KR20090072391A - LCD and its manufacturing method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and has a short prevention member corresponding to a step portion generated by overlapping a color filter pattern and a black matrix, thereby preventing a short between a pixel electrode and a common electrode due to a conductive foreign material, and preventing a cell gap. The present invention provides a liquid crystal display and a method of manufacturing the same, which can reduce the number of defects and improve the response speed.

Description

Liquid crystal display and its manufacturing method {LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF FABRICATING THE SAME}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device and a manufacturing method thereof capable of reducing defects caused by foreign substances.

Today, liquid crystal display devices (LCDs) are spotlighted as next generation advanced display devices with low power consumption, good portability, technology intensive, and high added value.

The liquid crystal display device includes a thin film transistor array substrate, a color filter array substrate, and a liquid crystal layer interposed between the two substrates. Such a liquid crystal display device may display various images by applying an electric field to the liquid crystal of the liquid crystal layer to adjust the light transmittance of the liquid crystal.

1 is an enlarged cross-sectional view of a portion of a conventional liquid crystal display.

Referring to FIG. 1, a conventional liquid crystal display device includes a liquid crystal layer interposed between a color filter array substrate, a thin film transistor array substrate, and the color filter array substrate and the thin film transistor array substrate facing each other.

The thin film transistor array substrate may include a thin film transistor Tr, a pixel electrode 8 electrically connected to the thin film transistor Tr, and an alignment layer 9 disposed on the pixel electrode 8.

The color filter array substrate includes a black matrix 2, a color filter pattern 3, a common electrode 5, and an alignment layer 6 disposed on the substrate 1. The black mattress 2 has an opening and is disposed on the substrate 1. The color filter pattern 3 partially overlaps the black matrix 2 and is disposed in the opening. In this case, an overlapping portion of the black matrix 2 and the color filter pattern 3 may protrude.

In manufacturing such a liquid crystal display device, a conductive foreign material 10 may be interposed between the thin film transistor array substrate and the color filter array substrate. The common electrode 5 and the pixel electrode 8 may be shorted by the conductive foreign material 10, resulting in poor image quality such as bright point defect.

In order to prevent such short defects, the thin film transistor array substrate and the color filter array substrate should have a constant cell gap. Here, as the overlapping portion of the black matrix 2 and the color filter pattern 3 protrudes from other regions, the cell gap corresponding to the overlapping portion may be smaller than that of the other regions. Thus, in consideration of the cell gap corresponding to the overlapping portion, the overall cell gap of the thin film transistor array substrate and the color filter array substrate may be further increased to prevent the short defect.

However, when the overall cell gap of the thin film transistor array substrate and the color filter array substrate increases, the response speed of the liquid crystal display may be lowered. In addition, when the cell gap is increased, the thickness of the liquid crystal display device is increased, thereby countering the trend of thinning today.

One object of the present invention is to provide a liquid crystal display device and a method of manufacturing the same that can prevent a short defect caused by foreign matter.

Another object of the present invention is to provide a method of manufacturing a liquid crystal display device which can reduce a cell gap.

In order to achieve the above technical problem, an aspect of the present invention provides a liquid crystal display device. The liquid crystal display includes a first substrate having a transmissive part and a blocking part, a thin film transistor disposed at the blocking part, a first electrode disposed at the transmissive part and electrically connected to the thin film transistor, and a second facing the first substrate. A substrate, a black matrix disposed on the second substrate corresponding to the blocking unit, at least a portion of the black matrix overlapping the black matrix, a color filter pattern disposed on the second substrate corresponding to the transmission unit, and the color filter pattern A second electrode disposed on a second substrate, a short preventing member disposed on the second electrode corresponding to the blocking part to prevent a short between the first and second electrodes, and the first and second And a liquid crystal layer interposed between the two electrodes.

Another aspect of the present invention to achieve the above technical problem provides a method for manufacturing the liquid crystal display device. The manufacturing method includes providing first and second substrates each having a transmissive part and a blocking part defined therein, forming a thin film transistor on the blocking part of the first substrate, and the thin film transistor on the transmissive part of the first substrate. Forming a first electrically connected electrode, forming a black matrix on the blocking portion of the second substrate, at least a portion of the black matrix overlapping the color matrix, and forming a color filter pattern on the transmission portion of the second substrate Forming a second electrode on a second substrate including the color filter pattern; preventing a short between the first and second electrodes on the second electrode corresponding to the blocking part; Forming a member, and bonding the first and second substrates so that the first and second electrodes face each other and forming a liquid crystal layer between the first and second electrodes. Steps.

Another aspect of the present invention to achieve the above technical problem provides a liquid crystal display device. The liquid crystal display includes a first substrate having a transmissive part and a blocking part, a thin film transistor disposed at the blocking part, a first electrode disposed at the transmissive part and electrically connected to the thin film transistor, and a second facing the first substrate. A substrate, a black matrix disposed on the second substrate corresponding to the blocking unit, at least a portion of the black matrix overlapping the black matrix, a color filter pattern disposed on the second substrate corresponding to the transmission unit, and the color filter pattern A second electrode disposed on a second substrate, and a liquid crystal layer interposed between the first and second electrodes,

The color filter pattern overlapping the black matrix may have a smaller thickness than the color filter pattern disposed on the transmission part.

Another aspect of the present invention to achieve the above technical problem provides a method of manufacturing the liquid crystal display device. The manufacturing method includes providing first and second substrates each having a transmissive part and a blocking part defined therein, forming a thin film transistor on the blocking part of the first substrate, and the thin film transistor on the transmissive part of the first substrate. Forming a first electrically connected electrode, forming a black matrix on the blocking portion of the second substrate, at least a portion of the black matrix overlapping the color matrix, and forming a color filter pattern on the transmission portion of the second substrate Forming a second electrode on the second substrate including the color filter pattern, and bonding the first and second substrates to each other so that the first and second electrodes face each other. Forming a liquid crystal layer between the two electrodes,

The color filter pattern overlapping the black matrix is formed to have a smaller thickness than the color filter pattern disposed on the transmission part.

The liquid crystal display of the present invention includes a short prevention member, thereby preventing short defects between the common electrode and the pixel electrode due to foreign matters, and simultaneously reducing the cell gap, thereby improving the response speed.

Since the short prevention member of the liquid crystal display device of the present invention does not need to include a separate spacer including a cell gap holding part, the number of steps can be reduced and the unit cost can be reduced.

The liquid crystal display of the present invention can reduce the thickness of the color filter overlapping the black matrix, thereby preventing short defects between the common electrode and the pixel electrode due to foreign matters, and at the same time reducing the cell gap.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings of the liquid crystal display. The following embodiments are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the invention is not limited to the embodiments described below and may be embodied in other forms. In the drawings, the size and thickness of the device may be exaggerated for convenience. Like numbers refer to like elements throughout.

2 and 3 are diagrams for explaining a liquid crystal display device according to a first embodiment of the present invention.

2 is an enlarged plan view illustrating two adjacent pixels among a plurality of pixels included in the liquid crystal display according to the first exemplary embodiment of the present invention.

3 is a cross-sectional view taken along the line II ′ of FIG. 2.

2 and 3, a liquid crystal display according to a first embodiment of the present invention includes a first and second substrates 100 and 200 facing each other and between the first and second substrates 100 and 200. The liquid crystal layer 260 is interposed therebetween.

The first substrate 100 may have a transmission portion that transmits light and a blocking portion that blocks light. A plurality of wires, for example, gate wires, data wires, and the like, and the thin film transistor Tr may be disposed in the blocking portion of the first substrate 100. In addition, the pixel electrode 130 electrically connected to the thin film transistor Tr may be disposed in the transmission portion of the first substrate 100.

In detail, a plurality of gate lines 101 arranged in the first direction are disposed on the first substrate 100. Each end of the plurality of gate wires 101 is electrically connected to a gate pad part (not shown). The gate pad unit applies a gate signal provided from an external driving circuit unit to the gate wiring 101, and the gate wiring 101 applies the gate signal to a thin film transistor Tr, which will be described later, and the thin film transistor Tr. Can be turned on.

A plurality of data lines 102 arranged in the second direction crossing the first direction are disposed on the first substrate 100. By the intersection of the plurality of gate lines 101 and the plurality of data lines 102, the first substrate 100 defines a plurality of pixels. Each end of the plurality of data lines 102 is electrically connected to a data pad unit (not shown). The data pad unit applies a data signal to the data line 102 from an external driving circuit unit, and the data line 102 transmits the data signal to the thin film transistor Tr on which the gate signal is applied. Is authorized.

The gate wiring 101 and the data wiring 102 are insulated from each other by the gate insulating film 110 interposed therebetween. The gate insulating layer 110 may be made of silicon oxide or silicon nitride.

Each pixel includes a thin film transistor Tr and a pixel electrode 130 electrically connected to the thin film transistor Tr. The thin film transistor Tr is turned on by the gate signal of the gate line 101 and applies a pixel voltage to the pixel electrode 130 by a data signal applied from the data line 102.

The thin film transistor Tr includes the semiconductor electrodes 121 and 131 overlapping the gate electrode 111 with the gate electrode 111 branched from the gate wiring 101, the gate insulating layer 110 interposed therebetween, and the semiconductor. Source electrodes 141 disposed on the patterns 121 and 131 and electrically connected to the data lines 102, and drain electrodes disposed on the semiconductor patterns 121 and 131 and spaced apart from the source electrodes 141. 151).

The semiconductor patterns 121 and 131 include first and second semiconductor patterns 121 and 131. The first semiconductor pattern 121 may be made of amorphous silicon. In addition, the first semiconductor pattern 121 has a channel corresponding to between the source electrode 141 and the drain electrode 151. The second semiconductor pattern 131 may be formed of amorphous silicon doped with impurities. The second semiconductor pattern 131 forms an ohmic contact between the second semiconductor pattern 131 and the metal electrode, that is, the source electrode 141 and the drain electrode 151.

The thin film transistor Tr and the pixel electrode 130 are insulated from each other by the passivation layer 120 interposed therebetween. The passivation layer 120 includes a contact hole exposing a portion of the drain electrode 151 provided in the thin film transistor Tr, and the thin film transistor Tr and the pixel electrode 130 are formed through the contact hole. It can be electrically connected to each other.

Meanwhile, a black matrix 210 is disposed on the second substrate 200 corresponding to the blocking unit to prevent light leakage. That is, the black matrix 210 may correspond to the data line 102, the gate line 101, and the thin film transistor Tr. In addition, the black matrix 210 may have an opening exposing the second substrate 200 corresponding to the transmission part.

A color filter pattern 220 for filtering a specific wavelength is disposed on the second substrate of the transmission part. An edge portion of the color filter pattern 220 may overlap the black matrix 210. In this case, the edge portion may naturally protrude by the black matrix 210. That is, the color filter pattern 220 may have a stepped portion by the black matrix 210.

The common electrode 230 is disposed on the entire surface of the second substrate 200 including the black matrix 210 and the color filter pattern 220. The common electrode 230 may be made of a transparent conductive material, for example, ITO or IZO.

The short prevention member 240 is disposed on the common electrode 230 corresponding to the blocking unit. The short prevention member 240 may be disposed on an area protruded by the overlap of the black matrix 210 and the color filter pattern 220, that is, on the stepped portion of the color filter pattern 220. The short prevention member 240 serves to prevent a short between the pixel electrode 130 and the common electrode 230. The short prevention member 240 may be made of an insulating material. For example, the material for forming the short prevention member 240 may be acrylic resin, polystyrene resin, polyamide resin, polyimide resin, polyarylether resin, heterocyclic polymer resin, parylene resin, benzocyclobutyne resin, poly Acrylonitrile resin and the like.

The short prevention member 240 may include a cell gap holding part 250 protruding from a part thereof. The cell gap maintaining part 250 serves to maintain a constant cell gap between the first and second substrates 100 and 200.

Accordingly, since the short prevention member 240 is disposed in an area having a smaller cell gap than at least another area, that is, an overlapping area of the color filter pattern 220 and the black matrix 210, even if conductive foreign matter is disposed in the cell gap. It is possible to prevent the pixel electrode 130 and the common electrode 230 from being shorted by the conductive foreign material. Accordingly, even if the cell gap between the first and second substrates 100 and 200 is reduced, the short failure of the pixel electrode 130 and the common electrode 230 can be prevented by the short prevention member 240. have. In other words, the liquid crystal display according to the exemplary embodiment of the present invention includes the short prevention member 240, thereby preventing short defects between the pixel electrode 130 and the common electrode 230, and at the same time, the first and second substrates. It is possible to reduce the cell gap between (100, 200). As a result, the liquid crystal display according to the exemplary embodiment of the present invention can prevent bright spots and improve response speed.

Although not illustrated in FIG. 3, reference numerals 122 and 132, which are not described, may be dummy first and second semiconductor patterns, respectively. The dummy first and second semiconductor patterns may be disposed under the data line 102. The data line 102 and the first and second semiconductor patterns 121 and 131 may be formed using the same mask. Because there is.

4 to 8 are cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to a first embodiment of the present invention.

Referring to FIG. 4, to manufacture a liquid crystal display, first, a first substrate 100 having a blocking portion and a transmission portion defined therein is provided. A plurality of wires, for example, gate wires, data wires, and thin film transistors Tr are formed in the blocking unit. The thin film transistor Tr may include a gate electrode 111, a gate insulating layer 110, semiconductor patterns 121 and 131, and source and drain electrodes 141 and 151.

The passivation layer 120 is formed on the first substrate 100 including the plurality of wirings and the thin film transistor Tr. The passivation layer 120 may be formed of silicon oxide or silicon nitride. The passivation layer 120 includes a contact hole exposing the drain electrode 151.

The pixel electrode 130 is electrically connected to the drain electrode 151 through the contact hole on the passivation layer 120 corresponding to the transmission part. The pixel electrode 130 may be formed through a photo process. An example of a material for forming the pixel electrode 130 may be ITO or IZO.

Referring to FIG. 5, a second substrate 200 in which a blocking part and a transmission part are defined separately from the first substrate 100 is provided.

The black matrix 210 is formed in the blocking unit. The black matrix 210 may be formed by exposing and developing the black resin film after forming a black resin film on the second substrate 200. In contrast, when the black matrix 210 is formed of an inorganic material such as chromium, the black matrix 210 may be formed through a photo process.

After the color filter resin film is formed on the second substrate 200 including the black matrix 210, the color filter pattern 220 is formed by performing exposure and development processes. The color filter pattern 220 may be formed on the transmission part, and a part of the color filter pattern 220 may be formed to overlap the black matrix 210.

The common electrode 230 is formed on the second substrate 200 including the black matrix 210 and the color filter pattern 220. The common electrode 230 may be formed of a transparent conductive film, for example, ITO or IZO.

Referring to FIG. 6, a short prevention layer 240a is formed on the second substrate 200 including the common electrode 230. The short prevention layer 240a may be formed of an insulating material.

Examples of the insulating material may be an acrylic resin, a polystyrene resin, a polyamide resin, a polyimide resin, a polyarylether resin, a heterocyclic polymer resin, a parylene resin, a benzocyclobutyne resin, a polyacrylonitrile resin, or the like.

The short prevention layer 240a may be formed by spray coating, spin coating, slit coating, ink jet printing, or the like.

After the mask M having the transmissive region M1, the transflective region M2, and the blocking region M3 is aligned on the short prevention layer 240a, an exposure process is performed. For example, the mask M may be a halftone mask or a diffraction mask. The transflective region M2 and the blocking region M3 may correspond to the blocking portion of the second substrate 200.

Referring to FIG. 7, the exposed short prevention layer may be developed to form a short prevention member 240 including a cell gap holding part 250. For example, the short prevention member 240 may be an area corresponding to the transflective area M2, and the cell gap maintaining part 250 may be an area corresponding to the blocking area M3. That is, the short prevention member 240 including the cell gap maintaining part 250 may expose the transmission part.

The short prevention member 240 may correspond to a blocking portion of the second substrate 200, that is, the black matrix 210.

Referring to FIG. 8, bonding the first and second substrates 100 and 200 to face each other and forming a liquid crystal layer 260 between the first and second substrates 100 and 200 may be performed. A liquid crystal display device can be manufactured. In this case, the first and second substrates 100 and 200 may stably maintain the cell gap by the cell gap holding part 250.

Therefore, in the embodiment of the present invention, the cell gap maintaining part 250 and the short prevention member 240 may be formed at the same time, thereby reducing the number of processes and lowering the process cost.

9 is a cross-sectional view of a liquid crystal display according to a second embodiment of the present invention. Here, the second embodiment of the present invention has the same configuration as the liquid crystal display device according to the first embodiment of the present invention described above except for the color filter pattern and the short prevention member. Therefore, the second embodiment of the present invention will not be repeated with the first embodiment of the present invention, and the same reference numerals are assigned to the same components.

Referring to FIG. 9, the liquid crystal display according to the second exemplary embodiment of the present invention may be interposed between the first and second substrates 100 and 300 and the first and second substrates 100 and 300 facing each other. The liquid crystal layer 260 is included.

The first substrate 100 includes a transmission portion and a blocking portion. A plurality of wirings and thin film transistors Tr are disposed in the blocking unit. The pixel electrode 130 electrically connected to the thin film transistor Tr is disposed in the transmission part.

The black matrix 310 is disposed on the second substrate 200 corresponding to the blocking unit. The color filter pattern 320 is disposed on the second substrate 200 corresponding to the transmission part. At least a portion of the color filter pattern 320 may overlap the black matrix 330.

The thickness h2 of the color filter pattern 320 overlapping the black matrix 310 may be smaller than the thickness h1 of the color filter pattern 320 disposed on the transmission part. As a result, the step of the color filter pattern 320 overlapped with the black matrix 310 may become uniform or smaller, so that the conductive material is overlapped at the overlapping portion of the black matrix 310 and the color filter pattern 320. It is possible to prevent the pixel electrode 130 and the common electrode 330 to be described later from shorting.

The common electrode 330 is disposed on the second substrate 200 including the black matrix 310 and the color filter pattern 320.

In addition, a cell gap retaining member 340 may be further disposed on the common electrode 330. The cell gap maintaining member 340 may be disposed in an area corresponding to the black matrix 310. That is, the cell gap holding member 340 may correspond to at least one of the gate wiring 101, the data wiring 102, and the thin film transistor Tr.

Thus, as the step formed by the overlap of the black matrix 310 and the color filter pattern 320 is removed or reduced in the embodiment of the present invention, the cell gaps of the first and second substrates 100 and 200 are reduced. Even if it is reduced, short defects between the common electrode 330 and the pixel electrode 130 may be reduced by the conductive foreign matter.

10 to 13 are cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to a second embodiment of the present invention. Here, the manufacturing method of the second embodiment of the present invention is the same as the manufacturing method of the liquid crystal display device according to the first embodiment of the present invention described above except for the color filter pattern and the short prevention member. Therefore, in the manufacturing method of the second embodiment of the present invention, repeated description of the manufacturing method of the first embodiment of the present invention will be omitted, and the same reference numerals are assigned to the same configurations.

Referring to FIG. 10, a second substrate 200 having a blocking portion and a transmission portion defined therein for manufacturing a liquid crystal display is provided. The black matrix 310 is formed in the blocking unit. The color filter resin film 320a is formed on the second substrate 200 including the black matrix 310. The color filter resin film 320a may have a step due to the black matrix 310.

The mask is aligned on the color filter resin film 320a. The mask M aligns the mask M having the transmissive region M1, the transflective region M2, and the blocking region M3, and then performs an exposure process. For example, the mask M may be a halftone mask or a diffraction mask. The blocking region M3 may correspond to the transmissive portion of the second substrate 200. In addition, the transflective area M2 may correspond to an area to overlap with the black matrix 310.

Referring to FIG. 11, the exposed color filter resin film is developed to form a first color filter pattern 320R. In this case, the first color filter pattern 320R has a thickness (T) of the region overlapping with the black matrix 310 compared to the thickness h1 corresponding to the transmissive portion of the second substrate 200 by the mask M. h2) is formed small. As a result, the first color filter pattern 320R may reduce and eliminate a step caused by the black matrix 310.

Referring to FIG. 12, the second and third color filter patterns 320G and 320B are formed as the first color filter pattern 320R is formed. As a result, the steps of the first, second and third color filter patterns 320R, 320G, and 320B may be reduced or eliminated.

Thereafter, the common electrode 330 and the cell gap retaining member 340 are formed on the second substrate including the first, second and third color filter patterns 320R, 320G, and 320B.

Referring to FIG. 13, the first substrate 100 having the thin film transistor Tr and the pixel electrode 130 is bonded to the second substrate 300 and between the first and second substrates 100 and 300. The liquid crystal display device may be manufactured by performing the process of forming the liquid crystal layer 260. In this case, the first and second substrates 100 and 200 may stably maintain the cell gap by the cell gap holding member 340.

Therefore, the pixel electrode 130 and the common electrode are removed by removing the step difference between the color filter patterns 320R, 320G, and 320B by the black matrix 310 using the halftone mask or the diffraction mask in the exemplary embodiment of the present invention. The short defect of 230 may be prevented, and in addition, the cell gap may be reduced, thereby improving response speed and the like.

1 is an enlarged cross-sectional view of a portion of a conventional liquid crystal display.

2 is an enlarged plan view illustrating two adjacent pixels among a plurality of pixels included in the liquid crystal display according to the first exemplary embodiment of the present invention.

3 is a cross-sectional view taken along the line II ′ of FIG. 2.

4 to 8 are cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to a first embodiment of the present invention.

9 is a cross-sectional view of a liquid crystal display according to a second embodiment of the present invention.

10 to 13 are cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to a second embodiment of the present invention.

 (Explanation of reference numerals for the main parts of the drawings)

 100: first substrate 101: gate wiring

 102: data wiring 110: gate insulating film

 120: protective film 130: pixel electrode

 200, 300: second substrate 210, 310: black matrix

 220, 320: color filter pattern 230, 330: common electrode

 240: short prevention member 250: cell gap holding part

 350: cell gap holding member

Claims (9)

A first substrate having a transmission portion and a blocking portion defined therein; A thin film transistor disposed in the blocking unit; A first electrode disposed in the transmission part and electrically connected to the thin film transistor; A second substrate facing the first substrate; A black matrix disposed on the second substrate corresponding to the blocking portion; A color filter pattern overlapping at least a portion of the black matrix and disposed on the second substrate corresponding to the transmission part; A second electrode disposed on a second substrate including the color filter pattern; A short prevention member disposed on the second electrode corresponding to the blocking unit to prevent a short between the first and second electrodes; And And a liquid crystal layer interposed between the first and second electrodes. The method of claim 1, The short prevention member includes a cell gap retaining portion protruding from a portion thereof. The method of claim 1, And the short prevention member corresponds to the black matrix. Providing first and second substrates each having a transmissive portion and a blocking portion defined therein; Forming a thin film transistor on the blocking portion of the first substrate; Forming a first electrode electrically connected to the thin film transistor on the transmission portion of the first substrate; Forming a black matrix on the blocking portion of the second substrate; Forming at least a portion of the black matrix and a color filter pattern on the transmission part of the second substrate; Forming a second electrode on a second substrate including the color filter pattern; Forming a short prevention member on the second electrode corresponding to the blocking part to prevent a short between the first and second electrodes; And And bonding the first and second substrates so that the first and second electrodes face each other and forming a liquid crystal layer between the first and second electrodes. The method of claim 4, wherein And forming a cell gap retaining portion protruding from a portion of the anti-short member in the forming of the anti-short member. The method of claim 5, wherein The short prevention member is formed by performing an exposure and development process using a diffraction mask or a halftone mask. A first substrate having a transmission portion and a blocking portion defined therein; A thin film transistor disposed in the blocking unit; A first electrode disposed in the transmission part and electrically connected to the thin film transistor; A second substrate facing the first substrate; A black matrix disposed on the second substrate corresponding to the blocking portion; A color filter pattern overlapping at least a portion of the black matrix and disposed on the second substrate corresponding to the transmission part; A second electrode disposed on a second substrate including the color filter pattern; And A liquid crystal layer interposed between the first and second electrodes, And a color filter pattern overlapping the black matrix has a smaller thickness than a color filter pattern disposed on the transmission part. Providing first and second substrates each having a transmissive portion and a blocking portion defined therein; Forming a thin film transistor on the blocking portion of the first substrate; Forming a first electrode electrically connected to the thin film transistor on the transmission portion of the first substrate; Forming a black matrix on the blocking portion of the second substrate; Forming at least a portion of the black matrix and a color filter pattern on the transmission part of the second substrate; Forming a second electrode on a second substrate including the color filter pattern; and Bonding the first and second substrates so as to face the first and second electrodes and forming a liquid crystal layer between the first and second electrodes, And a color filter pattern overlapping the black matrix is formed to have a thickness smaller than that of the color filter pattern disposed in the transmission part. The method of claim 8, The color filter pattern is formed by performing exposure and development processes using a halftone mask or a diffraction mask.

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