WO2012132935A1 - 電子機器用カバーガラスの製造方法、電子機器用カバーガラス、及び電子機器に用いられるカバーガラス用ガラス基板、並びにタッチセンサモジュールの製造方法 - Google Patents

電子機器用カバーガラスの製造方法、電子機器用カバーガラス、及び電子機器に用いられるカバーガラス用ガラス基板、並びにタッチセンサモジュールの製造方法 Download PDF

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Publication number
WO2012132935A1
WO2012132935A1 PCT/JP2012/056704 JP2012056704W WO2012132935A1 WO 2012132935 A1 WO2012132935 A1 WO 2012132935A1 JP 2012056704 W JP2012056704 W JP 2012056704W WO 2012132935 A1 WO2012132935 A1 WO 2012132935A1
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WO
WIPO (PCT)
Prior art keywords
printing
glass substrate
protective film
cover glass
glass
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Application number
PCT/JP2012/056704
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English (en)
French (fr)
Japanese (ja)
Inventor
下川　貢一
Original Assignee
Hoya株式会社
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Publication date
Application filed by Hoya株式会社 filed Critical Hoya株式会社
Priority to CN201280016451.3A priority Critical patent/CN103619773B/zh
Publication of WO2012132935A1 publication Critical patent/WO2012132935A1/ja

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present invention includes a cover glass for a mobile device used for protecting a display screen of a mobile device such as a mobile phone or a PDA (Personal Digital Assistant), and a cover glass for a touch sensor that is a cover member for the sensor substrate of the touch sensor.
  • the present invention relates to a method for manufacturing a cover glass for electronic devices, a cover glass for electronic devices, a glass substrate for cover glass used in electronic devices, and a method for manufacturing a touch sensor module.
  • a cover glass made of such a glass material is generally manufactured by the following process.
  • the glass material formed into a sheet is cut into a predetermined size by machining (cutting) or etching, and a glass substrate for cover glass is produced.
  • necessary drilling or outer peripheral shape processing is performed on the glass substrate by machining or etching.
  • This chemical strengthening treatment is a treatment method in which sodium Na + in glass is exchanged with potassium K + having a large ionic radius to form a compressive stress layer on the glass surface.
  • the cover glass is required to have high strength because of impact and pressure.
  • desired printing is performed on the surface of the glass substrate subjected to the above chemical strengthening treatment. The cover glass thus completed is incorporated into a portable device.
  • the glass substrate for cover glass is subjected to a chemical strengthening treatment in order to improve its strength.
  • a chemical strengthening treatment By the way, one of the factors that hinder the strength of the cover glass is a scratch. If the surface or end face of the cover glass is scratched, it grows and causes damage to the cover glass even with a relatively weak impact.
  • the chemical strengthening treatment is performed on the glass substrate for the cover glass, and then the printing process is performed.
  • the cover glass printing method is generally screen printing.
  • the glass substrates are loaded one by one on an alignment jig attached to a screen printing machine, and the printing layers are sequentially applied.
  • the glass substrate is removed from the jig, and if it is thermosetting ink, it is heated at a temperature of about 60 to 100 ° C. To pre-dry printing layer A.
  • the glass substrate on which the printing layer A is printed is loaded into an alignment jig attached to the printing machine equipped with the screen of the printing layer B, the printing layer B is printed, and the glass substrate is again mounted on the jig.
  • the operation of pre-drying the printing layer B after removing from the printer is repeated.
  • scratches caused by repeated contact of the surface and end surface of the glass substrate with the jig many times as the operation of loading and removing the glass substrate from the jig is repeated. May occur.
  • the number of print layers has been increasing. As described above, the possibility of scratches increases as the number of times of printing increases.
  • Patent Document 1 instead of directly forming an ink image on a tempered glass plate by a method such as screen printing, a film or a character or pattern printed on one side of the tempered glass plate is attached.
  • a protective plate for a portable display device is disclosed in which a baking coating is applied and a film-like anti-scattering film is applied to the other surface. This anti-scattering film is for preventing the fragments from being scattered when the tempered glass plate is broken.
  • Patent Document 2 describes that a fluorine-based protective film is applied to the surface of a glass plate, and a dip method is described as an example of a film forming method for the fluorine-based protective film.
  • Patent Document 1 and Patent Document 2 do not describe that there is a possibility that scratches may occur on the surface or end surface of the chemically strengthened glass substrate in the printing process performed after the chemical strengthening process. In the prior art disclosed in the literature, it is impossible to prevent the glass substrate from being damaged in the printing process described above. Moreover, when a fluorine-type protective film is formed on the surface of a glass plate by the dip method as disclosed in Patent Document 2, it becomes difficult to directly form a printing layer by screen printing or the like.
  • the present invention has been made in order to solve such a conventional problem, and the object thereof is to enable direct printing on the surface of a glass substrate for a cover glass that has been chemically strengthened, and in addition to glass for printing.
  • a method of manufacturing a cover glass for electronic equipment capable of preventing the generation of scratches on the substrate, and the formation of a transparent conductive film on the surface of the glass substrate, and the generation of scratches on the glass substrate during film formation It is providing the manufacturing method of the touch sensor module which can prevent.
  • the present invention has the following configuration.
  • (Configuration 1) A method of manufacturing a cover glass used in an electronic device, the manufacturing method including a printing step of printing on a surface of a glass substrate for cover glass, and a step of forming a protective film on the glass substrate for cover glass; Before the printing step, a step of modifying the surface of the protective film corresponding to at least the region to be printed so as to enable the printing, and in the printing step, the modification treatment is performed.
  • the manufacturing method of the cover glass for an electronic device printing is performed on a region where the printing is performed among the remaining regions.
  • (Configuration 2) A method for producing a cover glass for an electronic device comprising a glass substrate, the production method comprising a printing step of printing on a surface of the glass substrate, wherein the protective film is formed on the entire outer surface of the glass substrate. Before the printing step on the substrate, a step of modifying the surface of the protective film corresponding to at least the region where the printing is performed so that the printing can be performed; and Of these, the method for producing a cover glass for electronic equipment includes the printing step of performing printing on a region to be printed.
  • (Configuration 3) A method of manufacturing a cover glass used in an electronic device, the manufacturing method including a printing step of printing on a surface of a glass substrate for cover glass, and a step of forming a protective film on the glass substrate for cover glass; Before the printing step, the step of removing the protective film corresponding to at least the region to be printed, and in the printing step, printing is performed on the region to be printed out of the region from which the protective film has been removed. It is a manufacturing method of the cover glass for electronic devices characterized by performing.
  • (Configuration 4) A method for producing a cover glass for an electronic device comprising a glass substrate, the production method comprising a printing step of printing on a surface of the glass substrate, wherein the protective film is formed on the entire outer surface of the glass substrate. Before the printing step, the substrate is subjected to a step of removing the protective film corresponding to at least the region to be printed, and the region to be printed is printed out of the region from which the protective film has been removed. It is a manufacturing method of the cover glass for electronic devices characterized by including a printing process.
  • the said protective film consists of a fluorine resin material or a silicon-type resin material, It is a manufacturing method of the cover glass for electronic devices of the structure 6 characterized by the above-mentioned.
  • (Configuration 13) 13 The method for manufacturing a cover glass for an electronic device according to any one of Structures 1 to 12, wherein the glass substrate for cover glass has a thickness of 0.3 mm to 1.5 mm.
  • (Configuration 14) A glass substrate for a cover glass used in an electronic device, which is protected on the surface of the glass substrate in order to prevent generation of scratches on the surface of the glass substrate in a printing process for forming a printed layer on the surface of the glass substrate.
  • region where the said printing layer of the said glass substrate surface is formed is a printable area
  • (Configuration 16) It is a cover glass for electronic devices in which a printed layer is formed on the surface of the glass substrate for cover glass according to Configuration 14 or 15.
  • a method for manufacturing a touch sensor module comprising a glass substrate for a cover glass and detecting a user operation, the manufacturing method including a film forming step of forming a transparent conductive film on the glass substrate, A step of modifying or removing the protective film so that the film formation can be performed on the glass substrate having a protective film formed on the entire outer surface of the glass substrate before the film formation step. And a film forming step of forming a film on the surface of the modified protective film or the glass substrate surface from which the protective film has been removed.
  • the printing step is performed before the film formation step, and further includes a printing step of printing on the surface of the glass substrate for cover glass, and the step of modifying or removing the protective film replaces the film formation step.
  • the printing process is performed on the surface of the modified protective film or the glass substrate surface from which the protective film is removed, and the film forming process is performed after the printing process.
  • the cover glass for electronic devices which can perform printing directly on the surface of the glass substrate for cover glass chemically strengthened, and can prevent the damage
  • a method for manufacturing a touch sensor module can form a transparent conductive film on the surface of the glass substrate, and can prevent the glass substrate from being damaged during the film formation. Can be provided.
  • the cover glass for portable devices as the cover glass for electronic devices made of the glass material according to the present invention is manufactured by a process as described below. First, a glass material formed into a sheet is cut into a predetermined size by machining or the like to produce a glass substrate for cover glass.
  • a sheet glass material (sheet glass) having a thickness of, for example, about 0.5 mm manufactured by the downdraw method or the float method is laminated (laminated) (for example, about several tens of sheets) and predetermined using a glass cutter. Cut into small pieces.
  • the sheet-like glass material may be processed one by one, but if the laminated ones are cut at once, the laminated pieces can be shaped at the same time in the next shape processing step, which is advantageous in production. It is.
  • the size of the small piece may be determined in consideration of the size of the product cover glass plus the margin necessary for the outer peripheral shape processing.
  • the thickness of the glass substrate for cover glass is preferably in the range of, for example, about 0.3 mm to 1.5 mm, more preferably from the viewpoint of meeting the recent market needs for thinner and lighter portable devices.
  • the range is about 0.5 mm to 0.7 mm.
  • the glass constituting the glass substrate for cover glass is preferably amorphous aluminosilicate glass.
  • a glass substrate made of such an aluminosilicate glass is excellent in strength after chemical strengthening.
  • Such aluminosilicate glass is mainly composed of 58 to 75% by weight of SiO 2 , 0 to 20% by weight of Al 2 O 3 , 0 to 10% by weight of Li 2 O and 4 to 20% by weight of Na 2 O.
  • An aluminosilicate glass contained as a component can be used.
  • an etching method can also be applied as a means other than the above-described machining. That is, a resist (photosensitive organic material) is applied to the surface of the sheet-like glass material, subjected to predetermined exposure and development, and a resist pattern having a cutting line pattern (there is no resist on the cutting line) Pattern). Then, the glass material on which such a resist pattern is formed is cut into small pieces of a predetermined size by wet etching using an etching solution that can dissolve the glass material (for example, an acidic solution containing hydrofluoric acid as a main component). The remaining resist pattern is peeled off and washed.
  • etching solution that can dissolve the glass material
  • FIG. 3 is a plan view showing an example of the shape of the glass substrate for cover glass.
  • the glass substrate 1 for cover glass has an outer shape 1a, a notch 1b, an ear hole 1c, and a key operation hole 1d.
  • Such drilling and outer peripheral shape processing may be machined by sandblasting or the like, or these drilling processing and outer peripheral shape processing may be collectively performed by etching.
  • etching is advantageous for complex shape processing. Note that the etching method is the same as the etching method in the above-described cutting process. Moreover, you may use together machining and an etching process according to a process shape.
  • the chemical strengthening treatment method for example, a low temperature type ion exchange method in which ion exchange is performed in a temperature range that does not exceed the glass transition temperature, for example, a temperature of 300 degrees Celsius or more and 400 degrees Celsius or less is preferable.
  • the chemical strengthening treatment is a process in which a molten chemical strengthening salt is brought into contact with a glass substrate, whereby an alkali metal element having a relatively large atomic radius in the chemical strengthening salt and a relatively small atomic radius in the glass substrate.
  • This is a treatment in which an alkali metal element is ion-exchanged, an alkali metal element having a large ion radius is permeated into the surface layer of the glass substrate, and compressive stress is generated on the surface of the glass substrate.
  • alkali metal nitric acid such as potassium nitrate and sodium nitrate can be preferably used.
  • a chemically strengthened glass substrate is improved in strength and excellent in impact resistance, and thus is suitable for a cover glass used for a portable device that requires impact and pressure and requires high strength.
  • the manufacturing method of the cover glass for portable devices as the cover glass for electronic devices of the present invention includes a printing step of printing on the surface of the glass substrate for cover glass, and a step of forming a protective film on the glass substrate for cover glass; Before the printing step, a step of modifying the surface of the protective film corresponding to at least the region to be printed so that the printing is possible, and in the printing step, the modifying treatment In the printed area, printing is performed on the area to be printed.
  • FIG. 1A to 1C are schematic cross-sectional views for explaining a first embodiment of a method for manufacturing a cover glass for portable equipment as a cover glass for electronic equipment according to the present invention.
  • the protective film 2 is formed in the whole surface of the glass substrate 1 for cover glasses.
  • the glass substrate 1 for cover glass in this case is a glass substrate subjected to the above-described chemical strengthening treatment.
  • the surface of the glass substrate 1 and the end surface of the protective film 2 are mounted on the jig of the printing machine and repeatedly removed from the jig. Is to prevent (or suppress) the generation of scratches on the glass substrate 1 due to contact with the glass substrate 1 several times.
  • a material containing a general organic polymer compound as the material of the protective film 2.
  • the material of the protective film 2 there are points to be considered when selecting the material of the protective film 2. That is, when a desired printing layer is formed on the glass substrate 1 having the protective film 2 formed on the entire surface, and the completed cover glass is incorporated into a display screen portion of a portable device, the surface side of the cover glass (the side opposite to the printing surface) ) Is exposed to the surface.
  • the display screen is directly touched with a finger and operated, and thus, dirt such as fingerprints is likely to adhere to the display screen.
  • the protective film 2 even if it is directly touched (pressed) with a finger, it prevents or suppresses dirt such as fingerprints from being adhered, or even if dirt such as fingerprints adheres is prevented. It is preferable to select a material having soiling properties. It is also important to have excellent transparency.
  • a material that prevents or suppresses the generation of scratches on the glass substrate 1 in the printing process has antifouling properties, and is excellent in transparency, for example, a fluorine resin material (for example, perfluorocarbon)
  • a material that lowers the surface energy such as a polyether compound or the like, or a silicon-based resin material (such as a silicone resin) is preferable.
  • the protective film 2 can be applied and formed by a dip method, for example.
  • the dipping method is performed by immersing the glass substrate 1 for cover glass in a coating solution containing, for example, the fluororesin or silicon resin as a main component in an appropriate solvent, and taking it out and drying it.
  • the protective film 2 having a uniform thickness can be formed on the entire surface of the glass substrate 1 for cover glass.
  • the coating thickness of the protective film 2 is not particularly limited, but is preferably in the range of 0.5 nm to 3000 nm, for example. If the film thickness is less than 0.5 nm, the protective film function in the printing process may not be sufficiently exhibited. On the other hand, when the film thickness exceeds 3000 nm, the transparency is lowered, so that the protective film request for the portable device is not met.
  • FIG. 1B At least the surface of the protective film 2 corresponding to the region to be printed is subjected to a modification process so that printing is possible.
  • What is indicated by reference numeral 2a in FIG. 1B is a modified layer formed on the surface layer of the protective film 2 by such modification treatment.
  • the surface of the protective film 2 is modified to enable printing.
  • the screen printing method is generally used as the cover glass printing method.
  • a modification process that reduces the contact angle with water on the surface of the protective film 2.
  • the modification treatment for reducing the contact angle with water on the surface of the protective film 2 include a method of exposing the surface of the protective film 2 to ultraviolet irradiation or oxygen plasma exposure.
  • conditions such as irradiation energy and irradiation amount (irradiation time) in the case of performing ultraviolet irradiation, and conditions such as plasma energy and exposure time in the case of oxygen plasma exposure, preferable conditions can be selected as appropriate. Note that it is possible to adjust the thickness in the depth direction of the modified layer 2a formed on the surface layer of the protective film 2 by these ultraviolet irradiation conditions or oxygen plasma exposure conditions.
  • the cover glass is usually incorporated with the printed layer side facing the inside of the portable device, the surface of the protective film on the surface to be incorporated in the portable device is modified. Further, in the present embodiment, it is necessary to modify the surface of the protective film 2 corresponding to at least the region to be printed so that printing is possible.
  • the present invention is not limited to this. It is possible to set a region wider than the region where printing is actually performed (that is, including a region other than the printing region) and to modify the surface of the protective film 2 corresponding to the region for the convenience of the quality processing means. There is no problem.
  • a printing process is performed. That is, a desired printing layer (ink layer) 3 is formed in a region to be printed out of the modified region.
  • the modified layer 2a is subjected to a modification process that reduces the contact angle of the surface with water so that printing can be performed. Desired printing can be performed by screen printing or the like.
  • the operation of loading and removing the glass substrate from the jig of the printing press is repeated according to the number of times of printing. In this embodiment, the jig of the printing press is used.
  • the protective film 2 is formed on the end surface and the back surface (surface opposite to the printing surface) of the glass substrate 1 in contact with the glass, the glass is formed by the back surface and end surface of the glass substrate 1 coming into contact with the jig many times.
  • substrate 1 can be prevented effectively (or suppressed).
  • the cover glass thus completed is incorporated into a portable device.
  • the method for manufacturing a cover glass for portable devices of the present embodiment even if a protective film is formed on the surface of the glass substrate for chemically strengthened cover glass, the protective film on the printed surface side It is possible to perform printing directly by modifying the surface, and the protective film can prevent (or suppress) the generation of scratches on the glass substrate during the printing process.
  • a transparent conductive layer is formed on the main surface side of the glass substrate 1 that is incorporated toward the inside of the portable device (that is, the modified protective film surface side).
  • a touch sensor module for detecting the operation of the user is used.
  • the present invention also provides a method for manufacturing such a touch sensor module. That is, this invention is a manufacturing method of the touch sensor module for providing a glass substrate for cover glasses, and detecting a user's operation, Comprising: This manufacturing method forms a transparent conductive film with respect to the said glass substrate.
  • the protective film is formed before the film forming process and enables the film formation on the glass substrate including a film forming process and having a protective film formed on the entire outer surface of the glass substrate.
  • a method of manufacturing a touch sensor module comprising: a step of modifying or removing; and a film forming step of forming a film on the surface of the modified protective film or the glass substrate surface from which the protective film has been removed. It is.
  • the present invention may further include a printing step that is performed before the film forming step, and that prints on a surface of the glass substrate for cover glass.
  • the removing step is performed before the printing step instead of the film forming step, and the printing step performs printing on the modified protective film surface or the glass substrate surface from which the protective film has been removed,
  • the film forming step includes forming a transparent conductive film on the modified protective film surface or the glass substrate surface from which the protective film is removed after the printing step. is there.
  • the protective film 2 is formed on the end surface and the back surface of the glass substrate 1 (the surface opposite to the printing surface). It is possible to effectively prevent (or suppress) the generation of scratches on the glass substrate 1 due to the back surface and the end surface coming into contact with the jig of the transparent conductive layer film forming means (film forming apparatus or the like).
  • the transparent conductive layer is formed with a predetermined thickness.
  • the “predetermined thickness” of the transparent conductive layer is, for example, 100 nm or less when formed by a sputtering method, and includes a transparent resin serving as a binder when formed by a printing method. 1000 nm or less.
  • a transparent conductive layer for example, an ITO (Indium Tin Oxide) film is formed using a sputtering method or the like, and laser patterning using a photolithography technique, a YAG (Yttrium Aluminum Garnet) fundamental wave, a CO 2 laser, or the like. It is formed by processing the transparent conductive layer into a desired pattern shape using a technique.
  • the connection part metal wiring is formed by forming a metal conductive material on the surface of the printing region of the glass substrate by using a sputtering method or the like, and using a photolithography technique or the like to form the metal film. Is formed into a desired pattern shape.
  • an insulating layer is formed between the surface of the modified protective film and the transparent conductive layer, and between the surface of the modified protective film and the connecting portion (metal wiring), if necessary. Is done.
  • This insulating layer is preferably formed using an insulating material having transparency, for example, an inorganic material such as SiO 2 .
  • the insulating layer is preferably formed to a thickness of about 50 to 1000 mm using, for example, a sputtering method.
  • (Second Embodiment) 2nd Embodiment of the manufacturing method of the cover glass for portable devices as a cover glass for electronic devices which concerns on this invention includes the printing process which prints on the surface of the glass substrate for cover glasses, The said glass substrate for cover glasses Forming a protective film on the substrate, and removing the protective film corresponding to at least the region to be printed before the printing step, and in the printing step, the region from which the protective film has been removed Of these, printing is performed on the area to be printed.
  • FIGS. 2A to 2C are schematic cross-sectional views for explaining a second embodiment of a method for manufacturing a cover glass for a portable device as a cover glass for an electronic device according to the present invention.
  • the protective film 2 is formed in the whole surface of the glass substrate 1 for cover glasses.
  • the glass substrate 1 for cover glass in this case is a glass substrate that has been subjected to the above-described chemical strengthening treatment.
  • steps from preparation of a glass substrate from a sheet-like glass material, external processing of the glass substrate, and chemical strengthening of the glass substrate Since this is the same as that of the first embodiment described above, redundant description is omitted here.
  • the material, formation method, and the like of the protective film 2 are the same as those in the first embodiment.
  • FIG. 2B shows a case where the entire protective film 2 on the printing surface side is removed as an example.
  • the method for removing the protective film 2 varies depending on the material, but is not particularly limited in the present invention and is arbitrary.
  • a desired printing layer (ink layer) 3 is formed in a region where printing is performed in the region where the protective film 2 is removed.
  • desired printing can be performed directly on the surface of the glass substrate 1 by screen printing or the like.
  • the operation of loading the glass substrate into the jig of the printing machine and removing it from the jig is repeated according to the number of times of printing.
  • the protective film 2 is formed on at least the end surface and the back surface (surface opposite to the printing surface) of the glass substrate 1 that contacts the jig of the printing press, the back surface and the end surface of the glass substrate 1 are the jig. It is possible to effectively prevent (or suppress) the generation of scratches on the glass substrate 1 due to contact with the glass substrate 1 several times.
  • the protective film on at least the printing area on the printing surface side is removed so that there is no protective film.
  • the printing surface only comes into contact with, for example, a screen printing plate, and the jig of the printing machine. Since there is no direct contact with the surface, there is a very low possibility that scratches that affect the strength of the glass substrate on the printed surface side will occur.
  • the cover glass is usually incorporated with the printed layer side facing the inside of the portable device, the protective film on the surface to be incorporated in the portable device is removed.
  • the protective film on the surface to be incorporated in the portable device is removed.
  • at least the protective film 2 corresponding to the region to be printed needs to be removed.
  • the present invention is not limited to this.
  • printing is actually performed. In some cases, it is necessary to remove the protective film 2 corresponding to an area wider than the area (that is, including an area other than the printing area).
  • the cover glass thus completed is incorporated into a portable device.
  • the method for manufacturing a cover glass for a portable device of the present embodiment even if a protective film is formed on the surface of the glass substrate for chemically strengthened cover glass, the protective film in the printing region is removed.
  • printing can be performed directly, and the protective film formed on the glass substrate can prevent (or suppress) the occurrence of scratches on the glass substrate during the printing process.
  • the transparent conductive layer is formed on the region side from which the protective film has been removed in addition to the printed layer to form a touch sensor module
  • the end surface and the back surface of the glass substrate 1 (the above-mentioned Since the protective film 2 is formed on the surface opposite to the printing surface, the back surface and the end surface of the glass substrate 1 come into contact with the jig of the transparent conductive layer film forming means (film forming apparatus, etc.). Generation of scratches on the glass substrate 1 can be effectively prevented (or suppressed).
  • Example 1 This implementation is performed through the following (1) glass substrate processing step, (2) shape processing step, (3) chemical strengthening step, (4) protective film forming step, (5) reforming treatment step, and (6) printing step.
  • An example cover glass was made.
  • a glass substrate for cover glass was produced by cutting out a predetermined size from a 0.5 mm thick plate glass made of an aluminosilicate gate glass produced by a downdraw method or a float method.
  • a chemical containing SiO 2 : 58 to 75 wt%, Al 2 O 3 : 5 to 23 wt%, Li 2 O: 3 to 10 wt%, Na 2 O: 4 to 13 wt% Tempered glass was used.
  • the protective film corresponding to the region to be printed on the printing surface side was irradiated with ultraviolet rays.
  • Ultraviolet irradiation was performed using a high-pressure mercury lamp (200 W, 185 nm wavelength component 30%), and the irradiation time was 15 seconds.
  • the contact angle with water on the surface of the protective film before the ultraviolet irradiation was 120 degrees
  • the contact angle after the ultraviolet irradiation decreased to 10 degrees or less. Note that after a while after the ultraviolet irradiation, the contact angle was 20 degrees, and the numerical value slightly increased. Therefore, when ultraviolet irradiation is performed as the modification treatment, it is considered desirable to perform the next printing process before a long time has elapsed after irradiation.
  • Printing process The printing process was implemented with respect to the glass substrate which performed the modification
  • the modification process is performed to reduce the contact angle of the protective film surface with water so that printing can be performed by irradiating the surface of the protective film corresponding to the printing area on the printing surface side with the ultraviolet rays. Therefore, desired printing could be performed on the surface of the protective film (modified layer). Further, the print quality (according to the visual evaluation of the skilled worker) was a level at which there was no problem as a product. Thus, the cover glass of this example was completed.
  • Example 2 A cover glass in the same manner as in Example 1 except that, in (5) the modification treatment step of Example 1, the protective film corresponding to the region to be printed on the printing surface side was subjected to atmospheric pressure plasma exposure treatment. Manufactured. The atmospheric pressure plasma exposure treatment was performed at RF output: 3.0 kW, N2 gas flow rate: 50 NL / min, CDA: 250 NmL / min, treatment time: 1 minute. The contact angle with water on the surface of the protective film before the oxygen plasma exposure was 130 degrees, but the contact angle after the oxygen plasma exposure (immediately after) decreased to 10 degrees or less.
  • cover glass of this example obtained in this way, printing with good print quality could be performed on the protective film surface (modified layer).
  • the protective film of the cover glass of this example was removed, and when the surface and end surface of the glass substrate were inspected in detail using an optical microscope, the occurrence of scratches on the glass substrate was detected. There wasn't. That is, also in the cover glass of the present embodiment, it is possible to effectively prevent generation of scratches on the glass substrate due to repeated contact with the jig in the printing process.
  • Example 3 Instead of the (5) reforming process in Example 1, the protective film corresponding to the area to be printed on the printing surface side is removed, and in the subsequent (6) printing process, printing is performed on the area from which the protective film has been removed. A layer was formed. Except for this, a cover glass was produced in the same manner as in Example 1.
  • cover glass of this example obtained in this way, it was possible to print with good print quality in the area where the protective film was removed. Moreover, when the remaining protective film of the cover glass of a present Example was removed and the surface and end surface of a glass substrate were inspected in detail using the optical microscope similarly to Example 1, generation
  • Example 4 In the protective film formation (antifouling coating) step of Example 1, a coating liquid (liquid temperature: 25 ° C.) prepared by adjusting Shin-Etsu Chemical Co., Ltd. (trade name) KY100 series to an appropriate concentration with a solvent as a fluororesin. ) was applied to the entire surface of the glass substrate after the chemical strengthening by a dipping method, and dried with hot air at 100 ° C. to form a protective film having a coating thickness of 10 nm. A cover glass was produced in the same manner as in Example 1 except for this. In addition, the contact angle with respect to the water on the surface of the protective film before and after the modification of the protective film by the ultraviolet irradiation was the same as that in Example 1.
  • cover glass of this example obtained in this way, printing with good print quality could be performed on the protective film surface (modified layer).
  • the protective film of the cover glass of this example was removed, and when the surface and end surface of the glass substrate were inspected in detail using an optical microscope, the occurrence of scratches on the glass substrate was detected. There wasn't. That is, also in the cover glass of the present embodiment, it is possible to effectively prevent generation of scratches on the glass substrate due to repeated contact with the jig in the printing process.
  • Example 1 The same printing process as in Example 1 was performed on the glass substrate that had been subjected to the chemical strengthening process in the same manner as in Example 1, without forming the protective film.
  • cover glass of this comparative example thus obtained, printing with good print quality could be performed on the surface of the chemically strengthened glass substrate.
  • the surface and end surface of the glass substrate were inspected in detail using an optical microscope, the occurrence of scratches on the glass substrate was detected, and in particular, there were many on the end surface and back surface of the glass substrate that were in direct contact with the jig of the printing press. A wound was found.
  • the cover glass of this comparative example since the protective film is not formed before the printing process, it is possible to prevent the glass substrate from being damaged due to repeated contact with the jig in the printing process. Can not.
  • Example 2 A cover glass was produced in the same manner as in Example 1 except that (5) the modification treatment step of Example 1 was omitted.
  • the cover glass of this comparative example obtained in this way was not subjected to a modification treatment that would allow printing on the protective film in the printing area, so it could be printed temporarily, but it was required for the product. A certain level of print quality could not be obtained.
  • the protective film of the cover glass of this comparative example was removed and the surface and end surface of the glass substrate were inspected in detail using the optical microscope, generation

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
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  • Human Computer Interaction (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Printing Methods (AREA)
PCT/JP2012/056704 2011-03-31 2012-03-15 電子機器用カバーガラスの製造方法、電子機器用カバーガラス、及び電子機器に用いられるカバーガラス用ガラス基板、並びにタッチセンサモジュールの製造方法 WO2012132935A1 (ja)

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WO2013089178A1 (ja) * 2011-12-13 2013-06-20 Hoya株式会社 電子機器用カバーガラス及びその製造方法、並びにタッチセンサモジュールの製造方法
CN108268820A (zh) * 2016-12-30 2018-07-10 南昌欧菲光学技术有限公司 电子装置、玻璃盖板及其制作方法
US20200369562A1 (en) * 2017-11-30 2020-11-26 Saint-Gobain Glass France Method for producing a printed, coated panel
US11524916B2 (en) 2017-11-30 2022-12-13 Saint-Gobain Glass France Method for producing a printed, coated panel

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CN103434289B (zh) * 2013-08-27 2016-07-27 江西合力泰科技有限公司 一种防止玻璃盖板脏污的印刷工艺
CN113716879B (zh) * 2015-08-10 2022-12-30 Ａｇｃ株式会社 带防污层的玻璃板
JP7142090B2 (ja) * 2018-06-04 2022-09-26 株式会社カネカ ガラス積層体、その製造方法、及びそれを用いた表示装置の前面板
CN108863103A (zh) * 2018-08-31 2018-11-23 嘉善银升玻璃有限公司 一种防油污玻璃的加工方法

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JP2001192237A (ja) * 1999-10-29 2001-07-17 Nippon Electric Glass Co Ltd ガラス物品とその製造方法及び物品表面の清浄化方法
WO2009099615A1 (en) * 2008-02-05 2009-08-13 Corning Incorporated Damage resistant glass article for use as a cover plate in electronic devices
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WO2013089178A1 (ja) * 2011-12-13 2013-06-20 Hoya株式会社 電子機器用カバーガラス及びその製造方法、並びにタッチセンサモジュールの製造方法
JP5270810B1 (ja) * 2011-12-13 2013-08-21 Ｈｏｙａ株式会社 電子機器用カバーガラス及びその製造方法、並びにタッチセンサモジュールの製造方法
CN103974919A (zh) * 2011-12-13 2014-08-06 Hoya株式会社 电子设备用盖板玻璃及其制造方法、以及触摸传感器模块的制造方法
CN103974919B (zh) * 2011-12-13 2016-07-06 Hoya株式会社 电子设备用盖板玻璃及其制造方法、以及触摸传感器模块的制造方法
CN108268820A (zh) * 2016-12-30 2018-07-10 南昌欧菲光学技术有限公司 电子装置、玻璃盖板及其制作方法
US20200369562A1 (en) * 2017-11-30 2020-11-26 Saint-Gobain Glass France Method for producing a printed, coated panel
US11524916B2 (en) 2017-11-30 2022-12-13 Saint-Gobain Glass France Method for producing a printed, coated panel
US11548812B2 (en) * 2017-11-30 2023-01-10 Saint-Gobain Glass France Method for producing a printed, coated panel

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TWI524168B (zh) 2016-03-01
JP5454969B2 (ja) 2014-03-26

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