# US 12,006,249 B2 · Alloy oxide overcoat indium tin oxide coatings, coated glazings, and production methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,249 B2 - Document ID: US12006249B2 - Status: Granted - Kind: B2 - Application number: 17/508,057 - Filed: 2021-10-22 - Published: 2022-02-10 - Granted: 2024-06-11 - Earliest claimed: 2010-01-16 - Assignees: Cardinal CG Company - Applicants: Cardinal CG Company - Inventors: Keith James Burrows; Stephen D. Durst; Kari B. Myli; Gary L. Pfaff - Web page: https://patentgrep.com/patent/US12006249B2 ## CPC - C03C 17/3411: {with at least two coatings of inorganic materials (C03C17/36, C03C17/42 take precedence)} - C03C 17/3417: {all coatings being oxide coatings} - C03C 17/3435: {comprising a nitride, oxynitride, boronitride or carbonitride} - E06B 3/66: Units comprising two or more parallel glass or like panes permanently secured together {(reforming and uniting glass sheets by fusing C03B23/00; joining glass to glass or to other materials C03C27/00; laminated glass B32B17/10)} - E06B 3/6612: {Evacuated glazing units} - E06B 3/66314: {of tubular shape (E06B3/66323 and E06B3/66333 take precedence)} - E06B 3/6715: {specially adapted for increased thermal insulation or for controlled passage of light (E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00)} - B32B 7/025: Electric or magnetic properties - B32B 17/10174: {Coatings of a metallic or dielectric material on a constituent layer of glass or polymer} - B32B 17/10211: {Doped dielectric layer, electrically conductive, e.g. SnO2:F} - C03C 2217/231: In2O3/SnO2 - C03C 2217/94: Transparent conductive oxide layers [TCO] being part of a multilayer coating - C03C 2217/948: Layers comprising indium tin oxide [ITO] - Y02A 30/249: Glazing, e.g. vacuum glazing - Y02B 80/22: Glazing, e.g. vaccum glazing - Y10T 428/24975: No layer or component greater than 5 mils thick - 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 - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention provides transparent conductive coatings based on indium tin oxide. The coating has an oxide overcoat, such as an alloy oxide overcoat. In some embodiments, the coating further includes one or more overcoat films comprising silicon nitride, silicon oxynitride, silicon dioxide, or titanium dioxide. ## Claims ### Claim 1 A multiple-pane insulating glazing unit having a between-pane space and two opposed external pane surfaces, a desired one of the two external pane surfaces bearing a coating comprising both an indium tin oxide film and an aluminum tin oxide film, the aluminum tin oxide film being located over the indium tin oxide film, the aluminum tin oxide film being in direct contact with the indium tin oxide film, wherein the aluminum tin oxide film is an exposed outermost film of the coating, and wherein the aluminum tin oxide film contains tin at a weight percent, on a metal-only basis, of from 50 to 90 percent. ### Claim 2 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the coating is devoid of a metal layer. ### Claim 3 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the aluminum tin oxide film is devoid of metals other than aluminum and tin. ### Claim 4 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the aluminum tin oxide film consists of aluminum tin oxide. ### Claim 5 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein a thickness of the aluminum tin oxide film is between 300 angstroms and 900 angstroms. ### Claim 6 (depends on 5) The multiple-pane insulating glazing unit of claim 5 wherein a thickness of the indium tin oxide film is between 900 angstroms and 2,000 angstroms. ### Claim 7 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the indium tin oxide film is a suboxide while the aluminum tin oxide film is fully oxidized. ### Claim 8 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein a thickness of the aluminum tin oxide film is in a range of 200 to 800 angstroms, and a thickness of the indium tin oxide film is in a range of 1,100 to 1,650 angstroms. ### Claim 9 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the aluminum tin oxide film has a composition produced by sputtering metallic aluminum tin targets in an atmosphere of argon and oxygen. ### Claim 10 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the coating is devoid of a silver layer. ### Claim 11 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the coating has a total thickness of less than 2,400 angstroms. ### Claim 12 (depends on 1) The multiple-pane insulating glazing unit of claim 1 wherein the aluminum tin oxide film comprises both oxidized aluminum and oxidized tin. ### Claim 13 (depends on 1) The multiple-pane insulating glazing unit of claim 1 further comprising a coating that has a metal layer and that is on a surface of the multiple-pane insulating glazing unit different from the desired one of the two external pane surfaces. ### Claim 14 (depends on 1) The multiple-pane insulating glazing unit of claim 1 further comprising a low-emissivity coating on a surface of the multiple-pane insulating glazing unit different from the desired one of the two external pane surfaces. ### Claim 15 A multiple-pane insulating glazing unit having a between-pane space and two opposed external pane surfaces, a desired one of the two external pane surfaces bearing a coating comprising both an indium tin oxide film and an aluminum tin oxide film, the aluminum tin oxide film being located over the indium tin oxide film, the aluminum tin oxide film being in contact with the indium tin oxide film, and the aluminum tin oxide film is an exposed outermost film of the coating, wherein the aluminum tin oxide film contains tin at a weight percent, on a metal-only basis, of from 50 to 90 percent, wherein a thickness of the aluminum tin oxide film is in a range of 200 to 800 angstroms, and a thickness of the indium tin oxide film is in a range of 1,100 to 1,650 angstroms. ### Claim 16 (depends on 15) The multiple-pane insulating glazing unit of claim 15 wherein the coating is devoid of a metal layer. ### Claim 17 (depends on 16) The multiple-pane insulating glazing unit of claim 16 wherein the indium tin oxide film is a suboxide while the aluminum tin oxide film is fully oxidized. ### Claim 18 (depends on 15) The multiple-pane insulating glazing unit of claim 15 wherein the aluminum tin oxide film has a composition produced by sputtering metallic aluminum tin targets in an atmosphere of argon and oxygen. ### Claim 19 (depends on 15) The multiple-pane insulating glazing unit of claim 15 wherein the coating has a total thickness of less than 2,400 angstroms. ### Claim 20 (depends on 15) The multiple-pane insulating glazing unit of claim 15 wherein the aluminum tin oxide film comprises both oxidized aluminum and oxidized tin. ### Claim 21 (depends on 15) The multiple-pane insulating glazing unit of claim 15 further comprising a coating that has a metal layer and that is on a surface of the multiple-pane insulating glazing unit different from the desired one of the two external pane surfaces. ### Claim 22 (depends on 15) The multiple-pane insulating glazing unit of claim 15 further comprising a low-emissivity coating on a surface of the multiple-pane insulating glazing unit different from the desired one of the two external pane surfaces.