# US 10,479,905 B2 · High-resolution patterning of graphene by screen and gravure printing for highly flexible printed electronics > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,905 B2 - Document ID: US10479905B2 - Status: Granted - Kind: B2 - Application number: 15/836,310 - Filed: 2017-12-08 - Published: 2018-04-12 - Granted: 2019-11-19 - Earliest claimed: 2014-04-29 - Assignees: Northwestern University; Regents of the University of Minnesota - Applicants: Northwestern University; Regents of the University of Minnesota - Inventors: Mark C. Hersam; Ethan B. Secor; Sooman Lim; C. Daniel Frisbie; Lorraine F. Francis; Woo Jin Hyun - Web page: https://patentgrep.com/patent/US10479905B2 ## CPC - C09D 11/52: Electrically conductive inks - C09D 11/033: characterised by the solvent - C09D 11/037: characterised by the pigment - G03F 7/12: Production of screen printing forms or similar printing forms, e.g. stencils - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G) ## Abstract Graphene ink compositions as can be utilized with gravure and screen printing processes, to provide flexible electronic components with high-resolution printed graphene circuitry. ## Claims ### Claim 1 A gravure printing graphene ink composition, said composition comprising non-oxidized graphene, a hydrophobic fluid component and an ethyl cellulose, said hydrophobic fluid component comprising a component being alkanes or a combination of chloroform and alkanes, said composition comprising a graphene-ethyl cellulose solid concentration of 5% to 10% w/v and a viscosity of 0.1 to 1.0 Pa·s. ### Claim 2 (depends on 1) The graphene ink composition of claim 1 printed on a substrate, said composition comprising a graphene content of 30 to 40 wt %. ### Claim 3 A screen printing graphene ink composition, said composition comprising non-oxidized graphene, a hydrophobic fluid component and an ethyl cellulose, said hydrophobic fluid component comprising a component being alkanes or a combination of chloroform and alkanes, said composition comprising a graphene-ethyl cellulose solid concentration of 10% to 20% w/v and a viscosity of 5 to 100 Pa·s. ### Claim 4 (depends on 3) The composition of claim 3 printed on a substrate, said composition comprising a graphene content of at least 50 wt %. ### Claim 5 (depends on 2) The composition of claim 2 comprising an annealation product of said graphene and said ethyl cellulose. ### Claim 6 (depends on 4) The composition of claim 4 comprising an annealation product of said graphene and said ethyl cellulose. ### Claim 7 A gravure printing graphene ink composition, said composition consisting essentially of non- oxidized graphene, a hydrophobic fluid component and an ethyl cellulose, said hydrophobic fluid component comprising a component selected from chloroform, alkanes and a combination thereof, said composition comprising a graphene-ethyl cellulose solid concentration of 5% to 10% w/v and a viscosity of 0.1 to 1.0 Pa·s. ### Claim 8 (depends on 7) The graphene ink composition of claim 7 printed on a substrate, said composition comprising a graphene content of 30 to 40 wt %. ### Claim 9 A screen printing graphene ink composition, said composition consisting essentially of non-oxidized graphene, a hydrophobic fluid component and an ethyl cellulose, said hydrophobic fluid component comprising a component selected from chloroform, alkanes and a combination thereof, said composition comprising a graphene-ethyl cellulose solid concentration of 10% to 20% w/v and a viscosity of 5 to 100 Pa·s. ### Claim 10 (depends on 9) The composition of claim 9 printed on a substrate, said composition comprising a graphene content of at least 50 wt %. ### Claim 11 A gravure printing graphene ink composition comprising a composite of graphene and an ethyl cellulose, and a hydrophobic fluid component comprising an ink solvent and a dispersion solvent, said hydrophobic fluid component capable of providing said ink composition upon removal of said dispersion solvent, said ink solvent being alkanes or a combination of chloroform and alkanes, said composition comprising a graphene-ethyl cellulose solid concentration of 5% to 10% w/v and a viscosity of 0.1 to 1.0 Pa·s. ### Claim 12 (depends on 11) The graphene ink composition of claim 11 printed on a substrate, said composition comprising a graphene content of 30 to 40 wt %. ### Claim 13 A screen printing graphene ink composition comprising a composite of graphene and an ethyl cellulose, and a hydrophobic fluid component comprising an ink solvent and a dispersion solvent, said hydrophobic fluid component capable of providing said ink composition upon removal of said dispersion solvent, said ink solvent being alkanes or a combination of chloroform and alkanes, said composition comprising a graphene-ethyl cellulose solid concentration of 10% to 20% w/v and a viscosity of 5 to 100 Pa·s. ### Claim 14 (depends on 13) The composition of claim 13 printed on a substrate, said composition comprising a graphene content of at least 50 wt %.