JPH01253713A - Production of liquid crystal display element - Google Patents

Abstract

PURPOSE:To prevent the flocculation of spacer particles so as to maintain the specified inter-substrate distance and to improve display grade by dispersing the particles into an org. soln. and coating the soln. on a substrate. CONSTITUTION:A thin film 2 consisting of indium tin oxide is formed by an EB vapor deposition method on the glass substrate 1. A photoresist 3 is then coated thereon and is subjected to patterning and dry etching to form transparent electrodes 4. The spacer particle 6 consisting of glass beads are dispersed into the org. soln. essentially consisting of ethanol contg. a silicon compd. and while the rotating speed is controlled by a spinner, the soln. is coated on the substrate and is sintered, by which the thin insulating film 5 consisting of SiO2 is formed thereon; in addition, the particles 6 are uniformly dispersed and stuck thereto to a desired thickness. Polyimide is then coated thereon to form the oriented film 7 and after the film is rubbed, the substrate is stuck to another substrate subjected to the similar treatments. by which the above-mentioned element is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a liquid crystal display element that can uniformly control the distance between substrates.

BACKGROUND OF THE INVENTION In recent years, efforts have been made to increase the area and capacity of liquid crystal display panels for application to new media equipment and OA equipment. With the increase in area and capacity, it has become necessary to uniformly control the distance (gap) between substrates of a liquid crystal display panel over a larger area with greater accuracy than ever before.

Traditionally, the gap control method for LCD panels involves scattering spacer particles such as glass beads or resin beads into the air and allowing them to settle onto the substrate.

The dry dispersion method is widely used.

Problems to be Solved by the Invention In the dry dispersion method, charging of the substrate, charging of spacer particles,
Spacer particles often aggregate due to moisture absorption, etc., and are not uniformly dispersed on the substrate. In the agglomerated areas, the gap becomes thicker when the substrates are bonded together, resulting in non-uniformity of the gap and failure of the alignment film of the liquid crystal, resulting in a reduction in display quality.

In view of the above problems, the present invention provides a method for manufacturing a liquid crystal display element that can uniformly control the gap.

Means for Solving the Problems In order to solve the above problems, the method for manufacturing a liquid crystal display element of the present invention involves dispersing spacer particles, which have the function of keeping the distance between substrates constant, in an organic solution. The spacer particles are applied onto a substrate and the spacer particles are dispersed onto the substrate.

Effect: According to the above manufacturing method, since the spacer particles are dispersed in the organic solution, the spacer particles are not electrically charged.

It is possible to prevent agglomeration due to moisture absorption, etc., and by uniformly dispersing spacer particles by coating using a spin code method or the like, it is possible to uniformly control the distance between the substrates.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 (al to +d) is a process diagram showing an example of the method for manufacturing a liquid crystal display element of the present invention.

To explain the steps according to the order of each figure, as shown in FIG. 1 fa+, a thin film 2 of indium tin oxide (I 2 To) is formed on a glass substrate 1 by EB evaporation. IT
The surface resistance value of O is 1007 points.

Thereafter, photoresist 3 is applied using a spinner. As shown in FIG. 1(b), patterning is performed by a predetermined method and dry etching is performed to form a transparent electrode 4.

Next, spacer particles 6 made of glass beads with a diameter of 2 μm are dispersed in an organic solution containing a silicon compound and mainly composed of ethanol.

As shown in FIG. 1(C), when the organic solution is applied onto the glass substrate using a spinner and then sintered, Si
An insulating thin film 5 of O□ is formed, and spacer particles 6 are formed thereon.
are uniformly dispersed without agglomeration.

Next, as shown in FIG. 1[dl], polyimide is applied to form an alignment film 7, rubbed, and then bonded to another glass substrate that has been treated in the same manner as described above.

FIG. 2 shows the relationship between the substrate rotation speed and the gap when an organic solution in which spacer particles 6 are dispersed is applied by a spinner. By controlling the substrate rotation speed, the gap can be uniformly controlled from 1.9 μm to 2.4 μm.

The liquid crystal display element manufactured by the above manufacturing method has a uniform gap over the entire panel, so there is no display unevenness, and compared to the conventional dry dispersion method, it is possible to obtain excellent display quality, and the manufacturing method is It is also extremely easy.

Next, other embodiments of the present invention will be described.

FIG. 1 (In C1, the density of spacer particles dispersed in the organic solution is Q, l wt%, Q, 2wt%.

Q: Change the amount to 3wt% and apply with a spinner. FIG. 3 shows the relationship between spacer particle density and gap in an organic solution. The gap can be controlled uniformly by using the spacer particle density as a parameter.
Similar to the embodiments described above, excellent display quality can be obtained.

In this example, the spacer particle diameter was 2 μm, but any gap can be formed by appropriately selecting the size of the spacer particles. Further, even if spacer particles are dispersed in an organic solution containing an alignment material and applied, uniform gap control can be achieved in the same way as described above.

Effects of the Invention In the method for manufacturing a liquid crystal display element of the present invention, spacer particles are dispersed in an organic solution and applied, which prevents agglomeration of spacer particles and creates a uniform gap, making it easy to improve display quality. It has a huge effect.

[Brief explanation of the drawing]

FIG. 1 is a process diagram of the method for manufacturing a liquid crystal display element of the present invention, and FIG.
The figure is a graph showing the relationship between the substrate rotation speed and the gap, and FIG. 3 is a graph showing the relationship between the spacer particle density and the gap. 5...Insulating thin film, 6...Spacer particles, 7...Alignment film. Name of agent: Patent attorney Toshio Nakao 1 name - Cabarrus 7- Distribution term Figure 1, q Figure 2 Difference type 0 Atsushi number Figure 3 Zu-Budoryo, *)icWt7-n

Claims (5)

[Claims] (1) Spacer particles that have the effect of keeping the distance between the substrates constant are dispersed in an organic solution, the organic solution is applied onto the substrate, and the distance between the substrates is made uniform by dispersing the spacer particles on the substrate. A method for manufacturing a liquid crystal display element characterized by maintaining (2) The liquid crystal according to claim (1), wherein the distance between the substrates is controlled by changing the concentration of spacer particles dispersed in the organic solution and controlling the density of the spacer particles dispersed on the substrates. Manufacturing method for display elements. (3) An organic solution in which spacer particles are dispersed is applied using a spinner, and the distance between the substrates is controlled by changing the number of rotations of the substrates during application.
1) or the method for manufacturing a liquid crystal display element according to claim (2). (4) The method for manufacturing a liquid crystal display element according to claim (1), wherein the organic solution contains a liquid crystal aligning material. (5) The method for manufacturing a liquid crystal display element according to claim (1), wherein the organic solution contains an insulating material, and the insulating material forms an insulating thin film on the substrate.