannot be suppressed, and cannot be said to be a practical solution.
- a float glass for a display substrate containing at least one member selected from the group consisting of F, C1, Br and I is disclosed.
- JP-A-2 0 0 0 2 2 6 2 3 3 No. state are a total of 5 wt% or more N a 2 0, K 2 0 and the content of L i 2 0, 2 0 °
- a float glass having a specific gravity of 2.7 or less in C wherein the float glass before the silver treatment has a transmittance T ref at a wavelength of 410 nm and the float glass after the silver treatment.
- Float glass for a flat panel display substrate, where the absorbance A calculated from the transmittance T at a wavelength of 410 nm of A 10 g 10 (T / T ref) is 0.08 or less Is disclosed I have.
- the silver treatment means that the silver particles and the organic solvent are added to the surface of the float glass which is not in contact with the molten tin (top surface) in the float bath.
- the a g paste comprising a resin, and calcined 5 8 0 1 hour in air state, and are at least 1 Q mu m thick, the content of silver 9 5 weight 0/0 or more
- This is a process comprising forming a film on the surface of the float glass and removing the film from the surface of the float glass with nitric acid.
- Japanese Patent Application Laid-Open No. 2000-226263 states that “a glass having a smaller tin permeation amount into a glass has a lower color development, and therefore has a tin content as small as possible. It is merely a known fact, and a method for evaluating the yellowing of metal Ag by the colloid is not described, and has not reached a fundamental solution.
- An object of the present invention is to provide a glass for an FPD substrate and an FPD substrate that can suppress yellowing due to metal Ag colloid in view of the above-mentioned problems of the related art. . Disclosure of the invention
- a 2 0 under view and 6% by weight 96 containing N a 2 0 under view and 6% by weight 96, 5 6 0-5 8 0 strain point of less than ° C , 5 0 ⁇ 3 5 0 ° average thermal expansion coefficient 2 in the temperature range of 8 0 ⁇ 9 5 X 1 0- 7 Bruno ° C of C. 7 X 1 0 3 K g / m 3 have the following densities, Further, an FPD substrate glass having an optical basicity of 0.60 or less is provided.
- the this is weight 0/0 by K 2 0 / N value of a 2 0 2 or more.
- the base glass composition comprises:
- the basic glass composition does not substantially contain Ba0.
- an FPD substrate using the glass for an FPD substrate according to the 'first aspect of the present invention BEST MODE FOR CARRYING OUT THE INVENTION
- Na 20 enhances the solubility of the glass, reduces the melting load, and improves the productivity. There is. In addition, Na 20 increases the coefficient of thermal expansion and lowers chemical durability and electrical insulation. Furthermore, when attention is paid to the yellowing due to the metal Ag colloid, Na 20 is presumed to have a large effect on the yellowing.
- Opponents of donating electrons to Ag + in the glass are Sn 2+ and iron ion (F e 2+ ), but the inventors have reduced the electron donating property of the glass itself. It has been found that it is effective in suppressing the color development of Ag + .
- the optical basicity of glass is known. There are various theories indicating the acid and base coefficients of each element, and various values have been proposed, but not all elements have been determined. Therefore, there is a correlation with the electronegativity of the polling, and the basicity of the duffy and the program, which can be estimated with relatively high accuracy even for elements whose coefficients are unknown.
- the optical basicity of each glass composition was determined from the following equation (1) using a degree relaxation coefficient (basicity moderating parameter).
- the inventors have found a correlation between the optical basicity of some glass compositions and the yellowing due to the metal Ag colloid, and set the value of the optical basicity to 0. It was found that the yellowing due to the metal Ag colloid can be improved by setting it to 60 or less, especially from 0.57 to 0.60.
- N a 2 0 similarly to improve the solubility of the glass, to reduce the dissolved load increase productivity.
- N a 2 0 good effect is small is, to a thermal expansion coefficient rather large, chemical durability, reducing the electrical insulation.
- the behavior of K 2 0 is estimated to be different rather large and N a 2 0.
- K + Li Umui ON, N a + and contribute to I O-exchange with A g +
- K + very small again K + diffusion rate as compared to the N a + Therefore, it prevents Ag + from forming a diffusion layer to the deep part of the glass.
- K + once out of the glass prevents ion exchange between Na + and Ag + , so that the rate of penetration of Ag + into the glass can be suppressed and diffusion can be suppressed.
- the K 20 / Na 20 ratio in weight% is preferably 2 or more, particularly preferably in the range of 6 to 14.
- RO is at least one selected from Ca, Mg, Sr, and Ba
- Ca alkaline earth metal oxide
- the Ba ion ( Ba 2+ ) is more basic than other alkaline earth metal ions. Since the degree of relaxation coefficient a is small, it has the function of increasing the optical basicity. Addition of BaO increases the density of the glass. Therefore, in order to reduce the glass density to 2.7 or less, it is preferable that Ba0 is not substantially contained.
- B a O is industrially introduced as an impurity in other alkaline earth metal raw materials.
- substantially free of Ba0 refers to a content of 0.2% or less.
- Z r 0 2 is to rather large strain point, to have the function of improving the durability of the glass.
- Z rion ( Zr 4+ ) has a function of increasing the optical basicity because the basicity relaxation coefficient y is smaller than other network forming ions. Further, since the devitrification temperature of the glass increases and exceeds the forming temperature, the content of Zr02 is preferably 2.5 % or less.
- S i 0 2 (silica mosquito) is a main component forming the skeleton of glass.
- S i 0 content of 2 decreases the durability of the glass is less than 5 5%, greater than the dissolution of the glass 70% becomes difficult.
- a 1 2 0 3 is a component for improving the durability of the glass, glass melting becomes difficult when the content exceeds 596.
- Preferred correct range of A 1 2 0 3 is 0.2 to 2%.
- B 2 0 3 is for improvement of durability of glass or a component which is also used as a solubilizer.
- the content of B 2 0 3 exceeds 5%, the inconvenience during good Ru formed form the volatilization occurs, the upper limit of 5%.
- the glass having the composition range according to the present invention is preferably produced by a float process. Therefore, alkali metal or alkaline earth metal sulfate is usually used as a fining agent. In this case, the range of so 3 remaining in the glass is 0.
- the composition of the glass substrate of the present invention 5 0 ⁇ 3 5 0 ° Rights soaking expansion coefficient in the temperature range C is 8 0 ⁇ 9 5 X 1 0 - for a range of 7 Z ° C, heat It is possible to suppress the occurrence of cracks and cracks in the glass for substrates due to stress. Rights soaking expansion coefficient of 8 0 X 1 0 - 7 / ° C or less than 9 5 X 1 0 - The 7 ° C greater, and this aligning the average thermal expansion coefficient of peripheral materials becomes difficult.
- a raw material prepared so as to have a target composition is supplied to a melting furnace, vitrified, and formed into a transparent sheet glass having a predetermined thickness by a float method or the like. By doing so, it can be manufactured.
- a glass raw material having the composition shown in Table 1 was supplied to a standard glass melting furnace, melted, and formed into a plate shape by a float method, thereby producing a glass sample of this example.
- the strain point, average coefficient of thermal expansion, density, optical basicity, and change in absorbance before and after silver treatment of this glass sample were measured.
- the measurement of the strain point, the average coefficient of thermal expansion, and the density was performed using a generally known method.
- the change in absorbance before and after the silver treatment was measured according to the method described in Japanese Patent Application Laid-Open No. 2000-226263. table 1
- the glass samples of the present embodiment 5 7 strain point of 6 ° C, 8 4 X 1 0 -.
- Thermal expansion coefficient of 7 / ° C, ⁇ Pi 2 6 4 X 1 0 3 It had a density of K g / m 3 . Therefore, since the glass sample of this example has a high strain point, when used as a substrate for an FPD, the glass sample has excellent characteristics such as a small thermal contraction, a large coefficient of thermal expansion, and a low density. It is glass. Further, since the optical basicity is suppressed to 0.60 or less, the effect of suppressing the yellowing due to the metalloid Ag colloid is excellent.
- Comparative Example 1 is a typical soda-lime-silica glass having a glass composition outside the scope of the present invention. Glass of this composition has a coefficient of thermal expansion of 86 X Although it is within the range of the present invention at 10 ⁇ 7 / ° C, the strain point is 509 and the density is 2.49 ⁇ 10 3 g / m 3 , both of which are far from the range of the present invention. It was low. Comparative Example 2 is a typical glass composition for PDP substrates currently on the market. In Comparative Example 2, the optical basicity exceeded 0.60, indicating that the effect of suppressing the yellowing due to the metalloid Ag colloid was inferior. The density was as high as 2.78, which was outside the scope of the present invention.
- the distribution of silver after silver treatment was compared between the example and Comparative Examples 1 and 2.
- the thickness of the silver distribution layer contributing to the color development was smaller than in the comparative examples 1 and 2. From this, it was found that in the glass for a substrate of the example, the colloid of metal Ag was suppressed from diffusing into the glass and yellowing.
- a contact is, according to the FPD glass substrate of the present invention, containing N a 2 0 under view and 6% by weight, 5 6 0-5 8 0 strain point of less than ° C, 5 0 ⁇ 3 5 0 ° 8 0 ⁇ 9 5 X 1 0 in a temperature range of C - 7 / thermal expansion coefficient ° C, 2. 7 X 1 0 3 K g Zm 3 have the following densities, and, Since it has an optical basicity of 0.60 or less, when Ag paste is applied to the substrate glass and baked to form electrodes, the metal Ag colloid forms the substrate glass.
- the base glass composition displayed by Weight 0/0, 5 for 5-7 0% 3 1 0 2, 0.2 to 5% of the eight 1 2 0 3 , 0 to; L 5% MgO, 2 to 15% CaO, 0 to 15% SrO, 10 to 30% MgO + CaO + S r O + B a O, 0 ⁇ 5% of; L i 2 0, 0 ⁇ 6% of N a 2 0, 0 to 1 5% 1 (:, 0, 5-2 5% N a 2 0 + K 2 0, 0.
- the glass for a PD substrate of the present invention since the basic glass composition does not substantially contain Ba0, the glass density can be suppressed to 2.7 or less.
- the glass substrate for an FPD substrate of the present invention since the glass for an FPD substrate of the present invention is used, the glass substrate for FPD applications such as PDP and FED has a small heat shrinkage and excellent chemical durability. It is suitable.
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- Chemical & Material Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Glass Compositions (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002355083A JP2004182577A (ja) | 2002-12-06 | 2002-12-06 | フラットパネルディスプレイ基板用ガラス及びフラットパネルディスプレイ基板 |
JP2002-355083 | 2002-12-06 |
Publications (1)
Publication Number | Publication Date |
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WO2004052799A1 true WO2004052799A1 (ja) | 2004-06-24 |
Family
ID=32500777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/015113 WO2004052799A1 (ja) | 2002-12-06 | 2003-11-26 | フラットパネルディスプレイ基板用ガラス及びフラットパネルディスプレイ基板 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2004182577A (ja) |
KR (1) | KR20050084172A (ja) |
CN (1) | CN1720202A (ja) |
TW (1) | TWI276617B (ja) |
WO (1) | WO2004052799A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006137683A1 (en) | 2005-06-22 | 2006-12-28 | Kcc Corporation | High strain-point glass composition for substrate |
WO2020159704A1 (en) * | 2019-01-29 | 2020-08-06 | Corning Incorporated | Methods for reducing chromium oxidation state during processing of glass compositions |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006252828A (ja) * | 2005-03-09 | 2006-09-21 | Nippon Electric Glass Co Ltd | プラズマディスプレイパネル用ガラス基板 |
WO2011158366A1 (ja) * | 2010-06-17 | 2011-12-22 | 旭硝子株式会社 | ガラス基板及びその製造方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5631195A (en) * | 1994-09-14 | 1997-05-20 | Asahi Glass Company Ltd. | Glass composition and substrate for plasma display |
JPH1025129A (ja) * | 1996-07-12 | 1998-01-27 | Nippon Electric Glass Co Ltd | 基板用ガラス |
EP0853070A1 (en) * | 1996-07-10 | 1998-07-15 | NIPPON ELECTRIC GLASS COMPANY, Limited | Substrate glass and plasma display made by using the same |
-
2002
- 2002-12-06 JP JP2002355083A patent/JP2004182577A/ja active Pending
-
2003
- 2003-11-26 WO PCT/JP2003/015113 patent/WO2004052799A1/ja active Application Filing
- 2003-11-26 KR KR1020057010168A patent/KR20050084172A/ko not_active Application Discontinuation
- 2003-11-26 CN CNA2003801051617A patent/CN1720202A/zh active Pending
- 2003-12-02 TW TW092133846A patent/TWI276617B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5631195A (en) * | 1994-09-14 | 1997-05-20 | Asahi Glass Company Ltd. | Glass composition and substrate for plasma display |
EP0853070A1 (en) * | 1996-07-10 | 1998-07-15 | NIPPON ELECTRIC GLASS COMPANY, Limited | Substrate glass and plasma display made by using the same |
JPH1025129A (ja) * | 1996-07-12 | 1998-01-27 | Nippon Electric Glass Co Ltd | 基板用ガラス |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006137683A1 (en) | 2005-06-22 | 2006-12-28 | Kcc Corporation | High strain-point glass composition for substrate |
EP1893540A4 (en) * | 2005-06-22 | 2008-09-10 | Kcc Corp | GLASS COMPOSITION WITH HIGH RELAXATION POINT FOR A SUBSTRATE |
WO2020159704A1 (en) * | 2019-01-29 | 2020-08-06 | Corning Incorporated | Methods for reducing chromium oxidation state during processing of glass compositions |
Also Published As
Publication number | Publication date |
---|---|
JP2004182577A (ja) | 2004-07-02 |
TWI276617B (en) | 2007-03-21 |
TW200417527A (en) | 2004-09-16 |
CN1720202A (zh) | 2006-01-11 |
KR20050084172A (ko) | 2005-08-26 |
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