KR20080078227A - Liquid crystal display and repair method thereof - Google Patents

Abstract

An LCD(Liquid Crystal Display) and a repair method for the same are provided to repair a short-circuited TFT(Thin Film Transistor) efficiently without darkening it by arranging plural repair parts, which are not overlapped with a gate line or a gate electrode, at the source electrode of each TFT. An LCD comprises the first substrate, the second substrate, a gate line(102), a data line(103), a gate electrode(106), the first source electrode(104a), the second source electrode(104b), the third source electrode(104c), a drain electrode(107), a pixel electrode(108), and a liquid crystal layer. The first substrate and the second substrate face each other. The gate line and the data line define a pixel area, crossing each other on the first substrate. The gate electrode is formed at the gate line. The first source electrode is protruded from the data line. The second source electrode, protruded from the first source electrode, has the first repair part, which is not overlapped with the gate electrode, and the first electrode part, which is overlapped with the gate electrode. The third source electrode, protruded from the first source electrode, has the second repair part, which is not overlapped with the gate electrode, and the second electrode part, which is overlapped with the gate electrode. The drain electrode is formed between the second source electrode and the third source electrode. The pixel electrode, formed at the pixel area, is connected with the drain electrode. The liquid crystal layer is formed between the first substrate and the second substrate.

Description

LCD and its repair method {LIQUID CRYSTAL DISPLAY AND REPAIR METHOD THEREOF}

1 is a plan view showing a general liquid crystal display device.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

3A is a cross-sectional view taken along the line II-II ′ of FIG. 1.

3B is a cross-sectional view taken along the line II-II ′ of FIG. 1.

4 is a plan view showing a liquid crystal display device according to a first embodiment of the present invention.

5 is a cross-sectional view taken along the line III-III ′ of FIG. 4.

6 is a plan view illustrating a liquid crystal display according to a second exemplary embodiment of the present invention.

7 and 9 are plan views illustrating a repair method of the liquid crystal display according to the first exemplary embodiment of the present invention.

8 is a cross-sectional view taken along the line IV-IV ′ of FIG. 7.

10 and 11 are plan views illustrating a repairing method of a liquid crystal display according to a second exemplary embodiment of the present invention.

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

102, 202: gate line 103, 203: data line

106 and 206: gate electrode 107 and 207: drain electrode

104: source electrode

104a: first source electrode 104b: second source electrode 104c: third source electrode

204: First source electrode 205: Second source electrode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a repair method thereof, and more particularly, to a liquid crystal display device and a repair method capable of efficiently achieving repair of a thin film transistor.

BACKGROUND ART In general, liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. Accordingly, the liquid crystal display device is widely used as a portable computer such as a notebook PC, office automation equipment, audio / video equipment, and the like.

In general, the liquid crystal display device displays a desired image on a screen by adjusting the amount of light transmitted according to image signals applied to a plurality of control switching elements arranged in a matrix.

The liquid crystal display includes a liquid crystal panel in which a color filter substrate as an upper substrate and a thin film transistor array substrate as a lower substrate are opposed to each other, and a liquid crystal layer is filled therebetween; And a driver for supplying scan signals and image information to the liquid crystal panel to operate the liquid crystal panel.

A color filter layer and a black matrix are formed on the color filter substrate, and a common electrode for driving a liquid crystal is formed together with the following pixel electrode.

In addition, a gate line and a data line are formed on the thin film transistor array substrate vertically and horizontally to define a plurality of pixels, and each pixel is switched by a plurality of pixel electrodes formed in a matrix form and signals of the gate line. A plurality of thin film transistors for transmitting a signal of a data line to each pixel electrode is formed.

In the liquid crystal display, a liquid crystal is driven by an electric field formed between the pixel electrode and the common electrode to display an image.

Hereinafter, a conventional liquid crystal display and a repair method will be described with reference to the accompanying drawings.

FIG. 1 is a plan view illustrating a general liquid crystal display, and only two pixels are shown for convenience of description.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1, illustrating a gate electrode, a source electrode, a drain electrode, and the like.

FIG. 3A is a cross-sectional view taken along the line II-II ′ of FIG. 1 and illustrates a short circuit generated between the source electrode and the drain electrode.

FIG. 3B is a cross-sectional view taken along the line II-II ′ of FIG. 1 and illustrates a short circuit generated between the source electrode and the gate electrode.

As shown in FIG. 1, a general liquid crystal display device includes a first substrate 1 and a second substrate (not shown), and a gate line intersecting with each other on the first substrate 1 to define a pixel region. 2) and data line 3 are formed. Pixel electrodes 8 are formed in the pixel regions, and thin film transistors are formed at portions where the gate lines 2 and the data lines 3 cross each other so that the thin film transistors are connected to the signals of the gate lines 2. Accordingly, the data signal of the data line 3 is applied to each pixel electrode 8. The thin film transistor may include a gate electrode 6 formed on the gate line 2, a source electrode 4 protruding from the data line 3, and overlapping with one side of the gate electrode 6, and the source electrode ( A drain electrode 7 overlapping the other side of the gate electrode 6 at a predetermined distance from the gate electrode 6, and positioned above the gate electrode 6 and positioned below the source electrode 4 and the drain electrode 7. And a semiconductor layer 13.

The semiconductor layer 13 is formed by depositing an amorphous silicon layer 11 on the bottom and an n + layer 12 on the top. In addition, a gate insulating film 10 is formed on the entire surface of the first substrate 1 including the gate line 2 and the gate electrode 6.

In addition, a passivation layer including a hole 15 in a predetermined portion of the drain electrode 7 is disposed on the data line 3 including the semiconductor layer 13, the source electrode 4, and the drain electrode 7. 14) is formed.

Here, the gate electrode 6 is a portion overlapping with the source electrode 4 and the drain electrode 7 of the gate line 2, the gate electrode 6 may be formed to protrude from the gate line 2. do.

In the liquid crystal display device having such a structure, foreign matter or electrostatic phenomenon occurs between the source electrode 4 and the drain electrode 7 during the manufacturing process of the liquid crystal display device, so that the source electrode (A or B shown in FIG. There is a problem that a short occurs between 4) and the drain electrode 7.

In addition, foreign matter or static electricity is generated between the source electrode 4 and the gate electrode 6 during the manufacturing process of the liquid crystal display due to the heel-lock phenomenon, so that the source electrode (C or D shown in FIG. There is a problem that a short occurs between 4) and the gate electrode 6.

When a short occurs between the source electrode 4 and the drain electrode 7 of the thin film transistor as described above, the source electrode 4 or the drain electrode 7 is cut by means of a laser or the like to darken the thin film transistor. The repairing method is used.

In addition, when a short occurs between the source electrode 4 and the gate electrode 6 of the thin film transistor as described above, the source electrode 4 is cut by means of a laser or the like and repaired by darkening the thin film transistor. Is used.

The conventional general repair method is a method of darkening the thin film transistor and not using the thin film transistor in which a defect has occurred, thus reducing the screen quality of the liquid crystal display device.

Accordingly, it is an object of the present invention to provide a liquid crystal display device and a repair method capable of achieving a repair of a thin film transistor efficiently by providing a repair portion at a source electrode of a thin film transistor.

According to an embodiment of the present invention, a liquid crystal display device includes: a first substrate and a second substrate facing each other; A gate line and a data line crossing each other on the first substrate to define a pixel area; A gate electrode formed on the gate line; A first source electrode protruding from the data line; A second source electrode protruding from the first source electrode and having a first repair portion not overlapping with the gate electrode and a first electrode portion overlapping with the gate electrode; A third source electrode protruding from the first source electrode and having a second repair portion not overlapping with the gate electrode and a second electrode portion overlapping with the gate electrode; A drain electrode formed between the second source electrode and the third source electrode; A pixel electrode formed in the pixel area and connected to the drain electrode; And a liquid crystal layer formed between the first substrate and the second substrate.

In addition, the liquid crystal display device according to another preferred embodiment of the present invention, the first substrate and the second substrate facing each other; A gate line and a data line crossing each other on the first substrate to define a pixel area; A gate electrode formed on the gate line; A first source electrode protruding from the data line and having a first repair portion not overlapping with the gate electrode and a first electrode portion overlapping with the gate electrode; A second source electrode protruding from the data line and having a second repair portion not overlapping with the gate electrode and a second electrode portion overlapping with the gate electrode; A drain electrode formed between the first source electrode and the second source electrode; A pixel electrode formed in the pixel area and connected to the drain electrode; And a liquid crystal layer formed between the first substrate and the second substrate.

Hereinafter, a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a plan view illustrating a liquid crystal display according to a first exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating a cross section taken along line III-III ′ of FIG. 4.

6 is a plan view illustrating a liquid crystal display according to a second exemplary embodiment of the present invention.

7 and 9 are plan views illustrating a repair method of a liquid crystal display according to a first exemplary embodiment of the present invention. FIG. 7 shows a repaired state by cutting the first repair portion, and FIG. 9 shows a repaired portion by the second repair portion. The repaired figure is shown.

FIG. 8 is a cross-sectional view taken along the line IV-IV ′ of FIG. 7.

10 and 11 are plan views illustrating a repairing method of a liquid crystal display according to a second exemplary embodiment of the present invention. FIG. 10 shows a repaired state by cutting the first repair unit, and FIG. 11 shows a repaired process by cutting the second repair unit. The repaired figure is shown.

Hereinafter, the structure and manufacturing method of the liquid crystal display device according to the first and second embodiments of the present invention will be described.

First, the structure of the liquid crystal display according to the first embodiment of the present invention will be described with reference to FIG. 4.

As shown in FIG. 4, the liquid crystal display according to the first embodiment of the present invention includes: a first substrate (see 101 in FIG. 5) and a second substrate (not shown) facing each other; A gate line 102 and a data line 103 intersecting each other on the first substrate 101 to define a pixel area; A gate electrode 106 formed on the gate line 102; A first source electrode 104a protruding from the data line 103; A second source electrode 104b protruding from the first source electrode 104a and having a first repair portion not overlapping with the gate electrode 106 and a first electrode portion overlapping with the gate electrode 106; A third source electrode 104c protruding from the first source electrode 104a and having a second repair portion not overlapping with the gate electrode 106 and a second electrode portion overlapping with the gate electrode 106; A drain electrode 107 formed between the second source electrode 104b and the third source electrode 104c; A pixel electrode 108 formed in the pixel region and connected to the drain electrode 107; And a liquid crystal layer (not shown) formed between the first substrate 101 and the second substrate.

As shown in FIG. 4, the gate electrode 106 is a region overlapping the source electrode 104 and the drain electrode 107 among the gate lines 102, and the gate electrode 106 is formed from the gate line 102. It may be formed to protrude.

As shown in FIG. 4, the source electrode 104 protrudes from the data line 103 and has a bifurcated shape, and includes a first source electrode 104a, a second source electrode 104b, and a third source. It consists of the source electrode 104c.

The first source electrode 104a has a shape protruding from the data line 103, and the first source electrode 104a protrudes from an area where the data line 103 does not overlap with the gate line 102. It extends to an area not overlapping with the gate line 102 or the gate electrode 106.

The second source electrode 104b protrudes from the first source electrode 104a and does not overlap the gate electrode 106, and extends from the first repair part and extends from the gate electrode 106. And a first electrode portion overlapping with each other.

The third source electrode 104c may include a second repair portion extending from the first source electrode 104a and not overlapping with the gate electrode 106 and a gate electrode 106 extending from the second repair. And a second electrode portion overlapping with each other.

Since the first and second repair parts, which are part of the second and third source electrodes, do not overlap with the gate electrode 106, when a short occurs between the source electrode 104 and the drain electrode 107 or when the source occurs. When a short occurs between the electrode 104 and the gate electrode 106, the repairing operation can be easily performed by cutting the first repair portion or the second repair portion without affecting the gate electrode 106. .

4 and 5, a manufacturing method of the liquid crystal display according to the first embodiment of the present invention as described above will be briefly described.

First, a metal material is entirely deposited on the first substrate 101, and then selectively removed to form a gate line 102 including the gate electrode 106.

Thereafter, the gate insulating layer 110 is entirely deposited on the first substrate 101 on which the gate line 102 and the gate electrode 106 are formed.

Subsequently, metals for the amorphous silicon layer 111, the n + layer 112, and the source electrode / drain electrodes 104 and 107 are sequentially deposited on the gate insulating layer 110.

Thereafter, the metal for the source electrode 104, the drain electrode 107, the n + layer 112, and the amorphous silicon layer 111 are selectively removed to cover the gate electrode 106, and each layer is a semiconductor layer. Leave as much as width for the formation of 113.

Thereafter, the metal and n + layer 112 for the source electrode / drain electrodes 104 and 107 corresponding to the upper portion of the channel are removed.

Through this process, the semiconductor layer 113 in which the amorphous silicon layer 111 and the n + layer 112 are sequentially stacked, the gate line 102 and the data line 103, and the gate electrode formed on the gate line 102 are formed. 106 and a source electrode 104 protruding from the data line 103 and divided into at least two branches, and a drain electrode 107 positioned between the two divided source electrodes 104 is formed. Here, the first and second repair parts are formed in the source electrode 104.

The first and second repair parts do not overlap with the gate electrode 106.

Thereafter, a protective layer 114 is deposited on the data line 103 including the semiconductor layer 113, the source electrode 104, and the drain electrode 107.

Thereafter, a hole 115 is formed in the passivation layer 114 to expose an upper portion of the drain electrode 107.

Thereafter, the hole 115 formed in the passivation layer 114 is filled, and the transparent electrode is entirely deposited on the passivation layer 114 and then selectively removed to form the pixel electrode 108.

Next, the structure of the liquid crystal display according to the second embodiment of the present invention will be described.

As shown in FIG. 6, a liquid crystal display according to a second exemplary embodiment of the present invention includes a first substrate (not shown) and a second substrate (not shown) facing each other; A gate line 202 and a data line 203 intersecting each other on the first substrate to define a pixel area; A gate electrode 206 formed on the gate line 202; A first source electrode 204 protruding from the data line 203 and having a first repair portion not overlapping with the gate electrode 206 and a first electrode portion overlapping with the gate electrode; A second source electrode 205 protruding from the data line 203 and having a second repair portion not overlapping with the gate electrode 206 and a second electrode portion overlapping with the gate electrode 206; A drain electrode 207 formed between the first source electrode 204 and the second source electrode 205; A pixel electrode 208 formed in the pixel region and connected to the drain electrode 207; And a liquid crystal layer (not shown) formed between the first substrate and the second substrate.

As shown in FIG. 6, the gate electrode 206 is an area of the gate line 202 overlapping the source electrodes 204 and 205 and the drain electrode 207, and the gate electrode 206 is a gate line ( It may be formed to protrude from 202.

As illustrated in FIG. 6, the source electrodes 204 and 205 may include a first source electrode 204 and a second source electrode 205 protruding from the data line 203, respectively.

The first source electrode 204 may include a first repair part that protrudes from an area in which the data line 203 does not overlap the gate line 202 and does not overlap the gate line 202 or the gate electrode 206. The first electrode part extends from the first repair part and overlaps the gate electrode 206.

The second source electrode 205 may include a second repair part protruding from an area where the data line 203 does not overlap the gate line 202 and not overlapping the gate line 202 or the gate electrode 206. The second electrode part extends from the second repair part and overlaps the gate electrode 206.

Since the first repair part and the second repair part which are part of the first source electrode 204 and the second source electrode 205 do not overlap with the gate electrode 206, the source electrodes 204 and 205 and the drain electrode are not overlapped with each other. When the short occurs between 207 or when the short occurs between the source electrodes 204 and 205 and the gate electrode 206, the repair work is performed by cutting the first repair part or the second repair part. It can be performed easily without affecting 206.

The manufacturing method of the liquid crystal display device according to the second embodiment of the present invention as described above is the same as the manufacturing method of the liquid crystal display device according to the first embodiment except for the shapes of the source electrodes 204 and 205. Description is omitted.

A method of manufacturing a liquid crystal display device according to a second embodiment of the present invention is as follows.

First, a gate line 202 is formed on a first substrate (not shown), and then a gate insulating film (not shown) is entirely deposited on the first substrate. Next, a semiconductor layer (not shown) including an amorphous silicon layer and an n + layer, and source electrodes 204 and 205 and a drain electrode 207 are formed on the first substrate. Here, the source electrodes 204 and 205 are composed of first and second source electrodes 204 and 205 including first and second repair parts.

Hereinafter, a repair method of the liquid crystal display device according to the first and second embodiments of the present invention will be described.

First, the repairing method of the liquid crystal display according to the first exemplary embodiment of the present invention will be described with reference to FIGS. 7 to 8.

When a short occurs between the second source electrode 104b and the drain electrode 107 protruding from the first source electrode 104a as shown in FIG. 7, or the first source as shown in F shown in FIG. 7. When a short occurs between the second source electrode 104b and the gate electrode 106 protruding from the electrode 104a, the repair is performed by cutting the first repair portion of the second source electrode 104b as shown in FIG. do.

That is, the repair is performed by cutting the first repair portion of the second source electrode 104b using a cutting means such as a laser as in the N region shown in FIG. In this case, the laser may perform the operation of cutting the first repair part through the first substrate 101. Therefore, the repair operation may be applied at any time after the manufacturing process or completion of the liquid crystal display.

In this case, since the first repair part does not overlap the gate line 102 or the gate electrode 106, the first repair part does not affect the gate line 102 or the gate electrode 106 during the repair process of cutting the first repair part.

In addition, since the third source electrode 104c remains in the second source electrode 104b and the third source electrode 104c after the first repair part is cut as described above, the thin film transistor operates normally.

Then, when a short occurs between the third source electrode 104c and the drain electrode 107 protruding from the first source electrode 104a as shown in FIG. 9, or as shown in H as shown in FIG. 9. When a short occurs between the third source electrode 104c protruding from the first source electrode 104a and the gate electrode 106, as shown in FIG. 9, the second repair portion of the third source electrode 104c is cut off. I repair it by doing it. Here, the operation of cutting the second repair part is made of cutting means such as a laser, and the laser may perform the operation of cutting the second repair part by passing through the first substrate (see 101 in FIG. 8). The repair operation may be applied at any time after the manufacturing process or completion of the liquid crystal display.

Here, since the second repair part does not overlap the gate line 102 and the gate electrode 106, the second repair part does not affect the gate line 102 or the gate electrode 106 during the repair process of cutting the second repair part.

In addition, since the second source electrode 104b remains in the second source electrode 104b and the third source electrode 104c after the second repair part is cut as described above, the thin film transistor operates normally.

Next, a repair method of the liquid crystal display according to the second exemplary embodiment of the present invention will be described with reference to FIGS. 10 and 11.

When a short occurs between the first source electrode 204 and the drain electrode 207 as shown in FIG. 10, or when the first source electrode 204 and the gate electrode 206 as shown in FIG. In the case where a short circuit occurs, repair is performed by cutting the first repair portion of the first source electrode 204 as shown in FIG.

Here, since the first repair portion does not overlap the gate line 202 or the gate electrode 206, the first repair portion does not affect the gate line 202 or the gate electrode 206 during the repair process of cutting the first repair portion.

In addition, since the second source electrode 205 remains in the first and second source electrodes 204 and 205 after the first repair part is cut as described above, the thin film transistor is normally operated.

Then, when a short occurs between the second source electrode 205 and the drain electrode 207 as shown in FIG. 11, or as shown in M in FIG. 11, the second source electrode 205 and the gate electrode ( In the case where a short occurs between 206, the repair is performed by cutting the second repair portion of the second source electrode as shown in FIG.

Here, since the second repair portion does not overlap the gate line 202 or the gate electrode 206, the second repair portion does not affect the gate line 202 or the gate electrode 206 during the repair process of cutting the second repair portion.

In addition, since the first source electrode 204 remains in the first and second source electrodes 204 and 205 after the second repair part is cut as described above, the thin film transistor operates normally.

The repair method of the liquid crystal display device according to the second embodiment of the present invention is also made using a cutting means such as a laser, as in the repair method of the liquid crystal display device according to the first embodiment described above. Since the laser may perform the operation of cutting the first repair portion or the second repair portion through the first substrate, the repair operation may be applied at any time after the manufacturing process or completion of the liquid crystal display device.

As described in detail above, the present invention provides a plurality of repair parts that do not overlap the gate line or the gate electrode in the source electrode of the thin film transistor, so that the thin film transistor in which the short has occurred may be repaired in a manner that does not darken. There are advantages to it.

 Therefore, the thin film transistor which has been repaired due to the occurrence of a short operation normally operates despite the repair operation, thereby increasing the screen display quality of the liquid crystal display and minimizing the defective rate of the liquid crystal display.

In addition, the repair method of the liquid crystal display device according to the present invention is performed through a cutting means such as a laser, there is an advantage that can be applied at any time after the manufacturing process or completion of the liquid crystal display device.

Claims (10)

Preparing a first substrate and a second substrate; Forming a gate electrode on the first substrate; Forming a semiconductor layer on the first substrate; A first source electrode protruding from the data line, a first repair portion protruding from the first source electrode and not overlapping the gate electrode, and a first electrode portion overlapping the gate electrode on the first substrate; A third source electrode having a second source electrode, a second repair portion protruding from the first source electrode and not overlapping the gate electrode, and a second electrode portion overlapping the gate electrode, and the second source electrode and the third source electrode; Forming a drain electrode located between the source electrodes; When a short occurs between the second source electrode and the drain electrode or between the second source electrode and the gate electrode, the first repair part is cut, and between the third source electrode and the drain electrode or between the third source electrode and the gate electrode. Cutting a second repair part when a short occurs; Method of manufacturing a liquid crystal display device comprising a. The method of claim 1, wherein before or after the step of cutting the first repair portion or the second repair portion, And forming a liquid crystal layer between the first substrate and the second substrate. Preparing a first substrate and a second substrate; Forming a gate electrode on the first substrate; Forming a semiconductor layer on the first substrate; A first source electrode protruding from the data line on the first substrate and not overlapping with the gate electrode, and a first source electrode having a first electrode portion overlapping with the gate electrode, and protruding from the data line; Forming a second source electrode having a second repair portion which does not overlap with a second electrode portion and a second electrode portion overlapping with the gate electrode, and a drain electrode positioned between the first source electrode and the second source electrode; When a short occurs between the first source electrode and the drain electrode, or between the first source electrode and the gate electrode, the first repair part is cut, and between the second source electrode and the drain electrode or between the second source electrode and the gate electrode. Cutting a second repair part when a short occurs; Method of manufacturing a liquid crystal display device comprising a. The method of claim 3, wherein before or after the step of cutting the first repair portion or the second repair portion, And forming a liquid crystal layer between the first substrate and the second substrate. Forming a gate electrode; Forming a semiconductor layer; A second source electrode formed with a source electrode protruding from the data line, a first repair portion protruding from the first source electrode and not overlapping with the gate electrode, and a first electrode portion overlapping with the gate electrode; A third source electrode protruding from the source electrode and not overlapping with the gate electrode, a third source electrode having a second electrode portion overlapping with the gate electrode, and a drain positioned between the second source electrode and the third source electrode Forming an electrode; When a short occurs between the second source electrode and the drain electrode or between the second source electrode and the gate electrode, the first repair part is cut, and between the third source electrode and the drain electrode or between the third source electrode and the gate electrode. Cutting a second repair part when a short occurs; Thin film transistor repair method of a liquid crystal display comprising a. The thin film transistor repair method of claim 5, wherein the first repair portion or the second repair portion is cut by a laser. Forming a gate electrode; Forming a semiconductor layer; A first source electrode protruding from the data line and not overlapping with the gate electrode, a first source electrode having a first electrode portion overlapping with the gate electrode, and a second protruding from the data line and not overlapping with the gate electrode Forming a second source electrode having a repair portion and a second electrode portion overlapping the gate electrode, and a drain electrode positioned between the first source electrode and the second source electrode; When a short occurs between the first source electrode and the drain electrode, or between the first source electrode and the gate electrode, the first repair part is cut, and between the second source electrode and the drain electrode or between the second source electrode and the gate electrode. Cutting a second repair part when a short occurs; Thin film transistor repair method of a liquid crystal display comprising a. 8. The thin film transistor repair method of claim 7, wherein the first repair portion or the second repair portion is cut by a laser. A first substrate and a second substrate facing each other; A gate line and a data line crossing each other on the first substrate to define a pixel area; A gate electrode formed on the gate line; A first source electrode protruding from the data line; A second source electrode protruding from the first source electrode and having a first repair portion not overlapping with the gate electrode and a first electrode portion overlapping with the gate electrode; A third source electrode protruding from the first source electrode and having a second repair portion not overlapping with the gate electrode and a second electrode portion overlapping with the gate electrode; A drain electrode formed between the second source electrode and the third source electrode; A pixel electrode formed in the pixel area and connected to the drain electrode; And A liquid crystal layer formed between the first substrate and the second substrate; Liquid crystal display device comprising a. A first substrate and a second substrate facing each other; A gate line and a data line crossing each other on the first substrate to define a pixel area; A gate electrode formed on the gate line; A first source electrode protruding from the data line and having a first repair portion not overlapping with the gate electrode and a first electrode portion overlapping with the gate electrode; A second source electrode protruding from the data line and having a second repair portion not overlapping with the gate electrode and a second electrode portion overlapping with the gate electrode; A drain electrode formed between the first source electrode and the second source electrode; A pixel electrode formed in the pixel area and connected to the drain electrode; And A liquid crystal layer formed between the first substrate and the second substrate; Liquid crystal display device comprising a.

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