JPH02177601A - Window glass for automobile - Google Patents

Abstract

PURPOSE:To obtain a satisfactory gain characteristic as a glass antenna as well while the incidence of a heat ray into an automobile is blocked by forming a heat ray reflection film with the thin film of a high resistance value. CONSTITUTION:In order to prevent an antenna conductor 4 shields a radio wave to be received or a radio wave to be transmitted for a heat ray reflection film 5, as a heat ray reflection film 5, the heat ray reflection film, whose seat resistance value is >=20kOMEGA/square is used. When the heat ray reflection film 5 and antenna conductor 4 are in a non-contact state, the >=20kOMEGA/square resistance value is enough for the heat ray reflection film 5. On the other hand, when the heat ray reflection film 5 and antenna conductor 4 are in a contact state, besides erasing electro-magnetic shield performance, in order to prevent an electro-magnetic wave to be received by an antenna is diffused by the heat ray reflection film 5 and attenuated, it is preferable to set the seat resistance of the heat ray reflection film 5 to be >=1MOMEGA/square. Thus, the gain characteristic of the antenna conductor can be prevented from being lowered by the influence of the heat ray reflection film.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to automobile window glass, and more specifically,
This invention relates to an automobile window glass that has a glass surface that has a heat ray reflection function and an antenna function.

[Prior Art] In recent years, automobiles have tended to be equipped with various transmitting and receiving devices such as television receivers and wireless telephones in addition to radio receivers for AM and FM broadcasting. Window glass antennas are used in which antennas for one or more transmitters and receivers are formed on the surface of a window glass.

In this case, the antenna conductor for the window glass antenna is usually a printed antenna conductor made by printing silver paste on the glass surface and baking it, or a wire antenna conductor made by wiring thin conductive metal wires such as copper wire. A film antenna conductor formed with a transparent conductive film is often used.

On the other hand, recently, there has been a tendency for car window glass plates to be made thicker, which can cause heat rays (infrared rays) such as direct sunlight to enter through the window surface and cause an increase in the temperature inside the car. In order to alleviate these inconveniences even a little, a heat ray reflective coating is applied to the window glass plate using a metal thin film such as Ag, PT, Al or Cr, which has a high heat ray reflective performance. A method of suppressing the inflow of heat rays into the interior of a car has been proposed and is used in some vehicles.Such metal thin films have a high reflectance of visible light, resulting in a decrease in visible light transmittance and a feeling of glare. Therefore, an anti-reflection film is actually used.For example, a metal thin film of ZnO, 5no2.Ti0
Sandwich-like with metal oxides such as z+BLOs.

It is used in a form that utilizes interference to reduce reflections from thin metal films and improves durability.

[Problem to be solved by the invention] By the way, when a metal thin film such as an Ag-based film is used as a heat ray reflecting film, it itself has conductivity, and the sheet resistance value is about several Ω/RO to 1OΩ/RO. Therefore, it has high electromagnetic shielding properties.

On the other hand, since the radio waves transmitted and received by the above-mentioned window glass antenna are electromagnetic waves, if the above-mentioned metal thin film-based heat ray reflection film is applied near the glass antenna, the window glass antenna will be protected by the heat ray reflection film with high electromagnetic shielding properties. Since the radio waves to be received by the glass antenna are blocked, there is a problem in that, for example, the gain characteristics when receiving radio waves are degraded, making it impossible to obtain the necessary and sufficient gain.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems of the prior art, which were encountered when attempting to provide a window glass surface with a heat ray reflecting function and an antenna function at the same time. The structural feature is an automobile window glass provided with a heat ray reflective film and an antenna conductor, the heat ray reflective film having a diameter of 20 mm.
An automobile window glass characterized by having a sheet resistance value of KΩ/□ or more.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a front view showing an example of a window glass 1 of the present invention in which a heat ray reflecting film 5 and an antenna conductor 4 are provided on a glass plate for a rear window of an automobile. This window glass plate is composed of laminated glass as shown in FIG. 4, for example, and a conductive silver paste is printed on the upper part of the indoor side of the glass plate 3 on the indoor side of this laminated glass, and this is baked. This is an example in which an antenna conductor 4 is formed as a printed antenna, and a heat ray reflective film 5 is formed on the entire surface of the glass 2 on the outdoor side of the laminated glass except for the peripheral area of the indoor side surface. The antenna conductor 4 is configured to be able to feed power via a feed point 7 .

The window glass 1 provided with the heat ray reflective film 5 and the antenna conductor 4 is constructed by laminating and bonding two glass plates or two or more glass plates with a laminating interlayer film 6 such as a polyvinyl butyral film. layered laminated glass,
Alternatively, in addition to laminated glass in which a tear-resistant plastic film is bonded to the interior side of a glass plate, single-pane glass with a single-layer structure can also be used.

Also, regarding the arrangement of the heat ray reflective film 5 and the antenna conductor 4,
Various arrangements are adopted, such as those shown in enlarged cross-sectional views of main parts as examples in FIGS. 4 to 11.

In the present invention, in order to prevent the heat ray reflection film 5 from blocking radio waves to be received or transmitted by the antenna conductor 4, the heat ray reflection film 5 has a sheet resistance value of 20KΩ.
It is characterized by the use of a heat ray reflective film of /□ or more. When the heat ray reflection film 5 and the antenna conductor 4 are in a non-contact state as shown in FIGS. 4 to 7, for example, the heat ray reflection film 5 has a resistance of 20KΩ.
/□ or more, the above purpose can be achieved, and the antenna conductor 4
This is preferable because it does not require deterioration of the function of the . Especially 50KΩ
/□ or more is more preferable. On the other hand, when the heat ray reflection film 5 and the antenna conductor 4 are in contact as shown in FIGS. In order to prevent attenuation, a higher resistance is required, and the sheet resistance of the heat ray reflective film 5 is preferably 500KΩ/□ or more, preferably 1M07 or more.

The frequency of radio waves to be received and transmitted differs depending on the purpose of FM, AM, TV, television, telephone, etc., and correspondingly there is a lower limit to the sheet resistance value of the heat ray reflective film, but if the value is as above, these Sufficient for any purpose.

The heat ray reflective film 5 in the present invention must be formed of a thin film with a high resistance value in order to eliminate electromagnetic shielding properties (and to prevent electromagnetic wave diffusion, for example, titanium nitride, chromium nitride, zirconium nitride, etc.). or carbides such as chromium carbide, tantalum carbide, titanium carbide, and zirconium carbide, or borides such as zirconium boride, or absorbent oxides such as titanium oxide and chromium oxide, or silicides, or at least 2
Composite compounds containing seeds have a higher resistivity than conventional metals such as Ag (20KΩ/□ if an appropriate film thickness is selected).
It is possible to obtain sheet resistance values of It is preferable because a sheet resistance value of 20 KΩ/□ or more can be obtained in terms of film thickness, and the heat ray reflection function is sufficiently exhibited, and it is particularly suitable for use in a heat ray reflection film provided in a non-contact state with the antenna conductor.

Also, CrNx0y, TiNx0y, TiNxCy,
Ti0xCy.

Nitoxides, nitride carbides, oxycarbides, nitborides, nitsilicides, etc. such as CrNxBy and CrNx5iy have a slightly inferior heat ray reflection function compared to nitrides, but because of their high specific resistance, 5
Since it is easy to obtain a sheet resistance value of 0.00 Ω/hole, it is particularly suitable for use in a heat ray reflecting film provided in contact with an antenna conductor. Since these materials have low absorption of visible light, it is possible to increase the film thickness and obtain sufficient heat ray reflection performance while maintaining a high Tv. Even if the film thickness is increased,
It is a material with a high specific resistance such that a sheet resistance of 00KΩ/□ or more can be obtained.

As the heat ray reflection film 5 of the present invention, the above-mentioned heat ray reflection function film may be used as a single layer, or in order to improve the adhesion between the heat ray reflection function film and glass, a metal oxide dielectric film, a metal oxide dielectric film,
For example, a heat ray reflective film consisting of at least two layers with Tie, SiO This is particularly preferable as a heat ray reflecting film provided on the innermost side of the window glass), or by combining a heat ray reflecting film with a metal oxide dielectric film having a relatively high refractive index and utilizing interference to obtain desired optical properties. A heat ray reflective film consisting of at least two layers, such as glass/TaJs/CrNx0y/Ta1l
s l Glass/ZnO/ TiNx0y/ ZnO,
Glass/TxOz/TtN/TiO* etc. can be used.

In the case of a multilayer heat ray reflective film, the sheet resistance value as a whole should be 20 KΩ/□ or more, or 500 KΩ/□ or more when in contact with an antenna conductor. If the protective film, base film, etc. other than the heat ray reflective film are made of dielectric material and have almost no conductivity, the sheet resistance of the heat ray reflective film will essentially determine the sheet resistance of the entire multilayer heat ray reflective film. I will do it. Even if the underlying film is an insulator,
If the thickness of the base film is as thin as several tens of micrometers or less, there will be the same effect as when the heat ray reflection function film is in direct contact with the antenna conductor 4. The heat ray reflective film preferably has a sheet resistance value of 500KΩ/□ or more, particularly 1M07 or more.

The protective film provided on the air-side outermost layer on the above-mentioned heat ray reflective film to improve durability is tantalum oxide (Ta).
xes), Zr, Ti, If,
An amorphous film or the like made of an oxide containing at least one of Sn, Ta, and In (abbreviated as M) and at least one of B and Si has a smooth surface because it is amorphous. It is preferable because it has excellent scratch resistance and at the same time excellent chemical stability. M BxOy, M 5iz
Oy, M In BxSizOy, B or SL
Or, if the total amount is 0.05 or more per M1 atom, the film becomes amorphous. Also, if there is too much B or SL, chemical durability, that is, acid resistance, alkali resistance, moisture resistance, etc., tends to decrease. Considering these, the atomic ratio x of B to M in the film, M of SL Atomic ratio Z, 0(
The atomic ratio of oxygen) to M is 0.05≦X≦3.2<y≦6.5 for M BxOy, and M 5iz
For Oy, 0.05≦Z<19, 2.1≦y<40
and for M BxSizOy, 0.05≦x
It is preferable that +z<19.2<y<40 (excluding compositions where x+z-3>0 and x-3z+l>O). (As mentioned above, this is because B20° is hygroscopic and absorbs moisture in the air and dissolves.
This is because it is better not to contain too much in the film. Specifically, in the film, MOt < 25 mo1% and 5iOz < 25 mo1%, and the remainder is 820. B20. If it contains, chemical durability will be insufficient. That is, Zr:B:Si(
If the atomic ratio) is 1:x:z, then 1/ (1+x+z)
<0.25 and Z/(1+x+z) <0.25, that is, x+z-3>0x-3z+1>O has an unfavorable chemical durability) These films have a composition ratio of B or SL of As the refractive index increases, the refractive index decreases, so there is also the advantage that there is a high degree of freedom in optical design by appropriately changing the composition ratio.

In addition, when the heat ray reflective film 5 is formed in contact with the interlayer film as shown in Figs. 4 to 7.11, the adhesive force between the glass plate 2 or 3 and the interlayer film 6 may exceed the required level due to changes over time. This may cause problems such as a decrease in the penetration resistance of the entire laminated glass, a decrease in adhesive strength, or a change in the transmittance of the heat ray reflective film. In this case, a heat ray reflective film and
It is preferable that the heat ray reflective film 5 is composed of at least two layers: the film and an intervening layer interposed between the intermediate film.

On the other hand, the antenna conductor 4 may be a printed antenna formed by printing and baking silver paste or the like on the glass plate constituting the window glass 1, for example, as shown in Figs. For wire antennas formed by wiring thin conductive metal wires such as copper wires, as shown in Figure 7, and film antennas formed with transparent conductive films as shown in Figure 7, the desired specifications, relationship with gain, etc. It is possible to use a pattern formed under an appropriate pattern selected in .

In the present invention, it is preferable that the heat ray reflective film 5 is formed on at least the area other than the peripheral area of the window glass. This is because when a heat ray reflective film is formed all over the window glass, including the periphery, the capacitance between the heat ray reflective film 5 and the vehicle body increases, increasing the shielding effect, which significantly reduces the gain of the antenna in the medium wave band. This is because it will decrease. As shown in FIGS. 4 and 8, the width of the peripheral area where the heat ray reflective film 5 is not formed is the distance a from the tip of the vehicle body 10 to the end E of the heat ray reflective film 5.
is preferably 5 mm or more6 (4th
Figures 1 and 8 show the automobile window glass 1 of the present invention being fixed to a vehicle body 10 with an adhesive 11. The dam rubber 14 is used to dam the adhesive 11. ) Also, in the case of a structure in which the antenna conductor 4 is formed on the surface of the window glass closest to the vehicle side, and the heat ray reflecting film 5 is formed on the entire surface except for the peripheral part, as shown in FIGS. 8 to 10, If a part of the antenna conductor 4 is arranged so as to extend to the part where the heat ray reflective film 5 is not formed, the feeding point 7 is provided at the exposed part as shown in FIGS. Terminals can be formed, and a window glass with an excellent appearance when viewed from the outside of the vehicle can be provided.

Further, in the present invention, it is preferable that an insulating light-shielding colored layer 8 is formed in the peripheral portion as shown in FIGS. 2 to 11. In this way, the feeding point 7 of the antenna conductor 4 and the end E of the heat ray reflective film 5 are viewed from the outside of the vehicle, and the light-shielding colored layer 8
It can now be placed on the back side of the vehicle, giving it a very nice appearance from the outside of the vehicle.

The light-shielding colored layer 8 is preferably a ceramic color ink or the like, and usually contains pigments for developing a desired color,
It is generally composed of a low melting point glass frit for adhering to a glass plate to form a coating film, various refractory fillers, a screen printing solvent, etc., but is not particularly limited.

The light-shielding colored layer 8 extends from the edge of the window glass 1 to the end of the interior material 12 provided around the window glass and the window glass of the light-shielding colored layer 8, as shown in FIGS. 4 and 8. From the viewpoint of appearance, it is preferable that the distance from the end closer to the center be within 10 mm.

In the present invention, as shown in FIG. 3, a defogger print 9 for heating for the purpose of melting snow and preventing fogging may be provided.

4 to 7 show examples in which the automobile window glass according to the present invention is applied to laminated glass. Of these, FIG. 5 shows a laminated glass for a rear window of an automobile in which a heat ray reflecting film 5 is formed on the bonding surface of the inner glass 3 located on the inside of the vehicle with the laminated interlayer film, and the inner glass 3 is located on the inside of the vehicle. Antenna conductor 4 made of the printed antenna is formed on the exposed surface, and this inner glass plate 3 and another outer glass plate 2 are bonded via a plastic bonding interlayer 6 such as polyvinyl butyral. An example is shown.

FIG. 6 shows that a heat ray reflecting film 5 is formed on the bonding surface side of the outer glass plate 2, an antenna conductor 4 consisting of a wire antenna is formed on the bonding surface side of the inner glass plate 3, and a plastic interlayer film 6 is formed. An example will be shown in which they are connected to each other via. Furthermore, in FIG. 7, a heat ray reflecting film 5 is formed on the bonding surface side of the outer glass 2, an antenna conductor 4 consisting of a film antenna is formed on the bonding surface side of the inner glass plate 3, and a plastic interlayer film 6 is formed. An example will be shown in which they are connected to each other via.

Further, FIG. 11 shows a case where an antenna conductor 4 consisting of a printed antenna is formed on the inside of the vehicle of the outer glass 2, a heat ray reflecting film 5 is formed thereon, and the antenna conductor 4 is bonded to the inner glass 3 via a plastic interlayer film 6. An example is shown below.

When a heat ray reflective film is sealed inside the laminated glass as described above, since the heat ray reflective film is not exposed, deterioration of the heat ray reflective film can be prevented, thereby providing glass with excellent durability. Can be done.

Alternatively, as shown in FIGS. 9 and 10, an antenna conductor 4 consisting of a printed antenna and a heat ray reflecting film 5 may be formed on the inside of the inner glass 3 on the inside of the vehicle, and then bonded to the outer glass 2 via a plastic intermediate film 6. can.

In the laminated window glass shown in FIGS. 4 to 7 and 9 to 11, a part of the plastic interlayer film 6 may be provided with a colored portion or a gradation whose color changes stepwise, if desired. Furthermore, a plastic film containing a material that absorbs or reflects ultraviolet rays can be used as the intermediate film 6, which can prevent people inside the car from getting sunburn and can also prevent discoloration of interior materials inside the car.

FIG. 8 shows an example of a single-pane window glass in which an antenna conductor 4 consisting of a printed antenna and a heat ray reflecting film 5 are formed on the inside of the car of the - pane of glass 13.

A single-pane window glass as shown in FIG. 8 has the advantage that the material cost and manufacturing cost are low, and the weight can be reduced, compared to other laminated glass windows.

Note that the positional relationship between the heat ray reflective film 5 formed on the surface of the window glass 1 and the antenna conductor 4 is not limited to that in the above embodiment (but may be changed arbitrarily by exchanging the positions of the two). The heat ray reflecting film 5 can be selected and adopted in an appropriate positional relationship.Incidentally, placing the heat ray reflecting film 5 on the outer side of the glass plate as much as possible can more effectively prevent the temperature rise of the glass plate. , there is also the advantage that the outflow of heat from the outside of the car is increased.

Hereinafter, regarding the method for manufacturing an automobile window glass of the present invention,
explain.

For example, a typical manufacturing method for the window glass l shown in FIG. 8 is as follows: (1) A light-shielding colored layer 8 is printed on the periphery of the glass plate 13 by screen printing or the like, and then dried.

■ Print Ag paste etc. for antenna conductor 4 using screen printing etc. and dry it. (If desired, a defogger print may be printed at the same time as the antenna conductor 4.) (2) The glass plate 13 is heated to 600° C. or higher and bent, and at the same time the light-shielding colored layer and the antenna conductor are baked. (If desired, it may be strengthened by quenching after bending.) ■ 20K with the surrounding area masked with a masking member such as a metal frame or tape.
A heat ray reflective film having a sheet resistance value of Ω/□ or more is formed.

■ Remove the masking member.

This process is mentioned. If a curved window glass is not required, in step (1), it is sufficient to simply bake the light-shielding colored layer printed with (2) and (2), the antenna conductor, etc. can be omitted. Further, after step (1), a step of attaching the terminal with solder or the like may be added.

As a typical manufacturing method of the laminated glass type window glass 1 of the present invention, for example, in the case shown in FIG. 9, after the above ■-■, The outer glass 2 is stacked on the surface opposite to the surface on which 8 is formed and subjected to bending. After ■-■, the inner glass 3 and the outer glass 2 are laminated with an interlayer film 6 interposed therebetween and laminated. Take the process of doing it. The order may be ■→■→■. In the case shown in FIGS. 11 and 7, the inner glass 3 is stacked from below with the surface of the outer glass 2 on which the antenna conductor 4 and the light-shielding colored layer 8 are formed facing up. It is also possible to manufacture the glass by bending, and after steps (1) and (2), the inner glass 3 and the outer glass 2 are laminated as shown in the figure, and the bonding process (2) is performed. If you do this,
There is no need to pre-sinter the light-shielding colored layer 8 before bending the antenna conductor 4 etc. (the manufacturing process is simplified).

If the light-shielding colored layer 8 and the antenna conductor 4 are not formed together on one surface of one glass as shown in Figures 4.5 and 6.10, one of them will be laminated with the other glass during bending. Since it will be formed on the surface, it is pre-baked at about 500℃ before laminating in this way to prevent the light-shielding colored layer printed by screen printing etc. from fusing to the other glass during bending. It is necessary to do so, which increases manufacturing costs.

The above describes the process of forming a heat ray reflective film (■) after performing the bending process (■), but after drying in (■), the light-shielding colored layer 8, the antenna conductor 4, etc. are pre-baked, and then the heat ray reflective film is formed in (2). It is also possible to perform the bending process (■) after that.

Also, as shown in FIGS. 9 and 10, when forming the heat ray reflective film 5 on the inner side surface of the inner glass 3 of the laminated glass, ■→■-
As shown in ■°-■-■-■, it is also possible to form a film after laminating and vitrifying. In this way, after the bending process of the usual integrated laminated glass production line of glass plate cutting → bending process → laminating process, the process of taking it out midway, forming the heat ray reflective film 5, and returning it to the line for laminating process is avoided. This has the advantage that it is not necessary and the manufacturing cost is low.

Furthermore, in the above, we have explained in detail the method of bending by stacking at least two glass sheets and simultaneously bending them when manufacturing laminated glass type window glass. Of course, a method of performing matching processing is also possible.

In addition, when forming the heat ray reflective film 5 on one surface of the glass plate constituting the glass 1, the spacing method, CVD method, CLD method, etc.
In addition to directly forming the film on the surface of the glass plate using an appropriate film forming method such as the method, it may also be performed by separately forming a heat ray reflective film on the surface of a plastic film that is adhered to or sandwiched between the glass plates.

Since the present invention is configured in this manner, even if the heat ray reflective film 5 is disposed to cover the antenna conductor 4 provided on one side of the glass 1, the heat ray reflective film 5
Since the antenna conductor itself is formed of a non-conductive thin film with a high resistance value, the electromagnetic shielding property is eliminated, and the gain property of the antenna conductor 4 is not impaired. Therefore, it is possible to effectively function as designed as a glass antenna for various transmitting/receiving devices mounted on an automobile. In addition, since the glass surface is covered with a heat ray reflecting film 5, it is possible to effectively prevent heat rays such as direct sunlight from entering the inside of the car and increase the temperature inside the car, thereby reducing the cooling load. It is possible to effectively contribute to improving the interior environment of the vehicle while taking energy-saving measures.

Next, in order to confirm the specific effects of the present invention, we conducted a test together with a comparative example, and the results shown below were obtained. I was able to obtain the characteristics.

In Table 1, in Example 1, a TiNx single layer (20
1000 KHz, 80.200.40
The results are shown measured at 0 MHz.

Example 2 similarly uses TiO□/TiNx/Ti as the heat ray reflective film 5 in a window glass having the configuration as shown in FIG.
e, (20 Ω/hole), the comparative example is a window glass having the configuration as shown in FIG. This is comparative data for cases in which no heat ray reflective film is formed. Further, in Example 3, in the window glass having the configuration shown in FIG.
Comparison data is shown when a single layer of 0y (1M07) is formed and when no heat ray reflective film is formed.

As is clear from the above test results, according to the present invention, a heat ray reflective film can be formed on a glass surface without deteriorating antenna gain characteristics.

[Effects of the Invention] As described above, according to the present invention, since the heat ray reflective film is formed of a thin film with a high resistance value, it is possible to eliminate electromagnetic shielding properties. It is possible to prevent the gain characteristics of the antenna conductor from deteriorating, prevent hot rays from entering the vehicle interior, and exhibit excellent gain characteristics even as a glass antenna.

[Brief explanation of the drawing]

1 to 3 are front views of an example of the automobile window glass of the present invention, and FIGS. 4 to 11 are enlarged sectional views of essential parts taken along the line AA in FIG. 2. 1... Automotive window glass of the present invention, 2... Outer plate glass, 3... Inner plate glass, 4...
...Antenna conductor, 5. Heat ray reflective film, 6. Plastic interlayer film, 7. Feeding point, 8. Light-shielding colored layer 9. Defogger print, 10. Vehicle body, 11...Adhesive, 12...Interior material, 13...Glass, 14...Dam rubber

Claims (1)

[Claims] 1. An automotive window glass provided with a heat ray reflective film and an antenna conductor, wherein the heat ray reflective film has a sheet resistance value of 20KΩ/□ or more. window glass. 2. The automobile window glass according to claim 1, wherein the heat ray reflecting film is provided on the outer side of the vehicle than the antenna conductor. 3. The automobile window glass according to claim 1, wherein the heat ray reflecting film is provided closer to the inside of the vehicle than the antenna conductor. 4. The heat ray reflective film is in a non-contact state with the antenna conductor,
The automobile window glass according to claim 1, having a sheet resistance value of 20 KΩ/□ or more. 5. The heat ray reflective film is in contact with the antenna conductor;
The automobile window glass according to claim 1, having a sheet resistance value of 00KΩ/□ or more. 6. The automobile window glass according to any one of claims 1 to 5, wherein the heat ray reflective film has a heat ray reflective functional film made of metal nitride. 7. The heat ray reflective film is made of nitride, boride, carbide, oxide,
6. The automobile window glass according to claim 5, further comprising a heat ray reflecting film made of a composite compound containing two or more types of silicides. 8. A heat ray reflective film is provided on the innermost surface of the window glass, and the heat ray reflective film has at least two layers: a heat ray reflective functional film and a protective film provided as the outermost layer on the air side. The automobile window glass according to any one of claims 3 to 7, characterized by: 9. The automobile window glass according to any one of claims 1 to 8, wherein the heat ray reflecting film is formed on an area other than the peripheral area of the window glass. 10. The automobile window glass according to any one of claims 1 to 10, wherein a light-shielding colored layer is formed on the periphery of the window glass. 11. A heat ray reflective film is formed on the entire surface of the window glass except for the peripheral area, and the edge of the heat ray reflective film is positioned on the back side of the light-shielding colored layer when viewed from the outside of the vehicle. Claims 1-1 characterized in that a heat ray reflective film is formed.
11. The automobile window glass according to any one of item 11. 12. An antenna conductor is formed on the innermost surface of the window glass, and a heat ray reflective film is formed on the entire surface of the window glass except for the peripheral area, and a part of the antenna conductor is 12. The automotive window glass according to claim 3, wherein the window glass is exposed in a portion where no film is formed, and an antenna power feeding terminal is formed in the exposed portion. 13. A step of forming an antenna conductor on a glass plate, followed by a step of heating and bending, and then a step of forming a heat ray reflective film having a sheet resistance value of 20KΩ/□ or more with the peripheral portion masked. A method for manufacturing automotive window glass, characterized by: 14. The method for manufacturing a window glass for an automobile according to claim 13, further comprising the step of forming a light-shielding colored layer on the periphery of the glass plate before bending the glass plate. 15. A process of heating and bending the glass plate on which the antenna conductor was formed and the other glass plate, then using a hot wire having a sheet resistance value of 20KΩ/□ or more while masking the peripheral area of either glass plate. a step of forming a reflective film;
A method for producing a window glass for an automobile, which comprises the step of: then bonding the two glass plates together via a plastic interlayer film and subjecting them to a laminating process. 16. A step of heating and bending the glass plate on which the antenna conductor was formed and the other glass plate, then a step of joining the two glass plates via a plastic interlayer film, and then performing a laminating process. 2 with the peripheral area of the laminated glass masked.
A method for manufacturing an automobile window glass, comprising the step of forming a heat ray reflective film having a sheet resistance value of 0KΩ/□ or more.