# US 8,465,677 B2 · Electrically conductive composition and fabrication method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,677 B2 - Document ID: US8465677B2 - Status: Granted - Kind: B2 - Application number: 12/813,749 - Filed: 2010-06-11 - Published: 2011-05-05 - Granted: 2013-06-18 - Earliest claimed: 2009-11-02 - Assignees: Industrial Technology Research Institute - Applicants: Chun-An Lu; Hong-Ching Lin - Inventors: Chun-An Lu; Hong-Ching Lin - Web page: https://patentgrep.com/patent/US8465677B2 ## CPC - H01B 1/22: the conductive material comprising metals or alloys - C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)} - C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres} - C09D 11/52: Electrically conductive inks - H01B 1/24: the conductive material comprising carbon-silicon compounds, carbon or silicon - C08K 9/04: Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} - 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}) - 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) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract An electrically conductive composition and a fabrication method thereof are provided. The electrically conductive structure includes a major conductive material and an electrically conductive filler of an energy delivery character dispersed around the major conductive material. The method includes mixing a major conductive material with an electrically conductive filler of an energy delivery character to form a mixture, coating the mixture on a substrate, applying a second energy source to the mixture while simultaneously applying a first energy source for sintering the major conductive material to form an electrically conductive composition with a resistivity smaller than 10×10−3Ω·cm. ## Claims ### Claim 1 An electrically conductive composition, comprising: a major conductive material; and an electrically conductive filler, having an energy delivering ability for delivering an energy provided from an auxiliary energy source to the major conductive material, dispersed around the major conductive material, wherein the major conductive material is 65 to 99.9 percent by weight and consists of a plurality of electrically conductive particles, and the electrically conductive filler is 0.1 to 35 percent by weight, and wherein the electrically conductive particles of the major conductive material are sintered together. ### Claim 2 (depends on 1) The electrically conductive composition as claimed in claim 1, wherein the auxiliary energy source comprises heat, light, microwave with a wavelength of 300MHz-300GHz or laser. ### Claim 3 (depends on 1) The electrically conductive composition as claimed in claim 1, wherein the major conductive material is 75 to 99.9 percent by weight and the electrically conductive filler is 0.1 to 25 percent by weight. ### Claim 4 (depends on 1) The electrically conductive composition as claimed in claim 1, wherein the electrically conductive particle is a metal electrically conductive particle or a non-metal electrically conductive particle. ### Claim 5 (depends on 4) The electrically conductive composition as claimed in claim 4, wherein the electrically conductive particle is a metal electrically conductive particle selected from the group consisting of copper, silver, gold, aluminum, titanium, nickel, tin, iron, platinum and palladium. ### Claim 6 (depends on 4) The electrically conductive composition as claimed in claim 4, wherein the electrically conductive particle is a non-metal electrically conductive particle selected from the group consisting of an electrically conductive oxide, an electrically conductive nitride, an electrically conductive doped oxide and an electrically conductive oxide complex. ### Claim 7 (depends on 6) The electrically conductive composition as claimed in claim 6, wherein the non-metal electrically conductive particle is an electrically conductive oxide selected from the group consisting of indium oxide (In2O3), tin oxide (SnO2), zinc oxide (ZnO) and cadmium oxide (CdO). ### Claim 8 (depends on 6) The electrically conductive composition as claimed in claim 6, wherein the non-metal electrically conductive particle is an electrically conductive nitride comprising titanium nitride (TiN). ### Claim 9 (depends on 6) The electrically conductive composition as claimed in claim 6, wherein the non-metal electrically conductive particle is an electrically conductive doped oxide selected from the group consisting of tin doped indium oxide (Sn:In2O3), indium doped zinc oxide (In:ZnO), cadmium doped zinc oxide (Cd:ZnO), aluminum doped zinc oxide (Al:ZnO), fluorine doped tin oxide (F:SnO2) and tantalum doped titanium oxide (Ta:TiO2). ### Claim 10 (depends on 6) The electrically conductive composition as claimed in claim 6, wherein the non-metal electrically conductive particle is an electrically conductive oxide complex selected from the group consisting of an indium oxide-zinc oxide complex, a cadmium-indium oxide complex (CdIn2O4), a cadmium-tin oxide complex (Cd2SnO4) and a zinc-tin oxide complex (Zn2SnO4). ### Claim 11 (depends on 1) The electrically conductive composition as claimed in claim 1, wherein the shape of the electrically conductive particle comprises a sphere or a sheet, and wherein the sheet-shaped electrically conductive particle has an aspect ratio smaller than 2 or equal to 2. ### Claim 12 (depends on 1) The electrically conductive composition as claimed in claim 1, wherein the electrically conductive particle comprises an electrically conductive particle formed from reducing a precursor, and wherein the precursor comprises a metallo-organic compound represented by (RCOO)yM(y), and wherein R is a straight-chain or a branched-chain CnH2n+1, n is an integer of 5-20, M is metal, selected from the group consisting of copper, silver, gold, aluminum, titanium, nickel, tin, zinc, cadmium, iron, platinum and palladium, and y is a valence of the metal. ### Claim 13 (depends on 1) The electrically conductive composition as claimed in claim 1, wherein the electrically conductive filler is selected from the group consisting of a nanometer scale tube, a nanometer scale line and a nanometer scale sphere. ### Claim 14 (depends on 13) The electrically conductive composition as claimed in claim 13, wherein the electrically conductive filler is a nanometer scale tube selected from the group consisting of a nanometer scale carbon tube, a nanometer scale metal tube and a nanometer scale non-metal tube. ### Claim 15 (depends on 13) The electrically conductive composition as claimed in claim 13, wherein the nanometer scale tube is a nanometer scale non-metal tube selected from the group consisting of titanium oxide, manganese oxide, zinc oxide, silver oxide, iron oxide, tin oxide, indium oxide and nickel oxide. ### Claim 16 (depends on 13) The electrically conductive composition as claimed in claim 13, wherein the electrically conductive filler is a nanometer scale line selected from the group consisting of a nanometer scale metal line and a nanometer scale non-metal line. ### Claim 17 A method for forming an electrically conductive composition, comprising: providing a major conductive material; adding an electrically conductive filler mixing with the major conductive material to form a mixture; and coating a substrate with the mixture, applying a first energy source and a second energy source to the mixture for sintering the major conductive material to form an electrically conductive composition having a resistivity smaller than 10×10−3Ω·cm, wherein the electrically conductive filler has an energy delivering ability for delivering an energy provided from the first energy source and the second energy source to the major conductive material. ### Claim 18 (depends on 17) The method as claimed in claim 17, wherein the first energy source has a temperature range between 90° C. and 150°C. ### Claim 19 (depends on 17) The method as claimed in claim 17, wherein the first energy source and the second energy source are selected from the group consisting of heat, light, energy wave and laser, and wherein the first energy source is different from the second energy source.