KR100904259B1 - Processing line of liquid crystal display device and manufacturing method using it - Google Patents

Abstract

The present invention relates to a process line of a liquid crystal display device and a manufacturing method using the same, which can prevent the progress of unnecessary processes by effectively storing and treating a defective liquid crystal unit panel, and minimizing a process line and process time. A process line of a liquid crystal display device having a loader, comprising: a first line for carrying out an alignment process including an alignment film applying process, an alignment film coating, an alignment film firing, an inspection, and rubbing; 2nd line which carries out the gap process including the application | coating, vacuum bonding, and hardening process, and the inspection process including the scribe / break process, the grinding | polishing process, the inspection process of a unit liquid crystal panel, and a final inspection process after the said bonding and hardening process A third single line consisting of a single wire and an unloader of each of the alignment process, the gap process and the inspection process And a buffer catheter for loading or processing the defective panel generated during the process.

Single wire single line, double wire double line, local processing unit, buffer cassette

Description

PROCESSING LINE OF LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD USING IT}

1 is a liquid crystal cell process diagram using a conventional vacuum injection method.

2 is a schematic view showing a method of injecting liquid crystal into a unit panel during a conventional cell process.

3 is an exemplary view for explaining a conventional defective unit substrate region.

4A and 4B are perspective views for explaining the liquid crystal dropping method of the present invention.

5 is a process flow chart for explaining the alignment process according to an embodiment of the present invention.

6 is a process flow diagram of a gap process according to an embodiment of the present invention.

7 is an exemplary view for explaining a defective unit substrate region according to an embodiment of the present invention.

8 is a process layout for explaining the inspection process line according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

300: TFT unit board area 400: Color filter unit board area

500: first substrate 600: second substrate

800: third line 810: loader

900: local processing unit 910: unloader                 

1000: buffer cassette

The present invention relates to a liquid crystal display device, and more particularly, to a process line of a liquid crystal display device capable of simplifying a process line and a method of manufacturing a liquid crystal display device using the same.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, the LCD (Lipuid Crystal Display Device), PDP (Plasma Display Panel), ELD (Electro Luminescent Display), and VFD (Vacuum Fluorescent) Various flat panel display devices such as displays have been studied, and some of them are already used as display devices in various devices.

Among them, liquid crystal displays are the most widely used, replacing the cathode ray tubes for mobile image display devices because of their excellent image quality, light weight, thinness, and low power consumption. In addition to the same mobile type, various developments have been made for television monitors.

Such liquid crystal displays are largely manufactured through an array process, a color filter process, a liquid crystal cell process, and the like.

The array process is a process of forming a thin film transistor (TFT) and a pixel electrode on a first substrate by repeating deposition, photolithography, and etching processes.

In the color filter process, a black matrix is formed on the second substrate to prevent light leakage in regions other than the region where the pixel electrode is formed, and red and green colors are formed using dyes or pigments. After manufacturing a blue color filter, it is a process of forming an indium tin oxide (ITO) film for common electrodes.

The liquid crystal cell process maintains a constant cell gap between the first substrate and the second substrate by using a spacer, bonds both substrates using a seal material, and then cuts the unit panel and injects liquid crystal to complete the liquid crystal cell. It is a process.

Hereinafter, a conventional liquid crystal cell process will be described in detail with reference to the accompanying drawings.

1 is a view showing a liquid crystal cell process using a conventional vacuum injection method.

As can be seen in FIG. 1, first, an alignment material is applied onto a TFT substrate and a color filter substrate, and then an alignment process 1S is performed so that the liquid crystal molecules have uniform orientation. The alignment step (1S) proceeds in order of washing before application of the alignment film, alignment film printing, alignment film firing, alignment film inspection, and rubbing process.

After the alignment process 1S, a gap process proceeds. In the gap process, each of the TFT substrate and the color filter substrate is cleaned (2S), and then a spacer (3S) for maintaining a constant cell gap on the TFT substrate is spread (3S), and the outer portion of the color filter substrate After the seal material is applied (4S) to the TFT, the TFT substrate and the color filter substrate are applied to each other to form a bonding process (5S).

Such a gap process proceeds with a two-line double line process in which the TFT substrate and the color filter substrate each proceed in different lines, and in the bonding process, it proceeds as a single-line single line. In other words, the gap process is a process consisting of a complex line in which the process proceeds in a two-line double line and then the process proceeds to a single-line single line.

After the bonding process, a process of cutting and processing into unit panels is performed (6S).

Thereafter, liquid crystal is injected into the unit panel, and the injection hole is sealed (7S) to form a liquid crystal layer.

After that, the cut surface of each unit panel is polished, and then the liquid crystal display device is manufactured by performing the external panel and electrical defect inspection 8S of the unit panel.

2 is a schematic view showing a method of injecting liquid crystal into a unit panel during the conventional cell process.

As shown in FIG. 2, first, the container 3 containing the liquid crystal material 1 is placed in the chamber 2, and then the inside of the chamber 2 is kept in a vacuum state so as to be in the liquid crystal 1 material or the container 3. Remove moisture from the inner wall and remove bubbles.

Thereafter, after immersing or contacting the unit panels 4 of the several sheets in the container 3, nitrogen (N ₂ ) gas is introduced into the chamber 2 to raise the pressure in the chamber 2 to the atmospheric pressure state. The liquid crystal material 1 is injected into the unit panel 4 by the difference between the pressure in the chamber 4 and the pressure in the chamber 2.

In this case, since the seal material applied for bonding the substrate is patterned on the unit panel 4 to form a liquid crystal injection hole, the liquid crystal material 1 is injected into the unit panel 4 through the injection hole.

 After that, when the liquid crystal 1 is filled in the unit panel 4, the liquid crystal cell is completed by encapsulating the injection hole.

However, this vacuum injection method has the following problems.

First, since the vacuum injection method injects the liquid crystal into the unit panel due to the pressure difference, it takes a long time to inject the liquid crystal and thus there is a problem that productivity is lowered.

Second, in the manufacturing process line of the liquid crystal display device using the conventional vacuum injection method, the cutting process 6S, the injection encapsulation process 7S, and the inspection process 8S are each performed in separate independent lines. In other words, the cutting process (6S), the injection encapsulation process (7S) and the inspection process (8S) is carried out in a triple line divided into three process lines, it can include as many logistics equipment, each process line. Space should be secured, and the production time is increased due to the long process time that is produced through each process.

Third, the TFT substrate and the color filter substrate have a plurality of unit cells formed on a glass substrate having a large area facing each other.

Therefore, as illustrated in FIG. 3, a plurality of unit cells are formed on the first substrate 100 and the second substrate 200. The first and second substrates 100 and 200 may include at least one No Good unit substrate region in the array process and the color filter process as described above.

When the first substrate 100 and the second substrate 200 having such a large area are bonded together, and a plurality of unit panels are formed through a cutting process, the unit substrate region has been judged good (abbreviated as "G"). The liquid crystal unit panel formed of the present invention may be commercialized, but the liquid crystal unit panel including at least one unit substrate region that has been judged as defective (NG) cannot be commercialized.

However, such a defective (NG) liquid crystal unit panel has a problem in that the polishing, cleaning, and inspection processes are performed in the same manner as the good (G) liquid crystal unit panel, so that unnecessary economic processes are additionally added.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of manufacturing a liquid crystal display device having improved productivity by forming a liquid crystal layer within a short time.

Another object of the present invention is to provide a process line of a liquid crystal display device and a method of manufacturing the liquid crystal display device capable of effectively storing and treating a defective liquid crystal unit panel to prevent an unnecessary process.

It is still another object of the present invention to provide a process line of a liquid crystal display device and a method of manufacturing a liquid crystal display device which can minimize a process line and a process time.

Process line of the liquid crystal display device and a manufacturing method using the same of the present invention for achieving the above object, in the process line of the liquid crystal display device having a loader and an unloader, cleaning before the alignment film is applied to the first substrate and the second substrate The first line undergoing an alignment process including a step, an alignment film coating, an alignment film firing, an inspection, and rubbing, the first and second substrates, the rubbing after cleaning, liquid crystal dropping, sealing material coating, vacuum bonding, and the like. A second line for performing a gap process including a curing process, a scribe / break process, a polishing process, an inspection process for a unit liquid crystal panel, and a final inspection process for the first substrate and the second substrate bonded after the gap process. Single single line performing the inspection process including a single third line, the first line through the alignment process, the second line through the gap process For buffers that are placed in the unloader of each process line of the third line for performing the inspection process, and which loads or processes the defective substrate and the defective panel generated during the process on the first line, the second line and the third line. It comprises a cassette.

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In addition, according to another aspect of the present invention, the step of performing an alignment process including the cleaning process, the alignment film coating, alignment film firing, inspection and rubbing before applying the alignment film to the first substrate and the second substrate in the first line, and Loading the defective substrates generated in the alignment process into a first buffer cassette provided on the side of the first line unloader, and cleaning and liquid crystal dropping in the second line with respect to the first substrate and the second substrate after the rubbing. And forming a large area panel in which the first substrate and the second substrate are bonded by performing a gap process including applying a sealant, vacuum bonding, and curing. Storing in a second buffer cassette located in the second line unloader, and including a plurality of unit panel regions, wherein the plurality of unit panel regions are defective. Loading the large area panel with the identified information of the unit panel area and the good quality unit panel area on a third line, and cutting the large area panel in the scribe / break process on the third line to cut a plurality of unit panels. Forming and storing the unit panel including the defective unit panel region in a third buffer cassette in an inspection process of the unit panel in the third line; And polishing the surface by the polishing process in the third line and inspecting the appearance and electrical failure of the good unit panel in the final inspection process in the third line.

Such a manufacturing process line and manufacturing method of the liquid crystal display according to the present invention are based on the liquid crystal dropping method, and will be described with reference to FIGS. 4A and 4B.

First, as shown in FIG. 4A, a UV-curable seal material 30 having a frame shape without a liquid crystal injection hole is coated on the TFT substrate 10 to a predetermined thickness, and the inside of the seal material 30 (thin film transistor). An appropriate amount of liquid crystal 20 is evenly added to the array portion. In this case, the liquid crystal 20 is uniformly doted by a predetermined amount with a constant pitch and pattern using a syringe (Syringe, 60).

Next, as shown in FIG. 4B, the color filter substrate 50 is placed on the TFT substrate 10 on which the seal member 30 is printed in a vacuum chamber (not shown), and then bonded.

Then, although not shown in the drawing, when the inside of the vacuum chamber is restored to atmospheric pressure, the bonded TFT substrate 10 and the color filter substrate 50 are pressed by the substrate due to the pressure difference between the chamber and the substrate. ) And the color filter substrate 50 to form a liquid crystal layer. Then, the liquid crystal display device is manufactured by curing the seal material 30 by irradiating the application area of the seal material 30 while moving a UV light source.

Since the liquid crystal dropping method directly drops the liquid crystal onto the substrate for a short time, not only can the liquid crystal layer formation of a large area liquid crystal display device proceed very quickly, but also only the required amount of liquid crystal is directly dropped onto the substrate. Since it is possible to minimize the consumption of the liquid crystal display device has the advantage that can significantly reduce the manufacturing cost.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 is a process flow chart for explaining an alignment process according to an embodiment of the present invention, Figure 6 is a process flow chart of a gap process according to an embodiment of the present invention, Figure 7 is a defective unit substrate according to an embodiment of the present invention 8 is an exemplary diagram for describing an area, and FIG. 8 is a process arrangement diagram for describing a third line according to an exemplary embodiment of the present invention.                     

First, although not shown, a first substrate and a second substrate on which an array process and a color filter process are performed are provided. The first substrate and the second substrate include a plurality of first unit substrates (called "TFT unit substrates") and a second unit substrate (referred to as "color filter unit substrates"), respectively, the array process and When the color filter process is completed, it is loaded in the first cassette and the second cassette, respectively.

The first cassette and the second cassette are mounted to the loader of the liquid crystal cell processing line by a transfer device. Here, the TFT unit substrate region includes a plurality of gate lines arranged in one direction at a predetermined interval by the array process, and a plurality of data lines and gate lines arranged at regular intervals in a direction perpendicular to the gate lines. And a plurality of thin film transistors and pixel electrodes respectively formed in a matrix pixel area defined by a data line.

The color filter unit substrate region includes a black matrix layer for blocking light except for the pixel region, a color filter layer composed of three primary colors, and a common electrode for driving a liquid crystal together with the pixel electrode. have.

The manufacturing process of the liquid crystal cell process under the above conditions is as follows.

The line for proceeding the liquid crystal cell process is carried out by three process lines each having a loader and an unloader. That is, it consists of the 1st-3rd line which advances an orientation process, a gap process, and an inspection process, respectively.

The alignment process includes washing before applying the alignment film, alignment film printing, firing, inspection, and rubbing processes, and the gap process includes washing after rubbing, liquid crystal dropping, sealing material coating, vacuum bonding, and curing processes. The process consists of a scribe / break process, a polishing process, and an inspection process of a unit liquid crystal panel.

First, the first and second cassettes for loading the first substrate and the second substrate, respectively, are placed in the loader of the first line that performs the alignment process when entering the liquid crystal cell process.

Next, a first substrate loaded in the first cassette and a second substrate matching the first substrate are selected by a robot arm that recognizes information of the first and second cassettes mounted on the loader. Load into the alignment process line.

As shown in FIG. 4, the alignment process proceeds in the order of cleaning before the alignment film (20S), followed by the alignment film application (21S), the alignment film firing (22S), the inspection (23S), and the rubbing (24S).

Briefly, this is followed by a cleaning (20S) process for removing foreign matter and particles to the first substrate and the second substrate, and then the alignment film is applied (21S).

The alignment liquid of the alignment film coating 21S is supplied dropwise between the doctor roll and the anilox roll rotating in the dispenser. This coating liquid is held as a liquid thin film on the surface of the anilox roll between the two rolls, and transferred from the anilox roll to a printing roll with a printing rubber plate. And when the board | substrate fixed on the application | coating stage progresses, the thin film of this coating liquid is apply | coated to a 1st board | substrate and a 2nd board | substrate.                     

Next, a baking process 22S for evaporating the solvent in the alignment film printed on the first substrate and the second substrate is performed, and the alignment process is performed through the inspection of the alignment film state 23S and the rubbing process 24S. To complete.

When the alignment process is completed, the first substrate and the second substrate are loaded in the third and fourth cassettes provided in the unloader, respectively, and the substrates in which the defects occur during the alignment process, such as orientation defects, rubbing defects, and The defective substrate generated due to other causes is loaded into the buffer cassette provided on the side of the unloader.

Next, the third and fourth cassettes are loaded into a loader of a second line which undergoes a gap process. The second line is divided into a first gap process line for processing the first substrate, a second gap process line for processing the second substrate, and a bonding line for bonding the both substrates. That is, the process of the two-line double line proceeding in different lines on the first substrate including the TFT unit substrate regions and the second substrate including the color filter unit substrate regions, and then the first substrate and the second substrate The gap process of the single-wire single line which bonds a board | substrate is performed. In other words, the gap process is a process consisting of a composite line that proceeds in a two-line double line and then proceeds to a single-line single line.

The procedure of this gap process is as follows.

As shown in FIG. 6, one of the first and second substrates loaded in the third and fourth cassettes is selected and loaded into the second line.

Next, the selected first and second substrates are cleaned 25S, and then the first substrate is loaded into an LC dispensing apparatus, and the second substrate is sealed with an silver dispensing apparatus. (Seal) Loaded sequentially into the dispensing device.

Thereby, silver (Ag) dot shape is apply | coated 26S on a 2nd board | substrate, and the seal material without a liquid crystal injection hole is apply | coated to the periphery of each color filter unit board | substrate area | region (27S). At this time, the sealing material is light or thermosetting resin.

Meanwhile, a process of dropping 28S the liquid crystal onto the TFT unit substrate region corresponding to the seal material inner region on the color filter unit substrate region is performed.

Briefly looking at the dropping process 28S of the liquid crystal proceeds as follows.

First, after degassing a liquid crystal under vacuum, a liquid crystal dropping apparatus is assembled and set, and it mounts in a liquid crystal dispensing apparatus. Then, when the first substrate is loaded into the liquid crystal dispensing apparatus, the liquid crystal is dropped using the liquid crystal dropping apparatus.

Next, each of the first and second substrates subjected to the above process is loaded into a vacuum chamber, and the first substrate and the second substrate are bonded to each other so that the loaded liquid crystal is uniformly filled in each panel. Curing to form a large area panel (30S).

Here, looking at the bonding process proceeds as follows.

Although not shown in the figure, the first substrate is mounted on a table in a vacuum container that is movable in the horizontal direction, and the entire lower surface of the first substrate is vacuum-adsorbed by the first adsorption mechanism to fix it. Next, the entire lower surface of the second substrate is vacuum-adsorbed with the second adsorption mechanism, and the vacuum chamber is closed to vacuum. Then, the second adsorption mechanism is lowered in the vertical direction so as to space the first substrate and the second substrate at a predetermined interval, and the table on which the first substrate is mounted is moved in the horizontal direction so that the first substrate and the second substrate are moved. Position the substrate.

Then, the second adsorption mechanism is lowered in a vertical direction to bond the second substrate to the first substrate through the seal material, and the dropping liquid crystal is pressed to fill the first substrate and the second substrate to a predetermined thickness. A large area panel is formed that includes a plurality of unit panels. Subsequently, the panel is removed from the vacuum chamber, and the seal material is irradiated with ultraviolet rays to complete the gap process.

In this case, the panel in which the defect due to misalignment during the gap process, the defect due to the lack and excessive liquid crystal amount or the defect due to the disconnection of the seal material is used for the buffer located in the unloader of the gap process line. It is stored in a cassette.

The large area panel includes a plurality of unit panel regions in which a TFT unit substrate region and a color filter unit substrate region are bonded to each other. For example, as illustrated in FIG. 7, nine TFT unit substrate regions 300 and color filter unit substrate regions 400 are formed on the first substrate 500 and the second substrate 600, respectively. The first and second substrates 500 and 600 undergo a liquid crystal cell process after being judged as good quality (G). As described above, a TFT unit in which at least one defect (NG) is generated in the array process and the color filter process. The substrate region or the color filter unit substrate region may be included.

The information on the unit substrate area where the defect (NG) has occurred is stored in a central processing unit that oversees the information of the process line of the liquid crystal display device. Local) is sent to the processing unit.

On the other hand, the large area panel where the gap process is completed is loaded on the third line. The third line includes a disconnection process including a process of cutting a large area panel into a plurality of liquid crystal unit panels, a polishing process of processing the cut surface of the liquid crystal unit panel, and an appearance and electrical defect inspection of the liquid crystal unit panel. It consists of a single line.

That is, as shown in FIG. 8, when a cassette (not shown) on which a plurality of panels are loaded is first disposed on a loader 810 of the third line 800, the panel is united by a robot arm. The process of cutting into panels is carried out.

The cutting process (30S) is in close contact with the panel of the glass material at a constant pressure through a cutting wheel (Wheel) to form a groove of a certain depth, after the groove is formed in the panel cracks (Crack) through an external impact A plurality of unit panels are formed by cutting the panel to propagate downward.

Next, the process of inspecting the state of the cutting | disconnection site | part of a unit panel is advanced. The inspection step 31S is a step of inspecting whether residues of burrs remain in the cut portions of the cut unit panels.

Subsequently, each cut unit panel is transferred to a polishing apparatus to polish the surface of the unit panel 32S. In this embodiment of the present invention, before the polishing process 32S, the local processing unit 900 performs the central processing. Data of the defective unit substrate region is received from the apparatus, and it is determined whether the unit panel is transferred to the polishing apparatus.

That is, the unit panel including the unit board area in which the defect has occurred is stored in the buffer cassette 1000 located at the periphery of the third line 800, and the unit board area which has been judged good quality (G) in FIG. Only the liquid crystal unit panel consisting of the transfer to the polishing apparatus. As a result, wear and tear due to unnecessary operation of the conventional polishing equipment, worker fatigue and time waste in an inspection process which can be carried out can be effectively reduced.

Next, the final inspection 33S of the appearance and electrical connection of the liquid crystal unit panel is performed to complete the liquid crystal cell process, and then loaded in the cassette provided in the unloader 910.

The inspection 33S is a process of inspecting the appearance and A / P (Auto / Probe) inspection of the liquid crystal alignment state, such as stains and electrical lighting conditions, for example checkerboard stains, black stains, color filter projections, diagonal lines Check for spots, rubbing streaks, pin holes, gate lines and data lines. The spot defect can be automatically detected by the naked eye or by a solid-state image sensor such as a CCD.

The third line 800 described above is a single-wire single line, unlike a process of cutting, injecting, and inspecting each of three independent lines in the manufacturing process line of the liquid crystal display device using the conventional vacuum injection method. Line can complete the liquid crystal cell process. That is, inefficient space use, process time, and production cost due to a plurality of conventional process lines can be reduced, so that maximum yield can be secured with a minimum process line.

Subsequently, although not shown in the figure, a module process for attaching a driver IC, attaching a backlight, or the like proceeds.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The above-described process line of the liquid crystal display device of the present invention and a manufacturing method using the same have the following effects.

First, by forming a liquid crystal unit panel using the liquid crystal cell process line as a simplified process line of the first to third lines, space can be saved by preventing inefficient space utilization caused by a plurality of conventional process lines.

Second, it is possible to reduce the logistics equipment time and time due to the simplified process line, it is possible to secure the maximum yield with a minimum process line.

Third, a separate buffer cassette is provided on the third line to store and process the unit panel including the defective unit board area by the information of the local processing apparatus, thereby reducing wear and tear caused by unnecessary operation of the polishing equipment in the subsequent polishing process. This can effectively reduce worker fatigue and waste of time in the final inspection process.

Claims (19)

In the process line of the liquid crystal display device having a loader and an unloader, A first line for carrying out an alignment process including a cleaning process, alignment film coating, alignment film firing, inspection, and rubbing before applying the alignment film to the first substrate and the second substrate, A second line for performing a gap process including said post-rubbing cleaning, liquid crystal dropping, sealing material coating, vacuum bonding and curing process for said first substrate and said second substrate; After the gap process, a single-line single third line which performs an inspection process including a scribe / break process, a polishing process, an inspection process of a unit liquid crystal panel, and a final inspection process is performed on the first and second substrates bonded together after the gap process. Including, The third line includes a cutting device for forming a large area panel having a plurality of unit panel areas into a plurality of unit panels; A polishing apparatus for polishing a section of a unit panel having information of a good unit panel region; Including the inspection device for performing the appearance and electrical failure inspection of the polished unit panel, Located in the unloader of each process line of the first line, the second line and the third line to load or process a defective substrate generated during the process on the first line and the second line, and on the third line And a buffer cassette for storing and processing the unit panel having information of the defective unit panel region among the cut unit panels. delete The method of claim 1, Wherein the unit panel region is a panel region in which liquid crystal is dropped on the first unit substrate region and is bonded to the second unit substrate region through a seal material. The method of claim 3, wherein And wherein the defective unit panel region is a panel in which any one of the first unit substrate region and the second unit substrate region is defective and bonded together. The method of claim 4, wherein Wherein the defective unit panel region comprises a first unit substrate region or a second unit substrate region where defects occur in an array process and a color filter process. The method of claim 1, The apparatus further includes a local processing device that receives data from a central processing unit having information on a plurality of unit panel areas formed in the large area panel and stores the unit panel including the defective unit panel area in the buffer cassette. Process line of the liquid crystal display device characterized in that consisting of. The method of claim 1, And a inspection apparatus for inspecting protrusions of cut portions of the unit panel cut by the cutting apparatus. delete delete delete delete delete delete Performing an alignment process on the first substrate and the second substrate in a first line, including a cleaning process before coating the alignment film, applying the alignment film, baking the alignment film, inspecting and rubbing; Loading the defective substrates generated in the alignment process into a first buffer cassette provided on the first line unloader side; After the rubbing, the first substrate and the second substrate may be subjected to a gap process including washing, liquid crystal dropping, sealant coating, vacuum bonding, and curing in a second line on the first substrate and the second substrate. Forming a large bonded panel; Storing the defective substrate and the defective panel generated during the gap process in a second buffer cassette located in the second line unloader; Loading the large area panel including a plurality of unit panel regions, the large area panel having identified information of a defective unit panel region and a good unit panel region of the plurality of unit panel regions, on a third line; Cutting the large area panel in a scribe / break process on the third line to form a plurality of unit panels; Storing the unit panel including the defective unit panel area in a third buffer cassette in an inspection process of the unit panel in the third line; Polishing a surface of the unit panel including the good unit panel region by a polishing process on the third line; And In the third line, the final inspection process includes the step of performing the appearance and electrical failure inspection of the good unit panel, The step of storing the large area panel in the second buffer cassette and the step of storing the unit panel in the third buffer cassette are performed by a central processing unit having information on the plurality of unit panel areas. And a local processing device which receives data and controls the large area panel or the unit panel including the defective unit panel area to be stored in the second or third buffer cassette. Manufacturing method. The method of claim 14, The liquid crystal display is characterized in that the unit panel region is a panel region in which liquid crystal is dropped on the first unit substrate region formed on the first substrate, and is bonded to the second unit substrate region formed on the second substrate through a sealing material. Method of manufacturing the device. The method of claim 14, The defective unit panel region may be a panel in which any one of the first unit substrate region formed on the first substrate and the second unit substrate region formed on the second substrate is bonded to the defective unit panel. Manufacturing method. The method of claim 16, And wherein the defective unit panel region includes the first unit substrate region or the second unit substrate region where defects occur in an array process and a color filter process. delete The method of claim 14, And inspecting the projection of the cut portion of the unit panel.

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