JPH04199124A - Production of liquid crystal display element - Google Patents

Abstract

PURPOSE:To improve the production yield of the liquid crystal display element by dividedly printing plural dummy insulating films along the other peripheral edges of substrates and printing the dummy sealing material to be printed on another substrate so as to evade the dummy insulating films. CONSTITUTION:Oriented films 13, 23 are dummy oriented films 13a, 23a are respectively printed in the respective element regions and outer peripheral edges of a pair of the substrate 11, 21 and thereafter, the frame-shaped sealing materials 30 enclosing the outer peripheries of the oriented films 13 of the respective element regions and the dummy sealing materials 30a along the outer peripheral edges of the substrate are printed on the surface of the one substrate 11 of the substrates 11, 12. The sealing materials 30a are so printed as to evade the oriented films 13a printed on the outer peripheral edges of the substrate. The sealing materials 30a are printed to nearly the same patterns as the patterns of a part of the shape of the frame-shaped sealing materials 30 and at the same pitch as the arranging pitch of the frame-shaped sealing materials 30a. The one substrate 11 and the other substrate 21 are then superposed on each other and are pressurized to adhere both substrates 11, 21 via the frame-shaped sealing materials 30 of the respective element regions. Plural pieces of the frame-shaped display elements are simultaneously assembled in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a thin liquid crystal display element.

[Conventional technology]

Liquid crystal display elements are generally manufactured by a manufacturing method called a multi-manufacturing method. This multi-manufacturing method involves forming display electrodes and insulating films such as alignment films on each element area of a pair of substrates that have an area that can accommodate multiple liquid crystal display elements. This is a method of simultaneously assembling a plurality of liquid crystal display elements by adhering them via a frame-shaped sealing material that surrounds each of the insulating films. The liquid crystal display element is separated into individual liquid crystal display elements by dividing the liquid crystal into individual liquid crystal display elements, and then liquid crystal is injected through a liquid crystal injection port previously provided to fit a part of the sealing material, and this liquid crystal injection port is sealed. It has been completed. According to this multi-manufacturing method, a plurality of liquid crystal display elements can be manufactured simultaneously.

When manufacturing liquid crystal display elements using this multi-manufacturing method,
Conventionally, a display electrode is formed in each element region of the pair of substrates, and after printing an insulating film such as an alignment film on each element region of both substrates by letterpress printing, each Printing a frame-shaped sealing material surrounding the outer periphery of the insulating film printed in each element region and a dummy sealing material along the substrate outer periphery to the same thickness on the element region and the outer periphery of the substrate, Thereafter, the two substrates are placed on top of each other, and pressure is applied to the two substrates so that the gap between them becomes a predetermined value, and in this state, the frame-shaped sealing material and the dummy sealing material are cured to bond the two substrates together. .

5 and 6 show a substrate on which a frame-shaped sealing material and a dummy sealing material are printed, in which 1 is a transparent substrate made of glass or the like, and 2 is a transparent substrate formed on each element area on one side of this substrate. This electrode 2 is formed by forming a transparent conductive film made of ITO or the like on one surface of a substrate and patterning this transparent conductive film. Reference numeral 3 denotes a transparent insulating film printed on each element region on one surface of this substrate. This insulating film 3 is, for example, an alignment film made of an organic polymer material such as polyimide, and this insulating film 3 is formed in relief on the outer peripheral surface of the elastic roller body in correspondence with each element region of the substrate 1. It is printed by letterpress printing using a printing roller (not shown). Reference numeral 4 denotes a frame-shaped sealing material made of a resin adhesive such as epoxy resin, which is printed on each element area of the substrate 1 to surround the outer periphery of the insulating film 3, and 4a is printed on the outer periphery of the substrate 1. This is a printed dummy sealing material made of the same resin adhesive as the frame-shaped sealing material 4, and the frame-shaped sealing material 4 and the dummy sealing material 4a are printed to the same thickness by screen printing. Note that the frame-shaped sealing material 4 is printed in a pattern having a cutaway part that becomes the liquid crystal injection port 5 on a part thereof, and the dummy sealing material 4a is printed in a pattern that is almost the same as the shape of a part of the frame-shaped sealing material 4. has been done.

The dummy sealing material 4a is printed on the outer peripheral edge of the substrate 1 in this way, and the dummy seal material 4a is printed on the outer peripheral edge of the substrate 1. This is to make the gap between the substrates uniform for all the liquid crystal display elements assembled by forming a substrate (on which an insulating film such as an alignment film is printed by letterpress printing method) on each element region.

That is, the liquid crystal display element is manufactured by overlapping the substrate 1 and another substrate, pressing the two substrates so that the gap between them becomes a predetermined value, and in this state, applying the frame-shaped sealing material 4.
It can be assembled by curing and gluing both substrates together.
In this case, when the two substrates are overlapped and pressurized, a load due to the pressure of the substrate is applied to the frame-shaped sealing material 4 in each element region, and each side of each frame-shaped sealing material 4 is crushed by In this case, the load applied to each side of the frame-shaped sealing material 4 of all the element areas excluding the element area on the outer periphery of the element area group arranged vertically and horizontally is applied to this side and the adjacent side. Since it acts in a distributed manner on the sides of other frame-shaped sealing materials 4, the amount of soaking on each side of these frame-shaped sealing materials 4 is uniform. However, in the frame-shaped sealing material 4 on the outer periphery, the load applied to the sides a, b on the center side of the board among the sides a, b, c, and d is the same as the load applied to the other frame-shaped sealing material 4 adjacent thereto. However, since the load is concentrated and acts only on the sides c and d on the outer peripheral side of the board, the load acts on the outer peripheral sides c and d. is crushed more than the central sides a and b. Therefore, the gap between the two substrates in this portion becomes smaller, and as a result, the gap between the substrates of the liquid crystal display element constituted by the element region at the outer periphery becomes non-uniform.

On the other hand, as described above, the dummy sealing material 4a is also applied to the outer peripheral edge of the substrate 1 to the same thickness as the frame-shaped sealing material 4 of each element region.
If you print the frame-shaped sealing material 4 of the element area on the outer periphery,
Since the load applied to the outer peripheral sides c and d of the frame-shaped sealing material 4 acts in a distributed manner on these sides c and d and the dummy sealing material 4a, the respective sides a, b, c, and d of the frame-shaped sealing material 4 may collapse. Since the amounts are equal, the gap between the side substrates can be made uniform over the entire substrate area, and the gap between the substrates of all the assembled liquid crystal display elements can be made uniform.

[Problem to be solved by the invention]

However, in the conventional manufacturing method described above, the thickness of the insulating film 2 formed on the transparent substrate 1 becomes non-uniform, and even if the gaps between the substrates of all the assembled liquid crystal display elements are uniform, the liquid crystal There has been a problem in that the actual cell gap of the display element is not necessarily uniform.

That is, as described above, the insulating film 3 formed on the transparent substrate 1 is formed on the outer peripheral surface of the elastic roller body.
Printing is carried out using a letterpress printing method that uses a printing roller that has a letterpress formed corresponding to each element area, and the printing roller contacts one surface of the substrate with a liquid insulating material adhered to each letterpress surface. The insulating film 3 is printed on the substrate 1 by transferring the insulating material on each letterpress surface onto the substrate 1 while rotating on the substrate 1. The thickness of the insulating film 3 printed on the first surface of the substrate is determined by the contact pressure of the relief plate against the first surface of the substrate. The thickness of the insulating film 3 printed on the area also becomes uniform.

However, since the printing roller is pressed against the bearings at both ends and comes into contact with the surface of the substrate, each letterpress in the center of the roller (letterplates lined up in the axial direction of the roller) has uniform contact pressure over its entire area. The letterpress on both ends of the roller makes contact with the substrate 1 surface more strongly on the roller end side, so the printing film thickness on this side becomes thinner, resulting in printing on the outer peripheral element area. The resulting insulating film 3 becomes a film with non-uniform thickness as shown in FIG.

When the thickness of the insulating film 3 becomes uneven in this way,
The electro-optical characteristics partially change due to the difference in the electrical transmittance between the opposing electrodes, and even if the thickness of each side of the frame-shaped sealing material 4 is equal, the cell gap of the liquid crystal display element becomes uneven.

For this reason, in conventional manufacturing methods, "display unevenness" occurs in the liquid crystal display element consisting of the outer peripheral element area due to non-uniformity in the thickness of the insulating film and the cell gap, resulting in the liquid crystal display element being defective. Therefore, the manufacturing yield of liquid crystal display elements decreases.

It is an object of the present invention to ensure that all liquid crystal display elements assembled at the same time have a cell gap in which the thickness of the insulating film printed by letterpress printing on the side substrate surface is uniform and the thickness of each side of the frame-shaped sealing material is also equal. An object of the present invention is to provide a method for manufacturing a liquid crystal display element, which can produce a uniform element.

[Means for Solving the Problems] In the present invention, a display electrode is formed in each element region of a pair of substrates having an area capable of collecting a plurality of liquid crystal display elements, and a display electrode is formed in each element region of this side substrate. After each insulating film is printed by letterpress printing, a frame-shaped sealing material and a substrate are applied to each element area and the outer peripheral edge of the substrate on the - side of the substrate, respectively, surrounding the outer periphery of the insulating film printed on each element area. A liquid crystal display in which a plurality of liquid crystal display elements are simultaneously assembled by printing a dummy sealing material along the outer peripheral edge to the same thickness, and then bonding the side substrate through the frame-shaped sealing material and the dummy sealing material. In the device manufacturing method, when printing the insulating film by letterpress printing, a dummy insulating film made of the same insulating material as the insulating film is also placed on the outer peripheral edge of the substrate, and a printing plate for printing the insulating film and a dummy insulating film printing at the same time using a printing roller formed with a printing relief plate, and printing the dummy insulating film divided into a plurality of parts along the outer periphery of the substrate, and printing the dummy sealing material on the one substrate, The present invention is characterized in that printing is performed while avoiding the dummy insulating film.

[Effect]

In this way, when printing an insulating film on each element region on the substrate surface, the printing roller on which the insulating film printing relief plate and the dummy insulating film printing relief plate are formed is used to print the insulating film also on the outer peripheral edge of the substrate. If you print a dummy insulating film made of the same insulating material as the insulating film, both ends of the printing roller will come into contact with the substrate surface via the dummy insulating film printing letterpress, so the roller ends of the insulating film printing letterpress on both ends of the roller will The letterpress for printing the dummy insulating film can prevent the part side from strongly contacting the substrate surface. Therefore, all the letterpress plates for printing the insulating film of the printing roller can be brought into contact with the substrate surface with uniform contact pressure over the entire area. Therefore, it is possible to print an insulating film with a uniform thickness on all device regions. Further, in the present invention, the dummy insulating film is divided into a plurality of parts and printed along the outer periphery of the substrate, and when printing the frame-shaped sealing material on each element area on one substrate surface, the dummy insulating film is printed on the outer periphery of this substrate surface. Since the dummy seal material to be printed is printed avoiding the dummy insulating film, this dummy seal material does not overlap the dummy insulating film, and therefore,
Since the level of the top surface of the printed dummy seal material is the same as the top surface level of the frame-shaped seal material, when a pair of substrates are overlapped and pressurized, the elements are By making the amount of collapse of each side of the frame-shaped sealing material in the region uniform, the gap between the side substrates can be made uniform over the entire substrate area, and the gap between the substrates of all the assembled liquid crystal display elements can be made uniform.

〔Example〕

The first embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
This will be explained with reference to the figures. FIG. 1 is a manufacturing process diagram of a liquid crystal display element, and FIG. 2 is a plan view of a substrate on which an insulating film and a sealing material are printed.

In FIGS. 1 and 2, reference numerals 1, 1 and 21 indicate a pair of transparent substrates made of glass or the like. Both boards 11.21
Each of the substrates is a large substrate having an area large enough to accommodate a plurality of liquid crystal display elements, and transparent electrodes 12 and 22 for display are formed in each element area. The electrodes 12.degree. 22 are formed by forming a transparent conductive film made of ITO or the like on the substrate 11.21 and patterning this transparent conductive film. Further, transparent insulating films 13.23 are printed on each element area of both substrates 11.21, and the same insulating material as the insulating films 13.23 is also printed on the outer periphery of both substrates 11.21. A dummy insulating film 13 consisting of
a, 23a are printed. In addition, in this example,
The above insulating film 13.23 and dummy insulating films 1.3a, 2
3a is an insulating film for alignment film made of polyimide or the like. Hereinafter, the insulating films 13 and 23 will be referred to as alignment films, and the dummy insulating films 13a and 23a will be referred to as dummy alignment films.

These alignment films 1B and 23 and the dummy alignment film 13a.

23a was printed at the same time by letterpress printing method,
In this manufacturing method, the alignment films 13 and 23 and the dummy alignment film 1 are
3a and 23a are printed in the following manner.

FIG. 1(a) shows a method of printing an alignment film 13 and a dummy alignment film 13a on one surface of a substrate 11, and 40 in the figure is a printing row. This printing roller 40 has alignment film printing relief plates 42 formed on the outer circumferential surface of an elastic roller body (for example, a rubber roller) 41 in correspondence with each element area of the substrate 11. A dummy alignment film printing relief plate 42a having the same protrusion height as the alignment film printing relief plate 42 is formed on the outer periphery, and this dummy alignment film printing relief plate 42a is divided into a plurality of parts in the circumferential direction of the roller body 41. It is formed by In this example, the shape of the dummy alignment film printing relief plate 42g is the same as that of one end of the alignment film printing relief plate 42, and the dummy alignment film printing relief plate 42a is arranged at the arrangement pitch of the alignment film printing relief plate 42 ( The rollers are formed at the same pitch as the arrangement pitch in the circumferential direction of the rollers.

Then, an alignment film 13 and a dummy alignment film 13 are applied to the surface of the substrate 11.
The printing of a is carried out by each relief plate 42.42a of the printing roller 40.
A liquid alignment material is applied to the surface, and the printing roller 40 is brought into contact with the surface of the substrate 11 and rotated over the substrate 11.

In this case, the printing roller 30 is pressed against the bearings (not shown) at both ends and comes into contact with the surface of the substrate. Each letterpress plate for printing an alignment film (letterplates arranged in the axial direction of the roller) 32 in the center contacts the surface of the substrate 11 with uniform contact pressure over the entire area, whereas letterpress plates 32 for printing a alignment film at both ends of the roller contact the surface of the substrate 11 with uniform contact pressure over the entire area. Although the roller end side strongly contacts the surface of the substrate 11, as described above, the printing roller 30 on which the relief plate 32 for alignment printing and the letterpress plate 32a for printing the dummy alignment film are formed is used to print the surface of the substrate 11. If a dummy alignment film 13a made of the same alignment material as the alignment film 13 is printed on the outer peripheral edge, both ends of the printing hole 30 will come into contact with the surface of the substrate 11 via the dummy alignment film printing relief plate 32a. The dummy alignment film printing relief plate 32 makes sure that the roller end sides of the alignment film printing relief plate 32 on both ends of the roller strongly contact the surface of the substrate 11.
can be prevented by a, therefore the printing roller 3
By bringing all of the alignment film printing relief plates 32 of 0 into contact with the surface of the substrate 11 with uniform contact pressure over the entire area, it is possible to print the alignment film 13 to have a uniform thickness in all element regions. In this case, the dummy alignment film printing relief plate 32a at both ends of the roller has its roller end side strongly pressed against the substrate 1.
Since the dummy alignment film 13a is printed by this dummy alignment film printing relief plate 32a, it is an alignment film that is not used for liquid crystal display elements. Even if the film thickness becomes non-uniform, there is no problem.

Although the printing of the alignment film 13 on one substrate 11 has been described here, the alignment film 23 and the dummy alignment film 23a are printed in the same pattern on the other substrate 21 in the same manner as described above. In addition, an alignment film 13 is provided on the substrate 11 and 21 surfaces.
, 2B and the dummy alignment films 13a, 23a are dried or baked, and then the alignment films 13, 2B are printed.
The surface of No. 3 is subjected to orientation treatment by rubbing or the like.

In this way, the alignment films 13 and 23 and the dummy alignment film 1 are formed on each element region and the outer peripheral edge of the pair of substrates 11 and 21, respectively.
After printing 3a and 23a, this pair of substrates 11.2
A frame-shaped sealing material 30 surrounding the outer periphery of the alignment film 13 in each element region and a dummy sealing material 30a along the outer periphery of the substrate are placed on one surface of the substrate 11 in FIG. Print as shown in FIG. In addition, in Figure 2,
3] is a liquid crystal injection port formed by cutting off a part of the frame-shaped sealing material 30. The frame-shaped sealing material 30 and the dummy sealing material 30a are printed to the same thickness by screen printing using a resin adhesive such as epoxy resin.

In this case, the dummy seal material 30a is as shown in FIG. 1(a).
In the process, printing is performed while avoiding the dummy alignment film 13a printed on the outer peripheral edge of the substrate. In this embodiment, the dummy sealing material 30a is formed in a pattern that is almost the same as the shape of a part of the frame-shaped sealing material 30 (outside of the dummy alignment films 13a, 23a printed on the outer peripheral edge of the side substrate 1.1.21). (a pattern surrounding the frame-shaped sealing material 30) and at the same pitch as the arrangement pitch of the frame-shaped sealing material 30.

After this, the above-mentioned one substrate 11 and the other substrate 21 forming a pair therewith are overlapped and pressurized as shown in FIG. A plurality of liquid crystal display elements are assembled at the same time by bonding via the frame-shaped sealing material 30 in the area.

In this case, in this manufacturing method, the dummy alignment film 13a is printed on the outer peripheral edge of the side substrate 11°21.

23a is divided into a plurality of parts and printed along the outer periphery of the substrate, and a dummy sealing material 30a is printed on the outer periphery of this substrate 11 when printing the frame-shaped sealing material 30 on each element area on one substrate 11. is printed avoiding the dummy alignment films 13a and 23a, so this dummy sealing material 30a is the dummy alignment film 13a.

23a, and therefore the upper surface of the printed dummy sealing material 30a is at the level of the frame-shaped sealing material 30a.
Since it is the same as the top surface level of -pair board 11.21
When overlapping and applying pressure, the amount of collapse on each side of the frame-shaped sealing material 30 of the element area is made uniform on the outer periphery of the element area group arranged vertically and horizontally, and the gap between the side substrates 11 and 21 is made uniform. can be made uniform over the entire substrate area, and the inter-substrate gaps of all assembled liquid crystal display elements can be made uniform.

After this, each liquid crystal display element is separated into individual elements by dividing the side substrate 11.21 at the dividing position shown by the chain line in FIG. 1(C). Liquid crystal is injected through the injection port 31, and the liquid crystal injection port 31 is sealed to complete the liquid crystal display element.

That is, in the above manufacturing method, when printing the alignment films 13, 23 on the side substrate 11.21 surface by letterpress printing, a dummy alignment film 13a made of the same alignment material as the alignment film 13.23 is also formed on the outer peripheral edge of the substrate. , 23a are simultaneously printed using a printing roller 40 formed with a printing relief plate 42 for the alignment films 13, 23 and a printing relief plate 42a for the dummy alignment films 13a, 23a, and the dummy alignment films are printed on the substrates 13a, 23a. According to this manufacturing method, the dummy sealing material 30a is printed in a plurality of parts along the outer periphery, and the dummy sealing material 30a is printed on one substrate 11 while avoiding the dummy alignment films 13a and 23a. All the liquid crystal display elements to be assembled at the same time are arranged so that the thickness of the alignment film 13゜23 printed by the letterpress printing method on the side substrate 11゜21 side is uniform and the frame-shaped sealing material 30
Since the device can have a uniform cell gap and have the same thickness on each side, it is possible to significantly improve the manufacturing yield of the liquid crystal display device.

In the above embodiment, a method for manufacturing a liquid crystal display element was described in which alignment films 1B and 2B were printed directly on the electrode formation surface of the side substrate 11.21. It can also be applied to the manufacture of a liquid crystal display element in which a covering insulating film is printed and an alignment film is printed thereon.

That is, FIG. 3 shows a second embodiment of the present invention. In this embodiment, an electrode covering insulating film (hereinafter simply referred to as an insulating film) 14 and a dummy insulating film 14a are provided on each element area and the outer peripheral edge of the substrate 11 on which display electrodes 12 are formed in each element area. are simultaneously printed using a printing roller on which a printing plate for the insulating film 14 and a printing plate for the dummy insulating film 14a are formed, and the insulating film 14 and the dummy insulating film 14a are printed at the same time.
An alignment film 13 and a dummy alignment film 13a are printed on the substrate 1 in the same manner as in the first embodiment, and then the substrate 1 is printed.
A frame-shaped sealing material 30 is applied to each element area on one side and the outer peripheral edge of the substrate.
This is a method of printing the dummy sealing material 30a using a screen printing method. Also in this embodiment, the dummy insulating film 14
a and the dummy alignment film 13a are printed in plural parts along the outer periphery of the substrate, and the dummy sealing material 30a is printed avoiding the dummy insulating film 14a and the dummy alignment film 13a. Note that the insulating film 14 and the dummy insulating film 14a are
For example, a solution of a silane-based organic compound is printed and dried or fired to obtain a silane-based inorganic compound (SiO2).

In this embodiment as well, the thicknesses of the insulating film 14 and alignment film 13 printed in each element region can be made uniform, and the amount of collapse of the frame-shaped sealing material 30 in each element region can also be made equal. Since the gap between the side substrates can also be made uniform over the entire substrate area, the gap between the substrates of all the assembled liquid crystal display elements can be made uniform.

Further, FIG. 4 shows a third embodiment of the present invention. In this embodiment, red, green, and blue color filters 15R, 115G, and 15B are respectively formed in each element region on the substrate 11 surface, and color filters 15R, 115G, and 15B are formed in each element region on the substrate 11 surface and at the outer peripheral edge of the substrate. , 5G, and 15B, and a dummy protective insulating film 16a whose film surface is flush with this protective insulating film 16 are formed. In addition, the protective insulating film 16 and the dummy protective insulating film 1 are formed.
6a, an insulating film 14, a dummy insulating film 14a, an alignment film 13, and a dummy alignment film 13 are formed on the same as in the second embodiment.
In this embodiment, the protective insulating film 816 and the dummy protective insulating film 16a are coated with polyimide or the like using a spin code method to form an insulating film with a flat surface over the entire surface of the substrate 11. This insulating film is formed by a patterning method. The dummy protective insulating film 16a is divided into a plurality of parts along the outer periphery of the substrate.
．． 4a and the dummy alignment film 13a, and the dummy sealing material 30a printed on the outer peripheral edge of the substrate avoids the dummy protective insulating film 16a, the dummy insulating film 14a, and the dummy alignment film 13a. is printed.

According to this embodiment, color filter 15R115G,
A dummy protective insulating film 16a whose film surface is flush with the transparent protective insulating film 16 that protects 15B is formed on the outer peripheral edge of the substrate, and a dummy insulating film 14a and a dummy alignment film 13a are printed on it. Color filter 15R, 1 on the board 11 side
Even with 5G and 15B, the thicknesses of the insulating film 14 and alignment film 13 printed in each element region can be made uniform.

In this embodiment, the protective insulating film 16 and the dummy protective insulating film 16a were formed by applying an insulating film using a spin code method and patterning it. The film 16a includes the insulating film 14, the dummy insulating film 14a, the alignment film 13, and the dummy alignment film 13.
Printing may be done using the letterpress printing method in the same way as printing in a. In that case, a dummy filter with the same thickness as the color filters 15R, 1, 5G, and 15B is also placed on the dummy protective insulating film printed portion on the outer periphery of the substrate. All you have to do is form it.

〔Effect of the invention〕

In the method for manufacturing a liquid crystal display element of the present invention, when printing an insulating film by letterpress printing, a dummy insulating film made of the same insulating material as the insulating film is also placed on the outer peripheral edge of the substrate, and the letterpress plate for printing the insulating film and the dummy insulating film are The dummy insulating film is printed simultaneously using a printing roller formed with a printing relief plate, and the dummy insulating film is divided into a plurality of parts along the outer periphery of the substrate, and the dummy insulating film is printed on one of the substrates. Although the sealing material is printed avoiding the dummy insulating film, all the liquid crystal display elements to be assembled at the same time are printed on the side substrate surface by letterpress printing so that the insulating film has a uniform thickness and a frame shape. It is possible to obtain an element with a uniform cell gap in which each side of the sealing material has the same thickness, and therefore the manufacturing yield of the liquid crystal display element can be improved.

[Brief explanation of the drawing]

1 and 2 are a manufacturing process diagram of a liquid crystal display element and a plan view of a substrate on which an alignment insulating film and a sealing material are printed, showing a first embodiment of the present invention, and FIG. 3 is a diagram showing a second embodiment of the present invention. A cross-sectional view of a substrate on which an insulating film and a sealing material are printed, showing an example of
The figure is a cross-sectional view of a substrate printed with an insulating film and sealant according to the third embodiment of the present invention, and FIGS. 5 and 6 are printed frame-shaped sealants and dummy sealants showing a conventional manufacturing method. FIG. 3 is a plan view and a cross-sectional view of the substrate. 11.21... Substrate, 12.22... Electrode, 13°23... Alignment film (orientation insulating film), 13g, 23a.
・°Dummy alignment film, 14... Electrode covering insulating film, 14a
...Dummy insulating film, 15R, 15G, 1.5B...
Color filter, 16... protective insulating film, 16a...
Dummy protective insulating film, 3o... frame sealing material, 3oa.
...Dummy seal material, 4o...Printing roller, 41...
・Roller body, 42... Letterpress plate for printing alignment film, 42a・
...Letterpress for printing dummy alignment film. Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A display electrode is formed in each element region of a pair of substrates having an area capable of collecting a plurality of liquid crystal display elements, and an insulating film is formed in each element region of both substrates using a letterpress printing method. After printing, a frame-shaped sealing material surrounding the outer periphery of the insulating film printed on each element region and a dummy sealing material along the outer periphery of the substrate are applied to each element area and the outer periphery of the substrate on one substrate. In the method for manufacturing a liquid crystal display element, in which a plurality of liquid crystal display elements are assembled at the same time by printing both substrates to the same thickness and then bonding the two substrates through the frame-shaped sealing material and the dummy sealing material, When printing the film by letterpress printing, a dummy insulating film made of the same insulating material as the insulating film is also placed on the outer peripheral edge of the substrate.
Simultaneously printing using a printing roller formed with the insulating film printing relief plate and the dummy insulating film printing relief plate, and printing the dummy insulating film by dividing it into a plurality of parts along the outer periphery of the substrate, A method of manufacturing a liquid crystal display element, characterized in that the dummy sealing material printed on the one substrate is printed while avoiding the dummy insulating film.