# US 11,111,173 B2 · Lithium containing glasses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,111,173 B2 - Document ID: US11111173B2 - Status: Granted - Kind: B2 - Application number: 15/799,122 - Filed: 2017-10-31 - Published: 2018-05-10 - Granted: 2021-09-07 - Earliest claimed: 2016-11-07 - Assignees: Corning Incorporated - Applicants: Corning Incorporated - Inventors: Timothy Michael Gross; Xiaoju Guo; Charlene Marie Smith - Web page: https://patentgrep.com/patent/US11111173B2 ## CPC - C03C 3/091: containing aluminium - C03C 3/085: containing an oxide of a divalent metal - C03C 3/097: containing phosphorus, niobium or tantalum - C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)} - H05K 5/03: Covers - G02F 1/133331: {Cover glasses} - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A glass article including, on an oxide basis, from 60 mol % to 74 mol % SiO2, from 7 mol % to 18 mol % Al2O3, from 3 mol % to 16 mol % B2O3, from 0 mol % to 6 mol % Na2O, from 0 mol % to 5 mol % P2O5, from 5 mol % to 11 mol % Li2O, less than or equal to 0.2 mol % SnO2, and from 0.5 mol % to 6.5 mol % divalent cation oxides. The glass article has a molar ratio of Al2O3:(R2O+RO) greater than or equal to 0.9, where R2O is a sum of alkali metal oxides in mol % and RO is a sum of divalent cation oxides in mol %. ## Claims ### Claim 1 A glass article comprising, on an oxide basis: from greater than or equal to 65 mol% to less than or equal to 74 mol% SiO2; from greater than or equal to 7 mol% to less than or equal to 12 mol% Al2O3; from greater than or equal to 5 mol% to less than or equal to 16 mol% B2O3; from greater than or equal to 0 mol% to less than or equal to 4 mol% Na2O; from greater than or equal to 0 mol% to less than or equal to 5 mol% P2O5; from greater than or equal to 5 mol% to less than or equal to 11 mol% Li2O; and from greater than or equal to 0.5 mol% to less than or equal to 6.5 mol% divalent cation oxides, wherein a molar ratio of Al2O3:(R2O+RO) is greater than or equal to 0.9, where R20 is a sum of alkali metal oxides in mol% and RO is a sum of divalent cation oxides in mol%. ### Claim 2 (depends on 1) The glass article of claim 1, wherein the glass article comprises a molar ratio of Li2O:R2O greater than or equal to 0.4,where R2O is a sum of alkali metal oxides in mol%. ### Claim 3 (depends on 1) The glass article of claim 1, wherein the glass article comprises greater than or equal to 80 mol% Al2O3+SiO2+B2O3+P2O5. ### Claim 4 (depends on 1) The glass article of claim 1, wherein the glass article comprises from greater than or equal to 0.5 mol% to less than or equal to 2 mol% SrO. ### Claim 5 (depends on 1) The glass article of claim 1, wherein the glass article comprises from greater than or equal to 0 mol% to less than or equal to 6.5 mol% MgO. ### Claim 6 (depends on 1) The glass article of claim 1, wherein the glass article comprises from greater than or equal to 0 mol% to less than or equal to 5 mol% CaO. ### Claim 7 (depends on 1) The glass article of claim 1, wherein the glass article comprises from greater than or equal to 0 mol% to less than or equal to 2 mol% ZnO. ### Claim 8 (depends on 1) The glass article of claim 1, wherein the glass article comprises from greater than or equal to 0 mol% to less than or equal to 0.2 mol% SnO2. ### Claim 9 (depends on 1) The glass article of claim 1, wherein the glass article has a liquidus viscosity of less than or equal to 300 kP. ### Claim 10 (depends on 1) The glass article of claim 1, wherein the glass article is strengthened by an ion exchange process, such that a compressive stress layer is formed on at least one surface of the glass article. ### Claim 11 (depends on 10) The glass article of claim 10, wherein a depth of compression is greater than or equal to 0.15 t, where t is a thickness of the glass article. ### Claim 12 (depends on 10) The glass article of claim 10, wherein a depth of compression (DOC) is from greater than or equal to 0.15 t to less than or equal to 0.25 t, where t is a thickness of the glass article. ### Claim 13 (depends on 10) The glass article of claim 10, wherein the glass article has a central tension from greater than or equal to 30 MPa to less than or equal to 100 MPa. ### Claim 14 (depends on 1) The glass article of claim 1, wherein the glass article is strengthened by an ion exchange process that adds potassium ions to the glass article and a potassium depth of layer (DOL) is from greater than or equal to 5μm to less than or equal to 30 μm. ### Claim 15 (depends on 14) The glass article of claim 14, wherein a compressive stress layer has a compressive stress at its surface from greater than or equal to 300 MPa to less than or equal to 950 MPa. ### Claim 16 (depends on 14) The glass article of claim 14, wherein the glass article has a Knoop Scratch Lateral Cracking Threshold of greater than or equal to 5 N to less than or equal to 24 N. ### Claim 17 (depends on 14) The glass article of claim 14, wherein the glass article has an Indentation Fracture Threshold of greater than or equal to 15 kgf. ### Claim 18 (depends on 1) A consumer electronic product, comprising: a housing having a front surface, a back surface, and side surfaces; electrical components provided at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent to the front surface of the housing; and and a cover substrate disposed over the display, wherein at least one of a portion of the housing or the cover substrate comprises the glass article of claim 1.