# US 8,784,934 B2 · Heat stable SnAl and SnMg based dielectrics > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,934 B2 - Document ID: US8784934B2 - Status: Granted - Kind: B2 - Application number: 13/305,550 - Filed: 2011-11-28 - Published: 2013-05-30 - Granted: 2014-07-22 - Earliest claimed: 2011-11-28 - Assignees: Intermolecular, Inc.; Guardian Industries Corp. - Applicants: Mohd Fadzli Anwar Hassan; Richard Blacker; Guowen Ding; Muhammad Imran; Jingyu Lao; Hien Minh Huu Le; Yiwei Lu; Zhi-Wen Sun - Inventors: Mohd Fadzli Anwar Hassan; Richard Blacker; Guowen Ding; Muhammad Imran; Jingyu Lao; Hien Minh Huu Le; Yiwei Lu; Zhi-Wen Sun - Web page: https://patentgrep.com/patent/US8784934B2 ## CPC - C03C 17/366: {Low-emissivity or solar control coatings} - C03C 17/2453: {Coating containing SnO2} - C03C 17/36: at least one coating being a metal - C03C 17/3618: {Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic} - C03C 17/3642: {the multilayer coating containing a metal layer} - C23C 14/08: Oxides (C23C14/10 takes precedence) - C23C 28/32: {including at least one pure metallic layer} - C23C 28/345: {with at least one oxide layer} - H01B 3/10: metallic oxides (ceramics H01B3/12) - 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 - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract A transparent dielectric composition comprising tin, oxygen and one of aluminum or magnesium with preferably higher than 15% by weight of aluminum or magnesium offers improved thermal stability over tin oxide with respect to appearance and optical properties under high temperature processes. For example, upon a heat treatment at temperatures higher than 500 C, changes in color and index of refraction of the present transparent dielectric composition are noticeably less than those of tin oxide films of comparable thickness. The transparent dielectric composition can be used in high transmittance, low emissivity coated panels, providing thermal stability so that there are no significant changes in the coating optical and structural properties, such as visible transmission, IR reflectance, microscopic morphological properties, color appearance, and haze characteristics, of the as-coated and heated treated products. ## Claims ### Claim 1 A method for making an article comprising: providing a transparent substrate; and depositing a film over the substrate, the film comprising tin oxide doped with a third element, wherein the third element is either aluminum or magnesium, wherein the third element comprises more than 15% by weight of the total metal content of the film, wherein the film is a transparent dielectric film, and wherein the film has an appearance that remains the same, by visual inspection, after a heat treatment. ### Claim 2 (depends on 1) A method as in claim 1, wherein the substrate comprises glass. ### Claim 3 (depends on 1) A method as in claim 1, further comprising at least one of depositing an antireflective film over the substrate; depositing a metallic reflective film over the substrate; or depositing a protective film over the substrate. ### Claim 4 (depends on 1) A method as in claim 1, further comprising: heat treating the article. ### Claim 5 (depends on 4) A method as in claim 4, wherein the heat treating process comprises annealing at a temperature less than 1000 C for less than 10 minutes. ### Claim 6 (depends on 4) A method as in claim 4, wherein the heat treating process comprises annealing at a temperature higher than 500 C for less than 10 minutes. ### Claim 7 A method for making an article comprising: providing a transparent substrate; depositing a film over the substrate, the film comprising tin oxide doped with a third element, wherein the third element is either aluminum or magnesium, wherein the third element comprises more than 15% by weight of the total metal content of the film, wherein the film is a transparent dielectric film, and wherein the film has a first optical appearance; and heat treating the film at a temperature higher than 500 C, wherein the heat treated film has a second optical appearance, wherein the first and second appearance are the same by visual inspection. ### Claim 8 (depends on 7) A method as in claim 7, wherein the substrate comprises glass. ### Claim 9 (depends on 7) A method as in claim 7, further comprising at least one of depositing an antireflective film over the substrate; depositing a metallic reflective film over the substrate; or depositing a protective film over the substrate. ### Claim 10 (depends on 7) A method as in claim 7, wherein the heat treating process comprises annealing at a temperature less than 1000 C. ### Claim 11 A method for making an article comprising: providing a transparent substrate; and depositing a film over the substrate, the film comprising tin oxide doped with magnesium, wherein magnesium comprises more than 15% by weight of the total metal content of the film, and wherein the film is a transparent dielectric film. ### Claim 12 (depends on 11) A method as in claim 11, wherein the substrate comprises glass. ### Claim 13 (depends on 11) A method as in claim 11, further comprising at least one of depositing an antireflective film over the substrate; depositing a metallic reflective film over the substrate; or depositing a protective film over the substrate. ### Claim 14 (depends on 11) A method as in claim 11, further comprising: heat treating the article. ### Claim 15 (depends on 14) A method as in claim 14, wherein the heat treating process comprises annealing at a temperature less than 1000 C for less than 10 minutes. ### Claim 16 (depends on 14) A method as in claim 14, wherein the heat treating process comprises annealing at a temperature higher than 500 C for less than 10 minutes.