With Severing Or Preforating Patents (Class 65/112)
  • Patent number: 10838220
    Abstract: Polarizing optical devices described herein, and polarizing optical devices resulting from methods described herein, can be small and can have high heat tolerance. Wires of wire grid polarizers can be attached directly to prisms of the polarizing optical devices, allowing for small size. Multiple polarizing optical devices can be attached by adhesive-free bonding techniques, allowing high heat tolerance.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: November 17, 2020
    Assignee: Moxtek, Inc.
    Inventors: Liang Gao, Shaun Ogden
  • Patent number: 10724292
    Abstract: A laminated includes two bent glass substrates, a polymer interlayer between the glass substrates, and a notch or orifice cut in an entire thickness of the glazing. The glazing includes a border of compressive edge stresses obtained by general controlled cooling of the substrates in a paired state so that compressive stresses are generated at the border, and a local compression zone, different from the border, and obtained by local controlled cooling of a local area of a main surface of the glazing so that compressive stresses are generated in theid local compression zone. The notch or orifice is located in the local compression zone and made in the substrates in a paired state after forming the local compression zone so that cut contours of the substrates in the notch or orifice have a perfect superposition. The compressive edge stresses of the cut contours are greater than 4 MPa.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: July 28, 2020
    Assignee: SAINT-GOBAIN GLASS FRANCE
    Inventors: Stéphane Berard, Alexandre Hennion, Philippe Frebourg
  • Patent number: 10576651
    Abstract: Provided are a method of full body cutting a brittle material without via the bend-breaking step, an apparatus of cutting a brittle material, a method of manufacturing a brittle material, and a cut brittle material. A method of cutting a brittle material, the method comprising: a conveyance cutting step of converging and irradiating an infrared ray to the brittle material linearly along a line using an infrared line heater while moving the infrared line heater relative to the brittle material in a direction along the line, thereby cutting the brittle material along the line.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: March 3, 2020
    Assignee: Central Glass Co., Ltd.
    Inventors: Hiroyuki Tamon, Hideaki Oota, Naoya Hayakawa
  • Patent number: 10450216
    Abstract: A glass sheet processing method is provided for irradiating a laser beam on a glass sheet and forming a cleavage in the glass sheet with thermal stress. If each of an irradiation area of the laser beam on the surface and an irradiation area of the laser beam on the back face of the glass sheet includes a peak position of a power density of the laser beam, each irradiation area has an asymmetrical power density distribution that is asymmetrical with respect to a reference line that passes through the peak position and is parallel to a moving direction of the peak position. If each irradiation area has no peak position, each irradiation area has an asymmetrical shape that is asymmetrical with respect to a reference line that passes through a centroid position of the irradiation area and is parallel to a moving direction of the centroid position.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: October 22, 2019
    Assignee: AGC Inc.
    Inventors: Isao Saito, Takahiro Nagata
  • Patent number: 9362439
    Abstract: A film of material may be formed by providing a semiconductor substrate having a surface region and a cleave region located at a predetermined depth beneath the surface region. During a process of cleaving the film from the substrate, shear in the cleave region is carefully controlled. According to certain embodiments, an in-plane shear component (KII) is maintained near zero, sandwiched between a tensile region and a compressive region. In one embodiment, cleaving can be accomplished using a plate positioned over the substrate surface. The plate serves to constrain movement of the film during cleaving, and together with a localized thermal treatment reduces shear developed during the cleaving process. According to other embodiments, the KII component is purposefully maintained at a high level and serves to guide and drive fracture propagation through the cleave sequence.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: June 7, 2016
    Assignee: SILICON GENESIS CORPORATION
    Inventor: Francois J. Henley
  • Patent number: 9120179
    Abstract: Methods related to efficient processing of sapphire are discussed which are expected to both speed manufacture of corundum for applications and make the use of conundrum cost effective. In particular, one embodiment may take the form of a method of cutting a hard transparent material having a polished surface. The method includes roughening the polished surface, directing a laser beam at the hard transparent material to melt the material and removing the melted hard material.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 1, 2015
    Assignee: Apple Inc.
    Inventors: Anthony J. Richter, Dale N. Memering, Vincent Yan
  • Patent number: 9073778
    Abstract: Glass layers 3 are molten by irradiation with laser light L, so as to generate a temperature difference in a part along regions to be fused R in each of glass substrates 40, 50 so that main faces 40a, 50a on the glass layer 3 side have a temperature higher than that on main faces 40b, 50b on the opposite side of the glass layers 3. Thereafter, the molten glass layers 3 solidify, and cooling generates a stress in the glass substrates 40, 50. Here, since initial fractures 8 are formed in the glass substrate 50 so as to overlap the glass layers 3, fractures grow in the thickness direction of the glass substrates 40, 50 through the glass layers 3 from the initial fractures 8 acting as a start point.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: July 7, 2015
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventor: Satoshi Matsumoto
  • Publication number: 20150143849
    Abstract: A method of cutting a sheet material includes mounting the sheet material on a support and forming a porous barrier between the sheet material and the support by interposing at least one sheet of porous material between the sheet material and the support. The method includes focusing a laser beam at a target point relative to the sheet material on the support. A relative motion is effected between the focused laser beam and the sheet material such that the focused laser beam moves along a predetermined path on the sheet material to cut the sheet material along the predetermined path while the porous barrier shields the support from damage by the focused baser beam.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 28, 2015
    Inventors: Kun Hung Tu, Craig Steven Weber
  • Publication number: 20150132525
    Abstract: The present invention provides a method for manufacturing a small-sized physically-strengthened glass sheet having excellent design properties, a structure using the small-sized physically-strengthened glass sheet, and a method for manufacturing the structure. In the cutting step in the method for manufacturing a physically-strengthened glass sheet of the present invention, the intermediate layer 17 is locally heated at a temperature not higher than the annealing point thereof with a laser beam 20 to thereby locally generate a tensile stress smaller than the internal residual tensile stress CT or a compressive stress in the intermediate layer 17 to control the propagation speed of the crack 30 due to the internal residual tensile stress.
    Type: Application
    Filed: January 12, 2015
    Publication date: May 14, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yasumasa KATO, Takahiro Nagata, Isao Saito, Akio Koike, Kenji Kitaoka, June Sasai
  • Publication number: 20150121962
    Abstract: A laser material processing system which includes a pulsed fiber laser source having a continuous wavelength bandwidth of larger than 100 nm and pulse width of from 100 femtosecond to 1 microsecond, a broad band laser emitted from one core of an optical fiber, where the broad band laser is applied to a subject material to produce removal of the subject material and/or color change of the subject material.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 7, 2015
    Inventors: Shibin Jiang, Jihong Geng, Qing Wang
  • Patent number: 9021837
    Abstract: A method of cleaving and separating a glass sheet includes a cleaving step of cleaving a glass sheet along preset cleaving lines by a laser cleaving method, and a separation step of separating adjacent pieces of the cleaved glass sheet from each other. The cleaving step is performed under a state in which the glass sheet is placed on support members provided respectively in segment regions, which are segmented by the preset cleaving lines. The separation step is performed by separating the support members from each other in adjacent segment regions.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: May 5, 2015
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Yasuo Teranishi, Yasuhiro Matsumoto, Michiharu Eta, Takahide Fujii, Naotoshi Inayama
  • Publication number: 20150118522
    Abstract: A non-ablative method and apparatus for making an economical glass hard disk (platter) for a computer hard disk drive (HDD) using a material machining technique involving filamentation by burst ultrafast laser pulses. Two related methods disclosed, differing only in whether the glass substrate the HDD platter is to be cut from has been coated with all the necessary material layers to function as a magnetic media in a computer's hard drive. Platter blanks are precisely cut using filamentation by burst ultrafast laser pulses such that the blank's edges need not be ground, the platter's geometric circularity need not be corrected and there is no need for further surface polishing. Thus the platters can be cut from raw glass or coated glass. As a result, this method reduces the product contamination, speeds up production, and realizes great reductions in the quantity of waste materials and lower production costs.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 30, 2015
    Applicant: ROFIN-SINAR TECHNOLOGIES INC.
    Inventor: S. ABBAS HOSSEINI
  • Publication number: 20150110991
    Abstract: Provided is a laminate (1) obtained by integrally laminating glass sheets (4) on both surfaces of a resin sheet (2). The glass sheets (4) have a thickness of 300 ?m or less and end surfaces (4a) of the glass sheets (4) are chamfered.
    Type: Application
    Filed: May 14, 2012
    Publication date: April 23, 2015
    Inventors: Yoshiharu Miwa, Yoshinori Hasegawa, Takayuki Noda, Hiroki Mori, Michiharu Eta
  • Patent number: 9010154
    Abstract: Provided is a method of cleaving and separating a glass sheet (G), the method comprising: a cleaving step of cleaving the glass sheet (G) along preset cleaving lines (X, Y) by a laser cleaving method; and a separation step of separating adjacent pieces of the cleaved glass sheet (G) from each other, wherein the cleaving step is performed under a state in which the glass sheet (G) is placed on a sheet (S) having stretchability, and the separation step is performed by stretching the sheet (S).
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: April 21, 2015
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Yasuo Teranishi, Yasuhiro Matsumoto, Michiharu Eta, Takahide Fujii, Naotoshi Inayama
  • Patent number: 9010151
    Abstract: A glass sheet cutting device fuses and divides a glass substrate using a preset cutting line as a boundary while supplying an assist gas and a laser beam from above the glass substrate along the preset cutting line of the glass substrate. The glass sheet cutting device includes a first laser irradiator for radiating a fusing laser beam and a second laser irradiator for radiating an annealing laser beam. Through a fusing gap formed between fused end surfaces by fusing, the second laser irradiator radiates the annealing laser beam obliquely from above onto the fused end surface to be annealed.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 21, 2015
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Takahide Fujii, Setsuo Uchida, Naotoshi Inayama, Takayuki Noda, Sho Itoh, Michiharu Eta
  • Publication number: 20150089977
    Abstract: Methods of forming scribe vents in a strengthened glass substrate having a compressive surface layer and an inner tension layer are provided. In one embodiment, a first and second defect is formed to partially expose the inner tension layer. A first scribe vent may be generated in a first scribing direction by translating a laser beam and a cooling jet on a surface of the strengthened glass substrate at a first scribing speed. A second scribe vent intersecting the first scribe vent may be generated in a second scribing direction by translating the laser beam and the cooling jet on the surface of the strengthened glass substrate at a second scribing speed that is greater than the first scribing speed. The defects may be perpendicular to the scribing directions. In another embodiment, the first scribe vent may be fused at an intersection location prior to generating the second scribe vent.
    Type: Application
    Filed: December 11, 2014
    Publication date: April 2, 2015
    Applicant: CORNING INCORPORATED
    Inventor: Xinghua Li
  • Publication number: 20150089978
    Abstract: A method for cutting chemically strengthened glass is provided. The chemically strengthened glass includes a first stress layer, a second stress layer, and a tension layer sandwich between the first stress layer and the second stress layer. The method includes: using a green pulsed laser to cut the first stress layer, wherein the green pulsed laser includes a first green pulsed laser having femtosecond level and a second green pulsed laser having nanosecond level; using a ultraviolet pulsed laser to cut the tension layer, wherein the ultraviolet pulsed laser includes a first ultraviolet pulsed laser having femtosecond level and a second ultraviolet pulsed laser having nanosecond level; and using the green pulse layer to cut the second stress layer.
    Type: Application
    Filed: December 24, 2013
    Publication date: April 2, 2015
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: FENG-YUEN DAI, HUNG-LIEN YEH, CHUNG-PEI WANG
  • Publication number: 20150075221
    Abstract: A method for cutting a strengthened glass sheet according to a first embodiment of the present invention includes: a step of collecting and scanning laser light in an intermediate layer, thereby forming a first reformed region along a first cutting-scheduled line; and a step of applying an external force to propagate a crack from the first reformed region as a start point in a thickness direction of the strengthened glass sheet, thereby dividing the strengthened glass sheet. In the step of forming the first reformed region, a width d1 (mm) of the first reformed region in the thickness direction is set to d1<2×103×Kc2/{?×(CT)2} based on a fracture toughness Kc (MPa·?m) of the strengthened glass sheet and the tensile stress CT (MPa) remaining in the intermediate layer.
    Type: Application
    Filed: November 26, 2014
    Publication date: March 19, 2015
    Applicants: HAMAMATSU PHOTONICS K.K., Asahi Glass Company, Limited
    Inventors: Daisuke KAWAGUCHI, Ikuo NAGASAWA
  • Publication number: 20150075222
    Abstract: When dividing glass using laser radiation into blanks (5) made of glass, a bundled laser beam (1) is directed onto the glass to be divided, and while forming at least two blanks (5), the glass is divided with sides (15) lying in the area of the cut. After the glass is divided, a laser beam (1) is directed onto at least one edge (16) of a side (15) of the formed blank (5) in order to separate glass from the edge (16) while forming a bevel (17) that lies on the side (15). For forming the bevel (17), at least one laser source (6) and a reflector (19) assigned to the latter are moved along the side (15) so that the laser beam (1)—which with the plane of the blank (5) encompasses an acute angle—is effective for forming the bevel (17).
    Type: Application
    Filed: July 17, 2013
    Publication date: March 19, 2015
    Applicant: LISEC AUSTRIA GMBH
    Inventor: Leopold Mader
  • Publication number: 20150064479
    Abstract: Certain example embodiments of this invention relate to heat treatable painted glass substrates that have less than 11 wt. % (more preferably 5-10 wt. %, and still more preferably 5-9 wt. %) organic content in an as-deposited state, and/or methods of making the same. The paint preferably is curable at a temperature less than 300 degrees C. over a relatively short amount of time (e.g., less than 10-15 minutes), and the cured coated article may be stored for lengthy periods of time before being further processed. In certain example embodiments, the coated article undergoes a significant color change upon heat treatment.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Inventors: Yaqiang MING, Suresh DEVISETTI
  • Publication number: 20150059411
    Abstract: A method of separating a thin glass substrate from a carrier plate to which edge portions of the glass substrate are bonded, including irradiating a surface of the glass substrate with a pulsed laser beam, the laser beam moving along a plurality of parallel scan paths within a raster envelope, producing relative motion between the raster envelope and the glass substrate so that the raster envelope is moved along an irradiation path on the unbonded central portion. The irradiating produces ablation of the glass substrate along the irradiation path that forms a channel having a width W1 at the first surface greater than a width W2 at the second surface and extending through the thickness of the glass substrate, thus separating a thin glass sheet from the glass substrate-carrier plate assembly.
    Type: Application
    Filed: August 22, 2014
    Publication date: March 5, 2015
    Inventors: Geunsik Lim, Robert Stephen Wagner, James Joseph Watkins
  • Patent number: 8950217
    Abstract: A method of cutting an object to be processed comprises the steps of irradiating an object to be processed with a laser light which is an elliptically-polarized light having an ellipticity other than 1 such that a direction of polarization of the laser light intersects a line to cut the object and a thickness direction of the object, while locating a converging point of the laser light within the object, so as to form a modified region within the object along the line and generate a fracture from the modified region in the thickness direction of the object, and causing the fracture to reach front and rear faces of the object so as to cut the object along the line.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: February 10, 2015
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Hiroyuki Iwaki, Takafumi Ogiwara, Takeshi Sakamoto, Masaharu Hoshikawa, Kazuhiro Atsumi, Daisuke Kawaguchi, Takafumi Tsunematsu
  • Patent number: 8943855
    Abstract: A method of cutting an article (172) from a chemically strengthened glass substrate (110) includes generating a pulsed laser beam (108) from a laser source (106). The pulsed laser beam (108) may have a pulse duration of less than about 1000 fs and an output wavelength such that the chemically strengthened glass substrate (110) is substantially transparent to the pulsed laser beam (108). The pulsed laser beam (108) may be focused to form a beam waist (109) that is positioned in the same horizontal plane as an inner tensile region (124) of the chemically strengthened glass substrate (110). The beam waist (109) may be translated in a first pass along a cut line (116), wherein the beam waist (109) traverses an edge (111) of the chemically strengthened glass substrate. The beam waist (113) may then be translated in a second pass along the cut line (116) such that a crack (119) propagates from the edge (113) along the cut line (116) ahead of the translated beam waist (109) during the second pass.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: February 3, 2015
    Assignee: Corning Incorporated
    Inventors: Sinue Gomez, Lisa Anne Moore, Sergio Tsuda
  • Publication number: 20150013391
    Abstract: The present invention relates to a method for processing an edge of a glass plate, and more specifically, to a method for processing an edge of a large-sized glass plate used for liquid crystal TVs and the like by means of heat treatment, and an apparatus therefor. The method for processing an edge of a glass plate according to the present invention is characterized by cutting off an edge of a cooled glass plate off while contacting and moving a heated member along the edge of the cooled glass plate.
    Type: Application
    Filed: January 8, 2013
    Publication date: January 15, 2015
    Applicant: LAMINEX CO., LTD.
    Inventor: Pyoeon Kim
  • Publication number: 20140366580
    Abstract: A method for cutting a tempered glass including the steps of strengthening a glass substrate to form, from a surface to the inside of the glass substrate, at least one compression stress layer and a tensile stress layer corresponding to the compression stress layer; removing a part of the glass substrate, wherein the compression stress layer is formed in the part of the glass substrate and a predetermined cutting path passes through the part of the glass substrate; and cutting the glass substrate along the predetermined cutting path.
    Type: Application
    Filed: September 3, 2014
    Publication date: December 18, 2014
    Inventors: JENG-JYE HUNG, YI-TE LEE, HEN-TA KANG, CHIH-YUAN WANG
  • Publication number: 20140363624
    Abstract: An apparatus, method, and process that includes a substantially transparent substrate having a first surface, a second surface, and an edge extending around at least a portion of a perimeter of the substantially transparent substrate, wherein the edge is a laser induced channel edge having enhanced edge characteristics.
    Type: Application
    Filed: August 21, 2014
    Publication date: December 11, 2014
    Inventors: Donald L. Bareman, William L. Tonar, Niels A. Olesen, Thomas J. Scott, David J. Cammenga, Henry A. Luten, George A. Neuman
  • Publication number: 20140363626
    Abstract: A method of manufacturing a glass substrate having a through hole, includes preparing a glass substrate having an average coefficient of thermal expansion in a range of 55×0?7/K to 120×10?7/K at 50° C. to 300° C., and a thickness of 0.2 mm or greater and 1 mm or less, and forming the through hole in the glass substrate using a laser-guided discharge technique.
    Type: Application
    Filed: August 21, 2014
    Publication date: December 11, 2014
    Inventors: Shintaro TAKAHASHI, Leander Dittmann, Adrien Chaize
  • Publication number: 20140352358
    Abstract: A method is disclosed for scribing a contained crack or vent in a chemically strengthened glass sheet. The glass has shallow surface regions under compressive stress, bounding a central region under tensile stress. The vent is formed by rapidly bulk-heating the glass, using radiation from a carbon monoxide laser, to a depth just below a surface compressive region and extending marginally into the tensile stress region then rapidly cooling the heated region with a water mist spray. The glass sheet can be subsequently divided along the vent by application of mechanical or thermal stress.
    Type: Application
    Filed: June 4, 2013
    Publication date: December 4, 2014
    Applicant: COHERENT, INC.
    Inventors: John F. WASHKO, JR., Xinghua LI, Walter R. BOSENBERG
  • Publication number: 20140340730
    Abstract: Methods for cutting strengthened glass are disclosed. The methods can include using a laser. The strengthened glass can include chemically strengthened, heat strengthened, and heat tempered glass. Strengthened glass with edges showing indicia of a laser cutting process are also disclosed. The strengthened glass can include an electrochromic film.
    Type: Application
    Filed: March 14, 2014
    Publication date: November 20, 2014
    Inventors: Howard S. BERGH, Nicolas TIMMERMAN
  • Patent number: 8887529
    Abstract: A process and apparatus for cutting a continuous glass ribbon involving the use of edge restrainers such as suction cups and clamps connected to an actuator of a robot tooling through a flexible linkage capable of reciprocal motion in the direction of the ribbon velocity. The use of the flexible linkage reduces peak pulling-force when the glass ribbon is pulled or pushed laterally to during bending and separation along a pre-formed score-line. The invention can be advantageously used in the bottom of the draw of a vertical down-draw forming process.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: November 18, 2014
    Assignee: Corning Incorporated
    Inventors: Hung Cheng (Henry) Lu, Wei Xu, Liming Wang, Naiyue Zhou
  • Publication number: 20140290310
    Abstract: Methods for processing glass using select wavelength radiation in a convective environment, broadly referred to as “Local Temporary Annealing”, “LASER Edge Strengthening” and “LASER Enhanced Thermal Strengthening.” Local Temporary Annealing allows strengthened glass to be brought to a neutral stress state so daughter units can be cut from strengthened glass and other processes usually only performed on annealed glass. LASER Edge Strengthening allows surface compression to be thermally imparted to the edges of a whole sheet or daughter units cut from annealed glass, or modification of residual edge stress profiles in strengthened glass to produce stable, strengthened edges. LASER Enhanced Thermal Strengthening allows surface compression to be imparted to a sheet of annealed glass whilst maintaining reduced surface temperatures so the glass has superior geometric stability and surface compression can be imparted at levels not conventionally possible.
    Type: Application
    Filed: July 30, 2013
    Publication date: October 2, 2014
    Inventor: Richard Green
  • Patent number: 8826696
    Abstract: A spray nozzle is used in a process of quenching a hot glass sheet during a laser scoring process or other high energy glass heating process. The nozzle is located in proximity to the glass sheet, creating gas in the liquid used to quench the glass while in the nozzle. The gas is removed from the quenching liquid. Then, the spray nozzle is used to spray the quenching liquid onto the sheet at a location trailing laser scoring of the sheet. The spray nozzle has a purge opening and tubing leading to a discharge location, and can have a sloped passageway that pre-stages gas bubbles near the purge opening. The spray nozzle can include a cooling coil passing around the nozzle passageway to cool the quenching liquid passing through the nozzle, and increase the solubility of bubbles in the quenching liquid.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: September 9, 2014
    Assignee: Corning Incorporated
    Inventors: James William Brown, Patrick Michael Gargano, Keith Mitchell Hill, Xinghua Li, William Paul Ryszytiwskyj, Naiyue Zhou
  • Publication number: 20140216108
    Abstract: A method for separating a thin glass sheet, such as a glass film along a predefined cutting line provides the cutting line immediately has a temperature of greater than 250 K below the transformation point Tg of the glass of the thin sheet of glass, including the input of energy along the cutting line using a laser beam which acts such that a separation of the thin glass sheet occurs.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: SCHOTT AG
    Inventors: Thomas Wiegel, Jürgen Vogt, Andreas Habeck, Georg Sparschuh, Holger Wegener, Gregor Kübart, Angelika Ullmann
  • Publication number: 20140174131
    Abstract: The invention relates to a method for cutting a strengthened glass sheet 10, and the strengthened glass sheet 10 including a front surface layer 13 and a rear surface layer 15 which have a residual compressive stress, and an intermediate layer 17 which is formed between the front surface layer 13 and the rear surface layer 15 and has an inside residual tensile stress is cut by moving an irradiation region 22 of the laser beam. In addition, when initiating the cutting of the strengthened glass sheet 10, a thermal stress which induces the generation of a crack is exerted on a cutting initiation location, the extension of the crack is suppressed simultaneously with the generation of the crack at the cutting initiation location, and then the strengthened glass sheet 10 is cut while suppressing the extension of a crack caused by the inside residual tensile stress in the intermediate layer 17.
    Type: Application
    Filed: February 28, 2014
    Publication date: June 26, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Isao SAITO, Yasunari Iwanaga
  • Publication number: 20140165652
    Abstract: The invention relates to a method for cutting a strengthened glass sheet in which, when a strengthened glass sheet 10 including a front surface layer 13 and a rear surface layer 15 which have a residual compressive stress, and an intermediate layer 17 which has an inside residual tensile stress, is cut by moving an irradiation region 22 of a laser beam so as to have a predetermined curvature radius, an irradiation energy per unit irradiation area of a laser beam 20 to be irradiated on the strengthened glass sheet 10 is increased as a curvature radius decreases. Thereby, it is possible to cut a strengthened glass sheet using a laser beam without causing a deterioration of quality.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 19, 2014
    Applicant: Asahi Glass Company, Limited
    Inventor: Isao SAITO
  • Patent number: 8733129
    Abstract: The present invention provides a method for efficiently manufacturing a glass substrate for magnetic disk having good accuracy of a surface irregularity and an impact resistance. The method includes the steps of: performing press forming to molten glass to prepare a sheet glass material, the sheet glass material having a roughness of the principal surface of 0.01 ?m or less and target flatness of a glass substrate for magnetic disk; chemically strengthening the sheet glass material by dipping the sheet glass material in a chemically strengthening salt, thereby preparing a disk substrate; polishing the principal surfaces of the disk substrate. A thickness of the sheet glass material prepared in the press forming step is larger than a target thickness of the glass substrate for magnetic disk by a polishing quantity of the principal surface polishing step.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: May 27, 2014
    Assignee: Hoya Corporation
    Inventors: Shinji Eda, Hideki Isono
  • Publication number: 20140113797
    Abstract: A device for cutting a brittle member such as a glass is comprised of a laser oscillator configured to radiate a laser beam through a first space onto a first region on the brittle member; a cooling nozzle configured to expel a cooling medium onto a second region distinct from the first region on the brittle member; a baffle so disposed as to leave a gap between the member and the baffle and to have the first region not enclosed by the baffle, and so directed as to deflect a flow of a splash and a mist originating in the second region away from the first region; and a gas nozzle configured to expel a gas toward the gap.
    Type: Application
    Filed: December 24, 2013
    Publication date: April 24, 2014
    Applicant: IHI Corporation
    Inventors: Junichi YAMADA, Norihito Kawaguchi, Yoshiyuki Wada, Tomoo Kusumi, Noriaki Hasegawa, Yuichiro Nakayama, Toshiaki Saitou
  • Publication number: 20140102145
    Abstract: A method and apparatus for replacement of damages display shield (typically glass) covering a display screen on a device, typically a mobile phone. Mobile phones have an electronic display protected by a glass shield. Between the glass and the display is often a plastic polarizing or other intermediary sheet. Removal of a damage glass can be accomplished by cutting thru the polarizer with a moving wire or blade. This separates the glass from the sensitive display and allows replacement of the glass without damaging the more expensive display.
    Type: Application
    Filed: March 8, 2013
    Publication date: April 17, 2014
    Applicant: Saxum LLC
    Inventor: Teo Chong Teck
  • Publication number: 20140102142
    Abstract: Methods of making a substantially rectangular glass cover member includes the step (I) of providing a glass tube including a plurality of substantially rectangular glass segments including respective edges that are integrally attached to one another at attachment locations. The plurality of substantially rectangular glass segments are radially arranged about an axis of the glass tube to define an outer periphery of the glass tube. The method can further include the step (II) of separating the plurality of substantially rectangular glass segments from one another at the attachment locations to provide a plurality of substantially rectangular glass cover members. In still further examples, glass tubes include a plurality of glass segments that each includes a convex surface and a substantially flat surface.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Applicant: Corning Incorporated
    Inventor: THIERRY LUC ALAIN DANNOUX
  • Publication number: 20140102146
    Abstract: A method for cutting a glass plate includes a first step of radiating a laser beam onto a front surface of the glass plate and forming a crack in the glass plate. The laser beam has a wavelength of 5000-11000 nm and becomes a linear beam at the front surface of the glass plate. The linear beam is formed into a shape conforming to a predetermined cut line, has a length greater than or equal to 10 mm along the predetermined cut line and a width less than or equal to 3 mm, and has an intensity distribution substantially uniform along the predetermined cut line. In the first step, a position of the linear beam in the front surface of the glass plate is fixed for a prescribed time, and at least one end part of the linear beam is located at an outer peripheral part of the glass plate.
    Type: Application
    Filed: December 16, 2013
    Publication date: April 17, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Isao SAITO, Tatsuya Iwasaki, Yusuke Echigo
  • Patent number: 8635887
    Abstract: Methods for separating glass articles from glass substrate sheets are described herein. In one embodiment, a method includes focusing a laser beam on at least one surface of the glass substrate sheet such that the laser beam has an asymmetrical intensity distribution at the at least one surface of the glass substrate sheet. The method further includes translating the laser beam on the at least one surface of the glass substrate sheet along a desired groove line to form at least one groove on the at least one surface of the glass substrate sheet. The at least one groove extends partially through a thickness of the glass substrate sheet along the desired groove line and has bevelled or chamfered walls. The glass article may be separated from the glass substrate sheet along the at least one groove.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: January 28, 2014
    Assignee: Corning Incorporated
    Inventors: Matthew L Black, Ivan A Cornejo, Melinda Ann Drake, Sinue Gomez, Lisa Anne Moore, Sergio Tsuda
  • Publication number: 20140007619
    Abstract: A spray nozzle is used in a process of quenching a hot glass sheet during a laser scoring process or other high energy glass heating process. The nozzle is located in proximity to the glass sheet, creating gas in the liquid used to quench the glass while in the nozzle. The gas is removed from the quenching liquid. Then, the spray nozzle is used to spray the quenching liquid onto the sheet at a location trailing laser scoring of the sheet. The spray nozzle has a purge opening and tubing leading to a discharge location, and can have a sloped passageway that pre-stages gas bubbles near the purge opening. The spray nozzle can include a cooling coil passing around the nozzle passageway to cool the quenching liquid passing through the nozzle, and increase the solubility of bubbles in the quenching liquid.
    Type: Application
    Filed: August 15, 2013
    Publication date: January 9, 2014
    Applicant: Corning Incorporated
    Inventors: James William Brown, Patrick Michael Gargano, Keith Mitchell Hill, Xinghua Li, William Paul Ryszytiwskyj, Naiyue Zhou
  • Patent number: 8616024
    Abstract: Methods for separating strengthened glass articles from glass substrate sheets and strengthened glass substrate sheets are described herein. In one embodiment, a method of separating a glass article from a glass substrate sheet includes forming at least one groove on at least one surface of the glass substrate sheet. The at least one groove continuously extends around a perimeter of the glass article and extends partially through a thickness of the glass substrate sheet. The method further includes strengthening the glass substrate sheet by a strengthening process and separating the glass article from the glass substrate sheet along the at least one groove such that one or more edges of the glass article are under compressive stress. In another embodiment, a strengthened glass substrate sheet includes an ion exchanged glass having one or more grooves in one or more strengthened surface layers, the one or more grooves defining glass articles.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: December 31, 2013
    Assignee: Corning Incorporated
    Inventors: Ivan A Cornejo, Gregory Scott Glaesemann, Sinue Gomez, Lisa Anne Moore, Sergio Tsuda, Michael Henry Wasilewski
  • Publication number: 20130340480
    Abstract: A method for producing perforated work pieces from glass, glass ceramics, or semiconductors in a stress-relieving manner is provided. The method includes heating the work piece up to the glass transition temperature and perforating the work piece using a high-voltage electric field of suitable frequency or pulse shape. Then, the perforated work piece is allowed to cool down from the transition temperature range to room temperature at a rate at which the mechanical stresses generated by the perforation process relax.
    Type: Application
    Filed: June 4, 2011
    Publication date: December 26, 2013
    Applicant: SCHOTT AG
    Inventors: Kurt Nattermann, Ulrich Peuchert
  • Patent number: 8607590
    Abstract: Methods for separating glass articles from strengthened glass substrate sheets and strengthened glass substrate sheets are provided. In one embodiment, a method includes forming at least one groove on at least one surface of the glass substrate sheet and strengthening the glass substrate sheet by a strengthening process. The groove defines the glass article and partially extends through a thickness of the glass substrate sheet. The method further includes generating an initiation defect on the groove at an initiation location to cause a through crack to self-propagate through the glass substrate sheet along the groove, thereby separating the glass article from the glass substrate sheet. In another embodiment, a strengthened glass substrate sheet includes a strengthened glass having a glass article groove and an initiation groove on a surface, the glass article groove defining a glass article.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: December 17, 2013
    Assignee: Corning Incorporated
    Inventors: Gregory Scott Glaesemann, Xinghua Li, Daniel Duane Strong
  • Publication number: 20130323469
    Abstract: A method of cutting a glass article includes translating a laser beam relative to a first surface of the glass article. The laser beam includes a beam waist having a center. The center of the beam waist of the laser beam is positioned at or below a second surface of the glass article. The laser beam creates a plurality of defects along a score line in the glass article such that the plurality of defects extends a distance into the glass article, and at least some individual defects of the plurality of defects are non-orthogonal to the first surface of the glass article and are biased in a direction of translation of the laser beam. Glass articles having edge defects are also disclosed.
    Type: Application
    Filed: March 15, 2013
    Publication date: December 5, 2013
    Inventors: Anatoli Anatolyevich Abramov, Naiyue Zhou
  • Publication number: 20130312460
    Abstract: It is an object of the present invention to provide a manufacturing method of a single crystal substrate and to provide an internal modified layer-forming single crystal member, each of which is capable of easily manufacturing a relatively large and thin single crystal substrate.
    Type: Application
    Filed: February 10, 2011
    Publication date: November 28, 2013
    Applicants: NATIONAL UNIVERSITY CORPORATION SAITAMA UNIVERSITY, SHIN-ETSU POLYMER CO., LTD.
    Inventors: Yosuke Kunishi, Hideki Suzuki, Rika Matsuo, Junichi Ikeno
  • Patent number: 8592716
    Abstract: Methods and apparatus are provided for forming an initiation flaw (111) in the surface (114) of a glass sheet or glass ribbon (13). The initiation flaw (111) is used in connection with a laser light beam (121) and a cooling area produced by a cooling nozzle (119) to from a score line (115) in the surface (114) of the sheet or ribbon (13). The initiation flaw (111) is formed by a mechanical scoring head (20) which is carried by moving carriage (14) and which undergoes retrograde motion (19) relative to the carriage (14) so as to increase the time available for forming the initiation flaw (111).
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: November 26, 2013
    Assignee: Corning Incorporated
    Inventors: Anatoli Anatolyevich Abramov, George Davis Treichler, Naiyue Zhou
  • Patent number: 8584490
    Abstract: A method for cutting a sheet of material having a thickness of at most 400 ?m using an electromagnetic wave beam (EWB) such as a laser. The method comprises forming a surface initiation defect and irradiating the sheet along a predetermined path within a short distance from the initiation defect a scanning EWB, such that the sheet is heated and cooled to allow for the propagation of the initiation defect into the predetermined path, and further along the predetermined path to result in a separation of the sheet along the predetermined irradiation path. This method can be advantageously used to cut glass sheets having a thin thickness to result in high-quality edge substantially free of major defects carried over from the initiation defect.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: November 19, 2013
    Assignee: Corning Incorporated
    Inventors: Sean Matthew Garner, Xinghua Li
  • Publication number: 20130291597
    Abstract: A method of cutting a strengthened glass including a front surface layer and a back surface layer in each of which a compression stress remains, respectively, and an intermediate layer formed between the front surface layer and the back surface layer, in which a tensile stress remains, the method includes: cutting the strengthened glass plate by heating the intermediate layer at an irradiation area of a laser beam at a temperature less than or equal to an annealing point while transmitting 70.0% to 99.8% of the laser beam having a wavelength between 800 to 1100 nm injected into the front surface and moving the irradiation area of the laser beam at a speed greater than or equal to 1.0 mm/sec, so that a crack, which penetrates the strengthened glass plate in a thickness direction of the strengthened glass plate, follows the irradiation area.
    Type: Application
    Filed: July 3, 2013
    Publication date: November 7, 2013
    Inventors: Isao SAITO, Akio KOIKE, Yasunari IWANAGA, Yusuke KOBAYASHI, Tatsuya IWASAKI