JP2004118135A - Method for manufacturing liquid crystal display device and glass cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize efficient production by eliminating vexatious handling from individually cut out liquid crystal display panels to inspection of lighting. <P>SOLUTION: The method comprises assembling the device with mother glass substrates, then exposing the terminal wire parts necessary for the inspection of lighting and inspecting the lighting in the state of the mother glass substrates. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technology for manufacturing a liquid crystal display device.
[0002]
[Prior art]
As is well known, a liquid crystal display panel is configured by laminating two glass plates via a sealing material and sealing a liquid crystal in the laminated interior.
[0003]
A pattern on which circuit elements are formed is formed on one glass plate, and a color filter pattern is formed on the other glass plate.
[0004]
In manufacturing a liquid crystal display device, generally, a plurality of circuit boards are formed on a single mother glass substrate, and another mother glass plate on which a color filter pattern for a plurality of panels is formed is formed. Are superposed via a sealing material formed for each panel to form a mother glass substrate on which a plurality of liquid crystal display panels are formed.
[0005]
Thereafter, as shown in Patent Literature 1, after a cell cutting process of dividing the mother glass substrate into individual liquid crystal display panels, the liquid crystal display panels are formed into individual liquid crystal display panels. A lighting test is performed to check whether the device operates. When dividing the mother glass substrate into individual liquid crystal display panels, it is necessary to expose terminal lines for operating a liquid crystal display, so that the glass formed by the color filters opposed to the glass substrate on which the terminal lines are formed is formed. Cut the substrate side. Therefore, the glass substrate on which the circuit element is formed is configured to be one size larger than the glass substrate on which the color filter is formed by the terminal wire. In the lighting inspection method, a terminal line for transmitting and receiving a signal of a liquid crystal display is exposed on a glass plate side on which a circuit pattern of an individually taken out liquid crystal display panel is formed, and the terminal line is connected to an inspection device. The probe is touched to send and receive signals to check the normal operation of the liquid crystal display. For this reason, in the lighting inspection, each manufactured liquid crystal display panel is attached to an inspection device and inspected.
[0006]
[Patent Document 1]
JP 2000-231086 A
[Problems to be solved by the invention]
In recent years, demand for liquid crystal display panels has increased, and mother glass substrates have been increased in size in accordance with an increase in production. Accordingly, the number of liquid crystal display panels formed on a mother glass substrate has increased. In particular, with the spread of mobile phones and small liquid crystal display electronic devices, the demand for small and medium sized liquid crystal display panels has increased, and the number of liquid crystal display panels formed on a mother glass substrate has reached several tens. For this reason, the lighting inspection is performed after the individual liquid crystal display panels are cut out from the mother glass substrate. However, since the number of liquid crystal display panels cut out at a time increases, the line configuration up to the lighting inspection is complicated. . As a result, handling up to the lighting inspection becomes frequent, resulting in an increase in the cost of the device leading to the inspection device or an increase in the number of workers, thereby suppressing the cost reduction of the liquid crystal display panel. Alternatively, when the apparatus cost is suppressed, there arises a problem that the throughput of the production line is suppressed and the production amount is not improved.
[0008]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and aims to eliminate the tedious handling from individually cut out liquid crystal display panels to lighting inspection and to provide an efficient production process. Is to do.
[0009]
[Means for Solving the Problems]
One of the typical inventions included in the present application is one in which terminals necessary for a lighting test are exposed in a state of a mother substrate and a lighting test is performed in a state of a mother glass substrate.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a production process of the liquid crystal display panel according to the first embodiment of the present invention. In a liquid crystal display panel, liquid crystal is dropped between a mother glass plate formed by circuit elements and a mother glass plate formed by a color filter, and two glass plates are overlapped and assembled via a sealing material. The assembled substrate is called a mother glass substrate, and the mother glass substrate is composed of a plurality of liquid crystal display panels in order to produce a liquid crystal display panel at low cost or high efficiency. In the conventional production process, after assembling a mother glass substrate, a liquid crystal display panel is individually cut out, and then a lighting inspection is performed. In the present invention, as shown in FIG. 1, after assembling a mother glass substrate composed of a plurality of liquid crystal display panels, a terminal portion exposing step is adopted, and circuit elements are formed on each of the plurality of liquid crystal display panels. The terminal 1 of the glass substrate 3 is exposed. To expose the terminal portion 1, a part of the glass substrate 2 on which the color filter facing the terminal portion 1 is formed is removed, and the terminal portion 1 is exposed. Thereafter, a lighting test is performed on the mother glass substrate with the terminal portions exposed, and a normal operation of each liquid crystal display formed on the mother glass substrate is confirmed. Since the lighting inspection device can recognize the address of each liquid crystal display panel, the lighting inspection device is informed of the liquid crystal display panel in which the failure has occurred in the lighting inspection. After the lighting inspection, the mother glass substrate is put into a repair device, and the liquid crystal display panel requiring repair is repaired. Thereafter, the liquid crystal display panel is divided into individual liquid crystal display panels in a cell cutting step, and after being formed on each liquid crystal display panel, the liquid crystal display panel is put into a mounting step of mounting a semiconductor integrated circuit. For this reason, according to this method, it has become possible to perform inspection and correction at a time in the state of the mother glass substrate. Conventionally, each liquid crystal panel was attached to a lighting inspection device and inspected, and if necessary, the liquid crystal display panel was repaired with a repair device.However, since complicated handling is required, the lighting inspection and the repair process are automated. The consistent line was difficult. Actually, since the liquid crystal display panels taken out vary in size from 2 inch size to 20 inch size, lighting inspection and correction are performed manually. In this method, since the lighting inspection and correction are performed with the configuration of the mother glass substrate, acceptance and delivery of each process become smooth, and handling of loading / unloading becomes easy, so that an automated line is possible. Since the size of the mother glass substrate does not change in each production line, there is no problem by unifying the size of the mother glass substrate in the lighting inspection and the repair process. Each probe connected to the terminal line in the lighting inspection device must correspond to the design of the liquid crystal display panel, but it is possible to connect to each liquid crystal display panel by adjusting the position of each probe in advance. it can. For this reason, a fully automatic integrated line has become possible in a liquid crystal display panel production line.
[0011]
2 and 3 show a method of exposing a terminal portion in the terminal exposing step. FIG. 2 shows a method of exposing a terminal portion using a scribe-break technique used for glass cutting. The terminal portion 1 is formed on a circuit pattern surface of a circuit pattern plate 3 on which a circuit pattern is formed. Therefore, a part of the color filter plate 2 on which the color filter is formed opposite to the circuit pattern plate 3 (the hollow portion 5 for exposing the terminal portion 1) is removed, and the terminal portion 1 is exposed. In the exposure method, scribing is performed along the removal line of the hollow portion 5 of the color filter plate 2 with an abacus-shaped wheel chip 10 or a laser to generate a median crack 6 in the removal line. In general, in scribing using an abacus-shaped wheel tip 10, scribing is performed by controlling the outer diameter and cutting edge angle of the wheel and the load pressing the wheel against the glass substrate. At this time, if scribing is performed under appropriate scribing conditions, a median crack 6 occurs below the removal line, but the crack length of the median crack is about 10 to 20% of the thickness of the glass substrate. Therefore, in order to remove the hollow portion 5, it is necessary to advance the crack tip of the median crack and reach the crack to the glass back surface. For this reason, after scribing, a break process for bending or applying an impact is performed along the line of the median crack 6, and the median crack 6 is penetrated to the back surface of the color filter plate 2. After that, the hollow portion 5 is mechanically removed with a suction plate or the like corresponding to the shape of the hollow portion. In the present embodiment, scribing is performed using a specially processed wheel tip in which a median crack 6 having a thickness of 80 to 90% of the color filter plate 2 occurs, thereby eliminating a break process and adopting a method in which equipment cost is suppressed. The wheel tip 6 has an unevenness of 5 to 20 mm at the tip of the wheel tip, and the unevenness causes a median crack length of 80 to 90% of the thickness of the glass substrate. Since 80 to 90% of the median crack length could be generated by using the wheel tip 6, a method of eliminating the normally necessary break step and removing the hollow portion 5 after scribing was adopted. In order to make it easier to remove the hollow portion 5, the wheel tip is inclined obliquely (1 to 30 °) with respect to the traveling direction, and the crack direction of the median crack 6 is changed to the hollow portion as shown in FIG. 5 inside. When a crack is generated inside the hollow portion 5, the inclinations of the removal lines facing each other are bilaterally symmetric. Therefore, the inclination of the median crack 6 created in the second line is symmetrical to the inclination of the median crack 6 created in the first line, and it is necessary to change the inclination of the wheel tip between the first line and the second line. In order to facilitate the mechanism for tilting the wheel tip, a mechanism was installed to invert the wheel tip with respect to the vertical axis in a tilted state. According to this method, scribing is performed while reciprocating, and the wheel tip is inverted when reciprocating, so scribing is performed while always maintaining the same inclination angle with respect to the traveling direction. According to this method, the cross section of the hollow portion 5 has an inverted trapezoidal shape, the hollow portion 5 is easily removed, and damage due to rubbing hardly occurs.
In the step of removing the hollow portion 5, a method of removing the hollow portion 5 from the end surface of the mother glass substrate so as to easily remove the hollow portion was adopted. The median crack 6 has 80 to 90% of the plate thickness, but 10 to 20% of the plate thickness remains. For this reason, an excessive force is required to collectively remove the hollow portion 5 with the suction plate, and the suction force for suctioning the hollow portion 5 is also increased, so that the equipment is increased in size. In the present embodiment, as a method for removing the hollow portion 5, a mechanism for sucking the suction plate to the end of the hollow portion 5 with a suction force of 0.1 to 0.5 MPa and removing the hollow portion 5 while peeling off the hollow portion 5 sequentially. And the hollow portion 5 was removed.
[0012]
FIG. 3 shows a terminal portion exposing method other than the above. In a process before assembling the mother glass substrate, holes are provided in the color filter plate 2 at positions where the terminal portions 1 are exposed. A mother glass substrate is assembled using the color filter plate 2, and the terminal portion 1 is exposed on the mother glass substrate. The mother glass substrate is transported, and a lighting test is performed.
[0013]
FIG. 4 shows a configuration of a removal pattern of the hollow portion 5. FIGS. 4A and 4B show a pattern configuration by a method in which a blanking removal step is provided between a mother glass substrate assembly step and a lighting inspection. FIG. 2A shows a specification in which the terminal portions 1 are formed from both the longitudinal direction and the lateral direction of the circuit pattern surface. Since the terminal portion is formed from both the longitudinal direction and the lateral direction of the display area, the removal area of the color filter plate is the entire surface other than the display area. FIG. 2B shows a specification in which the terminal portion 1 is formed from one of the longitudinal direction and the lateral direction of the circuit pattern surface. Since the terminal portions 1 are formed only in either the longitudinal direction or the short direction, the area to be removed from the color filter plate 2 is sufficient in the direction where the terminal portions 1 are formed. In addition, there is a cell cutting step for separating individual panels in a step after the lighting inspection / correction. In order to reduce a burden of the cell cutting step, the entire surface other than the display area of the color filter plate 2 is previously exposed in the terminal portion exposing step. Can be removed. FIG. 4C shows a removal pattern configuration of the hollow portion 5 in a method of assembling a mother glass substrate using a color filter plate 2 provided with holes in advance and performing a lighting inspection before the mother glass assembling step. The position of the hole provided in the color filter plate 2 exposes the terminal portion 1 and is set to a size necessary and sufficient for lighting inspection and correction.
[0014]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, troublesome handling from the liquid crystal display panel cut out individually to lighting inspection can be eliminated, and efficient production can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a mother glass substrate according to an embodiment of the present invention. FIG. 2 is a view showing a terminal portion exposing step of an embodiment according to the present invention. FIG. 3 is a mother according to a second embodiment of the present invention. FIG. 4 is a perspective view showing a glass substrate. FIG. 4 is a front view showing a hollow portion of an embodiment according to the present invention.
DESCRIPTION OF SYMBOLS 1 Terminal part 2 Color filter board 3 Circuit pattern board 5 Hollow part 6 Median crack 10 Wheel chip

Claims (9)

A pair of mothers in which a first mother substrate on which a circuit pattern is formed for a plurality of panels and a second mother substrate on which a color filter is formed for a plurality of panels are bonded together in a state where liquid crystal is sealed in each panel region. Forming a substrate;
Separating the pair of mother substrates for each panel, comprising:
A manufacturing method, wherein a lighting inspection is performed before separating the pair of mother substrates for each panel. In claim 1,
A method for manufacturing a liquid crystal display device, comprising exposing a terminal line before performing a lighting test. In claim 2,
Cutting the second mother substrate to expose terminals connected to the circuit pattern,
A method for manufacturing a liquid crystal display device, wherein lighting inspection is performed using the terminal. The method of manufacturing a liquid crystal display device according to claim 1, wherein the cutting of the second mother substrate is performed by inclining a cut surface in a direction of hollowing out. A first substrate on which a circuit pattern is formed, and a second substrate on which a color filter is formed;
A liquid crystal display device wherein a first substrate and a second substrate are attached to each other in a state where liquid crystal is sealed in a panel region,
A liquid crystal display device, characterized in that an end of the second substrate has a taper that becomes narrower outside the first substrate. A glass cutting device that tilts the wheel tip to generate median cracks on the hollow side. In claim 6,
A glass cutting device, comprising: a mechanism for inverting the wheel tip with respect to a vertical axis in a tilted state. A liquid crystal is sealed in each panel area of a first mother board in which a circuit pattern is formed for a plurality of panels and a second mother board in which a color filter is formed for a plurality of panels in a state where liquid crystal is sealed in a panel area. A step of forming a pair of mother substrates bonded in a state,
Separating the pair of mother substrates for each panel, comprising:
A method for manufacturing a liquid crystal display device, comprising: bonding a second substrate having an opening at a position facing a terminal connected to a circuit of the first substrate to the first substrate. A method for manufacturing a liquid crystal display device, comprising: bonding a pair of mother substrates for a plurality of panels, exposing terminals before separation into panels, and performing a lighting test.

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