JP2003263119A - Rib-attached electrode and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable rib-attached electrode free from its ribs being peeled off when environments are changed or the electrode is used for a long time and a rib-attached electrode manufacturing method having high manufacturing efficiency and capable of improving reproducibility for the positions of the ribs and the electrode and reducing a manufacturing cost. <P>SOLUTION: The rib-attached electrode 12 has a sheet 18 obtained by integrating a bottom plate part 14 and ribs 16 projected from the bottom plate part 14 and electrodes 20 of which surface resistance is 1×10<SP>9</SP>Ω or less are formed at least on a part of the sheet 18. The rib-attached electrode 12 is manufactured by either one of a method for forming the sheet 18 integrating the ribs 16 and the bottom plate part 14 by injection molding or the like and then forming the electrodes 20 by deposition or the like and a method for forming electrodes on a film or a plate by deposition or the like and then forming ribs by embossing molding or the like. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display such as a plasma display panel (PDP) or an organic light emitting device (EL), or an electronic paper using an image display material such as electrophoresis, thermal rewritable or electrochromy. The present invention relates to a ribbed electrode and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, with the increase in screen size of image display media,
Thinning and weight reduction have become important. Against this background, liquid crystal displays (LCDs) and plasma display panels (PDPs) have come to be used in personal computer monitors and home televisions.

Each of these has two or more opposed substrates, but it is necessary to keep the distance between the substrates (cell gap) uniform in order to obtain high image quality. Therefore, conventionally, the electrodes and the ribs may be used as a pair. For example, plasma display panel (PDP)
In, the electrodes are used to apply the drive voltage, and
Ribs are used to maintain the cell gap. Furthermore, even for electronic paper, which has been actively developed in recent years, depending on the drive system,
Electrodes and ribs may be used for the same purpose. In each of these, an electrode is provided on one surface of a film or a plate, and a rib having a shape according to need is formed on the same surface as the electrode.

Usually, such ribs are formed on a film or plate provided with electrodes by screen printing, photolithography, or a method in which photolithography is combined with sandblasting. In these methods, since the rib and the bottom plate having the electrode are not integrated,
An interface exists on the bottom plate having the rib and the electrode. Therefore, as the ribs are made higher and narrower (that is, the aspect ratio, which is the ratio of the rib height to the 50% height position width, is larger), and the surface resistance of the electrode is smaller, the bonding becomes more difficult. Therefore, the adhesion between the ribs and the electrodes cannot be maintained or peeled off during long-term use or use in a high temperature and high humidity environment. Therefore, when the rib height is set to be less than a certain limit (for example, less than 50 μm), or when the rib height is set to be more than the above certain limit, it is necessary to set the aspect ratio to be less than 1, for example.

However, if the rib height and aspect ratio are limited in this way, the surface area created by the rib wall and the bottom plate portion becomes small, so that, for example, in a PDP, the phosphor coating amount is small and the light emission efficiency is poor. Further, the electronic paper has a problem that the filling amount of the image forming material is small and the contrast is low.

Further, in order to handle the electrode substrate, it is necessary to have a certain thickness from the viewpoint of strength. Therefore, the electrodes are often formed on the rib side, but in this case,
In order to reduce the surface resistance of the electrode, it is necessary to increase the thickness of the electrode. For this reason, the adhesiveness with the rib is lowered due to the influence of the step. Further, in particular, in the method of forming ribs by screen printing, since viscous ink is placed on the substrate, there is a problem that the ribs are likely to sag or collapse during molding, resulting in poor molding accuracy. Further, since the rib and the electrode are separately manufactured, the manufacturing efficiency is poor, the reproducibility of the position of the rib and the electrode (positioning accuracy) is poor, and the manufacturing cost is high. Especially photolithography,
In sandblasting, since an expensive resist is applied to the front surface of the substrate and then portions other than the ribs are removed, the manufacturing cost may be extremely high.

[0007]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention has a highly reliable ribbed electrode which is free from rib separation during environmental changes or long-term use, and has a high manufacturing efficiency and a rib and electrode An object of the present invention is to provide a manufacturing method of a ribbed electrode having high position reproducibility and low manufacturing cost.

[0008]

In order to solve the above problems, the invention according to claim 1 has a bottom plate portion and a rib projecting from the bottom plate portion and integrally formed with the bottom plate portion. An electrode with a rib, comprising: a sheet; and an electrode having a surface resistance of 1 × 10 ⁹ Ω or less, the electrode being disposed on at least one surface of the sheet, wherein the rib has a cross section in a direction normal to the bottom plate portion. Average height from 50μ
The ratio (c / d) of the width d and the height c at a position of m or more and a height of 50% is 1 or more.

That is, in this ribbed electrode, the bottom plate portion and the rib are integrated to form a sheet, and the electrode is arranged on at least one surface of the sheet. Although the surface resistance of the electrode is set to 1 × 10 ⁹ Ω or less, even if the surface resistance of the electrode is reduced as described above, the rib can be prevented from peeling from the bottom plate portion. By setting the surface resistance of the electrode to 1 × 10 ⁹ Ω or less, the thickness and width of the electrode are less restricted, and the degree of freedom of the electrode pattern is increased.

The ribs of the ribbed electrode have an average height from the bottom plate portion of 50 in the cross section in the direction normal to the bottom plate portion.
The ratio (c / d) of the width d and the height c at the position of μm or more and the height of 50% is 1 or more. As a result, the degree of freedom of the volume ratio between the portion where the rib is present (rib portion) and the portion where the rib is not present (rib absent portion) is increased,
The application of the ribbed electrode becomes wider. Moreover, even if the rib has such a shape, in the present invention, since the rib is integrated with the bottom plate portion, it is possible to prevent the rib from being unintentionally peeled off.

The lower limit value of the surface resistance of the electrode is not particularly limited. The smaller the value, the more efficiently the current can flow. However, in reality, depending on the material forming the electrode, The lower limit of surface resistance is determined.

Regarding the above ratio (c / d),
The upper limit value is not particularly limited, and can be set to an optimum value depending on the application of the ribbed electrode.

According to a second aspect of the present invention, in the first aspect of the invention, the ribs are formed so as to have a stripe shape or a lattice shape when viewed in a direction normal to the bottom plate portion. And

As a result, a space surrounded by the ribs can be formed, and the volume ratio between the rib-absent portion and the rib portion can be increased,
It is highly effective for applications where a film or plate is attached to the rib side.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the rib is at a position 90% in height from the bottom plate portion in a cross section in the direction normal to the bottom plate portion. The ratio (a / b) between the width a and the width b of the bottom of the rib is 0.8 or less.

As a result, the width b at the bottom of the rib becomes relatively wider than the width a at a position 90% in height from the bottom plate, that is, the width near the tip (top) of the rib. The rib strength is increased. Further, when the sheet is viewed in the normal direction, comparing the area occupied by the side surface of the rib and the tip surface of the rib, the area occupied by the tip surface of the rib becomes smaller. This makes it possible to reduce the area of the region that does not substantially contribute to image display.

The lower limit of this ratio (a / b) is not particularly limited and can be set to an optimum value depending on the application of the ribbed electrode.

According to a fourth aspect of the invention, in the invention of the third aspect, the average width of the bottom of the rib is 5 μm or more and 500 μm in a cross section orthogonal to the longitudinal direction of the rib.
The average distance between adjacent ribs is 20 μm or more and 50000 μm or less, and the average height of the ribs is 50 μm.
It is characterized in that it is 1000 μm or less.

By making the shape of the ribs like this, the ribbed electrode has excellent manufacturability, and since the ribs are present at appropriate intervals on the sheet, the mechanical strength of the sheet alone becomes high, The mechanical strength of the ribbed electrode is also increased.

The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the total light transmittance is 60% or more.

By thus setting the total light transmittance to 60% or more, the back surface of the ribbed electrode (the surface on the side opposite to the observer) can be observed through the ribbed electrode by the light rays passing through the ribbed electrode. Will be possible. Further, it becomes possible to make the tip end surface of the rib invisible (or make it inconspicuous).

According to a sixth aspect of the invention, in the invention according to any one of the first to fifth aspects, the average thickness of the bottom plate portion is 5 μm or more and 3000 μm or less.

This makes it possible to maintain good handling of the ribbed electrode.

According to a seventh aspect of the invention, in the invention according to any one of the first to sixth aspects, the electrode is
When viewed in the normal direction of the bottom plate part, it is formed in a stripe shape,
In addition, in a cross section orthogonal to the longitudinal direction of the electrodes, the average width is 10 μm or more and 10000 μm or less, and the average interval between adjacent electrodes is 10 μm or more and 10000 μm or less.

With such an electrode shape, for example, a desired electrode pattern can be formed corresponding to the rib-absent portion. Therefore, the ribbed electrode can be formed on an image display medium for displaying information for each address. Can be preferably used.

According to an eighth aspect of the present invention, there is provided a method for producing a ribbed electrode according to any one of the first to seventh aspects, which is one of injection molding, injection compression molding, embossing molding and hot press molding. It is characterized in that the sheet in which the ribs and the bottom plate portion are integrated is formed by any of these methods, and then the electrode is applied by any of vapor deposition, sputtering, coating, or printing.

When the ribbed electrode according to any one of claims 1 to 7 is manufactured by the ribbed electrode manufacturing method according to claim 8, it is necessary to bond the rib to a substrate with an electrode as in the conventional case. Therefore, the manufacturing efficiency is high.

Moreover, in the method of manufacturing the ribbed electrode, it is possible to perform the alignment at the initial stage of manufacturing. As a result, the rib and the electrode can be accurately aligned, and the manufacturing cost can be reduced.

According to a ninth aspect of the present invention, there is provided the method for producing a ribbed electrode according to any one of the first to seventh aspects, wherein the film or plate on which the ribs are not formed is vapor-deposited, sputtered, It is characterized in that the electrode is applied by any method of coating or printing, and then the rib is formed by any method of emboss molding or hot press molding.

When the ribbed electrode according to any one of claims 1 to 7 is manufactured by the ribbed electrode manufacturing method according to claim 9, it is necessary to bond the rib to a substrate with an electrode as in the conventional case. Therefore, the manufacturing efficiency is high.

Moreover, in the method of manufacturing the ribbed electrode, it is possible to perform the alignment at the initial stage of manufacturing. As a result, the rib and the electrode can be accurately aligned, and the manufacturing cost can be reduced.

In addition, since the rib is formed after applying the electrode, the rib can be prevented from being damaged during the manufacturing process.

[0033]

1 shows a ribbed electrode 12 according to an embodiment of the present invention. This ribbed electrode 1
As shown in FIG. 1A, reference numeral 2 denotes a bottom plate portion 14 formed in a flat plate shape, and a rib 16 protruding from the bottom plate portion 14,
Has a sheet 18 that is integrally configured. At least one surface of the sheet 18 is provided with an electrode 20 having a desired pattern. The sheet 18 and the electrode 20 constitute the ribbed electrode 12 of the present invention. In the ribbed electrode 12 of the present invention, as will be described in detail later, the average (average height) of the heights c from the bottom portion 16B (root portion with the bottom plate portion 14) of the rib 16 to the top portion 16T (tip) is 50 μm. As described above, the aspect ratio is 1 or more, and the surface resistance of the electrode 20 is 1 × 10 ⁹ Ω or less.

In addition, in the ribbed electrode 12 of the present invention, when the value is shown as the "average" of the shape and physical properties of each member, it is obtained by measuring arbitrary 10 points of the target site. It means the average of the values.

The ribbed electrode 12 is, for example, a liquid crystal display (LCD) or a plasma display panel (P).
DP), an organic light emitting device (EL) display, an image display medium such as electronic paper using an image display material such as electrophoretic, thermal rewritable, electrochromy, and the like, which are arranged between two opposing substrates. It In this state, the rib 16 acts to keep the distance between the substrates (cell gap) constant. And the substrate and rib 1
The fluorescent substance and the image display material enclosed between 6 and the bottom plate portion 14 perform a predetermined behavior such as light emission and movement due to the potential difference between the electrodes and display an image. The rib 16
Also has a function of partitioning the gap between the substrates into a desired range depending on the type of image display medium.

As can be seen from FIG. 1 (B), the ribs 16 of the ribbed electrode 12 of this embodiment are arranged in stripes at regular intervals when viewed in the normal direction of the bottom plate portion 14.
A plurality is formed. Further, as can be seen from FIG. 1 (A), when the rib 16 is viewed in a cross section (a cross section in the normal direction of the bottom plate portion 14) orthogonal to its longitudinal direction or an end face, the bottom plate portion 1
It is formed in a trapezoidal shape so that it becomes gradually tapered as it is separated from 4.

The rib 16 of the ribbed electrode 12 of the present invention is
From the bottom portion 16B (the base portion with the bottom plate portion 14) to the top portion 16
Average height c to T (tip) (average height) is 50 μm
That is all. Further, the rib 16 has an aspect ratio of 1 or more. The aspect ratio means a ratio (c / d) of the width d and the height c at a position of 50% of the height c of the rib 16. Therefore, the larger the aspect ratio, the narrower the rib 16 is with respect to its height c.
Generally, in an image display medium, in a configuration in which ribs are arranged between two substrates to keep the distance between the substrates constant, a region where the ribs exist (a rib portion) and a region where the ribs do not exist between the substrates. The more freely controllable the volume ratio to the (rib-free portion), the wider the application as an image display medium.
In the present invention, the degree of freedom of the volume ratio is increased by forming the rib 16 having an average height of 50 μm or more and an aspect ratio of 1 or more.

As described above, the aspect ratio is 1
As described above, in the ribbed electrode 12 of the present embodiment, the rib 16 is relatively narrower than the rib 16 having the aspect ratio of less than 1.
Since is integrated with the bottom plate portion 14, it does not peel off accidentally. Further, as in the conventional structure, there is a high possibility that the rib will peel off in a structure in which an interface exists between the bottom plate having the electrode and the rib, but in the ribbed electrode 12 of the present embodiment, such an interface exists. Therefore, even if the surface resistance of the electrode is low (in other words, regardless of the surface resistance of the electrode), peeling of the rib 16 can be reliably prevented.

Then, in the ribbed electrode 12 of the present invention,
The surface resistance of the electrode 20 is 1 × 10 ⁹ Ω or less. Thus, by limiting the surface resistance of the electrode 20 to a certain value or less, the thickness and width of the electrode 20 are less limited,
For example, it is possible to make the electrode 20 thinner, and the degree of freedom of the electrode pattern is increased. Also, the energy efficiency is high.

In the present invention, the specific shape of the rib 16 is not particularly limited as long as the above conditions are satisfied. However, the average (average width) of the width b of the bottom of the rib 16 is 5 μm or more and 500 μm or less, the average of the gap f between the adjacent ribs 16 is 20 μm or more and 50000 μm or less, and the average of the height c of the rib 16 is Is 50 μm or more and 1000 μ
When it is m or less, the manufacturing suitability is excellent and the mechanical strength of the ribbed electrode 12 becomes high, which is preferable.

Further, as shown in FIG. 1 (A), the bottom plate portion 1
The width a of the rib 16 at a position where the height is 90% from 4 and the rib 1
When the ratio (a / b) of the bottom portion 6 to the width b of the bottom portion is 0.8 or less, the rib 16 has a bottom portion 1 in comparison with the vicinity of the top portion 16T.
Since 6B is relatively wide, the mechanical strength of the rib 16 is higher than that of a rib (rib having a substantially rectangular cross section) having the same width as the top portion 16T at an arbitrary height in the vertical direction. . Furthermore, when viewed in the normal direction of the bottom plate portion 14,
Since the area occupied by the top portions 16T (tips) of the ribs 16 is small, the so-called aperture ratio is large when the ribbed electrode 12 is used for applications such as a display, which is preferable.

The cross-sectional shape of the rib 16 is not limited to the trapezoidal shape as long as the above conditions are satisfied. For example,
The thing shown in FIGS. 2-4 can be mentioned.

In the rib 22 shown in FIG. 2, the width from the bottom portion 16B to the top portion 16T is constant from the middle portion to the middle portion, and the rib from the middle portion to the top portion is formed in a substantially triangular shape (may be trapezoidal) and is tapered.

The rib 32 shown in FIG. 3 has a tapered shape from the bottom portion 16B to the top portion 16T, and the side surface of the rib is curved so as to be convex outward, and is formed in a so-called bell shape.

The rib 42 shown in FIG. 4 has substantially the same outer shape as that shown in FIG. 1A in that it is formed in a substantially trapezoidal shape, but the inside of the rib 42 is hollowed out from the bottom plate portion 14 side. Thus, the rib 42 has a tunnel shape. In this rib 42, a hollowed portion (42N inside the rib 42)
Also, a fluorescent substance or an image display material can be enclosed.

In the ribbed electrode 12 of the present invention, the thickness e of the bottom plate portion 14 is not particularly limited. Particularly, in the ribbed electrode 12 of the present invention, since the bottom plate portion 14 and the rib 16 are integrated, the strength can be maintained even when the bottom plate portion 14 is thin, but from the viewpoint of preventing a decrease in handling, The average thickness of the bottom plate 14 is 5 μm or more, preferably 1
If it is 0 μm or more, good handling can be maintained. However, if the thickness is too thick, depending on the material to be used, the weight may become heavy, which may cause inconveniences such as impossibility of handling and deterioration of molding accuracy of the bottom plate portion 14. From the viewpoint of preventing such an inconvenience, the average thickness of the bottom plate portion 14 may be 3000 μm or less, preferably 500 μm or more.

The light transmittance of the ribbed electrode 12 of the present invention is not particularly limited, but if the total light transmittance is 60% or more, the back side can be visually recognized by the light transmitted through the ribbed electrode 12, for example. Will be possible. As an application of visually recognizing the back surface of the ribbed electrode 12 by the transmitted light, an optical touch panel can be given, for example. In addition, when a material such as a fluorescent substance or an image display material is put in the space surrounded by the rib 16 and the bottom plate portion 14 (rib absent portion), the tip of the top portion 16T of the rib 16 becomes invisible, which is preferable. An example of such an application is P
Examples include DP and electronic paper. Particularly, in the rib 42 having the shape shown in FIG. 4, when the fluorescent substance or the image display material is enclosed also in the inner side 42N of the rib 42, the rib 42
It is preferable to increase the light transmittance of the above and increase the visibility within the rib 42.

In the ribbed electrode 12 of the present invention, the shape of the rib 16 when viewed in the normal direction of the bottom plate portion 14 can be freely set according to the use of the image display medium in which the ribbed electrode 12 is used. It is possible and is not particularly limited. Above all, as shown in FIG.
Is formed into a stripe shape with a constant interval, a space surrounded by the ribs 16 can be formed, and the volume ratio of the rib-absent portions to the rib portions can be increased. When used as a product, the degree of freedom of use is increased. From the same viewpoint, FIG.
As shown in (C), the rib 16 can be formed in a lattice shape, a rhombus shape, a Hamicam shape (hexagonal shape), or the like. Particularly, when the ribs 16 are formed in a lattice shape or a honeycomb shape,
The mechanical strength of the rib 16 becomes higher. On the other hand, when the rib 16 is formed in a stripe shape, the volume ratio of the rib absent portion to the rib portion can be set larger. When the rib 16 has a lattice shape, a rhombus shape, a Hamicam shape, or the like, the lengths of the sides of the region surrounded by the rib 16 do not necessarily have to be equal. For example, when the ribs 16 are formed in a lattice shape, the region surrounded by the ribs 16 may be square or rectangular.

Further, as shown in FIGS. 6A and 6B, the ribs 16 are formed into a substantially pyramid shape (or may be a substantially conical shape) and are arranged so as to be scattered on the bottom plate portion 14. May be In this way, if the ribs 16 are scattered, it is possible to set the volume ratio between the rib-absent portion and the rib portion to a larger value. In this configuration, the interspersed pattern of the ribs 16 is an appropriate interspersed pattern in consideration of the use of the ribbed electrode 12, the volume ratio between the rib portion and the rib absent portion, the mechanical strength required for the rib 16, and the like. can do.

Even in the various shapes of the ribs shown in FIGS. 5 and 6, the sectional shape of these ribs is not limited to the trapezoidal shape shown in FIG. 1 (A), and for example, shown in FIGS. It can have various shapes.

In the ribbed electrode 12 of the present invention, the pattern of the electrode 20 is not particularly limited, but the average width g of the electrode 20 (average width) is 10 μm or more.
When it is formed in a stripe shape having an average gap of 0000 μm or less and the adjacent electrodes 20 of 10 μm or more and 10000 μm or less, for example, it is most suitable for an application requiring information for each address. In particular, when the ribs 16 have the above-described stripe shape, lattice shape, rhombus shape, or honeycomb shape, the regions between the substrates are partitioned by the ribs 16, and the desired electrode shape is formed in these partitioned regions. Since it is possible to cause a specific portion to emit light, it is possible to easily display information for each address. More specifically, for example, this ribbed electrode 12
If a substrate on which the electrode 20 and a stripe electrode in the vertical direction are provided is overlapped with the rib 16 side, the signal of the passive matrix can be given between the two substrates. The electrode 20 is not limited to the surface on the side opposite to the side where the rib 16 is formed, and the electrode 20 may be provided on the surface on the side where the rib 16 is formed.

Further, the relationship between the inter-rib gap f and the width g of the electrode 20 is not particularly limited, but if the width g of the electrode 20 is narrower than the width f of the inter-rib gap, a plurality of inter-rib gaps may be formed. The electrode 20 can be arranged. Of course, it is also possible to make the width g of the electrode 20 wider than the inter-rib gap f so that one electrode 20 is arranged commonly to a plurality of inter-rib gaps.

Materials for the bottom plate portion 14 and the ribs 16 used in the ribbed electrode 12 of the present invention are not particularly limited, but specific examples thereof include polycarbonate, polyester, polyamide, polyimide, polyurethane, polystyrene. , Thermoplastic resins such as polymethylmethacrylate, thermosetting resins in which blocking agents such as diisocyanate and triisocyanate are added, two-component rubber materials of silicone and butadiene, blend materials of thermoplastic resins and butadiene rubber, liquid crystal polyester resins And so on. Among these, polycarbonate resin and polyester resin are preferable in terms of manufacturability. Also,
If necessary, any additive such as a plasticizer, an ultraviolet absorber, an antioxidant, and conductive fine particles can be added to these materials.

The material of the electrode 20 of the ribbed electrode 12 of the present invention is not particularly limited, but for example,
Examples thereof include metals such as gold, silver, copper and aluminum, oxides such as indium tin oxide and titanium oxide, and conductive carbon. In particular, when the electrode 20 is made of a material having a high light transmittance and a high conductivity (a so-called transparent electrode), for example, in an image display medium provided with a backlight, the light of the backlight is easily transmitted. Therefore, it is preferable. Examples of the material of the transparent electrode include metal oxides such as tin oxide, indium oxide and indium tin oxide (ITO), and conductive polymers such as polyaniline. When the ribbed electrode 12 is applied to an image display medium provided with a back light, the total light transmittance thereof is preferably 60% or more as described above.

Next, a method of manufacturing the ribbed electrode 12 of the present invention will be described. As a method for manufacturing the ribbed electrode 12, a rib 16 is first formed on a film (or plate) on which the rib 16 is not formed, and then the electrode 20 is applied. It can be roughly classified into a manufacturing method (manufacturing method 2) in which the electrode 20 is first applied to the unformed film (or plate) and then the rib 16 is formed.

[Manufacturing Method 1] In Manufacturing Method 1, first, a film or plate in which the bottom plate portion 14 and the rib 16 are integrated is formed by injection molding, injection compression molding, embossing molding,
Molding is performed by any one method of hot press molding.

Injection molding is a molding method in which a resin is heated and melted and then injected into a mold to obtain a desired shape. Injection compression molding is a molding method that further improves the accuracy of transfer of a mold to a molded product by applying external pressure to a mold in injection molding. Embossing is a method in which a film is placed between a concave die and a blade, and the shape is narrowed by engaging the blade and the concave die. The hot press molding is a method of pressing a heated mold against a film or a plate, sandwiching the film with a heated roller, forming a mold on at least one of the rollers, and transferring this mold to the film.

Thus, the seat 18 in which the bottom plate portion 14 and the rib 16 are integrated is formed (see FIG. 1). The ribbed electrode of the present invention is manufactured by applying the electrode 20 to at least one surface of the sheet 18 by any method of vapor deposition, sputtering, coating, and printing.

This manufacturing method 1 can be manufactured by roll-to-roll or roll-to-plate, and it is not necessary as compared with the conventional method in which the rib and the substrate with the electrode need to be bonded. Therefore, the manufacturing efficiency is extremely high. Further, if the film or the like is aligned in the initial stage of manufacturing, it is possible to prevent the positional deviation between the rib 16 and the electrode 20, and to form these at desired positions. Also, the manufacturing cost is naturally low.

[Manufacturing Method 2] In Manufacturing Method 2, first, the electrode 20 is provided on one surface of an arbitrary film or plate on which the ribs 16 are not formed by any one of vapor deposition, sputtering, coating, and printing. These methods are excellent in terms of production efficiency. Next, the rib 16 is formed on at least one surface of the film by embossing or hot pressing. Similar to the manufacturing method 1, the manufacturing method 2 does not need to bond the rib and the substrate with the electrode, and therefore the manufacturing efficiency is extremely high. Further, the rib 16 and the electrode 20 can be easily aligned with each other, and the manufacturing cost is low. Further, in the manufacturing method 2, since the rib 16 is formed last after the electrode 20 is applied, the rib 16 is less damaged during manufacturing.

[0061]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

Example 1 In Example 1, a ribbed electrode was manufactured by the manufacturing method 1 described above.

First, polycarbonate resin (manufactured by Teijin Limited,
Injection molding machine (made by Yamashiro Seiki Co., Ltd.
SJ-15-40-PV), resin melting temperature 280 ° C
Injection-molded, the rib 16 has an average height of 200 μm, an average aspect ratio of 2.4, and an average width of the bottom portion 16B of the rib 16 is 1
A 5 cm square size sheet 18 (ribbed film) in which the ribs 16 in a lattice shape and the bottom plate portion 14 were integrated with each other at 00 μm and a gap between the ribs of 1 mm was molded. The average thickness of the bottom plate portion 14 was 30 μm.

An indium tin oxide (ITO) electrode was formed on the surface of the sheet 18 on which the ribs 16 were not formed by sputtering, with an average electrode width of 900 μm and an interelectrode gap of 100 μm.
The electrode 12 with ribs was obtained by applying a surface resistance of 300Ω to a stripe shape of m.

After leaving the ribbed electrodes 100 sheets in an environment chamber at a temperature of 80 ° C. and a humidity of 85% for 2 weeks, a peeling test of the ribs 16 and the bottom plate portion 14 was carried out with an adhesive tape, and the number of peeled sheets was determined. It was measured. Further, the time required for producing 100 ribbed electrodes 12 was divided by 100 to evaluate the production efficiency. Further, for 100 ribbed electrodes 12, the number of the ribs 16 and the electrodes 20 in which the positional deviation between the ribs 16 and the electrode 20 was 5% or more was measured. The results are shown in Table 1.

<Example 2> In Example 2 as well, a ribbed electrode was manufactured by the above manufacturing method 1.

First, using a bisphenol Z type polycarbonate resin (Mitsubishi Chemical Co., Iupilon Z300) as a raw material, an injection molding machine (Yamashiro Seiki Co., SJ-15-40-P).
V), injection at resin melting temperature 300 ° C, mold clamping force 10
The average height of the ribs 16 was 100 μm, the average aspect ratio was 2.2, and the ribs 16 were injection-compressed at 00 kN.
Average width of the bottom portion 16B of the rib is 50 μm, and inter-rib gap is 0.5
5 cm square sheet 18 (ribbed film) in which ribs 16 having a grid shape in mm and bottom plate portion 14 are integrated
Was molded. The average thickness of the bottom plate portion 14 was 10 μm.

An electrode 20 having a surface resistance of 300Ω is applied to the surface of the sheet 18 on which the rib 16 is not provided, as in the first embodiment.
A ribbed electrode 12 was obtained.

The same evaluation as in Example 1 was carried out on this ribbed electrode 12. The results are shown in Table 1.

Example 3 In Example 3, a ribbed electrode was manufactured by the manufacturing method 2 described above.

A carbon electrode was applied over the entire surface by die coater application to one surface of a 188 μm-thick A4 size polyester film (Lumirror manufactured by Toray Industries, Inc.). By embossing this film, stripe-shaped ribs 16 having an average height of 200 μm, an average width of the bottom of 200 μm, an aspect ratio of 1.8, and a gap of 2 mm are formed so that the ribs 16 project on the surface opposite to the surface of the electrode 20. Molded. The electrode of the portion corresponding to the rib 16 is cut by embossing,
Was also formed in a stripe shape having a gap similar to that of the rib. The surface resistance of this electrode 20 was 100Ω.

This ribbed electrode was evaluated in the same manner as in Example 1. The results are shown in Table 1.

<Example 4> In Example 4 as well, a ribbed electrode was manufactured by the manufacturing method 2 described above.

Thickness 188 μm, width 400 mm, length 20
A 0 m polyethylene naphthalate film roll (Kaladex, manufactured by Teijin Ltd.) was sputtered and etched in parallel with the longitudinal direction to give an average width of 900 μm and a gap of 1
A 00 μm stripe-shaped electrode 20 (ITO electrode) was applied. The surface resistance of this electrode 20 was 700Ω. This film roll with electrodes is roll-to-roll system,
An average height of 10 was obtained by hot pressing the heat roll for press at 220 ° C. and film feed at 10 mm / sec.
0 μm, bottom average width 100 μm, aspect ratio 1.
8 and a grid-shaped rib 16 having a gap of 50 μm was formed.
The film roll of the ribbed electrode thus obtained was cut into a size of 5 cm square and evaluated in the same manner as in Example 1. The results are shown in Table 1.

<Comparative Example 1> A glass plate having a thickness of 1 mm and a size of 5 cm was formed on one surface of which an electrode width was 900 μm and an interelectrode gap was 100.
The electrode 20 (ITO electrode) of μm is vapor-deposited, and the surface resistance 50
An electrode plate of 0Ω was obtained. After applying a photolithographic resist with a thickness of 200 μm on the entire surface having this electrode by a photolithography method, the excess resist is removed by a sandblasting method to obtain an average width of 100 μm, an average height of 200 μm, an aspect ratio of 1, and a rib interval. Ribs with a gap of 1 mm were formed. The electrode plate having the ribs which were not integrated was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2 A copper electrode was vapor-deposited on one surface of a glass epoxy plate having a thickness of 0.6 mm and a size of 5 cm and a width of 90 μm and a gap between the electrodes of 10 μm to obtain an electrode plate having a surface resistance of 500Ω. On the side having this electrode, using a printing ink (Dm300 manufactured by Asahi Chemical Research Co., Ltd.), screen printing (manufactured by Microtec, mT320-TVC) was performed 8 times to laminate, and an average height of 220 μm and an average aspect ratio. Ratio 0.9, average width of bottom 100 μm, gap between ribs 1
A rib having a lattice shape of mm was produced. The electrode plate having the ribs which were not integrated was evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0077]

[Table 1] As is clear from Table 1, the ribbed electrodes of the present invention of Examples 1 to 4 have high production efficiency because the ribs 16 are not peeled off even in a high temperature and high humidity environment or during long-term use.
There is no deviation between 0 and the rib 16.

On the other hand, in the ribbed electrodes of Comparative Example 1 and Comparative Example 2, the ribs peeled off depending on the environment and the time of use. In addition, the manufacturing efficiency is poor and the positional accuracy between the rib and the electrode is poor, which may result in extremely high cost.

[0079]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, the ribbed electrode has high reliability without peeling of the rib when the environment changes or is used for a long time, and the reproducibility of the position of the rib and the electrode is high. It is possible to provide a method of manufacturing a rib with an electrode having a high manufacturing cost and a low manufacturing cost.

[Brief description of drawings]

FIG. 1 shows a ribbed electrode of one embodiment of the present invention,
(A) is a cross-sectional view orthogonal to the longitudinal direction of the rib,
(B) is a plan view of the bottom plate portion viewed in the direction of the normal line.

FIG. 2 is a cross-sectional view showing a cross-sectional shape of the ribbed electrode of the present invention different from that shown in FIG.

3A and 3B of a ribbed electrode of the present invention.
It is sectional drawing which shows the cross-sectional shape different from.

FIG. 4 is a cross-sectional view showing a shape of the ribbed electrode of the present invention, which is different from FIGS. 1 (A), 2 and 3.

5A to 5C are plan views each showing a shape different from that in FIG. 1B when the ribbed electrode of the present invention is viewed in plan view.

6 (A) and FIG. 6 (B) are both FIG. 1 (B) and FIG. 5 (A) when the ribbed electrode of the present invention is viewed in plan.
It is a top view which shows a different shape from (C).

[Explanation of symbols]

12 Ribbed electrode 14 Bottom plate 16 ribs 18 sheets 20 electrodes 22 ribs 32 ribs 42 ribs a Width at the height 90% from the bottom plate of the rib b Width of bottom of rib c Rib height d Width at the height 50% from the bottom plate of the rib e Thickness of bottom plate f Width of rib gap Width of electrode

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsumi Nukata             Fuji Zero, 1600 Takematsu, Minamiashigara City, Kanagawa Prefecture             X Co., Ltd. F-term (reference) 5C094 AA31 AA43 AA44 AA48 BA31                       BA43 CA19 DA11 EA04 EC03                       FA04 FB01 FB12 FB15 JA01                       JA05 JA08 JA11                 5G435 AA14 AA17 BB06 BB12 CC09                       HH02 HH12 HH14 KK05

Claims (9)

[Claims] 1. A sheet having a bottom plate portion and a rib projecting from the bottom plate portion and integrally formed with the bottom plate portion; and a sheet disposed on at least one surface of the sheet and having a surface resistance of 1
A ribbed electrode having an electrode of × 10 ⁹ Ω or less, wherein the rib is at a position where the average height from the bottom plate portion is 50 μm or more and the height is 50% in a cross section in the direction normal to the bottom plate portion. The electrode with ribs, wherein the ratio (c / d) of the width d and the height c of the electrode is 1 or more. 2. The ribbed electrode according to claim 1, wherein the rib is formed so as to have a stripe shape or a lattice shape when viewed in a direction normal to the bottom plate portion. 3. The rib has a ratio (a / b) of a width a at a position 90% in height from the bottom plate to a width b of the bottom of the rib in a cross section in the direction normal to the bottom plate. The ribbed electrode according to claim 1 or 2, wherein the number is 8 or less. 4. In a cross section orthogonal to the longitudinal direction of the rib, the average width of the bottom of the rib is 5 μm or more and 500 μm or less, and the average spacing between adjacent ribs is 20 μm or more 50.
The ribbed electrode according to claim 3, wherein the rib has an average height of 50 µm or more and an average rib height of 50 µm or more and 1000 µm or less. 5. The ribbed electrode according to any one of claims 1 to 4, wherein the total light transmittance is 60% or more. 6. The bottom plate portion has an average thickness of 5 μm or more 30
The ribbed electrode according to any one of claims 1 to 5, wherein the electrode has a thickness of 00 m or less. 7. The electrode is formed in a stripe shape when viewed in a direction normal to a bottom plate portion, and has an average width of 10 μm or more and 10000 μm in a cross section orthogonal to a longitudinal direction of the electrode.
m or less, the average distance between adjacent electrodes is 10 μm or more and 10
The ribbed electrode according to claim 1, wherein the ribbed electrode has a thickness of 000 μm or less. 8. The method for manufacturing a ribbed electrode according to claim 1, wherein the rib is formed by any one of injection molding, injection compression molding, embossing molding, and hot press molding. A method for producing a ribbed electrode, characterized in that the sheet integrated with the bottom plate portion is formed, and then the electrode is applied by any one of vapor deposition, sputtering, coating, and printing. 9. The method for producing a ribbed electrode according to claim 1, wherein the film or plate on which the ribs are not formed is any one of vapor deposition, sputtering, coating, and printing. A method for producing a ribbed electrode, wherein the electrode is applied by a method, and then the rib is formed by any one of embossing molding and hot press molding.