JP6922502B2 - Sensor film manufacturing method and sensor film - Google Patents

Description

The present invention relates to a sensor film manufacturing method and a sensor film, and more particularly to a sensor film manufacturing method and a sensor film capable of increasing the sensing effective area.

The touch sensor is mounted on, for example, a mobile terminal or the like, and is used to detect the position touched by the user.

Japanese Unexamined Patent Publication No. 2003-153128 Japanese Unexamined Patent Publication No. 3-38982

Since the touch sensor is often mounted on a relatively small device such as a mobile terminal, it has been mainly required to be miniaturized in the past.

On the other hand, the present inventor has tried to increase the area of the sensing area by increasing the size of the touch sensor. For example, a touch screen having both a screen function for projecting an image from a projector and a touch sensor function has been proposed, but if the sensing area can be increased, the area of the touch screen can be increased. ..

However, in order to increase the effective area for sensing by the touch sensor, it is necessary to increase the size of the manufacturing apparatus, which causes a problem that the equipment cost increases.

Patent Documents 1 and 2 propose a technique for increasing the area of a displayed image with respect to an image display device. However, regarding the touch sensor, a technique for increasing the effective sensing area has not been established.

Therefore, an object of the present invention is to provide a method for manufacturing a sensor film and a sensor film capable of increasing the effective sensing area.

Further, other problems of the present invention will be clarified by the following description.

The above problems are solved by the following inventions.

1. 1.
A plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film are prepared.
Next, a method for manufacturing a sensor film, which comprises connecting a plurality of the sensor film elements so as to expand the effective sensing area.
2.
Conductive so as to electrically connect the sensor channel constituting one of the sensor film elements and the sensor channel constituting the other sensor film element to the connection portion between the sensor film elements connected to each other. The method for manufacturing a sensor film according to 1 above, which comprises applying a member.
3. 3.
The film is rectangular, and at least two sensor film elements are prepared in which a plurality of the sensor channels parallel to the short side direction of the film are arranged side by side in the long side direction of the film.
Next, the positions of the two sensor film elements are adjusted so that the plurality of sensor channels included in the two sensor film elements face each other on a one-to-one basis.
Next, the sensor film according to 2. Manufacturing method.
4.
At least one of the two sensor film elements includes a conductor extending from the end of the sensor channel to the connection portion on the film, and the conductor has a structure different from that of the sensor channel. ,
3. The method for manufacturing a sensor film according to the above 3, wherein the sensor channels are electrically connected to each other by applying the conductive member onto the conductor.
5.
4. The method for manufacturing a sensor film according to 4, wherein the conductor is thinner than the channel width of the sensor channel.
6.
The average conductive material coverage of the conductor and the portion to which the conductive member is provided between the sensor channels electrically connected to each other is 10% to 10% of the average conductive material coverage of the portion where the sensor channel is formed. The method for producing a sensor film according to 4 or 5, wherein the range is 300%.
7.
A sheet composed of a support and a plurality of the conductive members arranged on the support at predetermined intervals is prepared.
Next, the sheet is superposed on the connection portion so that the plurality of sets of the sensor channels facing each other with the connection portion between the two sensor film elements are electrically connected by the plurality of conductive members. The method for producing a sensor film according to any one of 3 to 6 above.
8.
The film is rectangular, and at least two sensor film elements are prepared in which a plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film.
Next, the sensor film according to 1 above, wherein the long sides of the two sensor film elements are connected to each other so that the sensor channels included in the two sensor film elements are not electrically connected to each other. Production method.
9.
The film is rectangular, and a plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film, and the sensor closest to at least one long side of the film. The channel width of the channel is smaller than the average value of the channel widths of the other sensor channels. At least two sensor film elements are prepared.
Next, the two sensor film elements are positioned so that the sensor channels closest to the long side of each of the two sensor film elements are adjacent to each other.
Next, the method for manufacturing a sensor film according to the second aspect, wherein a conductive member is provided so as to electrically connect the sensor channels closest to the long side.
10.
The film is rectangular, and a plurality of the sensor channels parallel to the short side direction of the film are arranged side by side in the long side direction of the film on the front surface of the film, and the back surface of the film is covered with the sensor channels. At least two sensor film elements having a plurality of the sensor channels parallel to the long side direction of the film arranged side by side in the short side direction of the film are prepared.
Next, the two sensor film elements are positioned so that the plurality of sensor channels on the surface of each of the two sensor film elements face each other on a one-to-one basis.
Next, a conductive member is provided so as to electrically connect a plurality of sets of the sensor channels on the surface facing each other with the connection portion between the two sensor film elements interposed therebetween, and the two sensor films are provided. The method for manufacturing a sensor film according to 1, wherein the sensor channels on the back surface of each element are not electrically connected to each other.
11.
The film is rectangular, and a plurality of the sensor channels parallel to the short side direction of the film are arranged side by side in the long side direction of the film on the front surface of the film, and the back surface of the film is covered with the sensor channels. A plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film, and the channel width of the sensor channel on the back surface closest to at least one long side of the film is , At least two sensor film elements smaller than the average value of the channel widths of the other sensor channels on the back surface are prepared.
Next, the plurality of sensor channels on the front surface of each of the two sensor film elements face each other on a one-to-one basis, and the two sensor film elements each include the back surface of the back surface closest to the long side. The two sensor film elements are positioned so that the sensor channels are adjacent to each other.
Next, a conductive member is provided so as to electrically connect a plurality of sets of the sensor channels on the surface facing each other with the connection portion between the two sensor film elements interposed therebetween, and the closest to the long side. The method for manufacturing a sensor film according to the above 1, wherein a conductive member is provided so as to electrically connect the sensor channels on the back surface thereof.
12.
It is composed of a plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film.
A sensor film characterized in that a plurality of the sensor film elements are connected so as to expand the effective sensing area.
13.
Conductive so as to electrically connect the sensor channel constituting one of the sensor film elements and the sensor channel constituting the other sensor film element to the connection portion between the sensor film elements connected to each other. The sensor film according to the above 12, wherein a member is provided.
14.
The film is rectangular, and at least two sensor film elements are formed by arranging a plurality of the sensor channels parallel to the short side direction of the film in the long side direction of the film.
The positions of the two sensor film elements are adjusted so that the plurality of sensor channels included in the two sensor film elements face each other on a one-to-one basis.
13. The sensor film according to 13. ..
15.
At least one of the two sensor film elements includes a conductor extending from the end of the sensor channel to the connection portion on the film, and the conductor has a structure different from that of the sensor channel. ,
The sensor film according to 14.
16.
The sensor film according to 15, wherein the conductor is thinner than the channel width of the sensor channel.
17.
The average conductive material coverage of the conductor and the portion to which the conductive member is provided between the sensor channels electrically connected to each other is 10% to 10% of the average conductive material coverage of the portion where the sensor channel is formed. The sensor film according to 15 or 16, wherein the sensor film is in the range of 300%.
18
A sheet composed of a support and a plurality of the conductive members arranged at predetermined intervals on the support is superposed on the connection portion between the two sensor film elements.
Any of the above 14 to 17, wherein a plurality of sets of the sensor channels facing each other with a connection portion between the two sensor film elements are electrically connected to each other by the plurality of conductive members. The sensor film described in Crab.
19
The film is rectangular, and at least two sensor film elements are formed by arranging a plurality of the sensor channels parallel to the long side direction of the film in the short side direction of the film.
12. The sensor film according to the above 12, wherein the long sides of the two sensor film elements are connected so as not to electrically connect the sensor channels included in the two sensor film elements.
20.
The film is rectangular, and at least two sensor film elements are formed by arranging a plurality of the sensor channels parallel to the long side direction of the film in the short side direction of the film, and at least the film. The channel width of the sensor channel closest to one long side is smaller than the average value of the channel widths of the other sensor channels.
The two sensor film elements are positioned so that the sensor channels closest to the long side of each of the two sensor film elements are adjacent to each other.
The sensor film according to the thirteenth aspect, wherein a conductive member is provided so as to electrically connect the sensor channels closest to the long side.
21.
The film is rectangular, and at least two sensor film elements have a plurality of sensor channels parallel to the short side direction of the film arranged side by side in the long side direction of the film on the surface of the film. On the back surface of the film, a plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film.
The two sensor film elements are positioned so that the plurality of sensor channels on the surface of each of the two sensor film elements face each other on a one-to-one basis.
A conductive member is provided so as to electrically connect a plurality of sets of the sensor channels on the surface facing each other with the connection portion between the two sensor film elements interposed therebetween, and the two sensor films. The sensor film according to the above 12, wherein the sensor channels on the back surface of each element are not electrically connected to each other.
22.
The film is rectangular, and at least two sensor film elements have a plurality of sensor channels parallel to the short side direction of the film arranged side by side in the long side direction of the film on the surface of the film. On the back surface of the film, a plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film, and are closest to at least one long side of the film. The channel width of the sensor channel on the back surface is smaller than the average value of the channel widths of the sensor channels on the other back surface.
A plurality of the sensor channels on the front surface of each of the two sensor film elements face each other on a one-to-one basis, and each of the two sensor film elements includes the sensor channel on the back surface closest to the long side. The two sensor film elements are positioned so that they are adjacent to each other.
A conductive member is provided so as to electrically connect a plurality of sets of the sensor channels on the surface facing each other with the connection portion between the two sensor film elements interposed therebetween, and the closest to the long side. The sensor film according to the above 12, wherein a conductive member is provided so as to electrically connect the sensor channels on the back surface thereof.

According to the present invention, it is possible to provide a method for manufacturing a sensor film and a sensor film capable of increasing the effective sensing area.

The figure explaining an example of the sensor film element in 1st Embodiment The figure explaining an example of the position adjustment of the sensor film element in 1st Embodiment The figure explaining an example of the connection of the sensor film element in 1st Embodiment The figure explaining the short circuit prevention effect under the occurrence of misalignment The figure explaining an example of 2nd Embodiment The figure explaining another example of 2nd Embodiment The figure explaining an example of the sensor film element in 3rd Embodiment The figure explaining an example of the sensor film in 3rd Embodiment The figure explaining another example of the sensor film element in 3rd Embodiment The figure explaining another example of the sensor film in 3rd Embodiment A diagram illustrating an example of a sensor film formed by connecting a large number of sensor film elements. A diagram illustrating an example of a sensor channel composed of a pattern composed of a combination of a plurality of conductive thin lines forming a geometric figure. Diagram illustrating another example of a conductor The figure explaining an example of the conductive member supported by the support The figure explaining another example of the conductive member supported by a support The figure explaining another example of the conductive member supported by a support

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

In the present invention, a plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film are prepared, and then a plurality of the sensor film elements are provided so as to expand the sensing effective area. Connecting. As a result, the effective sensing area can be increased. Further, as compared with the case where a sensor film is manufactured by processing one large-area film, for example, it is not necessary to increase the size of the manufacturing apparatus, and it can be carried out by using an existing manufacturing apparatus. Therefore, it is possible to avoid the problem that the equipment cost increases.

1. 1. First Embodiment A method for manufacturing a sensor film according to the first embodiment will be described. In the present embodiment, a case where a plurality of sensor film elements are connected so as to be arranged side by side along the longitudinal direction of the sensor channel will be described. Here, as an example, a method of manufacturing a sensor film constituting a touch panel sensor will be illustrated.

First, as shown in FIG. 1, two sensor film elements 1 and 1 are prepared.

The sensor film element 1 is composed of a film 2 and a plurality of sensor channels 3 formed on the film 2.

〔the film〕
The material of the film 2 is not particularly limited, and for example, polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) resin, polybutylene terephthalate resin, cellulose-based resin (polyacetyl cellulose, cellulose diacetate, cellulose triacetate, etc.), polyethylene. Resin, polypropylene resin, methacrylic resin, cyclic polyolefin resin, polystyrene resin, acrylonitrile- (poly) styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyvinyl chloride Examples thereof include resins, poly (meth) acrylic resins, polycarbonate resins, polyester resins, polyimide resins, polyamide resins, polyamideimide resins, cycloolefin polymer (COP) resins and the like. By using these materials, good insulation and transparency can be imparted to the film. Further, particularly by using a synthetic resin material, good flexibility can be imparted to the film 2. The film made of the synthetic resin material may be stretched or unstretched.

The thickness of the film 2 is not particularly limited, and can be, for example, about 1 μm to 10 cm, and further about 20 μm to 300 μm.

The film 2 may be subjected to a surface treatment for changing the surface energy. Further, the film 2 may be a laminated body, and may have a hard coat layer, an antireflection layer, and the like.

In the present embodiment, the film 2 is rectangular and has a pair of long sides 21 and a pair of short sides 22 shorter than the long sides 21.

[Sensor channel]
In the present embodiment, the sensor channel 3 is an electrode for detecting touch in the touch panel sensor. The detection method of the touch panel sensor is not particularly limited, and examples thereof include a resistive film method, a capacitance method, and an optical sensor method.

The sensor channel 3 is formed of a conductive material in a strip shape having a predetermined width (also referred to as a channel width). The length and width of the sensor channel 3 are not particularly limited, and can be appropriately set according to the purpose, application, and the like.

The sensor channel 3 is composed of a plurality of conductive thin wires arranged in a mesh shape on the film 2.

The method for forming the conductive thin wire constituting the sensor channel 3 is not particularly limited, and can be formed by, for example, a printing method using an ink containing a conductive material. Examples of the printing method include an inkjet method and the like. The droplet ejection method of the inkjet head in the inkjet method is not particularly limited, and examples thereof include a piezo method and a thermal method.

The conductive material is not particularly limited, and examples thereof include metal fine particles, metal oxide fine particles, carbon fine particles, and a conductive polymer. Examples of the metal constituting the metal fine particles include Au, Pt, Ag, Cu, Ni, Cr, Rh, Pd, Zn, Co, Mo, Ru, W, Os, Ir, Fe, Mn, Ge, Sn, Ga, etc. In and the like can be mentioned. Among these, Au, Ag and Cu are preferable, and Ag is particularly preferable. The average particle size of the metal fine particles can be, for example, 1 to 100 nm, more preferably 3 to 50 nm. The average particle size is a volume average particle size and can be measured by "Zetasizer 1000HS" manufactured by Malvern. Examples of the metal oxide fine particles include indium tin oxide (ITO) and tin oxide. Examples of the carbon fine particles include graphite fine particles, carbon nanotubes, fullerenes and the like. The conductive polymer is not particularly limited, but a π-conjugated conductive polymer can be preferably mentioned. Examples of the π-conjugated conductive polymer include polythiophenes and polyanilines. The π-conjugated conductive polymer may be used together with a polyanion such as polystyrene sulfonic acid.

The line width of the conductive thin wire constituting the sensor channel 3 is not particularly limited, but can be, for example, 50 μm or less, 20 μm or less, preferably 10 μm or less, 7 μm or less, and further 5 μm or less. By setting the line width of the conductive thin wire to 10 μm or less, the effect that the conductive thin wire and the pattern composed of the conductive thin wire (here, the mesh pattern) becomes difficult to see can be obtained. The lower limit of the line width of the conductive thin wire is not particularly limited, but from the viewpoint of imparting stable conductivity, it can be set to, for example, 1 μm or more. When forming a conductive thin line having a line width of 10 μm or less, 7 μm or less, and further 5 μm or less by a printing method, for example, a coffee stain phenomenon is used to cover the peripheral edge of the ink applied on the film 2. A method of selectively depositing a conductive material can be used.

In the present embodiment, the longitudinal direction of the sensor channel 3 is parallel to the short side (the side oriented in the vertical direction in FIG. 1) 22 of the film 2. A plurality of sensor channels 3 are arranged side by side in 21 long sides (sides oriented in the lateral direction in FIG. 1) of the film 2. Here, the case where four sensor channels 3 are arranged side by side is shown, but the present invention is not limited to this, and a desired number of two, three, or five or more sensor channels 3 can be arranged side by side.

The distance α between the sensor channels 3 adjacent to each other is not particularly limited, but is preferably reduced to, for example, 150 μm or less, 100 μm or less, and further 50 μm or less. As a result, the sensor channels 3 can be arranged in a dense state, and the sensor sensitivity can be improved. It is also preferable to reduce the interval α to, for example, 30 μm or less, and further to 25 μm or less. As a result, the sensor sensitivity can be improved, and the gap (insulated portion) between the sensor channels 3 can be prevented from being visually recognized. The lower limit of the interval α is not particularly limited as long as it can insulate between the sensor channels 3, but for example, by setting it to 5 μm or more, 10 μm or more, and further 15 μm or more, even if dust or the like adheres between the sensor channels 3. Good insulation can be maintained.

It is preferable to provide a gap β between the end portion of the sensor channel 3 and the long side 21 of the film 2, which provides a short-circuit prevention effect. The short-circuit prevention effect will be described in detail later. When the interval β is provided, the value is not particularly limited, and can be, for example, 0.5 mm to 10 mm, and further 1 mm to 6 mm.

〔conductor〕
In this embodiment, the sensor film element 1 includes a conductor 4 extending from the end of the sensor channel 3 to the long side 21 of the film 2. The conductor 4 is made of a conductive material and has a structure different from that of the sensor channel 3. In the present embodiment, the conductor 4 is different in structure from the sensor channel 3 in that the conductor 4 is provided narrower than the channel width of the sensor channel 3. The case where the conductor 4 has a structure different from that of the sensor channel 3 is not limited to the case where the shape such as the width is different, and for example, when the conductor 4 is formed of a conductive material different from the sensor channel 3, or This includes the case where the conductor 4 has a resistance value different from that of the sensor channel 3 (for example, a sheet resistance value).

The method for forming the conductor 4 is not particularly limited, and the conductor 4 can be formed by, for example, a printing method using an ink containing a conductive material. As the conductive material, those exemplified for the sensor channel 3 can be used. As the printing method, for example, the inkjet method exemplified for the sensor channel 3 can be used.

[Leader wiring and connect part]
At least one of the plurality of sensor film elements 1 connected to each other may be provided with the lead wiring 5 and the connecting portion 6.

The lead wire 5 is electrically connected to the sensor channel 3 and extends to a connect portion 6 provided at a predetermined position on the film 2 (here, one end of the film 2).

An FPC (Flexible Printed Circuit) or FFC (Flexible Flat Cable) (not shown) can be connected to the connect unit 6. As a result, the sensor channel 3 can be electrically connected to an integrated circuit (IC) (not shown) for controlling the touch panel sensor via the FPC or FFC.

The method of forming the lead wiring 5 and the connecting portion 6 is not particularly limited, and can be formed by, for example, a printing method using ink containing a conductive material. As the conductive material, those exemplified for the sensor channel 3 can be used. As the printing method, for example, the inkjet method exemplified for the sensor channel 3 can be used.

[Position adjustment of sensor film element]
After preparing the two sensor film elements 1 and 1, as shown in FIG. 2, the two sensor film elements 1 and 1 each have a plurality of sensor channels 3 and 3 facing each other on a one-to-one basis. The position of the sensor film elements 1 and 1 of the above is adjusted.

Here, in a state where the film end faces constituting the long sides 21 and 21 of the two sensor film elements 1 and 1 are butted against each other, the other sensor is on the extension line of each sensor channel 3 of one sensor film element 1. The position is adjusted so that each sensor channel 3 of the film element 1 is arranged.

[Giving conductive members]
Next, as shown in FIG. 3, a conductive member 7 is provided so as to electrically connect a plurality of sets of sensor channels 3 and 3 facing each other with a connection portion between the two sensor film elements 1 and 1 interposed therebetween. do.

In the present embodiment, the sensor channels 3 and 3 are electrically connected by providing the conductive member 7 so as to come into contact with the conductors 4 and 4 extending from the opposing sensor channels 3 and 3, respectively.

In this embodiment, a conductive adhesive is used as the conductive member 7. The conductive adhesive is not particularly limited, and for example, an adhesive containing conductive particles can be used.

The opposing sensor channels 3 and 3 can function as one sensor channel by being electrically connected, and can be electrically connected to a common lead-out wiring 5 as shown in the figure.

[Sensor film]
As described above, a sensor film having an enlarged sensing effective area can be obtained. According to the present embodiment, it is not necessary to increase the size of the manufacturing apparatus as compared with the case where a sensor film is manufactured by processing one large-area film, for example, and it can be carried out preferably by using an existing manufacturing apparatus. .. Therefore, it is possible to avoid the problem that the equipment cost increases.

The effective sensing area is the area of the area effective for sensing by the sensor film. The region effective for sensing includes the region where the sensor channel is formed. In the present specification, "expanding the sensing effective area" means expanding the sensing effective area of the obtained sensor film more than the sensing effective area of one sensor film element alone.

In the present embodiment, by connecting a plurality of sensor film elements, the sensing effective area can be expanded so that the sensing effective area of the obtained sensor film is the total of the sensing effective areas included in each of the plurality of sensor film elements. ..

[Short prevention effect]
In the present embodiment, as described above, since the interval β is provided between the end portion of the sensor channel 3 and the long side 21 of the film 2, even if the position shift occurs in the above-mentioned position adjustment, a short circuit is prevented. The effect is obtained. This will be described with reference to FIG.

First, FIG. 4A shows a case where the interval β is omitted. In this case, the sensor channels 3 and 3 can be electrically connected by providing the conductive member 7 so as to come into contact with both the sensor channels 3 and 3 facing each other. At this time, depending on the misalignment between the two sensor film elements 1 and 1, as shown in FIG. 4A, the sensor channel 3 is not intended by another sensor channel 3 (other than the sensor channels 3 facing each other on a one-to-one basis). It is electrically connected to the sensor channel 3) and may cause a short circuit. Therefore, in order to prevent a short circuit, high accuracy may be required for position adjustment.

On the other hand, when the interval β is provided, the sensor channel 3 may be electrically connected to another unintended sensor channel 3 as shown in FIG. 4B even if the position is displaced. It is prevented and a short-circuit prevention effect is obtained. Therefore, high accuracy is not required for position adjustment, and production efficiency can be improved. Further, even when the position adjustment is difficult due to the film expanding or contracting due to heat treatment or the like and causing a dimensional change, the short-circuit prevention effect can be obtained.

As shown in FIG. 4B, the conductor 4 extending from the end of the sensor channel 3 to the long side 21 of the film 2 is a sensor channel from the viewpoint of more preferably exerting the short-circuit prevention effect by providing the interval β. It is preferable that the channel width is narrower than that of 3.

2. Second Embodiment Next, a method for manufacturing a sensor film according to the second embodiment will be described. In the first embodiment described above, a case where a plurality of sensor film elements are connected so as to be arranged side by side along the longitudinal direction of the sensor channel has been shown, but in the present embodiment, the plurality of sensor film elements are connected to the sensor channel. A case of connecting so as to be arranged side by side along the width direction of the above will be described. The description of the first embodiment will be appropriately incorporated into the present embodiment.

Below, as an example of the second embodiment (FIG. 5), an example in which the electrical connection between the sensor film elements 1 is not required is shown, and as another example (FIG. 6), the electrical connection between the sensor film elements 1 is shown. An example is shown.

In an example of the second embodiment, first, as shown in FIG. 5A, a plurality of sensor channels 3 parallel to the long side 21 direction of the film 2 are arranged side by side in the short side 22 direction of the film 2. At least two sensor film elements 1 are prepared. The sensor film element 1 is provided with a lead-out wiring 5 for each sensor channel 3, and is provided with a connecting portion 6 at an end portion of the film 2.

Next, as shown in FIG. 5B, the long sides of the two sensor film elements 1 and 1 so as not to electrically connect the sensor channels 3 and 3 included in the two sensor film elements 1 and 1, respectively. Connect each other. Conductivity is not required for connecting the long sides 21 and 21 to each other, and for example, an adhesive or adhesive tape (not shown) can be used.

In this way, a sensor film having an enlarged sensing effective area can be obtained.

According to an example of the second embodiment, it is not necessary to electrically connect the sensor channels 3 and 3 to each other, and it is not necessary to attach a conductive member, so that an effect that a sensor film can be easily manufactured can be obtained.

On the other hand, in another example of the second embodiment, first, as shown in FIG. 6A, a plurality of sensor channels 3 parallel to the long side 21 direction of the film 2 are provided in the short side 22 direction of the film 2. Prepare at least two sensor film elements 1 arranged side by side.

In such a sensor film element 1, the channel width of the sensor channel 3'closest to at least one long side 21 of the film 2 is smaller than the average value of the channel widths of the other sensor channels 3. Here, the sensor channel 3'has a channel width that is approximately half the channel width of the other sensor channels 3.

Next, as shown in FIG. 6B, the two sensor films 1 and 1 each have two sensor films so that the sensor channels 3'and 3'closest to the long side 21 are adjacent to each other. Adjust the positions of elements 1 and 1.

Here, in a state where the end faces of the films constituting the long sides 21 and 21 of the two sensor film elements 1 and 1 are butted against each other, the two sensor channels 3'and 3'are adjacent to each other in the channel width direction. The positions of the sensor film elements 1 and 1 of the above are adjusted.

Next, the conductive member 7 is provided so as to electrically connect the sensor channels 3'3'closest to the long side 21. The electrically connected sensor channels 3'and 3'can function as one sensor channel and can be electrically connected to the common lead wire 5. The channel width of one sensor channel formed by connecting the sensor channels 3'3'can be made equal to the channel width of the other sensor channels 3.

Here, a plurality of conductive members 7 are provided at predetermined intervals in the longitudinal direction of the sensor channels 3'3', but the present invention is not limited to this, and one conductive member 7 may be provided.

In this way, a sensor film having an enlarged sensing effective area can be obtained.

According to another example of the second embodiment, even if the distance between the sensor channels 3 and 3 is narrowed, an effect excellent in short-circuit prevention effect can be obtained. That is, in the first aspect described above, in order to narrow the distance between the sensor channels 3 and 3 arranged side by side with the connection portion interposed therebetween, it is necessary to arrange the sensor channels 3 so as to be sufficiently close to the long side 21. Therefore, the sensor channels 3 and 3 are likely to come into contact with each other, which may be slightly inferior in terms of the short-circuit prevention effect. On the other hand, in the second aspect, since it is premised that the sensor channels 3'and 3'are electrically connected to each other to form one sensor channel, there is no room for a short circuit at the connection site, and the short circuit occurs. Excellent preventive effect. Further, by narrowing the interval between the sensor channels 3 and 3, it is possible to prevent the interval from being visually recognized and improve the sensor sensitivity.

3. 3. Third Embodiment Next, a method for manufacturing a sensor film according to the third embodiment will be described. In this embodiment, a case where sensor channels are provided on both sides of the sensor film element will be described. The present embodiment is an embodiment in which the above-described first embodiment and the second embodiment are combined, and the description of the first embodiment and the second embodiment can be appropriately incorporated. By providing the sensor channels on both sides, for example, in a touch panel sensor, the sensor channel on one surface can be used as the position detection electrode on the X coordinate, and the sensor channel on the other surface can be used as the position detection electrode on the Y coordinate.

Below, as an example of the third embodiment (FIGS. 7 and 8), an example in which an electrical connection between the sensor film elements 1 is not required on the back surface of the film (corresponding to an example of the second embodiment (FIG. 5)). As another example (FIGS. 9 and 10), an example requiring an electrical connection between the sensor film elements 1 on the back surface of the film (corresponding to another example (FIG. 6) of the second embodiment) is shown. .. In the following description, although the drawing of the lead-out wiring and the connecting portion is omitted, the configuration can be the same as that of the first embodiment and the second embodiment described above.

In an example of the third embodiment, first, as shown in FIG. 7, a plurality of sensor channels 3 parallel to the short side 22 direction of the film 2 are arranged side by side in the long side 21 direction of the film 2 on the surface of the film 2. At least two sensor film elements 1 are prepared on the back surface of the film 2 in which a plurality of sensor channels 3 parallel to the long side 21 direction of the film 2 are arranged side by side in the short side 22 direction of the film 2. do. The longitudinal direction of the sensor channel 3 on the front surface of the film 2 and the longitudinal direction of the sensor channel 3 on the back surface are oriented in directions intersecting each other.

Next, the positions of the two sensor film elements are adjusted so that the plurality of sensor channels 3 and 3 on the surface of each of the two sensor film elements 1 and 1 face each other on a one-to-one basis.

Next, as shown in FIG. 8, the conductive member 7 electrically connects between the plurality of sets of sensor channels 3 and 3 on the surfaces facing each other with the connection portion between the two sensor film elements 1 and 1 sandwiched between them. Is given.

Here, with respect to the back surface of the film 2, the sensor channels 3 and 3 on the back surface of the two sensor film elements 1 and 1 are electrically connected to each other, as in the case of the second embodiment described above (FIG. 5). I try not to.

In this way, a sensor film having an enlarged sensing effective area on both sides of the film can be obtained.

On the other hand, in another example of the third embodiment, as described below, with respect to the back surface of the film 2, the sensor channels 3 and 3 on the back surface are the same as in the other example of the second embodiment (FIG. 6) described above. Electrically connect each other.

In another example of the third embodiment, first, as shown in FIG. 9, a sensor channel 3 parallel to the short side 22 direction of the film 2 is placed on the surface of the film 2 in the long side 21 direction of the film 2. A plurality of sensor channels 3 parallel to the long side 21 direction of the film 2 are arranged side by side in the short side 22 direction of the film 2 on the back surface of the film 2, and at least one of the films 2 is arranged side by side. Prepare at least two sensor film elements 1 in which the channel width of the back surface sensor channel 3'closest to the long side 21 of is smaller than the average value of the channel widths of the other back surface sensor channels 3.

Next, a plurality of sensor channels on the front surface of each of the two sensor film elements 1 and 1 face each other on a one-to-one basis, and the back surface of the back surface of the two sensor film elements 1 and 1 each of which is closest to the long side 21. The positions of the two sensor film elements 1 and 1 are adjusted so that the sensor channels 3'and 3'are adjacent to each other.

Next, as shown in FIG. 10, the conductive member 7 is electrically connected between the plurality of sets of sensor channels 3 and 3 on the surfaces facing each other with the connection portion between the two sensor film elements 1 and 1 sandwiched between them. And the conductive member 7 is attached so as to electrically connect the sensor channels 3'3'on the back surface closest to the long side 21.

In this way, a sensor film having an enlarged sensing effective area on both sides of the film can be obtained.

4. Others [Connecting many sensor film elements]
In the above description, the case where two sensor film elements are connected is mainly shown, but three or more sensor film elements may be connected. The number of sensor film elements to be connected can be appropriately set so that a desired sensing effective area is formed according to the purpose, application, and the like.

For example, the sensor film shown in FIG. 11 is configured by connecting nine sensor film elements in 3 columns × 3 rows. Here, when connecting the sensor film elements so as to be arranged side by side along the longitudinal direction of the sensor channel, the method described in the first embodiment can be used. When connecting the sensor film elements so as to be arranged side by side along the width direction of the sensor channel, the method described in the second embodiment can be used.

As described in the third embodiment, the sensor film shown in FIG. 11 has sensor channels on both the front surface and the back surface of the film, but the sensor film is not limited to this, and the sensor is limited to only one of the surfaces. It may have a channel.

[Other examples of sensor channels]
In the above description, the case where the conductive material is arranged in a mesh shape to form the sensor channel has been mainly described, but the pattern of the sensor channel is not limited to the mesh pattern. The pattern of the sensor channel may be, for example, a stripe pattern, a random pattern, or the like.

Further, the pattern of the sensor channel may be a pattern formed by combining a plurality of conductive thin lines forming a geometric figure. FIG. 12 shows an example of a sensor channel composed of a pattern composed of a plurality of conductive thin lines forming a geometric figure.

In the example of FIG. 12, the sensor channel 3 is composed of a plurality of conductive thin wires 31 forming a quadrangle. The pattern of the sensor channel 3 is formed by two-dimensionally arranging a plurality of conductive thin wires 31 forming a quadrangle in the direction of two diagonal lines of the quadrangle.

Here, the conductive thin wires 31 and 31 forming a quadrangle adjacent to each other intersect at two intersections with both sides sandwiching the apex intersecting each other. As a result, the electrical connection between the conductive thin wires 31 and 31 is ensured, and good conductivity is imparted to the sensor channel 3.

In the pattern shown in FIG. 12, a case is shown in which all sets of conductive thin wires 31 and 31 forming quadrangles adjacent to each other intersect at two intersections with both sides sandwiching the apex intersecting each other, but the present invention is limited to this. Instead, at least a set of conductive thin wires 31 and 31 forming a quadrangle adjacent to each other may intersect each other at two intersections with both sides sandwiching the apex.

Examples of closed geometric figures include polygons such as triangles, quadrilaterals, hexagons, and octagons. Also, closed geometric figures can include curved elements such as circles, ellipses and the like. Even in cases other than quadrangles, it is preferable that the conductive thin lines forming geometric figures adjacent to each other intersect at two intersections.

The sensor channel may be solidly formed of, for example, a metal oxide film made of indium tin oxide (ITO), tin oxide or the like, a metal thin film, a conductive polymer film, or the like, but it is preferable that the sensor channel has a pattern. Is. When the sensor channel has a pattern, the effect of reducing the material cost can be obtained even when the area is increased. From the viewpoint of imparting good conductivity to the sensor channel, among various patterns, a mesh pattern or a pattern composed of a plurality of conductive thin lines forming a geometric figure is preferable.

The conductive material is not limited to the case where the fine particles described with respect to the printing method (ink) described above are used, and the material exemplified as the fine particles can be used in various forms other than the fine particles. As the conductive material, for example, indium tin oxide (ITO), tin oxide, a metal thin film, a conductive polymer, and a thin metal wire, a wire, or a tube can be electrically connected. In the case of a large area, it is particularly preferable that the thin metal wire, the wire, and the tube are electrically connected. The conductive material described for the sensor channel can also be used for conductors and conductive members.

[Other examples of conductors]
In the above description, the case where the conductor 4 extending from the end of the sensor channel 3 is composed of one wiring is shown, but the present invention is not limited to this. Hereinafter, another example of the conductor 4 will be described with reference to FIG. FIG. 13 shows an enlarged view of the vicinity of the connection portion between the sensor film elements connected to each other.

The conductor 4 shown in FIG. 13A is formed in a band shape by a mesh pattern similar to that of the sensor channel 3. The width of the strip-shaped conductor 4 is smaller than the channel width of the sensor channel 3.

The conductor 4 shown in FIG. 13B is formed of a mesh pattern similar to that of the sensor channel 3, and is provided so as to gradually become narrower as it approaches the long side 21 of the film 2 from the end of the sensor channel 3. There is.

The conductor 4 shown in FIG. 13C is provided so that the width gradually narrows as it approaches the long side 21 of the film 2 from the end of the sensor channel 3, and the tip is sharpened toward the long side 21 of the film 2. ing.

In the examples of FIGS. 13 (a) to 13 (c), the sensor is provided by attaching a conductive member (not shown in FIG. 13) so as to come into contact with the conductors 4 and 4 extending from the opposing sensor channels 3 and 3, respectively. Channels 3 and 3 can be electrically connected. Also in these examples, the above-mentioned short-circuit prevention effect is satisfactorily exhibited.

Further, although not shown, the conductor 4 may be provided with a length not reaching the long side 21 of the film 2 from the end of the sensor channel 3. In this case, the sensor channels 3 and 3 can be electrically connected by providing the conductive member so as to come into contact with the opposing conductors 4 and 4. Further, when the width of the conductor 4 is narrower than the channel width of the sensor channel 3, the short-circuit prevention effect is also exhibited. When the width of the conductor 4 is not constant as in the examples of FIGS. 13 (b) and 13 (c), the average value is taken as the width of the conductor 4. From the viewpoint of preferably exerting the short-circuit prevention effect, the conductor 4 is preferably thinner than the channel width of the sensor channel 3 at least at a position in contact with the long side 21 of the film 2.

Furthermore, as in the example of FIG. 13 (d), the conductor may be omitted. When the conductor is omitted, the sensor channels 3 and 3 can be electrically connected by providing the conductive member so as to come into contact with the sensor channels 3 and 3 facing each other. In this example, the short-circuit prevention effect can be obtained by providing the sensor channel 3 with a length that does not reach the long side 21 of the film 2.

In the above description, the case where the conductor is a single wire or the case where the conductor is a mesh pattern is mainly shown, but the present invention is not limited to this. The conductor pattern may be, for example, a stripe pattern, a random pattern, or the like. Further, the conductor pattern may be a pattern formed by combining a plurality of conductive thin lines forming a geometric figure exemplified for the sensor channel. Further, the conductor is not limited to the one having a pattern, and may be composed of a conductive material imparted in a solid shape. From the viewpoint of reducing the visual discomfort, it is preferable that the conductor has the same pattern as the sensor channel, as shown in FIGS. 13 (a) to 13 (c).

In the above description, the case where the conductor 4 is provided on both of the two sensor film elements 1 and 1 has been described, but the conductor 4 may be provided on only one of the two sensor film elements 1 and 1. Even in this case, the short-circuit prevention effect can be obtained.

[Other examples of conductive members]
In the above description, the case where the conductive member is composed of the conductive adhesive has been mainly described, but the present invention is not limited to this. Hereinafter, other examples of the conductive member will be described with reference to FIGS. 14 to 16.

In the example of FIG. 14, as shown in FIG. 14A, a plurality of sheets 9 (four in this example) including the support 8 and the conductive member 7 supported on the support 8 are used. FIG. 14A shows the sheet 9 in a plan view from the side opposite to the surface on which the conductive member 7 is provided.

As the support 8, for example, a film or the like can be used. When a film is used as the support 8, the description of the film 2 constituting the sensor film element 1 is referred to as the composition of the material and the like. As the material of the film constituting the support 8, for example, the same material as the film 2 may be selected.

Similar to the sensor channel 3, the conductive member 7 is composed of a plurality of conductive thin wires arranged in a mesh shape. As a method for forming such a conductive thin wire, the method described for the sensor channel 3 can be used.

Next, as shown in FIG. 14B, a plurality of sensor channels 3 and 3 of a plurality of sets (4 sets in this example) facing each other with a connection portion between the two sensor film elements 1 and 1 are interposed. Each sheet 9 is superposed on the connection portion so as to be electrically connected by the conductive member 7. Here, the conductors 4 and 4 extending from the opposing sensor channels 3 and 3 and the conductive member 7 are overlapped so as to be in contact with each other. In this way, the sensor channels 3 and 3 can be electrically connected.

When the sheets 9 are overlapped, the conductive members 7 can be overlapped so as to face the connection portion. The sheet 9 can be fixed to the connection portion by using, for example, a conductive adhesive or the like.

In the example of FIG. 14, the conductive member 7 is formed on the support 8 by the same method as the sensor channel 3, and has the same configuration as the sensor channel 3. Specifically, the conductive member 7 has a width equal to the channel width of the sensor channel 3, and is composed of the same conductive material as the sensor channel 3 and the same mesh pattern as the sensor channel 3.

The region provided with the conductive member 7 having the same pattern as the sensor channel 3 can form a region effective for sensing even if the region is not formed with the sensor channel 3. As a result, the effective sensing area can be further expanded. In addition, it is possible to improve the sensor sensitivity at the connection site.

In the example of FIG. 14, the length of the conductive member 7 in the short side direction of the film 2 is shorter than the length between the opposing sensor channels 3 and 3. As a result, the sheets 9 can be superposed so that a predetermined distance is formed between the conductive member 7 and the sensor channel 3. As a result, even if the overlapping positions of the sheets 9 are displaced, the effect of preventing a short circuit can be obtained. For example, when the position adjustment can be made highly accurate, the length of the conductive member 7 in the short side direction of the film 2 may be the same as or longer than the length between the opposing sensor channels 3 and 3. When the length of the conductive member 7 in the short side direction of the film 2 is longer than the length between the opposing sensor channels 3 and 3, the conductor 4 may be omitted as appropriate.

In the example of FIG. 15, first, as shown in FIG. 15A, a sheet 9 composed of a support 8 and a plurality of (four in this example) conductive members 7 supported on the support 8 is formed. prepare. The plurality of conductive members 7 are arranged on the support 8 at predetermined intervals.

Next, a plurality of sets (4 sets in this example) of sensor channels 3 and 3 facing each other with a connection portion between the two sensor film elements 1 and 1 are electrically connected by a plurality of conductive members 7. The sheet 9 is superposed on the connection portion as described above. Here, as in the example of FIG. 15, the conductors 4 and 4 extending from the opposing sensor channels 3 and 3 and the conductive member 7 are overlapped so as to be in contact with each other. In this way, the sensor channels 3 and 3 can be electrically connected.

Also in the example of FIG. 15, when stacking the sheets 9, for example, a conductive adhesive or the like can be used. The conductive adhesive can be used by defining a coating range for each conductive member 7 on the support 8. Further, the sheets 9 may be overlapped with each other by using an adhesive tape as the support 8.

In the example of FIG. 16, first, as shown in FIG. 16A, a sheet 9 composed of a support 8 and a plurality of (four in this example) conductive members 7 supported on the support 8 is formed. prepare. The plurality of conductive members 7 are arranged on the support 8 at predetermined intervals.

In this example, as the support 8, a cover layer for covering the sensor channel 3 is used. The cover layer may be, for example, a protective layer that protects the sensor channel 3, or may be a white layer for forming an image projection surface (screen) on the sensor channel 3. As the white layer, for example, a resin layer in which a white pigment is dispersed can be used.

By forming a screen on the sensor channel 3, an image from an image projection device (projector) (not shown) can be projected and displayed on the screen. In this way, a sensor film (for example, a touch screen) having both a sensor function and a screen function can be configured.

In the example of FIG. 16, the sheet 9 can be superposed on the joint portion in the same manner as in the example of FIG. 15, and the sensor channels 3 and 3 can be electrically connected as shown in FIG. 16 (b).

At this time, when the sheet 9 composed of the support 8 having a large area that covers the sensor channel 3 is used, although not shown, the surface on which the plurality of conductive members 7 are formed is on the upper side at the time of superposition. The sheets 9 are arranged so as to be such that, then, a plurality of sensor films are arranged while being aligned on the sheet 9, and the opposing sensor channels 3 and 3 are electrically connected by the plurality of conductive members 7, respectively. can do.

As shown in FIG. 16B, the support 8 of the sheet 9 can cover and protect not only the sensor channel 3 but also the lead wiring 5. By exposing the connecting portion 6 from the support 8, the FPC or FFC can be configured to be connectable.

In the examples of FIGS. 14 to 16, the case where the conductive member is supported on the support has been described, but the present invention is not limited to this. If the conductive member is made of, for example, a metal foil and has sufficient strength, the support may be omitted.

In the examples of FIGS. 14 to 16, as described above, the conductive member 7 has the same pattern as the sensor channel 3, so that the effective sensing area can be further expanded. Not limited to these examples, from the viewpoint of successfully achieving further expansion of the effective sensing area, the average of the portions provided with the conductor 4 and the conductive member 7 between the sensor channels 3 and 3 electrically connected to each other. The conductive material coverage is preferably in the range of 10% to 300% of the average conductive material coverage of the portion where the sensor channel 3 is formed. As a result, the difference in capacitance (parasitic capacitance) between the sensor channel 3 and the conductor 4 and the conductive member 7 between the sensor channels 3 and 3 becomes small, and sensing between the sensor channels 3 and 3 with good sensitivity. This makes it possible, and further expansion of the effective sensing area can be satisfactorily achieved.

The average conductive material coverage is obtained by looking at the corresponding portion of the film 2 (the portion to which the conductor 4 and the conductive member 7 are provided, or the portion where the sensor channel 3 is formed) in a plan view, and the conductivity in the area of the corresponding portion. It is obtained as the ratio (%) of the area covered with the sex material. For example, the average conductive material coverage can be increased by increasing the width of the conductive member, increasing the thickness of the wires constituting the conductive member, increasing the arrangement density of the wires constituting the conductive member, and the like. .. By reversing the above, the average conductive material coverage can be reduced. In this way, the average conductive material coverage can be adjusted so as to satisfy the above range.

The average conductive material coverage of the portion where the sensor channel 3 is formed can be set in the range of, for example, 0.25% to 10%. On the other hand, the average conductive material coverage of the portion to which the conductor 4 and the conductive member 7 are provided can be set in the range of, for example, 1% to 10%.

Further, as an example, when the width of the conductive member is narrower than the channel width of the sensor channel 3, the average conductive material coverage decreases as it is, but the thickness of the wire constituting the conductive member is increased. The average conductive material coverage of the conductive member 7 is determined by increasing the arrangement density of the lines constituting the conductive member, increasing the conductivity of the conductive material constituting the conductive member (using a highly conductive material), and the like. It can be adjusted to meet the specified range.

The length (width) of the conductive member 7 in the long side 21 direction of the film 2 may be the same as the channel width of the sensor channel 3, but is preferably in the range of 50% or more and less than 100% of the channel width. Within this range, a short-circuit prevention effect can be obtained, and the conductive member 7 and the sensor channel 3 are less likely to be visually distinguished, and a visual discomfort can be reduced. Further, the average conductive material coverage of the conductive member 7 and the sensor channel 3 becomes close to each other, and the sensor sensitivity of the connection portion is improved.

Further, the transmittance of the conductive member 7 is preferably in the range of −50% to + 5% with respect to the transmittance of the sensor channel 3. Within this range, the conductive member 7 and the sensor channel 3 are less likely to be visually distinguished, and a visual discomfort can be reduced. Further, since there is a certain degree of correlation between the transmittance and the average conductive material coverage, the average conductive material coverage of the conductive member 7 and the sensor channel 3 is close to the value within the above range. Therefore, the sensor sensitivity of the connection part is improved. The transmittance is a value measured as total light transmittance (% T) using "AUTOMATIC HAZEMETER (MODEL TC-HIIIDP)" manufactured by Tokyo Denshoku Co., Ltd.

In the above description, the case where the conductive member is a conductive adhesive or the case where the conductive member is a mesh pattern is mainly shown, but the present invention is not limited to this. The pattern of the conductive member may be, for example, a stripe pattern, a random pattern, or the like. Further, the pattern of the conductive member may be a pattern formed by combining a plurality of conductive thin lines forming a geometric figure exemplified for the sensor channel. Further, the conductive member is not limited to the one having a pattern, and may be made of a solid conductive material.

[Method of forming sensor channels, conductors, lead wiring and connecting parts]
In the above description, the case where the inkjet method is used as the printing method for forming the sensor channel, the conductor, the lead-out wiring, the connecting portion, and the conductive member has been mainly described, but the present invention is not limited to this. As the printing method, for example, a screen printing method, a letterpress printing method, an intaglio printing method, an offset printing method, a flexographic printing method, an inkjet method, or the like may be used. The method for forming the sensor channel, the conductor, and the conductive member is not limited to the printing method, and for example, a photolithography method or the like may be used.

Further, for example, when the sensor film element is available as a commercially available product, the steps of forming the sensor channel, the conductor, the lead-out wiring, the connecting portion, and the like can be omitted as appropriate.

[Plating film]
The sensor channel, the conductor, and the conductive member may have a plating film on the surface. The metal constituting the plating film is not particularly limited, and examples thereof include Ni, Al, Zn, and Sn. By providing the plating film, conductivity and durability can be improved. Further, when a metal such as Ni, Al, Zn, or Sn is used, the tint of the surface of the plating film is suppressed, and the effect that the sensor channel, the conductor, and the conductive member are hard to see can be obtained.

In the above description, the descriptions "front surface" and "back surface" of the film are used to conveniently distinguish one surface of the film from the other surface formed on the back side when viewed from the one surface. However, in a product provided with a sensor film, the "front surface" is oriented toward the front surface side, and the "back surface" is oriented toward the back surface side. In the product provided with the sensor film, the "front surface" may be oriented toward the back surface side and the "back surface" may be oriented toward the front surface side.

In the above description, the case where the film constituting the sensor film element is rectangular has been mainly described, but the present invention is not limited to this. The film can have various shapes.

In the above description, the sensor film constituting the touch panel sensor has been described, but the present invention is not limited to this. The detection target by the sensor channel constituting the sensor film is not limited to the touch, and may be various detection targets.

In the above description, the configuration described for one embodiment or one example can be appropriately applied to other embodiments or other examples.

1: Sensor film element 2: Film 21: Long side 22: Short side 3: Sensor channel 4: Conductor 5: Drawer wiring 6: Connect part 7: Conductive member 8: Support 9: Sheet

Claims (10)

A plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film are prepared.
Next, a method for manufacturing a sensor film in which a plurality of the sensor film elements are connected so as to expand the effective sensing area.
Conductive so as to electrically connect the sensor channel constituting one of the sensor film elements and the sensor channel constituting the other sensor film element to the connection portion between the sensor film elements connected to each other. Give the member,
The film is rectangular, and at least two sensor film elements are prepared in which a plurality of the sensor channels parallel to the short side direction of the film are arranged side by side in the long side direction of the film.
Next, the positions of the two sensor film elements are adjusted so that the plurality of sensor channels included in the two sensor film elements face each other on a one-to-one basis.
Next, a conductive member is provided so as to electrically connect a plurality of sets of the sensor channels facing each other with the connection portion between the two sensor film elements interposed therebetween.
At least one of the two sensor film elements includes a conductor extending from the end of the sensor channel to the connection portion on the film, and the conductor has a structure different from that of the sensor channel. ,
By applying the conductive member on the conductor, the sensor channels are electrically connected to each other.
A method for manufacturing a sensor film, wherein the conductor is thinner than the channel width of the sensor channel. The average conductive material coverage of the conductor and the portion to which the conductive member is provided between the sensor channels electrically connected to each other is 10% to 10% of the average conductive material coverage of the portion where the sensor channel is formed. method for producing a sensor film according to claim 1, wherein in the range of 300%. A sheet composed of a support and a plurality of the conductive members arranged on the support at predetermined intervals is prepared.
Next, the sheet is superposed on the connection portion so that the plurality of sets of the sensor channels facing each other with the connection portion between the two sensor film elements are electrically connected by the plurality of conductive members. The method for producing a sensor film according to claim 1 or 2 , wherein the sensor film is produced. A plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film are prepared.
Next, a method for manufacturing a sensor film in which a plurality of the sensor film elements are connected so as to expand the effective sensing area.
Conductive so as to electrically connect the sensor channel constituting one of the sensor film elements and the sensor channel constituting the other sensor film element to the connection portion between the sensor film elements connected to each other. Give the member,
The film is rectangular, and a plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film, and the sensor closest to at least one long side of the film. The channel width of the channel is smaller than the average value of the channel widths of the other sensor channels. At least two sensor film elements are prepared.
Next, the two sensor film elements are positioned so that the sensor channels closest to the long side of each of the two sensor film elements are adjacent to each other.
Next, a method for manufacturing a sensor film, characterized in that a conductive member is provided so as to electrically connect the sensor channels closest to the long side. A plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film are prepared.
Next, a method for manufacturing a sensor film in which a plurality of the sensor film elements are connected so as to expand the effective sensing area.
The film is rectangular, and a plurality of the sensor channels parallel to the short side direction of the film are arranged side by side in the long side direction of the film on the front surface of the film, and the back surface of the film is covered with the sensor channels. A plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film, and the channel width of the sensor channel on the back surface closest to at least one long side of the film is , At least two sensor film elements smaller than the average value of the channel widths of the other sensor channels on the back surface are prepared.
Next, the plurality of sensor channels on the front surface of each of the two sensor film elements face each other on a one-to-one basis, and the two sensor film elements each include the back surface of the back surface closest to the long side. The two sensor film elements are positioned so that the sensor channels are adjacent to each other.
Next, a conductive member is provided so as to electrically connect a plurality of sets of the sensor channels on the surface facing each other with the connection portion between the two sensor film elements interposed therebetween, and the closest to the long side. A method for manufacturing a sensor film, characterized in that a conductive member is provided so as to electrically connect the sensor channels on the back surface thereof. It is composed of a plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film.
A sensor film in which a plurality of the sensor film elements are connected so as to expand the effective sensing area.
Conductive so as to electrically connect the sensor channel constituting one of the sensor film elements and the sensor channel constituting the other sensor film element to the connection portion between the sensor film elements connected to each other. Members are attached,
The film is rectangular, and at least two sensor film elements are formed by arranging a plurality of the sensor channels parallel to the short side direction of the film in the long side direction of the film.
The positions of the two sensor film elements are adjusted so that the plurality of sensor channels included in the two sensor film elements face each other on a one-to-one basis.
A conductive member is provided so as to electrically connect a plurality of sets of the sensor channels facing each other with the connection portion between the two sensor film elements interposed therebetween.
At least one of the two sensor film elements includes a conductor extending from the end of the sensor channel to the connection portion on the film, and the conductor has a structure different from that of the sensor channel. ,
By providing the conductive member on the conductor, the sensor channels are electrically connected to each other.
The conductor is a sensor film characterized by being thinner than the channel width of the sensor channel. The average conductive material coverage of the conductor and the portion to which the conductive member is provided between the sensor channels electrically connected to each other is 10% to 10% of the average conductive material coverage of the portion where the sensor channel is formed. The sensor film according to claim 6 , wherein the range is 300%. A sheet composed of a support and a plurality of the conductive members arranged at predetermined intervals on the support is superposed on the connection portion between the two sensor film elements.
6. Sensor film. It is composed of a plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film.
A sensor film in which a plurality of the sensor film elements are connected so as to expand the effective sensing area.
Conductive so as to electrically connect the sensor channel constituting one of the sensor film elements and the sensor channel constituting the other sensor film element to the connection portion between the sensor film elements connected to each other. Members are attached,
The film is rectangular, and at least two sensor film elements are formed by arranging a plurality of the sensor channels parallel to the long side direction of the film in the short side direction of the film, and at least the film. The channel width of the sensor channel closest to one long side is smaller than the average value of the channel widths of the other sensor channels.
The two sensor film elements are positioned so that the sensor channels closest to the long side of each of the two sensor film elements are adjacent to each other.
A sensor film characterized in that a conductive member is provided so as to electrically connect the sensor channels closest to the long side. It is composed of a plurality of sensor film elements composed of a film and a plurality of sensor channels formed on the film.
A sensor film in which a plurality of the sensor film elements are connected so as to expand the effective sensing area.
The film is rectangular, and at least two sensor film elements have a plurality of sensor channels parallel to the short side direction of the film arranged side by side in the long side direction of the film on the surface of the film. On the back surface of the film, a plurality of the sensor channels parallel to the long side direction of the film are arranged side by side in the short side direction of the film, and are closest to at least one long side of the film. The channel width of the sensor channel on the back surface is smaller than the average value of the channel widths of the sensor channels on the other back surface.
A plurality of the sensor channels on the front surface of each of the two sensor film elements face each other on a one-to-one basis, and each of the two sensor film elements includes the sensor channel on the back surface closest to the long side. The two sensor film elements are positioned so that they are adjacent to each other.
A conductive member is provided so as to electrically connect a plurality of sets of the sensor channels on the surface facing each other with the connection portion between the two sensor film elements interposed therebetween, and the closest to the long side. A sensor film characterized in that a conductive member is provided so as to electrically connect the sensor channels on the back surface thereof.

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