JPH11142894A - Manufacture of conductive film for glare-proof mirror for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely insulate an EC film side transparent conductive film from a reflection film side transparent conductive film while using chemically reinforced glass as a transparent substrate. SOLUTION: A stiffening plate 21 for a jig 19 has a hollow part 21a, an endless ring-like part 21b and a projected part 21c. The plate 21 is fitted to a transparent substrate 11 so that the hollow part 2a faces from the upper surface 11a of the substrate 11 to its edge face 11b. In the state, a transparent conductive film is formed by coating the substrate 11. When the substrate 11 is detached from the jig 19, a ring-like insulating gap is formed from the upper surface 11a of the substrate 11 to the edge face 11b, so that the substrate 11 is formed in a shape separating a reflection film side transparent conductive film from an EC film side transparent conductive film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a conductive film for an anti-glare mirror for a vehicle, wherein an EC film-side transparent conductive film and a reflective film-side transparent conductive film are formed on a transparent substrate made of chemically strengthened glass. .

[0002]

Conventionally, as an anti-glare mirror for a vehicle, there is an anti-glare mirror configured as shown in FIG. An EC film-side transparent conductive film 2 is formed on a glass substrate 1 as a transparent substrate.
And the reflective film-side transparent conductive film 3 is formed with the insulating gap G, and the EC film 4 is formed on the EC film-side transparent conductive film 2. Then, a reflective film 5 is formed so as to be electrically connected to the transparent conductive film 3 on the reflective film side. A sealing resin 6 is adhered and formed on these upper surfaces, and a protective glass 7 is mounted. And the glass substrate 1
The EC film side transparent conductive film 2 and the reflection film side transparent conductive film 3
The EC side electrode 8 and the reflective film side electrode 9 are mounted so as to be electrically connected to each other. When a voltage is applied between the electrodes 8 and 9, the EC film 4 is colored in accordance with the applied voltage, and the reflectance is reduced to obtain an anti-glare state.

When the EC film-side transparent conductive film 2 and the reflection film-side transparent conductive film 3 are formed on the glass substrate 1, the following method has been adopted. That is, FIG.
As shown in (a), a transparent conductive film M made of, for example, an ITO film is formed on a glass substrate 1 larger than the final shape by vapor deposition or sputtering, and the glass substrate 1 is formed into a predetermined final shape. Then, FIG. 9B
As shown in FIG. 5, by removing the transparent conductive film M in a U-shape, for example, by laser cutting or etching, an insulating gap G exists between the EC film-side transparent conductive film 2 and the reflective film-side transparent conductive film 3. It is formed as follows. The insulating gap G is continuous up to the rib surface 1a of the glass substrate 1, so that the EC film-side transparent conductive film 2 and the reflective film-side transparent conductive film 3 are reliably insulated.

Incidentally, in the above-mentioned conventional technology, a glass substrate having a normal strength (float plate type glass) is used as the glass substrate.
However, recently, an attempt has been made to increase the strength of the anti-glare mirror, and specifically, it has been considered to configure the glass substrate 1 from a chemically strengthened glass substrate. In this case, when the glass substrate is subjected to the chemical strengthening treatment, it is necessary to perform the chemical strengthening treatment not only on the upper surface of the glass substrate but also on the face thereof. Therefore, the glass substrate is formed into a predetermined final shape, and then subjected to a chemical strengthening process, and then the EC film-side transparent conductive film and the reflective film-side transparent conductive film are deposited thereon.

In this case, as shown in FIG. 10, a transparent conductive film M made of an ITO film is formed by vapor deposition or sputtering on a glass substrate 1 'chemically reinforced in the final shape. In this case, the transparent conductive film M is deposited not only on the upper surface of the glass substrate 1 'but also on the face 1a' (note that the transparent conductive film M is not formed on the rear surface of the glass substrate 1 '. ing). Then, the transparent conductive film M on the upper surface of the glass substrate is removed in a U-shape to form an insulating gap G. However, the transparent conductive film M deposited on the face 1a 'is not removed, The film-side transparent conductive film and the reflective film-side transparent conductive film remain conductive. In this case, it is difficult to remove the transparent conductive film M on the face 1a 'by laser cutting or etching. Unless this point is solved, it is difficult to use chemically strengthened glass for the glass substrate, and as a result, the strength of the anti-glare mirror cannot be increased.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make sure that the EC film-side transparent conductive film and the reflective film-side transparent conductive film are formed while using a chemically strengthened glass as the transparent substrate. It is an object of the present invention to provide a method for manufacturing a conductive film for an antiglare mirror for a vehicle, which can be formed in an insulated state.

[0007]

According to a first aspect of the present invention, an EC film-side transparent conductive film is formed on a transparent substrate made of chemically strengthened glass, and the EC film-side transparent conductive film is insulated. Regarding the formation of the reflective film-side transparent conductive film in an island shape with a gap, the contact member having an endless annular portion is arranged such that the hollow portion of the endless annular portion corresponds from the rib surface to the upper surface of the transparent substrate. To the transparent substrate, and in this state, a transparent conductive film is formed on the transparent substrate, and then the contact member is removed, thereby forming the insulating gap, the EC film-side transparent conductive film and The feature is that the transparent conductive film on the reflection film side is formed separately.

According to the first aspect of the present invention, a contact member having an endless annular portion is applied to the transparent substrate such that the hollow portion of the endless annular portion corresponds from the rib surface to the upper surface of the transparent substrate. In this state, a transparent conductive film is formed on the transparent substrate, so that no transparent conductive film is formed on the transparent substrate on the back side of the contact member. The transparent conductive film is not formed on the rear surface of the transparent substrate. Thereafter, by removing the contact member, an annular insulating gap is formed from the upper surface of the transparent substrate to the rib surface, and the reflective film-side transparent conductive film is formed in an island shape in a portion surrounded by the annular insulating gap. And an EC film-side transparent conductive film is formed in a separated form in other portions. Therefore, it is possible to form the transparent conductive film on the EC film side and the transparent conductive film on the reflective film side surely in an insulated state while using the chemical strengthened glass as the transparent substrate. As a result, the antiglare mirror for a vehicle using the chemically strengthened glass can be put to practical use, and the strength of the antiglare mirror for a vehicle can be increased.

According to a second aspect of the present invention, an EC film-side transparent conductive film is formed on a transparent substrate made of chemical strengthened glass, and an insulating gap is formed between the EC film-side transparent conductive film. For forming the reflective film side transparent conductive film in an island shape, the protruding portion of the contact member having two protruding portions that are separated from each other is applied to the face of the transparent substrate, and the transparent conductive film is applied to the transparent substrate. Is formed, and thereafter, the non-applied portion where the transparent conductive film is not formed is formed on the contact surface of the contact surface by removing the application member, and the application portion is formed on the transparent substrate. By removing a portion of the transparent conductive film that connects the two non-deposited portions, the insulating gap is formed, and the EC film-side transparent conductive film and the reflective film are separately formed. To With a butterfly.

In the second aspect of the present invention, the projecting portion of the contact member having two projecting portions spaced apart from each other is applied to the face of the transparent substrate, and the transparent substrate is covered with a transparent conductive film. Since this is formed, no transparent conductive film is formed on the back side of the protruding portion of the contact member on the face of the transparent substrate. Thereafter, by removing the contact member, two non-adhered portions where the transparent conductive film is not present at the traces of detachment of the contact member on the face are formed.
In this state, the EC film-side transparent conductive film and the reflective film transparent conductive film are not yet formed separately on the upper surface of the transparent substrate.

Then, by removing the region connecting the two non-adhered portions of the transparent conductive film formed on the transparent substrate, a portion without the transparent conductive film is formed in an annular shape. That is, a configuration in which the insulating gap is formed in an annular shape, the reflective film-side transparent conductive film is formed in an island shape in a portion surrounded by the annular insulating gap, and the EC film-side transparent conductive film is separated in other portions. Formed. Therefore,
The transparent conductive film on the EC film side and the transparent conductive film on the reflective film side can be reliably formed in an insulated state while using a chemically strengthened glass as the transparent substrate.

According to a third aspect of the present invention, an EC film-side transparent conductive film is formed on a transparent substrate made of chemically strengthened glass, and an insulating gap is formed between the EC film-side transparent conductive film. For forming the reflective film-side transparent conductive film in an island shape, a contact member is applied to a part of the face of the transparent substrate, and in this state, a transparent conductive film is formed on the transparent substrate, and thereafter, By removing the contact member, a non-adhered portion where no transparent conductive film is formed at the contact member removal mark on the face is formed, and among the transparent conductive films adhered and formed on the transparent substrate, the non-coated portion is removed. It is characterized in that the insulating gap is formed and the first transparent conductive film and the second transparent conductive film are separately formed by removing a region connecting both ends of the attachment portion.

According to the third aspect of the present invention, a contact member is applied to a part of the face of the transparent substrate, and in this state,
Since the transparent conductive film is formed on the transparent substrate, no transparent conductive film is formed on the back side of the contact member on the front side of the transparent substrate. After that, by removing the contact member, one non-adhered portion where the transparent conductive film is not present at the trace of removing the contact member on the face side is formed. In this state, the EC film-side transparent conductive film and the reflective film transparent conductive film are not yet formed separately on the upper surface of the transparent substrate.

Thereafter, by removing a portion of the transparent conductive film formed on the transparent substrate that connects both ends of the non-coated portion, a portion without the transparent conductive film is formed in an annular shape. That is, a configuration in which the insulating gap is formed in an annular shape, the reflective film-side transparent conductive film is formed in an island shape in a portion surrounded by the annular insulating gap, and the EC film-side transparent conductive film is separated in other portions. Formed. Therefore, while using a structure that uses chemical strengthened glass as the transparent substrate,
The transparent conductive film on the EC film side and the transparent conductive film on the reflective film side can be reliably formed in an insulated state.

The invention according to claim 4 is characterized in that the contact member also serves as a fixing jig for fixing the transparent substrate. According to the fourth aspect of the present invention, since the transparent substrate is fixed using the contact member for forming the insulating gap, it is possible to contribute to the simplification of the configuration of the manufacturing equipment.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention (an embodiment according to the first aspect of the present invention) will be described below with reference to FIGS. FIG. 2 shows the vehicle anti-glare mirror 10 in a completed state. The transparent substrate 11 is made of a chemically strengthened glass. The transparent substrate 11 is a glass substrate formed in a predetermined final shape in advance by a chemical strengthening process. An EC film-side transparent conductive film 12 is formed on the transparent substrate 11, and a reflection film-side transparent conductive film 13 is formed on the EC film-side transparent conductive film 12 with an insulating gap Ga. An EC film 14 is formed by deposition and this EC
A reflection film 15 is formed on the film 14 so as to be electrically connected to the reflection film-side transparent conductive film 13.

On these upper surfaces, a sealing resin 16 is adhered and formed, and a protective glass 17 is mounted. An EC-side electrode 18 and a reflective-film-side electrode 19 are mounted on the transparent substrate 11 so as to be electrically connected to the EC-film-side transparent conductive film 12 and the reflective-film-side transparent conductive film 13. When a voltage is applied between the electrodes 18 and 19, the EC film 14 is colored in accordance with the applied voltage, and the reflectance is reduced to obtain an antiglare state.

A method for forming the EC film-side transparent conductive film 12 and the reflection film-side transparent conductive film 13 will now be described.
FIG. 1 shows a state where the transparent substrate 11 subjected to the chemical strengthening process is set on a jig 19. This jig 19
The receiving plate 20 is configured by attaching a contact plate 21 as a contact member in an upright state. A substantially rectangular hollow portion 21a is formed in the backing plate 21, and the backing plate 21 has an endless annular portion 21b. Further, the endless annular portion 21b is bent substantially horizontally from the middle of the hollow portion 21a. The protrusion is denoted by reference numeral 21c.

The transparent substrate 11 is disposed in a floating state on the receiving plate 20 via a receiving member (not shown). In this case, the transparent substrate 11 comes into contact with the contact plate 21 and is relatively hollow. The contact plate 2 is arranged such that the portions 21a correspond from the rib surface 11b to the upper surface 11a of the transparent substrate 11.
1 is applied to the transparent substrate 11.

Thereafter, a transparent conductive film Ma made of an ITO film is formed on the transparent substrate 11 by vapor deposition or sputtering. At this time, the transparent conductive film Ma is not formed on the portion of the transparent substrate 11 behind the backing plate 21.
The transparent conductive film Ma is not formed on the rear surface of the transparent substrate 11. Then, the transparent substrate 11 is removed from the jig 19 (relatively, the backing plate 21 is attached to the transparent substrate 1).
1). As a result, as shown in FIG. 3, an annular insulating gap Ga is formed from the upper surface 11a of the transparent substrate 11 to the rib surface 11b, and the light is reflected by the transparent conductive film Ma surrounded by the annular insulating gap Ga. The film-side transparent conductive film 13 is formed in an island shape, and the EC film-side transparent conductive film 12 is formed in a separated form in other portions.

As described above, in the present embodiment, the EC-side transparent conductive film 12 and the reflective film-side transparent conductive film 13 are formed while using the chemical strengthened glass for the transparent substrate 11.
Can be reliably insulated. Thereby, the antiglare mirror for a vehicle using the chemically strengthened glass can be put into practical use, and the strength of the antiglare mirror for a vehicle can be increased. In particular, according to the present embodiment, since the transparent conductive film Ma does not need to be subjected to the step of removing the transparent conductive film Ma by laser cutting or etching, the number of manufacturing steps can be reduced.

FIGS. 4 and 5 show a second embodiment of the present invention (an embodiment according to claims 2 and 4). The contact plate 31 serving as a contact member has a configuration in which two projecting pieces 31a are separated from each other, and the upper part of the projecting piece 31a is bent substantially horizontally. The contact member 31 relatively moves the protruding portion 31 a to the face 11 of the transparent substrate 11.
b, and further to the upper surface 11a. After this,
As in the case of the first embodiment, ITO is provided on the transparent substrate 11.
A transparent conductive film Ma made of a film is formed by deposition or sputtering. At this time, the transparent conductive film Ma is not formed on a portion of the transparent substrate 11 behind the backing plate 31. Then, the transparent substrate 11 is removed from the jig 19 (relatively, the backing plate 31 is removed from the transparent substrate 11).
Thereby, as shown in FIG. 5A, two non-adhered portions M0 are formed from the rib surface 11b to the upper surface 11a.

Thereafter, of the transparent conductive film Ma deposited on the transparent substrate 11, these two non-deposited portions M
By removing the region connecting 0 and M0 (represented by reference numeral Mr in FIG. 5A) by laser cutting or etching, a portion without the transparent conductive film Ma is formed in a ring shape, that is, the insulating gap is formed. Ga (see FIG. 5B) is formed in an annular shape, the reflective film-side transparent conductive film 13 is formed in an island shape in a portion surrounded by the annular insulating gap Ga, and the EC film-side transparent film is formed in other portions. The conductive film 12 is formed in a separated form. Therefore, while using the chemical strengthened glass for the transparent substrate 11, the EC film side transparent conductive film 1 is used.
2 and the reflective film-side transparent conductive film 13 can be reliably formed in an insulated state.

In this case, the contact plate 31 is connected to the transparent substrate 11.
By applying to both sides of this, the contact plate 31 can be used as a fixing jig by the pressing action of the protruding piece portion 31a. At this time, since the transparent conductive film 13 on the reflective film side only needs to be present on one side, the removal of the transparent conductive film Ma by laser cutting or etching may be performed on one side.

FIGS. 6 and 7 show a third embodiment of the present invention (an embodiment according to the third and fourth aspects of the present invention). The backing plate 41 serving as a backing member has a flat plate shape, and has a projecting piece 4 projecting horizontally on both sides of an upper end thereof.
1a and 41a are formed. This contact member 41
Relatively, it is applied to the rib surface 11b of the transparent substrate 11, and the protruding pieces 41a, 41a are applied to the upper surface 11a. Thereafter, as in the first embodiment, a transparent conductive film Ma made of an ITO film is formed on the transparent substrate 11 by vapor deposition or sputtering. At this time,
The transparent conductive film Ma is not formed on a portion of the transparent substrate 11 behind the backing plate 41. Then, the transparent substrate 11 is removed from the jig 19 (relatively, the backing plate 41 is removed from the transparent substrate 11). Thereby, as shown in FIG. 7A, one non-adhered portion M0 is formed on the rib surface 11b.

Thereafter, of the transparent conductive film Ma deposited on the transparent substrate 11, a region connecting both ends of the non-deposited portion M0 (FIG. 7 (a) is denoted by reference numeral Mr). ) Is removed by laser cutting or etching, so that a portion without the transparent conductive film Ma is formed in a ring shape, that is, an insulating gap Ga (see FIG. 7B) is formed in a ring shape. The transparent conductive film 13 on the reflection film side is formed in an island shape in a portion surrounded by the circle, and the transparent conductive film 12 on the EC film side is formed in a separated shape in other portions. In this embodiment, if the abutment plate 41 is applied to both sides of the transparent substrate 11, the abutment plate 41 can be used as a fixture by the pressing action of the projecting pieces 41a, 41a of the abutment plate 41. Things.

[0027]

As described above, according to the first to third aspects of the present invention, the transparent conductive film on the EC film side and the transparent conductive film on the reflective film side are surely formed while using the chemical strengthened glass as the transparent substrate. It can be formed in an insulated state. Thereby, the antiglare mirror for a vehicle using the chemically strengthened glass can be put into practical use, and the strength of the antiglare mirror for a vehicle can be increased. According to the fourth aspect of the present invention, since the transparent substrate is fixed using the contact member for forming the insulating gap, it is possible to contribute to the simplification of the configuration of the manufacturing equipment.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention and is a perspective view partially showing a state during manufacture.

FIG. 2 is a longitudinal sectional side view of an anti-glare mirror in a completed state.

FIG. 3 is a perspective view of another state during the manufacturing.

FIG. 4 is a view corresponding to FIG. 1, showing a second embodiment of the present invention;

FIG. 5 is a perspective view of a state in the middle of manufacturing.

FIG. 6 is a view corresponding to FIG. 1, showing a third embodiment of the present invention.

FIG. 7 is a perspective view of a state in the middle of manufacturing.

FIG. 8 is a diagram corresponding to FIG. 2 showing a conventional example.

FIG. 9 is a perspective view in the middle of manufacturing.

FIG. 10 is a perspective view showing a reference example in the case of using chemically strengthened glass, in a state of being manufactured.

[Explanation of symbols]

10 is an anti-glare mirror, 11 is a transparent substrate, 11a is a face,
12 is an EC film side transparent conductive film, 13 is a reflective film side transparent conductive film, 14 is an EC film, 15 is a reflective film, 17 is an EC side electrode,
18 is a reflection film side electrode, 19 is a jig, 21 is a contact plate (contact member), 21a is a hollow portion, 21b is an endless annular portion, Ga is a gap, 31 is a contact plate (contact member), and 31a is a projection. Reference numeral 41 denotes a backing plate (backing member), and 41a denotes a protruding piece.

Claims (4)

[Claims] 1. An EC film-side transparent conductive film is formed on a transparent substrate made of chemically strengthened glass, and a reflective film-side transparent conductive film is formed in a state where an insulating gap exists with respect to the EC film-side transparent conductive film. With respect to forming the film in an island shape, a contact member having an endless annular portion is applied to the transparent substrate so that the hollow portion of the endless annular portion corresponds from the rib surface to the upper surface of the transparent substrate, and in this state, By forming a transparent conductive film on this transparent substrate, and then removing the contact member, the insulating gap is formed, and the EC film-side transparent conductive film and the reflective film-side transparent conductive film are separately formed. A method for producing a conductive film for an anti-glare mirror for a vehicle, characterized in that: 2. An EC film-side transparent conductive film is formed on a transparent substrate made of chemically strengthened glass, and a reflective film-side transparent conductive film is formed in a state where an insulation gap exists between the EC film-side transparent conductive film. Regarding the formation of the film in an island shape, the protruding portion of a contact member having two protruding portions separated from each other is applied to the face of the transparent substrate, and a transparent conductive film is formed on the transparent substrate. After this, by removing the contact member, to form a non-adhered portion where there is no transparent conductive film in the contact member removal traces on the face side,
By removing a portion of the transparent conductive film formed on the transparent substrate that connects these two non-deposited portions, the insulating gap is formed, and the EC film-side transparent conductive film and the reflective film are formed. A method for producing a conductive film for an anti-glare mirror for a vehicle, wherein the film is formed separately. 3. An EC film-side transparent conductive film is formed on a transparent substrate made of chemically strengthened glass, and a reflective film-side transparent conductive film is formed in a state where an insulating gap exists with respect to the EC film-side transparent conductive film. Regarding the formation of the film in an island shape, a contact member is applied to a part of the face of the transparent substrate, and in this state, a transparent conductive film is formed on the transparent substrate, and then the contact member is removed. By forming a non-adhered portion where there is no transparent conductive film at the contact member removal traces on the face of the edge, of the transparent conductive film adhered and formed on the transparent substrate, both ends of the non-adhered portion The first transparent conductive film and the second transparent conductive film are formed separately by removing a region portion connecting the first and second transparent conductive films. Film manufacturing method. 4. The method for producing a conductive film of an anti-glare mirror for a vehicle according to claim 1, wherein the contact member also serves as a fixing jig for fixing the transparent substrate.