# US 11,299,128 B2 · Heating plate, conductive pattern sheet, vehicle, and method of manufacturing heating plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,128 B2 - Document ID: US11299128B2 - Status: Granted - Kind: B2 - Application number: 16/393,057 - Filed: 2019-04-24 - Published: 2019-08-15 - Granted: 2022-04-12 - Earliest claimed: 2014-11-17 - Assignees: Dai Nippon Printing Co., Ltd. - Applicants: Dai Nippon Printing Co., Ltd. - Inventors: Hirotoshi Suetsugu; Manabu Hirakawa; Satoshi Goishihara; Koichi Kinoshita; Hidenori Nakamura; Koujiro Ohkawa; Tetsuo Matsukura; Isao Inoue - Web page: https://patentgrep.com/patent/US11299128B2 ## CPC - B60S 1/026: {using electrical means} - B60S 1/586: {including defroster or demisting means} - H01C 17/003: {using lithography, e.g. photolithography (lithographic compositions and processing in general G03F)} - H05B 3/84: Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields - H05B 2203/002: Heaters using a particular layout for the resistive material or resistive elements - H05B 2203/005: using multiple resistive elements or resistive zones isolated from each other - H05B 2203/007: using multiple electrically connected resistive elements or resistive zones - H05B 2203/011: Heaters using laterally extending conductive material as connecting means - H05B 2203/014: Heaters using resistive wires or cables not provided for in H05B3/54 - B60S: SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR - H01C: RESISTORS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A heating plate includes: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and defining a plurality of opening areas; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the conductive pattern includes a plurality of connection elements that extend between two branch points to define the opening areas; and a rate of the connection elements, which are straight line segments connecting the two branch points, relative to the plurality of connection elements, is less than 20%. ## Claims ### Claim 1 A heating plate that generates heat upon application of voltage thereto, the heating plate comprising: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and including a thin conductive wire; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the thin conductive wire of the conductive pattern has a first surface facing a first one of the pair of glass plates, and a second surface facing the other one of the pair of glass plate, wherein the conductive pattern includes a pattern defining a plurality of opening areas and a plurality of connection elements that extend between two branch points to define the opening areas, wherein an average number of the connection elements extending from one branch point is more than 3.0 and less than 4.0, and wherein, when a width of the first surface of the thin conductive wire is represented as W2a (μm), a width of the second surface of the thin conductive wire is represented as W2b (μm), and a cross-sectional area of the thin conductive wire is represented as S2a (μm2), the following relationships represented (a) and (b) are satisfied 0<|W2a−W2b|≤10 (a), and S2a≥10 (b). ### Claim 2 (depends on 1) The heating plate according to claim 1, wherein the conductive pattern is formed by patterning a conductive layer by etching. ### Claim 3 (depends on 1) The heating plate according to claim 1, wherein the conductive pattern includes opening areas surrounded by four, five, six and seven connection elements, respectively, and wherein among the opening areas included in the conductive pattern, the number of opening areas surrounded by six connection elements is predominant. ### Claim 4 (depends on 1) The heating plate according to claim 1, wherein at least some of the plurality of connection elements have a curved shape or a polygonal line shape, when viewed in a normal direction of a plate plane of the heating plate. ### Claim 5 (depends on 1) The heating plate according to claim 1, wherein the conductive pattern includes a plurality of the thin conductive wires, and wherein the plurality of thin conductive wires are arranged apart from one another in a direction not in parallel with a direction in which the thin conductive wires extend. ### Claim 6 (depends on 5) The heating plate according to claim 5, wherein the thin conductive wires adjacent in the non-parallel direction are connected by a connection wire. ### Claim 7 A conductive pattern sheet used in a heating plate that generates heat upon application of voltage thereto, the conductive pattern sheet comprising: a substrate; and a conductive pattern disposed on the substrate and including a thin conductive wire; wherein the thin conductive wire of the conductive pattern has a proximal surface forming a surface on the side of the substrate, and a distal surface facing the proximal surface, wherein the conductive pattern includes a pattern defining a plurality of opening areas and a plurality of connection elements that extend between two branch points to define the opening areas, wherein an average number of the connection elements extending from one branch point is more than 3.0 and less than 4.0, and wherein, when a width of the distal surface of the thin conductive wire is represented as W2c (μm), a width W2d of the proximal surface of the thin conductive wire is represented as W2d (μm), and a cross-sectional area of the thin conductive wire is represented as S2b (μm2), the following relationships represented (c) and (d) are satisfied 0<|W2c−W2d|≤10 (c), and S2b≥10 (d). ### Claim 8 (depends on 1) A vehicle comprising the heating plate according to claim 1.