JPS62143025A - Manufacture of electrode substrate for bisected multiple matrix type liquid crystal display element - Google Patents

Abstract

PURPOSE:To inspect the presence or absence of short-circuit of a signal electrode with good workability and efficiently by connecting both edges of a tightly parallel signal electrode to the electrode of both edges of the substrate and contacting the terminal of a checking circuit to each signal electrode. CONSTITUTION:On a glass substrate 1, many signal electrodes 2 are made parallel tightly, and an edge part 2a is respectively to an electrode 3 for checking provided at both edge parts 1a of the substrate. The terminal of both edges of a shorting checking circuit is brought into contact with both sides of the electrode 3, and the presence or absence of the short-circuit of the electrodes 2 are checked. Next, the middle part of the electrodes 2 is bisected by a laser beam, the substrate to cut out the substrate along a parting line (a) and a substrate B to provided a scanning electrode 5 at other substrate 4 are faced each other, between them, a liquid crystal 6 is sealed and a liquid crystal display element is assembled. Consequently, The presence or absence of the short-circuit of a signal electrode are simply checked and the electrode substrate can be efficiently obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method for manufacturing an electrode substrate for a two-division multiple matrix type liquid crystal display element that displays an image through a liquid crystal material.

[Technical background of the invention and its problems]

A matrix type liquid crystal display element has a liquid crystal material between a first electrode substrate having a large number of signal electrodes and a second electrode substrate having a large number of scanning electrodes along a direction orthogonal to the signal electrodes. A predetermined voltage is applied between the selected signal electrode and the scanning electrode through the leads connected to each of the signal electrodes, and P&crystalline substance molecules are applied at the intersection of the signal electrode and the scanning electrode. It behaves to form dots based on the transmission or blocking of light, and these dots are combined to display a predetermined image.

In such a matrix-type liquid crystal display element, each signal electrode parallel to the first electrode substrate is divided into two at the middle part, and an electrode group on one side of the electrode substrate and an electrode group on the other side are divided into two. Separated from the electrode group on the side, a lead is connected to each signal electrode, and each electrode group is driven by an individual drive circuit through these leads, thereby controlling a large number of dots at high speed and improving resolution. There is a two-division multiplex matrix method that can improve the performance.

By the way, the signal electrode is formed by depositing an electrode material such as indium oxide on one side of a glass substrate and removing unnecessary portions of this 1ffl material film by photoetching. In order to improve the clarity of the displayed image, it is important to narrow the distance between adjacent signal electrodes as much as possible to reduce the width between dots.

However, if the distance between the signal electrodes (width of the etched portion) is made too narrow, insufficiently etched portions will remain, often resulting in short-circuiting between adjacent signal electrodes.

Therefore, after forming the signal electrodes on the substrate, it is necessary to check all the signal electrodes for short circuits between adjacent electrodes. Conventionally, this check has been carried out by visually observing each of the adjacent parallel signal electrodes using a microscope, or by connecting one of the adjacent signal electrodes to a short-circuit check circuit (generally, a current measurement circuit of a tester is used). ), and the negative terminal of one electrode is brought into contact with the other, and the presence or absence of a circuit is checked by sequentially performing this operation on each adjacent electrode. However, with this method,
Particularly, the above-mentioned two-division multiplex matrix type liquid crystal display element has the disadvantage that workability is extremely poor and a great deal of labor and long TI# are required.

[Purpose of the invention]

This invention was made with attention to these points, and its purpose is to provide a two-division multiple matrix type liquid crystal display device that can efficiently check for short circuits between signal electrodes with good workability. f[An object of the present invention is to provide a method for manufacturing a substrate.

[Summary of the Invention] That is, the present invention forms a large number of signal electrodes in parallel on a substrate, and also forms short-circuit check electrodes in the margins on both sides of the substrate that are cut off with a knife. Alternately lead out the ends of the electrodes one by one to opposite sides and connect them to the short circuit check electrode, one terminal of the short circuit check circuit is connected to one of the short circuit check electrodes, and the other terminal is connected to the other short circuit check electrode. to check the presence or absence of a short circuit between the adjacent signal electrodes by contacting the electrodes for short-circuit checking, and then dividing the intermediate portion of each of the signal electrodes to form an electrode group on one side of the substrate; The substrate is separated from the electrode group on the other side, and each margin of the substrate is cut off.

[Embodiments of the invention]

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

In FIG. 1(a), 1 is a substrate made of glass, for example,
A large number of signal electrodes 2 are arranged closely in parallel on one side of the substrate 1. The substrate 1 has margins 1a, 1a on both sides thereof, and these margins 1a, 1a are cut off from the dividing lines a, a with a cutout. And these margins 1
a, 1a1. 4ffi3.3 for near and Q connection check is installed. Each signal@electrode 2... arranged in parallel on the substrate 1 is alternately led out to the opposite side by crossing the dividing line a, a with one end side serving as a terminal part 2a... Connected to short circuit check electrode 3.3. Note that the signal Mlfi2... and its terminal section 2a
. . . and the short circuit check electrode 3 . . . are connected to the substrate 1.
While an electrode material such as indium oxide is deposited on the entire one side of the electrode material, unnecessary parts of this electrode material film, that is, each signal electrode 2...
Terminal portion 2a..., short-circuit check electrode 3...are integrally formed by removing the other portions except for the raised portion by photo-etching.

In the state shown in FIG. 1(a), one terminal of the short-circuit check circuit is brought into contact with an arbitrary point on one of the short-circuit check electric buckets 3 on the board 1, and the other terminal is similarly connected to the other short-circuit check circuit. The electrode 3 is brought into contact with an arbitrary location, thereby checking whether or not there is a short circuit between adjacent signal electrodes 2 .

After checking for short circuits in this way, if it is confirmed that there is no short circuit, then apply a neodymium YAG laser beam (wavelength:
1.06μ), and divide each signal electrode 2 into two equally as shown in FIG. separated from the electrode group β. Also,
For those confirmed to have a short circuit, each signal electrode 2.
. . are scanned with, for example, a neodymium YAG laser beam to cut off the short circuit, and then each signal electrode 2 . . . is divided into two in the same manner as described above. Next, as shown in FIG.
.

Cut along line a. This completes the electric AI substrate A for the signal electrodes, so the electrode substrate A for the signal electrodes is
For scanning electrodes shown in FIG.
As shown in FIG. 3, a liquid crystal material 6 is filled and sealed between the electrode substrates B to form a liquid crystal display element.

In the above embodiment, one short-circuit check electrode was formed in the blank area of the board, but two sets of each signal electrode were formed.
Alternatively, the circuit board may be divided into more than one group, and a plurality of short-circuit check electrodes corresponding to each group may be formed in the blank area of the substrate to check for short circuits. In addition, the method is not limited to dividing the intermediate portion of each signal electrode and then cutting off the blank area of the substrate. There is no problem with that either. Furthermore, it is also possible to employ photoetching as a means of dividing the signal electrode.

〔Effect of the invention〕

As explained above, according to the present invention, the short-circuit check circuit terminals can be easily and efficiently connected to the short-circuit check electrodes by simply bringing the terminals of the short-circuit check circuit into contact with the short-circuit check electrodes formed in advance on the margins on both sides of the substrate. You can check for short circuits between
Then, by simply dividing the intermediate portion of each signal electrode and cutting off the blank portion of the substrate, it is possible to complete the electrode substrate in the two-division multiple matrix method.

[Brief explanation of drawings]

1(a), (b), and (c) are plan views sequentially showing the manufacturing process in an embodiment of the present invention; FIG. 2 is a plan view of an electrode substrate for scanning signals; and FIG. 3 is a plan view of a liquid crystal display. FIG. 3 is a cross-sectional view of a display element. DESCRIPTION OF SYMBOLS 1...Substrate, 1a...Margin part, 2...Signal electrode,
3... Electrode for short circuit check, a... Division line.

Claims (1)

[Claims] A large number of signal electrodes are formed in parallel on the substrate, and electrodes for short-circuit checking are formed in the margins on both sides of the substrate that will be cut off later, and each signal electrode is alternately connected to the ends of the electrodes. are led out to opposite sides and connected to the short circuit check electrode, and one terminal of the short circuit check circuit is brought into contact with one of the short circuit check electrodes, and the other terminal is brought into contact with the other short circuit check electrode. , check whether there is a short circuit between the adjacent signal electrodes, and then divide the middle part of each of the signal electrodes into an electrode group on one side of the substrate and an electrode group on the other side. , and a method for manufacturing an electrode substrate for a two-division multiple matrix type liquid crystal display element, characterized in that each margin portion of the substrate is cut off.