Patents by Inventor Vitor Marino Schneider

Vitor Marino Schneider has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210253473
    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: Application
    Filed: May 3, 2021
    Publication date: August 19, 2021
    Inventors: PASCALE ORAM, Rostislav Vatchev Roussev, Vitor Marino Schneider, Emily Elizabeth Young
  • Patent number: 11079280
    Abstract: Apparatus and methods for measuring mode spectra for ion-exchanged glass substrates having a steep index region are disclosed. An interfacing fluid is provided between the coupling prism and the glass substrate. The interfacing fluid thickness is selected so that the variation in modal birefringence with fluid thickness is reduced to an acceptable level. The coupling prism can include a prism coating on the coupling surface so that the substrate-prism interface includes the prism coating. The coupling prism can also include stand-off members that serve to define the thickness of the interfacing fluid.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: August 3, 2021
    Assignee: CORNING INCORPORATED
    Inventors: Rostislav Vatchev Roussev, Vitor Marino Schneider
  • Patent number: 11059744
    Abstract: Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1?0.025t or ?20 ?m and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2?d3 and DOC?0.15t. A method of strengthening a glass article to provide resistance to damage when dropped is also provided.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: July 13, 2021
    Assignee: Corning Incorporated
    Inventors: Pascale Oram, Vitor Marino Schneider
  • Patent number: 11053162
    Abstract: A method of reworking lithium containing ion exchanged glass articles is provided. The method includes a reverse ion exchange process that returns the glass article to approximately the composition of the glass from which the glass article was produced, before being subjected to ion exchange. The reworked glass articles exhibit a K2O concentration profile comprising a portion wherein a K2O concentration increases to a local K2O concentration maximum.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: July 6, 2021
    Assignee: CORNING INCORPORATED
    Inventors: Ryan Claude Andrews, Jill Marie Hall, Pascale Oram, Rostislav Vatchev Roussev, Vitor Marino Schneider, Ljerka Ukrainczyk
  • Publication number: 20210164959
    Abstract: Methods of characterizing ion-exchanged chemically strengthened Li-containing glasses include: a) measuring a mode spectrum of the glass sample; b) using the mode spectrum, estimating a first contribution to the center tension associated with a spike region and estimating a second contribution to the center tension due to a deep region only, wherein the deep region is assumed to follow a power-law stress profile; and c) determining a total center tension by adding of the first and second contributions to the center tension. The methods can be used for quality control during manufacturing of glass samples by comparing the total center tension to a center tension specification that provides optimum strength and durability.
    Type: Application
    Filed: February 8, 2021
    Publication date: June 3, 2021
    Inventors: Rostislav Vatchev Roussev, Vitor Marino Schneider
  • 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
  • Publication number: 20210140836
    Abstract: Methods of improving the measurement of knee stress in an ion-exchanged chemically strengthened Li-containing glass sample that includes a knee are disclosed. One of the methods includes compensating for a shift in the location of the TIR-PR transition location associated with the critical angle location, wherein the shift is due to the presence of a leaky mode. Another method includes applying select criteria to the captured mode spectra image to ensure a high-quality image is used for the knee stress calculation. Another method combines direct and indirect measurements of the knee stress using the mode spectra from multiple samples to obtain greater accuracy and precision as compared to using either the direct measurement method or the indirect measurement method alone. Quality control methods of forming the glass samples using measured mode spectra and related techniques for ensuring an accurate measurement of the knee stress are also disclosed.
    Type: Application
    Filed: January 25, 2021
    Publication date: May 13, 2021
    Inventors: Ryan Claude Andrews, Rostislav Vatchev Roussev, Vitor Marino Schneider
  • Publication number: 20210130231
    Abstract: Glass-based articles are frangible, comprising a peak central tension (CT) in a tensile region that is greater than: (E/68 GPa)*75 MPa*1 mm0.5/?(t), where E is the Young's modulus value of the glass-based substrate utilized to form the glass-based article. The stress profiles of the glass-based articles may comprise: a maximum compressive stress (CSmax) greater than or equal to 150 MPa; a depth of compression (DOC) that is greater than or equal to 0.21t; a peak central tension (CT) in a tensile region that is greater than or equal to 100 MPa to less than or equal to 220 MPa; and/or a negative curvature region, wherein a second derivative of stress as a function of depth is negative.
    Type: Application
    Filed: October 30, 2020
    Publication date: May 6, 2021
    Inventor: Vitor Marino Schneider
  • Publication number: 20210132425
    Abstract: Disclosed devices (100) include a liquid crystal layer (140), a cover glass (105), a polarizer (115), and at least one anti-static coating disposed on at least one major surface (105A, 105C) of the cover glass, at least one major surface (115A, 115C) of the polarizer, or both. Methods for reducing mura (light leakage) in a touch-display device by means of this anti-static coating are also disclosed.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 6, 2021
    Inventors: Idrani Bhattacharyya, Jr-Nan Hu, Tomohiro Ishikawa, Robert George Manley, Jonathan Michael Mis, Vitor Marino Schneider, Dean Michael Thelen, Sujanto Widjaja, Nikolay Zhelev Zhelev
  • Publication number: 20210061705
    Abstract: Glass-based articles comprise stress profiles providing improved scratch resistance. The glass-based articles comprise: a thickness t; a lithium aluminosilicate composition; and a molar ratio of sodium oxide (Na2O) to lithium oxide (Li2O) that is less than or equal to 0.63 at the center of the glass-based article. The articles have a molar ratio of sodium dioxide (Na2O) to lithium dioxide (Li2O) in a post-spike near region that is greater than or equal to 0.9 and/or less than 1.5.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 4, 2021
    Inventors: Yuhui Jin, Joshua James McCaslin, Vitor Marino Schneider, Wei Sun, Taylor Marie Wilkinson
  • Patent number: 10934209
    Abstract: Glass-based articles article are described and have a first surface and a second surface opposing the first surface defining a thickness (t) (mm); and a compressive stress (CS) layer containing ion-exchanged potassium and ion-exchanged silver or ion-exchanged potassium and ion-exchanged copper, the CS layer extending from the first surface to a depth of compress (DOC), wherein the DOC is in a range of 0.1·t and 0.3·t, the CS at the first surface in a range of 300 MPa and 1500 MPa and defining a compressive stress profile including a spike region, a tail region and a knee region between the spike region and the tail region, wherein all points of the stress profile in the spike region comprise a tangent having a value that is in a range of ?15 MPa/micrometer and ?200 MPa/micrometer and all points in the tail region comprise a tangent having a value that is in a range of ?0.01 MPa/micrometer and ?3 MPa/micrometer.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: March 2, 2021
    Assignee: Corning Incorporated
    Inventor: Vitor Marino Schneider
  • Publication number: 20210047237
    Abstract: Glass-based articles have a first surface and a second surface opposing the first surface defining a thickness (t) and a center between the first surface and the second surface, the glass-based article containing Li2O, ion-exchanged potassium and ion-exchanged sodium. The glass-based article has a stress profile including a hump stress region extending from the first surface (or a point below the first surface) to an apex in a range of 0.001·t and 0.1t. Compressive stress at the apex is from 25 to 750 MPa. The hump region comprises an area of increasing stress and an area of decreasing stress. Depth of compression is from 0.1·t to 0.25·t. A tensile stress region extends from the depth of compression to a maximum tensile stress.
    Type: Application
    Filed: January 23, 2019
    Publication date: February 18, 2021
    Inventors: VITOR MARINO SCHNEIDER, TREVOR EDWARD WILANTEWICZ
  • Patent number: 10914721
    Abstract: Methods of characterizing ion-exchanged chemically strengthened Li-containing glasses include: a) measuring a mode spectrum of the glass sample; b) using the mode spectrum, estimating a first contribution to the center tension associated with a spike region and estimating a second contribution to the center tension due to a deep region only, wherein the deep region is assumed to follow a power-law stress profile; and c) determining a total center tension by adding of the first and second contributions to the center tension. The methods can be used for quality control during manufacturing of glass samples by comparing the total center tension to a center tension specification that provides optimum strength and durability.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: February 9, 2021
    Assignee: CORNING INCORPORATED
    Inventors: Rostislav Vatchev Roussev, Vitor Marino Schneider
  • Publication number: 20210033530
    Abstract: The systems and methods include generating polarization-switched (PS) detector and reference signals using a polarization switch controlled by a digital control signal generated by digital input/output card. A gain adjustment is performed on the PS detector and reference signals to define gain-adjusted detector and reference signals. The digital control signal is used to synchronize the gain-adjusted PS detector and reference signals to define gain-adjusted synchronized PS detector and reference signals each having respective steady-state portions. The steady state portions are used to define a measurement signal. The measurement signal is then used to calculate a stress-based characteristic of the sample being measured. The sample can be moved continuously or discretely through different measurement positions, which are synchronized with the operation of the polarization switch using the digital control signal.
    Type: Application
    Filed: July 31, 2020
    Publication date: February 4, 2021
    Inventors: Norman Henry Fontaine, Vitor Marino Schneider, Jayantha Senawiratne
  • Publication number: 20210032151
    Abstract: Methods of processing glass-based substrates to reduce birefringent defects and glass-based substrates are disclosed. In one embodiment, a method for processing a glass-based substrate includes rolling a glass-based material to form the glass-based substrate, and heat treating the glass-based substrate by increasing a temperate of the glass-based substrate, holding the temperature at a maximum temperature for a hold period, and then decreasing the temperature at one or more cooling rates, wherein after the heat treating, the glass-based substrate has a retardance over thickness of 5 nm/mm or less at locations outside of and including 5 mm from any corner of the glass-based substrate and outside of and including 5 mm from any edge of the glass-based substrate.
    Type: Application
    Filed: April 4, 2019
    Publication date: February 4, 2021
    Inventors: Rohit Rai, Vitor Marino Schneider
  • Patent number: 10900850
    Abstract: Methods of improving the measurement of knee stress in an ion-exchanged chemically strengthened Li-containing glass sample that includes a knee are disclosed. One of the methods includes compensating for a shift in the location of the TIR-PR transition location associated with the critical angle location, wherein the shift is due to the presence of a leaky mode. Another method includes applying select criteria to the captured mode spectra image to ensure a high-quality image is used for the knee stress calculation. Another method combines direct and indirect measurements of the knee stress using the mode spectra from multiple samples to obtain greater accuracy and precision as compared to using either the direct measurement method or the indirect measurement method alone. Quality control methods of forming the glass samples using measured mode spectra and related techniques for ensuring an accurate measurement of the knee stress are also disclosed.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: January 26, 2021
    Assignee: CORNING INCORPORATED
    Inventors: Ryan Claude Andrews, Rostislav Vatchev Roussev, Vitor Marino Schneider
  • Publication number: 20200399173
    Abstract: Methods of manufacturing a glass-based article comprise: after mechanical polishing of a glass-based substrate, treating at least one surface of the glass-based substrate for protection of the at least one surface from contamination and/or for removal of contaminants from the at least one surface by a treatment other than ultrasonic cleaning; and exposing the glass-based substrate to an ion exchange treatment after the treating step to form the glass-based article. The treating step includes: exposing the at least one surface to a high pH soaking for removal of contaminants; deionizing the at least one surface for removal of contaminants; and/or applying a temporary coating to the at least one surface for protection of the at least one surface from contamination, and removing the temporary coating prior to the ion exchange treatment step. The ion exchange treatment may comprise a molten salt bath having an increased pH and temperature.
    Type: Application
    Filed: March 8, 2019
    Publication date: December 24, 2020
    Inventors: Jaymin Amin, Matthew John Dejneka, Yuhui Jin, Robert George Manley, Jonathan Michael Mis, Pascale Oram, Vitor Marino Schneider, Charlene Marie Smith, Wei Sun, Wanda Janina Walczak, Liying Zhang
  • Publication number: 20200400613
    Abstract: Methods of characterizing ion-exchanged chemically strengthened glass containing lithium are disclosed. The methods allow for performing quality control of the stress profile in chemically strengthened Li-containing glasses having a surface stress spike produced in a potassium-containing salt, especially in a salt having both potassium and sodium. The method allows the measurement of the surface compression and the depth of the spike, and its contribution to the center tension, as well as the compression at the bottom of the spike, and the total center tension and calculation of the stress at the knee where the spike and the deep region of the stress profile intersect. The measurements are for a commercially important profile that is near-parabolic in shape in most of the interior of the substrate apart from the spike.
    Type: Application
    Filed: September 3, 2020
    Publication date: December 24, 2020
    Inventors: Ryan Claude Andrews, Rostislav Vatchev Roussev, Vitor Marino Schneider
  • Patent number: 10859451
    Abstract: The prism coupling methods disclosed herein are directed to determining a stress characteristic of an original IOX article having a buried IOX region with a buried refractive index profile that is problematic in the sense that it prevents the original IOX article from being measured using a prism coupler system. The methods include modifying the buried IOX region of the original IOX article in a surface portion of the buried IOX region to form a modified IOX article having an unburied refractive index profile that allows the modified IOX article to be measured using a prism coupler. The methods also include measuring a mode spectrum of the modified IOX article using the prism coupler system. The methods further include determining one or more stress characteristic of the original IOX article from the mode spectrum of the modified IOX article.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: December 8, 2020
    Assignee: CORNING INCORPORATED
    Inventor: Vitor Marino Schneider
  • Patent number: 10768143
    Abstract: Methods of characterizing ion-exchanged chemically strengthened glass containing lithium are disclosed. The methods allow for performing quality control of the stress profile in chemically strengthened Li-containing glasses having a surface stress spike produced in a potassium-containing salt, especially in a salt having both potassium and sodium. The method allows the measurement of the surface compression and the depth of the spike, and its contribution to the center tension, as well as the compression at the bottom of the spike, and the total center tension and calculation of the stress at the knee where the spike and the deep region of the stress profile intersect. The measurements are for a commercially important profile that is near-parabolic in shape in most of the interior of the substrate apart from the spike.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: September 8, 2020
    Assignee: CORNING INCORPORATED
    Inventors: Ryan Claude Andrews, Rostislav Vatchev Roussev, Vitor Marino Schneider