Heating plate, conductive pattern sheet, vehicle, and method of manufacturing heating plate

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%.

1 . A heating plate comprising:
 a pair of glass plates; and   a conductive pattern disposed between the pair of glass plates;   wherein:   the conductive pattern includes a plurality of thin conductive wires that are formed of a patterned copper film and are arranged in one direction, each thin conductive wire extending in the other direction not in parallel with the one direction apart from another thin conductive wire adjacent in the one direction;   a line width of the thin conductive wire is not less than 1 μm and not more than 20 μm; and   a pitch between the adjacent thin conductive wires is not less than 0.3 mm and not more than 2 mm.   
     
     
         2 . A heating plate comprising:
 a pair of glass plates; and   a conductive pattern disposed between the pair of glass plates;   wherein:   the conductive pattern includes a plurality of thin conductive wires that are formed of a patterned copper film and are arranged in a line and space pattern;   a line width of the thin conductive wire is not less than 1 μm and not more than 20 μm; and   a pitch between the adjacent thin conductive wires is not less than 0.3 mm and not more than 2 mm.   
     
     
         3 . The heating plate according to  claim 1 , wherein
 each thin conductive wire extends in a pattern of a polygonal line shape or in a pattern of a corrugated shape.   
     
     
         4 . The heating plate according to any of  claim 1 , wherein
 the copper film is an electrolytic copper foil.   
     
     
         5 . A manufacturing method of a heating plate including a pair of glass plates and a conductive pattern disposed between the pair of glass plates, the manufacturing method comprising:
 laminating a copper film on a substrate; and   forming the conductive pattern including a plurality of thin conductive wires formed by patterning the copper film;   wherein:   the plurality of thin conductive wires are arranged in one direction;   each thin conductive wire extends in the other direction not in parallel with the one direction apart from another thin conductive wire adjacent in the one direction; and   a line width of the thin conductive wire is not less than 1 μm and not more than 20 μm, and a pitch between the adjacent thin conductive wires is not less than 0.3 mm and not more than 2 mm.   
     
     
         6 . A manufacturing method of a heating plate including a pair of glass plates and a conductive pattern disposed between the pair of glass plates, the manufacturing method comprising:
 laminating a copper film on the substrate; and   forming the conductive pattern including a plurality of thin conductive wires formed by patterning the copper film;   wherein:   the plurality of thin conductive wires are arranged in a line and space pattern; and   a line width of the thin conductive wire is not less than 1 μm and not more than 20 μm, and a pitch between the adjacent thin conductive wires is not less than 0.3 mm and not more than 2 mm.   
     
     
         7 . The manufacturing method of a heating plate according to  claim 5 , wherein
 the copper film is an electrolytic copper foil.