# US 8,784,933 B2 · Device having reduced friction properties > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,933 B2 - Document ID: US8784933B2 - Status: Granted - Kind: B2 - Application number: 13/777,467 - Filed: 2013-02-26 - Published: 2013-07-04 - Granted: 2014-07-22 - Earliest claimed: 2009-10-23 - Assignees: Schott AG - Applicants: Schott AG - Inventors: Marta Krzyak; Marten Walther; Peter Kracht - Web page: https://patentgrep.com/patent/US8784933B2 ## CPC - G02B 1/115: Multilayers - C03C 17/3417: {all coatings being oxide coatings} - C03C 17/42: at least one coating of an organic material and at least one non-metal coating - C23C 18/1216: {Metal oxides (C23C18/1212 takes precedence)} - C23C 18/1225: {Deposition of multilayers of inorganic material} - C23C 18/1254: {Sol or sol-gel processing} - F21V 3/04: characterised by materials, surface treatments or coatings - C03C 2217/425: consisting of a porous layer - C03C 2217/734: comprising an alternation of high and low refractive indexes - C03C 2217/76: Hydrophobic and oleophobic coatings - C03C 2218/365: Coating different sides of a glass substrate - Y10T 428/249953: Composite having voids in a component [e.g., porous, cellular, etc.] - Y10T 428/265: 1 mil or less - Y10T 428/266: of base or substrate - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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) - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A device, in particular a cover panel for a display device or a monitor auxiliary panel or a surface for input devices, includes a substrate and a coating applied onto the substrate. The coating has a surface having a coefficient of friction in the range between approximately 0.01 and 0.12, in particular between approximately 0.02 and 0.1, or between approximately 0.03 and 0.09. ## Claims ### Claim 1 A method to produce a cover panel for one of a display device, a monitor front panel, and a surface for inputs, the method comprising the steps of: providing a substrate; applying an anti-reflective coating onto said substrate according to a liquid technology, said anti-reflective coating having three individual layers including a titanium dioxide layer, a silicon dioxide layer and a layer including silicon dioxide and titanium dioxide; introducing said substrate coated with said anti-reflective coating into a pressure vessel set to a vacuum in a range of between approximately 10 Pascals (Pa) to 1050 hectopascals (hPa); and applying a cover layer onto said anti-reflective coating such that a coefficient of friction is between approximately 0.01 and 0.12. ### Claim 2 (depends on 1) The method according to claim 1, wherein said liquid technology is a sol-gel technology. ### Claim 3 (depends on 2) The method according to claim 2, further comprising the step of applying said anti-reflective coating onto said substrate as a multi-layer interference coating, including between three and seven layers. ### Claim 4 (depends on 3) The method according to claim 3, wherein said multi-layer interference coating is a three layer interference coating including a first layer having a refractive index between 1.6 and 1.8, a second layer having a refractive index between approximately 1.9 and 2.5and a third layer having a refractive index between approximately 1.4 and 1.5. ### Claim 5 (depends on 1) The method according to claim 1, wherein said pressure vessel is set to between approximately 10 hPa to 500 hPa. ### Claim 6 (depends on 1) The method according to claim 1, wherein said vacuum is one of a fine vacuum in a range between approximately 10 Pa and 100 Pa and a low vacuum above 100 Pa, said vacuum being evacuated. ### Claim 7 (depends on 1) The method according to claim 1, wherein said coefficient of friction is between approximately 0.02 and 0.1. ### Claim 8 (depends on 7) The method according to claim 7, wherein said coefficient of friction is between approximately 0.03 and 0.09. ### Claim 9 (depends on 1) The method according to claim 1, further comprising the step of putting an ultra-hydrophobic coating material into a vaporizer located in said pressure vessel and evaporating and subsequently precipitating said ultra-hydrophobic coating material onto a surface of one of said substrate and said coating such that said one of said substrate and said coating has a coefficient of friction between approximately 0.01 and 0.12. ### Claim 10 (depends on 9) The method according to claim 9, wherein said ultra-hydrophobic coating material is precipitated onto said at least one anti-reflective coating in a form of said cover layer. ### Claim 11 (depends on 9) The method according to claim 9, wherein said coefficient of friction is between approximately 0.02 and 0.1. ### Claim 12 (depends on 11) The method according to claim 11, wherein said coefficient of friction is between approximately 0.03 and 0.09. ### Claim 13 (depends on 9) The method according to claim 9, wherein a temperature in said vaporizer is between approximately 100° C. and 400° C. ### Claim 14 (depends on 13) The method according to claim 13, wherein said substrate exhibits a temperature of between approximately 300 K and 370 K. ### Claim 15 (depends on 1) The method according to claim 1, wherein said cover layer has a thickness