JP2016085889A - Intermediate member for heating plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermediate member for heating plate capable of arranging the conductor of a heating plate at a desired position with high accuracy.SOLUTION: An intermediate member 99 includes a sheet with a conductor having a substrate 25, and a conductor provided thereon, and a junction layer 13 laminated on the sheet with a conductor from the side facing the conductor. The conductor has a pair of connection terminals 35 to be applied with a voltage, and a pattern conductor 40 including a linear conductor coupling the pair of connection terminals 35. The junction layer 13 is laminated on the sheet with a conductor, so as to cover both connection terminals 35 and pattern conductor 40, and bonded to the sheet with a conductor in a region other than the region facing the connection terminals 35.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an intermediate member used for a heat generating plate that generates heat when a voltage is applied thereto.

  Conventionally, transparent heating plates that generate heat when a voltage is applied have been used in various fields. As an example, as disclosed in Patent Document 1 and Patent Document 2, window glasses such as a front window and a rear window of a vehicle are exemplified. This heat generating plate constitutes a so-called defroster device, and has a pair of glass plates and a conductor provided between the pair of glass plates. The conductor includes a pair of connection terminal portions and a large number of heating wires connecting the pair of connection terminal portions. Each connection terminal is connected to an external power supply and control circuit. In this prior art, when a voltage is applied to a pair of connection terminal portions, a heating wire made of tungsten, molybdenum or the like raises the temperature of the window glass by its resistance heating. As a result, fogging of the window glass is removed, or snow and ice attached to the window glass are melted, so that the sight of the passenger can be secured.

JP 2013-173402 A JP-A-8-72674

  By the way, the above-mentioned conventional heat generating plate arrange | positions a pair of joining layer between a pair of glass, and also heat-presses a pair of glass in the state which has arrange | positioned the conductor between a pair of joining layers, As a heat generating plate Manufactured. The connection terminal portion and the heating wire forming the conductor are arranged and positioned on one bonding layer before the heating and pressing step. Furthermore, it is necessary to connect a wiring or the like extending to the outside of the heat generating plate on the connection terminal portion.

  The conductor installation process in the above manufacturing method is complicated. In addition, in the heating and pressing step, there is a possibility that the conductor is displaced from the position where it is positioned. That is, in the heat generating plate manufactured by the conventional manufacturing method, it is difficult to form a heating wire with a desired pattern with high accuracy and stability. If the pattern of the heating wire on the heat generating plate is biased, uneven heating will occur, and it may be assumed that the defroster device cannot be partially clouded.

  As a result of intensive studies, the present inventors have found that the above-described problems can be solved by using an intermediate member having a sheet with a conductor and a bonding layer bonded to the sheet with a conductor. . That is, the present invention is based on such knowledge of the present inventors, and provides an intermediate member for a heat generating plate that enables the conductor of the heat generating plate to be arranged at a desired position with high accuracy. For the purpose.

The intermediate member according to the present invention is
An intermediate member used for a heating plate that generates heat when a voltage is applied,
A sheet with a conductor having a substrate and a conductor provided on the substrate;
A bonding layer laminated on the sheet with the conductor from the side facing the conductor,
The conductor has a pair of connection terminal portions to which a voltage is applied, and a pattern conductor including a linear conductor that connects the pair of connection terminal portions,
The bonding layer is laminated with the conductor-attached sheet so as to cover both the connection terminal portion and the pattern conductor,
It joins with the sheet with a conductor in a field other than a field which faces the connection terminal part.

  In the intermediate member according to the present invention, the bonding layer may be bonded to the sheet with the conductor in a region facing the pattern conductor.

  According to the present invention, the conductor of the heat generating plate can be arranged at a desired position with high accuracy.

FIG. 1 is a diagram for explaining an embodiment according to the present invention, and is a perspective view schematically showing a vehicle provided with a heat generating plate. In particular, FIG. 1 schematically shows an automobile provided with a heat generating plate as an example of a vehicle. FIG. 2 is a view showing the heat generating plate from the normal direction of the plate surface. 3 is a cross-sectional view of the heat generating plate of FIG. FIG. 4 is a plan view showing the sheet with conductor from the normal direction of the sheet surface, and is a plan view showing an example of a pattern conductor pattern. FIG. 5 is a diagram showing the sheet with the conductor from the normal direction of the sheet surface, and is a plan view showing another example of the pattern conductor pattern. FIG. 6 is a cross-sectional view corresponding to the line AA in FIG. 4, and is a diagram illustrating an example of a cross-sectional shape of the conductive thin wire. FIG. 7 is a cross-sectional view showing an intermediate member used for manufacturing a heat generating plate. FIG. 8 is a diagram for explaining an example of a method for manufacturing a heat generating plate. FIG. 9 is a diagram for explaining an example of a method of manufacturing a heat generating plate. FIG. 10 is a diagram for explaining an example of a method for manufacturing a heat generating plate. FIG. 11 is a diagram for explaining an example of a method of manufacturing a heat generating plate. FIG. 12 is a diagram for explaining an example of a method of manufacturing a heat generating plate. FIG. 13 is a diagram for explaining an example of a method for manufacturing a heat generating plate. FIG. 14 is a diagram for explaining an example of a method of manufacturing a heat generating plate. FIG. 15 is a diagram for explaining an example of a method for manufacturing a heat generating plate. FIG. 16 is a diagram for explaining an example of a method for manufacturing a heat generating plate, and is a diagram illustrating a state in which the connection portion is overlapped with the connection terminal portion of the intermediate member in FIG. 7. FIG. 17 is a view for explaining a modification of the heat generating plate. FIG. 18 is a diagram for explaining another modification of the heat generating plate. FIG. 19 is a view for explaining still another modified example of the heat generating plate.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product.

  In the present specification, the terms “plate”, “sheet”, and “film” are not distinguished from each other only based on the difference in names. For example, a “sheet with a conductor” is a concept including a member that can be called a plate or a film. Therefore, a “sheet with a conductor” is a “plate with a conductor” or a “film with a conductor”. It cannot be distinguished only by the difference between the called member and the name.

  In addition, “sheet surface (plate surface, film surface)” means a target sheet-like member (plate-like) when the target sheet-like (plate-like, film-like) member is viewed as a whole and globally. It refers to the surface that coincides with the plane direction of the member or film-like member.

  In this specification, “joining” includes not only “main joining” that completely completes joining but also so-called “temporary joining” for temporarily fixing before “main joining”.

  Furthermore, as used in this specification, the shape and geometric conditions and the degree thereof are specified. For example, terms such as “parallel”, “orthogonal”, “identical”, length and angle values, etc. Without being bound by meaning, it should be interpreted including the extent to which similar functions can be expected.

  1-16 is a figure for demonstrating one Embodiment by this invention. First, the heat generating plate 10 will be described with reference to FIGS.

  As shown in FIG. 1, an automobile 1 as an example of a vehicle has window glasses such as a front window, a rear window, and a side window. Here, an example in which the front window 5 is configured by the heat generating plate 10 will be described. The automobile 1 has a power source 7 such as a battery. The heat generating plate 10 and the power source 7 are connected by a connecting portion 8.

  FIG. 2 shows the heat generating plate 10 as viewed from the normal direction of the plate surface. Moreover, the cross section corresponding to the III-III line of the heat generating plate 10 of FIG. 2 is shown in FIG. The heat generating plate 10 includes a pair of curved glass plates 11 and 12, a sheet 20 with a conductor disposed between the pair of curved glass plates 11 and 12, and a bonding layer for bonding the glass plates 11 and 12. 13 and 14. The sheet with a conductor 20 includes a base material 25 and a conductor 30 provided on the base material 25. The conductor 30 has a pair of connection terminal portions 35 to which a voltage is applied and a pattern conductor 40 including a linear conductor 41 that connects the pair of connection terminal portions 35.

  In the example shown in FIGS. 2 and 3, the power supply 7 such as a battery is energized to the conductor 30 of the sheet with conductor 20 via the connection portion 8, and the pattern conductor 40 of the conductor 30 is heated by resistance heating. Let The heat generated in the pattern conductor 40 is transmitted to the glass plates 11 and 12 through the bonding layers 13 and 14, and the glass plates 11 and 12 are heated. Thereby, the cloudiness by the dew condensation adhering to the glass plates 11 and 12 can be removed. Moreover, when snow and ice adhere to the glass plates 11 and 12, this snow and ice can be melted. Therefore, a passenger | crew's visual field is ensured favorable.

  In particular, when the glass plates 11 and 12 are used for a front window, it is preferable to use a glass plate having a high visible light transmittance so as not to obstruct the occupant's field of view. Examples of the material of the glass plates 11 and 12 include soda lime glass and blue plate glass. The glass plates 11 and 12 preferably have a transmittance in the visible light region of 90% or more. Here, the visible light transmittance of the glass plates 11 and 12 is measured within a measurement wavelength range of 380 nm to 780 nm using a spectrophotometer (“UV-3100PC” manufactured by Shimadzu Corporation, JISK0115 compliant product). Of the transmittance at each wavelength. The visible light transmittance may be lowered by coloring a part or the whole of the glass plates 11 and 12. In this case, it is possible to block direct sunlight and to make it difficult to visually recognize the inside of the vehicle from outside the vehicle.

  Moreover, it is preferable that the glass plates 11 and 12 have a thickness of 1 mm or more and 5 mm or less. With such a thickness, the glass plates 11 and 12 excellent in strength and optical characteristics can be obtained.

  Glass plates 11 and 12 and conductor-attached sheet 20 are bonded via bonding layers 13 and 14, respectively. As the bonding layers 13 and 14, layers made of materials having various adhesiveness or tackiness can be used. The bonding layers 13 and 14 preferably have a high visible light transmittance. As a typical joining layer, the layer which consists of polyvinyl butyral (PVB) can be illustrated. The thickness of the bonding layers 13 and 14 is preferably 0.15 mm or more and 0.7 mm or less, respectively.

  The heating plate 10 is not limited to the illustrated example, and may be provided with other functional layers expected to exhibit a specific function. In addition, one functional layer may exhibit two or more functions. For example, the glass plates 11 and 12 and the bonding layers 13 and 14 of the heating plate 10 and the base material of the sheet 20 with a conductor to be described later are used. Some function may be given to at least one of 25. Examples of functions that can be imparted to the heating plate 10 include an antireflection (AR) function, a hard coat (HC) function having scratch resistance, an infrared shielding (reflection) function, an ultraviolet shielding (reflection) function, and a polarization function. An antifouling function and the like can be exemplified.

  Next, the sheet with conductor 20 will be described. The sheet with a conductor 20 includes a base material 25 and a conductor 30 provided on the base material 25. The conductor 30 has a pattern conductor 40 and a pair of connection terminal portions 35 to which a voltage is applied. Each connection terminal portion 35 is connected to the connection portion 8. The connection portion 8 electrically connects the conductor 30 and the power source 7 as a wiring made of, for example, a metal wire. The conductor-attached sheet 20 has substantially the same planar dimensions as the glass plates 11 and 12 and may be disposed over the entire heat generating plate 10 or may be disposed on a part of the heat generating plate 10 such as a front portion of a driver seat. May be arranged only.

  The base material 25 functions as a base material that supports the conductor 30. The base material 25 is a transparent and electrically insulating substrate that generally transmits a wavelength in a visible light wavelength band (380 nm to 780 nm).

  The thermoplastic resin contained in the base material 25 may be any resin as long as it is a thermoplastic resin that transmits visible light. For example, an acrylic resin such as polymethyl methacrylate, a polyolefin resin such as polypropylene, and a polyester such as polyethylene terephthalate. Examples thereof include resins, cellulose resins such as triacetyl cellulose (cellulose triacetate), polyvinyl chloride, polystyrene, polycarbonate resins, AS resins, and the like. In particular, acrylic resin and polypropylene are preferable because they have excellent optical properties and good moldability.

  Moreover, it is preferable that the base material 25 has a thickness of 0.03 mm or more and 0.15 mm or less in consideration of retention of the patterned conductor 40 being manufactured, light transmittance, and the like.

  Next, the conductor 30 will be described. The conductor 30 has a connection terminal portion 35 and a pattern conductor 40. The connection terminal portion 35 is a terminal connected to the connection portion 8. Each connection terminal portion 35 is formed in a linear shape and extends along the edge of the sheet with the conductor. Each connection terminal portion 35 has a sufficient width so as to be maintained at a constant voltage over its entire length. This connection terminal part 35 is formed using the material similar to the pattern conductor 40 mentioned later, for example.

  The pattern conductor 40 will be described with reference to FIGS. 4 and 5 are plan views of the conductor-attached sheet 20 as viewed from the normal direction of the sheet surface, and are diagrams illustrating an example of an arrangement pattern of the pattern conductors 40. FIG.

  The pattern conductor 40 includes a linear conductor 41 that connects between the pair of connection terminal portions 35. The pattern conductor 40 is energized from the power source 7 such as a battery through the connection portion 8 and the connection terminal portion 35, and generates heat by resistance heating. And when this heat | fever is transmitted to the glass plates 11 and 12 through the joining layers 13 and 14, the glass plates 11 and 12 are warmed.

  In the example shown in FIG. 4, in the pattern conductor 40, the linear conductors 41 are arranged in a mesh pattern that defines a large number of openings 43. The patterned conductor 40 includes a plurality of connecting elements 44 extending between the two branch points 42 and defining an opening 43. That is, the linear conductor 41 of the pattern conductor 40 is configured as a collection of a large number of connection elements 44 that form branch points 42 at both ends. In particular, in the illustrated example, the three connection elements 44 are connected at an equal angle at the branch point 42, thereby forming a large number of honeycomb-shaped openings 43 having the same shape surrounded by the six linear conductors 41. Has been.

  In the illustrated example, the pattern conductor 40 has a mesh pattern in which honeycomb-shaped openings 43 having the same shape are regularly arranged. However, the pattern conductor 40 is not limited to such a mesh pattern, and may be a triangle, a rectangle, or the like. Mesh pattern in which irregularly shaped openings 43 are irregularly arranged, such as a mesh pattern in which openings 43 of the same shape are regularly arranged, a mesh pattern in which irregularly shaped openings 43 are regularly arranged, and a Voronoi mesh Various mesh patterns such as patterns can be used. Furthermore, the pattern of the pattern conductor 40 is not limited to a mesh pattern. The pattern conductor 40 shown in FIG. 5 has a plurality of linear conductors 41 that connect the pair of connection terminal portions 35, and the plurality of linear conductors 41 are arranged apart from each other. ing. Each linear conductor 41 may extend between the pair of connection terminal portions 35 in a pattern such as a straight line, a broken line, a wavy line, or a sine wave.

  Examples of the material for forming such a patterned conductor 40 include one or more of gold, silver, copper, platinum, aluminum, chromium, molybdenum, nickel, titanium, palladium, indium, tungsten, and alloys thereof. Can be illustrated.

  FIG. 6 is a cross-sectional view corresponding to the line AA in FIG. 4, and is a diagram illustrating an example of a cross-sectional shape of the linear conductor 41. A plurality of linear conductors 41 constituting the pattern conductor 40 are formed on the base material 25. In the illustrated example, the linear conductor 41 has a surface 41a on the base material 25 side, a surface 41b on the opposite side of the base material 25, and side surfaces 41c and 41d, and has a substantially rectangular cross section as a whole. . The width W of the linear conductor 41, that is, the width W along the sheet surface of the base material 25 is 2 μm or more and 20 μm or less, and the height (thickness) H, that is, the normal line to the sheet surface of the base material 25 The height (thickness) H along the direction is preferably 1 μm or more and 60 μm or less. According to the linear conductor 41 having such dimensions, since the linear conductor 41 is sufficiently thinned, the pattern conductor 40 can be effectively invisible.

  Further, the linear conductor 41 is formed on the first dark color layer 46 provided on the substrate 25, the conductive metal layer 45 provided on the first dark color layer 46, and the conductive metal layer 45. A second dark color layer 47 provided is included. In other words, of the surface of the conductive metal layer 45, the first dark color layer 46 covers the surface on the substrate 25 side, and among the surface of the conductive metal layer 45, the surface opposite to the substrate 25 and The second dark color layer 47 covers both side surfaces.

  The conductive metal layer 45 made of a metal material exhibits a relatively high reflectance. When the light is reflected by the conductive metal layer 45 forming the linear conductor 41 of the pattern conductor 40, the reflected light is visually recognized, which may hinder the occupant's field of view. Further, when the conductive metal layer 45 is visually recognized from the outside, the designability may be deteriorated. Therefore, the dark color layers 46 and 47 are disposed on at least a part of the surface of the conductive metal layer 45. The dark color layers 46 and 47 may be layers having a visible light reflectance lower than that of the conductive metal layer 45, and are dark color layers such as black. The dark color layers 46 and 47 make it difficult for the conductive metal layer 45 to be visually recognized, so that the occupant's field of view can be favorably secured. Moreover, the fall of the designability when seen from the outside can be prevented.

  Next, a method for manufacturing the heating plate 10 will be described. In the manufacturing method described below, the heat generating plate 10 is manufactured using the intermediate member 99. First, the intermediate member 99 and the manufacturing method thereof will be described, and then the manufacturing method of the heat generating plate 10 using the intermediate member 99 will be described.

  As shown in FIG. 7, the intermediate member 99 includes a sheet 20 with a conductor and a bonding layer 13 laminated on the sheet 20 with a conductor. Among these, the sheet 20 with a conductor forms the sheet 20 with a conductor of the heat generating plate 10 already described in detail. Therefore, the sheet 20 with the conductor of the intermediate member 99 has the same configuration as the sheet 20 with the conductor of the heating plate 10 described above. On the other hand, the bonding layer 13 forms the bonding layer 13 of the heat generating plate 10 already described in detail. However, in the intermediate member 99, the conductor-attached sheet 20 and the bonding layer 13 are bonded only in a region excluding the region where the connection terminal portion 35 is attached and the vicinity thereof.

  Next, a method for manufacturing the intermediate member 99 and a method for manufacturing the heat generating plate 10 using the intermediate member 99 will be described.

  First, an example of a method for manufacturing the sheet with conductor 20 will be described with reference to FIGS. 8-15 is sectional drawing which shows an example of the manufacturing method of the sheet | seat 20 with a conductor in order.

  First, as shown in FIG. 8, the base material 25 is prepared. The base material 25 is a transparent and electrically insulating substrate that generally transmits a wavelength in a visible light wavelength band (380 nm to 780 nm).

  Next, as shown in FIG. 9, a first dark color layer 46 is provided on the substrate 25. For example, the first dark color layer 46 is formed on the substrate 25 by a plating method including electroplating and electroless plating, a sputtering method, a CVD method, a PVD method, an ion plating method, or a combination of these two or more. Can be provided. Various known materials can be used as the material for the first dark color layer 46. For example, copper nitride, copper oxide, nickel nitride and the like can be exemplified.

  Next, as shown in FIG. 10, a conductive metal layer 45 is provided on the first dark color layer 46. As described above, the conductive metal layer 45 is a layer made of one or more of gold, silver, copper, platinum, aluminum, chromium, molybdenum, nickel, titanium, palladium, indium, tungsten, and alloys thereof. The conductive metal layer 45 can be formed by a known method. For example, a method of attaching a metal foil such as copper foil using a weather-resistant adhesive, a plating method including electroplating and electroless plating, a sputtering method, a CVD method, a PVD method, an ion plating method, or these A method of combining two or more can be employed.

  Next, as shown in FIG. 11, a resist layer 48 is provided on the conductive metal layer 45. The resist layer 48 is a resin layer having photosensitivity to, for example, light in a specific wavelength range, for example, ultraviolet rays. This resin layer may be formed by sticking a resin film, or may be formed by coating a fluid resin. The specific photosensitive characteristics of the resist layer 48 are not particularly limited. For example, as the resist layer 48, a photocurable photosensitive material may be used, or a photodissolvable photosensitive material may be used.

  Thereafter, as shown in FIG. 12, the resist layer 48 is patterned to form a resist pattern 49. As a method of patterning the resist layer 48, various known methods can be employed. In this example, a resin layer having photosensitivity to light in a specific wavelength region, for example, ultraviolet rays, is used as the resist layer 48. Patterning is performed using a known photolithography technique. First, a mask in which a portion to be patterned is opened or a mask in which a portion to be patterned is shielded is disposed on the resist layer 48, and the resist layer 48 is irradiated with ultraviolet rays through this mask. Thereafter, the portion where the ultraviolet rays are shielded by the mask or the portion irradiated with the ultraviolet rays is removed by means such as development. Thereby, the patterned resist pattern 49 can be formed.

  Next, as shown in FIG. 13, the conductive metal layer 45 and the first dark color layer 46 are etched using the resist pattern 49 as a mask. By this etching, the conductive metal layer 45 and the first dark color layer 46 are patterned into a pattern substantially the same as the resist pattern 49. The etching method is not particularly limited, and a known method can be employed. Known methods include, for example, wet etching using an etchant, plasma etching, and the like. Thereafter, as shown in FIG. 14, the resist pattern 49 is removed.

  Finally, as shown in FIG. 15, the second dark color layer 47 is formed on the surface 41b and the side surfaces 41c and 41d on the opposite side of the substrate 25 of the conductive metal layer 45. For example, the second dark color layer 47 is subjected to a darkening process (blackening process) on a part of the material forming the conductive metal layer 45, and the metal oxide or metal sulfide is formed from a part of the conductive metal layer 45. A second dark color layer 47 made of a material can be formed. Alternatively, the second dark color layer 47 may be provided on the surface of the conductive metal layer 45, such as a coating film of dark color material or a plating layer of nickel or chromium. Alternatively, the second dark color layer 47 may be provided by roughening the surface of the conductive metal layer 45.

  In the example shown in FIG. 15, the second dark color layer 47 is formed on the surface 41 b and the side surfaces 41 c and 41 d on the opposite side of the base material 25 of the conductive metal layer 45. The second dark color layer 47 may be formed only on the opposite surface 41 b of the 45 base material 25 or only on the side surfaces 41 c and 41 d of the conductive metal layer 45.

  In the case where the second dark color layer 47 is formed only on the surface 41b on the opposite side of the base 25 of the conductive metal layer 45, for example, the second dark layer 47 is formed on the conductive metal layer 45 after the step shown in FIG. A dark color layer 47 and a resist layer 48 are provided in this order, and the resist layer 48 is patterned to form a resist pattern 49. Thereafter, the second dark color layer 47, the conductive metal layer 45, and the first dark color layer 46 may be etched using the resist pattern 49 as a mask.

  When the second dark color layer 47 is formed only on the side surfaces 41c and 41d of the conductive metal layer 45, for example, the second dark color layer without removing the resist pattern 49 after the step shown in FIG. 47 is formed, and then the resist pattern 49 is removed.

  If the first dark color layer 46 is not necessary, the step of providing the first dark color layer 46 on the substrate 25 shown in FIG. 9 may be omitted.

  The sheet 20 with a conductor is manufactured as described above. Next, the intermediate member 99 is manufactured by laminating the bonding layer 13 on the sheet with conductor 20 from the pattern conductor 40 side and bonding the sheet with conductor 20 and the bonding layer 13 together. The bonding of the sheet with conductor 20 and the bonding layer 13 may be a main bonding in which the bonding strength is about the same as the bonding strength in the final heating plate 10, or in the final heating plate 10. Temporary bonding may be used in which bonding is performed with a bonding strength weaker than the bonding strength. As an example, the sheet 20 with a conductor and the bonding layer 13 are bonded by heating and pressing at a lower pressure and / or lower temperature than a heating and pressing step, for example, when the final heating plate 10 is manufactured. It can be achieved by carrying out the process. Or the sheet | seat 20 with a conductor and the joining layer 13 can also be joined by providing adhesiveness to a part of surface of the joining layer 13. FIG.

  In the intermediate member 99, the bonding layer 13 is laminated with the conductor-attached sheet 20 so as to cover a region where the connection terminal portion 35 and the pattern conductor 40 of the conductor-attached sheet 20 are provided. However, the bonding layer 13 is not bonded to the region where the connection terminal portion 35 of the sheet with conductor 20 is provided. The bonding layer 13 is bonded to the conductor-attached sheet 20 in a region other than the region facing the connection terminal portion 35. For example, the bonding layer 13 is bonded to the conductor-attached sheet 20 only in a region facing the pattern conductor 40.

  Next, a method for manufacturing the heat generating plate 10 using the intermediate member 99 obtained in this way will be described. First, as shown in FIG. 16, the metal wiring forming the connection portion 8 is arranged on or connected to the connection terminal portion 35 of the intermediate member 99. At this time, the bonding layer 13 covers the region where the connection terminal portion 35 of the sheet 20 with electric body is provided, but is not bonded to the region of the sheet 20 with electric body. Therefore, by turning the bonding layer 13, the metal wiring forming the connection portion 8 can be easily brought into contact with the connection terminal portion 35 of the intermediate member 99.

  Next, the glass plate 11 is laminated on the intermediate member 99 from the bonding layer 13 side, and the bonding layer 14 and the glass plate 12 are laminated in this order from the conductor-attached sheet 20 side. Thereafter, the heating plate 10 is manufactured by heating and pressurizing the laminate. In the intermediate member 99, the conductor 30 including the pattern conductor 40 is fixed on the base material 25. Further, the connection portion 8 is held between the connection terminal portion 35 and the bonding layer 13 in the intermediate member 99. Therefore, while being able to perform a lamination process and a heating-pressing process easily, the pattern conductor 40 of the sheet | seat 20 with an electric conductor, the connection terminal part 35, and the connection part 8 were positioned in this process. It is possible to effectively prevent deviation from the position.

  According to the present embodiment as described above, the heat generating plate 10 is manufactured using the intermediate member 99. The intermediate member 99 is used for the heat generating plate 10 that generates heat when a voltage is applied, and includes a base material 25 and a conductor-attached sheet 20 having a conductor 30 provided on the base material 25. And the bonding layer 13 laminated on the sheet with conductor 20 from the side facing the conductor 30. The conductor 30 has a pair of connection terminal portions 35 to which a voltage is applied, and a pattern conductor 40 including a linear conductor 41 that connects the connection terminal portions 35. The bonding layer 13 is laminated with the sheet 20 with conductor so as to cover both the connection terminal portion 35 and the pattern conductor 40, and is bonded to the sheet with conductor 20 in a region other than the region facing the connection terminal portion 35. Yes. Therefore, the patterned conductor 40 can be produced with a desired pattern with high accuracy. Further, the pattern conductor 40 is not easily displaced during heating and pressing. Further, the bonding layer 13 is not bonded to the conductor-attached sheet 20 in the portion where the connection terminal portion 35 is provided. Therefore, the connection terminal part 35 and the connection part 8 can be connected easily and reliably. From the above, the heating and pressing step can be carried out very easily and reliably.

  Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above-described embodiment are used for parts that can be configured in the same manner as in the above-described embodiment, and overlapping Description to be omitted is omitted.

  For example, you may provide the pattern conductor 40 of the sheet | seat 20 with a conductor on the surface at the side of the glass plate 12 instead of on the surface at the side of the glass plate 11 of the base material 25. FIG. Moreover, you may provide in the both surfaces of the glass plate 11 side of the base material 25, and the glass plate 12 side.

  Further, the intermediate member 99 may further include a release layer 27 provided between the base material 25 and the dark color layer 46 as shown in FIG. When the intermediate member 99 is used, the substrate 25 can be peeled from the intermediate member 99 after the glass plate 11 and the intermediate member 99 are joined. As the peeling layer 27, for example, an interfacial peeling type peeling layer, an interlayer peeling type peeling layer, a cohesive peeling type peeling layer, or the like can be used. As the interfacial peeling type peeling layer, a peeling layer having relatively low adhesion to the bonding layer 13 and the patterned conductor 40 as compared with the adhesion to the substrate 25 can be suitably used. Examples of such a layer include a silicone resin layer, a fluororesin layer, and a polyolefin resin layer. In addition, it is possible to use a release layer that has relatively low adhesion to the base material 25 as compared with adhesion to the bonding layer 13 and the patterned conductor 40. The delamination type includes a multi-layer film, and the delamination layer has relatively low inter-laminar adhesion compared to the bonding layer 13 and the patterned conductor 40 and the substrate 25. Can be illustrated. Examples of the cohesive release type include a release layer in which a filler as a dispersed phase is dispersed in a base resin as a continuous phase.

  When the intermediate member 99 having the release layer 27 is used, the heat generating plate can be manufactured as follows. First, as shown in FIG. 18, the base material 25 of the sheet with conductor 20 is peeled off from the intermediate member 99 using the release layer 42 and removed from the intermediate member 99. When an interfacial peeling type peeling layer having a layer having relatively low adhesion to the bonding layer 13 and the patterned conductor 40 as compared to the adhesion to the substrate 25 is used as the peeling layer 27, the peeling layer 27 is used. And the bonding layer 13 and the pattern conductor 40 are peeled off. In this case, it is possible to prevent the release layer 27 from remaining on the bonding layer 13 and the patterned conductor 40 side. That is, the base material 25 is removed from the intermediate member 99 together with the release layer 27. In the intermediate member 99 from which the substrate 25 and the release layer 27 are removed in this way, the bonding layer 13 is exposed between the linear conductors 41 of the pattern conductor 40. Next, the heating plate 10 shown in FIG. 19 is manufactured by bonding the glass plate 12 to the exposed bonding layer 13. The heat generating plate 10 shown in FIG. 19 does not include the base material 25. Therefore, the heat generated by the conductor 30 is transmitted to the glass plate 12 more efficiently.

  On the other hand, as an exfoliation layer 27, when using an interfacial exfoliation type exfoliation layer whose adhesion with substrate 25 is relatively low compared with adhesion with junction layer 13 and pattern conductor 40, Peeling occurs between the release layer 27 and the substrate 25. As the release layer 27, an interlayer release type having a plurality of layers of films and having relatively low adhesion between the plurality of layers compared to the adhesion with the bonding layer 13 and the patterned conductor 40 and the substrate 25. When a release layer is used, peeling occurs between the plurality of layers. In the case where an agglomerated exfoliation type release layer in which a filler as a dispersed phase is dispersed in a base resin as a continuous phase is used as the exfoliation layer 27, exfoliation occurs due to cohesive failure in the exfoliation layer 27. Thereafter, the heating plate 10 is manufactured by bonding the glass plate 12 from the release layer 27 side using the bonding layer 14.

  The heat generating plate 10 may be used for a rear window, a side window, or a sunroof of the automobile 1. Moreover, you may use for windows of vehicles other than a motor vehicle, such as a railway, an aircraft, a ship, and a spacecraft.

  Furthermore, the heat generating plate 10 can be used not only for a vehicle but also for a part that divides a room and an outdoor area, such as a building, a store, a house window, and the like.

  In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

DESCRIPTION OF SYMBOLS 1 Automobile 5 Front window 7 Power supply 8 Connection part 10 Heat generating plate 11 Glass plate 12 Glass plate 13 Joining layer 14 Joining layer 20 Sheet 25 with a conductor 27 Base material 27 Peeling layer 30 Conductor 35 Connection terminal part 40 Pattern conductor 41 Linear Conductor 42 Branch point 43 Opening 45 Conductive metal layer 46 First dark color layer 47 Second dark color layer 48 Resist layer 49 Resist pattern 99 Intermediate member

Claims (2)

An intermediate member used for a heating plate that generates heat when a voltage is applied,
A sheet with a conductor having a substrate and a conductor provided on the substrate;
A bonding layer laminated on the sheet with the conductor from the side facing the conductor,
The conductor has a pair of connection terminal portions to which a voltage is applied, and a pattern conductor including a linear conductor that connects the pair of connection terminal portions,
The bonding layer is laminated with the conductor-attached sheet so as to cover both the connection terminal portion and the pattern conductor,
An intermediate member for a heating plate, which is joined to the sheet with a conductor in a region other than a region facing the connection terminal portion.   The intermediate member for a heat generating plate according to claim 1, wherein the bonding layer is bonded to a sheet with a conductor in a region facing the pattern conductor.

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