# US 11,122,370 B2 · Glass sheet composite > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,370 B2 - Document ID: US11122370B2 - Status: Granted - Kind: B2 - Application number: 16/549,040 - Filed: 2019-08-23 - Published: 2019-12-19 - Granted: 2021-09-14 - Earliest claimed: 2017-02-23 - Assignees: AGC Inc. - Applicants: AGC Inc. - Inventors: Jun Akiyama; Shinya Tahara; Daisuke Uchida; Kento Sakurai - Web page: https://patentgrep.com/patent/US11122370B2 ## CPC - H04R 7/08: comprising superposed layers separated by air or other fluid - B32B 7/05: the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection (using interposed adhesives or bonding materials applied in spaced arrangements B32B7/14) - B32B 17/10045: {with at least one intermediate layer consisting of a glass sheet} - H04R 31/003: {for diaphragms or their outer suspension} - B32B 2307/10: having particular acoustical properties - B32B 2315/08: Glass - H04R 2307/023: Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract A glass sheet composite includes at least two sheets and a liquid layer held between the two sheets, and at least one of the two sheets being a glass sheet. In the glass sheet composite, the two sheets have been disposed so that an edge surface of one of the two sheets and an edge surface of the other sheet are not flush with each other to constitute a step portion having a stair-like shape in a cross-sectional view, and the glass sheet composite further comprising a seal material provided to the step portion to seal up at least the liquid layer. ## Claims ### Claim 1 A glass sheet composite, comprising: two sheets; a liquid layer held between the two sheets; and a seal material, wherein at least one of the two sheets is a glass sheet, wherein the two sheets are disposed so that an edge surface of one of the two sheets and an edge surface of the other sheet are not flush with each other to constitute a step portion having a stair-like shape in a cross-sectional view, the seal material is provided to the step portion to seal up at least the liquid layer, and the liquid layer held between the two sheets is continuous. ### Claim 2 (depends on 1) The glass sheet composite according to claim 1, wherein the seal material adheres to the edge surface of one of the two sheets, an edge surface of the liquid layer, and a main surface of the other sheet in the step portion. ### Claim 3 (depends on 2) The glass sheet composite according to claim 2, wherein the seal material, in a cross-sectional view, has an L-shaped contour extending along the edge surface of one of the sheets, the edge surface of the liquid layer, and the main surface of the other of the sheets. ### Claim 4 (depends on 1) The glass sheet composite according to claim 1, wherein the seal material has a taper surface. ### Claim 5 (depends on 1) The glass sheet composite according to claim 1, wherein the glass sheet has a specific modulus of 2.5×107 m2/s2 or higher. ### Claim 6 (depends on 1) The glass sheet composite according to claim 1, wherein the liquid layer has a viscosity coefficient at 25° C. of 1×10−4 to 1×103 Pa·s and a surface tension at 25° C. of 15-80 mN/m. ### Claim 7 (depends on 1) The glass sheet composite according to claim 1, wherein the liquid layer has a thickness which is 1/10 or less of a total thickness of the two sheets when the total thickness of the two sheets is 1 mm or less, and 100 μm or less when the total thickness of the two sheets is more than 1 mm. ### Claim 8 (depends on 1) The glass sheet composite according to claim 1, wherein the glass sheet is a physically strengthened glass sheet and/or a chemically strengthened glass sheet. ### Claim 9 (depends on 1) The glass sheet composite according to claim 1, wherein the two sheets each have a thickness of 0.01-15 mm. ### Claim 10 (depends on 1) The glass sheet composite according to claim 1, wherein the liquid layer comprises at least one member selected from the group consisting of a dimethyl silicone oil, a methyl phenyl silicone oil, a methyl hydrogen silicone oil, and a modified silicone oil. ### Claim 11 (depends on 1) The glass sheet composite according to claim 1, wherein the seal material comprises at least one member selected from the group consisting of a poly(vinyl acetate)-based material, a poly(vinyl chloride)-based material, a poly(vinyl alcohol)-based material, an ethylene-copolymer-based material, a poly(acrylate)-based material, a cyanoacrylate-based material, a saturated-polyester-based material, a polyamide-based material, a linear-polyimide-based material, a melamine resin, a urea resin, a phenolic resin, an epoxy-based material, a polyurethane-based material, an unsaturated-polyester-based material, a reactive acrylic material, a rubber-based material, a silicone-based material, and a modified-silicone-based material. ### Claim 12 (depends on 1) The glass sheet composite according to claim 1 further comprising another glass sheet. ### Claim 13 (depends on 1) The glass sheet composite according to claim 1, wherein at least one of the glass sheet is made of a laminated glass. ### Claim 14 (depends on 1) The glass sheet composite according to claim 1, wherein at least one outermost surface has a coating or film formed thereon. ### Claim 15 (depends on 1) The glass sheet composite according to claim 1, which has a curved surface shape. ### Claim 16 (depends on 1) A diaphragm, comprising: the glass sheet composite according to claim 1, and at least one vibrator disposed on one or both surfaces of the glass sheet composite. ### Claim 17 (depends on 16) The diaphragm according to claim 16, which has a circumferential length of 1 m or larger. ### Claim 18 (depends on 1) An opening member, comprising: the glass sheet composite according to claim 1, or a diaphragm comprising the glass sheet composite according to claim 1 and at least one vibrator disposed on one or both surfaces of the glass sheet composite. ### Claim 19 (depends on 1) The glass sheet composite according to claim 1, wherein the seal material is not interposed between the two sheets. ### Claim 20 (depends on 1) The glass sheet composite according to claim 1, wherein a thickness of the liquid layer is consistent throughout the glass sheet composite.