JPS6269237A - Manufacture of liquid crystal display element - Google Patents

Abstract

PURPOSE:To decrease manufacture manhours and to reduce cost by using cleaning liquid to which a water repelling agent with low concentration is added and applying the water repelling agent to necessary parts of a liquid crystal cell while cleaning other parts. CONSTITUTION:The whole liquid crystal cell 8 is cleaned with the cleaning liquid to which the water repelling agent is added after the liquid crystal cell 8 is completed and before a polarizing plate is provided. The cleaning water which contains the water repelling agent is prepared by adding the water repelling agent to the cleaning liquid by 0.005wt% concentration. Then, the whole liquid crystal cell 8 is dipped and cleaned in said cleaning liquid twice and then cleaned once with an ultrasonic wave, and the liquid crystal cell 8 is drawn out of the cleaning liquid and then cleaned with vapor of the cleaning liquid containing the water repelling agent lastly. Consequently, dew condensation and sticking of other water at extremely small groove parts are prevented by the water repelling function of the water repelling agent contained in the cleaning liquid which is stuck in extremely small groove parts at an electrode lead-out part.

Description

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

[Prior art]

As shown in FIG. 2, the liquid crystal cell 8 in the manufacturing process before the polarizing plate is provided has transparent electrodes 1, .
, 2... are formed on the two glass substrates 3 and 4,
The glass substrates 3 and 4 are arranged to face each other at a predetermined interval, and are configured to fill a space between these glass substrates 3 and 4 with liquid crystal 5, and to seal this liquid crystal 5 with a sealing material 6. One of the above substrates 4
An electrode terminal extension part 4a extending outward from the sealing material 6 is formed at one end of the sealing material 6, and on this electrode terminal extension part 4a, the electrode terminal made of a relatively highly chemically reactive electrode material is formed. Electrode 2
Each terminal 2a... is provided. Also, at one end of the other substrate 3, an edge portion 3a that slightly protrudes outward from the sealing material 6 is formed. In this way, since the plurality of electrode terminals 2a are provided on the electrode terminal extension part 4a of the one substrate 4, water repellency is ensured in the electrode terminal extension part 4a. This is important in preventing corrosion of each terminal 2a due to moisture and maintaining product quality.

However, in reality, the distance between the two substrates 3 and 4 is as small as about 10 mm, and the electrode terminal is not provided in the air space surrounded by the electrode terminal extension portion 4a, the edge portion 3a, and the sealing material 6. Since a very small groove part 7 is formed in a part of the pull-out part, when a water droplet 9 enters this very small groove part 7 due to condensation or the like, as shown in FIG. It becomes easier to straddle between the matching terminals 2a. At this time, since the magnitudes of the voltages applied to both terminals 2a are different, a potential difference is generated between both terminals 2a, and a local current flows inside the water droplet 9 due to this potential difference. As a result, a corrosion reaction occurs between the terminals 2a, 2a and the water, and as this condition progresses, there is a problem in that the terminals 2a, 2a may become disconnected over time.

In order to deal with this problem, the entire surface of the substrates 3 and 4, including the micro grooves 7 at the electrode extraction parts, is immersed in a T8 solution with a concentration of 1 wt% to prevent moisture infiltration, and then the quality is maintained. As a purpose, it is conceivable to perform a cleaning process to remove the water repellent agent adhering to parts other than the micro groove part 7. However, in the above method, the liquid crystal cell 8
After being immersed in a solution of liquid crystal cell, a separate cleaning step is required to remove the liquid crystal cell 1B adhering to other parts of the liquid crystal cell 8 except for the very small groove 7 and to maintain quality. However, there are problems such as an increase in manufacturing man-hours and an increase in product cost.

[Purpose of the invention]

The present invention has been made in consideration of the above conventional problems, and uses a cleaning liquid to which a low concentration of water repellent is added.
The purpose of the present invention is to provide a method for manufacturing a liquid crystal display element that reduces manufacturing man-hours and costs by simultaneously applying Ja liquid to the necessary parts of the liquid crystal cell and cleaning other parts. That is.

[Structure of the invention]

The method for manufacturing a liquid crystal display element according to the present invention includes at least an electrode terminal extraction portion on the outer surface of the liquid crystal cell when cleaning a liquid crystal cell formed by filling liquid crystal between two substrates having electrodes on opposing surfaces. By applying a cleaning solution containing 1'Ω water agent to the area, the application process of 1'Ω water agent and cleaning process are performed simultaneously, and the conventional application process of water repellent agent and unnecessary TA water agent are removed. The two steps of cleaning and cleaning to maintain high quality can be accomplished in one step by applying this using a cleaning solution containing a water repellent to which a predetermined concentration of F8 water agent has been added. It is characterized by the fact that

〔Example〕

An embodiment of the present invention will be described below based on FIG. For convenience of explanation, the same reference numerals are used for components having the same functions as those shown in FIG. 2, and the basic structure of the liquid crystal display element shown in FIG. 1 is similar to that shown in FIG. Since they are similar, explanations of parts that overlap with the structure of FIG. 2 described above will be omitted.

In the manufacturing process of a liquid crystal display element, at a stage after the liquid crystal cell 8 is completed and before a polarizing plate (not shown) is provided, the entire liquid crystal cell 8 is cleaned with a cleaning liquid to which ↑C water solution is added.

The above-mentioned TA solution-containing cleaning solution is one in which an iQ solution is added to the cleaning solution at a concentration of, for example, 0.005 wt %.

As the above-mentioned cleaning liquid, for example, S-3 [1-1 manufactured by Daikin
-21-lichlorotrifluoroethane], and the water repellent is, for example, Daikin M5188 [
A 1 wt % diluted solution with a solvent using the above S-3 as a base] is used.

The above cleaning method includes immersion cleaning the entire liquid crystal cell 8 twice using the water repellent-containing cleaning solution described in -, then performing ultrasonic cleaning once, and finally cleaning the liquid crystal cell 8 with the water repellent-containing cleaning solution. This is done by lifting it from the water repellent and performing steam cleaning with the above-mentioned water repellent-containing cleaning liquid.

As shown in FIG. 1, the liquid crystal cell 8 that has been subjected to the above cleaning treatment is surrounded by at least the electrode terminal extension portion 4a of the substrate 4, the edge portion 3a, and the sealing material 6 at the electrode terminal extraction portion. A single molecule N10 of the 1B liquid medication is attached to the extremely small groove portion 7. Furthermore, a monomolecular layer 10 of the water repellent agent is also attached to parts of the liquid crystal cell 8 other than the above-mentioned extremely small groove part 7, but the adhesion of this monomolecular layer 10 is the same as that after cleaning by the conventional method. Therefore, there will be no quality problems.

If the water repellent contained in the above-mentioned water repellent-containing cleaning solution is too concentrated, the water repellent adhering to areas other than the tiny grooves 7 may cause problems such as stains on the element surface and deterioration of the polarizing plate. This will cause the above problem. On the other hand, if the concentration of the water repellent agent is too low, the amount of tΩ water agent that adheres to the extremely small groove portion 7 will be small, resulting in the problem that a sufficient water repellent function cannot be obtained in the extremely small groove portion 7 at the electrode terminal lead-out portion. will occur.

In the manufacturing method of the present invention, the concentration of the water repellent is set to 0.
．． It is desirable that the range is from 0.05 wt% to 0.001 wt%. When set to the above concentration range, this
As for water repellency, as a result of high-temperature storage test and high-temperature high-temperature energization test, no abnormalities were observed with 100011r, respectively.In terms of quality, dirt on the surface of the element could be sufficiently removed, and the liquid crystal could be removed after cleaning. This is because it was confirmed that the polarizing plate attached to the surface of the cell 8 did not deteriorate and maintained high quality.

〔Effect of the invention〕

The method for manufacturing a liquid crystal display element according to the present invention is as described above.
2. By cleaning the liquid crystal cell at a stage after the completion of the liquid crystal cell using a cleaning solution containing a tΩ water solution added with a water repellent, the area including the extremely small groove formed in the electrode terminal extraction area outside the sealing material can be cleaned. It is possible to apply IQ solution to the body and clean other parts at the same time. As a result, the water-repellent function of the 18 water agent contained in the cleaning solution, which is attached to the extremely small groove of the electrode terminal pull-out area, prevents condensation and other moisture from adhering to the extremely small groove, thereby preventing corrosion of the electrode terminal and preventing corrosion of the electrode terminal. It is possible to reliably avoid situations such as disconnection of electrode terminals due to. Furthermore, since the outer surface of the liquid crystal cell is simultaneously washed with the water repellent-containing cleaning liquid to remove dirt, a high-quality liquid crystal display element can be manufactured. Moreover, in the present invention, the two conventional processes of applying a water repellent and cleaning can be performed simultaneously in one process, so it has the effect of reducing manufacturing man-hours and, in turn, reducing costs. play.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, showing the state after treatment with a cleaning solution containing TA solution, FIG. 2 is a vertical cross-sectional view showing the basic structure of a liquid crystal cell used in a conventional example, and FIG. The figure is the second
FIG. 2 is an explanatory diagram of a main part showing a state in which water droplets have entered the extremely small groove portion of the electrode terminal lead-out portion of the liquid crystal cell shown in the figure. 1 and 2 are transparent electrodes, 3 and 4 are substrates, 4a is an extension part for electrode terminals, 5 is a liquid crystal, 6 is a sealing material, 7 is a very small groove part of an electrode extension part, 8 is a liquid crystal cell, 1° is ↑8 It is a monomolecular layer of a liquid medicine. Patent applicant Sharp Corporation Figure 1

Claims (2)

[Claims] 1. When cleaning a liquid crystal cell formed by filling liquid crystal between two substrates with electrodes provided on opposing surfaces, applying a cleaning liquid containing a water repellent to at least a portion of the outer surface of the liquid crystal cell that includes an electrode terminal extraction portion. A method of manufacturing a liquid crystal display element, characterized in that a water repellent coating process and a cleaning process are performed simultaneously. 2. The above water repellent-containing cleaning liquid has a water repellency of 0.05 to 0.00.
The method for manufacturing a liquid crystal display element according to claim 1, wherein the concentration is set within a range of 1 wt%.