JP2015197468A - Manufacturing method of cell type electrophoretic display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of an electrophoretic display device excellent in a yield and display quality.SOLUTION: A manufacturing method of a cell type electrophoretic display device having a cell type electrophorentic display medium layer 5 including one or more types of an electrophoretic body and a liquid medium in a plurality of cells partitioned by a septum portion 3 formed between a first electrode substrate 1 and a second electrode substrate 2 has a transfer step: bonding a surface where an adhesion agent 14 of a transfer substrate 20 having the adhesion agent 14 containing a base material 11 and thermoplastic resin applied on the base material 11 as a principal ingredient is disposed to an end on an opposite side of the first electrode substrate 1 of the septum portion 3 formed on a surface having a first electrode layer 1b of the first electrode substrate 1 formed; peeling off the transfer substrate 20 from the septum portion 3; transferring the adhesion agent 14 on the end of the septum portion 3 to thereby form an adhesion layer 4 on the end of the septum portion 3. The transfer step is configured to peel off the transfer substrate 20 from the septum portion 3 at a non-adhesion velocity at which the adhesion agent 14 is not adhered in the cell.

Description

  The present invention relates to a method for manufacturing a cell type electrophoretic display device excellent in yield and display quality.

  An electrophoretic display device is a device that displays information by using electrophoretic migration, ie, particle movement, of an electrophoretic body (usually electrophoretic particles) in air or in a solvent. Usually, by applying an electric field between two substrates, the state of electrophoretic control is controlled, whereby a desired display is realized.

  In recent years, such an electrophoretic display device has attracted attention especially as an electronic paper. Electronic paper using an electrophoretic display device can have features such as visibility at a printed matter level, ease of information rewriting, low power consumption, and light weight.

  There are several types of electrophoretic display device structures. Among them, the cell-type structure partitioned by arranging a plurality of partition walls between a pair of substrates has poor display due to particle sedimentation and uneven distribution. In particular, since it is possible to suppress a reduction in contrast, it is used as a suitable material for electronic paper (see, for example, Patent Document 1). Such an electrophoretic display device may be referred to as a “cell-type electrophoretic display device”.

  As shown in FIG. 3, the cell type electrophoretic display device includes a pair of electrode substrates 21A and 21B facing each other, and a partition wall portion 22 formed between the electrode substrates 21A and 21B. 22, a minute region 23 is partitioned. Note that the minute region 23 partitioned by the partition wall 22 is referred to as a cell or a pixel. Each cell 23 encloses an electrophoretic substance to be electrophoresed or a display medium 24 containing inks 25A and 25B containing the electrophoretic substance. When an electric field is applied between the electrode substrates 21A and 21B, the display medium The electrophores or inks 25A and 25B in 24 are moved and pulled up to the display surface side X, whereby an image is formed.

As a method of sandwiching the partition wall between the opposing electrode substrates, a method in which the partition wall is formed on one electrode substrate and then bonded to the other electrode substrate through an adhesive layer formed on the end of the partition wall. Used.
As a method of forming an adhesive layer on the end of the partition wall, Patent Document 1 uses a transfer substrate coated with an adhesive on one side, and bonds the adhesive surface of the transfer substrate on the end of the partition wall, A method of providing an adhesive layer on the end of the partition wall by transferring an adhesive is disclosed.
As another method for forming an adhesive layer, Patent Document 2 discloses a method for forming an adhesive layer on an end of a partition wall using a screen printing method.

JP 2011-175225 A JP 2010-262309 A

However, when the adhesive layer is formed by the transfer method, there is a problem in that the display quality is deteriorated as a result of the adhesive adhering to a plurality of cells partitioned by the partition walls in addition to the end portions of the partition walls.
In addition, the method using the screen printing method as described above has a problem in that high-accuracy alignment between the partition wall and the screen plate is required, and the yield is low.

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide a method for manufacturing a cell-type electrophoretic display device excellent in yield and display quality.

  As a result of repeated studies to solve the above problems, the present inventors have long stretched so that the adhesive on the transfer substrate pulls the thread when the transfer substrate bonded onto the end of the partition wall has a low peeling speed. If the amount of adhesive that adheres to the inside of the cell increases, and if the peeling speed is high, the adhesive breaks at a stage where the elongation of the adhesive on the transfer substrate is short, and the amount of adhesive that adheres to the inside of the cell The present inventors have found that the amount is reduced and have completed the present invention.

  That is, the present invention provides a first electrode substrate having a first electrode layer formed on one surface of the first substrate and the first substrate, and formed on one surface of the second substrate and the second substrate. A second electrode substrate, the second electrode substrate disposed so that the first electrode layer and the second electrode layer face each other, the first electrode substrate, and the first electrode substrate A cell-type electrophoretic display medium layer in which a display medium containing at least one kind of electrophores and a liquid medium is enclosed in a plurality of cells partitioned by partition walls formed between the second electrode substrates. A method for manufacturing a cell-type electrophoretic display device, comprising: an end portion on the opposite side of the partition wall portion formed on the surface of the first electrode substrate on which the first electrode layer is formed. A base material and a thermoplastic resin coated on the base material Bonding the surface on which the adhesive is disposed of a transfer substrate having an adhesive as a main component, peeling the transfer substrate from the partition wall, and transferring the adhesive onto the end of the partition wall And a transfer step of forming an adhesive layer on the end of the partition wall, and the transfer step peels the transfer substrate from the partition wall at a non-adhesion rate that is a rate at which the adhesive does not adhere to the cell. A method for manufacturing a cell-type electrophoretic display device is provided.

  According to the present invention, since the transfer step is to peel the transfer substrate from the partition wall at the non-adhesion speed, it is possible to prevent the adhesive from adhering in the cell. Further, by using the transfer substrate, an adhesive layer can be formed on the end portion of the partition wall with high yield.

  In the present invention, the thermoplastic resin is a polyester resin having a softening temperature in the range of 40 ° C to 130 ° C, and the temperature of the adhesive in the transfer step is 10 ° C to 100 ° C higher than the softening temperature of the adhesive. It is preferable that the non-adhering speed is 5 m / min or more and less than 60 m / min. It is because it can suppress stably that an adhesive agent adheres in a cell by being the said non-adhesion speed | velocity | rate.

  In the present invention, the thermoplastic resin is a urethane resin having a softening temperature in the range of 40 ° C to 150 ° C, and the temperature of the adhesive in the transfer step is 10 ° C to 100 ° C higher than the softening temperature of the adhesive. It is preferable that the non-adhering speed is 5 m / min or more and less than 60 m / min. It is because it can suppress stably that an adhesive agent adheres in a cell by being the said non-adhesion speed | velocity | rate.

  In the present invention, there is an effect that a manufacturing method of a cell type electrophoretic display device excellent in yield and display quality can be provided.

It is process drawing which shows an example of the manufacturing method of the cell-type electrophoretic display device of this invention. It is explanatory drawing explaining the mechanism in which an adhesive adheres in a cell. It is a schematic sectional drawing which shows an example of a general cell-type electrophoretic display device.

The present invention relates to a method for manufacturing a cell-type electrophoretic display device.
Hereinafter, a method for manufacturing the cell-type electrophoretic display device of the present invention will be described.

  The method for manufacturing a cell-type electrophoretic display device of the present invention includes a first electrode substrate having a first electrode layer formed on one surface of the first substrate and the first substrate, a second substrate, and the second substrate. A second electrode substrate having a second electrode layer formed on one surface of the substrate and disposed so that the first electrode layer and the second electrode layer are opposed to the first electrode substrate; A cell type in which a plurality of cells partitioned by a partition formed between the first electrode substrate and the second electrode substrate are sealed with a display medium containing at least one kind of electrophoretic body and liquid medium. An electrophoretic display medium layer comprising: an electrophoretic display medium layer, wherein the partition wall portion is formed on a surface of the first electrode substrate on which the first electrode layer is formed. At the end opposite to the electrode substrate, on the base material and the base material The transfer substrate having the adhesive containing the applied thermoplastic resin as a main component is bonded to the surface on which the adhesive is disposed, the transfer substrate is peeled off from the partition wall, and the transfer substrate is over the end of the partition wall. A transfer step of forming an adhesive layer on the end of the partition wall by transferring the adhesive, wherein the transfer step is performed at a non-adhesion rate that is a rate at which the adhesive does not adhere to the cell. The transfer substrate is peeled off from the portion.

A method for manufacturing such a cell type electrophoretic display device of the present invention will be described with reference to the drawings. FIG. 1 is a process diagram showing an example of a method for manufacturing a cell-type electrophoretic display device of the present invention. As illustrated in FIG. 1A, a first electrode substrate 1 having a first electrode layer 1b formed on one surface of the first substrate 1a and the first substrate 1a, and the first electrode substrate 1 A transfer substrate having a partition wall portion 3 formed on the surface on which the first electrode layer 1b is formed, a base material 11 and an adhesive 14 containing a thermoplastic resin applied on the base material 11 as a main component. 20 is prepared, and the surface of the transfer substrate 20 on which the adhesive 14 is disposed is bonded to the end of the partition wall 3 opposite to the first electrode substrate 1 (FIG. 1B). The transfer substrate 20 is peeled off from the partition wall 3 at a non-adhesion speed F, which is a speed at which the adhesive 14 does not adhere to the cell, and the adhesive 14 is transferred onto the end of the partition wall 3. Then, the adhesive layer 4 is formed on the end portion of the partition wall 3 (FIG. 1C).
Next, the display medium 5a is filled into a plurality of cells partitioned by the partition walls 3 formed on the first electrode substrate 1 (FIG. 1D). Then, a second electrode substrate 2 having a second electrode layer 2b formed on one surface of the second substrate 2a and the second substrate 2a is prepared, and the first electrode layer 1b of the first electrode substrate 1 is prepared. And by arranging and bonding the second electrode layer 2b of the second electrode substrate 2 so as to face each other, the partition wall portion 3 formed between the first electrode substrate 1 and the second electrode substrate 2 A cell-type electrophoretic display device 10 having a cell-type electrophoretic display medium layer 5 in which a display medium 5a containing at least one kind of electrophores and a liquid medium is enclosed in a plurality of partitioned cells is obtained. is there.
1B and 1C show the transfer process, among which FIG. 1B shows the transfer substrate bonding process, and FIG. 1C shows the peeling process. Moreover, FIG.1 (d) and FIG.1 (e) are a display medium filling process and a bonding process, respectively.

According to the present invention, since the transfer step is to peel the transfer substrate from the partition wall at the non-adhesion speed, it is possible to prevent the adhesive from adhering in the cell. Further, by using the transfer substrate, an adhesive layer can be formed on the end portion of the partition wall with high yield.
Here, it is not clear why the adhesive can be prevented from adhering in the cell by having a transfer step in which the transfer substrate is peeled from the partition wall at a predetermined speed. Is inferred.

That is, in the transfer step, the partition wall formed on the first electrode substrate is bonded to the end of the partition wall by bonding the surface of the transfer substrate on which the adhesive is disposed. Bonded to the transfer substrate. For this reason, the cells partitioned by the partition walls are in a sealed state in which one is sealed by the first electrode substrate and the other is sealed by the transfer substrate. When the transfer substrate is pulled away from the partition wall in this state, the adhesive is stretched into a film shape and is eventually broken, so that the transfer substrate is peeled from the partition wall.
Here, in the state in which the adhesive extending in the form of a film is formed, the inside of the sealed cell is in a reduced pressure state due to an increase in volume. When the pressure inside the cell is lower than the outside of the cell, such as when the outside of the cell is atmospheric pressure or when the atmospheric pressure is reached, as shown in FIG. A force U for pulling the adhesive 14 toward is generated. And as shown in FIG.2 (b), the broken end of the adhesive agent 14 will remain inside a cell by fracture | rupture in the state in which the adhesive agent 14 was drawn inside the cell.

By the way, a material having viscoelasticity such as an adhesive stretches long when the stretching speed is slow, and exhibits a property that it cannot be stretched long and stretches easily when the stretching speed is fast.
In the present invention, in the transfer step, the speed at which the transfer substrate is peeled from the partition wall is set to be higher than that conventionally performed, so that the length of the stretched adhesive is short. Can be broken. For this reason, the volume increase in the cell sealed by the first electrode substrate and the transfer substrate can be suppressed, and the degree of the reduced pressure state is low. As a result, the force for drawing the adhesive into the cell is weak. Can be.
In addition, since the length of the adhesive extending in a film shape can be shortened, the length of the adhesive drawn into the cell can be shortened. Furthermore, the adhesive having a short film length has a wider adhesive width (d in FIG. 2 (a)) than the long adhesive, and has a strong resistance to the pulling force into the cell. Therefore, the length of the adhesive drawn into the cell can be shortened. For this reason, the amount of adhesive drawn into the cell can be reduced when the adhesive stretched into a film is broken.
From the above, it is possible to suppress adhesion of the adhesive in the cell by having a transfer process in which the transfer substrate is peeled from the partition wall at a predetermined speed.

The manufacturing method of the cell-type electrophoretic display device of the present invention includes a transfer step.
Hereinafter, each process of the manufacturing method of the cell-type electrophoretic display device of the present invention will be described in detail.

1. Transfer process The transfer process of the present invention includes a base material and an end of the partition wall formed on the surface of the first electrode substrate on the side opposite to the first electrode substrate. A transfer substrate having an adhesive containing a thermoplastic resin applied as a main component on the substrate is bonded to the surface on which the adhesive is disposed, and the transfer substrate is peeled off from the partition wall, In this step, an adhesive layer is formed on the end of the partition wall by transferring the adhesive onto the end.

(1) Transfer substrate The transfer substrate used in this step has a base material and an adhesive applied on the base material.

(A) Substrate The material constituting the substrate is not particularly limited as long as it can support the adhesive, and a resin material such as polyethylene terephthalate can be used.

  The thickness of the base material is not particularly limited as long as it can support the adhesive, and can be in the range of 10 μm to 1000 μm.

(B) Adhesive The adhesive contains a thermoplastic resin as a main component.
Specific examples of the thermoplastic resin include ethylene-vinyl acetate copolymers, thermoplastic base polymers such as polyesters, polyamides, polyolefins, polyurethanes, natural rubber, styrene-butadiene block copolymers, and styrene-isoprene block copolymers. Examples thereof include thermoplastic elastomers such as polymers, styrene-ethylene-butylene-styrene block copolymers, and styrene-ethylene-propylene-styrene copolymers.
As said adhesive agent, what added tackifying resin and a plasticizer can be used as needed.
In addition, containing as a main component means that 75 mass% or more is contained in solid content of the said adhesive agent. Moreover, solid content means all components other than the solvent contained in an adhesive agent.

The softening temperature of the adhesive is not particularly limited as long as it can be transferred onto the end of the partition wall by this step, but either the glass transition temperature or the melting point of the base material is lower. The temperature is preferably lower than the temperature. This is because generation of wrinkles and waviness due to shrinkage of the base material due to heating for transferring the adhesive can be suppressed, and the transfer substrate can be brought into stable contact with the partition wall. Moreover, it is preferable that the temperature is lower than a temperature at which the chemical properties of each component contained in the display medium change or a phase change such as volatilization occurs. This is because a decrease in display performance can be suppressed.
Specifically, the softening temperature is preferably 130 ° C. or lower, more preferably 120 ° C. or lower, and particularly preferably 80 ° C. or lower.
The lower limit of the softening temperature is not particularly limited as long as it is higher than the temperature applied to the adhesive layer when the cell-type electrophoretic display device manufactured by the manufacturing method of the present invention is used. 40 ° C. or higher.
The softening temperature of the adhesive refers to the higher of the glass transition temperature (Tg) or the melting temperature (Tm) of the thermoplastic resin contained as a main component in the adhesive.
Moreover, as a measuring method of such a glass transition temperature and a melting temperature, the measuring method based on JISK7121 can be used. Specifically, a differential scanning calorimeter (DSC) is used, and the measurement condition is that the sample is put in a standard sample container (φ5 mm × 2.5 mmH, about 50 μL), and the scanning speed (heating rate) = 5 ° C. / It can obtain | require by performing a heating measurement in min and a temperature range-100 degreeC-200 degreeC. DSC8230D manufactured by Rigaku Corporation can be used as the DSC. Moreover, when the said adhesive agent contains a solvent, it measures about the solid content after solvent removal.

The thickness of the adhesive applied on the substrate is appropriately set according to the thickness of the adhesive layer formed on the end of the partition wall, but within the range of 1 μm to 100 μm. It is preferable that it is within a range of 1 μm to 50 μm, and in particular within a range of 1 μm to 20 μm.
When the thickness is within the above-mentioned range, the first electrode substrate and the second electrode substrate can be bonded to each other with a sufficient adhesive force by an adhesive layer formed by transferring the adhesive. This is because the display characteristics can be improved. Further, it is possible to suppress the cell type electrophoretic display device from being thick and to have a low driving voltage.

(2) First Electrode Substrate The first electrode substrate in this step has the first substrate and the first electrode layer.
The first electrode substrate may be used on either the display surface side or the back surface side of the cell type electrophoretic display device.
The first electrode substrate used in this step may be a ready-made product or a formed one.

(A) First substrate The first substrate may be transparent or opaque, but is preferably transparent when the first electrode substrate is disposed on the surface side.
As a material constituting the first substrate, a transparent material or an opaque material generally used for a cell-type electrophoretic display device can be used.
Specifically, glass or resin can be used as the transparent material.
Specific examples of the glass include alkali-free glass and alkali glass.
Specific examples of the resin include polypropylene (PP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyethylene (PE), polycarbonate (PC), acrylic, polyvinyl chloride. , Polyvinyl alcohol, polyimide, polyetherimide, polyether ether ketone, polyether ketone, polyphenylene sulfide, liquid crystal polymer, epoxy resin, silicone resin, phenol resin and the like. Among these, polyethylene terephthalate (PET) is preferable. This is because the versatility is high and the manufacturing cost of the cell type electrophoretic display device can be reduced.
The opaque material used when the first substrate is opaque is a surface facing the surface on which the first electrode layer of the first substrate made of the transparent material is formed, that is, the other of the first substrate. A film obtained by vapor-depositing a metal film on the surface of the resin, a resin kneaded with a dye, a pigment, or the like can be used.

The thickness of the first substrate is preferably in the range of 10 μm to 1 mm, and more preferably in the range of 50 μm to 300 μm.
This is because when the thickness of the first substrate is within the above range, the first substrate can have sufficient strength and less damage. Moreover, it is lightweight and can be made low-cost.

Further, when the first substrate has transparency, the transmittance in the visible light region is preferably 80% or more, and more preferably 90% or more. This is because, when the transmittance of the first substrate is within the above range, it is possible to prevent a decrease in display luminance when the first electrode substrate is used on the display surface side of the cell type electrophoretic display device. .
In addition, the transmittance | permeability of a 1st board | substrate can be measured by JISK7361-1 (The test method of the total light transmittance of a plastic-transparent material).

  The first substrate may be subjected to an antioxidant treatment such as a plating treatment on the surface.

(B) First electrode layer The first electrode layer in this step may be transparent or opaque, but when the first electrode substrate is disposed on the display side surface, the first electrode layer Is also transparent, that is, the first electrode layer is preferably a transparent electrode layer. On the other hand, when arranged on the back side, it is usually opaque.

  The material of the transparent electrode layer is not particularly limited as long as it is a conductive material having transparency. For example, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide, zinc oxide, oxide Conductive oxides such as indium and aluminum zinc oxide (AZO), metals such as Au, Ni, and Ag, conductive polymers such as polyaniline, polyacetylene, polyalkylthiophene derivatives, polysilane derivatives, carbon nanotubes, graphene, and the like are used. be able to.

  The material of the electrode layer when the first electrode layer is opaque is, for example, a metal such as Cu, Ag, Au, Pt, Al, Cr, Co, or Sn, or APC (an alloy containing Ag, Pd, or Cu). The above-mentioned metal alloys such as MAM (a multilayer metal film in which a molybdenum film, an aluminum-neodymium alloy film, and a molybdenum film are laminated in this order) are included.

The thickness of the first electrode layer is not particularly limited as long as the conductivity can be ensured, but is preferably in the range of 15 nm to 10 μm.
In addition, when the first electrode layer is transparent, it is preferable that the transmittance of the first electrode layer in the visible light region is 50% to 99%, and above all, the transmittance is 70%. It is preferable that it is the thickness used as% -95%.
This is because it is easy to form the first electrode layer with a uniform thickness when the thickness of the first electrode layer is within the above range. In addition, the manufacturing cost can be reduced.
The transmittance measurement method can be the same as the transmittance measurement method of the first substrate.

  The first electrode layer may have a pattern shape, may cover all of one surface of the first substrate, and may have a shape of a pixel electrode in a general display device. When the first electrode substrate is used on the display surface side of the cell type electrophoretic display device, the first electrode layer is usually used as a common electrode, and when used on the back side, the first electrode layer is a pixel electrode. Usually, it has a pattern of a display image.

  The method for forming the first electrode layer is not particularly limited as long as it can be formed to have a desired thickness and pattern, and a general electrode film forming method can be used. it can. Specifically, PVD methods such as vacuum vapor deposition, sputtering, and ion plating, CVD, methods of applying a conductive paste, inkjet, screen printing, flexographic printing, and the like can be given. In particular, when a transparent electrode layer is formed as the first electrode layer, it is preferable to use a sputtering method, a vacuum evaporation method, or a CVD method.

(C) 1st electrode substrate Although the 1st electrode substrate in this process has the said 1st substrate and 1st electrode layer, it may have another structure as needed.
For example, when the first electrode substrate used in this step is used on the display surface side of the cell-type electrophoretic display device, as the functional layer, for example, a barrier layer such as a barrier film, a transparent inorganic vapor deposition film, an ultraviolet cut film, An antiglare layer (AG layer), a scratch prevention layer (HC layer), an antireflection layer (AR layer), or the like is used. When the first electrode substrate is used on the back side of the cell type electrophoretic display device, for example, a barrier layer such as a barrier film or a transparent inorganic vapor deposition film, an ultraviolet cut film, or the like is used as the functional layer.

(3) Partition Wall The partition wall in this step is formed on the first electrode substrate, and partitions cells that enclose the display medium. The shape of the cell partitioned by the partition wall is not particularly limited as long as desired information can be displayed. For example, there are many shapes such as a circle, a lattice, a hexagon, and a triangle. It can be a square or the like.
Moreover, all the cells may have the same shape in plan view, or the shape in plan view may be different for each cell. Moreover, all the sizes of the cells may be the same or may be different for each cell.

The thickness of the partition wall can be in the range of 5 μm to 100 μm, and preferably in the range of 10 μm to 50 μm. This is because, when the thickness is within the above-described range, it is possible to achieve sufficient display characteristics, particularly excellent contrast. In addition, the driving voltage is low and the display device can be thin.
Examples of the cross-sectional shape of the partition wall include a rectangle and a trapezoid.

The width of the partition wall in plan view, i.e., the distance separating adjacent cells is not particularly limited as long as it can stably hold the display medium sealed in the cells. It is preferably in the range of 1 μm to 50 μm, more preferably in the range of 5 μm to 40 μm, and particularly preferably in the range of 10 μm to 30 μm. This is because the display medium can be stably sealed when the width is within the above-described range.
In addition, the said width | variety is specifically shown by w as described in FIG.1 (e).

Moreover, it is preferable that the pattern aperture ratio of the said partition part is high. This is because the area per unit cell partitioned by the partition wall is increased, so that the image display area is increased and high contrast can be obtained. Specifically, the pattern aperture ratio is preferably 70% or more, and particularly preferably 90% or more.
At this time, the size of the cells partitioned by the partition walls is preferably in the range of 0.05 mm to 1 mm, particularly in the range of 0.1 mm to 0.5 mm, as the cell pitch.
The cell pitch refers to the distance between the centers of adjacent cells.

  The material constituting the partition wall is not particularly limited as long as it can stably enclose the electrophoretic body and the liquid medium, but is not limited to a dry material composed of a thermosetting resin, a photosensitive resin, or a photosensitive resin. A film resist etc. can be mentioned. In particular, a dry film resist made of a photosensitive resin is preferable because a partition wall for forming a cell having a desired shape can be easily formed using a photolithography method. The photosensitive resin is preferably a negative photosensitive resin, and examples thereof include a photosensitive polyimide resin, an acrylic resin, a photosensitive phenol resin, a photosensitive epoxy resin, a novolac resin, and a melamine resin.

The method for forming the partition wall in this step is not particularly limited as long as the partition wall having a desired shape can be accurately formed on the first electrode substrate, and a general cell-type electrophoretic display device. The same method can be used.
Specifically, a dry film resist film is laminated on the entire surface of the first electrode substrate having the first electrode layer, and exposure and development are performed on the entire surface of the first electrode substrate having the first electrode layer. A mold transfer method in which a material constituting the partition wall is applied and the concavo-convex plate is pressed, a printing method in which printing is performed using the material constituting the partition wall, and the like can be used. It is also possible to use a method in which a meshed structure is separately formed using the material constituting the partition wall and bonded to the surface of the first electrode substrate having the first electrode layer as the partition wall. It is.
In addition, it does not specifically limit about the conditions in various formation methods, It sets suitably according to the material which comprises the partition part used.

  In order to improve the adhesion to the adhesive layer, the partition wall may be subjected to a surface treatment such as ultraviolet irradiation or plasma treatment, or a primer layer may be formed.

(4) Transfer step In this step, a transfer substrate is formed on an end portion of the partition wall portion formed on the surface of the first electrode substrate on the side opposite to the first electrode substrate. The method of bonding the surfaces on which the adhesive is disposed is not particularly limited as long as the end of the partition wall and the adhesive on the transfer substrate can be stably bonded, but the transfer is not limited. A method in which a pressure is applied between the substrate and the partition wall and the adhesive is heated to a predetermined heating temperature can be preferably used.

The method for applying pressure between the transfer substrate and the partition wall is not particularly limited as long as the end of the partition wall and the adhesive of the transfer substrate can be stably bonded. By disposing the transfer substrate on the end of the partition wall opposite to the electrode substrate or by disposing the first electrode substrate on which the partition wall is formed on the transfer substrate, only the weight of the transfer substrate or the A method of adding only the weight of the first electrode substrate and the partition wall, and bonding the surface of the transfer substrate on which the adhesive is disposed to the end of the partition wall opposite to the first electrode substrate, and then transferring the transfer substrate. In addition, a method of applying a pressing force between the first electrode substrates on which the partition walls are formed can be used.
Specifically, the pressing force is preferably within a range of 0.01 MPa to 0.7 MPa, and more preferably within a range of 0.1 MPa to 0.4 MPa.
This is because the adhesive can be sufficiently transferred from the transfer substrate when the pressing force is within the above range. In addition, the adhesive on the transfer substrate can be prevented from being crushed and entering the cell.

  The heating temperature of the adhesive is not particularly limited as long as it is equal to or higher than the softening temperature of the adhesive and can stably bond the end of the partition wall and the adhesive of the transfer substrate. However, among them, it is preferable that the temperature is high within the range of 10 ° C to 100 ° C from the softening temperature of the adhesive, and in particular, the temperature is high within the range of 20 ° C to 80 ° C from the softening temperature of the adhesive. It is preferable. This is because when the heating temperature is within the above range, the end of the partition wall and the adhesive of the transfer substrate can be stably bonded.

  The formation place of the adhesive layer formed by this step is usually on the end portions of all the partition walls. However, as long as the effects of the present invention are exhibited, the adhesive layer is formed only on the end portions of some partition walls. It may be a thing. For example, it may be formed only on the edge of the partition wall at the peripheral edge.

  In this step, the method of peeling the transfer substrate from the partition wall is a method of peeling the transfer substrate from the partition wall at a non-adhesion speed that is a speed at which the adhesive does not adhere to the cell.

Here, the non-adhesion speed is a speed at which the adhesive does not adhere to the cell, and more specifically, when the transfer substrate is peeled off from the end of the partition wall, the partition is separated by the partition wall. This means a speed at which the adhesive stretched between the partition wall and the transfer substrate can be prevented from being drawn into the cell by the reduced pressure inside the cell.
The main factors affecting the speed are considered to be the type of adhesive and the temperature of the adhesive at the time of peeling.
For this reason, the above speed can be obtained by performing a test for confirming whether or not the adhesive has adhered to the cell by changing the peeling speed with respect to the type of adhesive and the temperature at the time of peeling. it can.
In addition, it can be considered as other factors that affect the speed as necessary, with respect to the planar view area of the cell, the width of the partition wall (width of the adhesive layer), the ambient environment (pressure) where this step is performed, etc. Alternatively, a test for confirming the presence or absence of adhesion of the adhesive in the cell by changing the peeling speed in various ways may be performed.

Specifically, the thermoplastic resin is a polyester resin having a softening temperature in the range of 40 ° C to 130 ° C, and the temperature of the adhesive in the transfer step is 10 ° C to 100 ° C higher than the softening temperature of the adhesive. When the temperature is high within the range, the non-adhesion speed is preferably 5 m / min or more and less than 60 m / min, and particularly preferably within the range of 5 m / min to 50 m / min. In particular, it is preferably in the range of 10 m / min to 50 m / min. This is because, when the speed is in the above range, the adhesive can be stably prevented from adhering in the cell. This is because it is easy to stably form the adhesive layer on the end of the partition wall.
In this step, the thermoplastic resin is a urethane resin having a softening temperature in the range of 40 ° C. to 150 ° C., and the temperature of the adhesive in the transfer step is 10 ° C. to the softening temperature of the adhesive. When the temperature is high in the range of 100 ° C., the non-adhesion speed is preferably 5 m / min or more and less than 60 m / min, and in particular, it is in the range of 5 m / min to 50 m / min. In particular, it is particularly preferably in the range of 10 m / min to 50 m / min. This is because, when the speed is in the above range, the adhesive can be stably prevented from adhering in the cell.

  The position of the partition wall where the transfer substrate starts to peel in this step is not particularly limited as long as the adhesive does not adhere to the cell, and is formed on the first electrode substrate. The transfer substrate may be peeled off from all the partition walls at the same time, but the transfer substrate is usually peeled off from the partition wall located on the outer periphery of the first electrode substrate.

  The ambient environment in which this step is performed is usually performed under atmospheric pressure.

The thickness of the adhesive layer formed in this step is not particularly limited as long as it can stably adhere between the partition wall formed on the first electrode substrate and the second electrode substrate. However, it is preferably within a range of 1 μm to 100 μm, more preferably within a range of 1 μm to 50 μm, and particularly preferably within a range of 1 μm to 10 μm.
This is because, when the film thickness is within the above-described range, the partition wall and the second electrode substrate can be bonded together with a sufficient adhesive force, and good display characteristics can be obtained. Further, it is possible to suppress the cell type electrophoretic display device from being thick and to have a low driving voltage.
The film thickness refers to the thickness of an adhesive layer made of an adhesive remaining on the end of the partition wall on the side opposite to the electrode substrate after this step, and from the top of the partition wall to the adhesive layer. The distance to the top of

2. Manufacturing method of cell-type electrophoretic display device The manufacturing method of the cell-type electrophoretic display device of the present invention includes at least the transfer step, but usually a partition formed on the first electrode substrate after the transfer step. A display medium filling step of filling the display medium into a plurality of cells partitioned by the unit, a bonding step of bonding the first electrode substrate and the second electrode substrate, and the like.
Further, if necessary, an electrode substrate forming step for forming the first electrode substrate and the second electrode substrate, and the periphery of the cell-type electrophoretic display medium layer sandwiched between the first electrode substrate and the second electrode substrate are sealed. A sealing step, a removal step of removing a part of the other electrode substrate opposed to expose a part of the electrode layer on one electrode substrate as a lead electrode, and a drive device for supplying power to the lead wiring from the outside There may be other steps such as a drive device installation step for attaching the functional layer, a functional layer installation step such as a barrier film. Note that such other steps can be the same as those generally used in a cell-type electrophoretic display device, and thus description thereof is omitted here.

(1) Display medium filling process In the display medium filling process of the present invention, a display medium is formed in a plurality of cells partitioned by partition walls formed on the surface of the first electrode substrate on which the first electrode layer is formed. Is a step of filling.

The display medium in this step includes at least one kind of electrophoretic body and liquid medium.
As the electrophoretic body, colored, colorless, or white inorganic pigment particles or organic pigment particles can be used. Inorganic pigment particles include lead white, zinc white, lithopone, titanium dioxide, zinc sulfide, antimony oxide, calcium carbonate, kaolin, mica, barium sulfate, gloss white, alumina white, talc, silica, calcium silicate, cadmium yellow, Cadmium lithopone white, yellow iron oxide, titanium yellow, titanium barium yellow, cadmium orange, cadmium lithopone orange, molybdate orange, bengara, red lead, silver vermilion, cadmium red, cadmium lithopone red, amber, brown iron oxide, zinc Iron chrome brown, chrome green, chromium oxide, pyridian, cobalt green, cobalt chrome green, titanium cobalt green, bitumen, cobalt blue, ultramarine, cerulean blue, cobalt aluminum blue, koval Violet, carbon black, iron black, manganese ferrite black, cobalt ferrite black, copper chrome black, copper chrome manganese black, black low-order titanium oxide (titanium black), aluminum powder, copper powder, lead powder, tin powder, zinc powder, etc. Can be used. Organic pigment particles include fast yellow, disazo yellow, condensed azo yellow, anthrapyrimidine yellow, isoindoline yellow, copper azomethine yellow, quinophthaloin yellow, benzimidazolone yellow, nickel dioxime yellow, monoazo yellow lake, dinitro Aniline Orange, Pyrazolone Orange, Perinone Orange, Naphthol Red, Toluidine Red, Permanent Carmine, Brilliant Fast Scar Red, Pyrazolone Red, Rhodamine 6G Lake, Permanent Red, Resol Red, Bon Lake Red, Lake Red, Brilliant Carmine, Bordeaux 10B, Naphthol Red, Quinacridone Magenta, Condensed Azo Red, Naphthol Carmine, Perylene Scar Red, Condensed Acetate Scarred, benzimidazolone carmine, anthraquinonyl red, perylene red, perylene maroon, quinacridone maroon, quinacridone scarred, quinacridone red, diketopyrrolopyrrole red, benzimidazolone brown, phthalocyanine green, Victoria blue lake, phthalocyanine blue, Fast sky blue, alkali blue toner, indanthrone blue, rhodamine B lake, methyl violet lake, dioxazine violet, naphthol violet and the like. Moreover, you may use individually or two or more types as an electrophoretic body.

The liquid medium is not particularly limited as long as it can stably disperse the electrophoretic body, and a dispersion liquid or the like generally used for an electrophoretic display device using a cell type electrophoretic display medium layer may be used. it can.
The dispersion is not particularly limited as long as the electrophoretic material is uniformly dispersed, and a known dispersion can be used. Specifically, aromatic hydrocarbons include alkylbenzene derivatives such as benzene, toluene, xylene, ethylbenzene, dodecylbenzene, phenylxylylethane, 1,1-ditolylethane, 1,2-ditolylethane, 1,2-bis (3 , 4-dimethylphenylethane) (BDMF) and the like, alkylnaphthalene derivatives such as diisopropylnaphthalene, alkylbiphenyl derivatives such as monoisopropylphenyl, isopropylphenyl and isoamylbiphenyl, terphenyl derivatives hydrogenated at various ratios , Triallyldimethane derivatives such as dibenzyltoluene, benzylnaphthalene derivatives, phenylene oxide derivatives, diallyalkylene derivatives, allylindane derivatives, polychlorinated biphenyl derivatives, naphthenic charcoal Hydrogen and the like. Also, aliphatic hydrocarbons such as hexane, cyclohexane, kerosene, isobar, paraffinic hydrocarbons, halogenated hydrocarbons such as chloroform, trichloroethylene, tetrachloroethylene, trifluoroethylene, tetrafluoroethylene, dichloromethane, ethyl bromide, phosphorus Phosphate esters such as tricresyl acid, trioctyl phosphate, octyl diphenyl phosphate, tricyclohexyl phosphate, phthalates such as dibutyl phthalate, dioctyl phthalate, diuracil phthalate, dicyclohexyl phthalate, butyl oleate, diethylene glycol Dibenzoate, dioctyl sebacate, dibutyl sebacate, dioctyl adipate, trioctyl trimellitic acid, acetyltriethylene citrate, octyl maleate, male In dibutyl carboxylic acid esters such as ethyl acetate, chlorinated paraffin, N, N-dibutyl-2-butoxy-5-tert-octyl aniline, and the like. Moreover, in this invention, said dispersion liquid can be used individually or in mixture of 2 or more types.

The display medium may contain a dye or the like in addition to the electrophoretic body and the liquid medium.
There is no restriction | limiting in particular as said dye, A well-known dye can be used. Specifically, Spirit Black (SB, SSBB, AB), Nigrosine Base (SA, SAP, SAPL, EE, EEL, EX, EXBP, EB), Oil Yellow (105, 107, 129, 3G, GGS), Oil Orange (201, PS, PR), Fast Orange, Oil Red (5B, RR, OG), Oil Scarlet, Oil Pink 312, Oil Violet # 730, Macrolex Blue RR, Sumiblast Green G, Oil Brown (GR, 416) ), Sudan Black X60, Oil Green (502, BG), Oil Blue (613, 2N, BOS), Oil Black (HBB, 860, BS), Bali First Yellow (1101, 1105, 3108, 4120), Bali First Orange (320 3210), varifast red (1701l, 1702), varifast black (1802, 1807, 3804, 3810, 3820, 3830) and the like by appropriately selecting and containing dyes such as yellow, magenta and cyan. It can be a display medium.

  The method for filling the display medium is not particularly limited as long as the display medium can be filled into the cells defined by the partition walls, and for example, the following method can be used. First, the display medium is dropped from a dispenser, an inkjet, a die coat, or the like onto the first electrode substrate on which the upper partition wall is formed, and the display medium is made uniform in the surface by a central squeegee, a doctor blade, a doctor knife, or the like. After coating, scrape off the excess display medium that protrudes from the cell with a squeegee or doctor blade, doctor knife, etc., and finally scrape off the excess display medium gathered on one side with a wiper. A method of enclosing the display medium in the inside can be used.

  Moreover, as a timing which implements this process, it should just be before the said bonding process, and it may be before or after the said transfer process, but it is usually after the said transfer process.

(2) Bonding step The bonding step in the present invention is a step of bonding the first electrode substrate and the second electrode substrate.

(A) Second electrode substrate The second electrode substrate in this step has a second substrate and a second electrode layer formed on one surface of the second substrate.
The second electrode substrate may be used on either the display surface side or the back surface side.
Since the second substrate and the second electrode layer can be the same as the first substrate and the first electrode layer included in the first electrode substrate, description thereof is omitted here.

(B) Bonding method Although it does not specifically limit as a bonding method of a 1st electrode substrate and a 2nd electrode substrate, For example, the surface in which the 2nd electrode layer of a 2nd electrode substrate is formed, and a 1st electrode substrate The partition wall portion formed on the first electrode substrate is heated by facing the surface on which the partition wall portion is formed and contacting with a predetermined pressing force and heating the adhesive layer to a predetermined temperature. It can bond through the contact bonding layer provided on the edge part on the opposite side to the said electrode substrate. At this time, it is assumed that the display medium is filled in the cells partitioned by the partition walls.
The temperature of the adhesive layer is not particularly limited as long as it can accurately bond between the first electrode substrate and the second electrode, and “(4) Transfer step” in “1. Transfer step” above. It can be the same as the heating temperature of the adhesive described in the section.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples.

[Example 1]
1. Formation of partition wall A partition wall was formed on the first electrode substrate by the following method.
A negative photosensitive resin material (DuPont) is formed on a first electrode substrate in which a Cu electrode formed in a pattern as a first electrode layer is provided on a polyethylene terephthalate (PET) film (manufactured by Teijin DuPont) having a thickness of 100 μm. MRC Dry Film Resist Co., Ltd. (Dry Film Resist) was laminated to a thickness of 30 μm, heated at 100 ° C. for 1 minute, and then exposed using an exposure mask (exposure 500 mJ / cm ² ), and thereafter, development with a 1% KOH aqueous solution was performed for 30 seconds to form a partition wall portion on the first electrode substrate. The obtained partition wall portion had a thickness of 30 μm and a width of 20 μm. The planar view shape of the cells partitioned by the partition wall portion was a honeycomb shape, and the planar view area of the cells was 80000 μm ² .

2. Formation of Adhesive Layer An adhesive containing a thermoplastic resin (polyester resin) as a main component on one surface of a polyethylene terephthalate (PET) film having a thickness of 50 μm (Byron 500 manufactured by Toyobo Co., Ltd., softening temperature 114 ° C.) is 10 μm thick. A coated transfer substrate is prepared, and the transfer substrate is placed on the end of the partition wall on the side opposite to the first electrode substrate so that the adhesive side is in contact with the top of the partition wall on the side opposite to the first electrode substrate. It was. In this state, while applying a predetermined pressing force (1 kPa), the adhesive was heated to 130 ° C. (softening temperature + 16 ° C.), which is a temperature exceeding the softening temperature. Thereafter, the transfer substrate was peeled from the partition wall at a peeling speed of 5 m / min.
The thickness of the adhesive layer formed on the end of the partition wall opposite to the first electrode substrate was 10 μm.

3. Formation of Cell Type Electrophoretic Display Medium Layer A display medium (ink) having the following components is dropped from a dispenser on the surface side of the first electrode substrate having a partition wall, and a squeegee treatment is performed using a urethane squeegee located at the center. Then, each cell was filled with ink. The excess ink was scraped off using a urethane squeegee located at both ends, and further wiped off with a roll wiper.

<Display medium (ink) component>
・ Electrophoretic particles (titanium dioxide): 60 parts by weight ・ Dispersion: 40 parts by weight

4). Production of Second Electrode Substrate An indium tin oxide (ITO) vapor deposition film (thickness 0.2 μm) is formed as a transparent electrode on one surface of a 100 μm thick polyethylene terephthalate (PET) film (supporting substrate made by Teijin DuPont). A second electrode substrate formed into a film was prepared.

5. Fabrication of Cell Type Electrophoretic Display Device The second electrode layer of the second electrode substrate is formed on the adhesive layer provided on the opposite end of the partition wall formed on the first electrode substrate to the first electrode substrate. Until the surface of the adhesive layer reaches 130 ° C. (softening temperature + 16 ° C.) while applying a predetermined pressing force under atmospheric pressure (normal pressure atmosphere). Warmed up.
Thereby, the 1st electrode substrate and the 2nd electrode substrate were pasted up via the adhesion layer.

After that, it is cut into a predetermined size, and a UV curable resin (LCB-610, manufactured by EACH Sea Co., Ltd.) is applied to the periphery of the first electrode substrate and the second electrode substrate using a dispenser. It was cured by exposure (exposure amount 700 mJ / cm ² ), and sealed to obtain a cell type electrophoretic display device.

[Example 2]
A cell-type electrophoretic display device was obtained in the same manner as in Example 1 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 10 m / min.

[Example 3]
A cell-type electrophoretic display device was obtained in the same manner as in Example 1 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 20 m / min.

[Example 4]
A cell-type electrophoretic display device was obtained in the same manner as in Example 1 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 30 m / min.

[Example 5]
A cell-type electrophoretic display device was obtained in the same manner as in Example 1 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 40 m / min.

[Example 6]
A cell type electrophoretic display device was obtained in the same manner as in Example 1 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 50 m / min.

[Example 7]
As an adhesive, an adhesive (UE-3220 manufactured by Unitika Ltd., softening temperature 60 ° C.) containing a thermoplastic resin (polyester resin) as a main component is used, and bonding between the first electrode substrate and the second electrode substrate is performed during transfer. A cell-type electrophoretic display device was obtained in the same manner as in Example 1 except that the heating temperature of the adhesive was 110 ° C. (softening temperature + 50 ° C.).

[Example 8]
A cell-type electrophoretic display device was obtained in the same manner as in Example 7, except that the heating temperature of the adhesive during transfer was 150 ° C. (softening temperature + 90 ° C.).

[Example 9]
A cell-type electrophoretic display device was obtained in the same manner as in Example 8 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 50 m / min.

[Example 10]
As an adhesive, an adhesive (Nipporan 3116, softening temperature 75 ° C.) containing a thermoplastic resin (urethane resin) as a main component is used, and an adhesive at the time of transfer and bonding between the first electrode substrate and the second electrode substrate A cell-type electrophoretic display device was obtained in the same manner as in Example 1 except that the heating temperature was 90 ° C. (softening temperature + 15 ° C.).

[Example 11]
As an adhesive, an adhesive (Nipporan 3110, softening temperature 45 ° C.) containing a thermoplastic resin (urethane resin) as a main component is used, and at the time of bonding between the adhesive during transfer and the first electrode substrate and the second electrode substrate A cell type electrophoretic display device was obtained in the same manner as in Example 1 except that the heating temperature was 100 ° C. (softening temperature + 55 ° C.).

[Example 12]
A cell-type electrophoretic display device was obtained in the same manner as in Example 11 except that the heating temperature of the adhesive during transfer was 140 ° C. (softening temperature + 95 ° C.).

[Example 13]
A cell-type electrophoretic display device was obtained in the same manner as in Example 10 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 50 m / min.

[Example 14]
A cell-type electrophoretic display device was obtained in the same manner as in Example 12 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 50 m / min.

[Comparative Example 1]
A cell type electrophoretic display device was obtained in the same manner as in Example 1 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 1 m / min.

[Comparative Example 2]
A cell-type electrophoretic display device was tried in the same manner as in Example 1 except that the transfer substrate was peeled from the partition wall at a peeling speed of 60 m / min. However, when the transfer substrate is peeled off, the partition wall is also peeled off from the first electrode substrate. A cell-type electrophoretic display device could not be obtained. It is inferred that the result of peeling the partition wall together with the adhesive as a result of the adhesive becoming hard due to the viscoelasticity of the adhesive due to the excessive peeling speed.

[Comparative Example 3]
A cell-type electrophoretic display device was obtained in the same manner as in Example 8 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 1 m / min.

[Comparative Example 4]
An attempt was made to produce a cell-type electrophoretic display device in the same manner as in Example 8, except that the transfer substrate was peeled off from the partition wall at a peeling speed of 60 m / min. However, when the transfer substrate is peeled off, the partition wall is also peeled off from the first electrode substrate. A cell-type electrophoretic display device could not be obtained. It is inferred that the result of peeling the partition wall together with the adhesive as a result of the adhesive becoming hard due to the viscoelasticity of the adhesive due to the excessive peeling speed.

[Comparative Example 5]
A cell type electrophoretic display device was obtained in the same manner as in Example 10 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 1 m / min.

[Comparative Example 6]
An attempt was made to produce a cell-type electrophoretic display device in the same manner as in Example 10 except that the transfer substrate was peeled from the partition wall at a peeling speed of 60 m / min. However, when the transfer substrate is peeled off, the partition wall is also peeled off from the first electrode substrate. A cell-type electrophoretic display device could not be obtained. It is inferred that the result of peeling the partition wall together with the adhesive as a result of the adhesive becoming hard due to the viscoelasticity of the adhesive due to the excessive peeling speed.

[Comparative Example 7]
A cell-type electrophoretic display device was obtained in the same manner as in Example 12 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 1 m / min.

[Comparative Example 8]
An attempt was made to produce a cell-type electrophoretic display device in the same manner as in Example 12 except that the transfer substrate was peeled off from the partition wall at a peeling speed of 60 m / min. However, when the transfer substrate is peeled off, the partition wall is also peeled off from the first electrode substrate. A cell-type electrophoretic display device could not be obtained. It is inferred that the result of peeling the partition wall together with the adhesive as a result of the adhesive becoming hard due to the viscoelasticity of the adhesive due to the excessive peeling speed.

[Evaluation]
With respect to the cell-type electrophoretic display devices obtained in the examples and comparative examples, it was confirmed whether or not an adhesive entered the cell. The contrast was confirmed visually. The results are shown in Table 1 below. In addition, regarding the evaluation of the presence or absence of the adhesive into the cell, the case where the entry was not confirmed was evaluated as ◯, and the case where the entry was confirmed as x. Regarding the evaluation of the contrast, the case where the contrast was high and good was rated as ◯, and the case where the contrast was low was rated as x. Moreover, the heating temperature in Table 1 is based on the softening temperature, and indicates a temperature difference obtained by subtracting the softening temperature from the heating temperature.

From Table 1, it was confirmed that the cell type electrophoretic display device obtained in the example had no adhesive entering the cell. Also, the contrast was good.
On the other hand, in the cell-type electrophoretic display devices obtained in Comparative Examples 1, 3, 5, and 7, entry of the adhesive into the cell was observed. Also, the contrast was lowered.

DESCRIPTION OF SYMBOLS 1a ... 1st board | substrate 1b ... 1st electrode layer 1 ... 1st electrode board | substrate 2a ... 2nd board | substrate 2b ... 2nd electrode layer 2 ... 2nd electrode board | substrate 3 ... Partition part 4 ... Adhesive layer 5a ... Display medium 5 ... Cell type Electrophoretic display medium layer 10 ... Cell-type electrophoretic display device 11 ... Base material 14 ... Adhesive 20 ... Transfer substrate

Claims (3)

A first electrode substrate having a first electrode layer formed on one surface of the first substrate and the first substrate;
A second substrate and a second electrode layer formed on one surface of the second substrate, wherein the first electrode layer and the second electrode layer are arranged to face the first electrode substrate; A second electrode substrate,
Cell-type electricity in which a display medium containing at least one kind of electrophoretic body and liquid medium is enclosed in a plurality of cells partitioned by a partition formed between the first electrode substrate and the second electrode substrate. An electrophoretic display medium layer;
A method for manufacturing a cell-type electrophoretic display device comprising:
The base material and the heat applied on the base material at the end of the first electrode substrate opposite to the first electrode substrate of the partition wall portion formed on the surface of the first electrode substrate on which the first electrode layer is formed A transfer substrate having an adhesive containing a plastic resin as a main component is bonded to a surface on which the adhesive is disposed, the transfer substrate is peeled off from the partition wall, and the adhesive is transferred onto an end of the partition wall. A transfer step of forming an adhesive layer on the end of the partition wall by
The method of manufacturing a cell-type electrophoretic display device, wherein the transfer step is to peel off the transfer substrate from the partition wall at a non-adhesion speed that is a speed at which the adhesive does not adhere to the cells. The thermoplastic resin is a polyester resin having a softening temperature in the range of 40 ° C to 130 ° C,
The temperature of the adhesive in the transfer step is higher than the softening temperature of the adhesive within a range of 10 ° C to 100 ° C,
The method for manufacturing a cell-type electrophoretic display device according to claim 1, wherein the non-adhering speed is 5 m / min or more and less than 60 m / min. The thermoplastic resin is a urethane resin having a softening temperature in the range of 40 ° C to 150 ° C,
The temperature of the adhesive in the transfer step is higher than the softening temperature of the adhesive within a range of 10 ° C to 100 ° C,
The method for manufacturing a cell-type electrophoretic display device according to claim 1, wherein the non-adhering speed is 5 m / min or more and less than 60 m / min.

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