JPH10186375A - Production of liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to control the number of spacer materials to be attracted to the projecting parts of a stamp part for transfer by utilizing a tray to be closest-packed with the spacer materials. SOLUTION: Striped first transparent conductor 4 to be formed providing a prescribed space 3 to be a first electrode 2 is formed in pattern on a first substrate 1 consisting of a glass substrate. An oriented film 5 consisting of a polymide resin is formed on the first transparent conductor 4. Next, spacers 6 consisting of plastic beads are arranged in a closest packing state on the tray. These spacers 6 are pressed onto the projecting parts 9 of the stamp part 8 for transfer to transfer the spacers 6 onto the projecting parts 9. Since the projecting parts 9 of the stamp part 8 for transfer are formed by utilizing synthetic rubber, surface tacky adhesiveness may be assured. Next, the spacers 6 to be adhered on the projecting parts 9 of the stamp part 8 for transfer are pressed onto the oriented film 5 corresponding to the spacers 3 on the first substrate 1, by which the spacers 6 are transferred onto the oriented film 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device, and more particularly to a method for forming a spacer used to bond a first substrate and a second substrate with a predetermined gap. . In particular, the present invention relates to a manufacturing method for providing a spacer at a predetermined position on at least one of a first substrate and a second substrate for uniformity and improvement of display quality of a liquid crystal display device.

[0002]

2. Description of the Related Art In recent years, the display capacity of a liquid crystal display device using a liquid crystal panel has been steadily increasing. The structure of the liquid crystal display device includes a passive matrix type in which a display electrode of a liquid crystal pixel is directly connected to a signal electrode provided on a first substrate, and an active matrix type having a non-linear resistance element between the signal electrode and the display electrode. is there. Further, a counter electrode is provided via a liquid crystal so as to face the display electrode on the first substrate, a plurality of signal electrodes and a plurality of counter electrodes are arranged in a matrix, and the data electrode connected to the signal electrode and the counter electrode is arranged. It has a structure in which a predetermined signal is applied to the electrode from an external circuit.

[0005] The means of using multiplex driving in a liquid crystal display device having a simple matrix configuration (passive matrix type) causes a decrease in contrast or a reduction in response speed as time division is increased, so that about 200 scanning lines are required. If it does, it will be difficult to obtain sufficient contrast.

Therefore, in order to eliminate such a defect, an active matrix liquid crystal display panel in which switching elements are provided in individual pixels has been adopted.

The active matrix liquid crystal display panel is roughly classified into a three-terminal system using a thin film transistor and a two-terminal system using a non-linear resistance element. Among them, the two-terminal system is superior in that the structure and the manufacturing method are simple.

As the two-terminal switching element, a diode type, a varistor type, a TFD type and the like have been developed.

[0007] Among them, the TFD type has a feature that the structure is particularly simple and the manufacturing process is short.

The liquid crystal display device includes a signal electrode provided on a first substrate, a display electrode integrated with the signal electrode, a counter electrode provided on a second substrate, and a signal electrode provided on the first substrate and the second substrate. An alignment film for aligning the liquid crystal, the first substrate and the second
Are bonded to each other with a predetermined gap using a seal or the like, and a liquid crystal is sealed between the first substrate and the second substrate. Therefore, for example, a spacer made of a plastic material or a glass material is used to make a predetermined gap between the first substrate and the second substrate.

However, a general method of forming a spacer is a method in which a spacer material composed of beads of a plastic material or a glass material is sprayed on a substrate on average.
The method of spraying is a method of spraying only the spacer material. Alternatively, there is a method in which a solvent and a spacer material are mixed and used for spraying.

[0010]

The uniformity of the display quality of the liquid crystal display device depends on the distribution of the gap between the first substrate and the second substrate. Further, the transmittance is different between the portion without the spacer and the portion with the spacer. For example, if the spacer is transparent, the spacer becomes white during black display, deteriorating black display. If the spacer is non-transmissive, it becomes black and dark when white is displayed. Further, since the distribution of the above-mentioned influences is caused by the distribution of the spacers, the display becomes uneven.

Further, it has been experimentally found that the orientation of the liquid crystal is different between the periphery of the spacer and the portion without the spacer, so that the periphery of the spacer also affects the display quality.

For this reason, various methods have been devised for providing the spacer at a predetermined position. For example, a potential difference between the electrodes is provided, and the spacer material is selectively provided between the electrodes by mutual adoption of the potential of the spacer material. Alternatively, using a photosensitive resin, a method of forming a convex portion at a predetermined position by a photolithography method, a method of using a metal mask having an opening, and selectively providing a spacer material in a portion corresponding to the opening, Etc. However, the method of selectively forming the spacer material based on the potential difference between the electrodes has a large difference in effect due to the chargeability of the spacer material when the electrode width is wide, and furthermore, the chargeability of the spacer material is also different from the material of the spacer material. Therefore, it is necessary to select a spacer material.

Further, in the method in which the convex portion is provided using the photosensitive resin, the uniformity of the convex portion of the photosensitive resin poses a problem. Further, in the display mode in which the convex portion is used in a general passive matrix system, , For example, twisted nematic (T
N) or super twisted nematic (S
The TN) method requires a height of about 4 to 7 μm. Therefore, it is difficult to control the height distribution due to the relationship between the control of the thickness of the photosensitive resin and the viscosity. Here, there is also a method in which the convex portion of the photosensitive resin is provided by dividing the upper and lower substrates, but the process of providing the convex portion is doubled and complicated. Further, the step of providing the convex portions makes it difficult to perform uniform display because the orientation of the liquid crystal is lost. Further, in the method in which the spacers are scattered using the openings of the metal mask, variations occur due to the control of the number of spacers or the distance between the metal mask and the substrate.

An object of the present invention is to solve the above-mentioned problems and to provide a manufacturing method for simply providing a spacer material at a predetermined position which affects the display quality of the liquid crystal display device. It is for improving the quality.

[0015]

In order to achieve the above object, the liquid crystal display of the present invention employs the following manufacturing method.

The method for manufacturing a liquid crystal display device according to the present invention comprises:
Providing a spacer on at least one of the first substrate and the second substrate, wherein the step of providing a spacer on at least one of the first substrate and the second substrate comprises: A step of substantially closely filling the spacers on a tray for transfer, a step of pressing the protrusions from the tray onto the spacers on a transfer stamp portion having a protrusion at a predetermined location, and transferring the spacers from the tray, A step of pressing a transfer stamp portion against at least one of the substrate and the second substrate to transfer a spacer to a predetermined position of the substrate.

The method for manufacturing a liquid crystal display device according to the present invention comprises:
Providing a spacer on at least one of the first substrate and the second substrate, wherein the step of providing a spacer on at least one of the first substrate and the second substrate comprises: A step of almost completely filling the spacers on the tray for cleaning, a step of cleaning the protrusions of the transfer stamp portion having the protrusions at predetermined positions, and a process of bonding the spacers on the protrusions. A step of performing a process for bonding a spacer to at least one of the first substrate and the second substrate, and a process of pressing the spacer on the bonding portion on the protrusion from the tray and transferring the spacer from the tray. A step of pressing a transfer stamp portion against an adhesion processing portion on the first substrate or the second substrate and transferring a spacer to a predetermined position on the substrate. Characterized in that it has a.

The method for manufacturing a liquid crystal display device according to the present invention comprises:
The method of providing a spacer on at least one of the substrate and the second substrate includes the steps of: filling a spacer for a spacer on a spacer tray in a close-packed manner; cleaning the convex portion of the transfer stamp portion; Applying a pressure-sensitive adhesive on the convex portion, pressing the pressure-sensitive adhesive on the convex portion onto a spacer on a tray, and adhering a spacer, and applying the adhesive on at least one of a first substrate and a second substrate. The step of contacting the spacer, the step of heating at least one of the spacer or the convex portion, and reducing the viscosity of the adhesive by heating, the step of transferring the adhesive and the spacer from the convex portion to the substrate, Cooling and increasing the viscosity of the adhesive to fix the spacer on the substrate with the adhesive.

The method for manufacturing a liquid crystal display device according to the present invention comprises the following steps:
The method of providing a spacer on at least one of the substrate and the second substrate includes a step of almost closely filling the spacer on a tray for spacer, a step of charging the convex portion of the transfer stamp portion, A step of adsorbing a spacer from a tray on the charged convex portion, a step of contacting a spacer on the convex portion with at least one of a first substrate and a second substrate, and removing the electrification of the convex portion; Pressing a spacer on the substrate and transferring the spacer onto the substrate.

[0020]

The number of spacers adsorbed on the projections of the transfer stamp can be controlled by using a tray for filling the spacers in the closest packing. Furthermore, the tray is divided into a large number of rooms, and the spacers are arranged in a close-packed manner only at the necessary places, which is effective in shortening the time of being left in the air of the spacer material. Pollution can be prevented.

Furthermore, by utilizing the convex portion of the transfer stamp portion, the spacer material can be efficiently transferred only to the necessary portion, and at the same time, the transfer stamp portion can be transferred to the unnecessary portion on the substrate. Since there is no contact, contamination of the alignment film and the like with impurity ions can be prevented.

Furthermore, an adhesive layer is formed on the first substrate and / or the second substrate by using a convex portion of the transfer stamp portion at a portion where a spacer is formed, and further, a convex portion of the transfer stamp portion is formed. By transferring the spacer onto the adhesive layer using the part, the spacer can be fixed, so that the movement of the spacer in the manufacturing process can be prevented.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the method for manufacturing a liquid crystal display device of the present invention will be described below with reference to the drawings.

First, the manufacturing process of the liquid crystal display device according to the first embodiment of the present invention will be described with reference to the drawings. This will be described with reference to FIGS. 1, 2, 3, 4, 5 and 6.
FIG. 1 is a partially enlarged plan view of a liquid crystal display device according to an embodiment of the present invention. 2 to 6 are cross-sectional views showing the steps of the cross section taken along line AA shown in FIG. 1 of the present invention.
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, 4, 5, and 6. FIG.

First, as shown in FIG. 1, the first electrode 2 on the first substrate 1 and the second electrode 14 on the second substrate 11 face each other to form a pixel electrode portion. In order to form this structure, as shown in FIG. 2, on a first substrate 1 made of a glass substrate, a predetermined space 3 serving as a first electrode 2 is provided to form a first stripe-shaped first substrate 2. The transparent conductor 4 is patterned. On the first transparent conductor 4, an alignment film 5 made of a polyimide resin is formed. On the alignment film 5, for example, fine irregularities are formed by rubbing with a cloth. In FIG. 2, the irregularities on the alignment film 5 are omitted.

Next, as shown in FIG. 3, a spacer 6 made of 5 μm plastic beads is placed on the tray 7 in a close-packed manner, and the convex portion 9 of the transfer stamp portion 8 is pressed against the spacer 6. Then, the spacer 6 is transferred onto the projection 9. Since the convex portion 9 of the transfer stamp portion 8 uses synthetic rubber, surface tackiness can be ensured.

Next, as shown in FIG.
The spacer 6 attached on the projection 9 of the transfer stamp portion 8 is pressed onto the alignment film 5 corresponding to the upper space 3, and the spacer 6 is transferred onto the alignment film 5. As described above, the spacer 6 is not provided on the alignment film 5 on the transparent conductor 4.

Similarly, as shown in FIG.
On the upper surface, a stripe-shaped transparent conductor 14 provided so as to intersect with the first electrode 2 and provided with a predetermined space 13 is formed into a pattern to form the second electrode 12. An alignment film 1 made of a polyimide resin is formed on the transparent conductor 14.
5 is formed. On the alignment film 15, fine irregularities are formed by rubbing with a cloth, for example. In FIG. 5, the irregularities on the alignment film 15 are omitted. Further, the alignment film 1 on the second substrate 11
A sealing material 17 is formed on the substrate 5 by using a printing method in order to bond the first substrate 1 and the second substrate 11 with a predetermined gap. The sealing material 17 has an opening 19 for injecting a liquid crystal 18.

Further, as shown in FIG. 6, when used as a liquid crystal display device, the first substrate 1 and the second substrate 11 are used.
And a gap provided by a spacer 6 and a sealing material (not shown) to provide a predetermined gap.
8 is injected, and the opening is sealed with a sealing material (not shown), whereby a liquid crystal display device can be formed. The intersection of the first electrode 2 and the second electrode 12 becomes a pixel electrode. A predetermined voltage is applied between the first electrode 2 and the second electrode 12, and display is performed by utilizing the change in the voltage-transmittance of the liquid crystal 18 of the pixel electrode.

According to the above steps, the spacer 6 can be easily formed in the space 3 of the first electrode 2 and the space 13 of the second electrode 14 by using the projection 9 of the transfer stamp portion 8. Further, by setting the position of the projection 9 around the pixel electrode, the spacer 6 can be arranged only around the pixel electrode. For this reason, poor alignment of the liquid crystal 18 or the like generated around the spacer 6 can be provided in a region that does not affect display, so that display quality can be improved.

Further, since the number and position of the spacers 6 can be controlled, the uniformity of the gap between the first substrate 1 and the second substrate 11 can be improved, and the display quality of the liquid crystal display device can be made uniform. it can.

Next, a manufacturing process of the liquid crystal display device according to the second embodiment of the present invention will be described with reference to the drawings. FIG.
8, FIG. 9, FIG. 9, FIG. 10, and FIG. FIG. 7 to FIG. 11 are cross-sectional views each showing an enlarged cross section of a part of the liquid crystal display device according to the second embodiment of the present invention. Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 7, 8, 9, 10, and 11. FIG. Further, in steps similar to those in the first embodiment, the second embodiment will be described with reference to the drawings of the first embodiment.

First, as in FIG. 2 of the first embodiment, a first stripe-shaped first substrate 2 is formed on a first substrate 1 made of a glass substrate by forming a predetermined space 3 serving as a first electrode 2. Of the transparent conductor 4 is patterned. On the first transparent conductor 4, an alignment film 5 made of a polyimide resin is formed. On the alignment film 5, for example, fine irregularities are formed by rubbing with a cloth.

Next, as shown in FIG. 7, first, a photosensitive resin is formed on the convex portion 9 of the transfer stamp portion 8 by a stamp method, and then the photosensitive resin is formed on the space 3 of the first electrode 2. The adhesive layer 22 is formed by contacting the photosensitive resin. Since the photosensitive resin is mainly composed of a polyimide resin, the influence on the alignment film 5 can be minimized. Further, since the photosensitive resin is dried at 50 ° C. after printing, the viscosity can be maintained.

Next, as shown in FIG. 8, spacers 6 made of 7 μm plastic beads are arranged on the tray 7 in a close-packed manner. A vibrating part 23 is formed at the lower part of the tray 7 for the closest packing, and a squeegee 24 is provided on the upper surface of the tray 7. The distance between the tray 7 and the squeegee 24 is 1.5 times the size of the spacer 6 (10.5 μm), including the variation in the diameter of the spacer 6.
Are arranged with a gap. Further, the replenishment of the spacers 6 is intermittently replenished in the rotation direction of the squeegee 24 in a predetermined number. Thereby, the spacers 6 on the tray 7 are arranged in a close-packed manner.

Next, as shown in FIG. 9, the convex portion 9 of the transfer stamp portion 8 is pressed against the spacer 6 to transfer the spacer 6 onto the convex portion 9. Convex part 9 of transfer stamp part 8
Since synthetic rubber is used, surface tackiness can be ensured.

Next, as shown in FIG. 10, the spacer 6 attached to the projection 9 of the transfer stamp portion 8 is pressed onto the adhesive layer 22 corresponding to the space 3 on the first substrate 1, and the spacer 6 is pressed. 6 is transferred onto the adhesive layer 22. As described above, it is possible to prevent the spacer 6 from being provided on the alignment film 5 on the transparent conductor 4.

Here, the ultraviolet light 25 is applied to the first substrate 1
From the opposite side (back side) of the electrode 2 to cure the adhesive layer 22 made of a photosensitive resin. Therefore, the spacer 6 can be fixed to the space 3 by the adhesive layer 22.

Next, as in FIG. 5 of the first embodiment, a stripe-like pattern is formed on the second substrate 11 so as to intersect with the first electrode 2 and to form a predetermined space. The transparent conductor 14 is formed into a pattern to form the second electrode 12. An alignment film 15 made of a polyimide resin is formed on the transparent conductor 14. On the alignment film 15, fine irregularities are formed by rubbing with a cloth, for example. Further, a sealing material (not shown) is formed on the alignment film 15 on the second substrate 11 by a printing method in order to bond the first substrate 1 and the second substrate 11 with a predetermined gap. Formed. The sealing material has an opening (not shown) for injecting the liquid crystal 18.

Finally, as shown in FIG. 11, when used as a liquid crystal display device, the first substrate 1 and the second substrate 11 are used.
Are bonded by providing a predetermined gap with the spacer 6 and the sealing material, and the liquid crystal 18 is injected from the opening of the sealing material.
It can be formed by sealing the opening with a sealing material.
The intersection of the first electrode 2 and the second electrode 12 becomes a pixel electrode. A predetermined voltage is applied between the first electrode 2 and the second electrode 12, and display is performed by utilizing the change in the voltage-transmittance of the liquid crystal 18 of the pixel electrode.

According to the above steps, the spacers 6 can be easily provided on the tray 7 in a close-packed manner by the vibrating portion 23 and the squeegee 24 in which the spacers 6 are provided on the back surface of the tray 7. Therefore, it is possible to provide the spacer 6 on the convex portion 9 on the transfer stamp portion 8.

Further, the adhesive layer 22 is provided in the space portion 3 on the first substrate 1 by a printing method, the spacer 6 on the convex portion 9 is brought into contact with the adhesive layer 22, and furthermore, from the back of the first substrate 1 The adhesive layer 22 can be cured by irradiating ultraviolet rays 25, and the spacer 6 can be fixed. Further, since the spacer 6 is brought into contact with the adhesive layer 22 in a semi-dry state, the thickness distribution of the adhesive layer 22 hardly causes a problem, and a portion where the thickness of the underlayer is stable can be used.

Next, a manufacturing process of the liquid crystal display device according to the third embodiment of the present invention will be described with reference to the drawings. FIG.
2, FIG. 13, FIG. 14, and FIG. FIG.
2 to 15 are cross-sectional views showing a cross-sectional view in which a part of the liquid crystal display device according to the third embodiment of the present invention is enlarged. Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. 12, 13, 14, and 15. FIG. Further, in steps similar to those of the first embodiment, the third embodiment will be described with reference to the drawings of the first embodiment.

First, similarly to FIG. 2 of the first embodiment, a stripe-shaped third substrate formed by providing a predetermined space 3 to be a first electrode 2 on a first substrate 1 made of a glass substrate. One transparent conductor 4 is patterned. On the first transparent conductor 4, an alignment film 5 made of a polyimide resin is formed. On the alignment film 5, for example, fine irregularities are formed by rubbing with a cloth.

Next, as shown in FIG. 12, an adhesive 2 made of a polyimide resin is formed on the projection 9 of the transfer stamp 8.
Container 27 filled with polyimide resin to form 6
To the convex portion 9. Container 27 filled with polyimide resin
By rotating when the transfer stamp portion 8 is not in contact, the polyimide resin surface of the container 27 can be flattened. Further, the adhesive 26 having a uniform thickness can be formed by rotating and shaking off the polyimide resin formed on the convex portion 9 of the transfer stamp portion 8. Further, the adhesive 26 on the convex portion 9 of the transfer stamp portion 8 is pressed against the spacer 6 so that the spacer 6 is sunk into the adhesive 26.

Next, as shown in FIG. 13, a spacer 6 is cut into the adhesive 26 formed on the projection 9 of the transfer stamp 8 on the alignment film 5 corresponding to the space 3 on the first substrate 1. And presses the infrared lamp 28 to the first substrate 1
Irradiation is performed from the back surface of the adhesive, the viscosity of the adhesive 26 on the convex portion 9 is reduced, and the adhesive 26 is moved to the alignment film 5 via the spacer 6 and cooled to fix the spacer 6 on the alignment film 5.

Next, as shown in FIG. 14, a container 29 in which a pyrrolidone solvent is heated to 40 ° C. in order to remove the adhesive 26 on the projection 9 of the transfer stamp section 8 and clean the projection 9. A rotating roll 30 is provided therein, the protrusion 9 is immersed in at least a pyrrolidone solvent, and rubbing cleaning and ultrasonic cleaning by the rotating roll 30 are used in combination. Further, the surface is replaced with acetone, and the surfaces of the projections 9 and the transfer stamp 8 are washed.

Next, similarly to FIG. 5 of the first embodiment, a stripe shape is formed on the second substrate 11 so as to intersect with the first electrode 2 and to form a predetermined space 13. Patterning the transparent conductor 14 of the second electrode 1
Let it be 2. An alignment film 15 made of a polyimide resin is formed on the transparent conductor 14. On the alignment film 15, for example,
Fine irregularities are formed by rubbing with a cloth. Further, a sealing material 17 is formed on the alignment film 15 on the second substrate 2 by using a printing method so as to bond the first substrate 1 and the second substrate 11 with a predetermined gap. The sealing material 17 has an opening 19 for injecting a liquid crystal 18.

Finally, as shown in FIG. 15, when used as a liquid crystal display device, the first substrate 1 and the second substrate 1 are used.
1 can be formed by providing a predetermined gap between the spacer 6 and a sealing material (not shown), injecting a liquid crystal 18 through an opening of the sealing material, and sealing the opening with a sealing material. The intersection of the first electrode 2 and the second electrode 12 becomes a pixel electrode. First electrode 2 and second electrode 1
A predetermined voltage is applied between the two electrodes and the liquid crystal 18 of the pixel electrode is applied.
Is displayed by using the change in the voltage-transmittance.

According to the above steps, the surface of the polyimide resin can be flattened by rotating the container 27 of the polyimide resin, so that the adhesive 26 can be uniformly formed on the projection 9. Furthermore, if the protrusions 9 are only formed on the polyimide resin by a stamp method, the adhesive 26 on the protrusions 9 will be partially undulated. Is performed, the excess adhesive material 26 can be shaken off and flattened.

Further, the spacer 6 and the adhesive 26 can be simultaneously fixed on the first substrate 1 by transferring the adhesive 26 on the projection 9 to the first substrate 1 by heat treatment.

Next, a manufacturing process of the liquid crystal display device according to the fourth embodiment of the present invention will be described with reference to the drawings. The fourth embodiment is an example in which a two-terminal nonlinear resistance element is provided on a first substrate 1. In this example, a spacer 6 is provided on the second substrate. FIG. 16 is a plan view enlarging a part of the liquid crystal display device of the present embodiment. FIGS. 17, 18, 19, and 20 show the manufacture of a portion corresponding to a cross section taken along line BB of FIG. It is sectional drawing which shows a process. Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. 16, 17, 18, 19, and 20.

First, as shown in FIG. 16, on a first substrate 1 composed of a glass substrate, a signal electrode 31 composed of a tantalum (Ta) film and a lower electrode 32 integrated with the signal electrode 31 are formed.
Is patterned. Further, a non-linear resistance layer 33 made of a tantalum oxide (TaOx) film, which is an anodized tantalum film, is formed on the signal electrode 31 and the lower electrode 32.
Further, the display electrode 36 having a predetermined gap with the signal electrode 31 and the upper electrode 34 which is an integral structure with the display electrode 36 and which overlaps with the nonlinear resistance layer 33 on the lower electrode 32 are formed by patterning. Lower electrode 32 and nonlinear resistance layer 33
And the upper electrode 34 form a nonlinear resistance element 35. An alignment film 15 having minute unevenness is formed on the first substrate 1.

Next, as shown in FIG. 17, a black matrix 37 made of a chromium (Cr) film provided on the second substrate 11 so as to partially overlap the display electrodes 36 on the first substrate 1. Form a pattern. A green color filter 39, a red color filter 40, and a blue color filter (not shown) are formed on the second substrate 11 so as to overlap a part of the black matrix 37. The mutual color filters have gaps 42 on the black matrix 37. Further, a protective insulating film 41 is formed on the color filters 39 and 40 and the black matrix 37 by patterning. Color filter 3
The protective insulating film 41 provided in the gap between 9 and 40 has a very small thickness distribution as compared with the color filter. for that reason,
A method of providing the spacer 6 in the gap between the color filters on the black matrix 37 is adopted.

Further, a second electrode (counter electrode) 43 is formed on the protective insulating film 41 and on the second substrate 11 in a stripe pattern. On the second electrode 43, the alignment film 15 made of a polyimide resin is formed. On the alignment film 15,
For example, fine irregularities are formed by rubbing with a cloth. In the drawing, irregularities on the alignment film 15 are omitted.

Next, as shown in FIG. 18, the projection 9 on the transfer stamp 8 is subjected to a charging process. As for the method of charging, synthetic fibers are rubbed at high speed to charge the synthetic fibers. Next, the convex portion 9 is charged by bringing the synthetic fiber into contact with the convex portion 9. At this time, the chargeability of the projection 9 is maintained by rotating the synthetic fiber 48 in a state where the projection 9 is in contact with the synthetic fiber. Further, as shown in FIG. 19, a spacer 6 made of 5 μm plastic beads is arranged on the tray 7 and the charged convex portion 9 of the transfer stamp portion 8 is pressed against the spacer 6.
The spacer 6 can be adsorbed on the projection 9.

Next, as shown in FIG. 20, the transfer stamp portion 8 for adsorbing the spacer 6 is turned upside down, steam is flowed from the humidifying nozzle 49 into the chamber 50, and the humidified atmosphere 51 is left. After erasing the charge of the spacer 9, the spacer 6 on the projection 9 is pressed against the alignment film 15 on the second substrate 11, so that the spacer 6 is aligned with the alignment film 1.
5 can be transferred.

Next, as shown in FIG. 5 of the first embodiment, when used as a liquid crystal display device, the first substrate 1
The second substrate 11 is bonded to the second substrate 11 by providing a predetermined gap with the spacer 6 and the sealing material 17, the liquid crystal 18 is injected from the opening 19 of the sealing material 17, and the opening 19 is sealed with a sealing material. . The display electrode 36
The intersection between the first electrode 43 and the second electrode 43 becomes a pixel electrode. A predetermined voltage is applied between the display electrode 36 and the second electrode 43, and display is performed by utilizing a change in the voltage-transmittance of the liquid crystal 18 of the pixel electrode.

Through the steps described above, the spacers 6 can be effectively adsorbed on the projections 9 by charging the projections 9 on the transfer stamp section 8. Furthermore, by leaving the projections 9 and the spacers 6 in a humidified atmosphere, the charging ability is reduced, and the spacers 6 can be easily transferred onto the alignment film 15.

By utilizing the above-described method of manufacturing the liquid crystal display device, since no special process is used on the first substrate 1 on which the non-linear resistance element 35 is formed, the characteristics of the non-linear resistance element 35 are deteriorated. Nothing. Further, since the transfer stamp portion 8 and its convex portion 9 are charged when the spacer 6 is adsorbed, and the charge is erased before the spacer is brought into contact with the substrates 1 and 11, damage to the substrate is reduced. Does not occur.

Next, an embodiment of the transfer stamp portion 8 and the projection 9 used in the present invention will be described with reference to the drawings. FIG.
1 is a plan view showing the transfer stamp portion 8 and the convex portion 9, and FIG. 22 is a cross-sectional view taken along line CC of FIG.
Hereinafter, the transfer stamp portion 8 and the convex portion 9 will be described with reference to FIGS. 21 and 22.

The transfer stamp portion 8 and the projection 9 are provided with a plurality of porous holes 53. The hole 53 reaches the upper and lower surfaces of the transfer stamp portion 8 and the convex portion 9. However, an airtight layer 54 for closing the hole 53 is provided on the transfer stamp portion 8 other than the convex portion 9. Therefore, when a spacer (not shown) is sucked by the convex portion 9, the spacer is sucked from the surface on the opposite side to the convex portion 9 so that the spacer 9
Adsorb on top. Further, when attaching the spacer on the substrate, the spacer is detached from the projection 9 and transferred onto the substrate by slightly injecting nitrogen into the hole 53.

Therefore, it is effective to form the transfer stamp portion 8 and the convex portion 9 using a porous material. further,
In order to make the space between the first substrate and the second substrate uniform, the spacers need to be dispersed on average, and further, if there is no spacer in the target portion, the first substrate and the second substrate are not dispersed. It is important to provide at least one or more spacers because uniform pressure cannot be applied in the process for making the gap uniform. Therefore, the size of the projection 9 on the transfer stamp 8 is at least twice the diameter of the spacer 5 used. As a result, the projections 9 are provided with 2
One spacer can be adsorbed and one or more spacers can be adsorbed.

[0064]

As is apparent from the above description, the number of spacer materials adsorbed on the projections of the transfer stamp portion can be controlled by using the tray in which the spacer materials are closest packed. Furthermore, the tray is divided into a large number of rooms, and the spacers are arranged in a close-packed manner only at the necessary places, which is effective in shortening the time of being left in the air of the spacer material. Pollution can be prevented.

Further, by utilizing the convex portion of the transfer stamp portion, the spacer material can be efficiently transferred only to the necessary portion, and at the same time, the transfer stamp portion can be transferred to the unnecessary portion on the substrate. Since there is no contact, contamination of the alignment film and the like with impurity ions can be prevented.

Further, an adhesive layer is formed on at least one of the first substrate and the second substrate at a portion where a spacer is to be formed by using a convex portion of the transfer stamp portion. By transferring the spacer onto the adhesive layer using the part, the spacer can be fixed, so that the movement of the spacer in the manufacturing process can be prevented.

In the fourth embodiment of the present invention, the manufacturing method has been described with respect to the case where a two-terminal type nonlinear resistance element is used. However, the case where the present embodiment is used with the case where a three-terminal type nonlinear resistance element is used. Also in this case, the effect of the production method of the present invention is naturally effective. In the case of the three-terminal type, since the area where the nonlinear resistance element is provided has a large step,
The spacer 6 is not provided. Further, the spacer 6 is not provided on the gate electrode connected to the signal electrode or the source electrode connected to the data electrode because there is a step, and the spacer 6 is provided at the center of the display electrode. The gap between the substrate and the second substrate can be made uniform.

[Brief description of the drawings]

FIG. 1 is an enlarged plan view of a part of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a manufacturing process of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 3 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 4 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 5 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 6 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 7 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the second embodiment of the present invention.

FIG. 8 is a schematic diagram showing a spacer tray used in the second embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating a manufacturing process of the liquid crystal display device according to the second embodiment of the present invention.

FIG. 10 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the second embodiment of the present invention.

FIG. 11 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the second embodiment of the present invention.

FIG. 12 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the third embodiment of the present invention.

FIG. 13 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the third embodiment of the present invention.

FIG. 14 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the third embodiment of the present invention.

FIG. 15 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the third embodiment of the present invention.

FIG. 16 is a diagram illustrating a planar shape of a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 17 is a sectional view showing a final form of a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 18 is a conceptual diagram illustrating a mechanism for charging a convex portion on a transfer stamp unit used in a fourth embodiment of the present invention.

FIG. 19 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the fourth embodiment of the present invention.

FIG. 20 is a sectional view illustrating a manufacturing process of the liquid crystal display device according to the fourth embodiment of the present invention.

FIG. 21 is a plan view showing a planar shape of a convex portion on a transfer stamp portion of the present invention.

FIG. 22 is a cross-sectional view showing a cross-sectional shape of a projection on the transfer stamp unit of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st board | substrate 2 1st electrode 3 Space 6 Spacer 7 Tray 8 Transfer stamp part 9 Convex part 22 Adhesive layer 23 Vibration part 24 Squeegee 25 Ultraviolet lamp 26 Adhesive layer 28 Infrared lamp 31 Signal electrode 32 Lower electrode 33 Nonlinear resistance Layer 34 upper electrode 35 non-linear resistance element

Claims (7)

[Claims] 1. A method for manufacturing a liquid crystal display device, comprising: providing a spacer on at least one of a first substrate and a second substrate of the liquid crystal display device. The step of providing a spacer on at least one of the steps includes a step of substantially closely filling the spacer on a spacer tray, and pressing the convex part from the tray against the spacer against a transfer stamp part having a convex part in a predetermined part. A liquid crystal comprising: a step of transferring a spacer from a tray; and a step of pressing a transfer stamp portion on at least one of the first substrate and the second substrate to transfer the spacer to a predetermined position on the substrate. A method for manufacturing a display device. 2. A method for manufacturing a liquid crystal display device, comprising: providing a spacer on at least one of a first substrate and a second substrate of a liquid crystal display device. The step of providing a spacer on at least one of the step, a step of substantially close-packing the spacer on the tray for the spacer, a step of cleaning the convex portion of the transfer stamp portion having a convex portion at a predetermined position, A step of performing a process of bonding a spacer on the convex portion, a process of performing a process of bonding the spacer on at least one of the first substrate and the second substrate, and a process of bonding the spacer on the convex portion from the tray. Transferring the spacer from the tray by pressing the spacer against the spacer, and the first substrate or
A method for manufacturing a liquid crystal display device, comprising: a step of pressing a transfer stamp section against an adhesion processing section on a second substrate to transfer a spacer to a predetermined position on the substrate. 3. A method of providing a spacer on at least one of the first substrate and the second substrate, wherein the step of substantially closely filling the spacer on a spacer tray, and the step of projecting the transfer stamp portion. Cleaning the top,
A step of applying an adhesive on the convex portion, a step of pressing the adhesive on the convex portion onto a spacer on the tray and bonding the spacer, and a step of applying the convex portion to at least one of a first substrate and a second substrate. A step of contacting the upper spacer, a step of heating at least one of the spacer or the convex part, and a step of reducing the viscosity of the adhesive by heating and transferring the adhesive and the spacer from the convex part onto the substrate. 3. The method of manufacturing a liquid crystal display device according to claim 1, further comprising a step of cooling, increasing a viscosity of the adhesive, and fixing a spacer on the substrate with the adhesive. 4. A method of providing a spacer on at least one of the first substrate and the second substrate, comprising the steps of: filling a spacer on a tray for spacers in a closest-closed manner; Charging a top, adsorbing a spacer from a tray on the charged protrusion, contacting a spacer on the protrusion with at least one of a first substrate and a second substrate, 3. The method for manufacturing a liquid crystal display device according to claim 1, further comprising: removing a charge of the convex portion, and pressing a spacer on the substrate to transfer the spacer onto the substrate. 5. The method for manufacturing a liquid crystal display device according to claim 1, wherein the area of the protrusion of the transfer stamp portion is at least two or more of the cross-sectional area of the spacer. . 6. A non-display area around a pixel electrode comprising a portion where a display electrode and a counter electrode overlap each other, wherein an area where a spacer is transferred to at least one of the first substrate and the second substrate is provided. The method for manufacturing a liquid crystal display device according to claim 1, 2, 3, or 4. 7. The method according to claim 1, wherein a portion for transferring a spacer to at least one of the first substrate and the second substrate is provided in a portion of the substrate having a minimum height distribution. 5. The method for manufacturing a liquid crystal display device according to 3 or 4.