# US 2013/0154473 A1 · Adhesive sheet, as well as optical member and organic light emission device using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154473 A1 - Document ID: US20130154473A1 - Status: Published application - Kind: A1 - Application number: 13/818,762 - Filed: 2011-08-16 - Published: 2013-06-20 - Earliest claimed: 2010-09-01 - Assignees: Hitachi, Ltd. - Inventors: Hiroki Kaneko; Hiroshi Sasaki; Akitoyo Konno; Tomokazu Tanase - Web page: https://patentgrep.com/patent/US20130154473A1 ## CPC - C09J 7/10: without carriers - H05B 33/14: characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} - H10K 50/85: Arrangements for extracting light from the devices - C09J 2203/318: for the production of liquid crystal displays - C09J 2433/00: Presence of (meth)acrylic polymer - C09J 2483/00: Presence of polysiloxane - H10K 50/8426: {Peripheral sealing arrangements, e.g. adhesives, sealants} - H10K 50/854: comprising scattering means - H10K 50/858: comprising refractive means, e.g. lenses - Y10T 428/24405: Polymer or resin [e.g., natural or synthetic rubber, etc.] - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An adhesive sheet 1 including a binder 3 and adhesive particles 2 mixed in the binder 3 in which the adhesive particle 2 includes an inorganic particle 21 and a polymer 22, the inorganic particle 21 is chemically bonded with the polymer 22, a portion of the adhesive particles 2 is exposed to the surface of the binder 3, the refractive index of the inorganic particle 21 is higher than the refractive index of the binder 3, and the adhesion of the adhesive particle 21 larger than the adhesion of the inorganic particle 21. An adhesive sheet having high refractive index and high adhesion, as well as an optical member and an organic member and an organic light emission device can be provided. ## Claims ### Claim 1 An adhesive sheet including a binder and adhesive particles mixed in the binder in which the adhesive particle includes an inorganic particle and a polymer, the inorganic particle is chemically bonded with the polymer, the adhesive particles are partially exposed to the surface of the binder, the refractive index of the inorganic particle is higher than the refractive index of the binder, and the adhesion of the adhesive particle is larger than the adhesion of the inorganic particle. ### Claim 2 (depends on 1) An adhesive sheet according to claim 1, wherein the polymer has substituents Y, the inorganic particle and the polymer are chemically bonded by way of a bonding site X, the bonding site X comprises one or more bonds selected from the group consisting of an amide bond, an ester bond, an ether bond, and a urethane bond, and the substituent Y is one or more members selected from the group consisting of amino group, a sulfo group, a carboxyl group, and a hydroxyl group. ### Claim 3 (depends on 1) An adhesive sheet according to claim 1, wherein the number average molecular weight of the polymer is from 200 to 50,000. ### Claim 4 (depends on 1) An adhesive sheet according to claim 1, wherein the inorganic particle is one or more members selected from the group consisting of titanium oxide, zirconium oxide, barium titanate and tin oxide. ### Claim 5 (depends on 1) An adhesive sheet according to claim 1, wherein the average particle diameter of the inorganic particles is 5 to 100 nm. ### Claim 6 (depends on 1) An adhesive sheet according to claim 1, wherein the ratio of the adhesive particles is 5 to 50 vol %. ### Claim 7 (depends on 1) An adhesive sheet according to claim 1, wherein the binder is an acrylic or silicone type resin. ### Claim 8 (depends on 1) An adhesive sheet according to claim 1, wherein a dispersing solvent is further contained. ### Claim 9 (depends on 1) An adhesive sheet according to claim 1, wherein the polymer is a phenol resin or polyamic acid. ### Claim 10 (depends on 1) An adhesive sheet according to claim 1, wherein the polymer is one or more members selected from the group consisting of polyacrylic acid, polyvinyl alcohol, polyaspartic acid, polyglutamic acid, alginic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid, and amylose. ### Claim 11 (depends on 1) An optical member including a base member and an adhesive sheet according to claim 1, in which the adhesive sheet is bonded to the surface of the base member, and the base member comprises one or more members selected from the group consisting of resins, glass, ceramics and metals. ### Claim 12 (depends on 1) An organic light emission device including a lower substrate, an upper substrate, a lower electrode, an upper electrode, an organic layer, and an adhesive sheet according to claim 1, in which the lower electrode and the upper electrode are interposed between the lower substrate and the upper substrate, the organic layer is interposed between the lower electrode and the upper electrode, the adhesive sheet is interposed between the upper substrate and the upper electrode, the organic layer emits light by a voltage application between the upper electrode and the lower electrode, and light generated from the organic layer exits externally at least by way of the upper substrate. ### Claim 13 (depends on 12) An organic light emission device according to claim 12, which further includes a light scattering layer and a transparent resin layer, in which the upper substrate is interposed between the light scattering layer and the transparent resin layer, the transparent resin layer is interposed between the upper substrate and the upper electrode, the adhesive sheet is interposed between the transparent resin layer and the upper electrode, the transparent resin layer has a concavo/convex shape, and the refractive index of the adhesive sheet is higher than the refractive index of the transparent resin layer. ### Claim 14 (depends on 12) An organic light emission device according to claim 12, which further includes a light scattering layer and a transparent resin layer in which the upper substrate is interposed between the upper electrode and the transparent resin layer, the transparent resin layer is interposed between the light scattering layer and the upper substrate, the adhesive sheet is interposed between the upper substrate and the transparent resin layer, the transparent resin layer has a concavo/convex shape, a gap is disposed between the lower substrate and the lower electrode, and the refractive index of the adhesive sheet is higher than the refractive index of the transparent resin layer. ### Claim 15 A method of manufacturing an adhesive sheet including an inorganic particle dispersion step of preparing a liquid dispersion by adding inorganic particles to a dispersing solvent, a reaction step of adding a silane coupling agent to the liquid dispersion thereby bonding the silane coupling agent and the inorganic particle, an adhesive particle preparation step of adding a polymer to a liquid obtained by the reaction step and chemically bonding the inorganic particle and the polymer thereby manufacturing adhesive particles, and a step of mixing the adhesive particles and the binder, in which the refractive index of the inorganic particle is higher than the refractive index of the binder, and the adhesion of the adhesive particle is larger than the adhesion of the inorganic particle.