JP2010271596A - Method for manufacturing panel for information display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel for information display in which long period use of a mask used when a particle group is filled is enabled to improve productivity, and a panel for information display in which positional deviation of a mask is prevented so that a particle group is enabled to be surely dropped in a desired cell, and a method for manufacturing the same. <P>SOLUTION: The method for manufacturing a panel for information display includes: a mask placing step in which when a particle group 3 is filled in a cell 7 on a substrate, a mask MS having an aperture part corresponding to an aperture of a cell 7 is fixed and placed on a partition 4 while performing positiosingoning so that the aperture of the cell corresponds to the aperture part of the mask; a particle group filling step in which the particle group is placed on the mask, a particle moving member PC is moved while the menver is pressed to the mask, and the particle group is filled in the cell on the panel substrate from the aperture part of the mask; and a substrate sticking step in which the two substrates are stuck by adhesive arranged to at least one part of the partition upper plane part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for manufacturing an information display panel that displays information such as an image by driving electrically driveable particle groups as a display medium. More specifically, the present invention relates to a technique for arranging a particle group as a display medium in a cell of an information display panel.

  A liquid crystal display (LCD) is widely used as an information display device. However, it is generally known that liquid crystal display devices have drawbacks such as large power consumption and narrow viewing angle. Therefore, as an alternative to the liquid crystal display device, a plurality of cells partitioned by partition walls are formed between two substrates (for example, glass substrates) at least one of which is transparent, and a display medium configured as a particle group in the cells is provided. There has been proposed an information display panel that encloses or encloses a particle group and an insulating liquid as a display medium and moves the particle group to display information such as an image.

  And, for example, in Patent Document 1, a screen is disposed above the partition wall formed on the panel substrate in a particle filling step executed when manufacturing an information display panel using the above-described particle group as a display medium, Disclosed is a method in which a particle group placed on the screen is dropped from an opening of the screen while moving on the screen with a squeegee, and the particle group is disposed in a cell on a panel substrate corresponding to the opening. Yes.

JP 2007-148381 A

The above-mentioned Patent Document 1 applies a screen printing method, which is one of printing techniques widely known in the past, to the filling of particles, in other words, powder. In general, printing is to print an image on paper or cloth through fine holes provided with liquid ink on a screen. However, what is disclosed in Patent Document 1 is not a liquid, but is that a dried particle group (powder) is dropped from the opening of the screen and filled into a cell (small chamber) provided on the panel substrate. A new and characteristic technique is disclosed.
By the way, in the conventionally known screen printing, the screen is arranged at a distance of several tens of μm to several mm from the surface of a printing object (paper, cloth, etc.) to be printed. This is because when the squeegee is moved, the ink is transferred to the printing medium and immediately leaves the screen.

  In Patent Document 1, a screen used to fill a cell with particles (powder) is followed by conventional screen printing, and the screen is positioned above the partition on the substrate (for example, 3 mm above the partition top surface). Is arranged. Then, it is disclosed that the particles are placed in the cell so that the screen bends and comes into contact with the upper surface of the partition when moved while being pushed with a squeegee. This situation is disclosed in FIGS. 4 and 5 of Patent Document 1. FIG.

  However, when the particles as a display medium of the information display panel are filled in a dry state, the following inconvenience may occur when the above screen is used.

First, a screen having a mask function (hereinafter referred to as a mask) is arranged on the partition formed on the panel substrate so as to be separated from the partition, and the dried particles placed on the mask are squeezed with a squeegee. The particles are dropped from the opening of the mask while moving on the mask. In this way, in the method in which the particle group is arranged in the cell on the panel substrate corresponding to the opening of the mask, a part of the particles pushed by the particle moving member rotates to the part where it touches the partition upper surface on the back side of the mask. It will adhere to the upper surface of the partition as it is. Therefore, an extra step for removing the particles adhering to the upper surface of the partition wall is necessary, and there is a problem that productivity is poor and manufacturing cost is increased.
Note that the “mask function” when filling a cell with a particle group refers to a function that blocks a cell opening that is not desired to be filled with the particle group and prevents the particle group from being filled into the cell. The screen in screen printing does not have this mask function, and the ink also wraps around the back side of the fiber that becomes the non-opening portion, thereby enabling printing on the printing medium together with the ink that has passed through the opening portion. Further, the screen in Patent Document 1 shows a screen having the mask function in addition to the screen in the above-described screen printing, but there is a problem that the mask function cannot be sufficiently exhibited.

  In addition, the mask is arranged apart from the partition wall, and the particle group placed on the mask is moved by a squeegee and dropped from the opening of the mask, and the particles are placed in the cells on the panel substrate corresponding to the opening of the mask. In the method of arranging groups, in the process of moving while pressing the squeegee against the mask, bending and return deformation are repeatedly applied to the mask. As a result, there is a problem that the mask is easily damaged and the mask must be replaced in a short period of time.

  Furthermore, in the process of moving the squeegee while pressing it against the mask, an external force is applied on the mask with respect to the traveling direction of the squeegee. Therefore, even when the mask is placed at a predetermined position so that the particle group falls into the cell from the opening of the mask at the start of filling, the positional deviation occurs and the particle group cannot be dropped to a desired position. There was a case.

  Accordingly, an object of the present invention is to provide particles adhered to the upper surface of the partition wall when a particle group as a display medium of an information display panel is filled in a cell on the panel substrate in a dry state using a mask. An object of the present invention is to propose a method of manufacturing an information display panel that does not need to be removed and that can improve the productivity by enabling long-term use of a mask.

The object is to arrange a display medium configured as a group of electrically drivable particles in a cell surrounded by a partition between substrates on which two substrates, at least one of which is transparent, are arranged to face each other. An information display panel manufacturing method for displaying information by electrically driving a medium, wherein a mask opening corresponding to an opening of the cell is filled when the particle group is filled in the cell on the substrate. A mask placing step of placing and fixing a mask having a portion on the partition wall while positioning so that the opening of the cell and the mask opening correspond to each other, and placing the particle group on the mask A particle group filling step of filling the particle group into the cell on the panel substrate from the opening of the mask by moving the particle moving member while pressing against the mask, and at least a part of the upper surface of the partition wall Arrangement In adhesive can be achieved by the production method of the information display panel, which comprises the steps bonded substrate bonding the two substrates.
In the present application, the term “fixed” means that when the mask is placed on the partition wall, the mask and the partition wall are in contact with each other, and the mask portion of the mask located on the partition wall is fixed so as not to be displaced. means.

  In order to fix the mask while positioning on the partition, the mask is positioned on the partition when the mask is placed on the partition at least on the surface facing the partition. A magnetic material that is attracted by a magnet is arranged on the part, and the magnet is arranged evenly on the entire surface corresponding to the size of the panel substrate to be placed between the panel substrate and the stage on which the panel substrate is placed. The mask is fixed onto the partition by the magnetic material and the magnet, the mask is made of a magnetic material attracted by a magnet, and at least the side of the mask facing the partition When the mask is placed on the partition wall, a magnet is disposed on a portion positioned on the partition wall, and the panel substrate and the stay on which the panel substrate is placed. The magnetic material attracted by the magnet is arranged evenly over the entire surface corresponding to the size of the panel substrate to be placed, and the mask is fixed onto the partition wall by the magnet and the magnetic material. preferable.

  In addition, in order to fix the mask while positioning on the partition, a groove is formed on the surface of the mask facing the partition and at a position corresponding to the partition, and the partition is formed in the groove. The mask is fixed on the partition by being fitted to the groove, and a magnetic material attracted by a magnet is disposed in the groove, and the partition is fitted to the groove, and the panel substrate and the panel The magnet is arranged uniformly on the entire surface corresponding to the size of the panel substrate to be placed between the stage on which the substrate is placed, and the mask is fixed onto the partition wall by the magnet and the magnetic material. In addition, it is preferable that the mask is made of a magnetic material attracted by a magnet.

  The mask opening of the mask is formed to have the same size and shape as the opening of the cell on the substrate, or smaller than the opening of the cell on the substrate, and the substrate. It is preferable that the opening has the same shape as the opening of the cell and has a rounded corner or a circular shape, an elliptical shape, or a racetrack shape, and is smaller than the opening of the cell.

  The information display panel manufactured by the method for manufacturing an information display panel described in any one of the above is excellent in display quality because a predetermined display medium is arranged in a predetermined cell while preventing displacement. In addition, since it is produced efficiently, the manufacturing cost can be suppressed.

  According to the present invention, when a particle group used as a display medium of an information display panel is dried and filled in a cell on a panel substrate using a mask, the particles are moved while the mask is fixed on a partition wall. Move with a member. Thereby, the lifetime of the mask can be extended without repeating the bending deformation and the return deformation of the mask.

  Further, according to the present invention, the particle moving member is moved in a state where the mask is fixed on the partition wall, so that the position of the opening of the mask and the opening of the cell is not shifted, and the particles adhere to the masked partition wall upper surface. The trouble of doing does not occur. Thereby, since the process of removing the particles adhering to the upper surface of the partition wall is not required when the panel substrate is bonded, the productivity is improved and the manufacturing cost can be suppressed.

(A), (b) is the figure shown in order to demonstrate the principle structure of the information display panel suitable to manufacture with the manufacturing method of this invention. (A), (b) is the figure shown in order to demonstrate the other fundamental structure of the information display panel suitable to manufacture with the manufacturing method of this invention. (A), (b) is the figure shown in order to demonstrate the other fundamental structure of the information display panel suitable to manufacture with the manufacturing method of this invention. It is the side block diagram which showed typically the mask which can be employ | adopted suitably with the manufacturing method of this invention. (A), (b) is a figure for demonstrating Example 1 of the manufacturing method of the information display panel which concerns on this invention. It is the figure shown about the preferable shape of the plate-shaped mask employ | adopted with the manufacturing method of Example 1, (a) is a top view which showed the mode of the cell opening on a panel board | substrate, (b) respond | corresponds to a cell opening. It is the figure which showed the mask which made it open and formed the opening part of the mask. (A)-(d) is the figure shown in order to demonstrate an example of the relationship between the opening part shape of a mask, and the cell shape of a partition, respectively. It is a figure for demonstrating Example 2 of the manufacturing method of the information display panel which concerns on this invention. It is a figure for demonstrating Example 3 of the manufacturing method of the information display panel which concerns on this invention. It is the figure shown about the preferable shape of the plate-shaped mask employ | adopted with the manufacturing method of Example 4, (a)-(c) demonstrates an example of the relationship between the opening part shape of a mask, and the cell shape of a partition, respectively. It is the figure shown in order to do. (A)-(g) is the figure shown in order to demonstrate an example of the relationship between the opening part shape of the mask used in Example 4, and the cell shape of a partition, respectively. It is the figure shown about the preferable shape of the plate-shaped mask employ | adopted with the manufacturing method of Example 5, (a)-(c) demonstrates an example of the relationship between the opening part shape of a mask, and the cell shape of a partition, respectively. It is the figure shown in order to do.

First, as an example of an information display panel that drives a particle group including electrically drivable particles as a target of the present invention as a display medium, a basic configuration of an information display panel of a charged particle movement type will be described. To do.
In the charged particle movement type information display panel, an electric field is applied to a display medium configured as a particle group including charged particles enclosed in a space between two opposing substrates. Along with the applied electric field direction, the display medium is attracted by an electric field force or a Coulomb force, and the display medium is moved by a change in the electric field direction, whereby information such as an image is displayed. Therefore, it is necessary to design the information display panel so that the display medium can be moved uniformly and the stability when the display information is rewritten repeatedly or when the display information is continuously displayed can be maintained. Here, the force applied to the particles constituting the display medium may be a force due to an electric field, a force attracting each other by a Coulomb force between particles, an electric mirror image force between an electrode and a substrate, an intermolecular force, a liquid crosslinking force, gravity, and the like. .

  Hereinafter, an example of an information display panel of a charged particle movement system that is preferably manufactured by the manufacturing method of the present invention will be described with reference to FIGS. 1 (a), (b) to 3 (a), (b).

  In the example shown in FIGS. 1A and 1B, at least two types of display media, each of which includes particles having at least optical reflectivity and chargeability, and have different optical reflectivities and charge characteristics from each other. (Shown here is a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium 3B configured as a particle group including positively charged black particles 3Ba) between the substrates, In each cell 7 formed by the partition walls 4, the electrode 5 (line electrode) provided on the panel substrate 1 and the electrode 6 (line electrode) provided on the substrate 2 are arranged between pixel electrode pairs formed so as to cross each other at right angles. It moves perpendicularly to the panel substrates 1 and 2 according to the electric field generated by applying the voltage. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 1A, or the black display medium 3B is visually recognized by the observer as shown in FIG. 1B. Are displayed in a matrix with black and white dots. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 2 (a) and 2 (b), at least two types of display media, each of which includes particles having at least optical reflectivity and chargeability, and have different optical reflectivity and charging characteristics from each other. (Shown here is a white display medium 3W configured as a particle group including negatively charged white particles 3Wa and a black display medium 3B configured as a particle group including positively charged black particles 3Ba) between the substrates, In each cell 7 formed by the partition walls 4, a voltage is applied between an electrode pair formed by an electrode 5 (pixel electrode with TFT) provided on the panel substrate 1 and an electrode 6 (common electrode) provided on the substrate 2. According to the electric field generated by this, the panel substrates 1 and 2 are moved vertically. Then, the white display medium 3W is visually recognized by the observer as shown in FIG. 2A, or the white display is displayed by the observer, or the black display medium 3B is visually recognized by the observer as shown in FIG. 2B. Are displayed in a matrix with black and white dots. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 3A and 3B, a display medium having a charging characteristic in an insulating blue liquid (here, a white display medium 3W configured as a particle group including negatively charged white particles 3Wa is used. In each cell formed by the partition walls 4, a pixel electrode pair formed by the electrode 5 (pixel electrode with TFT) provided on the substrate 1 and the electrode 6 (common electrode) provided on the substrate 2 facing each other is shown. The active drive system is configured to move vertically with respect to the substrates 1 and 2 in accordance with an electric field generated by applying a voltage. In this configuration, the white display medium 3W is visually recognized by an observer as shown in FIG. 3A, or the blue color is displayed by allowing the observer to visually recognize an insulating blue liquid as shown in FIG. 3B. Display the display. In addition, in FIG. 3 (a), (b), the partition in front is abbreviate | omitted. As the insulating liquid, petroleum oils such as paraffin oil and naphthen oil, and various oils such as plant oils can be used. A colored insulating liquid in which various pigment-based colorants are dispersed in these oils is used, and this colored insulating liquid is used in combination with a display medium configured as a group of particles containing charged particles of a different color.

  As the panel substrates 1 and 2, substrates such as a glass substrate, a resin sheet substrate, and a resin film substrate can be used. The substrate 2 on the display surface side (observation side) is a transparent substrate. When an electrode for applying a voltage having a predetermined voltage and polarity (positive / negative) (common electrode or line electrode 5 described in FIG. 1 or the like) is disposed in the information display screen area of the substrate 2 Is a transparent electrode. A pixel electrode or a line electrode with a thin film transistor (TFT) is formed on the surface of the panel substrate 1 constituting the information display panel shown in FIGS. 1 and 2 so as to constitute a matrix electrode pair. When a voltage is applied to the counter electrode pair, the above-described structure in which a desired display is performed by moving by applying an electric field to the display medium (particle group) can be realized.

The manufacturing method according to the present invention can be suitably applied to an information display panel having the structure shown in FIGS. 1A, 1B to 3A, 3B. A feature of the method for manufacturing an information display panel according to the present invention is that, in filling a cell with particles as a display medium, first, a step of placing the mask on the partition wall while fixing the mask (mask mounting). Placing the particle group as a display medium on the mask in a dry state, moving the particle moving member while pressing it against the mask, and filling the particle group into the cell (particle group filling step). And a step of bonding two panel substrates together with an adhesive disposed on the upper surface of the partition wall (substrate bonding step).
As described above, in the conventional case where the mask is arranged away from the partition wall, the life of the mask is shortened because the mask is repeatedly bent and returned by the movement of the particle moving member. On the other hand, according to the manufacturing method of the present invention, since the particle moving member is moved after the mask is fixed while being positioned on the partition wall, deformation of the mask is suppressed. Accordingly, the life of the mask can be extended, and thereby the productivity can be improved and the manufacturing cost can be reduced. In addition, since the mask is fixed on the partition wall and does not move, positional displacement between the opening of the mask and the cell opening hardly occurs, and a desired particle group can be reliably arranged in the desired cell.
Hereinafter, the manufacturing method of the information display panel according to the present invention will be described in detail with reference to the drawings.

FIG. 4 is a side configuration diagram schematically showing a mask MS that can be suitably employed in the manufacturing method of the present invention. FIG. 4 shows the positional relationship between the mask MS and the partition 4 arranged on the panel substrate 1 (here, the panel substrate 1 is used as an example to omit other components such as electrodes). It is shown.
The mask MS includes a mask main body MB, a frame body MF provided on the outer periphery thereof, and a tension applying member MT that generates tension by being interposed between the mask main body MB and the frame body MF. The mask body MB is a thin sheet. A fine opening MH is formed in the mask body MB to allow a particle group serving as a display medium to pass therethrough. It is necessary to provide such a mask body MB in a state where the mask body MB is uniformly stretched when filling the particle group. As a structure for that purpose, the frame MF and the tension applying member MT are provided.

  The frame MF has a skeleton structure that is slightly larger than the peripheral edge of the mask main body MB and is formed in a thin annular shape with a hard material such as metal. A uniform tension is applied to the entire mask body MB by interposing a sheet material such as an elastic cloth or a resin film as the tension applying member MT between the frame MF and the mask body MB. More specifically, the frame MF includes a plurality of tension applying members MT, and the frame MF is formed of a highly rigid material that is unlikely to warp or distort. Preferably, a metal material such as stainless steel, iron, aluminum alloy, brass, and a plastic material such as polyimide (PI), polyethyl ether ketone (PEEK), polypropylene (PP), etc., having a hollow structure, A non-solid structure or an epoxy resin reinforced with glass fiber is used.

In particular, as shown in FIG. 4, since the frame MF is designed to be larger than the partition located on the outermost periphery of the partition of the panel substrate 1, the mask MS is positioned from the position shown in FIG. Can be lowered, the uniformly stretched mask body MB can be brought into close contact with the upper surface of each partition wall 4.
As the tension imparting member MT, in addition to a fabric-like or fabric-like one disposed around the entire periphery of the mask body MB, a plastic partially disposed evenly with respect to the periphery of the mask body MB, There are so-called spring-like elastic bodies such as those in which elastic materials such as rubber and metal are formed into a sheet, and those in which elastic materials such as plastic, rubber and metal are formed into a coil. The fibers constituting the cloth-like or woven-like tension applying member include chemically synthesized fibers such as polyester fibers and polyarylate fibers, natural fibers such as cotton and silk, stainless fine wires, nickel-chromium alloy (Ni-Cr) fine wires, etc. Metal fibers or the like are used. The thickness (wire diameter) of the fiber depends on the material, but fibers in the range of 15 μm to 200 μm are used. Sheet-like elastic materials include nylon, polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), polyimide (PI), polyurethane (PU), and other resin materials, and rubbers such as natural rubber and various synthetic rubbers. System materials and metal materials such as stainless steel, aluminum, and aluminum alloys are used.

  The mask MS described below has the same configuration as that described in FIG. 4 and the mask main body MB is placed in contact with the partition wall. The illustration and description of the imparting member MT portion will be omitted, and the description will focus on the features of the invention.

Example 1
FIGS. 5A and 5B are views for explaining Example 1 of the method for manufacturing the information display panel according to the present invention. In FIG. 5, the panel substrate 1 is simplified and only the partition walls 4 are shown as in FIG. Further, as described above, the mask MS shows only the mask body MB. FIG. 5A shows a placement step in which the mask MS is lowered and placed on the partition wall 4. By this step, the mask MS can be placed in contact with the upper surface of the partition wall 4.
After that, as shown in FIG. 5B, the dried particle group 3 (corresponding to the white display medium 3W and black display medium 3B in FIGS. 1 and 2) is placed on the mask MS to move the particles. The member PC can be moved while being pressed against the mask MS to be filled into the cell 7 on the panel substrate 1 from the opening MH of the mask.

As a material for the mask MS, a metal mask using a metal such as stainless steel (SUS), aluminum, iron, or copper, a resin mask using a general-purpose plastic, a mask combining a metal and a resin, or the like may be used. it can. An insulating member is provided on a part of the surface of the conductive metal mask to form a metal mask partially having a non-conductive portion, or a resin mask in which at least the surface is made conductive by providing a conductive member on the surface of the resin mask. Also good.
Furthermore, the mask MS used in the present invention is a surface on the side facing the partition 4 and a portion located on the partition 4 when the mask MS is placed on the partition 4 (hereinafter referred to as mask). The magnetic material 11 that is attracted to the magnet is disposed in the part MP). Stainless steel (SUS), nickel, iron, or the like can be used as the magnetic material attracted to the magnet.

  In the case of the first embodiment, magnets 12 are evenly arranged on the entire surface corresponding to the size of the panel substrate to be placed between the panel substrate 1 and the stage 10 shown in FIG. In particular, the flat magnet 12 is preferably disposed between the panel substrate 1 and the stage 10 over the entire surface corresponding to the size of the panel substrate to be placed.

  The opening MH of the mask MS may be any shape as long as the upper surface of the partition wall 4 is not exposed to the opening MH of the mask MS. In particular, in order to suppress clogging of the opening of the mask, a corner with a rounded corner without a corner, a hexagon with a rounded corner, or a corner with a shape that matches the shape of the cell opening with the shape of the cell opening It is preferable to round the shape, or to have an elliptical shape, a circular shape, or a racetrack shape.

The particle moving member PC can be moved on the mask (mask main body) while being in contact with the mask, and is in the form of a plate, rod, or cylinder whose longitudinal direction is a direction perpendicular to the traveling direction. Is used. The particle moving member is moved while the longitudinal direction of the particle moving member is in contact with the mask in a state perpendicular to the traveling direction, for example, but may be moved in an angular direction other than perpendicular to the traveling direction. Alternatively, it may be moved while changing the angle, and a configuration suitable for moving the dried particle group placed on the mask may be used. The number of times of movement on the mask is one or several times. At this time, it can be repeated with the moving direction of the particle moving member set to a fixed direction, or can be repeated by reciprocating the moving direction.
In addition, as a material to be disposed at the portion where the particle moving member PC is in contact with the mask, various synthetic rubber materials such as urethane rubber and silicone rubber, natural rubber materials, polyester resin, nylon resin, polyamide resin, polyurethane resin, etc. Various resin materials are used. Further, the portion of the particle moving member that comes into contact with the mask is preferably an elastic body that can be deformed when it comes into contact with the mask, and can be arranged by adjusting the elastic modulus of the elastic material, sponge-like or brushed It can be arranged by adjusting the elastic modulus by processing it upward.

In the example shown in FIG. 5B, in the present invention, when the dried particle group 3 is filled in the cell 7, the mask MS is positioned and fixedly arranged on the upper surface of the partition wall 4. Here, “while positioning” means that the mask MS is placed on the partition 4 so that the mask portion MP of the mask MS is positioned on the corresponding partition 4.
At this time, the magnetic material 11 is disposed on the surface of the mask portion MP facing the partition wall 4, and the flat magnet 12 is disposed between the panel substrate 1 and the stage 10. The material 11 is attracted by the magnetic force of the flat magnet 12 and contacts the partition wall 4. That is, since the mask MS has an integral structure with the mask portion MP on which the magnetic material 11 is disposed, the entire mask MS is attracted by the magnetic force of the flat magnet 12 disposed on the panel substrate 1. “Fixed” as used in the present application is configured so that the mask portion MP of the mask MS positioned and placed on the partition wall 4 as described above does not shift from the corresponding partition wall 4 and is in contact with the partition wall 4. It means the state to do.

Then, the dried particle group 3 placed on the mask MS fixed while positioning the mask MS is moved from one end to the other end while the particle moving member PC is in contact with the mask MS. In this way, the particle group 3 is filled into the cell 7 through the mask opening MH of the mask MS. In addition, after fixing mask MS on a partition, a particle group may be mounted on a mask and the mask on which the particle group was mounted may be fixed on a partition. When the step of arranging the particle groups in the cells on different panel substrates is sequentially performed, it is more efficient to employ a method of fixing the mask on which the particle groups are placed on the partition walls.
At this time, the mask MS is fixed on the partition 4. Therefore, even if the particle moving member PC is moved laterally while being pressed onto the mask MS, the particle group 3 placed on the mask MS is moved without repeating the bending deformation and the return deformation of the mask MS as in the prior art. be able to. As a result, the mask MS is not repeatedly deformed, and an excessive external force is not repeatedly received, so that the mask can be used for a long time. That is, the productivity can be improved by reducing the manufacturing cost.
Furthermore, even if the particle moving member PC is moved laterally from one end to the other end in contact with the mask MS, that is, an external force from one end to the other end is applied to the mask MS by the particle moving member PC. Even if added, the mask MS can be prevented from being displaced. Thereby, the particle group 3 can be surely dropped and arranged in the desired cell 7.
Furthermore, since the particle group 3 is filled in a state in which the mask MS is fixed on the partition wall 4 and the upper surface of the partition wall is reliably masked, it is possible to prevent the inconvenience of particles adhering to the partition wall 4. You can also do that.

FIG. 6 shows an example of a preferable shape of the plate-like mask MS (mask main body) employed in the manufacturing method according to the first embodiment described with reference to FIG. (A) is the top view which showed the mode of the cell opening 7HL of the several cell 7 formed of the partition 4 arrange | positioned on a panel board | substrate. (B) shows a mask MS in which an opening MH of the mask is formed corresponding to the cell opening 7HL.
Here, the mask MS is formed so that the opening MH of the mask has the same shape and the same size as the cell opening 7HL.
If such a mask MS is employed to fill the particle group, the filling can be performed in a state where the mask MS is in close contact with the partition wall 4. Therefore, it is possible to prevent the mask MS from being deformed by an excessive external force, so that it is possible to reliably remove the cause of damage to the mask and to further extend the usable period of the mask. In this case, the size of the opening MH of the mask can be maximized without exposing the upper surface of the partition wall 4 to the opening of the mask. It can be performed.

  In the first embodiment, the opening MH of the mask is formed to have the same shape and the same size as the cell opening 7HL. However, the opening MH of the mask is, for example, the same opening as the cell opening 7HL as follows. It is also possible to form the corners of the shape inside the opening so as to have roundness. FIGS. 7A to 7D are views shown for explaining other examples of the relationship between the shape of the opening of the mask and the shape of the cell formed by the partition walls in relation to the first embodiment. . In the example shown in FIG. 7A, the shape of the opening MH of the mask MS is a hexagon with rounded corners: honeycomb arrangement, and the shape of the cell 7 formed by the partition walls 4 is a hexagon: honeycomb arrangement. In the example shown in FIG. 7B, the shape of the opening MH of the mask MS is an example of a square with rounded corners: a lattice arrangement, and the shape of the cell 7 formed by the partition walls 4 is an example of a square: lattice arrangement. Show. In the example shown in FIG. 7C, the shape of the opening MH of the mask MS is a square: honeycomb arrangement with rounded corners, and the shape of the cell 7 formed by the partition walls 4 is a quadrilateral: honeycomb arrangement. In the example shown in FIG. 7D, the shape of the opening MH of the mask MS is a square with rounded corners: a lattice arrangement, and the shape of the cell 7 formed by the partition walls 4 is a stepped octagon.

(Example 2)
The second embodiment to be described next is different from the first embodiment in which the entire mask MS to be used is composed of the magnetic material 11 attracted by the magnet 12, and the magnetic material 11 is only partially included. is there. FIG. 8 is a view for explaining Example 2 of the method for manufacturing the information display panel according to the present invention.

The mask MS of FIG. 8 is fixedly disposed on the partition wall 4 as in the case of FIG. Therefore, in the case of Example 2 as well, even when the particle moving member PC is moved sideways while being pressed onto the mask MS, the mask is placed on the mask MS without repeating the bending deformation and the return deformation as in the prior art. The dried particle group 3 can be moved. As a result, the mask MS does not repeatedly deform due to excessive external force, and the mask can be used for a long time. That is, the productivity can be improved by reducing the manufacturing cost.
Furthermore, even if the particle moving member PC is moved laterally from one end to the other end in contact with the mask MS, that is, an external force from one end to the other end is applied to the mask MS by the particle moving member PC. Even if added, the mask MS can be prevented from being displaced. Thereby, the particle group 3 can be surely dropped and arranged in the desired cell 7.
Furthermore, since the particle group 3 is filled in a state where the mask MS is fixed on the partition 4, it is possible to prevent the occurrence of inconvenience that particles adhere to the partition 4.
In the case of Example 2, the entire mask MS to be used is composed of the magnetic material 11 attracted by the magnet 12. Therefore, the magnetic force attracting the mask MS by the flat magnet 12 arranged on the panel substrate 1 is increased as compared with the case of the first embodiment having only a part of the magnetic material 11. That is, the mask MS is more firmly fixed on the partition 4. Thereby, even if an external force is applied when moving the particle moving member PC, it is possible to more effectively prevent the mask MS from being displaced from a desired position. Accordingly, the particle group 3 can be more reliably dropped and arranged in the desired cell 7.

(Example 3)
In Example 3 to be described next, the magnet 12 is arranged on the surface of the mask part MP to be used on the side facing the partition wall 4 of the mask part MP. A magnetic material 11 is disposed between the panel substrate 1 facing the mask MS and the stage 10. FIG. 9 is a view for explaining Example 3 of the method for manufacturing the information display panel according to the present invention.

The mask MS of FIG. 9 is fixedly disposed on the partition wall 4 as in the case of FIG. In the case of the third embodiment, fixing onto the partition 4 is realized by the magnet 12 on the mask MS side and the magnetic material 11 between the panel substrate 1 and the stage 10 facing each other. That is, the magnetic material 11 between the panel substrate 1 and the stage 10 is attracted by the magnet 12 arranged on the mask MS side. As a result, the mask MS integrated with the magnet is attracted to the stage 10 side, and the mask MS is in close contact with the partition wall. In this way, the mask MS and the corresponding partition 4 are configured not to be displaced, and the mask MS and the partition 4 are configured to contact each other.
Therefore, in the case of Example 3 as well, even if the particle moving member PC is moved laterally while being pressed onto the mask MS, the bending and returning deformation of the mask is not repeated on the mask MS as in the prior art. The loaded particle group 3 can be moved. As a result, the mask MS is not repeatedly subjected to excessive external force, so that the mask can be used for a long time. That is, the productivity can be improved by reducing the manufacturing cost.
Furthermore, even if the particle moving member PC is moved laterally from one end to the other end in contact with the mask MS, that is, an external force from one end to the other end is applied to the mask MS by the particle moving member PC. Even if added, the mask MS can be prevented from being displaced. Thereby, the particle group 3 can be surely dropped and arranged in the desired cell 7.
Furthermore, since the particle group 3 is filled in a state where the mask MS is fixed on the partition 4, it is possible to prevent the occurrence of inconvenience that particles adhere to the partition 4.

  As can be seen from the first to third embodiments, the magnetic material attracted to the magnet may be disposed on the mask side or on the stage side on which the substrate is placed. Similarly, the magnet is disposed on the mask side. Also, it may be arranged on the stage side where the substrate is placed. That is, the mask and the stage on which the substrate is placed are attracted by the magnetic force. As a result, the partition and the mask on the substrate placed between the stage and the mask are fixed, and positioning is performed. A configuration in which the mask part MP of the mask MS placed on the partition 4 is fixed so as not to be displaced from the corresponding partition 4 is realized.

Example 4
In Example 4 to be described next, the opening MH of the mask MS used in Example 1 is made smaller than the cell opening 7HL filling the particle group 3, and the upper surface of the partition wall 4 becomes the opening MH of the mask. Further, the point of forming the opening MH of the mask MS is different from the case of the first embodiment so as not to be exposed. FIGS. 10A to 10C are views for explaining Example 4 of the method for manufacturing the information display panel according to the present invention. FIG. 10A is a diagram showing the state of the cell openings 7HL of the plurality of cells 7 formed by the partition walls 4 arranged on the panel substrate 1. (B) shows a mask MS in which an opening MH of the mask is formed corresponding to the cell opening 7HL. (C) is a view showing a state in which the dried particle group 3 is placed on the mask MS and the particle moving member PC is moved while being pressed against the mask MS to fill the cell group 7 with the particle group 3. . Although the opening MH of the mask MS shown in FIG. 10B is shown as one mask opening with respect to the corresponding one cell opening 7HL, it corresponds to one cell opening 7HL. It can also be an opening of a plurality of masks. A plurality of smaller mask openings may be fixed to one cell opening 7HL so that the upper surface of the partition wall is not exposed to the opening of the mask.

The mask MS of FIG. 10 is also fixedly arranged on the partition wall 4 as in the case of FIG. Accordingly, in the case of Example 4 as well, even when the particle moving member PC is moved sideways while being pressed onto the mask MS, the bending deformation and the return deformation are not repeated with respect to the mask as in the prior art, and the mask MS Can be moved. As a result, the mask is not repeatedly subjected to excessive external force, so that the mask can be used for a long time. That is, the productivity can be improved by reducing the manufacturing cost.
Furthermore, even if the particle moving member PC is moved laterally from one end to the other end in contact with the mask MS, that is, an external force from one end to the other end is applied to the mask MS by the particle moving member PC. Even if added, the mask MS can be prevented from being displaced. Thereby, the particle group 3 can be surely dropped and arranged in the desired cell 7.
Furthermore, since the particle group 3 is filled in a state where the mask MS is fixed on the partition 4, it is possible to prevent the occurrence of inconvenience that particles adhere to the partition 4.
In the case of the fourth embodiment, since the opening MH of the mask MS is configured to be relatively smaller than the cell opening 7HL, the width MTH of the mask portion MP that does not allow particles to pass is wider than that of the first embodiment. Become. That is, the mask portion MP serving as an arrangement interval between the openings MH of the mask MS has a wide structure, and the mask strength as a structure is improved. Thus, it becomes a highly durable structure that is not easily damaged even when repeatedly rubbed by the particle moving member PC, and the life of the mask can be further prolonged. Therefore, the replacement frequency is reduced, and productivity can be improved.

Also, compared with Example 1, the opening MH of the mask MS is smaller than the cell opening 7HL, so that when the mask MS is arranged so that the mask MP is positioned on the partition 4, the upper surface of the partition 4 is It becomes difficult to expose. Thereby, it is possible to more effectively prevent the inconvenience of particles adhering to the partition walls 4.
Further, since the magnetic material 11 or the magnet 12 arranged in the mask part MP can be arranged in a wide range, the force of the flat magnet 12 or the magnetic material 11 arranged on the stage 10 attracting the mask MS increases. That is, the mask MS is more firmly fixed on the partition 4. Thereby, even if an external force is applied when moving the particle moving member PC, it is possible to further prevent the mask MS from being displaced from a desired position. Accordingly, the particle group 3 can be more reliably dropped and arranged in the desired cell 7.

Thus, as shown in the first to third embodiments, the opening MH of the mask MS has the same shape and the same size as the cell opening 7HL, or has the same shape and rounded corners, and has almost the same size. In addition to the formation, the cell opening 7HL can be made smaller than the cell opening 7HL, or can be formed to have other accounts as in the fourth embodiment. That is, the particle group 3 is filled by arranging the mask MS so that the top of the partition wall 4 is not exposed to the opening MH of the mask MS.
In relation to this embodiment, an example of the relationship between the shape of the opening of the mask and the shape of the cell formed by the partition walls is shown in FIGS. FIGS. 11A to 11G respectively show the relationship between the mask opening shape of the mask and the cell shape formed by the partition walls. In the example shown in FIG. 11A, the shape of the opening MH of the mask MS is circular: honeycomb arrangement, and the shape of the cell 7 formed by the partition walls 4 is hexagon: honeycomb arrangement. In the example shown in FIG. 11B, the shape of the opening MH of the mask MS is an example of hexagon with rounded corners: honeycomb arrangement, and the shape of the cell 7 formed by the partition walls 4 is an example of hexagonal: honeycomb arrangement. Show. In the example shown in FIG. 11C, the shape of the opening MH of the mask MS is a rounded square: lattice-like arrangement, and the shape of the cell 7 formed by the partition walls 4 is a rounded square: grid-like arrangement. Indicates. In the example shown in FIG. 11D, the shape of the opening MH of the mask MS is circular: honeycomb arrangement, and the shape of the cell 7 formed by the partition walls 4 is circular: honeycomb arrangement. In the example shown in FIG. 11E, the shape of the opening MH of the mask MS is a square with rounded corners: a honeycomb-like arrangement, and the shape of the cell 7 formed by the partition walls 4 is a stepped octagon. In the example shown in FIG. 11F, the shape of the opening MH of the mask MS is a square with rounded corners: a honeycomb-like arrangement, and the shape of the cell 7 of the partition wall 4 is a stepped octagon. In the example shown in FIG. 11 (g), the shape of the opening MH of the mask MS is circular: a lattice arrangement, and the shape of the cell 7 of the partition 4 is a stepped octagon.

(Example 5)
In Example 5 to be described next, the groove 13 having a width slightly larger than the width 4TH of the partition wall 4 is formed in the mask portion MP of the mask MS. Then, the mask MS is fixed on the partition wall 4 by fitting the partition wall 4 into the groove 13. 12 (a) to 12 (c) are views for explaining Example 5 of the method for manufacturing the information display panel according to the present invention. FIG. 12A is a diagram showing the state of the cell openings 7HL of the plurality of cells 7 formed by the partition walls 4 arranged on the panel substrate 1. FIG. 12B is a bottom view of the mask MS in which the mask opening MH is formed so as to correspond to the cell opening 7HL (surface on the side of the partition 4 when assembled). From this figure, it can be seen that the groove 13 having a width slightly larger than the width 4TH of the partition wall 4 is provided in the mask portion MP. (C) is a view showing a state in which the dried particle group 3 is placed on the mask MS and the particle moving member PC is moved while being pressed against the mask MS to fill the cell group 7 with the particle group 3. .

Thus, since the mask MS is placed on the partition wall 4 so that a part of the partition wall 4 is fitted in the groove 13, the mask MS of FIG. 12 is also on the partition wall 4 as in FIG. Fixedly arranged. Here, the space between the openings of the mask, in other words, the width of the mask portion is made larger than the width of the partition formed on the panel substrate. Therefore, the mask has an opening smaller than the opening of the cell surrounded by the partition of the panel substrate. The width of the groove 13 is slightly larger than the width 4TH of the partition wall 4 so that the partition wall 4 can be fitted in the groove, and the bottom of the groove 13 is the same as the shape of the partition wall 4 to be fitted. Is preferred. Therefore, for example, when the front end portion of the partition wall 4 to be fitted is flat, the bottom surface of the groove 13 is also flat. The depth of the groove 13 can be adjusted by the height of the partition wall 4. However, in order to prevent the mask MS from shifting from above the partition wall 4 even when an external force is applied, the depth is set to 5 μm to 10 μm. Is preferred.
Therefore, in the case of Example 5 as well, even if the particle moving member PC is moved laterally while being pressed onto the mask MS, the bending deformation and the return deformation are not repeated with respect to the mask as in the prior art, and the mask MS Can be moved. As a result, the mask is not repeatedly subjected to excessive external force, so that the mask can be used for a long time. That is, the productivity can be improved by reducing the manufacturing cost.
Furthermore, even if the particle moving member PC is moved laterally from one end to the other end in contact with the mask MS, that is, an external force from one end to the other end is applied to the mask MS by the particle moving member PC. Even if added, the mask MS can be prevented from being displaced. Thereby, the particle group 3 can be surely dropped and arranged in the desired cell 7.
Furthermore, since the particle group 3 is filled in a state where the mask MS is fixed on the partition 4, it is possible to prevent the occurrence of inconvenience that particles adhere to the partition 4.

In the case of the fifth embodiment, a part of the partition wall 4 which becomes the mask side when assembled is fitted in the groove 13 of the mask MS. Therefore, the mask MS can be more firmly fixed on the partition 4 as compared with the first embodiment in which the mask MS and the partition 4 are fixed only by the magnetic force attracted by the magnetic material and the magnet. Thereby, even if an external force is applied when moving the particle moving member PC, it is possible to further prevent the mask MS from being displaced from a desired position. Accordingly, the particle group 3 can be more reliably dropped and arranged in the desired cell 7.
Further, the groove 13 needs to have a width slightly larger than the width of the partition wall 4 so that the partition wall 4 can be inserted. Accordingly, the width MTH of the mask part MP that does not allow the passage of particles in order to form the groove 13 is wider than the width of the partition wall 4. That is, the mask portion MP serving as an arrangement interval between the openings MH of the mask MS has a wide structure, and the mask strength as a structure is improved. Thus, it becomes a highly durable structure that is not easily damaged even when repeatedly rubbed by the particle moving member PC, and the life of the mask can be further prolonged. As a result, the replacement frequency is reduced, and productivity can be improved.

(Example 6)
The sixth embodiment described below is different from the fifth embodiment in that a part or the whole of the mask MS is made of a magnetic material attracted to the magnet.
That is, at least a part of the mask MS is provided with the magnetic material 11 that is attracted by the magnet 12 as in the first embodiment, and corresponds to the size of the panel substrate to be placed between the panel substrate 1 and the stage 10. The magnets 12 are arranged evenly over the entire surface. Here, at least a part means a portion facing the upper surface of the partition when the mask MS is placed on the partition 4, that is, the groove 13 (when the mask MS is in the state shown in FIG. 12B). It says the bottom part of.
Further, as in the second embodiment, the entire mask MS is configured by the magnetic material 11 attracted by the magnet 12, and corresponds to the size of the panel substrate to be placed between the panel substrate 1 and the stage 10. The magnets 12 may be arranged evenly over the entire surface.
In any case where a part or the whole of the mask MS is made of the magnetic material 11, in particular, the plate-like magnet is placed on the panel substrate 1 and the stage over the entire surface corresponding to the size of the panel substrate to be placed. 10 is preferable.

According to said structure, compared with the case of Example 5 which only fits a partition to a groove | channel, a mask will be fixed more firmly with respect to a partition. Thereby, the particle group 3 can be surely dropped and arranged in the desired cell 7.
Furthermore, since the particle group 3 is filled in a state in which the mask MS is more firmly fixed on the partition wall 4, it is possible to prevent the occurrence of inconvenience that particles adhere to the partition wall 4.

  Then, after placing the mask on the partition wall and filling the particle group while positioning as described above, an adhesive is placed on at least a part of the upper surface of the partition wall, and the substrate is placed on the two substrates. to paste together.

  Furthermore, the material of each member which comprises the information display panel used as the object of the manufacturing method of this invention is demonstrated below.

  First, the particle group used as the display medium has an average particle diameter d (0.5) in the range of 1 μm to 20 μm, and can be composed of one type of particle or a combination of a plurality of types of particles. If the average particle diameter d (0.5) is larger than this range, the display is not clear. If the average particle diameter d (0.5) is smaller than this range, the cohesive force between the particles becomes too large, which hinders movement as a display medium. Become.

Furthermore, regarding the particle size distribution, the particle size distribution Span shown by the following formula is less than 5, preferably less than 3.
Span = (d (0.9) −d (0.1)) / d (0.5)
(However, d (0.5) is a numerical value indicating the particle diameter in μm that 50% of the particles are larger than this and 50% is smaller than this, and d (0.1) is a particle in which the ratio of the smaller particles is 10%. (Numerical value expressed in μm, and d (0.9) is a numerical value expressed in μm for a particle diameter of 90% or less.)
By keeping Span within a range of 5 or less, the size of the chargeable particles is uniform, and movement as a uniform display medium becomes possible.

  Furthermore, when using a plurality of display media, among the chargeable particles constituting the display medium used, the average particle diameter d (0.5) is the maximum for the average particle diameter d (0.5) of the chargeable particles. The ratio of the average particle diameter d (0.5) of the chargeable particles having the minimum average particle diameter d (0.5) is 10 or less. Even if the particle size distribution Span is reduced, a plurality of particle groups move in the opposite directions as the display medium, so that the particle size constituting each other particle group can be easily moved as the display medium. This is preferable, and this is the range.

The particle size distribution and the particle size can be obtained from a laser diffraction / scattering method or the like. When laser light is irradiated onto particles to be measured, a light intensity distribution pattern of diffracted / scattered light is spatially generated, and this light intensity pattern has a corresponding relationship with the particle diameter, so that the particle diameter and particle diameter distribution can be measured. .
Here, the particle size and the particle size distribution are obtained from the volume-based distribution. Specifically, using a Mastersizer2000 (Malvern Instruments Ltd.) measuring instrument, put particles into a nitrogen stream and use the attached analysis software (software based on volume-based distribution using Mie theory). The diameter and particle size distribution can be measured.

Furthermore, when the particle group is used as a display medium and driven in a gas space, it is important to manage the gas in the void surrounding the display medium between the panel substrates, which contributes to improved display stability. Specifically, it is important that the relative humidity at 25 ° C. is 60% RH or less, and preferably 50% RH or less for the humidity of the gas in the gap.
1A, 1B, 2A and 2B, the gaps are defined as electrodes 5 and 6 (electrodes inside the substrate). In this case, the gas portion in contact with the so-called display medium excluding the occupied portion of the display medium 3, the occupied portion of the partition wall 4, and the seal portion of the panel is meant.
The gas in the gap is not limited as long as it is in the humidity region described above, but dry air, dry nitrogen, dry argon, dry helium, dry carbon dioxide, dry methane, and the like are preferable. This gas must be sealed in the panel so that the humidity is maintained. For example, the display medium is filled and the panel is assembled in a predetermined humidity environment. It is important to apply a sealing material and a sealing method to prevent it.

The distance between the substrates in the information display panel of the present invention is not limited as long as the display medium can be driven and the contrast can be maintained, but is usually adjusted to 2 μm to 500 μm, preferably 5 μm to 200 μm.
When the information display panel is a space movement method in charged particle gas, the distance between the substrates is adjusted in the range of 10 μm to 100 μm, preferably 10 μm to 50 μm. Further, the volume occupation ratio of the display medium in the gas space between the substrates is preferably 5% to 70%, more preferably 5% to 60%. When it exceeds 70%, the movement of particles as a display medium is hindered, and when it is less than 5%, the contrast tends to be unclear.

The partition formed on the panel substrate has a function of ensuring a constant distance (gap between substrates) formed by two panel substrates facing each other and a function of partitioning the space between the substrates into cells. Although the partition walls can be formed to have a constant width, it is preferable to increase the width of some of the partition walls to secure the inter-substrate gap because the strength of the panel structure increases.
A preferable width of the partition wall is 5 μm to 100 μm in the partition wall portion for securing the gap between the substrates, and 2 μm to 50 μm in the partition wall portion for cell formation. Since the partition wall portion is a non-display portion where no display medium exists in the information display screen area, the partition wall width is preferably as small as possible. It is preferable to increase the width of some partition walls to maintain the strength of the panel structure, while reducing the width of other partition portions as much as possible, and to reduce the non-display portion in the entire display screen area. .
A dry film resist is suitably used as the partition wall forming material. As an example, Alfo NIT2 (manufactured by Nichigo Morton) or PDF300 (manufactured by Nippon Steel Chemical Co., Ltd.) can be used.

  The arrangement of the partition walls for partitioning the inter-substrate space into cells can be a lattice shape, a honeycomb shape, a mesh shape, or the like. The cross-sectional shape of the cell may be any polygon such as a quadrangle, triangle, hexagon, or staircase octagon, a circle, an ellipse, or a racetrack, or a combination of a plurality of shapes. From the viewpoint that the display portion of the display screen area can be enlarged, a quadrangle, a staircase octagon or a hexagon is preferable. From the viewpoint that particles constituting the display medium can be easily moved, a shape having a curve is preferable. From the two points, a square with rounded corners, a hexagon with rounded corners, and a stepped octagon with rounded corners are preferably used.

  The height of the partition wall to match the gap between the substrates is appropriately designed depending on the display medium used in the information display panel. When particles having an average particle diameter of 1 μm to 20 μm are used as the display medium, 10 μm to 500 μm are preferable, and 10 μm More preferably, it is 100 μm. In the information display panel of the charged particle movement type as shown in FIGS. 1, 2, and 3 using the chargeable particles having an average particle diameter of 1 μm to 20 μm as the display medium, the height of the partition wall is set to 10 μm to 50 μm. Is preferred. This is because when the charged particles as the display medium are electrically driven by the electric field generated by the voltage applied to the counter electrode, a larger electric field can be obtained at a lower voltage by reducing the distance between the counter electrodes. This is because the display medium can be easily driven.

  When the conductive film is provided on the panel substrate, it is necessary to provide a transparent conductive film in the information display screen area of the observation side panel substrate. Indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), Examples thereof include transparent conductive metal oxides such as aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide, and conductive zinc oxide, and transparent conductive polymers such as polyaniline, polypyrrole, and polythiophene. .

  As the conductive film provided outside the information display screen area or on the back side panel substrate, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO) , Conductive metal oxides such as conductive tin oxide and conductive zinc oxide, conductive polymers such as polyaniline, polypyrrole and polythiophene, metals such as gold, silver, copper, aluminum, nickel and chromium, and these An alloy containing a metal as a main component may be mentioned, and these may be transparent or not transparent.

As a method for forming a conductive film, a method of forming the above-described materials into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, or a method of laminating metal foil (for example, rolled copper foil) A method of mixing a conductive agent with a solvent or a synthetic resin binder and applying the conductive agent is used. The above-mentioned material that can be patterned and is electrically conductive can also be suitably used. In addition,
The thickness of the conductive film provided in the information display screen region of the observation side panel substrate is preferably 0.01 μm to 10 μm, more preferably 0.05 μm to 5 μm, as long as the conductivity can be ensured and the light transmission is not hindered. Further, the thickness of the conductive film provided outside the information display screen region and on the back panel substrate is sufficient as long as conductivity can be secured, preferably 0.01 μm to 10 μm, and more preferably 0.05 μm to 5 μm.

  A metal oxide-based transparent conductive material such as ITO, which is suitable as an electrode formed on the observation side panel substrate, is less flexible than a metal material, and thus is easily broken and disconnected. Therefore, it is preferable to use in combination with a highly flexible metal wire. In particular, when a line-shaped electrode is used, it is preferable to use it in combination with a thin metal wire because the disconnection in the transparent electrode material is prevented. The width of the fine metal wire is preferably 1 μm to 10 μm because display visibility is not hindered. Since there is no need to consider light transmission outside the information display screen area or on the back side panel substrate, the metal material having low electrical resistance and excellent flexibility is preferably used. In addition, the thickness of the conductive film provided outside the information display screen region and on the rear panel substrate is designed to be 0.01 μm to 10 μm from the viewpoint of electrical resistance, productivity, and cost.

  Information display panels subject to the manufacturing method of the present invention include notebook computers, electronic notebooks, portable information devices called PDA (Personal Digital Assistants), display units of mobile devices such as mobile phones and handy terminals, electronic books, Electronic paper such as electronic newspapers, signboards, posters, bulletin boards such as blackboards (whiteboards), display units for electronic desk calculators, home appliances, automobile supplies, card display units such as point cards and IC cards, electronic advertisements, information boards In addition to electronic POP (Point Of Presence, Point Of Purchase advertising), electronic price tags, electronic shelf labels, electronic musical scores, RF-ID device display units, POS terminals, car navigation devices, display units of various electronic devices such as watches In addition to being used suitably, information display panel (rewritable paper) or external electric field type that is connected to external rewriting means to rewrite display Also suitably used as an information display panel for display rewriting using means (rewritable paper).

  The display medium used for the information display panel that is the target of the production method of the present invention is electrically conductive, such as a particle group containing charged particles, a particle group containing conductive particles, or a particle group containing semiconductive particles. It is a particle group including particles that can be driven. As for the driving method of the information display panel which is the object of the manufacturing method of the present invention, a simple matrix driving method and a static driving method which do not use a switching element in the panel itself, and a three-terminal switching element represented by a thin film transistor (TFT) Alternatively, various types of driving methods such as an active matrix driving method using a two-terminal switching element typified by a thin film diode (TFD) and a driving method using an external electric field forming means can be applied.

DESCRIPTION OF SYMBOLS 1, 2 Panel substrate 3 Particle group used as display medium 3W White display medium 3B Black display medium 4 Partition 4TH Width of partition 5, 6 Electrode 7 Cell 7HL Cell opening 10 Stage 11 Magnetic material 12 Magnet 13 Groove MS Mask MB Mask body MH Mask opening MP Mask part MF Frame MT Tension applying member MTH Width of mask part

Claims (11)

A display medium configured as an electrically drivable particle group is disposed in a cell surrounded by a partition wall between two substrates having at least two transparent substrates facing each other, and the display medium is electrically A method for manufacturing an information display panel that displays information by driving the device,
When the particle group is filled in the cell on the substrate, a mask having a mask opening corresponding to the cell opening is formed on the partition, and the cell opening and the mask opening are A mask mounting step for fixing and mounting while positioning so as to correspond;
A particle group filling step of placing the particle group on the mask, moving the particle moving member while pressing the particle moving member against the mask, and filling the particle group into a cell on a panel substrate from the opening of the mask;
And a substrate bonding step of bonding the two substrates together with an adhesive disposed on at least a part of the upper surface of the partition wall. A magnetic material that is attracted by a magnet to a portion of the mask that faces at least the partition and is located on the partition when the mask is placed on the partition;
Between the panel substrate and a stage on which the panel substrate is placed, the magnets are arranged evenly over the entire surface corresponding to the size of the panel substrate to be placed,
The method for manufacturing an information display panel according to claim 1, wherein the mask is fixed onto the partition wall by the magnetic material and the magnet.   The method for manufacturing an information display panel according to claim 2, wherein the mask is made of a magnetic material attracted by a magnet. A magnet is disposed on a portion of the mask that is at least on the surface facing the partition and located on the partition when the mask is placed on the partition;
Between the panel substrate and the stage on which the panel substrate is mounted, a magnetic material that is attracted by the magnet is arranged evenly over the entire surface corresponding to the size of the panel substrate to be mounted,
2. The method for manufacturing an information display panel according to claim 1, wherein a mask is fixed onto the partition wall by the magnet and the magnetic material. Forming a groove on the surface of the mask facing the partition and at a position corresponding to the partition;
The method for manufacturing an information display panel according to claim 1, wherein the mask is fixed on the partition by fitting the partition into the groove. In the groove, a magnetic material attracted by a magnet is disposed, and the partition is fitted in the groove,
Between the panel substrate and the stage on which the panel substrate is placed, the magnet is arranged evenly over the entire surface corresponding to the size of the panel substrate to be placed,
6. The method for manufacturing an information display panel according to claim 5, wherein the mask is fixed onto the partition wall by the magnet and the magnetic material.   The method for manufacturing an information display panel according to claim 6, wherein the mask is made of a magnetic material attracted by a magnet.   The information display panel according to claim 1, wherein the opening of the mask is formed in the same size and the same size as the opening of the cell on the substrate. Production method.   9. The method for manufacturing an information display panel according to claim 8, wherein the opening of the mask is formed smaller than the opening of the cell on the substrate.   The opening of the mask is formed in the same shape as the opening of the cell on the substrate and has a rounded corner, or a circular shape, an elliptical shape, or a racetrack shape, and is smaller than the opening of the cell. The method for manufacturing an information display panel according to claim 9.   An information display panel manufactured by the method for manufacturing an information display panel according to claim 1.

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