CN1705907A - Manufacturing method of electrophoretic display device - Google Patents

Abstract

An electric display device is manufactured by a method comprising the steps of, in the electric display device, a dispersion liquid (40) comprising at least a dispersion medium and electrophoretic particles (50) is provided on a substrate (10), provided on the substrate In the space defined by the upper partition (20) and the sealing film (30) arranged on the upper end (90) of the partition, the method includes: in the state where the dispersion liquid is filled between adjacent partitions, the dispersion A step of providing a sealing film precursor (120) on the exposed surface of the liquid and on at least a part of the upper end (90) of the partition wall (20), the sealing film precursor comprising a polymerizable compound and supported by a support member (130), and placing the A step in which the polymerizable compound is polymerized to form a sealing film (30).

Description

Manufacturing method of electrophoretic display device

technical field

The invention relates to a manufacturing method of an electric display device reflecting the distribution state of an electrophoretic particle group in a certain display state.

Background technique

When an electric field is provided to the charged electrophoretic particles in an insulating liquid, the electrophoretic particles move under the action of electrophoresis. In recent years, electrophoretic displays (EPDs) utilizing this electrophoretic phenomenon have been widely developed. Compared with liquid crystal display devices, EPDs have advantages such as high display contrast, viewing angle independence, display state memory, flexible device structure, and no backlight or polarizer is required.

As described above, the electrophoretic particles are dispersed in the liquid, so that the electrophoretic particles easily move in the direction of the substrate surface by diffusion or the like. Such movement causes deterioration of displayed images, so that it is necessary to limit the active area of the microparticles (electrophoretic particles). One way to limit the active area of particles is to form numerous tiny hollow spaces on the substrate used for the device, and to confine the electrophoretic particles and the insulating liquid. If such confinement is fully realized, the region of particle movement can be restricted to the tiny hollow spaces in which electrophoretic particles are confined.

Such a method is proposed in Japanese Unexamined Published Patent Application No. 2000-342672 (eg, FIG. 26 ), in which a state in which electrophoretic particles, an insulating liquid, etc. are confined is created in a hollow space. According to this Japanese publication (unexamined) particle confinement method, first, partition walls are formed on a substrate to define a plurality of cells. In each defined cell, a liquid mixture (dispersion system) including electrophoretic particles is filled by an inkjet method. On the dispersion, a sealing material is employed and cured to a state in which the dispersion is confined. Thereafter, the cured sealing material provided on the substrate having the partition walls and the opposing substrate are bonded to each other to form a display device.

In addition, this Japanese publication also discloses a method of filling a mixture of a dispersion system and a sealing material in each cell by an inkjet method. In this case, if the specific gravity of the sealing material is smaller than that of the dispersed system, and they are not compatible with each other, the sealing material and the dispersed system are separated from each other (phases). As a result, a state in which a sealing material is formed on the dispersion system is finally brought about. In this state, the sealing material solidifies to form a state where the dispersed system is restricted. Thereafter, the cured sealing material provided on the substrate on which the partition walls are formed and the opposing substrate are bonded to each other to form a display device.

However, the manufacturing method of this Japanese publication (JP2000-343672) may cause the following problems.

First, there is a problem that it is difficult to use ultraviolet (UV) polymerizable materials typified by (meth)acrylate-based monomers. These materials can be used as raw materials for soft sealing films required to impart flexibility to the resulting display device. In addition, these materials are inexpensive, thereby reducing the cost of the display device. The aforementioned UV polymerizable materials are typically polymerized by oxygen-inhibited free-radical polymerization. Thus, in the case of performing sealing material polymerization in a state where the sealing material is exposed to ambient air, as described in this Japanese publication, it is difficult to utilize a UV polymerizable material. If these materials are used, special curing equipment that removes oxygen from the polymerization environment is required.

Second, there is a problem that the specific gravity of the sealing material is limited, thereby narrowing the selection range of the sealing film material. In this Japanese publication, the specific gravity of the sealing material is required to be smaller than that of the dispersion system. For example, in the case of an isoparaffin-based solvent that is often used as a dispersion medium, the specific gravity of the sealing material is required to be less than 1. However, most curable materials have a specific gravity greater than one. For this reason, the choice of materials becomes narrower.

Third, there is a problem that it is difficult to uniformly arrange the sealing material over a wide range. This is attributable to the generation of inhomogeneity of the sealing material layer exposed to the surrounding air. One cause of non-uniformity is the droplet (formation) phenomenon of the sealing material. Inhomogeneity is often difficult to avoid. In addition, in larger-sized devices, the occurrence of non-uniformity is more pronounced.

Contents of the invention

An object of the present invention is to provide a method of manufacturing an electrical display device in which the above-mentioned problems are solved.

A specific object of the present invention is to provide an electric display device capable of forming an inexpensive and soft sealing film by using a UV polymerizable compound polymerized by radical polymerization as a raw material of a sealing film without limiting the specific gravity of the polymerizable compound. Manufacturing method.

According to the first aspect of the present invention, there is provided a method for manufacturing an electric display device. In the electric display device, a dispersion liquid containing at least a dispersion medium and electrophoretic particles is provided on a substrate, a partition wall provided on the substrate, and Provided in the space defined by the sealing film on the upper end of the bulkhead, the method includes:

In the state where the dispersion liquid is filled between the adjacent partitions, on the exposed surface of the dispersion liquid and on at least a part of the upper ends of the partition walls, the step of providing a sealing film matrix comprising a polymerizable compound supported by a support member, and

The step of polymerizing a polymerizable compound to form a sealing film.

According to the second aspect of the present invention, there is provided a method for manufacturing an electric display device. In the electric display device, a dispersion liquid containing at least a dispersion medium and electrophoretic particles is provided on a substrate, on the substrate and at its upper end. In the space defined by the partition wall provided with the adhesive film at the part and the sealing film provided on the upper end of the partition wall, the method includes:

the step of providing an adhesive film precursor comprising a polymerizable compound on the upper end of the partition wall,

the step of providing a sealing film precursor comprising a polymerizable compound on the exposed surface of the dispersion and at least on the surface of the adhesive film at the upper end of the partition wall, and

A step of polymerizing a polymerizable compound to integrate the sealing film and the adhesive film in a state where the adhesive film precursor is in contact with the sealing film precursor.

By using the production method according to the present invention, it is possible to provide an electric display device having an inexpensive and flexible sealing film independent of the specific gravity of the polymerizable compound. In addition, good adhesion between the sealing film and the partition can be ensured.

These and other objects, features and advantages of the present invention will become more apparent from the following description of preferred embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a schematic cross-sectional view illustrating one embodiment of an electrical display device manufactured by the method of the present invention.

FIG. 2 is an enlarged cross-sectional view of the device shown in FIG. 1 .

The schematic diagrams shown in Figures 3, 4 and 5 illustrate a method of manufacturing a display device according to the invention.

6, 7, 8 and 9 are enlarged cross-sectional views of the display device, showing the vicinity of the partition wall 20. As shown in FIG.

The schematic cross-sectional view shown in Fig. 10 illustrates the method of manufacturing the display device of the present invention.

11 and 12 are schematic cross-sectional views illustrating another embodiment of an electric display device manufactured by the method of the present invention, respectively.

13 , 14 , 15 , 16 and 17 are respectively enlarged cross-sectional views of the display device, showing the vicinity of the partition wall 20 .

Figure 18 is a schematic cross-sectional view illustrating another embodiment of an electrical display device manufactured by the method of the present invention.

19 to 28 are schematic cross-sectional views illustrating the method of manufacturing the display device of the present invention.

Figure 29 is a schematic cross-sectional view illustrating another embodiment of an electrical display device manufactured by the method of the present invention.

Detailed ways

Next, a method of manufacturing an electrical display device according to the present invention will be described in more detail.

The manufacturing method according to the first aspect of the present invention comprises:

A method of manufacturing an electric display device, in which a dispersion liquid containing at least a dispersion medium and electrophoretic particles is provided on a substrate, a partition provided on the substrate, and a partition provided on the upper end of the partition In the space defined by the sealing film, wherein the dispersion liquid is filled between adjacent partitions in such a state that the sealing film matrix containing the polymerizable compound is in contact with the exposed surface of the dispersion liquid and at least a part of the upper end of the partition wall, and sealing The sealing film is formed by polymerizing the polymerizable compound in a state where the film matrix is supported by the planar sealing member.

The manufacturing method according to the first aspect of the present invention may include the following specific embodiments (a) to (1):

(a) the support element has a surface having an affinity for the sealing membrane matrix,

(b) the dispersion and the sealing film matrix are incompatible with each other,

(c) the polymerizable compound is a photopolymerizable compound,

(d) photopolymerizable compounds comprising photopolymerizable monomers or oligomers,

(e) photopolymerizable monomer is 1,4-butanediol diglycidyl ether diacrylate,

(f) photopolymerizable oligomer is polytetramethylene ether glycol=two (2-maleimide acetate),

(g) the photopolymerizable monomer is a fluorine-containing acrylate,

(h) photopolymerizable monomers or oligomers include at least two monomers or oligomers, at least one of which is a fluorine-containing acrylate,

(i) photopolymerizable monomers or oligomers comprise at least two monomers or oligomers, at least one of which is polytetramethylene ether glycol=bis(2-maleimide acetate),

(j) after completing the polymerization, removing the support element from the sealing membrane,

(k) on the sealing membrane, after removal of the supporting element, another membrane is provided, and

(l) The supporting member and the sealing film are transparent.

The manufacturing method according to the second aspect of the present invention includes a manufacturing method of an electric display device, in which a dispersion liquid containing at least a dispersion medium and electrophoretic particles is provided on a substrate, provided on the substrate, and In the space defined by the partition wall provided with the adhesive film at its upper end and the sealing film provided on the upper end portion of the partition; wherein the sealing film precursor containing the polymerizable compound and the adhesive film precursor containing the polymerizable compound are polymerized forming a sealing film; providing an adhesive film matrix layer on at least the upper end portion of the partition; and performing polymerization in a state where the sealing film matrix layer contacts the exposed surface of the dispersion liquid and at least the sealing film matrix layer, wherein the dispersion liquid fills the adjacent between next door.

The manufacturing method according to the second aspect of the present invention may include the following specific embodiments (a) to (t):

(a) the polymerizable compound has at least one group selected from -O-, _-CH2 -O-, -OH and _-CF2- ;

(b) the polymerizable compound has a polyethylene glycol structure,

(c) the polymerizable compound is a photopolymerizable compound,

(d) The photopolymerizable monomer is 1,4-butanediol diglycidyl ether diacrylate,

(e) the partition walls comprise polymers of polymerizable compounds,

(f) The photopolymerizable monomer is a fluorine-containing acrylate,

(g) photopolymerizable monomers or oligomers comprising at least two monomers or oligomers, at least one of which is a fluorine-containing acrylate,

(h) photopolymerizable monomers or oligomers comprise at least two monomers or oligomers, at least one of which is polytetramethylene ether glycol=bis(2-maleimide acetate),

(i) the dispersion and the sealing film matrix are incompatible with each other,

(j) prior to polymerization, an adhesive film precursor layer is provided on at least the upper end of the partition wall,

(k) providing an adhesive film precursor layer by transferring the polymerizable compound from the substrate coated with the polymerizable compound onto the upper ends of the partition walls,

(k) disposing the adhesive film precursor layer on the partition wall by coating a polymerizable compound on the surface of the substrate on which the partition wall is formed,

(m) the partition walls comprise polymers of polymerizable compounds,

(n) polymerizing in a state where the adhesive film matrix layer is supported by a planar support element,

(o) removing the support element after polymerization,

(p) forming a sealing film matrix layer by spraying a volatile liquid containing a polymerizable compound dissolved therein onto the exposed surface of the dispersion liquid and the adhesive film matrix layer, and volatilizing the volatile liquid,

(q) forming a sealing film precursor layer by applying the sealing film precursor to the exposed surface of the dispersion and the adhesive film precursor layer,

(r) the sealing film matrix layer comprises two layers,

(s) forming one of the two layers constituting the matrix layer of the sealing film by coating a polymerizable compound, and

(t) Of the two layers constituting the matrix layer of the sealing film, the layer which is in contact with the dispersion liquid exposed surface contains a polymer of the polymerizable compound used in (s).

(1) Hereinafter, an embodiment of the manufacturing method according to the first aspect of the present invention will be specifically described with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a display device manufactured by a first embodiment of a manufacturing method according to a first aspect of the present invention.

1, the display device includes a substrate 10, a partition wall 20 arranged to surround and define pixels, a sealing film 30, a dispersion medium 40, an electrophoretic compound 50, a first electrode 70 arranged at each pixel, and a first electrode 70 arranged at each pixel. The second electrode at the pixel, and the switching device 80 provided relative to each pixel, such as TFT (Thin Film Transistor). It can be seen from FIG. 1 that other structural elements of the display device, such as an electrical signal applying device for applying an electrical signal between electrodes, are omitted.

The display device manufactured by the manufacturing method of the present invention reflects the distribution state of the electrophoretic particles 50 in the display state.

More specifically, in the region indicated by A, a distribution state in which the electrophoretic particles 50 are gathered on the side surfaces of the partition walls 20 is shown. When the region A is viewed from the sealing film 30 side of the display device, if the surface of the first electrode 60 is white, the region A appears white. On the other hand, in the region indicated by B, a distribution state in which the electrophoretic particles 50 are dispersed in the direction of the substrate surface is shown. When the region B is viewed from the sealing film 30 side, the region B appears to take on the color of the electrophoretic particles 50 (black in this embodiment).

In order to change the display state, the electrophoretic particles 50 move on the substrate so as to change the distribution state. For example, electrophoretic movement and transfer of the electrophoretic particles 50 may be performed by applying an electrical signal between the first and second electrodes. In the present invention, the method of moving the electrophoretic particles on the substrate required when changing the display state is not particularly limited. For example, electrophoretic particles move on the substrate by using the dielectric migration force of the dispersion medium or electrofluid flow.

In the above description, the color of the electrophoretic particles is black, and the color of the surface of the first electrode is white, but not limited thereto. For example, by appropriately changing the color of the surface of the first electrode to red, green, blue, etc., color display can be realized.

In FIG. 1 , an electrode system (structure) is provided on the substrate 10 side. The electric field generated by the electrode system causes the electrophoretic particles to move extremely along the plane of the sealing membrane. However, in the present invention, as long as a desired display state can be produced, an electrode structure in which the electrophoretic particles are greatly moved along the vertical direction of the sealing film can also be used.

The sealing film 30 shown in FIG. 1 has such a cross-sectional structure (shape) that it is curved toward the substrate side, but may also have a planar structure or a structure that is curved toward the direction opposite to the substrate, as shown in FIGS. 7 and 9. indicated in respectively.

It is sufficient that the sealing film is bonded to at least a part of the upper end of the partition wall, but it is preferred that the sealing film is bonded to the entire upper end face of the partition wall, as shown for example in Figures 6, 7 and 9, more preferably not only to the partition wall over the entire surface of the upper end, as shown for example in FIGS. 2 and 8 . This is because the adhesiveness between the sealing film and the partition wall increases as the bonding area between the sealing film and the partition wall increases. FIG. 2 schematically shows a state in which the sealing film bent toward the substrate 10 side is adhered to the upper end portion 90 and a part of the side portions 100 and 110 of the partition wall 20 .

Next, an embodiment of a method of manufacturing the display device shown in FIG. 1 will be described with reference to process diagrams of FIGS. 3-5.

<step 1>

FIG. 3 schematically shows step 1, which is a step until the partition walls 20 are formed.

First, the switching device 80 is formed on the substrate 10, and then covered with an insulating layer. In the insulating layer, a contact hole 160 is formed. After that, a resist pattern for scattering incident light is formed on the insulating layer, and a first electrode 60 (for example, of aluminum having high light reflectivity) is formed on the resist pattern so as to communicate with the switching device 80 through the contact hole 160. connected. If the first electrode 60 has high light reflectivity, it may also function as a light reflection/scattering layer.

The first electrode 60 is covered with an insulating light scattering layer. On the light scattering layer, the second electrode 70 and the partition wall 20 are formed. The partition walls may be formed by any method as long as the desired partition walls can be formed. For example, the partition walls can be formed by a known photolithography process.

After the partition walls are formed, the insulating light-scattering layer provided on the first electrode and the surface of the second electrode may be covered.

<Step 2>

FIG. 4 schematically shows Step 2, which is a step until the state before the sealing film precursor is polymerized by disposing the sealing film precursor layer containing a polymerizable compound at a desired position is produced.

In this state, the sealing film matrix layer 120 containing a polymerizable compound is disposed between the support member 130 for supporting the sealing film matrix layer 120 and the substrate 10 on which at least the electrophoretic particles 50 and the dispersion medium 40 It is arranged between adjacent partition walls 20 .

In addition, in the present embodiment, the sealing film mother layer 120 is in contact with the exposed surface 140 of the dispersion medium filled between adjacent partition walls 20 and at least a part of the upper end portion 90 of the partition walls 20 .

As described above, in the present embodiment, the sealing film matrix layer 120 containing a polymerizable compound is supported by the supporting member 130 so that even if the specific gravity of the sealing film matrix is greater than that of the dispersion medium, the sealing film matrix does not sink into the dispersion medium bottom of the layer. In other words, the specific gravity of the sealing film matrix is not limited. In addition, since the sealing film matrix layer 120 is supported by a supporting member, it does not directly contact the surrounding air, so that a UV polymerizable material polymerized by radical polymerization can be used as a polymerizable compound constituting the sealing film matrix. Furthermore, the formation of droplets can be avoided so that, for example, the thickness of the sealing film can be kept uniform over a large area.

If the above-mentioned structure of each element is realized, there is no limitation on the method of disposing the sealing film matrix, the dispersion medium, and the like. For example, after a mixture (dispersion liquid) containing a dispersion medium and electrophoretic particles is filled between adjacent partition walls, a support member provided with a sealing film matrix layer can be formed on a substrate on which partition walls are formed. Alternatively, after disposing the electrophoretic particles between adjacent partition walls, a support member provided with a sealing film matrix layer is provided opposite to the substrate on which the partition walls are formed with a predetermined interval therebetween, and the dispersion medium is injected through the interval. Afterwards, the supporting member may be pressed against the substrate on which the partition walls are formed.

<Step 3>

4 and 5 schematically show step 3, which is a step of polymerizing the sealing film matrix constituting the sealing film matrix layer 120 until the sealing film is formed.

Polymerization of the sealing film precursor is characterized in that it is performed in a state where the sealing film precursor layer 120 is supported by the supporting member 130, as shown in FIG. 4 . By performing polymerization in this state, the sealing film 30 is formed as shown in FIG. 5 .

The polymerization method can be selected according to the kind and nature of the polymerizable compound constituting the matrix of the sealing film. For example, if the polymerizable compound is a UV polymerizable material, the polymerisation can be performed by UV radiation.

The supporting element 130 can also be removed as required. In this case, the display device shown in FIG. 1 was formed. After the support member 130 is removed, another thin film may be formed on the sealing film.

In the above description, the connection with the electric signal applying device and other steps are omitted.

(2) Next, referring to Figs. 12-18, an embodiment of the manufacturing method according to the second aspect of the present invention will be specifically described.

A schematic cross-sectional view shown in FIG. 12 shows an embodiment of a display device manufactured by the manufacturing method of this embodiment.

Referring to FIG. 12 , the display device includes a substrate 10, a partition wall 20 disposed to surround and define pixels, a sealing film 30 formed by polymerizing a sealing film precursor comprising a polymerizable compound as described below, a dispersion medium 40, an electrophoretic compound 50. The first electrode 70 arranged at each pixel, the second electrode arranged at each pixel, a switching device 80 such as a TFT (thin film transistor) arranged relative to each pixel, and used to strengthen the partition wall 20 and seal Adhesive film 90 for bonding between films 30 . Before the polymerization, the adhesive film is formed by polymerizing the adhesive film precursor including the polymerizable compound provided on the upper end portion of the partition wall 20 . During the polymerization, the adhesive film and the sealing film are connected and bonded to each other. It can be seen from FIG. 12 that other structural elements of the display device, such as an electrical signal applying device for applying an electrical signal between electrodes, are omitted.

The display device manufactured by the manufacturing method of the present invention reflects the distribution state of the electrophoretic particles 50 in the display state.

More specifically, in the region indicated by A in FIG. 12 , a distribution state in which the electrophoretic particles 50 gather on the side of the partition wall 20 is shown. When the region A is viewed from the sealing film 30 side of the display device, if the surface of the first electrode 60 is white, the region A appears white. On the other hand, in the region indicated by B in FIG. 12, a distribution state in which the electrophoretic particles 50 are dispersed in the direction of the substrate surface is shown. When the region B is viewed from the side of the sealing film 30 , the region B appears to take on the color of the electrophoretic particles 50 .

The method of changing the display state is the same as the method according to the embodiment of the first aspect of the present invention.

In FIG. 12, the electrode system (structure) is provided on the substrate 10 side. The electric field generated by the electrode system causes the electrophoretic particles to move greatly along the plane of the sealing membrane. However, in the present embodiment, an electrode structure in which electrophoretic particles are greatly moved in the vertical direction of the sealing film may also be employed as long as a desired display state is produced.

The sealing film 30 shown in FIG. 12 has a cross-sectional structure (shape) that is curved toward the substrate side, but may also have a planar structure or a structure that is curved toward the side opposite to the substrate, as shown in FIGS. 15 and 16 . indicated separately.

It is sufficient that the sealing film is bonded to at least a part of the upper end of the partition, but preferably the sealing film is bonded to the entire surface of the upper end of the partition, as shown for example in Figures 14, 15 and 17, more preferably not only to the partition over the entire surface of the upper end, as shown, for example, in FIGS. 13 and 16 . This is because the adhesiveness between the sealing film and the partition wall increases as the bonding area between the sealing film and the partition wall increases. FIG. 13 schematically shows a state where the sealing film bent toward the substrate 10 side is adhered to the upper end portion 90 and a part of the side portions 100 and 110 of the partition wall 20 .

In this embodiment, at least the upper end portion of the partition wall is constituted by the adhesive film matrix layer before polymerization. In FIGS. 12-17, only the upper end portion is constituted by the adhesive film matrix layer. However, in this embodiment, the polymerizable compound may be provided not only on the upper end but also on the entire surface of the partition wall side, followed by polymerization to form the adhesive film 90 as shown in FIG. 18 .

Next, an embodiment of a method of manufacturing the display device shown in FIG. 12 will be described with reference to process diagrams of FIGS. 19-26.

<step 1>

FIG. 19 schematically illustrates step 1, which is a step until the partition wall 20 is formed.

First, the switching device 80 is formed on the substrate 10, and then covered with an insulating layer. In the insulating layer, a contact hole 160 is formed. After that, a resist pattern for scattering incident light is formed on the insulating layer, and a first electrode 60 (for example, of aluminum having high light reflectivity) is formed on the resist pattern so as to communicate with the switching device 80 through the contact hole 160. connected. If the first electrode 60 has high light reflectivity, it may also function as a light reflection/scattering layer.

The first electrode 60 is covered with an insulating light scattering layer. On the light scattering layer, the second electrode 70 and the partition wall 20 are formed. The partition walls may be formed by any method as long as the desired partition walls can be formed. For example, the partition walls can be formed by a known photolithography process.

<Step 2>

20-22 schematically illustrate Step 2, which is a step up to providing an adhesive film matrix layer containing polymerizable particles at least at the upper end of the partition wall.

The polymerizable compound used in this step is preferably the same as the precursor constituting the sealing film described below.

A specific example of this step will be described.

First, a substrate coated with a polymerizable compound is prepared. The coated surface of the substrate was brought into contact with the upper end of the partition wall prepared in Step 1, as shown in FIG. 20 . Referring to FIG. 20 , reference numeral 190 denotes a polymerizable compound coated on a substrate 180 . After that, the substrate 180 is removed from the partition wall 20, so that the polymerizable compound 190 is transferred from the substrate 180 to the upper end portion of the partition wall 20, as shown in FIG. 21 . Referring to FIG. 21 , reference numeral 200 denotes an adhesive film matrix layer including a polymerizable compound transferred onto the upper end portion of the partition wall 20 .

In the present embodiment, the polymerizable compound 200 may also be provided on the entire surface of the side portion of the partition wall 20 and at the upper end portion, as shown in FIG. 22 . The provision of the polymerizable compound can be performed by, for example, coating or absorbing the polymerizable compound.

In the case where the partition wall is formed of a polymerizable compound constituting the sealing film matrix, the polymerizable compound is already provided at the upper end of the partition wall so that it can be omitted or provided as needed (by, for example, transfer or coating).

The polymerizable compound preferably has an affinity for the partition wall. This is because not only disposing the polymerizable compound at the upper end portion of the partition wall is easy to perform, but also because the adhesiveness between the polymer of the polymerizable compound and the partition wall is good after polymerization of the polymerizable compound.

When necessary, treatment may be performed to enhance the adhesiveness of the polymer of the polymerizable compound provided at least at the upper end of the partition wall to the upper end of the partition wall. Adhesiveness is improved by, for example, forming minute unevenness at the upper end of the partition wall by, for example, dry etching. Alternatively, the polymerizable compound may be chemically fixed to at least the upper end of the partition wall using a functional group (such as -OH or -COOH) formed by subjecting at least the upper end of the partition wall to ozone treatment. In addition, it is also possible to partially polymerize the adhesive film matrix layer.

<Step 3>

23 and 24 schematically illustrate Step 3, which is a step of producing a state before polymerizing the sealing film matrix by disposing a sealing film matrix layer containing a polymerizable compound at a desired position.

In this state, in this embodiment, the sealing film matrix layer 120 is in contact with the exposed surface 140 of the dispersion medium filled between adjacent partition walls 20, and at least a part of the upper end of the partition walls 20, as shown in FIG. 23 Show.

As described above, in the present embodiment, at least the upper end portion of the partition wall is constituted by the adhesive film matrix layer 200 containing a polymerizable compound. For this reason, when the polymerization process described below is performed, the polymer of the sealing film precursor and the polymer of the adhesive film precursor (ie, the adhesive film) contact each other, so that the adhesiveness between them can be enhanced.

The polymerizable compound used in this embodiment is characterized in that it is insoluble in a (mixed) dispersion medium. For this reason, when the sealing film matrix layer is provided on the dispersion medium in this embodiment, a part of the dispersion medium between the sealing film matrix and the partition walls flows outside the structure. Not only the sealing film matrix layer but also the polymerizable compound constituting the adhesive film matrix dispersed in the upper end portion accelerates the outflow phenomenon of the dispersion medium. Even if a small portion of the sealing film matrix layer is in contact with the upper end of the partition wall, they come into contact with each other like a closed zipper. At this time, the outflow phenomenon of the dispersion medium is further accelerated. As a result, the contact of the sealing film matrix layer and the partition wall required to ensure the adhesion between the sealing film and the partition wall is reliably achieved even in a dispersion medium.

In this step, the sealing film matrix layer 120 containing the polymerizable compound may be supported by a supporting member 130 as shown in FIG. 24 so that the sealing film matrix does not sink even if the specific gravity of the sealing film matrix is greater than that of the dispersion medium to the bottom of the dispersion medium layer. In other words, there is no limitation on the specific gravity of the sealing film matrix. In addition, since the sealing film matrix layer 120 is supported by a supporting member, it does not directly contact the surrounding air, thereby using a UV polymerizable material polymerized by radical polymerization as a polymerizable compound constituting the sealing film matrix. Furthermore, the formation of droplets can be avoided, so that, for example, the thickness of the sealing film can be made uniform over a large area.

If the above-mentioned structure of each element is realized, there is no limitation on the method of disposing the sealing film matrix, the dispersion medium, and the like. For example, the polymerizable compound or a volatile liquid in which the polymerizable compound is dissolved may be finely sprayed onto the upper end portion (exposed surface) of the dispersion medium. The polymerizable compound used in this embodiment is insoluble in the dispersion, so that the polymerizable compound locally becomes a thin film at the exposed surface of the dispersion. This phenomenon tends to occur when the polymerizable compound has an -OH group or -O-group. As described later, the polymerizable compound in this embodiment has such a group in its structure.

Additionally, a polymerizable compound can be applied to the exposed surface and the adhesive film precursor layer.

The adhesive film base layer may have a laminated structure including two or more layers, if necessary. For example, a second layer of polymerizable compound may be disposed on the first layer in contact with the exposed surface of the dispersion. For example, the second layer can be prepared by coating the first layer with a polymerizable compound, without the use of the support elements described above. The first layer can be prepared by the above-mentioned fine spraying method. The first layer may be formed of a polymerizable compound or a polymer of a polymerizable compound.

On the other hand, after a mixture (dispersion liquid) containing a dispersion medium and electrophoretic particles is filled between adjacent partition walls, a support member provided with a sealing film matrix layer can be formed on a substrate formed with partition walls. Alternatively, after the electrophoretic particles are disposed between adjacent partition walls, a support member provided with a sealing film mother layer is provided opposite to the substrate on which the partition walls are formed with a predetermined interval therebetween, and the dispersion medium is injected through the interval. Afterwards, the supporting member may be pressed against the substrate on which the partition walls are formed.

<Step 4>

25 and 26 schematically illustrate step 4, step 4 is a step until the sealing film matrix forming the sealing film matrix layer 120 is polymerized, and the adhesive film matrix forming the adhesive film matrix layer 200 is arranged on the upper end of the partition wall.

By performing polymerization of the sealing film precursor as shown in FIGS. 23 and 24 , the sealing film 30 is formed as shown in FIGS. 25 and 26 . At the same time, the adhesive film precursor is also polymerized to form the adhesive film 90 .

By polymerization in this step, the polymerizable compound constituting the matrix layer of the adhesive film provided at least at the upper end of the partition wall and the polymerizable compound constituting the matrix of the sealing film adhere to each other, thereby enhancing the adhesion between the sealing film and the adhesive film. connection. On the other hand, the adhesive film is bonded to the upper end portion of the partition wall as described above. Therefore, the adhesiveness of the sealing film prepared in this step to the partition wall can be ensured.

The polymerization method can be selected according to the kind and nature of the polymerizable compound constituting the matrix of the sealing film. For example, if the polymerizable compound is a UV polymerizable material, the polymerisation can be performed by UV radiation.

In the case of the display device shown in FIG. 26, the supporting element 130 can also be eliminated. In this case, the display device shown in FIG. 25 was formed. After removing the supporting member 130, another thin film may be formed on the sealing film. Likewise, another thin film may also be formed on the sealing film of the display device shown in FIG. 25 .

In the above description, the connection with the electric signal applying device and other steps are omitted.

(3) In the following, materials and the like applicable to the embodiments of the production methods according to the first and second aspects of the present invention will be specifically described.

The dispersion medium used in the present invention is an insulating liquid. An organic solvent such as isoparaffin (eg, trade name "Isoper", manufactured by Exxon Corporation), silicone oil, xylene, or toluene can be used as the insulating liquid.

The material, particle size and color of the electrophoretic particles are not particularly limited as long as they can achieve desired display. Materials preferably used therefor are colored and have good negative or positive chargeability. Such materials include, for example, various inorganic and organic pigments, carbon black, and resins containing pigments or carbon black. The particle size of the exposed surface is generally about 0.01-50 μm, preferably about 0.1-10 μm.

In the above-mentioned insulating liquid or electrophoretic particles, a charge control agent may be added to control and stabilize the chargeability of the electrophoretic particles. Charge control agents include, for example, succinimide, monoazo dye metal complex salts, salicylic acid, organic quaternary ammonium salts, and nigrosine compounds.

Next, the sealing film precursor used in the present invention will be described.

The sealing film precursor is preferably liquid, and is characterized by being insoluble in the above-mentioned dispersion medium.

Here, the term "insoluble" or "insoluble" means that there is a large difference between the solubility parameters of two compounds (eg, sealing film precursor and dispersion liquid). This difference is usually not less than 0.1, preferably not less than 0.5, more preferably not less than 1.0.

In addition, the sealing film matrix is characterized by having a small affinity for electrophoretic particles, and electrophoretic particles cannot be dissolved therein.

The polymerizable compound constituting such a sealing film matrix is not particularly limited as long as it can form a desired sealing film, but preferably has a partial structure selected from -O-, _-CH2O- , - At least one group of the group consisting of OH and -CH ₂ -.

By having such a partial structure, the resulting sealing film does not mix (dissolve) in the dispersion medium. In addition, it is also possible to control the physicochemical interaction between the resulting sealing film and the electrophoretic particles. As described above, when the polymerizable compound has the above partial structure, it is effective not only to produce a sealing film but also to control the function of the sealing film. The adhesion (force) between the electrophoretic particles and the sealing film is, for example, a physicochemical interaction, and can be controlled by the surface energy of the sealing film. Smaller bonds are produced when the surface energy of the sealing film is lower.

A polymerizable compound having a -CH ₂ -O- partial structure includes a polyethylene glycol unit having a -CH ₂ -CH ₂ -O- unit, (-CH ₂ -CH ₂ O) _n (n: integer), or - Polymerizable compounds of CH2 _- O- _CH2 - _CH2 - _CH2 - _CH2 -O- _CH2 -units.

In addition, polymerizable compounds with -O- moieties include units with adjacent groups -O- and -CH ₂ - (such as polyethylene glycol type), or units with no adjacent -CH ₂ - groups ( polymerizable compounds such as carbonate linkages).

Polymerizable compounds having a -CH ₂ - moiety include polymerizable compounds having repeating -CF ₂ - group units.

The polymerization method of the sealing film is not limited as long as the desired sealing film can be produced. For example, the sealing film can be formed by a photopolymerization process typified by UV polymerization.

In the case of employing UV polymerization, a radically polymerizable acrylate or methacrylate compound having a partial structure of -OH, _-CH2 -O-, -O-, _-CF2- may be utilized as a polymerizable compound. For example, such (meth)acrylate compounds include: 2-hydroxyethyl methacrylate; 1,4-butanediol diglycidyl ether diacrylate; polyethylene glycol monomethacrylate (such as from "Blenmer PE" series manufactured by Nippon Yushi KK); polytetramethylene ether glycol = bis(2-maleimide acetate) (for example, "MIA200" manufactured by Dainippon Ink And Chemicals); 1H, 1H,5H-Octafluoropentyl acrylate (for example, "V-8F" manufactured by Osaka Yuki Kagaku Kogyo KK); "V-17F" manufactured by .K.).

A polymerizable compound may be a polymerizable monomer or a polymerizable oligomer. These monomers and oligomers may be monofunctional compounds or polyfunctional compounds. In addition, the polymerizable compound may be a mixture of monomers and oligomers, or a mixture of monofunctional compounds and polyfunctional compounds.

In the presence of a photopolymerization initiator such as "Irgacure 184" or "Irgacure 641" available from Ciba Specialty Chemical K.K. or "MIA200" available from Dainippon Ink And Chemicals Co., Ltd. to polymerize the polymerizable compound.

The support member is not limited as long as it can form the desired sealing film, but its surface preferably has affinity or compatibility with the sealing film matrix. Due to the affinity, for example, in step 2 above, the supporting member can effectively support the sealing film matrix layer.

As such a support member applicable to the present invention, not only soft (flexible) substrates such as PET (polyethylene terephthalate), PC (polycarbonate), PES (polyethersulfone) can be used, but Hard substrates such as glass and quartz can also be used. The support element is preferably transparent. In addition, when the wavelength region of light used for the above-mentioned photopolymerization is in the UV range, it is also required that the supporting member exhibit UV transparency.

If the support member surface does not have affinity for the sealing film matrix, it needs to undergo affinity-imparting treatment, for example, by providing a polymer film of a polymerizable compound constituting the sealing film matrix at the support member surface. Other methods can also be used as long as they impart affinity to the surface of the support member (with the sealing film matrix).

The partition wall applicable to the present invention includes a thick film of a photoresist cured product (for example, "SU-8" manufactured by Minesota Mining & Manufacturing Co.).

The upper end of the partition wall preferably has an affinity for the sealing film matrix. Based on the affinity, the following advantages can be obtained. First, the adhesiveness between the upper end of the partition wall and the sealing film can be ensured. Next, for example, in step 2 of the embodiment of the manufacturing method according to the first aspect of the present invention, the dispersion medium can be prevented from entering the contact portion of the sealing film matrix layer and the partition wall. This is because the sealing film matrix and the dispersion medium are incompatible with each other, and the sealing film matrix has affinity for the upper end of the partition wall. In other words, a large amount of the dispersion medium located between the sealing film matrix layer and the upper end of the partition wall is caused to flow out.

If the upper end of the partition wall does not have the desired affinity for the sealing film matrix, it is necessary to experience affinity, for example, by coating the polymerizable compound or the polymer of the polymerizable compound constituting the sealing film matrix at the upper end of the partition wall and its vicinity. Sexuality-giving treatment. Other methods may also be used as long as they impart affinity to the upper end of the partition wall (to the sealing film matrix) and its vicinity.

The substrate on which the partition walls are formed used in the present invention is not particularly limited. Not only soft (flexible) substrates such as PET (polyethylene terephthalate), PC (polycarbonate), and PES (polyethersulfone), but also hard substrates such as glass and quartz can be used. The surface of the substrate in contact with the dispersion medium preferably has an affinity for the dispersion medium but does not have a property of being soluble in the dispersion medium.

The material and structure of the electrodes used in the present invention are also not greatly limited, as long as the desired display can be realized. The electrode material can be Al or ITO (Indium Tin Oxide). The electrode structure is not particularly limited as long as it can cause displacement of electrophoretic particles necessary to cause a necessary change in the display state. In the case where the above-described first electrode 60 is also used as a light reflection layer, a highly reflective material such as silver (Ag) or aluminum (Al) may be suitably used. When the first electrode 60 is used as an electrode for white display, the first electrode itself has surface unevenness, which causes irregular reflection of light. Alternatively, a light scattering layer may be formed on the first electrode.

(4) Next, the present invention will be described by way of example.

Example 1

The electric display device shown in Fig. 1 was prepared.

The resulting display device had 200 x 600 pixels, each pixel having a size of 240 μm x 80 μm. Each pixel is surrounded by a partition wall 20 having a width of 8 μm and a height of 28 μm. The first electrode 60 is disposed between adjacent partition walls 20 and connected to the switching device 80 . The second electrode 70 is provided between the partition wall 20 and the substrate 10 . The second electrode 70 is an electrode common to all pixels.

A specific manufacturing method of the display device in this embodiment will be described with reference to FIGS. 3-5 and 10 .

The switching device 80 is formed on a stainless steel substrate 10 of 0.1 mm thick. The substrate is then coated with an insulating layer of acrylic resin, and the insulating layer is provided with contact holes. After that, on the insulating layer, a resist pattern for scattering incident light is formed, and an aluminum first electrode 60 is formed on the resist pattern, and the first electrode 60 communicates with the switch provided on the substrate 10 through the contact hole. The device 80 is electrically connected. The first electrode 60 is covered with an acrylic resin layer. In this example, the first electrode 60 also serves as a light reflection/scattering layer (FIG. 3). On the acrylic resin layer, a deep black titanium carbide second electrode 70 and a partition wall 20 of a pure photoresist product ("SU-8" manufactured by 3M Company) were formed in a thick film by a known photolithography method. After the second electrode 70 is formed, the surface of the acrylic resin layer on the first electrode 60 and the surface of the second electrode 70 are covered with a polycarbonate layer.

After coating, a dispersion liquid containing dispersion medium 40 and electrophoretic particles 50 is filled at each pixel ( FIG. 10 ). Isoparaffin (trade name: “Isoper H”; specific gravity: 0.76; manufactured by Exxon Corporation) can be used as the dispersion medium 40 . As the electrophoretic compound 50, particles (average particle size: 1-2 μm) of a styrene-methyl methacrylate copolymer resin containing carbon black were used. In the isoparaffin, succinimide (trade name: "OLOA1200", manufactured by Shevron Corporation) was added as a charge control agent.

On the other hand, a sealing film matrix layer 120 was formed on a PET substrate as a supporting member 130 (FIG. 10). 1,4-Butanediol diglycidyl ether diacrylate (trade name: "NK oligo EA-5520"; specific gravity: not less than 1; manufactured by Shin Nakamura Kagaku Kogyo K.K.) as a UV-curable monomer can be used as Sealing membrane matrix. This acrylate monomer and Isoper H (as a dispersion medium) are incompatible with each other, and the specific gravity of the acrylate monomer is greater than that of Isoper H.

On the supporting member 130 prepared above, a sealing film precursor having a thickness of 7 μm was formed by spin-coating an acrylate monomer mixed with 5 wt % of a photopolymerization initiator (“Irgacure 184” available from Ciba-Gaigy Co., Ltd.) Layer 120.

After that, the supporting member 130 is placed on the partition wall 20 and the dispersion medium 40 so that the sealing film matrix layer 120 is in contact with the partition wall 20 and the dispersion medium 40 ( FIG. 10 ). After a few seconds of contact, the sealing film matrix layer 120 pushes the dispersion away from contact with the partition wall 20, thereby finally creating a situation where the sealing film matrix layer 120 covers the upper end of the partition wall 20 and the exposed (outer) surface of the dispersion liquid. state (Figure 4).

After producing this state, the produced structure was subjected to UV irradiation at an intensity of 0.3 mW/cm for 5 minutes at room temperature, causing polymerization of the sealing film matrix. As a result, a cured sealing film 30 is formed (FIG. 5).

After the polymerization, when the resulting display device was viewed from the side close to the sealing film 30 , no electrophoretic particles 50 were observed at the upper end portion of the partition wall 20 and inside the sealing film 30 . In other words, the electrophoretic particles 50 are not contained in the sealing film 30 during the polymerization process.

Then, the display device of this example was driven by alternately adjusting the potential of the second electrode between +15V and -15V at a frequency of 1 Hz while grounding the first electrode. As a result, the resulting display state changes alternately between a black state and a white state while the alternating potential is adjusted.

Even if the display device is continuously driven, it is not observed that the electrophoretic particles 50 move so as to overflow the partition walls 20 . In other words, it was confirmed that the dispersion liquid was confined by the sealing film, the partition wall and the substrate. It was also confirmed that the sealing film adhered to the partition wall without peeling.

Example 2

An electric display device was fabricated in the same manner as in Example 1 except that the supporting member 130 was removed from the sealing film 30 and the sealing film 30 was exposed to ambient air.

When the display device was driven in the same manner as in Embodiment 1, the display device exhibited the same display state change as in Embodiment 1. When the display device was driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, peeling of the sealing film 30 from the partition wall 20 side and volatilization of the dispersion medium 40 were not observed, proving that the sealing film 30 and the partition wall 20 were adhered to each other.

Thus, although the display device was bent backward and forward, the phenomenon that the electrophoretic particles 50 moved so as to overflow the partition walls was not observed. In addition, the driving of the display device was evaluated in the same manner as in Example 1 in a state where the display device was bent or bent inward. As a result, the same display state change as in Example 1 was observed.

Example 3

An electric display device was prepared in the same manner as in Example 1, except that the sealing film matrix was changed to polyethylene glycol methacrylate (trade name: "PE200"; specific gravity: not less than 1; manufactured by Nippon Yushi K.K.). Methacrylate is insoluble in Isoper H and has a specific gravity greater than that of Isoper H.

When the resulting display device was driven in the same manner as in Example 1, the same display state change as in Example 1 was observed. Even if the display device was driven continuously, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 4

An electric display device was prepared in the same manner as in Example 1, except that the material for the partition walls 20 was changed to rod-shaped and coiled block copolymers represented by the following formula (I):

where m=40, n=900.

Mw/Mn (weight average molecular weight/number average molecular weight) of the block copolymer<1.05.

The partition walls 20 were formed on the substrate by casting a solution of 3 wt % of the block copolymer in carbon disulfide at a humidity of 95% RH. The resulting partition wall 20 has a honeycomb structure with a measured pore diameter of 50 μm, a height of 5 μm, and an aspect ratio of 40.

After the partition wall 20 was formed, the sealing film 30 was formed in the same manner as in Embodiment 1. After the sealing film 30 is formed, the support member is removed.

The resulting display device was driven in the same manner as in Example 1. As a result, the same display state change as in Example 1 was observed. When the display device is driven, the phenomenon that the electrophoretic particles move so as to overflow the partition does not occur. In addition, peeling of the sealing film from the partition wall side was not observed.

Example 5

An electric display device as shown in FIG. 11 was prepared.

The resulting display device had 200 x 600 pixels, each pixel having a size of 240 μm x 80 μm. Each pixel is surrounded by a partition wall 20 having a width of 8 μm and a height of 28 μm. The first electrode 60 is disposed between adjacent partition walls 20 and connected to the switching device 80 . The second electrode 150 is disposed on the support member 130 . The second electrode 150 is an electrode common to all pixels.

The specific manufacturing method of the display device in this embodiment is basically the same as that in Embodiment 1.

The switching device 80 is formed on a stainless steel substrate 10 of 0.1 mm thickness. The substrate is then coated with an insulating layer of acrylic resin, and the insulating layer is provided with contact holes. After that, on the insulating layer, a resist pattern for scattering incident light is formed, and an aluminum first electrode 60 is formed on the resist pattern, and the first electrode 60 communicates with the switch provided on the substrate 10 through the contact hole. The device 80 is electrically connected. The first electrode 60 is covered with an acrylic resin layer. In this embodiment, the first electrode 60 also serves as a light reflection/scattering layer. On the acrylic resin layer, a thick-film partition wall 20 made of a pure photoresist product ("SU-8" manufactured by 3M Company) was formed by a known photolithography method, thereby defining each pixel.

Then, the dispersion liquid containing the dispersion medium 40 and the electrophoretic particles 50 is filled at each pixel ( FIG. 10 ). Isoparaffin (trade name: “Isoper H”; specific gravity: 0.76; manufactured by Exxon Corporation) can be used as the dispersion medium 40 . As the electrophoretic compound 50, white titanium oxide particles (average particle size: 1-2 μm) were used. In the isoparaffin, succinimide (trade name: "OLOA1200", manufactured by Shevron Corporation) was added as a charge control agent, and a blue dye was added.

On the other hand, the sealing film matrix layer 120 was formed on a PET substrate as the supporting member 130 provided with an ITO electrode layer as the second electrode 150 . 1,4-Butanediol diglycidyl ether diacrylate (trade name: "NK oligoEA-5520"; specific gravity: not less than 1; manufactured by Shin Nakamura Kagaku Kogyo K.K.) as a UV-curable monomer can be used as the seal membrane matrix. This acrylate monomer and Isoper H (as a dispersion medium) are incompatible with each other, and the specific gravity of the acrylate monomer is greater than that of Isoper H.

Formed Sealing film matrix layer 120 with a thickness of 7 μm.

After that, the supporting member 130 is placed on the partition wall 20 and the dispersion medium 40 so that the sealing film matrix layer 120 is in contact with the partition wall 20 and the dispersion medium 40 . After a few seconds from the contact, the sealing film matrix layer 120 pushes the dispersion away from contact with the partition wall 20, thereby finally creating such that the sealing film matrix layer 120 covers at least the upper end of the partition wall 20 and the exposed (outer) surface of the dispersion liquid. a state.

After producing this state, the produced structure was subjected to UV irradiation at an intensity of 0.3 mW/cm for 5 minutes at room temperature to polymerize the sealing film matrix. As a result, a cured sealing film 30 is formed (FIG. 11).

After the polymerization, when the resulting display device was viewed from the side close to the sealing film 30 , no electrophoretic particles 50 were observed at the upper end portion of the partition wall 20 and inside the sealing film 30 . In other words, the electrophoretic particles 50 are not contained in the sealing film 30 during the polymerization process.

Then, the display device of this example was driven by alternately adjusting the potential of the second electrode between +15V and -15V at a frequency of 1 Hz while grounding the first electrode. As a result, the resulting display state changes alternately between a white state and a blue state while the alternating potential is adjusted.

Even if the display device is continuously driven, it is not observed that the electrophoretic particles 50 move so as to overflow the partition walls 20 . In other words, it was confirmed that the dispersion liquid was confined by the sealing film, the partition wall and the substrate. It was also confirmed that the sealing film adhered to the partition wall without peeling.

Example 6

An electric display device was prepared in the same manner as in Example 1, but the sealing film precursor was changed to polytetramethylene ether glycol=bis(2-maleimide acetate) (trade name: "MIA200"; Specific gravity: not less than 1; manufactured by Dainippon Ink And Chemicals), and Irgacure 184 is not added to the sealing film matrix. This compound is insoluble in Isoper H and has a higher specific gravity than Isoper H. The reason why Irgacure 184 is not added to the sealing film matrix is that this compound (MIA200) can be polymerized without using a photopolymerization initiator.

When the resulting display device was driven in the same manner as in Example 1, the same display state change as in Example 1 was observed. Even if the display device was driven continuously, the phenomenon that the electrophoretic particles 50 moved so as to overflow the partition walls 20 was not observed. In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 7

An electric display device was prepared in the same manner as in Example 1, but the sealing film matrix was changed to 80 parts by weight of polytetramethylene ether glycol=bis(2-maleimide acetate) (trade name: " MIA200"; specific gravity: not less than 1; manufactured by Dainippon Ink And Chemicals) and 20 parts by weight of 1H, 1H, 5H-octafluoropentyl acrylate (trade name: "V-8F"; specific gravity: not less than 1; manufactured by Osaka Yuki Kagaku Kogyo K.K.), and Irgacure 184 is not added to the sealing film matrix. This mixture is insoluble in Isoper H and has a specific gravity greater than that of Isoper H. The reason why Irgacure 184 is not added to the sealing film matrix is that this compound (MIA200) can be polymerized without using a photopolymerization initiator.

When the resulting display device was driven in the same manner as in Example 1, the same display state change as in Example 1 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 8

An electric display device was prepared in the same manner as in Example 1, but the sealing film precursor was changed to 50 parts by weight of 1H, 1H, 2H, 2H-heptadecafluorodecyl acetate (trade name: "V-17F"; specific gravity: Not less than 1; manufactured by Osaka Yuki Kagaku Kogyo K.K.) and 15 parts by weight of 1H,1H,5H-octafluoropentyl acrylate (trade name: "V-8F"; specific gravity: not less than 1; manufactured by Osaka Yuki Kagaku Kogyo K.K. manufactured), and Irgacure 184 becomes "MIA200". This mixture is insoluble in Isoper H and has a higher specific gravity than Isoper H. Photopolymerization initiator (MIA200) is a component that constitutes the sealing film after polymerization.

When the resulting display device was driven in the same manner as in Example 1, the same display state change as in Example 1 was observed. Even if the display device was driven continuously, the phenomenon that the electrophoretic particles 50 moved so as to overflow the partition walls 20 was not observed. In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 9

The electric display device shown in Fig. 12 was prepared.

The resulting display device had 200 x 600 pixels, each pixel having a size of 240 μm x 80 μm. Each pixel is surrounded by a partition wall 20 having a width of 8 μm and a height of 28 μm. The first electrode 60 is disposed between adjacent partition walls 20 and connected to the switching device 80 . The second electrode 70 is provided between the partition wall 20 and the substrate 10 . The second electrode 70 is an electrode common to all pixels.

A specific manufacturing method of the display device in this embodiment will be described with reference to FIGS. 19-21 , 24 and 26 .

Referring to FIG. 19, a switching device 80 is formed on a stainless steel substrate 10 having a thickness of 0.1 mm. The substrate is then coated with an insulating layer of acrylic resin, and the insulating layer is provided with contact holes. After that, on the insulating layer, a resist pattern for scattering incident light is formed, and an aluminum first electrode 60 is formed on the resist pattern, and the first electrode 60 communicates with the switch provided on the substrate 10 through the contact hole. The device 80 is electrically connected. The first electrode 60 is covered with an acrylic resin layer containing titanium oxide fine particles. In this example, the first electrode 60 also serves as a light reflection/scattering layer. On the acrylic resin layer, deep black titanium carbide second electrodes 70 and thick-film partition walls 20 made of a pure photoresist product ("SU-8" manufactured by 3M Company) were formed by a known photolithography method.

In addition, 1,4-butanediol diglycidyl ether diacrylate (trade name: "NK oligo EA-5520"; specific gravity: not less than 1) as a UV polymerizable compound was spin-coated on a PET substrate; by Shin Nakamura Kagaku Kogyo K.K.) to which 5 wt% of a photopolymerization initiator ("Irgacure 184" manufactured by Ciba-Gaigy Co., Ltd.) was added. The resulting coating thickness of the polymerizable compound was 7 μm.

The PET substrate 180 provided with the polymerizable compound coating layer 190 was brought into contact with the upper end portion of the partition wall 20 as shown in FIG. 20 . After the contact, the PET substrate 180 is removed (peeled off) from the upper ends of the partition walls. As a result, the polymerizable compound can be provided at the upper end portion of the partition wall. In other words, the polymerizable compound can be transferred from the PET substrate onto the upper ends of the partition walls. One reason for the transfer is that the polymerizable compound (EA-5520) has a good affinity for the partition wall. Fig. 21 schematically illustrates a state after transfer, in which reference numeral 200 denotes a transfer layer of a polymerizable compound as a matrix of the above-mentioned adhesive film.

After the transfer, the dispersion liquid containing the dispersion medium 40 and the electrophoretic particles 50 is filled at each pixel ( FIG. 10 ). Isoparaffin (trade name: “Isoper H”; specific gravity: 0.76; manufactured by Exxon Corporation) can be used as the dispersion medium 40 . As the electrophoretic compound 50, particles (average particle size: 1-2 μm) of a styrene methyl methacrylate copolymer resin containing carbon black were used. In the isoparaffin, succinimide (trade name: "OLOA1200", manufactured by Shevron Corporation) was added as a charge control agent.

On the other hand, the sealing film matrix layer 120 provided on the dispersion medium was supported by a PET substrate as a supporting member 130 ( FIG. 24 ). 1,4-Butanediol diglycidyl ether diacrylate (trade name: "NK oligo EA-5520"; specific gravity: not less than 1; manufactured by Shin Nakamura Kagaku Kogyo K.K.) as a UV-curable monomer can be used as Sealing membrane matrix. This acrylate monomer and Isoper H (as a dispersion medium) are incompatible with each other, and the specific gravity of the acrylate monomer is greater than that of Isoper H.

On the above-prepared supporting member 130, an acrylate monomer mixed with 5 wt% of a photopolymerization initiator ("Irgacure 184" available from Ciba-Gaigy Co., Ltd.) was spin-coated to form a sealing film precursor with a thickness of 7 μm. Layer 120.

After that, the supporting member 130 is placed on the partition wall 20 and the dispersion medium 40 so that the sealing film matrix layer 120 is in contact with the partition wall 20 and the dispersion medium 40 . After a few seconds of contact, the sealing film matrix layer 120 pushes the dispersion away from contact with the partition wall 20, thereby finally creating a situation where the sealing film matrix layer 120 covers the upper end of the partition wall 20 and the exposed (outer) surface of the dispersion liquid. state (Figure 24).

After producing this state, the produced structure was subjected to UV irradiation at an intensity of 0.3 mW/cm for 5 minutes at room temperature to polymerize the sealing film precursor and the adhesive film precursor. As a result, a cured sealing film 30 and a cured adhesive film 90 are formed ( FIG. 26 ).

After the polymerization, when the resulting display device was viewed from the side close to the sealing film 30 , no electrophoretic particles 50 were observed at the upper end portion of the partition wall 20 and inside the sealing film 30 . In other words, the electrophoretic particles 50 are not contained in the sealing film 30 during the polymerization process.

Then, the display device of this example was driven by alternately adjusting the potential of the second electrode between +15V and -15V at a frequency of 1 Hz while grounding the first electrode. As a result, the resulting display state changes alternately between a black state and a white state while the alternating potential is adjusted.

Even if the display device is continuously driven, it is not observed that the electrophoretic particles 50 move so as to overflow the partition walls 20 . In other words, it was confirmed that the dispersion liquid was confined by the sealing film, the partition wall and the substrate. It was also confirmed that the sealing film adhered to the partition wall without peeling.

Example 10

An electric display device was prepared in the same manner as in Example 9, except that the supporting member 130 was removed from the sealing film 30, thereby exposing the sealing film 30 to the surrounding air.

When the display device was driven in the same manner as in Example 9, the display device exhibited the same display state change as in Example 9. When the display device was driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, peeling of the sealing film 30 from the partition wall 20 side and volatilization of the dispersion medium 40 were not observed, confirming that the sealing film 30 and the partition wall 20 were adhered to each other.

Thus, although the display device was bent backward and forward, the phenomenon that the electrophoretic particles 50 moved so as to overflow the partition walls was not observed. In addition, the driving of the display device was evaluated in the same manner as in Example 9 in a state where the display device was bent or bent inward. As a result, the same display state change as in Example 9 was observed. In addition, it was confirmed that the sealing film adhered to the partition wall and was not peeled off from the partition wall.

Example 11

An electric display device was prepared in the same manner as in Example 9, except that the sealing film matrix was changed to polyethylene glycol methacrylate (trade name: "PE200"; specific gravity: not less than 1; manufactured by Nippon Yushi K.K.). Methacrylate is insoluble in Isoper H and has a higher specific gravity than Isoper H.

When the resulting display device was driven in the same manner as in Example 9, the same display state change as in Example 9 was observed. Even when the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 12

An electrical display device was prepared as follows.

The same steps as in Example 9 were repeated until the partition wall 20 was formed.

Then, the same 1% polymerizable compound solution containing 5 wt% (based on the polymerizable compound) of a photopolymerization initiator ("Irgacure 184", manufactured by Ciba-Geigy Co., Ltd.) in ethanol as used in Example 9 was added to (EA-5520), spin-coated on a substrate with partition walls. Spin coating was performed so that the entire surface of the partition wall 20 was coated with a polymerizable compound solution (EA-5520), thereby forming an adhesive film matrix layer 200 as shown in FIG. 22 . The resulting structure was irradiated with UV light at an intensity of 0.3 mW/ ^cm2 for 15 seconds at room temperature. Under UV irradiation conditions, only a portion of the coated polymerizable compound (EA-5520) was polymerized.

After that, a dispersion liquid containing dispersion medium 40 and electrophoretic particles 50 is filled at each pixel ( FIG. 10 ). Isoparaffin (trade name: "Isoper H"; specific gravity: 0.76; manufactured by Exxon Corporation) was used as the dispersion medium 40 . As the electrophoretic compound 50, carbon black-containing styrene methyl methacrylate copolymer resin particles (average particle size: 1-2 μm) were used. In the isoparaffin, succinimide (trade name: "OLOA1200", manufactured by Shevron Corporation) was added as a charge control agent.

After that, the sealing film matrix layer formed on the supporting member 130 was placed on the dispersion medium in the same manner as in Example 9. After a few seconds of contact, the sealing film matrix layer 120 pushes the dispersion away from contact with the partition wall 20, thereby finally producing a state where the sealing film matrix layer 120 covers at least the upper end of the partition wall 20 and the exposed (outer) surface of the dispersion liquid (Figure 24).

After producing this state, the resulting structure was irradiated with UV radiation at an intensity of 0.3 mW/cm ² for 5 minutes at room temperature to polymerize the sealing film precursor and the adhesive film precursor. As a result, cured sealing film 30 and cured adhesive film 200 are formed.

After the polymerization, when the resulting display device was observed from the side close to the sealing film 30 , no electrophoretic particles 50 were observed at the upper end portion of the partition wall 20 and inside the sealing film 30 . In other words, during the polymerization process, the electrophoretic particles 50 are not contained in the sealing film 30 .

Then, the display device of this embodiment was driven by alternately adjusting the potential of the second electrode between +15V and -15V at a frequency of 1 Hz while grounding the first electrode. As a result, the resulting display state changes alternately between a black state and a white state while the alternating potential is adjusted.

Even if the display device is continuously driven, it is not observed that the electrophoretic particles 50 move so as to overflow the partition walls 20 . In other words, it was confirmed that the dispersion liquid was confined by the sealing film, the partition wall and the substrate. It was also confirmed that the sealing film adhered to the partition wall without peeling.

Example 13

An electric display device was prepared in the same manner as in Example 9, except that the supporting member 130 was removed from the sealing film 30, thereby exposing the sealing film 30 to the surrounding air.

When the display device was driven in the same manner as in Embodiment 12, the display device exhibited the same display state change as in Embodiment 12. When the display device was driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, peeling of the sealing film 30 from the side of the partition wall 20 and volatilization of the dispersion medium 40 were not observed, confirming that the sealing film 30 and the partition wall 20 were adhered to each other.

Thus, although the display device was bent backward and forward, the phenomenon that the electrophoretic particles 50 moved so as to overflow the partition walls was not observed. In addition, the driving of the display device was evaluated in the same manner as in Example 9 in a state where the display device was bent or bent inward. As a result, the same display state change as in Example 9 was observed. In addition, it was confirmed that the sealing film adhered to the partition wall and was not peeled off from the partition wall.

Example 14

An electric display device was prepared in the same manner as in Example 9, except that the material used for the partition wall 20 was changed to the same polymerizable compound (EA-5520) as that used also for the sealing film matrix layer.

When the resulting display device was driven in the same manner as in Example 9, the same display state change as in Example 9 was observed. Even when the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 15

An electric display device was prepared as follows.

The same procedure as in Example 9 was repeated until the dispersion liquid containing the electrophoretic particles, the dispersion medium, and the charge control agent was filled between the partition walls 20 .

Then, a 1% polymerizable compound solution (EA-5520) containing 5% by weight of a photopolymerization initiator ("Irgacure 184", manufactured by Ciba-Geigy Co., Ltd.) in chloroform (based on the polymerizable compound) was microsprayed on the dispersion liquid. ).

During the microspraying operation, when the chloroform solution adhered to the dispersion, the chloroform evaporated immediately, forming a thin film 300 of the polymerizable compound (EA-5520) at the exposed surface 140 of the dispersion ( FIG. 27 ). This is presumably due to the fact that the polymerizable compound (EA-5520) is insoluble in the dispersion and has a molecular structure containing -O- and -OH, thereby exhibiting properties similar to a certain type of surfactant. In this state, the surface of the dispersion liquid was irradiated with UV light at an intensity of 0.3 mW/cm ² for 5 minutes at room temperature. When the resulting structure was observed through a microscope, the dispersion medium 40 and the electrophoretic particles 50 were defined by the transparent thin film 310 and the partition walls 20, as shown in FIG. 28 .

Then, a polymerizable compound (EA-5520) containing 5 wt% of a photopolymerization initiator (“Irgacure 184”, manufactured by Ciba-Geigy Co., Ltd.) in chloroform was coated on the film 310 .

In this state, the surface of the polymerizable compound layer was irradiated with UV light at an intensity of 0.3 mW/cm ² for 5 minutes at room temperature to form a polymer layer of the polymerizable compound bonded to the film 310 as a sealing film.

A 5 μm thick polycarbonate film was formed on the sealing film, followed by irradiation with UV light at an intensity of 0.3 mW/cm ² for 6 minutes at room temperature. As a result, the polymerizable compound remaining on the outer surface side of the sealing film continues to polymerize, and at the same time, the polycarbonate film is bonded to the sealing film, thereby forming a strong, airtight structure.

After the polymerization, when the resulting display device was viewed from the side close to the sealing film 30 , no electrophoretic particles 50 were observed at the upper end portion of the partition wall 20 and inside the sealing film. In other words, the electrophoretic particles 50 are not contained in the sealing film during the polymerization process.

Then, the display device of this example was driven by alternately adjusting the potential of the second electrode between +15V and -15V at a frequency of 1 Hz while grounding the first electrode. As a result, the resulting display state changes alternately between a black state and a white state while the alternating potential is adjusted.

Even if the display device is continuously driven, it is not observed that the electrophoretic particles 50 move so as to overflow the partition walls 20 . In other words, it was confirmed that the dispersion liquid was confined by the sealing film, the partition wall and the substrate. It was also confirmed that the sealing film adhered to the partition wall without peeling.

Example 16

An electric display device shown in Fig. 29 was prepared.

The resulting display device had 200 x 600 pixels, each pixel having a size of 240 μm x 80 μm. Each pixel is surrounded by a partition wall 20 having a width of 8 μm and a height of 28 μm. The first electrode 60 is disposed between adjacent partition walls 20 and connected to the switching device 80 . The second electrode 150 is disposed on the supporting member 130 for supporting the sealing film 30 . The second electrode 150 is an electrode common to all pixels.

The same steps as in Example 9 were repeated until partition walls 20 were formed.

In addition, spin-coat polytetramethylene ether glycol = bis(2-maleimide acetate) (trade name: "MIA-200"; specific gravity: not less than 1; by Dainippon InkAnd Chemicals manufactured by the company). The thickness of the polymerizable compound coating produced was 7 μm.

The PET substrate provided with the coating layer of the polymerizable compound was brought into contact with the upper end portion of the partition wall 20 . After the contact, the PET substrate was removed (peeled off) from the upper end of the partition wall. As a result, the polymerizable compound can be provided at the upper end portion of the partition wall. In other words, the polymerizable compound can be transferred from the PET substrate onto the upper ends of the partition walls. One reason for the transfer is due to the good affinity of the polymerizable compound (MIA 200) for the partition wall.

After the transfer, a dispersion liquid containing the dispersion medium 40 and the electrophoretic particles 50 is filled at each pixel ( FIG. 10 ). Isoparaffin (trade name: "Isoper H"; specific gravity: 0.76; manufactured by Exxon Corporation) was used as the dispersion medium 40 . As the electrophoretic compound 50, white titanium oxide particles (average particle size: 1-2 μm) were used. In the isoparaffin, succinimide (trade name: "OLOA1200", manufactured by Shevron Corporation) was added as a charge control agent, and a blue dye was added.

On the other hand, on a PET substrate provided with an ITO electrode layer as the second electrode 150 and as the supporting member 130, the sealing film matrix layer 120 was formed. 1,4-Butanediol diglycidyl ether diacrylate (trade name: "NK oligoEA-5520"; specific gravity: not less than 1; manufactured by Shin Nakamura Kagaku Kogyo K.K.) as a UV-curable monomer was used as a sealing film matrix. This acrylate monomer and Isoper H (as a dispersion medium) are incompatible with each other, and the specific gravity of the acrylate monomer is greater than that of Isoper H.

On the supporting member 130 (with the second electrode 150) prepared above, by spin-coating an acrylate monomer mixed with 5 wt% of a photopolymerization initiator ("Irgacure 184" available from Ciba-Gaigy Co., Ltd.), a Sealing film matrix layer 120 with a thickness of 7 μm.

After that, the supporting member 130 is placed on the partition wall 20 and the dispersion medium 40 so that the sealing film matrix layer 120 is in contact with the partition wall 20 and the dispersion medium 40 . After a few seconds from the contact, the sealing film matrix layer 120 pushes the dispersion away from contact with the partition wall 20, thereby finally creating such that the sealing film matrix layer 120 covers at least the upper end of the partition wall 20 and the exposed (outer) surface of the dispersion liquid. a state.

After producing this state, the produced structure was subjected to UV irradiation at an intensity of 0.3 mW/cm ² for 5 minutes at room temperature, causing polymerization of the sealing film precursor and the adhesive film precursor. As a result, a cured sealing film 30 and a cured adhesive film 90 are formed ( FIG. 29 ).

After the polymerization, when the resulting display device was viewed from the side close to the sealing film 30 , no electrophoretic particles 50 were observed at the upper end portion of the partition wall 20 and inside the sealing film 30 . In other words, the electrophoretic particles 50 are not contained in the sealing film 30 during the polymerization process.

Then, the display device of this example was driven by alternately adjusting the potential of the second electrode between +15V and -15V at a frequency of 1 Hz while grounding the first electrode. As a result, the resulting display state changes alternately between a white state and a blue state while the alternating potential is adjusted.

Even if the display device is continuously driven, it is not observed that the electrophoretic particles 50 move so as to overflow the partition walls 20 . In other words, it was confirmed that the dispersion liquid was confined by the sealing film, the partition wall and the substrate. It was also confirmed that the sealing film adhered to the partition wall without peeling.

Example 17

An electric display device was prepared in the same manner as in Example 1, except that the adhesive film matrix was changed to β-acryloyloxyethylhydrosuccinate (trade name: "NK-ester A-SA"; specific gravity: not less than 1 ; manufactured by Shin Nakamura Kagaku Kogyo K.K.). This compound is insoluble in Isoper H.

When the resulting display device was driven in the same manner as in Example 9, the same display state change as in Example 9 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 18

An electric display device was prepared in the same manner as in Example 9, except that the adhesive film matrix was changed to polytetramethylene ether glycol = bis(2-maleimide acetate) (trade name: "MIA- 200"; specific gravity: not less than 1; manufactured by Dainippon Ink And Chemicals). This compound is insoluble in Isoper H.

When the resulting display device was driven in the same manner as in Example 9, the same display state change as in Example 9 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 19

An electric display device was prepared in the same manner as in Example 10, but the sealing film precursor was changed to polytetramethylene ether glycol=bis(2-maleimide acetate) (trade name: "MIA-200") ; Specific gravity: not less than 1; manufactured by Dainippon Ink And Chemicals), and Irgacure 184 is not added to the sealing film matrix. This compound is insoluble in Isoper H and has a higher specific gravity than Isoper H.

When the resulting display device was driven in the same manner as in Example 18, the same display state change as in Example 18 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 20

An electric display device was prepared in the same manner as in Example 18, but the sealing film precursor was changed to polytetramethylene ether glycol=bis(2-maleimide acetate) (trade name: "MIA-200") ; Specific gravity: not less than 1; manufactured by Dainippon Ink And Chemicals) and 20 parts by weight of 1H, 1H, 5H-octafluoropentyl acrylate (trade name: "V-8F"; specific gravity: not less than 1; manufactured by Osaka Made by Yuki Kagaku Kogyo K.K.). This mixture is insoluble in Isoper H and has a higher specific gravity than Isoper H.

When the resulting display device was driven in the same manner as in Example 18, the same display state change as in Example 18 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 21

Prepare an electric display device in the same manner as in Example 18, but the sealing film matrix is changed to 85 parts by weight of 1H, 1H, 2H, 2H-heptadecafluorodecyl acrylate (trade name: "V-17V"; specific gravity: Not less than 1; manufactured by Osaka Yuki Kagaku Kogyo K.K.) with 15 parts by weight of 1H, 1H, 5H-octafluoropentyl acrylate (trade name: "V-8F"; specific gravity: not less than 1; manufactured by Osaka Yuki Kagaku Kogyo manufactured by K.K.). This mixture is insoluble in Isoper H and has a higher specific gravity than Isoper H.

When the resulting display device was driven in the same manner as in Example 18, the same display state change as in Example 18 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

Example 22

An electric display device was prepared in the same manner as in Example 15, except that polytetramethylene ether glycol=bis(2-maleimide acetate) (trade name: "MIA200"; specific gravity: not less than 1; manufactured by Dainippon Ink And Chemicals) as the material of the film 300, and using this polymerizable compound as the sealing film matrix, no photopolymerization initiator (Irgacure 184) was added to MIA200, and the polycarbonate film was not laminated on the sealing film superior.

When the resulting display device was driven in the same manner as in Example 15, the same display state change as in Example 15 was observed. Even if the display device was continuously driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

As described above, according to the method of the present invention, an electric display device including an inexpensive, flexible sealing film can be provided regardless of the specific gravity of the polymerizable compound. In addition, good adhesion between the sealing film and the partition wall can be ensured.

Although the invention has been described with reference to specific embodiments disclosed herein, the invention is not limited to the details given, the purpose of which is to cover modifications or changes within the purpose of improvement or within the scope of the following claims.

Claims (19)

1. A method for manufacturing an electrical display device, wherein the dispersion liquid containing at least a dispersion medium and electrophoretic particles is provided on a substrate defined by a substrate, a partition provided on the substrate, and a sealing film provided on the upper end of the partition In the space, the method includes: A step of providing a sealing film matrix containing a polymerizable compound and supported by a support member on the exposed surface of the dispersion and on at least a part of the upper end of the partition in a state where the dispersion is filled between the adjacent partitions ,and polymerizing the polymerizable compound to form a sealing film. 2. The method of claim 1, wherein the support member has a surface having an affinity for the sealing membrane matrix. 3. The method according to claim 1, wherein the dispersion liquid and the sealing film matrix are immiscible with each other. 4. The method of claim 1, wherein the polymerizable compound is a photopolymerizable compound. 5. The method of claim 4, wherein the photopolymerizable compound comprises a photopolymerizable monomer or oligomer. 6. The method of claim 5, wherein the photopolymerizable monomer is 1,4-butanediol diglycidyl ether diacrylate. 7. The method according to claim 5, wherein the photopolymerizable oligomer is polytetramethylene ether glycol=bis(2-maleimide acetate). 8. The method of claim 5, wherein the photopolymerizable monomer or oligomer comprises at least two kinds of monomers or oligomers. 9. The method of claim 8, wherein one of the at least two monomers or oligomers is fluorine-containing acrylate. 10. The method according to claim 8, wherein one of the at least two monomers or oligomers is polytetramethylene ether glycol=bis(2-maleimide acetate ). 11. The method of claim 1, wherein the supporting member is removed from the sealing film after the polymerization is completed. 12. The method according to claim 11, wherein after removing the supporting member, another thin film is provided on the sealing film. 13. The method of claim 1, wherein the supporting member and the sealing film are transparent. 14. A method of manufacturing an electric display device, wherein a dispersion liquid containing at least a dispersion medium and electrophoretic particles is provided on a substrate, a partition wall provided on the substrate and provided with an adhesive film at an upper end thereof, and Provided in the space defined by the sealing film on the upper end of the partition wall, the method includes: the step of providing an adhesive film precursor comprising a polymerizable compound on the upper end of the partition wall, the step of providing a sealing film precursor comprising a polymerizable compound on the exposed surface of the dispersion and at least the surface of the adhesive film at the upper end of the partition wall, and A step of polymerizing a polymerizable compound so that the sealing film and the adhesive film are integrated in a state where the adhesive film precursor is in contact with the sealing film precursor. 15. The method according to claim 14, wherein the polymerizable compound has at least one group selected from -O-, _-CH2 -O-, -OH- and _-CF2- . 16. The method of claim 14, wherein the polymerizable compound has a polyethylene glycol structure. 17. The method of claim 14, wherein the polymerizable compound is a photopolymerizable compound. 18. The method of claim 14, wherein the photopolymerizable compound is 1,4-butanediol diglycidyl ether diacrylate. 19. The method of claim 15, wherein the partition wall comprises a polymer of a polymerizable compound.

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