KR20070060810A - Method for manufacturing liquid crystal display panel - Google Patents

Abstract

A method for manufacturing an LCD(Liquid Crystal Display) panel is provided to prevent generation of fine scratches and cracks on a substrate surface and enhance strength of a substrate by attaching protective films outside a first surface and a second substrate that are bonded, and then performing a liquid crystal injection process. A first substrate(10) including a thin film pattern and a second substrate(20) are bonded together. Protective films(40,50) are attached to outer surfaces of the two bonded substrates. Liquid crystals are injected between the two substrates. An injection hole through which the liquid crystals have been injected is sealed. The protective films are removed. The protective films are formed of a polyethylene material. In bonding the first substrate including the thin film pattern and the second substrate, the first substrate includes a thin film transistor, a gate line, a data line and a pixel electrode, the second substrate includes a black matrix layer, a color filter layer and a common electrode, and the first substrate and the second substrate are bonded by using a sealant(30).

Description

Method for manufacturing liquid crystal display panel {Method for manufacturing liquid crystal display panel}

1 is a flowchart for explaining a general liquid crystal cell process.

2 is a flowchart illustrating a conventional liquid crystal injection process.

3 is a flowchart illustrating a liquid crystal injection process according to the present invention.

4A to 4F are views for explaining a manufacturing process of the liquid crystal display panel according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: first substrate 20: second substrate

30: sealant 35: liquid crystal injection hole

40, 50: protective film 60: internal space

70: liquid crystal 80: polarizing plate

The present invention relates to a method for manufacturing a liquid crystal display panel, and more particularly, to a method for manufacturing a liquid crystal display panel which can prevent damage to a substrate constituting the liquid crystal display panel and improve strength.

Liquid crystal display devices (LCDs) have advantages of small size, light weight, and large screen compared to conventional display devices, such as cathode ray tubes (CRTs), and their development is being actively conducted. In particular, the liquid crystal display device has been developed to perform a sufficient role as a flat panel display device, and is used not only as a liquid crystal for mobile phones, PDAs, digital cameras, camcorders, but also for monitors and large display devices of desktop computers. Its scope of use is expanding rapidly. In addition, in order to use a liquid crystal display panel in various parts as a general screen display device, it is a matter of how high quality images such as high definition, high brightness, and large area can be realized while maintaining the characteristics of light weight and thin low power consumption.

In such a liquid crystal display panel, two substrates each having electrodes formed thereon are disposed so that the two electrodes face each other, a liquid crystal material generating a phase transition is injected between the two substrates, and then an electric field is applied between the two electrodes to form liquid crystal molecules. It is a device that displays an image by changing the transmittance of light by moving them. This uses the optical anisotropy and polarization of the liquid crystal. Since the liquid crystal is thin and long in structure, when the electric field is artificially applied to the liquid crystal molecules having directionality and polarity in the molecular arrangement, the direction of the molecular arrangement can be controlled. Accordingly, if the alignment direction is arbitrarily adjusted, light can be transmitted or blocked according to the alignment direction of the liquid crystal molecules by optical anisotropy of the liquid crystal, thereby expressing color and image.

The liquid crystal display panel is largely manufactured through an array process, a color filter process, a liquid crystal cell process, and a module process.

The liquid crystal cell process will be described in more detail as follows.

1 is a flowchart illustrating a general liquid crystal cell process.

Referring to FIG. 1, first and second substrates are prepared, and each of them is mounted in a cassette (S1).

Here, a plurality of liquid crystal display panels are designed on the first substrate and the second substrate, and a plurality of gate lines arranged in one direction with a predetermined interval on the first substrate corresponding to each panel and the A plurality of thin film transistors and pixel electrodes respectively formed in a plurality of data lines arranged at regular intervals in a direction perpendicular to each gate line and in a matrix pixel region defined by the gate lines and the data lines. Are formed. In addition, a black matrix layer, a color filter layer, a common electrode, and the like are formed on the second substrate corresponding to each panel to block light in portions except the pixel region.

Next, after the alignment materials are applied onto the first and second substrates described above, an alignment process is performed such that the liquid crystal molecules have uniform orientation (S2).

The alignment process 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, each of the first and second substrates is cleaned, and then a spacer for maintaining a constant cell gap is spread on the first substrate, and liquid crystals are formed on the outer periphery of each panel of the second substrate. After applying a seal material having an injection hole, the first substrate and the second substrate are pressed at a high temperature to be bonded (S3).

Through such bonding, a plurality of liquid crystal panels having a predetermined gap between the first substrate and the second substrate are manufactured. At this time, the liquid crystal panel includes a liquid crystal injection hole to which the sealing material is not applied. Thereafter, the bonded liquid crystal patterns are cut and separated by unit panels. Next, the liquid crystal is injected through the liquid crystal injection hole of each unit liquid crystal panel processed as described above (S4).

After the liquid crystal injection, the liquid crystal injection hole is sealed, the cut surface of each unit liquid crystal panel is polished, and the appearance and electrical defect inspection (S5) is performed. In addition, a polarizing plate is attached to the outside of the first substrate and the second substrate (S6) to produce a liquid crystal display panel.

In such a liquid crystal cell process, the liquid crystal injection process after the conventional bonding of the two substrates in detail as follows.

2 is a flowchart illustrating a conventional liquid crystal injection process.

First, as mentioned above, the first substrate and the second substrate are bonded to each other by pressing at a high temperature. Next, the liquid crystal panel in which the plurality of liquid crystal panel regions are defined is first cut (S20) to form an array type liquid crystal panel in which a plurality of unit liquid crystal cells are arranged in a line. Liquid crystal is injected through the liquid crystal injection hole of each unit liquid crystal panel (S30). After the liquid crystal injection, the liquid crystal injection hole is sealed (end-seal) using a finishing sealing agent such as an ultraviolet curable resin (S40). After sealing the liquid crystal inlet, knife cleaning is performed to remove the remaining sealing agent around the liquid crystal inlet (S50). Subsequently, the cleaning process (S60) is performed to remove foreign substances on the surface of the liquid crystal panel, and second cut (S70) of the array-type liquid crystal panel in which a plurality of unit liquid crystal cells are arranged, and image defect inspection (S80) of the liquid crystal cell is performed. After that, the unit liquid crystal cell is formed by attaching the polarizing plate (S90) to the outside.

During the liquid crystal injection process, since the outer surfaces of the bonded first and second substrates are exposed as they are without any protection, there is a problem in that dust and foreign substances are attached. In addition, glass-chip powder or the like of the substrate, which may occur during the cutting process, may be adsorbed on the outer surface of the substrate to cause scratches. In addition, since the outer surface of the substrate is in direct contact with the jig of the device during the process, it is possible to generate fine scratches and cracks on the surface of the substrate. If there is foreign matter and scratches on the surface of the liquid crystal cell, light is shielded or polarized by foreign matter and scratches on the surface, and thus the display performance cannot be exhibited at the design stage.

Furthermore, since the cutting, the liquid crystal injection process, and the liquid crystal injection hole sealing process proceed with the pressurization of the first substrate and the second substrate, scratches and cracks can easily be generated on the surface of the substrate, thereby lowering the strength of the substrate, There is a problem that causes appearance and electrical failure.

The present invention is to solve the above problems, by attaching a protective film on the outside of the bonded first substrate and the second substrate and proceeding the liquid crystal injection process, to prevent exposure to the atmosphere and the substrate of the substrate on the jig An object of the present invention is to provide a method for manufacturing a liquid crystal display panel which can prevent direct contact to prevent fine scratches and cracks on the surface of the substrate and improve the strength of the substrate.

In order to achieve the above object, the present invention provides a method of manufacturing a liquid crystal display panel, comprising: bonding a first substrate and a second substrate on which a thin film pattern is formed, and attaching a protective film to outer surfaces of the two bonded substrates. A method of manufacturing a liquid crystal display panel comprising the steps of injecting a liquid crystal between the two substrates, sealing an injection hole injecting the liquid crystal, and removing the protective film.

The protective film may be a film made of polyethylene.

The bonding of the first substrate and the second substrate on which the thin film pattern is formed may include preparing the first substrate including a thin film transistor, a gate line, a data line, and a pixel electrode, a black matrix layer, a color filter layer, and a common electrode. Preparing a second substrate comprising a; and bonding the first substrate and the second substrate using a sealant. Here, the bonding of the first substrate and the second substrate using a sealant may include a sealant including a liquid crystal injection hole for injecting the liquid crystal around an edge of a unit liquid crystal cell on any one of the substrates. Forming a pattern and curing the sealant by hot pressing the two substrates. The sealant is characterized in that it comprises a thermosetting resin or a photocurable resin.

The present invention is characterized in that it further comprises a cutting step for separating into a unit liquid crystal cell and a quality inspection step of the unit liquid crystal cell after the step of injecting the liquid crystal. The cutting may include cutting the first substrate and the second substrate, and removing the protective film attached to any one of the substrates. The quality inspection of the unit liquid crystal cell may include a substrate having a protective film. And contacting the jig with the jig, and removing the protective film may include removing a protective film attached to the substrate.

After removing the protective film, the method may further include attaching a polarizing plate to outer surfaces of the first substrate and the second substrate, and after attaching the polarizing plate, performing a cleaning process. It may further include.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, embodiment of this invention is described in detail.

3 is a flowchart of a method of manufacturing a liquid crystal display panel according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process of manufacturing a unit liquid crystal cell by incorporating a first substrate and a second substrate, and then injecting a liquid crystal into a sealing pattern formed at an edge between them.

A TFT substrate on which a TFT pattern is formed is used as the first substrate, and a color filter substrate on which a color filter is formed is used as the second substrate. That is, the plurality of gate lines arranged in one direction at regular intervals on the first substrate, the plurality of source lines arranged at regular intervals in a direction perpendicular to the gate lines, and the gate lines and the source lines intersect each other. A plurality of pixel electrodes formed in a matrix form in a defined pixel area and a plurality of thin film transistors that are switched by the gate line signal to transfer a source line signal to each pixel electrode are formed. The thin film transistor includes a gate electrode, a gate insulating film, an active layer and an ohmic contact layer, a source electrode and a drain electrode. And a protective layer for insulating between the thin film transistor and the pixel electrode. In addition, a black matrix layer for blocking light of portions other than the pixel region on the second substrate, an R, G, B color filter layer for expressing color color, an overcoat layer for protecting the color filter layer, A common electrode for forming an image is formed.

The first substrate and the second substrate are bonded to each other using a sealant (S100) to form a liquid crystal panel in which a plurality of liquid crystal panel regions are defined. That is, sealants are formed at the pattern edges of the first substrate and / or the second substrate on which the pattern is formed, and then the two substrates are bonded to each other so that the patterns on the first and second substrates face each other. At this time, it is preferable that a sealant uses a thermosetting resin film or a photocurable resin film. That is, the first substrate and the second substrate coated with the sealant are aligned and aligned, and then the two substrates are hot-pressed to cure the sealant to bond the upper substrate and the lower substrate.

A thin and transparent protective film is attached to the outside of the bonded first substrate and the second substrate (S200). That is, a protective film is affixed on the outer surface opposite to the opposing surface of a 1st board | substrate and a 2nd board | substrate. A first protective film is attached to the outer surface of the first substrate, and a second protective film is attached to the outer surface of the second substrate.

As the protective film, a polyethylene (PE) film, a low density polyester (LDPE) film, or a polyethylene terephthalate resin (PET) may be used. In this embodiment, a film made of polyethylene Use

The protective film itself contains a predetermined pressure-sensitive adhesive, it is preferable that there is no damage to the surface during peeling. By using such an easy to attach and remove film, it is possible to protect the outer surface of the first substrate and the second substrate through a simple and simple process. In addition, since a predetermined pressure-sensitive adhesive is contained in the protective film itself, it can be easily attached on the surfaces of the first and second substrates and can be brought into uniform adhesion.

In order to more stably attach the protective film and the first and second substrates, an adhesive may be formed and attached at a predetermined position of the edge of the protective film. Alternatively, one side of the protective film may further include an adhesive tape.

The protective film prevents exposure of the outer surfaces of the first substrate and the second substrate during the process, and prevents contaminants from flowing in, and also the outer surfaces of the first substrate and the second substrate on the jig of the apparatus. Since it is not in direct contact, the occurrence of scratches or cracks on the surface can be prevented. In addition, by using a film that is easy to attach and remove, there is an effect that can prevent the contamination and scratches of the substrate and improve the strength of the substrate through a simple and simple process.

Next, the liquid crystal panel in which the plurality of liquid crystal panel regions are defined is first cut (S300) to form an array type liquid crystal panel in which a plurality of unit liquid crystal cells are arranged in a line. The cutting process is a scribing process of forming a cutting schedule line on a glass surface with a diamond pen having a hardness higher than that of glass, and a break process of applying a force to cut. At this time, the liquid crystal panel of the present invention does not directly contact the outer surface of the substrate by the protective film on the jig of the cutting device, it is possible to prevent the occurrence of scratches and cracks. In addition, since the outer surface of the substrate is protected by the protective film, glass-chips of the substrate generated during the cutting process may be adsorbed onto the substrate surface, thereby preventing the phenomenon of scratching.

The cutting process and the attaching process of the protective film are not limited to the above, and the order can be changed, that is, after the primary cutting (S300) to form an array type liquid crystal panel in which a plurality of unit liquid crystal cells are arranged in a line, A protective film may be attached to the outside of each array type liquid crystal panel (S200).

Thereafter, a process of injecting liquid crystal into the unit liquid crystal cell is performed (S400). The unit liquid crystal cell may include a liquid crystal injection hole for liquid crystal injection, and the liquid crystal may be injected into the liquid crystal panel using a capillary phenomenon and an air pressure difference after vacuuming the inner space of the liquid crystal panel. To this end, a container containing a liquid crystal material is first placed in a chamber, and then the inside of the chamber is kept in a vacuum state to remove moisture and bubbles in the liquid crystal material or on the inner wall of the container. Thereafter, after the liquid crystal injection holes of the plurality of unit liquid crystal cells are immersed in or contacted with the container, when nitrogen (N ₂ ) gas is introduced into the chamber to raise the pressure in the chamber to an atmospheric pressure state, the pressure in the unit liquid crystal cell and the chamber are increased. The liquid crystal material is injected into the unit liquid crystal cell through the liquid crystal injection hole by the difference between the pressures in the liquid crystal material.

At this time, in order to prevent damage to the protective film, no additional heating is performed at the time of liquid crystal injection.

When the liquid crystal injection is completed, a pressurization and encapsulation process (end-seal) for sealing the liquid crystal injection hole into which the liquid crystal is injected is performed so that the liquid crystal does not flow out (S500). Sealing is performed by dispensing the ultraviolet curable resin in the form of a cylinder or passing the liquid crystal inlet in a roll type.

Conventionally, a separate protective paper is used to prevent damage to the outer surface of the liquid crystal panel during the sealing process of the liquid crystal injection hole. However, the present invention does not require a protective paper because the protective film is already attached to the outside of the liquid crystal panel. Do not. In addition, in the prior art, the knife cleaning was performed after the sealing process to remove the liquid crystal flowing out of the liquid crystal panel when the liquid crystal was injected, but the present invention flowed out by removing the protective film attached to the outside of the liquid crystal panel later. Since the liquid crystal can be removed at the same time, the knife cleaning process can be omitted. Thus, the present invention can be expected to reduce the process time and material costs thereby.

Thereafter, a secondary cutting process for separating the array type liquid crystal panel into each unit liquid crystal cell is performed (S600). At this time, the cutting process is composed of a scribing process for forming a cutting schedule line on the surface of the first and second substrate, and a brake process for propagating cracks along the cutting schedule line, one side after the cutting Remove the protective film.

Subsequently, a driving signal is applied to gates, data, and common electrodes positioned at the periphery of the panel to inspect the electro-optical operating characteristics (S700) to select a good panel. At this time, the substrate with the protective film is in contact with the jig, the image defect is detected through the substrate from which the protective film is removed, and after the inspection, the remaining protective film attached to the substrate is removed. That is, after the protective film attached to any one substrate for observing pixel defects during inspection is first removed, the other substrate with the protective film is contacted with the jig for inspection and the protective film attached to the substrate is removed. Thus, the first and second substrates can be protected as effectively as possible, and scratches and cracks on the substrates can be prevented.

For example, first, the first substrate on which the first protective film is attached is cut. And a 2nd protective film is removed and a 2nd board | substrate is cut | disconnected. Or after cutting a 2nd board | substrate, you may remove a 2nd protective film. At this time, since the first protective film is attached to the surface of the first substrate disposed on the jig of the cutting device, damage due to direct contact of the substrate can be prevented. Next, the first substrate with the first protective film attached thereto is brought into contact with a jig to inspect image defects through the second substrate from which the protective film has been removed. At this time, since the first protective film is attached to the surface of the first substrate disposed on the jig of the sorting apparatus as described above, damage due to direct contact of the substrate can be prevented. After the inspection, the first protective film attached to the surface of the first substrate is removed. Of course, the present invention is not limited thereto, and the first protective film of the first substrate may be removed first, and then the second substrate having the second protective film may be contacted with the jig for inspection, and then the second protective film may be removed. The change allows the process to proceed.

And the polarizing plate is attached to both sides of the selected good panel (S800). Polarization refers to light that vibrates strongly in a specific direction among light in all directions perpendicular to the direction of light propagation, and the polarizing plate is a function to make polarized light, that is, polarized light in one direction, vibrates in several directions. It can be called a kind of film having. Since the liquid crystal display panel uses the birefringence of the liquid crystal, it is very important to control the vibration direction of light incident on the liquid crystal molecules. To this end, the polarizing plate absorbs light that vibrates in the stretching direction and transmits light that vibrates in the vertical direction.

Then, a cleaning process (S900) is performed to finally remove the liquid crystal, foreign matters, etc. remaining on the surface of the unit liquid crystal cell. This is done by DI cleaning to clean the liquid crystal panel in deionized water (DI), detergent cleaning to be contained in the cleaning solution, and soaking in a solution such as IPA (Iso propyl Alcohol), followed by vibration by ultrasonic cleaning. Ultrasonic cleaning to clean while giving a, and dry cleaning to remove the cleaning solution on the liquid crystal panel by projecting nitrogen (N ₂ ) gas.

The manufacturing process of the liquid crystal display panel of the present invention is not limited to the above, and may be variously changed for the purpose and convenience of the process. For example, in the above-described exemplary embodiment, a unit liquid crystal cell is manufactured by cutting using a liquid crystal panel in which a plurality of liquid crystal panel regions are defined on a main substrate, but the present invention is not limited thereto. It is also possible to use this defined liquid crystal panel. In addition, as described above, instead of being separated into the first and second cutting processes, the first and second cutting processes may be simultaneously performed, separated into unit liquid crystal cells, and then the liquid crystal injection process may be performed.

4A to 4F are views for explaining the above-described manufacturing process.

FIG. 4A illustrates a plan view of a liquid crystal display including a plurality of liquid crystal panels. The liquid crystal display includes a plurality of liquid crystal panels formed by combining a first substrate 10 and a second substrate 20 having a predetermined pattern. It includes. To this end, after the first substrate 10 and the second substrate 20 are prepared, an active region of the first substrate 10 and / or the second substrate 20 is disposed between the two substrates 10 and 20. The sealant 30 is formed at the edge. The first substrate 10 and the second substrate 20 are aligned and bonded at a high temperature so as to maintain a constant cell gap. It is preferable that the sealant 30 use a thermosetting resin.

In FIG. 4A, a substrate having four liquid crystal panel regions is illustrated in the main substrate. However, the present invention is not limited thereto, and one liquid crystal panel may be formed on one large substrate according to the size of the substrate and the size of the liquid crystal panel. A liquid crystal panel can be formed. That is, the number of cases in which the liquid crystal cell may be formed on the main substrate may vary according to the area of the main substrate and the size of the panel formed on the main substrate.

Referring to FIG. 4B, protective films 40 and 50 are attached to outer surfaces of the bonded first and second substrates 10 and 20. That is, the first protective film 40 is attached to the outer surface of the first substrate 10, and the second protective film 50 is attached to the outer surface of the second substrate 20. Polyethylene films are used as the protective films 40 and 50.

Next, as shown in FIG. 4C, the liquid crystal panel in which the plurality of liquid crystal panel regions are defined is first cut to form an array type liquid crystal panel in which a plurality of unit liquid crystal cells are arranged in a line. Here, each liquid crystal panel region preferably has an internal space 60 into which liquid crystal is to be injected, and a liquid crystal injection hole 35 for liquid crystal injection into the internal space 60. Through this, the liquid crystal can be injected simultaneously into the plurality of liquid crystal panels.

After the liquid crystal material is injected into the space between the substrates through the liquid crystal injection hole 35 of each liquid crystal panel using a vacuum injection method, the liquid crystal injection hole 35 in which the liquid crystal is injected is sealed so that the liquid crystal does not flow out.

Thereafter, a second cutting process for separating the array type liquid crystal panel into each unit liquid crystal cell is performed. First, as shown in FIG. 4D, the first substrate 10 to which the first protective film 40 is attached is cut. (A) 4E, the 2nd protective film 50 is removed and the 2nd board | substrate 20 is cut | disconnected (B). Alternatively, the second protective film 50 may be removed after cutting the second substrate 20. At this time, since the first protective film 40 is attached to the surface of the first substrate 10 disposed on the jig of the cutting device, it is possible to prevent damage due to direct contact of the substrate.

Thus, it can be separated into a unit liquid crystal cell, and then the appearance and electrical defect inspection of each unit liquid crystal cell is carried out. At this time, since the first protective film 40 is attached to the surface of the first substrate 10 disposed on the jig of the sorting apparatus as described above, damage due to direct contact of the substrate can be prevented. After the inspection, the first protective film 40 is removed as shown in FIG. 4F.

Thereafter, referring to FIG. 4G, the polarizing plates 80 are attached to both sides of the selected good panels, and finally, liquid crystals and foreign substances remaining on the outer surface of the liquid crystal cell are removed to manufacture a liquid crystal display panel.

Such a method of manufacturing the liquid crystal display panel of the present invention protects the outer surface of the first substrate and the second substrate by using a film that is easy to attach and remove, thereby preventing contamination and scratching of the substrate through a simple and simple method. It has the effect of preventing and improving the strength of the substrate. In addition, the protective paper used in the conventional liquid crystal injection is not required, and the knife cleaning process can be omitted after the sealing process of the liquid crystal injection hole, thereby reducing the process time and reducing material costs.

As mentioned above, although this invention was demonstrated in detail using the preferable Example, the scope of the present invention is not limited to a specific Example and should be interpreted by the attached Claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

In the method for manufacturing a liquid crystal display panel according to the present invention, a protective film is attached to the outer surfaces of the bonded first substrate and the second substrate, and then a liquid crystal injection process is performed to prevent exposure of the substrate to the atmosphere and the substrate on the installation jig. By preventing direct contact of the substrate, foreign matter adheres to the surface of the substrate, and fine scratches and cracks can be prevented. Therefore, it is possible to improve the substrate strength of the liquid crystal display panel and reduce the appearance and the occurrence of electrical defects. In addition, there is an advantage that can contribute to the productivity improvement due to the effect of shortening the process time and material costs.

Claims (9)

In the manufacturing method of a liquid crystal display panel, Bonding the first substrate and the second substrate on which the thin film pattern is formed; Attaching a protective film to outer surfaces of the two bonded substrates; Injecting liquid crystal between the two substrates; Sealing the injection hole injecting the liquid crystal; And A method of manufacturing a liquid crystal display panel comprising the step of removing the protective film. The method according to claim 1, The protective film is a film of a polyethylene material, characterized in that the manufacturing method of the liquid crystal display panel. The method according to claim 1 or 2, Bonding the first substrate and the second substrate on which the thin film pattern is formed; Preparing the first substrate including a thin film transistor, a gate line, a data line, and a pixel electrode; Providing a second substrate including a black matrix layer, a color filter layer, and a common electrode; And And bonding the first substrate and the second substrate using a sealant. The method according to claim 3, Bonding the first substrate and the second substrate using a sealant, Forming a sealant pattern on one of the substrates, the sealant pattern surrounding an edge of a unit liquid crystal cell and including a liquid crystal injection hole for injecting the liquid crystal; And And pressing the two substrates at a high temperature to cure the sealant. The method according to claim 3, The sealant includes a thermosetting resin or a photocurable resin. The method according to claim 1 or 2, After injecting the liquid crystal, A method of manufacturing a liquid crystal display panel further comprising a cutting step for separating into a unit liquid crystal cell and a quality inspection step of the unit liquid crystal cell. The method according to claim 6, The cutting step includes cutting the first substrate and the second substrate, and removing the protective film attached to any one substrate, The quality inspection step of the unit liquid crystal cell includes a step of inspecting the substrate attached with the protective film in contact with the jig, The removing of the protective film may include removing the protective film attached to the substrate. The method according to claim 1 or 2, After removing the protective film, And attaching a polarizing plate to outer surfaces of the first substrate and the second substrate. The method according to claim 8, After attaching the polarizer, The method of manufacturing a liquid crystal display panel further comprising the step of performing a cleaning process.

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