KR20040006894A - Method for manufacturing liquid crystal display - Google Patents

Abstract

PURPOSE: A method for manufacturing a liquid crystal display is provided to proceed with a process without changing equipment and minimize the thickness of a panel of a liquid crystal device. CONSTITUTION: A plastic lower substrate(50b) is bonded with a first base substrate(50a) on both sides of a lower polarizing plate(55). An array substrate is manufactured by depositing a TFT(Thin Film Transistor) layer(60) on the plastic lower substrate in order. A plastic upper substrate(70b) is bonded with a second base substrate(70a) on both sides of an upper polarizing plate(75). A color filter substrate is formed by depositing an R, G, and B color filter layer(80) on the plastic upper substrate. The array substrate and the color filter substrate are bonded with each other on both sides of a liquid crystal layer(85). A liquid crystal panel is manufactured by separating the first base substrate and the second base substrate.

Description

Liquid crystal display manufacturing method {METHOD FOR MANUFACTURING LIQUID CRYSTAL DISPLAY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device. More specifically, a thinner and lighter liquid crystal is manufactured by manufacturing an array substrate on which a TFT element layer is formed or a color filter substrate on which R, G, and B color filter layers are formed using a thin plastic substrate. A liquid crystal display device manufacturing method capable of manufacturing a display panel.

In general, a thin film liquid crystal display (TFT LCD) has advantages in that it is suitable for high-speed response characteristics and a small number of high resolutions, and thus greatly contributes to realizing high quality, large size, and color of a display device.

In recent years, as the trend of light and short reduction of the liquid crystal display device is strongly demanded, PDAs of personal mobile communication devices have emerged and developed. The development of PDA has also been developed as a technology for changing information to an image, and the development of this technology requires the technology of the liquid crystal display device.

In general, a thin film transistor liquid crystal display device uses a color filter substrate having a black matrix and R, G, and B color filter layers formed thereon, like an array substrate having a gate bus line, a data bus line, and a switching operation TFT formed on the glass substrate. The structure bonded together with the liquid crystal layer interposed between them.

However, the use of plastic substrates instead of glass substrates is being developed in the market situation in which the reduction in manufacturing cost and the lighter and lighter reduction are pursued. Plastic substrates have advantages in that they can be manufactured lighter and thinner than glass substrates, and are inexpensive. However, since deformation damage by heat is easy, various problems are caused to be directly applied to the LCD process.

1A to 1D illustrate a manufacturing process of a liquid crystal display device array substrate using a plastic substrate according to the prior art.

As shown in FIG. 1A, in order to maintain a constant adhesive force with the insulating film 12 on the base substrate 10 for the array process of the liquid crystal display device, an adhesive layer is coated on the entire area of the base substrate 10 to form an adhesive layer. (11) is formed. Then, an insulating material 12 is formed on the entire area of the adhesive layer 12 by applying an insulating material such as silicon oxide or silicon nitride to a thickness of several thousand microseconds.

Here, the base substrate 10 usually uses a glass substrate, but is not used as a panel substrate of the liquid crystal display device even when the array process is completed. That is, the base substrate 10 is used as a stage in a process of manufacturing one array substrate or color filter substrate by bonding the TFT element layers to be manufactured and the plastic substrate to be manufactured.

The insulating film 12 also serves to protect and support the TFT elements (15 shown in FIG. 1B) or the layer on which the color filters are formed. The insulating film 12 is coated on the base substrate 10 with the adhesive layer 11 interposed therebetween, and the coating process of the insulating film 12 is completed and then the bonding process of the plastic substrate 20 (FIG. 1C). At the end, it maintains a weak adhesion with the adhesive layer 11 so that it can be easily separated.

The adhesive layer 11 used in the above may be used by applying a copper thin film.

As shown in FIG. 1B, the adhesive layer 11 and the insulating film 12 are formed on the base substrate 10, and then the TFT device layer 15 formed in the array process is formed on the insulating film 12. . The TFT element layer 15 formed on the insulating film 12 is generally arrayed in the reverse order of the arrangement of TFTs on the glass substrate in the liquid crystal display manufacturing process. This is because the transparent insulating substrate (here, the plastic substrate), which is the basis of the array substrate, is bonded at the last step after the TFT element layer 15 is formed.

Therefore, when the TFT structure of the array substrate has an inverter staggered structure, a source / drain electrode is formed on the gate electrode, so that the gate electrode is formed on the insulating layer, on the contrary, after the source / drain electrode is formed. The TFT element layer is formed.

Similarly, when the TFT structure of the array substrate has a back channel etch structure, since the gate electrode is formed on the source / drain electrodes, the source / drain electrodes are formed on the insulating layer after the gate electrode is formed. Hereinafter, the insulating film, data bus line, and gate bus line formed on the array substrate are formed in the same manner as in the related art with respect to the TFT.

As shown in FIG. 1C, after forming the TFT device layer 15 on the insulating film 12, the plastic substrate 20, which is the basis of the liquid crystal display array substrate, is positioned on the TFT device layer 15. Then stick together. At this time, one side of the plastic substrate 20 which is brought into contact with the TFT element layer 15 may be coated with an epoxy resin to improve adhesiveness. Then, the plastic substrate 20 bonded to the TFT element layer 15 at a constant pressure is firmly adhered by an epoxy resin applied to improve adhesion.

Thus, the TFT element layer 15 is adhered on the plastic substrate 20 bonded by the adhesive epoxy resin applied on the plastic substrate 20.

Then, as shown in Figure 1d, the base substrate 20 located below is separated. At this time, an adhesive layer 11 having a weak adhesive force is formed between the base substrate 10 and the TFT element layer 15 to be easily separated from the TFT element layer 15.

When the base substrate 10 is separated, a portion of the adhesive layer 11 may remain on the insulating layer 12, and then all of the adhesive layer 11 may be removed by a process of removing the insulating layer 12.

By using the plastic substrate 20 as described above, a lighter and shorter liquid crystal display device can be manufactured, and the plastic substrate, which is weak to heat, is bonded after the array process is completed, thereby preventing plastic deformation.

In addition, although the above description focuses on the TFT array substrate manufacturing process, the color filter substrate may also be manufactured in the same manner.

When the array substrate and the color filter substrate are manufactured in this manner, the panel is completed through a spacer spreading step, a seal line forming step, a liquid crystal injection step, and the like.

2 is a cross-sectional view of a panel of a liquid crystal display according to the related art.

As shown in FIG. 2, the array substrate has a structure in which the TFT element layer 15 is formed on the plastic lower substrate 20, and the color filter substrate has a color filter layer 35 formed on the plastic upper substrate 40. It has a formed structure. Panels are formed on the two substrates through a general liquid crystal display manufacturing process. The liquid crystal layer 25 is interposed between the color filter substrate and the array substrate, and a seal line 23 for enclosing the liquid crystal is formed at the edge of the panel.

Therefore, since the color filter substrate and the array substrate are formed on the basis of the plastic substrate, the color filter substrate and the array substrate are thinner and lighter than conventional glass substrates.

After the manufacturing process of the thin plastic substrate as described above, there is a method of directly mounting the thin plastic substrate on the base substrate instead of the bonding method and then proceeding the array process or color filter manufacturing process on the plastic substrate.

The following relates to a method of directly arranging TFT element layers or forming color filter layers on a plastic substrate according to the prior art.

3A to 3D are cross-sectional views illustrating another liquid crystal display device manufacturing process according to the prior art.

As shown in FIG. 3A, a glass substrate or a plastic substrate is used as the base substrate 10, and the plastic lower substrate 17 of the liquid crystal display device is directly mounted on the base substrate 10. In this case, the base substrate 10 and the plastic lower substrate 17 may be fixed by using a tape or a fixing pin so that the base substrate 10 and the plastic lower substrate 17 may be safely attached during the array process.

Then, as illustrated in FIG. 3B, an array process is performed to sequentially form the TFT element layer 15 on the plastic lower substrate 17. The TFT device layer 15 deposits a gate metal film on the plastic lower substrate, exposes, develops, and etches to form a gate bus line and a gate electrode, subsequently applies a gate insulating film, and forms a source / drain electrode. To form a TFT. The data bus line and the ITO pixel electrode are formed to complete one array substrate.

As shown in FIG. 3C, when the TFT device layer 15 is completed on the plastic lower substrate 17 and the array substrate is manufactured, the base substrate 10 supporting the plastic lower substrate 17 is separated. . In this case, as shown in FIG. 1B, the TFT element layer 15 is formed on the plastic lower substrate 17 without directly arranging the TFT element layers 15 in reverse order.

In the same manner, the color filter substrate may be manufactured. The R, G, and B color filter layers are sequentially formed after the plastic upper substrate is fixed on the base substrate serving as the support substrate. Similarly, the base substrate and the color filter substrate are separated.

As illustrated in FIG. 3D, when the array substrate and the color filter substrate are manufactured as described with reference to FIG. 3C, the two substrates are bonded to each other with the liquid crystal layer 25 interposed therebetween.

In order to seal the liquid crystal layer 15, a seal line 23 is formed at an edge at which the array substrate and the color filter substrate are bonded to each other, and then bonded.

Since the array substrate and the color filter substrate use a plastic substrate, there is an advantage in that the thickness can be made significantly thinner.

19, which is described but not described in the drawings, is a color filter layer, and 18 is a plastic upper substrate.

However, the liquid crystal display device using the plastic substrate described above has the following problems.

First, the method of forming an adhesive layer and an insulating film on a base substrate, then forming a TFT element layer, and then bonding the plastic substrate is not clear how weak the adhesion of the adhesive layer for separation of the base substrate is. I don't. There is a problem of damaging the insulating layer and the TFT element layer during the base substrate separation.

In addition, when the TFT device layer is formed, there is a problem in that the best layer of the TFT device layer to be bonded to the plastic substrate is formed to have a uniform curvature and not evenly adheres to the entire area of the plastic substrate. If the overcoat layer is excessively applied, the adhesive force with the plastic substrate may be weakened.

Second, when a plastic substrate is processed on a glass base substrate, and then an array substrate or a color filter substrate is manufactured through a general liquid crystal display device process, as shown in Table 1, the plastic substrate and glass are subjected to heat. Due to the difference in expansion coefficient, there is a problem in that the substrate cracking, damage occurs.

Material Elasticity (Gpa) Poisson ratio Expansion Ratio (10 ^-6 / K) Glass 73 0.21 7.2 PES / PET / PI 2 ~ 3 0.3 40-60

In addition, since the TFT element layer and the color filter layer are formed on the thin plastic substrate by bonding under a strong pressure, there is a high risk of breakage of the thin plastic substrate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device manufacturing method capable of forming a thin and thin liquid crystal display panel by arranging TFT element layers or forming a color filter layer while protecting a thin plastic substrate against heat. .

1A to 1D illustrate a manufacturing process of a liquid crystal display device array substrate using a plastic substrate according to the prior art.

2 is a cross-sectional view of a panel of a liquid crystal display device manufactured according to the prior art.

3A to 3D are sectional views showing another liquid crystal display manufacturing process according to the prior art.

4A to 4D illustrate a process of manufacturing a liquid crystal display device using a plastic substrate according to the present invention.

5 is a cross-sectional view of a panel of a liquid crystal display device manufactured according to the present invention.

6A to 6D illustrate a method of manufacturing a liquid crystal display device according to another exemplary embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

50a: first base substrate 50b: plastic lower substrate

51: adhesive layer 60: TFT element layer

70a: second base substrate 70b: plastic upper substrate

55: lower polarizer 75: upper polarizer

80: color filter layer 81: seal line

85: liquid crystal layer

In order to achieve the above object, the liquid crystal display device manufacturing method according to the present invention,

Bonding the plastic lower substrate and the first base substrate with the lower polarizer therebetween;

Manufacturing an array substrate by sequentially depositing a TFT device layer on the plastic lower substrate;

Bonding the plastic upper substrate to the second base substrate with the upper polarizer therebetween;

Depositing R, G, and B color filter layers sequentially on the plastic upper substrate to form a color filter substrate;

Bonding the array substrate and the color filter substrate to each other with a liquid crystal layer interposed therebetween; and

And separating the first base substrate and the second base substrate to produce a liquid crystal panel.

Here, an adhesive layer is formed between the first base substrate and the lower polarizer to facilitate separation of the first base substrate, and between the second base substrate and the upper polarizer to facilitate separation of the second base substrate. It is characterized by forming an adhesive layer on the.

In addition, the lower polarizing plate and the upper polarizing plate is characterized in that the coating film or a polarizing plate in the form of a sheet that can be coated on plastic.

In addition, the liquid crystal display device manufacturing method according to another embodiment of the present invention,

Providing a lower polarizing plate bonded by a first protective layer and a second protective layer to be an array substrate of the liquid crystal display with the polarizing film interposed therebetween;

Attaching a first base substrate to the second protective layer;

Sequentially depositing a TFT device layer on the first protective layer to form an array substrate;

Providing an upper polarizing plate bonded by a third protective layer and a fourth protective layer to be the color filter substrate of the liquid crystal display with the polarizing film interposed therebetween;

Attaching a second base substrate to the fourth protective layer;

Depositing R, G, and B color filter layers sequentially on the third protective layer to form a color filter substrate;

Bonding the array substrate and the color filter substrate to each other with a liquid crystal layer interposed therebetween; And

The liquid crystal panel may be formed by separating the first base substrate and the second base substrate.

Here, in order to easily separate the first base substrate from the protective layer of the lower polarizing plate, an adhesive layer is formed between the first base substrate and the protective layer of the lower polarizing plate, and the second base substrate and the upper polarizing plate In order to easily separate from the protective layer, an adhesive layer is formed between the second base substrate and the protective layer of the upper polarizing plate.

According to the present invention, there is an advantage that an ultra-thin array substrate or a color filter substrate can be manufactured by forming a TFT element layer and a color filter layer on a thin plastic substrate.

In addition, by using the protective layer on one side of the polarizing plate as a substrate for forming a TFT element layer or a color filter layer, the manufacturing process can be simplified, and a thinner liquid crystal display panel can be manufactured.

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

4A to 4D illustrate a process of manufacturing a liquid crystal display using a plastic substrate according to the present invention.

As shown in FIG. 4A, the lower polarizer 55 is attached to one side of the plastic lower substrate 50b for forming the TFT device layer, and the lower polarizer is not in contact with the plastic lower substrate 50b. The first base substrate 50a to support the plastic lower substrate 50b and the lower polarizer 55 is attached to one side of the 55 with the adhesive layer interposed therebetween.

Accordingly, the substrate for forming the array substrate of the liquid crystal display device has a structure in which the plastic lower substrate 50b and the first base substrate 50a are bonded to each other with the lower polarizer 55 interposed therebetween. 50b) is used as an array substrate of the liquid crystal display device integrally with the lower polarizer 55, and thus is more firmly attached. On the contrary, since the TFT element layer is formed on the plastic lower substrate 50b and then separated, the first base substrate 50a may be weakly attached to the lower polarizing plate with an adhesive layer interposed therebetween.

In the case of using the substrate formed in the form of a thin sheet (Sheet), the lower polarizing plate 55 is attached as described above, in the case of coating the polarizing plate in the form of a thin film (film) on the plastic lower substrate (50b) Coating the polarizing plate on the lower polarizing plate 55 to form.

In addition, the adhesive layer 51 which bonds the lower polarizer 55 and the first base substrate 50a to form an adhesive film with a predetermined thickness on the entire area of the first base substrate 50a or the lower polarizer 55. Proceed by application. The adhesive layer 51 uses a known material such as silicon oxide or silicon nitride.

In addition, the first base substrate 50a is used as a base substrate in the array process of forming the TFT device layer 60 on the plastic lower substrate 50b and serves to support the substrate, as well as the array process. By dissipating the heat generated in the middle serves as a protective substrate to prevent the temperature of the plastic lower substrate (50b) to rise.

Then, as shown in FIG. 4B, the substrate on which the first base substrate 50a, the lower polarizer 55, and the plastic lower substrate 50b are bonded is loaded into the chamber.

Although not clearly shown, gate bus lines and TFT gate electrodes are sequentially formed on the resultant, and a gate insulating film is formed. Subsequently, a source / drain electrode and a data bus line are formed to complete the TFT, the ITO pixel electrode is deposited, and an over coating layer is formed to form the TFT element layer 60.

In the process of forming the TFT element layer 60, the temperature in the chamber reaches 300 to 400 ° C, but the plastic lower substrate 50b and the first base substrate 50a are disposed on both sides with the lower polarizer 55 therebetween. ) Can be bonded to disperse the heat received by the substrate as a whole to prevent deformation of the plastic.

In addition, since the thickness of the plastic lower substrate 50b used as the base of the array substrate is significantly thinner than that of the glass substrate used in the array substrate, the first base substrate 50a may move in the process or the deposition process. It prevents excessive warpage from occurring.

That is, after the manufacturing process is carried out in a structure in which two plastic substrates are bonded together to have a certain thickness until the TFT device layer 60 is formed, and also resistant to heat, when the array substrate is completed, the bonded plastics By separating the first base substrate 50a which is used as the base substrate among the substrates, there is no difficulty in proceeding the existing manufacturing process of the liquid crystal display.

In the same manner, the color filter substrate proceeds in almost the same manner as the array substrate manufacturing process.

Although not shown in the drawings, the color filter substrate is also bonded to the plastic substrate serving as the base substrate and the plastic substrate on which the culper filter layer is to be formed, with the polarizer interposed therebetween, and then the color filter manufacturing process.

The process of attaching the upper polarizing plate on the plastic substrate is the same as the array substrate process.

As described above, when the color filter substrate is completed, the spacer is dispersed on the color filter substrate, a seal line is formed on the array substrate, and then the two substrates are bonded. After bonding, the liquid crystal is injected and encapsulated to complete the panel.

As shown in FIG. 4C, the TFT element layer 60 and the color filter layer 80 are formed on the upper and lower plastic substrates 70b and 50b, respectively, to form the array substrates 50b and 60 and the color filter substrates 70b and 80, respectively. And a panel structure of the liquid crystal display device bonded together with the liquid crystal layer 85 interposed therebetween.

As described above with reference to FIGS. 4A and 4B, the array substrates 50b and 60 have a TFT device layer on a substrate on which a plastic lower substrate 50b and a first base substrate 50a are bonded to each other with a lower polarizer 55 interposed therebetween. 60 is formed by separating the plastic lower substrate and the TFT element layer.

Similarly, the color filter substrates 70b and 80 have R, G, and B color filter layers 80 on the substrate on which the plastic upper substrate 70b and the second base substrate 70a are bonded with the upper polarizer 75 interposed therebetween. ) Is formed to separate the plastic upper substrate 70b and the color filter layer 80.

A liquid crystal is injected between the color filter substrates 70b and 80 and the array substrates 50b and 60 to form a liquid crystal layer 85, and two substrates are formed at both edges by sealing lines 81 to seal the liquid crystal. This is firmly cemented.

As shown in FIG. 4D, the color filter substrate including the plastic upper substrate 70b and the color filter layer 80 has an upper polarizer 75 attached to one side of the plastic upper substrate 70b, and the upper polarizer 75 is bonded to the second base substrate 70a with the adhesive layer 51 therebetween, and the second base substrate 70a serving as the support substrate is separated in the substrate forming process. The second base substrate 70a is easily separated due to the weak adhesive force of the adhesive layer 51.

In addition, even in an array substrate including the plastic lower substrate 50b and the TFT element layer, a lower polarizer 55 is attached on one side of the plastic lower substrate 50b, and the lower polarizer 55 is an adhesive layer 51. Since the first base substrate 50a is bonded to each other with the gap between them, the first base substrate 50a is separated to complete the array substrate.

In the present invention, although the adhesive layer 51 is used to bond the first and second base substrates 50a and 70a with the upper and lower polarizers 55 and 75 with a constant adhesive force, respectively, Fixture clamps or retaining tapes may be used at the edges to secure the two plastics to the process.

5 is a cross-sectional view of a panel of a liquid crystal display device manufactured according to the present invention.

As shown in FIG. 5, the first base substrate 50a is separated from the lower polarizer 55 so that the TFT element layer 60 is formed on the substrate on which the lower polarizer 55 and the plastic lower substrate 50b are bonded. It is formed to form an array substrate.

Similarly, the color filter substrate is formed by separating the second base substrate 70a from the upper polarizer 75 so that the color filter layer 80 is formed on the substrate on which the upper polarizer 75 and the plastic upper substrate 70b are bonded. It's a rescue.

In addition, since the upper polarizer 75 and the lower polarizer 55 are attached or coated before the array substrate and the color filter substrate are manufactured, a separate polarizer attachment process may be omitted after the panel is completed.

6A to 6D illustrate a method of manufacturing a liquid crystal display device according to another exemplary embodiment of the present invention.

As shown in FIG. 6A, the lower polarizing plate 90 is generally coated with first and second protective layers 90a and 90c on both sides thereof with the polarizing film 90b interposed therebetween, and the protective layer 90a. , 90c) uses a plastic-based acrylic resin. When the lower polarizer 90 has such a structure, the thickness of the lower polarizer 90 may be increased so that the first protective layer 90a of both protective layers may serve as a plastic lower substrate of the liquid crystal display when the polarizer is manufactured. To form.

That is, the first protective layer 90a is integrally formed to serve as a protective layer of the lower polarizer 90 and to serve as an array substrate on which a TFT device layer to be formed later is formed.

Therefore, the structure of the lower polarizing plate 90 is bonded by two first and second protective layers respectively on both sides with the polarizing film 90b therebetween. The first base substrate 91 is attached to the outer surface of the second passivation layer 90c so that a large fluidity of the lower polarizing plate 90 integrally formed with the first passivation layer 90a on which the TFT element layer is to be formed. Complementary to eliminate the problems in the process.

In particular, as described above, the lower substrate of the array substrate is integrally formed when the lower polarizer is manufactured, so that the process of attaching the lower polarizer is unnecessary.

As shown in FIG. 6B, after loading the lower polarizing plate 90 to which the first base substrate 91 is attached to the chamber, the TFT element layer (1) is formed on the first protective layer 90a of the lower polarizing plate 90. 93). In the TFT device layer 93 forming process, a liquid crystal display array process generally used in a manufacturing process may be applied as it is.

The first protective layer 90a of the lower polarizing plate 90 serves to protect the polarizing film 90b interposed with the second protective layer 90c therebetween from heat generated during the array process. It is responsible for the plastic lower substrate that supports layer 93. In addition, when the TFT device layer 93 is arrayed, the adhesive film may be coated on the first passivation layer 90a to maintain a strong adhesive force.

In addition, the first base substrate 91 attached to the second protective layer 90c of the lower polarizing plate 90 may be separated from the second protective layer 90c by the adhesive layer having a weak adhesive force. 2 may be formed on the protective layer.

By the same method, the color filter substrate also increases the thickness of one side protective layer of the upper polarizing plate to produce an integrated upper polarizing plate having the properties of the color filter lower substrate and the polarizing plate, and then forms the color filter substrate to form the color filter substrate. .

Therefore, since the array substrate and the color filter substrate of the liquid crystal display device formed in the present invention use a substrate integrally formed on the polarizing plate, a separate polarizing plate attaching process is not necessary.

As shown in FIG. 6C, when the array substrate and the color filter substrate in which the polarizers are integrated are completed, the two substrates are bonded after undergoing a spacer spreading process and a seal line forming process.

In the array substrate, the TFT element layer 93 is formed on the first passivation layer 90a of the lower polarizing plate 90 while the first base substrate 91 of the lower polarizing plate 90 is bonded to each other. In the substrate, the color filter layer 94 is formed on the third protective layer 100a of the upper polarizing plate 100 while the upper polarizing plate 100 and the second base substrate 101 are bonded to each other.

The liquid crystal layer 95 is interposed between the array substrate and the color filter substrate integrally formed with the polarizing plate in this way, and seal lines 96 are formed on both sides to seal the liquid crystal.

In order to bond the array substrate and the color filter substrate, a certain pressure must be applied. In order to prevent damage to the upper and lower polarizers 90 and 100, the first base substrate 91 and the second base substrate 101 are prevented. The silver is separated from the upper and lower polarizers 90 and 100 after the two substrates are bonded.

Although shown in the figure, 100c, which is not described, represents the fourth protective layer.

As shown in FIG. 6D, as a whole, the array substrate has a structure in which the TFT element layer 93 is formed on the first protective layer of the lower polarizer 90, and the color filter substrate is formed of the upper polarizer 100. 3 is a structure in which the color filter layer 94 is formed on the protective layer.

The upper and lower polarizing plates 90 and 100 have a structure in which the polarizing films 90b and 100b are inserted with the protective layers 90a, 90c, 100a and 100c interposed therebetween, and the first polarizing plates 90 are formed. The passivation layer 90a and the third passivation layer 100a of the upper polarizing plate 100 are formed somewhat thicker to be used as an array substrate or a color filter substrate.

The array substrates 90 and 93 and the color filter substrates 100 and 94 formed integrally with the polarizing plate are bonded to each other with the liquid crystal layer 95 interposed therebetween, and seal lines 96 are formed at both edges thereof. It formed and enclosed the liquid crystal.

Since the color filter substrate and the array substrate are formed integrally with the upper and lower polarizers, the process of attaching the polarizer may be omitted.

By using the protective layer of the polarizing plate as a base substrate for forming the TFT element layer or the color filter layer, there is an advantage that can be made ultra-thin than conventionally used a separate plastic substrate.

As described in detail above, the present invention provides a method of manufacturing an array substrate or a color filter substrate by bonding a polarizing plate and a plastic base substrate such as a plastic and a thermal expansion coefficient to each other before forming a TFT element layer or a color filter layer on a thin plastic substrate. There is an effect that can proceed the process without change.

In addition, there is an advantage that the panel thickness of the liquid crystal display device can be made as thin as possible by using a plastic substrate.

In addition, by forming a part of the protective layer of the polarizing plate thicker to be used as the base substrate of the polarizing film protective layer, TFT element layer, and color filter layer, not only can the thickness of the panel be thinner but also the process of attaching the polarizing plate can be simplified to simplify the manufacturing process. There is an advantage to that.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

Claims (7)

Bonding the plastic lower substrate and the first base substrate with the lower polarizer therebetween; Manufacturing an array substrate by sequentially depositing a TFT device layer on the plastic lower substrate; Bonding the plastic upper substrate to the second base substrate with the upper polarizer therebetween; Depositing R, G, and B color filter layers sequentially on the plastic upper substrate to form a color filter substrate; Bonding the array substrate and the color filter substrate to each other with a liquid crystal layer interposed therebetween; And Manufacturing a liquid crystal panel by separating the first base substrate and the second base substrate. The method of claim 1, Forming an adhesive layer between the first base substrate and the lower polarizing plate to facilitate separation of the first base substrate. The method of claim 1, Forming an adhesive layer between the second base substrate and the upper polarizing plate to facilitate the separation of the second base substrate. The method of claim 1, The lower polarizing plate and the upper polarizing plate is a coating film that can be coated on a plastic or a liquid crystal display device, characterized in that the sheet-shaped polarizing plate. Providing a lower polarizing plate bonded by a first protective layer and a second protective layer to be an array substrate of the liquid crystal display with the polarizing film interposed therebetween; Attaching a first base substrate to the second protective layer; Sequentially depositing a TFT device layer on the first protective layer to form an array substrate; Providing an upper polarizing plate bonded by a third protective layer and a fourth protective layer to be the color filter substrate of the liquid crystal display with the polarizing film interposed therebetween; Attaching a second base substrate to the fourth protective layer; Depositing R, G, and B color filter layers sequentially on the third protective layer to form a color filter substrate; Bonding the array substrate and the color filter substrate to each other with a liquid crystal layer interposed therebetween; and And separating the first base substrate and the second base substrate to form a liquid crystal panel. The method of claim 5, wherein And a bonding layer is formed between the first base substrate and the protective layer of the lower polarizing plate to easily separate the first base substrate from the second protective layer of the lower polarizing plate. The method of claim 5, wherein A method of manufacturing a liquid crystal display device, characterized in that an adhesive layer is formed between the second base substrate and the protective layer of the upper polarizing plate to easily separate from the fourth protective layer of the second base substrate and the upper polarizing plate.