To Temper Or Strengthen The Glass Patents (Class 65/30.14)
  • Patent number: 11078106
    Abstract: A method of strengthening an alkali aluminoborosilicate glass. A compressive layer extending from a surface of the glass to a depth of layer is formed by exchanging larger metal cations for smaller metal cations present in the glass. In a second step, metal cations in the glass are exchanged for larger metal cations to a second depth in the glass that is less than the depth of layer and increase the compressive stress of the compressive layer. Formation of the compressive layer and replacement of cations with larger cations can be achieved by a two-step ion exchange process. An alkali aluminoborosilicate glass having a compressive layer and a crack indentation threshold of at least 3000 gf is also provided.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: August 3, 2021
    Assignee: Corning Incorporated
    Inventors: Sinue Gomez, Lisa Ann Lamberson, Robert Michael Morena
  • Patent number: 11021393
    Abstract: A non-frangible glass article strengthened by a dual or two-step ion exchange (IOX) process, where the first IOX step leads to a depth of compressive layer FSM_DOL>0.1·t or, in some embodiments, FSM_DOL>0.15·t, where t is the thickness of the glass, is provided. The glass article has a compressive stress CS1 after the first IOX step at the surface of from 100 MPa to 400 MPa or, in some embodiments, from 150 MPa to 300 MPa. The first IOX step is followed by a second IOX step, leading to a “spike” compressive stress CS2 after the second IOX step at the surface of greater than 500 MPa or, in some embodiments, 700 MPa. The width of the spike generated by the second IOX is between 1 ?m and 30 ?m, or between 8 ?m and 15 ?m, using the criteria where the magnitude (absolute value) of the slope of the spike is higher than 20 MPa/?m.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: June 1, 2021
    Assignee: Corning Incorporated
    Inventors: Pascale Oram, Rostislav Vatchev Roussev, Vitor Marino Schneider, Emily Elizabeth Young
  • Patent number: 10927039
    Abstract: An object of the present invention is to provide a chemically strengthened glass that can effectively suppress strength of a glass from being deteriorated even though performing chemical strengthening and has high transmittance (that is, low reflectivity). The present invention relates to a chemically strengthened glass having a compressive stress layer formed on a surface layer thereof by an ion exchange method, in which the glass contains sodium and boron, and has a delta transmittance being +0.1% or more, and in which a straight line obtained by a linear approximation of a hydrogen concentration Y in a region of a depth X from an outermost surface of the glass satisfies a specific relational equation in X=0.1 to 0.4 (?m).
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: February 23, 2021
    Assignee: AGC Inc.
    Inventors: Izuru Kashima, Yusuke Fujiwara, Kiyoshi Tamai, Yuichi Suzuki, Yoichi Sera, Daisuke Kobayashi
  • Patent number: 10899662
    Abstract: According to an exemplary embodiment of the present disclosure, a method of manufacturing a display window includes preparing a mother substrate, performing a salt treatment on the mother substrate to form a silicon-rich layer in a surface of the mother substrate to a first depth from the surface of the mother substrate, and removing the silicon-rich layer, wherein the first depth is greater than a depth of any cracks in the surface of the mother substrate, and a ratio of silicon content in the silicon-rich layer to a silicon content in the mother substrate is 1.2 to 1.4.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: January 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hoi Kwan Lee, Cheol Min Park, Eun Kyung Yeon, Jeong Seok Lee, Seung Ho Kim
  • Patent number: 10843963
    Abstract: Methods for regenerating poisoned salt bath comprising providing a salt bath comprising at least one of KNO3 and NaNO3, providing an ion-exchangeable substrate comprising lithium cations, contacting at least a portion of the ion-exchangeable substrate with the salt bath, whereby lithium cations in the salt bath diffuse from the ion-exchangeable substrate and are dissolved in the salt bath, and selectively precipitating dissolved lithium cations from the salt bath using phosphate salt. The methods further include preventing or reducing the formation of surface defects in the ion-exchangeable substrate by preventing or reducing the formation of crystals on the surface of the ion-exchangeable substrate upon removal from the salt bath.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: November 24, 2020
    Assignee: Corning Incorporated
    Inventors: Jaymin Amin, Xiaoju Guo, Todd LeRoy Heck, Hongmei Hu, Yuhui Jin, Pascale Oram, Ljerka Ukrainczyk
  • Patent number: 10836674
    Abstract: A carrier apparatus includes an article including a first major surface, a second major surface, a thickness between the first major surface and the second major surface, and an outer edge extending across the thickness between the first major surface and the second major surface. The carrier apparatus includes a coating including a central portion disposed on the first major surface of the article and an outer exposed portion disposed on the outer edge of the article, and a gasket including a first surface contacting the coating. An outer interface between the first surface of the gasket and the coating defines an outer boundary isolating the central portion of the coating from the outer exposed portion of the coating. Methods of processing a carrier apparatus to remove at least a portion of the coating from the article are also provided.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: November 17, 2020
    Assignee: Corning Incorporated
    Inventors: Michael Patrick Donovan, Jacob Immerman, Jenny Kim, Jae-Chang Lee
  • Patent number: 10800142
    Abstract: Laminated glass for automobile windshield includes: a first and a second glass plate facing each other, and an intermediate film disposed between the glass plates and including a plurality of core layers and a plurality of skin layers alternately laminated. The plurality of core layers have a glass transition point of lower than 15° C. The plurality of skin layers have a glass transition point of 15° C. or higher. The plurality of core layers include two or more core layers. The laminated glass has a maximum degree of unevenness of 3 ?m or less in a test area A.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: October 13, 2020
    Assignee: AGC Inc.
    Inventor: Atsushi Nakamura
  • Patent number: 10781135
    Abstract: Apparatus, systems and methods for increasing the strength of glass are disclosed. The use of multi-bath chemical processing for a glass article can facilitate controlled chemical strengthening. Through multi-bath (or multi-step) chemical processing, differing levels of strengthening can be achieved for different portion of glass articles. The multi-bath chemical processing can be achieved through the use of successive chemical baths. Accordingly, glass articles that have undergone multi-bath chemical processing are able to be not only thin but also sufficiently strong and resistant to damage. The strengthened glass articles are well suited for use in consumer products, such as consumer electronic devices (e.g., portable electronic devices). In one embodiment, the glass member can pertain to a glass cover for a housing of an electronic device.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: September 22, 2020
    Assignee: APPLE INC.
    Inventor: Douglas J. Weber
  • Patent number: 10730788
    Abstract: A scratch-resistant glass substrate is prepared by forming a hard, scratch-resistant layer over a major surface of the substrate. The layer is formed from an inorganic material such as a metal oxide, metal nitride, metal carbide, or metal boride using, for example, physical vapor deposition such as reactive or non-reactive sputtering at a process temperature of less than 500° C. The inorganic layer is resistant to micro-ductile scratching, which can safeguard the visible appearance of the glass substrate in use. The glass substrate can include chemically-strengthened glass.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: August 4, 2020
    Assignee: Corning Incorporated
    Inventor: Charles Andrew Paulson
  • Patent number: 10679657
    Abstract: The magnetic tape includes a non-magnetic support; a magnetic layer including a ferromagnetic powder and a binding agent on one surface of the non-magnetic support; and a back coating layer including a non-magnetic powder and a binding agent on the other surface of the non-magnetic support, in which a center line average surface roughness Ra measured regarding a surface of the back coating layer is equal to or smaller than 7.0 nm, and a difference (Safter?Sbefore) between a spacing Safter measured by optical interferometry regarding the surface of the back coating layer after ethanol cleaning and a spacing Sbefore measured by optical interferometry regarding the surface of the back coating layer before ethanol cleaning is greater than 0 nm and equal to or smaller than 15.0 nm.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: June 9, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Takuto Kurokawa, Eiki Ozawa
  • Patent number: 10654742
    Abstract: To provide a method for tempering glass to obtain tempered glass having high surface quality and a deep compression stress layer. The present invention relates to a method for tempering a glass plate comprising a preparation step of preparing a glass plate having a surface temperature of at most the strain point, an internal heating step of heating the internal temperature of the glass plate to be at least the annealing point, while maintaining the surface temperature of the glass plate within 10 minutes, or to be at most the strain point, and a cooling step of cooling the glass plate.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: May 19, 2020
    Assignee: AGC Inc.
    Inventors: Isao Saito, Yasumasa Kato
  • Patent number: 10633280
    Abstract: In one aspect, a method for use in preparing a glass includes performing an ion exchange process by treating the glass with a eutectic mixture including at least a first rubidium salt. In another aspect, a glass is prepared at least in part by performing an ion exchange process by treating the glass with a eutectic mixture including at least a first rubidium salt.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: April 28, 2020
    Assignee: International Business Machines Corporation
    Inventors: Qiang Huang, Kenneth P. Rodbell, Asli Sahin
  • Patent number: 10615371
    Abstract: A display device includes a first substrate, a first emission layer disposed on the first substrate and emitted by a top emission type, a second substrate facing the first substrate and covering the first substrate, and a second emission layer disposed under the second substrate and emitted by a bottom emission type, wherein a portion of the first emission layer and a portion of the second emission layer.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: April 7, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Mu Gyeom Kim
  • Patent number: 10553243
    Abstract: A magnetic-disk glass substrate capable of suppressing turbulence of air flow in a vicinity of an outer circumferential side edge portion of the magnetic disk and suppressing disk flutter is provided. This magnetic-disk glass substrate includes a pair of main surfaces, a side wall surface formed on an outer circumferential side edge surface, and chamfered surfaces interposed between the side wall surface and the main surfaces, respectively. The side wall surface has a roundness of 1.5 ?m or less. A difference in radius between an inscribed circle and a circumcircle of a plurality of outlines of the side wall surface at a plurality of positions that include a central position of the magnetic-disk glass substrate in a thickness direction and are different from each other in the thickness direction is 5 ?m or less.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 4, 2020
    Assignee: HOYA CORPORATION
    Inventor: Masanori Tamaki
  • Patent number: 10457586
    Abstract: Chemically-strengthened thin glass having modified curvature and a method for making the same.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: October 29, 2019
    Assignee: PGBC INTELLECTUAL HOLDINGS, LLC
    Inventors: Richard Ashley Alder, Russell Ashley Alder
  • Patent number: 10450226
    Abstract: A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which the glass has a surface roughness (Ra) of 0.20 nm or higher, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (?m), a surface strength F (N) measured by a ball-on-ring test under the following conditions is (F?1500×t2) relative to a sheet thickness t (mm) of the glass, and a surface of the glass has no polishing flaw: Y=aX+b??(I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L); X: depth from the outermost surface of the glass (?m); a: ?0.270 to ?0.005; and b: 0.020 to 0.220.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: October 22, 2019
    Assignee: AGC Inc.
    Inventors: Izuru Kashima, Yusuke Fujiwara, Kiyoshi Tamai, Yuichi Suzuki, Daisuke Kobayashi, Yoichi Sera, Taku Yamada
  • Patent number: 10435324
    Abstract: A system and method for making an edge section of a thin, high purity fused silica glass sheet. The method includes a step of directing a laser to melt through the glass sheet with localized heating of a narrow portion of the glass sheet to form an edge section of the glass sheet, and continuing the edge section to form a closed loop defining a perimeter of the glass sheet. The method further includes rapidly cooling the glass sheet through the glass transition temperature as the melted glass of the edge section contracts and/or solidifies to form an unrefined-bullnose shape extending between first and second major surfaces of the glass sheet.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: October 8, 2019
    Assignee: Corning Incorporated
    Inventors: Venkata Adiseshaiah Bhagavatula, Daniel Warren Hawtof, Xinghua Li, Gary Edward Merz, John Stone, III
  • Patent number: 10336646
    Abstract: A glass is disclosed that is particularly suitable as pharmaceutical packing medium and as a chemically pre-stressable glass comprising at least the following components (in mol-% on oxide basis): 64-77 SiO2, 5-14 Al2O3, 4-12 Na2O, 1-12 CaO, 0-14 MgO, 0 -2 ZrO2, 0-4.5 TiO2, wherein the ratio Al2O3/Na2O?1, wherein the ratio Al2O3/CaO?1.5, and wherein the total content SiO2+Al2O3<82 mol-%. Preferably, a working temperature T4 of less than 1350° C. and a hydrolytic resistance according to DIN ISO 719 HGB1 and according to ISO 720 HGA are obtained.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: July 2, 2019
    Assignee: SCHOTT AG
    Inventors: Michael Schwall, Edgar Pawlowski
  • Patent number: 10319945
    Abstract: A display device includes a first substrate, a first emission layer disposed on the first substrate and emitted by a top emission type, a second substrate facing the first substrate and covering the first substrate, and a second emission layer disposed under the second substrate and emitted by a bottom emission type, wherein a portion of the first emission layer and a portion of the second emission layer.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: June 11, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Mu Gyeom Kim
  • Patent number: 10273184
    Abstract: A method of performing ion exchange of a thin, flexible glass substrate having an average thickness equal to or less than about 0.3 mm to chemically strengthen the glass substrate is disclosed. The chemically strengthened glass substrate comprises a first compressive stress layer having a first depth of layer, and a second compressive stress layer having a second depth of layer, the first and second stress layers being separated by a layer of tensile stress. A laminated article comprising the chemically strengthened glass substrate is also described.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: April 30, 2019
    Assignee: Corning Incorporated
    Inventors: Sean Matthew Garner, Michael Lesley Sorensen
  • Patent number: 10259745
    Abstract: A method of chemically strengthening a glass. The method includes heating an ion exchange solution to a temperature less than about 360° C., and contacting the glass and the strengthening solution at the temperature for a duration from about 0.5 hours to about 24 hours. The ion exchange solution includes a primary nitrate and at least one monovalent or divalent cation nitrate component in an amount from about 1 wt. % to about 10 wt. %.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: April 16, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Sinue Gomez, Xiaoju Guo, Pascale Oram
  • Patent number: 10202300
    Abstract: A method of manufacturing a laminated glass article is disclosed that includes forming a laminated glass article with at least one glass cladding layer and a glass core layer adhered to the glass cladding layer. The glass core layer is amenable to crystallization and optionally has a viscosity amenable to forming by a fusion lamination method. The method further includes removing a portion of the laminated glass article such that the glass core layer is exposed on at least one edge of the laminated glass article, and crystallizing at least a portion of the exposed glass core layer. A crystallized or semi-crystallized surface of the exposed glass core layer has a lower CTE than a remainder of the glass core layer. A laminated glass article and a glass article having a crystalline or semi-crystalline surface portion that is integral with a bulk of the glass body are also disclosed.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: February 12, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Shandon Dee Hart, Natesan Venkataraman, Angela Jane Wilson
  • Patent number: 10189743
    Abstract: Apparatus, systems and methods for improving strength of a thin glass member for an electronic device are disclosed. In one embodiment, the glass member can have improved strength by using multi-bath chemical processing. The multi-bath chemical processing allows greater levels of strengthening to be achieved for glass member. In one embodiment, the glass member can pertain to a glass cover for a housing of an electronic device.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: January 29, 2019
    Assignee: APPLE INC.
    Inventors: Stephen Paul Zadesky, Christopher Prest, Douglas Weber
  • Patent number: 10125047
    Abstract: Certain example embodiments relate to an improved method of strengthening glass substrates (e.g., soda lime silica glass substrates). In certain examples, a glass substrate may be chemically strengthened by creating an electric field within the glass. In certain cases, the chemical tempering may be performed by surrounding the substrate by a plasma including certain ions, such as Li+, K+, Mg2+, and/or the like. In some cases, these ions may be forced into the glass substrate due to the half-cycles of the electric field generated by the electrodes that formed the plasma. This may advantageously chemically strengthen a glass substrate on a substantially reduced time scale. In other example embodiments, an electric field may be set in a float bath such that sodium ions are driven from the molten glass ribbon into the tin bath, which may advantageously result in a stronger glass substrate with reduced sodium content.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: November 13, 2018
    Assignee: Guardian Glass, LLC
    Inventors: Vijayen S. Veerasamy, Xuequn Hu, Glenn A. Cerny
  • Patent number: 9988304
    Abstract: Certain example embodiments relate to an improved method of strengthening glass substrates (e.g., soda lime silica glass substrates). In certain examples, a glass substrate may be chemically strengthened by creating an electric field within the glass. In certain cases, the chemical tempering may be performed by surrounding the substrate by a plasma including certain ions, such as Li+, K+, Mg2+, and/or the like. In some cases, these ions may be forced into the glass substrate due to the half-cycles of the electric field generated by the electrodes that formed the plasma. This may advantageously chemically strengthen a glass substrate on a substantially reduced time scale. In other example embodiments, an electric field may be set in a float bath such that sodium ions are driven from the molten glass ribbon into the tin bath, which may advantageously result in a stronger glass substrate with reduced sodium content.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: June 5, 2018
    Assignee: Guardian Glass, LLC
    Inventors: Vijayen S. Veerasamy, Xuequn Hu, Glenn A. Cerny
  • Patent number: 9902138
    Abstract: A glass sealing sheet comprising a glass core layer having a first side and a second side, a first cladding layer bonded to the first side of the glass core layer, and/or a second cladding layer bonded to the second side of the glass core layer. The first cladding layer is comprises a glass composition that is absorbing of radiation over at least a portion of an emission wavelength range.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: February 27, 2018
    Assignee: Corning Incorporated
    Inventor: Victoria Ann Edwards
  • Patent number: 9884784
    Abstract: A chemically strengthened glass having a compressive stress layer formed in a surface layer thereof according to an ion exchange method, in which the glass has a surface roughness (Ra) of 0.20 nm or higher, a hydrogen concentration Y in a region to a depth X from an outermost surface of the glass satisfies the following relational equation (I) at X=from 0.1 to 0.4 (?m), a surface strength F (N) measured by a ball-on-ring test under the following conditions is (F?1500×t2) relative to a sheet thickness t (mm) of the glass, and a surface of the glass has no polishing flaw: Y=aX+b??(I) in which meanings of respective symbols in the equation (I) are as follows: Y: hydrogen concentration (as H2O, mol/L); X: depth from the outermost surface of the glass (?m); a: ?0.270 to ?0.005; and b: 0.020 to 0.220.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: February 6, 2018
    Assignee: ASAHI GLASS COMPANY, LIMITED
    Inventors: Izuru Kashima, Yusuke Fujiwara, Kiyoshi Tamai, Yuichi Suzuki, Daisuke Kobayashi, Yoichi Sera, Taku Yamada
  • Patent number: 9840438
    Abstract: A method of making an antimicrobial article including the steps: providing an article having a first surface and ion-exchangeable metal ions, a strengthening bath comprising ion-exchanging metal ions larger in size than the ion-exchangeable metal ions, and an antimicrobial bath comprising antimicrobial ions, ion-exchangeable metal ions and ion-exchanging ions; submersing the article in the strengthening bath to exchange ion-exchangeable metal ions with ion-exchanging metal ions in the strengthening bath to form a compressive stress region extending from the first surface to a first depth; forming a layer on the first surface arranged over the compressive stress region and defining a second surface; and submersing the article and the layer in the antimicrobial bath to exchange ion-exchangeable and ion-exchanging metal ions in the compressive stress region with antimicrobial ions to impart an antimicrobial region with antimicrobial ions extending from the second surface of the layer to a second depth.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: December 12, 2017
    Assignee: CORNING INCORPORATED
    Inventors: Thomas Michael Castle, Georgiy M Guryanov, Ekaterina Aleksandrovna Kuksenkova, Florence Christine Monique Verrier
  • Patent number: 9779190
    Abstract: Methods for compensating for the warp exhibited by three-dimensional glass covers as a result of ion exchange strengthening are provided. The methods use a computer-implemented model to predict/estimate changes to a target three-dimensional shape for the 3D glass cover as a result of ion exchange strengthening. The model includes the effects of ion exchange through the edge of the 3D glass cover. In an embodiment, the inverse of the predicted/estimated changes is used to produce a compensated (corrected) mold which produces as-molded parts which when subjected to ion exchange strengthening have shapes closer to the target shape than they would have had if the mold had not been compensated (corrected).
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: October 3, 2017
    Assignee: Corning Incorporated
    Inventors: Izhar Zahoor Ahmed, Keith Raymond Gaylo, Jacob Immerman, John Richard Ridge, John Robert Saltzer, Jr., Ljerka Ukrainczyk
  • Patent number: 9751802
    Abstract: A method of making a strengthened glass article. The method includes altering the glass structure and subsequently creating a compressive layer extending from the surface of the glass to a depth of layer. In some embodiments, the structure is altered by heat treating the glass at a temperature that is less than the annealing point of the glass, and the compressive layer is formed by ion exchange. A strengthened glass article made by the method is also provided.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 5, 2017
    Assignee: Corning Incorporated
    Inventors: Douglas Clippinger Allan, Adam James Ellison, John Christopher Mauro
  • Patent number: 9751799
    Abstract: A scratch-resistant glass substrate is prepared by forming a hard, scratch-resistant layer over a major surface of the substrate. The layer is formed from an inorganic material such as a metal oxide, metal nitride, metal carbide, or metal boride using, for example, physical vapor deposition such as reactive or non-reactive sputtering at a process temperature of less than 500° C. The inorganic layer is resistant to micro-ductile scratching, which can safeguard the visible appearance of the glass substrate in use. The glass substrate can include chemically-strengthened glass.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: September 5, 2017
    Assignee: Corning Incorporated
    Inventor: Charles Andrew Paulson
  • Patent number: 9722084
    Abstract: There is disclosed a method for chemically treating a display glass substrate by treating at least one surface of the glass substrate with a heated solution containing HCl to form a depletion layer at the surface and under the surface of the glass substrate. The disclosure also relates to display glass substrates containing the depletion layer made by the disclosed process. In addition, the disclosure relates to methods of making thin-film transistors (“TFTs”) on these display glass substrates by depositing a Si layer directly on the chemically treated surface of the glass substrate, and annealing the Si layer to form polycrystalline silicon.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: August 1, 2017
    Assignee: Corning Incorporated
    Inventors: Ta-Ko Chuang, Yunfeng Gu, Robert George Manley
  • Patent number: 9595283
    Abstract: A magnetic-disk glass substrate capable of suppressing turbulence of air flow in a vicinity of an outer circumferential side edge portion of the magnetic disk and suppressing disk flutter is provided. This magnetic-disk glass substrate includes a pair of main surfaces, a side wall surface formed on an outer circumferential side edge surface, and chamfered surfaces interposed between the side wall surface and the main surfaces, respectively. The side wall surface has a roundness of 1.5 ?m or less. A difference in radius between an inscribed circle and a circumcircle of a plurality of outlines of the side wall surface at a plurality of positions that include a central position of the magnetic-disk glass substrate in a thickness direction and are different from each other in the thickness direction is 5 ?m or less.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: March 14, 2017
    Assignee: HOYA CORPORATION
    Inventor: Masanori Tamaki
  • Patent number: 9595286
    Abstract: A magnetic-disk glass substrate has a circular center hole, a pair of main surfaces and an edge surface. The edge surface has a side wall surface and chamfered surfaces interposed between the side wall surface and the main surfaces, and a roundness of an edge surface on an outer circumferential side is 1.5 ?m or less. Also, a midpoint A between centers of two least square circle respectively derived from outlines in a circumferential direction respectively obtained at two positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface on the outer circumferential side, and centers B and C respectively derived from a respective one of two chamfered surfaces on the outer circumferential side in the substrate thickness direction, are located such that a sum of respective distances between A and B, and A and C, is 1 ?m or less.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: March 14, 2017
    Assignee: HOYA CORPORATION
    Inventors: Masanori Tamaki, Takeyoshi Takahashi, Masaaki Ueda
  • Patent number: 9567259
    Abstract: Described herein are various antimicrobial glass articles that have improved resistance to discoloration when exposed to harsh conditions. The improved antimicrobial glass articles described herein generally include a glass substrate that has a low concentration of nonbridging oxygen atoms, a compressive stress layer and an antimicrobial silver-containing region that each extend inward from a surface of the glass substrate to a specific depth, such that the glass article experiences little-to-no discoloration when exposed to harsh conditions. Methods of making and using the glass articles are also described.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 14, 2017
    Assignee: Corning Incorporated
    Inventors: Jaymin Amin, Nicholas Francis Borrelli, Timothy Michael Gross, Odessa Natalie Petzold, Wageesha Senaratne
  • Patent number: 9550695
    Abstract: A method of forming a shaped glass article includes placing a glass sheet on a mold such that a first glass area of the glass sheet corresponds to a first mold surface area of the mold and a second glass area of the glass sheet corresponds to a second mold surface area of the mold. The first glass area and the second glass area are heated such that the viscosity of the second glass area is 8 poise or more lower than the viscosity of the first glass area. A force is applied to the glass sheet to conform the glass sheet to the mold surface. During the heating of the second glass area, the first mold surface area is locally cooled to induce a thermal gradient on the mold.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: January 24, 2017
    Assignee: Corning Incorporated
    Inventors: Jacob Immerman, Thomas A. Keebler, John Robert Saltzer, Jr., Ljerka Ukrainczyk
  • Patent number: 9512035
    Abstract: Described herein are various antimicrobial glass articles that have improved strength and resistance to discoloration. The improved antimicrobial glass articles described herein generally include a glass substrate with a compressive stress layer and an antimicrobial silver-containing region that each extend inward from a surface of the glass substrate to a specific depth. In some embodiments, the compressive stress layer has a compressive stress at the surface of about 500 MPa or greater and the compressive stress decreases monotonically from the surface into the depth of the glass substrate. Methods of making and using the glass articles are also described and include forming a compressive stress layer and forming an antimicrobial silver-containing region by preferentially exchanging a plurality of silver cations in a silver-containing medium for a specific plurality of first cations ions in the glass substrate.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: December 6, 2016
    Assignee: Corning Incorporated
    Inventors: Jaymin Amin, Timothy Michael Gross, Odessa Natalie Petzold, Rostislav Vatchev Roussev
  • Patent number: 9359251
    Abstract: Glasses with compressive stress profiles that allow higher surface compression and deeper depth of layer (DOL) than is allowable in glasses with stress profiles that follow the complementary error function at a given level of stored tension. In some instances, a buried layer or local maximum of increased compression, which can alter the direction of cracking systems, is present within the depth of layer. Theses compressive stress profiles are achieved by a three step process that includes a first ion exchange step to create compressive stress and depth of layer that follows the complimentary error function, a heat treatment at a temperature below the strain point of the glass to partially relax the stresses in the glass and diffuse larger alkali ions to a greater depth, and a re-ion-exchange at short times to re-establish high compressive stress at the surface.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: June 7, 2016
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Richard Michael Fiacco, Timothy Michael Gross, Stephan Lvovich Logunov
  • Patent number: 9359243
    Abstract: Embodiments of glass ceramic articles and precursor glasses are disclosed. In one or more embodiments, the glass-ceramic articles are transparent and include a nepheline phase and a phosphate phase. The glass-ceramic articles are colorless and exhibit a transmittance of about 70% or greater across the visible spectrum. The glass-ceramic articles may optionally include a lithium aluminosilicate phase. The crystals of the glass-ceramic articles may have a major cross-section of about 100 nm or less.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: June 7, 2016
    Assignee: CORNING INCORPORATED
    Inventors: George Halsey Beall, Charlene Marie Smith, Steven Alvin Tietjie
  • Patent number: 9346703
    Abstract: Glasses comprising SiO2, Al2O3, and P2O5 that are capable of chemical strengthened by ion exchange and having high damage resistance. These phosphate-containing glasses have a structure in which silica (SiO2) is replaced by aluminum phosphate (AlPO4) and/or boron phosphate (BPO4).
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: May 24, 2016
    Assignee: CORNING INCORPORATED
    Inventors: Dana Craig Bookbinder, Timothy Michael Gross, Marcel Potuzak
  • Patent number: 9292634
    Abstract: Methods for compensating for the warp exhibited by three-dimensional glass covers as a result of ion exchange strengthening are provided. The methods use a computer-implemented model to predict/estimate changes to a target three-dimensional shape for the 3D glass cover as a result of ion exchange strengthening. The model includes the effects of ion exchange through the edge of the 3D glass cover. In an embodiment, the inverse of the predicted/estimated changes is used to produce a compensated (corrected) mold which produces as-molded parts which when subjected to ion exchange strengthening have shapes closer to the target shape than they would have had if the mold had not been compensated (corrected).
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: March 22, 2016
    Assignee: CORNING INCORPORATED
    Inventors: Izhar Zahoor Ahmed, Keith Raymond Gaylo, Jacob Immerman, John Richard Ridge, John Robert Saltzer, Jr., Ljerka Ukrainczyk
  • Patent number: 9290413
    Abstract: An aluminosilicate glass article having a high compressive stress layer. The glass article comprises at least about 50 mol % SiO2 and at least about 11 mol % Na2O, and has a layer under a compressive stress of at least about 900 MPa and the depth of layer that extends at least about 30 ?m from the surface of the glass article into the glass. A method of making such a glass article is also provided.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: March 22, 2016
    Assignee: CORNING INCORPORATED
    Inventors: Matthew John Dejneka, Adam James Ellison, John Christopher Mauro
  • Patent number: 9221714
    Abstract: An apparatus for chemically toughening glass which can toughen the surface of the glass by inducing compressive stress on the glass surface through ion exchange and a method of chemically toughening glass using the same. The apparatus includes a chemical toughening bath which chemically toughens the glass; a transportation part which transports the glass from upstream of the chemical toughening bath through the chemical toughening bath to downstream of the chemical toughening bath; and a microwave generator disposed above the chemical toughening bath, the microwave generator radiating microwaves to the glass.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: December 29, 2015
    Assignee: SAMSUNG CORNING PRECISION MATERIALS CO., LTD.
    Inventors: Hoikwan Lee, Jaeho Lee, Kyungmin Yoon, Seo-Yeong Cho
  • Patent number: 9214180
    Abstract: The present invention relates to a method for manufacturing a glass substrate for an information recording medium having a high level of cleanness and superior smoothness. The manufacturing method includes a step for washing a disk-shaped glass plate with an acid washing liquid, a step for removing at least part of a surface layer, which is formed on the surface of the glass plate, by performing grinding with diamond abrasion grains, and a step for washing the surface with a neutral or alkaline washing liquid.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: December 15, 2015
    Assignee: HOYA CORPORATION
    Inventors: Yasuhiro Saito, Toshiaki Hashimoto, Yuriko Kudoh
  • Patent number: 9206079
    Abstract: The present invention aims to provide a chemically strengthened glass plate which has a good yield in a cutting process of the chemically strengthened glass plate and has sufficient strength. The chemically strengthened glass plate has a surface compressive stress of not less than 600 MPa at a surface of the chemically strengthened glass plate, and a compressive stress layer containing two types of stress patterns A and B. The stress pattern A is a stress pattern of a surface portion of the glass plate, and the stress pattern B is a stress pattern of an inside of the glass plate. The stress patterns satisfy the formula SA>SB where SA represents a slope of the stress pattern A and SB represents a slope of the stress pattern B when the stress patterns A and B are each approximated by a linear function.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: December 8, 2015
    Assignee: CENTRAL GLASS COMPANY, LIMITED
    Inventors: Yu Matsuda, Tatsuya Tsuzuki, Naoki Mitamura, Tadashi Muramoto
  • Patent number: 9183866
    Abstract: A magnetic disk substrate having a flat main surface, an end face, and a chamfered face formed between the main surface and the end face. The substrate has an offset portion, present on the main surface within a range of 92.0 to 97.0% in a radial direction from a center of the substrate. A distance from the center of the substrate to the end face of the substrate in a radial direction is 100%, the offset portion being raised or lowered with respect to a virtual straight line connecting two points on the main surface, set at positions of 92.0% and 97.0%. A maximum distance from the virtual straight line to the offset portion in a direction perpendicular to the virtual straight line is a “maximum offset value.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: November 10, 2015
    Assignees: HOYA CORPORATION, HOYA GLASS DISK (Thailand) LTD.
    Inventors: Toshio Takizawa, Kraisorn Phandon, Kenichi Nishimori
  • Patent number: 9156732
    Abstract: A method for strengthening a housing comprises the following steps: providing a housing being made of colored glaze and having an initial temperature of about 480° C. to about 550° C.; and spraying the surface of the housing using a spray solution containing potassium nitrate, potassium silicate, diatomite, and water to create an exterior layer on the surface. The exterior layer contains K+ ions, and the concentration of the K+ ions gradually decreases from a maximum value in the area of the outside surface of the exterior layer to zero in the area of the inside of the housing.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: October 13, 2015
    Assignees: SHENZHEN FUTAIHONG PRECISION INDUSTRY CO., LTD., FIH (Hong Kong) Limited
    Inventors: Ren-Bo Wang, Xin-Wu Guan, Po-Feng Ho
  • Patent number: 9156726
    Abstract: Provided is a tempered glass substrate formed by a float method, comprising a bottom surface and a top surface, wherein a compression stress value of the bottom surface is larger than a compression stress value of the top surface.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: October 13, 2015
    Assignee: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Hiroki Katayama, Masashi Tabe, Takuji Oka
  • Patent number: 9145333
    Abstract: Methods are disclosed for producing chemically-strengthened, borosilicate, glass articles. The articles are produced from batch components which are selected, at least in part, based on measured and/or estimated values for the coordination state of B2O3 in the glass. In this way, such chemical-strengthening properties as mutual diffusivity, maximum surface compressive stress, and/or indentation threshold can be improved.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: September 29, 2015
    Assignee: CORNING INCORPORATED
    Inventors: Matthew John Dejneka, John Christopher Mauro, Marcel Potuzak, Morten Mattrup Smedskjaer, Randall Eugene Youngman
  • Patent number: 9140543
    Abstract: Systems and methods for measuring the stress profile of ion-exchanged glass are disclosed, based on the TM and TE guided mode spectra of the optical waveguide formed in the ion-exchanged glass. The method includes digitally defining from the TM and TE guided mode spectra positions of intensity extrema, and calculating respective TM and TE effective refractive indices from these positions. The method also includes calculating TM and TE refractive index profiles nTM(z) and nTE(z) using either an inverse WKB calculation or a fitting process that employs assumed functions for nTM(z) and nTE(z). The method also includes calculating the stress profile S(z)=[nTM(z)?nTE(z)]/SOC, where SOC is a stress optic coefficient for the glass substrate. Systems for performing the method are also disclosed.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: September 22, 2015
    Assignee: CORNING INCORPORATED
    Inventors: Douglas Clippinger Allan, Karl William Koch, III, Rostislav Vatchev Roussev, Robert Anthony Schaut, Vitor Marino Schneider