Patent application number | Description | Published |
20090100873 | METHOD OF MAKING A GLASS SHEET USING CONTROLLED COOLING - Methods of drawing glass sheet via a downdraw process are provided. In certain aspects, the methods utilize rapid cooling below the root ( | 04-23-2009 |
20100004113 | SYNTHETIC SILICA HAVING LOW POLARIZATION-INDUCED BIREFRINGENCE, METHOD OF MAKING SAME AND LITHOGRAPHIC DEVICE COMPRISING SAME - Disclosed are synthetic silica glass having a low polarization-induced birefringence, process for making the glass and lithography system comprising optical element made of the glass. The silica glass has a polarization-induced birefringence measured at 633 nm of less than about 0.1 nm/cm when subjected to excimer laser pulses at about 193 nm having a fluence of about 40 μJ·cm | 01-07-2010 |
20100009154 | GLASS WITH COMPRESSIVE SURFACE FOR CONSUMER APPLICATIONS - A strengthened glass that does not exhibit frangible behavior when subjected to impact or contact forces, and a method of strengthening a glass. The glass may be strengthened by subjecting it to multiple, successive, ion exchange treatments. The multiple ion exchange treatments provide a local compressive stress maximum at a depth of the strengthened layer and a second local maximum at or near (e.g., within 10 μm) the surface of the glass. | 01-14-2010 |
20110265516 | COMPOSITIONAL CONTROL OF FAST RELAXATION IN DISPLAY GLASSES - Methods are provided for reducing the dimensional changes of a glass substrate during a display manufacturing process. The reductions are achieved by increasing the fast relaxation exhibited by the glass. Test methods are provided for distinguishing the effects on dimensional changes of fast relaxation versus slow relaxation. Glass substrates which exhibit reduced dimensional changes during critical thermal cycles of display manufacturing processes are also disclosed. | 11-03-2011 |
20120083915 | METHODS AND APPARATUS FOR PREDICTING GLASS PROPERTIES - Methods and apparatus for predicting viscosities of glass materials as a function of temperature and composition are provided. Two fitting parameters (fitting coefficients) are used for each of the viscosity-affecting components contained in the material. The parameters can accurately cover a wide range of temperatures (i.e., a wide range of viscosities) and a wide range of compositions. The viscosity predictions can be used as a guide for glass research as well as in feedback control systems for glass manufacturing processes. Methods and apparatus for predicting glass resistivity are also disclosed. | 04-05-2012 |
20120111055 | METHOD OF PRODUCING UNIFORM LIGHT TRANSMISSION FUSION DRAWN GLASS - In a method of making a glass sheet using an overflow fusion downdraw process, a glass sheet quality metric level Q | 05-10-2012 |
20120216565 | METHOD OF PRODUCING CONSTANCY OF COMPRESSIVE STRESS IN GLASS IN AN ION EXCHANGE PROCESS - The present disclosure is directed to a method for producing constancy of the ion-exchanged product stress profile through adjustment of ion-exchange conditions by taking account of the influence of salt bath poisoning on the bath's useful lifetime. The present disclosure is directed to a method of ion-exchange in which the salt bath temperature and salt bath time are adjusted as a function of the amount of alkali metal ions that exchange in the bath. That is, temperature and time are adjusted as a function of salt bath poisoning. Temperature is set to its highest value and time to its shortest value in the starting un-poisoned salt bath, those values chosen to hit target values of surface compressive stress and exchange depth of layer. Temperature is then reduced and time lengthened as salt bath poisoning proceeds, those changes chosen to maintain the same surface compressive stress and exchange depth of layer. | 08-30-2012 |
20120216569 | METHOD OF PRODUCING CONSTANCY OF COMPRESSIVE STRESS IN GLASS IN AN ION-EXCHANGE PROCESS - The present disclosure is directed to a method for producing constancy of the ion-exchanged product stress profile through adjustment of ion-exchange conditions by taking account of the influence of salt bath poisoning on the bath's useful lifetime. The present disclosure is directed to a method of ion-exchange in which the salt bath temperature and salt bath time are adjusted as a function of the amount of alkali metal ions that exchange in the bath. That is, temperature and time are adjusted as a function of salt bath poisoning. Temperature is set to its highest value and time to its shortest value in the starting unpoisoned salt bath, those values chosen to hit target values of surface compressive stress and exchange depth of layer. Temperature is then reduced and time lengthened as salt bath poisoning proceeds, those changes chosen to maintain the same surface compressive stress and exchange depth of layer. | 08-30-2012 |
20130219965 | COUNTER-CURRENT CONTINUOUS ION-EXCHANGE METHOD FOR STRENGTHENING GLASS ARTICLES - This disclosure is directed to a continuous flow ion-exchange system and process (CIOX) in which a fresh molten salt, for example KNO | 08-29-2013 |
20130233020 | METHODS FOR PRODUCING ION-EXCHANGEABLE GLASSES - Computer-implemented methods and apparatus are provided for predicting/estimating chemical depth of layer (DOL) and maximum surface compressive stress (CS) of glass articles after ion-exchange. The methods and apparatus can, for example, be used to select glass compositions, salt bath temperatures, and/or ion-exchange times which provide desired DOL and/or CS values. One or more manufacturing constraints, e.g., constraints on liquidus viscosity, zircon breakdown viscosity, and the like, can be applied to the process of predicting/estimating DOL and/or CS values so that glass compositions selected based on DOL and/or CS values can, for example, be manufactured commercially by a fusion or float process. | 09-12-2013 |
20130260154 | HEAT TREATMENT FOR STRENGTHENING GLASSES - 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. | 10-03-2013 |
20140179510 | GLASS WITH IMPROVED TOTAL PITCH STABILITY - Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties. | 06-26-2014 |
20140242390 | METHODS FOR MEASURING THE ASYMMETRY OF A GLASS-SHEET MANUFACTURING PROCESS - Methods are provided for measuring the asymmetry of glass-sheet manufacturing processes. The methods include subjecting glass sheets or test samples taken from glass sheets to an ion-exchange process and measuring warp values. Metrics for the asymmetry of the glass-sheet manufacturing process are then obtained from the warp values. In one embodiment, the metric is independent of the geometry of the glass sheets or the test samples (the BM | 08-28-2014 |
20140249017 | GLASS WITH IMPROVED PITCH STABILITY - Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties. | 09-04-2014 |
20140345325 | DOUBLE ION EXCHANGE PROCESS - A method for optimizing ion exchange of glass. The glass is ion exchanged in a series of two ion exchange baths. The first ion exchange bath contains an amount of a poisoning ion or salt and the second ion exchange bath contains an amount of the poisoning ion or salt that is less than that in the first bath. When the concentration of the poisoning ion/salt in the first bath reaches a maximum value, the first bath is discarded and replaced by the second bath and a third bath that initially does not contain the poisoning cation/salt replaces the second ion exchange bath. This cycling of baths may be repeated to produce a plurality of glass articles, each having a surface layer under a compressive stress and depth of layer that are within predetermined limits. | 11-27-2014 |