WO2007135874A1 - 透明電極付きガラス基板とその製造方法 - Google Patents
透明電極付きガラス基板とその製造方法 Download PDFInfo
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- WO2007135874A1 WO2007135874A1 PCT/JP2007/059781 JP2007059781W WO2007135874A1 WO 2007135874 A1 WO2007135874 A1 WO 2007135874A1 JP 2007059781 W JP2007059781 W JP 2007059781W WO 2007135874 A1 WO2007135874 A1 WO 2007135874A1
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- glass substrate
- transparent electrode
- thin film
- conductive film
- transparent conductive
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- 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
-
- 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
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
-
- 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
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
-
- 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
-
- 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
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
- C03C2218/328—Partly or completely removing a coating
- C03C2218/33—Partly or completely removing a coating by etching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24926—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including ceramic, glass, porcelain or quartz layer
Definitions
- the present invention relates to a glass substrate with a transparent electrode and a method for producing the same.
- a glass substrate with a transparent electrode formed by patterning a transparent conductive film made of a metal oxide or the like has been used as a computer, information appliance, various display devices, and the like.
- the laser patterning method is a method of processing or peeling a resist layer, a metal thin film layer, or the like formed on a substrate using laser light.
- laser patterning methods There are several types of such laser patterning methods. Among them, a thin film made of metal or the like formed on a substrate is directly irradiated with laser light through a mask having a desired opening. However, if the method of removing a part of the thin film and forming a desired pattern on the substrate can reduce the environmental aspect and the process, the viewpoint powers such as V and cost are particularly preferred. Such a method is also called a direct patterning method.
- the PDP has a structure including a transparent front substrate 1 and a rear substrate 2.
- the front substrate 1 has display electrodes 5a and 5b, bus electrodes 6 and black stripes 4 made of a transparent conductive film for generating plasma discharge on pixels forming an image on the front substrate 1.
- An address electrode 7 is provided.
- the front substrate 1 is provided with a dielectric material in order to secure insulation between the display electrodes 5a and 5b and the address electrode 7 and to stably generate plasma and to prevent the electrodes from being eroded by the plasma.
- Layer 8 and MgO protective layer 9 are provided.
- a cell is partitioned by a partition wall 3 formed between the transparent front substrate 1 and the back substrate 2 facing each other, and ultraviolet light emission with little visible light emission in the cell.
- a high-efficiency Pening gas mixture such as He + Xe or Ne + Xe.
- plasma discharge is generated between the display electrodes 5a and 5b to cause the phosphor layer 10 on the inner wall of the cell to emit light and form an image on the display screen (Patent Document 4, Non-Patent Document 1, Non-Patent Document 2). reference).
- the display electrodes 5a and 5b obtained by irradiating the transparent conductive film formed on the transparent front substrate 1 with laser light the display electrode 5a and 5b between them is placed on the front substrate 1 (irradiating the laser light with the transparent conductive film If there is a film residue on the exposed front substrate surface), current will flow between display electrode 5a and display electrode 5b, and plasma discharge will be difficult to occur. It becomes difficult to demonstrate performance.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-60432
- Patent Document 2 JP-A-2005-108668
- Patent Document 3 Japanese Unexamined Patent Publication No. 2005-135802
- Patent Document 4 JP-A-7-65727
- Patent Document 5 Japanese Unexamined Patent Publication No. 2000-114555
- Patent Document 6 Japanese Unexamined Patent Publication No. 2000-348611
- Patent Document 7 Japanese Unexamined Patent Publication No. 2000-348610
- Non-Patent Document 1 Tatsuo Uchida and Satoshi Uchiike, “Flat Dictionary of Flat Panel Displays”, Industrial Research Association, December 25, 2001, p. 583-585
- Non-patent literature 2 Ken Okumura, “Flat Panel Display 2004 Practice”, Nikkei Business Publications, p. 176-183 Disclosure of the invention
- Patent Document 5 when a glass substrate with a transparent electrode is manufactured by the direct patterning method, the glass substrate is irradiated with a laser beam having a low energy density, so that the laser beam of the transparent conductive film is irradiated. Although the portion remains on the glass substrate, it is possible to improve the production efficiency without causing wrinkles on the surface. However, if the remaining film portion on the glass substrate is etched by the above-described method, the resistance value of the formed transparent electrode increases and the surface roughness becomes high.
- the present invention aims to solve such problems, and in the case of manufacturing a glass substrate with a transparent electrode by a direct patterning method, a laser as in the conventional method is used. There is no film residue in the irradiated part, no wrinkles on the surface of the glass substrate, and the resistance value of the formed transparent electrode increases or the surface becomes rough.
- Another object of the present invention is to provide a method for producing a glass substrate with a transparent electrode, and a glass substrate with a transparent electrode produced by the production method.
- a glass substrate with a thin film pattern formed by irradiating a laser beam is an etching solution for dissolving the glass substrate
- the dissolution rate is A method for producing a glass substrate with a transparent electrode, comprising a step of etching using an etching solution having a property faster than a dissolution rate for dissolving the transparent conductive film (hereinafter referred to as glass etching solution)
- glass etching solution A method for producing a glass substrate with a transparent electrode, comprising a step of etching using an etching solution having a property faster than a dissolution rate for dissolving the transparent conductive film
- the present invention includes the following (1) to (9).
- the etching solution dissolves the glass substrate at 0.05 nmZmin or more, and contains ITO.
- the method for producing a glass substrate with a transparent electrode according to the above (1) which is an etching solution that dissolves at 002 nmZmin or less.
- the Enenoregi density of the laser beam used in the laser putter Jung is 22miZm m 2 or less, the above (1) to (3), the production method of the transparent electrode-coated glass substrate according to any misalignment.
- the glass substrate with a transparent electrode according to any one of the above (1) to (5), wherein the partial force with the transparent conductive film removed has a transmittance of 95% or more in a wavelength range of 400 nm to 700 nm. Manufacturing method.
- the transmittance means that when the transmittance of glass is 100% in a microspectrophotometer.
- a glass substrate with a transparent electrode produced by the method for producing a glass substrate with a transparent electrode according to any one of (1) to (7) above.
- a glass substrate with a transparent electrode is manufactured by a direct patterning method.
- the film residue of the portion irradiated with the laser beam does not occur unlike the conventional method
- the surface of the glass substrate does not have flaws
- the resistance value of the formed transparent electrode is the same as that of the conventional method. It is possible to provide a method for producing a glass substrate with a transparent electrode, which does not increase as in the case and the surface roughness does not increase.
- the energy density of the laser beam can be lowered, and the irradiation area can be increased with the laser having the same output, so that tact increase and cost reduction can be realized.
- FIG. 1 (A) is a schematic view showing the film surface of the glass substrate with a transparent electrode in the examples and comparative examples on the side where the thin film pattern 12 is attached, and FIG. It is a side view.
- FIG. 2 is a schematic diagram showing a schematic configuration of a conventional PDP.
- the manufacturing method of the glass substrate with a transparent electrode which comprises a pattern formation process and an etching process is demonstrated.
- the pattern forming step included in the production method of the present invention is a step of forming a transparent conductive film on a glass substrate and then applying laser patterning to obtain a glass substrate with a thin film pattern.
- the glass substrate is not particularly limited, and for example, various glass substrates (soda lime glass, non-alkali glass, etc.) that have been conventionally used as electrode substrates can be used.
- various glass substrates such as soda glass, non-alkali glass, etc.
- One preferred embodiment is a high strain point glass for PDP.
- the size and thickness are not particularly limited. For example, lengths of about 400 to 300 Omm can be preferably used for the length and width. The thickness is preferably 0.7-3. Omm, more preferably 1.5-3. Omm force! / !.
- the material of the transparent conductive film formed on such a glass substrate is not particularly limited as long as it is generally transparent and has electrical conductivity.
- the material of the transparent conductive film is, for example, indium oxide, tin oxide, zinc oxide, ITO (indium oxide doped with acid ⁇ tin), ATO (acid ⁇ tin doped with acid ⁇ antimony), AZO (acid ⁇ )
- ITO indium oxide doped with acid ⁇ tin
- ATO acid ⁇ tin doped with acid ⁇ antimony
- AZO ascid ⁇
- the material of the transparent conductive film is preferably composed mainly of at least one selected from the group forces of ITO, soot, tin oxide, and zinc oxide.
- the transparent conductive film preferably contains at least one selected from ITO, ATO, and a group force that also has an acid strength, preferably 80% by mass or more, more preferably 95% by mass or more, and more preferably 99% by mass. More preferably, it is contained.
- the material of the transparent conductive film preferably contains 80 to 99% by mass of indium oxide, tin oxide or zinc oxide and the balance is a dopant material. Further, 80 to 99 of indium oxide is preferable. It is preferable to use a material that is contained by mass and the balance being a dopant material. Further, a material that contains 80 to 99% by mass of indium oxide and the remainder is acid-tin tin is preferred. The reason is that the specific resistance is low and the visible light transmittance is high, so that it has excellent characteristics as a transparent electrode.
- the thickness of the transparent conductive film is not particularly limited. However, if it is too thin, the resistance of the transparent electrode formed by patterning this transparent conductive film becomes high. For example, when used as a PDP front substrate, the plasma discharge tends to be stable and not discharged. Therefore, it is preferable that the thickness is such that such a phenomenon does not occur. Conversely, if it is too thick, the material cost increases and the cost increases, and the transmittance tends to decrease and the luminance tends to decrease. Accordingly, the thickness of the transparent conductive film is preferably about 50 to 250 nm.
- the transparent conductive film may be a laminated film composed of a plurality of films!
- this transparent conductive film can have one kind of material strength or different kinds of material strength.
- this transparent conductive film has a predetermined sheet resistance and specific resistance or less for each material.
- the specific resistance value is too high, the plasma discharge tends to be stably discharged.
- the sheet resistance is preferably 30 ⁇ or less and the specific resistance value ⁇ 10 _4 ⁇ 'cm or less.
- the sheet resistance is 16 ⁇ or less, the specific resistance value. Is more preferably 2.1 X 10 _4 ⁇ 'cm or less.
- the sheet resistance is 250 ⁇ or less and the specific resistance value is 3.3 ⁇ 10 ” 4 ⁇ 'cm or less.
- the sheet resistance force is less than 00 ⁇ and the specific resistance value is 2. 6 ⁇ 10 " 4 ⁇ 'cm or less is more preferable.
- the method for forming such a transparent conductive film on the glass substrate is not particularly limited, and for example, a conventionally known method can be applied.
- Conventionally known methods include physical vapor deposition (PVD) (vacuum vapor deposition, ion plating, sputtering, etc.), chemical vapor deposition (CVD) (thermal CVD, plasma CVD, photo CVD, etc.) , Ion beam evaporation method, baking method (spray method), and liquid phase film formation method.
- Film forming conditions in such a method are not particularly limited.
- a target is indium oxide doped with zinc oxide, and an argon-oxygen mixed gas is used as an atmosphere gas at the time of film formation.
- an atmosphere gas is used as an atmosphere gas at the time of film formation.
- Set the temperature to 100 to 500 ° C, and set the other deposition conditions to the normal range.
- a thin film of indium oxide doped with acid tin can be formed on the glass substrate.
- the transparent conductive film is formed on the glass substrate, but there are others between the glass substrate and the transparent conductive film. It is possible to form a thin film.
- the alkali component contained in the glass substrate may diffuse into the transparent conductive film and affect its resistance value.
- a diacid key film or the like may be formed as an alkali barrier layer between the glass substrate and the transparent conductive film.
- the method for forming another thin film such as an alkali barrier layer is not particularly limited, and for example, a conventionally known method can be applied. Examples of conventionally known methods include the same methods as those for forming the transparent conductive film.
- the thickness of the other thin film is not particularly limited.
- the alkali barrier film it is preferably 10 to 500 nm from the viewpoint of alkali barrier properties and cost! /.
- the pattern forming step included in the manufacturing method of the present invention after forming the transparent conductive film on the glass substrate in this manner, laser patterning is performed to obtain a glass substrate with a thin film pattern.
- laser patterning is a method of forming a desired pattern on the substrate by irradiating the transparent conductive film formed on the glass substrate with laser light and removing a part of the thin film.
- the transparent conductive film formed on the glass substrate is directly irradiated with laser light through a mask having a desired opening, and a part of the thin film is removed to form a desired film on the substrate.
- a direct patterning method for forming a pattern can be mentioned.
- the type of laser light used in laser patterning is not particularly limited, and can be appropriately selected depending on the type of the transparent conductive film that is irradiated with laser light to remove a part thereof.
- CO laser light CO laser light
- YVO laser light excimer laser light
- Nd—YA Nd—YA
- Nd—YAG laser light is preferably used, and the fundamental wave (1064 nm) of Nd—YAG laser can be preferably used as the wavelength. . This is because high output and stable laser light can be obtained at low cost.
- the energy density of the laser beam to be irradiated is preferably at 22MjZmm 2 or less, it is still more favorable preferable and more preferably tool 18 ⁇ 20MjZmm 2 is 18 ⁇ 22mjZmm 2.
- the glass substrate is less likely to be wrinkled by laser light irradiation, and the portion to be removed of the transparent conductive film can be further removed by an etching process described later. That's it.
- the energy density in the case of multiple irradiations shall be calculated as the irradiation time by simply summing the irradiation times in each irradiation.
- a glass substrate with a thin film pattern can be obtained by such a pattern forming step.
- the etching process included in the production method of the present invention is a process of etching the glass substrate with a thin film pattern using an etching solution for glass.
- the laser patterning method itself is well known, and is a highly expected method as a patterning method that replaces the conventional wet method.
- the wet method is a method of forming a transparent conductive film on a glass substrate and patterning the film using a photolithographic method, and is still widely used industrially today.
- this wet method requires many steps such as exposure and cleaning, and there are also problems with waste liquid treatment, laser patterning that does not have these problems has attracted attention.
- This method is suitable as a method for etching a transparent conductive film for solar cells, but for example, as a method for post-patterning a transparent conductive film on a PDP front plate. Because this method dissolves the transparent electrode itself, the surface of the transparent conductive film that forms the electrode that should not be dissolved by patterning is also etched, so the resistance value of the transparent electrode is reduced. When it is used as a PDP front substrate, the drive voltage increases, power consumption increases, and plasma discharge tends to become unstable. As described above, since the transparent conductive film remains in a dissolved state in the glass, even if an etching solution for the transparent conductive film is used, removal of a part of the film may not be possible. It is not possible to prevent film residue.
- the etching of the transparent electrode surface can be minimized, and it is particularly useful as a PDP front substrate.
- there is no film residue and patterning is possible regardless of the type of transparent electrode.
- the glass etchant used in the etching step of the production method of the present invention is an etchant that dissolves the glass substrate, and its dissolution rate force is higher than the dissolution rate that dissolves the transparent conductive film.
- this etching solution dissolves a glass substrate to be used (for example, high strain point glass for PDP) at 0.05 nmZmin or more by a melting treatment described below, and uses a transparent conductive film (for example, an etching solution that dissolves an ITO thin film) at 0.002 nmZmin or less is preferable.
- the etching solution dissolves the glass substrate used at 0.1 InmZmin or more, and it is further preferable that the etching solution dissolve at 0.15 nmZmin or more.
- Such an etchant is preferred in terms of productivity.
- this etching solution dissolves the transparent conductive film to be used at 0.0015 nmZmin or less. It is further preferable that this etching solution dissolves at 0.001 OnMZmin or less. Such an etchant is preferable because the influence (load) on the transparent conductive film during the etching process is further reduced.
- the ratio of the rate at which the glass substrate used by the glass etching solution dissolves (glass substrate dissolution rate) to the rate at which the ITO thin film used by the glass etching solution dissolves (ITO thin film dissolution rate) (glass substrate).
- the dissolution rate (ZITO thin film dissolution rate) is preferably 25 or more, more preferably 75 or more, and even more preferably 150 or more. This is because the influence (load) on the transparent conductive film during the etching process can be further reduced, and the remaining film can be effectively prevented.
- the glass substrate is washed with pure water and then dried.
- a positive resist (manufactured by Fuji Film Arch Co., Ltd.) is spin-coated at 500 rpm for 5 seconds on the surface of this glass substrate, and then heated at 105 ° C for 30 minutes, followed by heating at 105 ° C for 30 minutes. Form.
- exposure is performed for 2 seconds.
- the resist pattern is formed by immersing in 0.5 mass 0 / o NaOH aqueous solution at 20 ° C for 1 minute and developing.
- the glass substrate having the resist pattern formed on the surface in this manner is immersed in an etching solution for 60 minutes.
- the shape measuring instrument (DEKTAK3) shows the boundary between the part of the glass substrate that has been subjected to such a melting process and that has not been covered with the resist and has been etched and the part that has been covered with the resist and has not been etched. — Measure the shape using ST, manufactured by Veeco. Then, the amount of erosion of the glass substrate at the boundary portion (the length of erosion in the direction perpendicular to the surface of the glass substrate (depth from the surface of the glass substrate)) was measured. Is calculated.
- the glass substrate dissolution rate is a dissolution rate calculated from the erosion amount obtained by performing the above-described dissolution treatment and performing such measurement.
- the ITO thin film was formed on the surface of the glass substrate by the above method.
- a glass substrate with an ITO thin film is used.
- this glass substrate with a thin film is subjected to the same melting treatment as that of the above glass substrate, and the amount of erosion is measured by the same measuring method to calculate the dissolution rate.
- the soot thin film dissolution rate is a dissolution rate calculated by performing the above-described dissolution treatment using the glass substrate with soot thin film and performing such measurements to calculate the erosion amount force.
- the glass etchant is preferably an etchant having the ability to dissolve the glass substrate and the thin film at the above speed when such dissolution treatment is performed.
- a preferable etching solution having such performance is 40 ° C. and 1 mass. / oNaOH aqueous solution.
- glass etchants include 60 ° C, 1 mass 0 / oNa CO,
- the glass substrate dissolution rate and the ITO thin film dissolution rate were 0.577 nm / min and 0.001 nmZmin or less, respectively.
- an aqueous solution of 0.5% by mass NH 4 at 40 ° C. is used as an etching solution for glass.
- the glass substrate dissolution rate and the ITO thin film dissolution rate are 0.206 ⁇ mZmin and 0.001 nm / min, respectively.
- the ITO thin film dissolution rate of aqua regia (nitric acid 100 ml + pure water 1000 ml + hydrochloric acid (HC135%) 1000 ml) at 40 ° C is 45.7 nmZmin, and the glass substrate dissolution rate is below that.
- the dissolution rate of the ITO thin film in an acidic aqueous solution containing iron chloride at 40 ° C 1000 ml of hydrochloric acid (HC135%) + 1000 ml of pure water + 500 ml of 40% iron (III) chloride) is 24.4 nmZmin. Was less than that.
- the type of the etching solution is not limited as long as it has the above properties.
- the etching solution include inorganic alkali solutions and organic alkali solutions.
- the inorganic alkali contained in the inorganic solution include NaOH, Na 2 CO, and fluorine.
- the etching solution contains at least one selected from the group power, and more preferable is an etching solution containing NaOH.
- the concentration of the etching solution is not particularly limited. Any material having the above properties may be used.
- an etching method using such an etching solution is not particularly limited.
- the treatment temperature, treatment time, treatment method (immersion method, spray method, etc.), etc. can be carried out in the usual range.
- concentration of the aqueous NaOH solution is preferably 0.2 to 10% by mass, particularly 0.5 to 5% by mass, and more preferably 1 to 5% by mass.
- the 1% Na by adjusting the glass substrate with a thin film pattern to 10 to 90 ° C, preferably 40 to 80 ° C, more preferably 50 to 70 ° C, and even more preferably 55 to 65 ° C.
- the concentration of the aqueous Na 2 CO solution should be 0.2-10% by mass, especially 0.5-5% by mass.
- the glass substrate with a thin film pattern is preferably immersed in a 0.5% by mass aqueous ammonium fluoride solution adjusted to 10 to 60 ° C., preferably 20 to 45 ° C. This is one of the specific embodiments.
- the concentration of the aqueous ammonium fluoride solution is preferably 0.2 to 10% by mass, more preferably 0.4 to 2% by mass.
- the transparent conductive film in the glass substrate with the thin film pattern should be removed without further increasing the resistance value of the transparent electrode and further increasing the surface roughness by the etching process using the glass etching solution. The remaining part can be removed more completely
- the production method of the present invention is a method for producing a glass substrate with a transparent electrode, comprising the pattern forming step and the etching step described above.
- the resistance value of the transparent electrode is increased or the transparent electrode has no wrinkles due to laser light irradiation and no film residue remains. It can be manufactured without increasing the surface roughness. Therefore, PDP It can also be preferably used as a front substrate.
- “there is no film residue” means a state where the insulation resistance value measured with the laser patterning portion sandwiched by the method described in the examples described later is 20 M ⁇ or more. Shall. This is because in this state, the discharge of the part sandwiching the patterning part is suitable.
- the resistance value of the transparent electrode does not increase.
- the sheet resistance value measured by a method similar to the method described in Examples described later is used. This means that the increase is 5% or less before and after the etching treatment in the production method of the present invention.
- the surface roughness of the transparent electrode does not increase means that the surface roughness (Ra) measured by the same method as described in the examples described later is the production of the present invention. It means that the increase is 10% or less before and after the etching process in the method.
- a PDP front substrate can be manufactured.
- a bus electrode is formed by applying, for example, a conventionally known photolithography etching process or a lift-off method, and a dielectric material is applied on the upper surface thereof.
- the PDP front substrate can be manufactured by forming a dielectric layer.
- an etching process can also be performed after the bus electrode is formed.
- the etching process included in the production method of the present invention may also serve as a cleaning process! /.
- the etchant is used by using the etching solution that also has the ability to clean the surface of a glass substrate with a thin film pattern. Can also be performed.
- a 1000 mm X 650 mm high strain point glass for PDP (PD200 manufactured by Asahi Glass) was prepared as a glass substrate. Then, an ITO film was formed on the surface of the glass substrate by DC magnetron sputtering so that the film thickness became 130 nm.
- the target used was an indium oxide target doped with 10% by mass of acid tin.
- the glass substrate temperature during film formation is 250. C, and Ar—O mixed gas was used as the snotter gas. Composition of the formed film
- the glass substrate having the ITO thin film (transparent conductive film) thus obtained on the surface is hereinafter referred to as a glass substrate with an ITO thin film.
- FIG. 1 shows a laser patterning part 13 formed on the glass substrate 11 by performing laser patterning with a width of 100 m in the center of the long side of the ITO thin film on the glass substrate with the ITO thin film, approximately parallel to the short side.
- the figure which formed the thin film pattern 12 (12a, 12b) is shown.
- FIG. 1 (A) is a view showing the film surface of the glass substrate 20 with a thin film pattern on the side to which the thin film pattern 12 is attached
- FIG. 1 (B) is a view showing a cross section of the glass substrate 20 with a thin film pattern.
- a laser is formed in a short cross-section by a homogenizer or the like, and irradiates the substrate.
- the laser patterning conditions were as follows: laser beam wavelength: 1064 nm, laser width: 100 m, laser length: 100 m, laser pulse width 120 ns, laser irradiation frequency 10 KHz, and overlap during laser irradiation 10 m. Laser irradiation was performed once at one location.
- the energy density during the laser putter Jung an energy density that put in one irradiation of the laser 15.
- OmniJ / mm 2 from 36. to 7 steps varied from 3mmJ / mm 2, at an energy density of each Laser patterning is performed, and the glass substrate with thin film pattern 20 is Obtained.
- a glass substrate with a thin film pattern subjected to laser patterning at each energy density was immersed in a 3 mass% solution of NaOH (sodium hydroxide) at 50 ° C. for 2 minutes.
- NaOH sodium hydroxide
- the substrate obtained by performing such an etching treatment is hereinafter referred to as a glass substrate with a transparent electrode.
- FIG. 1 is a diagram showing a glass substrate 20 with a thin film pattern, and is not a diagram showing a glass substrate with a transparent electrode, but the structure is generally the same (specifically, 1 is a glass substrate with a transparent electrode using the thin film pattern 12 of the glass substrate 20 with a thin film pattern in FIG. 1 as a transparent electrode).
- the laser patterning section 13 in FIG. 1 must have sufficiently strong insulation, and the insulation resistance value of the laser patterning section 13 must be 20 M ⁇ or more. It is!
- the reduction amount of the thin film was calculated.
- the thickness of the thin film was measured with a shape measuring instrument (DEKTAK3-ST, manufactured by Vee co).
- the amount of film reduction is preferably 0.1 nm or less, and particularly preferably 0.05 nm or less.
- Arithmetic mean height Ra specified in JIS B0601 (2001) is calculated using the atomic force microscope (Nano Scope Ilia; Scan Ratel. 0Hz, Sample Lines256, Off—line Modify Flatten order—2, Planefit order—2, (A product of Digital Instruments) [Thus, it was determined by measuring an arbitrary measurement area (5 m ⁇ 5 m) of the transparent electrode of the glass substrate with the transparent electrode.
- the surface roughness Ra is preferably 2.5 nm or less.
- a glass substrate with a transparent electrode is used as a PDP front substrate, for example, if the surface roughness Ra is too high, dielectric erosion increases, driving voltage increases, power consumption increases, and plasma discharge becomes unstable. This is because there is a tendency to become.
- the sheet resistance value is preferably 30 ⁇ or less, more preferably 16 ⁇ or less. This is because when a glass substrate with a transparent electrode is used as, for example, a PDP front substrate, if this sheet resistance is too high, the driving voltage increases, power consumption increases, and the plasma discharge tends to become unstable.
- Microscopic spectrophotometer (MCP manufactured by Otsuka Electronics Co., Ltd.)
- the measured diameter of the transmittance is about 40 / zm, and the glass substrate with ITO film is 100% of the intensity of light transmitted through the high strain point glass for PDP (PD200 made by Asahi Glass), which is V-thick after ITO film formation.
- the transmittance of was measured. The transmittance was measured in the wavelength range from 400 nm to 700 nm, and the transmittance at the wavelength of 550 nm is shown in Table 1 as a representative point.
- the step is 2 nm or less, the change in impedance does not become a problem and the discharge characteristics are not affected.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 1 except that the immersion was changed to 3 minutes. Then, the same evaluation as in Example 1 was performed. The results are shown in Table 1.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 1 except that the immersion was changed to 2 minutes. Then, the same evaluation as in Example 1 was performed. The results are shown in Table 1.
- Example 1 The same evaluation as in Example 1 was performed without etching the glass substrate with a thin film pattern obtained in Example 1. The results are shown in Table 1.
- the insulation resistance value was 36.3 mmJ / mm 2 or more, and the force was OL (over load, the same applies hereinafter) (20 ⁇ or more).
- OL over load, the same applies hereinafter
- an energy density of 30 mjZmm 2 or more is necessary to achieve a resistance value of 10 ⁇ or more ”.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 1 except that the glass substrate with a thin film pattern was changed to be immersed in pure water at 40 ° C for 1 minute. Then, the same evaluation as in Example 1 was performed. The results are shown in Table 1.
- Insulation resistance unchanged from Comparative Example 1 is also 36.3 mmJ / mm 2 or more OL (20 ⁇ ⁇ or more) It remained.
- a glass substrate with a thin film pattern is mixed with an acidic aqueous solution containing iron chloride at 40 ° C (hydrochloric acid (HC135%) 1000 ml + pure water 1000 ml + 40% iron (III) chloride 500 ml (hereinafter referred to as “iron chloride working solution”). )) Except that the substrate was immersed for 15 seconds in the same manner as in Example 1 to obtain a glass substrate with a transparent electrode. Then, the same evaluation as in Example 1 was performed. The results are shown in Table 1.
- Examples 1 to 3 are examples in which a transparent electrode made of an ITO film was treated with an etching solution for glass.
- the insulation resistance value is 18. OmmJ / mm 2 or more and OL (20 ⁇ ⁇ or more), which is considerably lower than Comparative Example 1! It is strong enough for the PDP to function properly at energy density! Insulation was obtained. Even when the etching process is performed, the film thickness, resistance (sheet resistance), and surface roughness (Ra) of the transparent electrode made of the ITO film are not changed, and good values are maintained. In addition, no defects are observed on the glass substrate. In addition, the transmittance of the laser-etched portion is as good as 95% or more, and the step difference of the joint is 2 or less. For example, it has excellent characteristics as a transparent electrode for PDP.
- Comparative Examples 1 and 2 are not preferred because they do not perform any particular treatment and require a very high laser output for patterning, and wrinkles are observed on the glass substrate.
- the laser etched portion has a transmittance of 76-77% or more, and the step difference of the joint is 10nm or more. Therefore, stable discharge characteristics cannot be obtained. For example, it is not suitable as a transparent electrode for PDP.
- Comparative examples 3 and 4 are comparative examples in which the ITO film was treated with an etching solution for etching. Insulation resistance is 18. Ommi / mm 2 as in Examples 1 to 3, OL (20 ⁇ or more) is there.
- the transparent electrode made of the ITO film is etched, the sheet resistance increases and the surface roughness also increases. For example, as a transparent electrode for PDP, the driving power increases and the discharge becomes unstable. Therefore, it is an inappropriate processing method.
- a glass substrate similar to that in Example 1 was prepared.
- An ATO film was formed on this glass substrate by DC magnetron sputtering so that the film thickness would be 130 nm.
- the target was an acid / tin tin target doped with 3% by mass of acid / antimony as a whole.
- the sample substrate temperature during film formation is 200 ° C, and the sputtering gas is Ar—O mixed gas.
- the pattern formation step and the etching step were performed in the same manner as in Example 1, and the same evaluation as in Example 1 was performed.
- the results are shown in Table 2.
- the sheet resistance value is preferably 250 ⁇ or less, more preferably 200 ⁇ or less.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 4 except that the immersion was changed to 3 minutes. Then, the same evaluation as in Example 4 was performed. The results are shown in Table 2.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 4 except that the immersion was changed to 2 minutes. Then, the same evaluation as in Example 4 was performed. The results are shown in Table 2.
- Example 4 The same evaluation as in Example 4 was performed without etching the glass substrate with a thin film pattern obtained in Example 4. The results are shown in Table 2.
- the insulation resistance value was 24.8 mmJ / mm 2 or more, and it was OL (20 ⁇ or more).
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 4 except that the glass substrate with a thin film pattern was changed to be immersed in pure water at 40 ° C for 1 minute. Then, the same evaluation as in Example 4 was performed. The results are shown in Table 2.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 4 except that the glass substrate with a thin film pattern was changed to be immersed in an aqua regia etchant for 15 seconds. Then, the same evaluation as in Example 4 was performed. The results are shown in Table 2.
- a glass substrate with a transparent electrode was obtained in the same manner as in Example 4 except that the glass substrate with a thin film pattern was changed to be immersed in a salted pig iron etching solution for 15 seconds. The same evaluation as in Example 4 was performed. The results are shown in Table 2.
- Examples 4 to 6 are examples in which the glass was treated with an etching solution for etching glass.
- the ATO film has almost no change in characteristics such as film loss and surface roughness.
- the energy density of laser light is 1 8. Ommi / mm 2 or more, and the insulation resistance value is OL (20 ⁇ ⁇ or more), which is very low energy. It is high enough for the PDP to function properly at the density! Insulation is obtained, and no defects are found on the glass substrate.
- the transmittance of the laser etched portion is as good as 95% or more, and the joint step is 2 or less. For example, it has excellent characteristics as a transparent electrode for PDP.
- Comparative Examples 5 and 6 are not particularly treated, and therefore require a very high laser output for patterning, which is preferable because wrinkles are seen on the glass substrate. Absent.
- the transmittance of the laser-etched part is 70% or less, and the step between the joints is very low. Large and stable discharge characteristics cannot be obtained.
- V for example, not suitable as a transparent electrode for PDP!
- Comparative Examples 7 and 8 are comparative examples treated with an etching solution for etching ITO. Since these etchants cannot etch either glass or ATO, there is no difference from Comparative Example 5 (an example that has not been etched), and the energy density at which the insulation resistance value is OL (20 ⁇ or more) is also high. The glass substrate is wrinkled, which is not preferable.
- the film residue of the portion irradiated with the laser beam and the surface of the glass substrate may be wrinkled, the resistance value of the transparent electrode may be increased, and the roughness of the surface may be increased. Therefore, it is suitable as a PDP front substrate.
Abstract
Description
Claims
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KR1020087021644A KR101419068B1 (ko) | 2006-05-18 | 2007-05-11 | 투명 전극 부착 유리 기판과 그 제조 방법 |
JP2008516601A JP5115476B2 (ja) | 2006-05-18 | 2007-05-11 | 透明電極付きガラス基板とその製造方法 |
CN2007800174590A CN101443858B (zh) | 2006-05-18 | 2007-05-11 | 带透明电极的玻璃基板及其制造方法,以及利用该基板的等离子显示器的前基板 |
US12/270,874 US7776229B2 (en) | 2006-05-18 | 2008-11-14 | Glass substrate provided with transparent electrodes and process for its production |
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Cited By (2)
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FR2942221A1 (fr) * | 2009-02-18 | 2010-08-20 | Seppic Sa | Compositions de depolissage du verre contenant du sel de fer |
WO2010115558A1 (de) * | 2009-04-09 | 2010-10-14 | Interpane Entwicklungs- Und Beratungsgesellschaft Mbh | Verfahren und system zur herstellung eines beschichteten gegenstands mit tempern |
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WO2012020899A1 (ko) * | 2010-08-10 | 2012-02-16 | 연세대학교 산학협력단 | 반사 방지성 유리 및 그 제조 방법 |
CN103227232A (zh) * | 2012-01-30 | 2013-07-31 | 亚树科技股份有限公司 | 糙化透明导电基板的制造方法 |
US9272945B2 (en) | 2012-10-25 | 2016-03-01 | Corning Incorporated | Thermo-electric method for texturing of glass surfaces |
WO2014087945A1 (ja) * | 2012-12-07 | 2014-06-12 | 富士フイルム株式会社 | 導電膜の製造方法、プリント配線基板 |
US20170103249A1 (en) * | 2015-10-09 | 2017-04-13 | Corning Incorporated | Glass-based substrate with vias and process of forming the same |
US10410883B2 (en) | 2016-06-01 | 2019-09-10 | Corning Incorporated | Articles and methods of forming vias in substrates |
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US10134657B2 (en) | 2016-06-29 | 2018-11-20 | Corning Incorporated | Inorganic wafer having through-holes attached to semiconductor wafer |
US10580725B2 (en) | 2017-05-25 | 2020-03-03 | Corning Incorporated | Articles having vias with geometry attributes and methods for fabricating the same |
US11078112B2 (en) | 2017-05-25 | 2021-08-03 | Corning Incorporated | Silica-containing substrates with vias having an axially variable sidewall taper and methods for forming the same |
US11554984B2 (en) | 2018-02-22 | 2023-01-17 | Corning Incorporated | Alkali-free borosilicate glasses with low post-HF etch roughness |
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- 2007-05-11 WO PCT/JP2007/059781 patent/WO2007135874A1/ja active Application Filing
- 2007-05-11 CN CN2007800174590A patent/CN101443858B/zh not_active Expired - Fee Related
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Also Published As
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US7776229B2 (en) | 2010-08-17 |
CN101443858A (zh) | 2009-05-27 |
US20090098351A1 (en) | 2009-04-16 |
JP5115476B2 (ja) | 2013-01-09 |
KR101419068B1 (ko) | 2014-07-11 |
JPWO2007135874A1 (ja) | 2009-10-01 |
KR20090009193A (ko) | 2009-01-22 |
CN101443858B (zh) | 2012-03-28 |
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