KR100963414B1 - Liquid Crystal Display Device And Fabricating Method thereof - Google Patents

Abstract

The present invention relates to a liquid crystal display device and a method of manufacturing the same that can be easily repaired when the link is opened.

The present invention is a signal line; A signal pad for supplying a driving signal to the signal line;

A signal link connecting the signal pad and the signal line and formed in a zigzag shape according to a connection position thereof; And a repair pattern formed to intersect the signal link with the signal link and the insulating layer interposed therebetween and connected to the signal link by a light beam during repair.

Description

Liquid crystal display device and its manufacturing method {Liquid Crystal Display Device And Fabricating Method             

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

FIG. 2 is an enlarged plan view of a link of the liquid crystal display shown in FIG. 1; FIG.

3 is a plan view showing a liquid crystal display device according to the present invention.

4 is a cross-sectional view of the data link unit shown in FIG. 3;

FIG. 5 is a cross-sectional view of the gate link unit illustrated in FIG. 3. FIG.

6 is a view for explaining the repair when the gate link is opened.

7 is a view for explaining the repair when the data link is opened.

        <Description of Symbols for Main Parts of Drawings>

2,102: liquid crystal panel 4,104: lower substrate

6,106: Upper substrate 8,108: Thin film transistor

10,110: gate pad 12,112: data pad

The present invention relates to a liquid crystal display device and a method for manufacturing the same, and more particularly, to a liquid crystal display device and a method for manufacturing the same that can be easily repaired when the link unit is opened.

In general, liquid crystal displays are flat panel displays having advantages of small size, thinness, and low power consumption. Such liquid crystal displays are used as notebook PCs, office automation devices, audio / video devices, and the like. In particular, an active matrix type liquid crystal display device using a thin film transistor (hereinafter referred to as "TFT") as a switch element is suitable for displaying a dynamic image.

An active matrix type liquid crystal display device displays an image corresponding to a video signal such as a television signal on a pixel element (Picture Element Matrix or Pixel Matrix) in which pixels are arranged at intersections of gate lines and data lines, respectively. Done.

Each of the pixels includes a liquid crystal cell that adjusts the amount of transmitted light according to the voltage level of the data signal from the data line.

The thin film transistor is installed at the intersection of the gate lines and the data lines to switch the data signal to be transmitted toward the liquid crystal cell in response to the scan signal from the gate line.

1 is a plan view of a conventional liquid crystal display device.

Referring to FIG. 1, the liquid crystal panel includes a non-display portion positioned outside the image display portion having the liquid crystal cell matrix. On the lower substrate 4 of the image display unit, data lines 45 to which a data signal is applied and gate lines 35 to which a gate signal is applied are arranged to cross each other, and a thin film transistor (not shown) formed at an intersection thereof. ) And a liquid crystal cell connected to the thin film transistor are formed.

On the upper substrate 6 of the image display unit, color filters separated and applied to each cell region by a black matrix and a common electrode are formed on the surface of the color filters. The upper and lower substrates 6 and 4 are spaced apart by spacers to provide a cell gap, and the cell gap is filled with a liquid crystal material.

The lower substrate 4 of the non-display portion is provided with a gate pad 10 and a data pad 12.

The gate pad 10 supplies a gate signal supplied from a gate driving integrated circuit (not shown) to the gate lines 35 through the gate link 33. The gate link 33 is formed together with the gate pad 10 and the gate lines 35 as a connection portion of the gate pad 10 and the gate lines 35.

The data pad 12 supplies a data signal supplied from a data driving integrated circuit (not shown) to the data lines 45 through the data link 43. The data link 43 is formed together with the data pad 12 and the data lines 45 as a connection portion of the data pad 12 and the data lines 45.

As the number of liquid crystal cells is increased to realize a high resolution image, the widths and spacings of the gate lines 35 and the data lines 45 become minute. In addition, in the small liquid crystal display device, the spacing between the pads 10 and 12 is remarkably reduced as the integration degree of the driving circuit increases for miniaturization. Accordingly, the links 33 and 43 connected between the pads 10 and 12 and the signal lines are set to have different lengths according to their positions. That is, in order to connect the pads 10 and 12 having relatively narrow spacing and the signal lines having a relatively wide spacing, the links 33 and 43 have different lengths according to their positions. However, since the links 33 and 43 have different lengths, resistance differences are generated between the links 33 and 43. In order to compensate for such a resistance difference, as shown in FIG. 2, zigzag-shaped links 33 and 43 in which a relatively short central link LKc has a zigzag shape have been proposed.

However, as the number of channels of the data driving circuit and the gate driving circuit increases, the pad pitch of the links 33 and 43 decreases. As the pad pitch of the links 33 and 43 is reduced, the line widths of the links 33 and 43 are also gradually reduced to prevent a short between each link 33 and 43 which may occur. However, as the line widths of the links 33 and 43 are reduced, defects A such as opening of the link electrodes frequently occur.

Accordingly, an object of the present invention is to provide a liquid crystal display device and a method for manufacturing the same, which can be easily repaired when a link is opened.

In order to achieve the above object, the liquid crystal display device according to the present invention comprises a signal line; A signal pad for supplying a driving signal to the signal line; A signal link connecting the signal pad and the signal line and formed in a zigzag shape according to a connection position thereof; And a repair pattern formed to intersect the signal link with the signal link and the insulating layer interposed therebetween and connected to the signal link by a light beam during repair.

The signal line is characterized in that the gate line.

The signal line is characterized in that the data line.

And an active layer and an ohmic contact layer formed under the data line.

The repair pattern may be formed of the same material as the gate line.

The repair pattern may be formed of the same material as the data line.

The method may further include an active layer and an ohmic contact layer formed under the repair pattern.

And a protective film formed to cover the signal link and the repair pattern.

A method of manufacturing a liquid crystal display panel according to the present invention includes a signal line including gate lines and data lines, a signal pad for supplying a driving signal to the signal line, and a signal link connecting the signal pad and the signal line. A method of manufacturing a liquid crystal display device, the method comprising: forming a repair pattern that is insulated from the signal link and intersects with the signal link to be connected to the signal link by a light beam during repair.

The repair pattern is formed at the same time as the gate line.

The repair pattern may be formed at the same time as the data line.

The forming of the repair pattern may further include forming an active layer and an ohmic contact layer under the repair pattern.

The signal link is formed at the same time as the gate line.

The signal link is formed at the same time as the data line.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 7.

3 is a plan view illustrating a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the liquid crystal panel according to the exemplary embodiment of the present invention includes a non-display unit positioned outside the image display unit having the liquid crystal cell matrix. On the lower substrate 104 of the image display unit, data lines 145 to which a video signal is applied and gate lines 135 to which a gate signal is applied are arranged to cross each other, and a thin film transistor (not shown) formed at an intersection thereof. And liquid crystal cells connected to the thin film transistor.

On the upper substrate 106 of the image display unit, color filters separated and applied to each cell region by a black matrix are formed, and a common electrode is formed on the surface of the color filters. The upper and lower substrates 106 and 104 are spaced apart by spacers to provide a cell gap, and the cell gap is filled with a liquid crystal material.

The non-display portion includes a gate pad 110 extending from the gate line 135 and a data pad 112 extending from the data line 145.

The gate pad 110 supplies a gate signal supplied from a gate driving integrated circuit (not shown) to the gate lines 135 through the gate link 85 included in the gate link unit 85.

As shown in FIG. 4, the gate link unit 85 includes a gate link 133 and a gate repair pattern 83 formed to overlap the gate link 133 and the gate insulating layer 67 therebetween. . The gate link unit 85 further includes an active layer 27 and an ohmic contact layer 28 under the gate repair pattern 83. The passivation layer 69 is formed on the gate repair pattern 83.

The gate link 133 is formed in a different form according to a position corresponding to an output terminal of a gate driving integrated circuit (not shown). That is, the gate link 133 corresponding to the outer output terminal of the gate driving integrated circuit is formed in a straight line shape, and the gate link 133 corresponding to the central output terminal of the gate driving integrated circuit crosses the gate repair pattern 83. It is formed in a zigzag form.

The gate repair pattern 83 repairs the opening of the gate link 133 when a defect such as an open occurs in the gate link 133. That is, when a repair is necessary due to an opening occurring in the gate link 133, as shown in FIG. 6, the laser beam is irradiated to the gate repair pattern 83 to generate the gate link 133 and the gate repair pattern 83. Short circuit.

The data pad 112 supplies a data signal supplied from a data driving integrated circuit (not shown) to the data lines 145 through the data link 143 included in the data link unit 75.

As illustrated in FIG. 5, the data link unit 75 includes a data link 143 and a data repair pattern 73 formed to overlap each other with the data link 143 and the gate insulating layer 67 interposed therebetween. . The data link unit 75 further includes an active layer 27 and an ohmic contact layer 28 under the data link 143. The passivation layer 69 is formed on the data link 143.

The data link 143 is formed in a different form depending on a position corresponding to an output terminal of a data driving integrated circuit (not shown). That is, the data link 143 corresponding to the outer output terminal of the data driving integrated circuit is formed in a straight line shape, and the data link 143 corresponding to the central output terminal of the data driving integrated circuit crosses the data repair pattern 73. It is formed in a zigzag form.

The data repair pattern 73 repairs the opening of the data link 143 when a defect such as an open occurs in the data link 143. That is, in the case where an open occurs in the data link 143 and a repair is required, the data repair pattern 73 and the data link 143 are short-circuited by irradiating a laser on the data link 143 as shown in FIG. 7. do.                     

A method of manufacturing the gate link unit 85 and the data link unit 75 will be described with reference to FIGS. 4 and 5 as follows.

The gate metal layer is formed on the substrate through a deposition method such as a sputtering method. Subsequently, the gate metal layer is patterned by a photolithography process and an etching process using a mask. As a result, the data repair pattern 73 and the gate link 133 are formed. As the gate metal, chromium (Cr), molybdenum (Mo), aluminum-based metal, etc. are used in a single layer or a double layer structure.

The gate insulating layer 67 is entirely deposited on the substrate on which the data repair pattern 73 and the gate link GLK are formed. As the material of the gate insulating film 67, an inorganic insulating material such as silicon oxide (SiOx) or silicon nitride (SiNx) is used.

An amorphous silicon layer, an n + amorphous silicon layer, and a source / drain metal layer are sequentially formed on the substrate on which the gate insulating layer 67 is formed. Thereafter, the data link 143 and the gate repair pattern 83 are formed on the source / drain metal layer by a photolithography process and an etching process using a mask. Molybdenum (Mo), titanium, tantalum, molybdenum alloy (Mo alloy), etc. are used as a source / drain metal.

As described above, the liquid crystal display panel according to the exemplary embodiment of the present invention forms the repair patterns 73 and 83 on at least one of the upper and lower portions of the links 133 and 143. Thus, when the opening of the links 133 and 143 occurs, the repair is prevented by short-circuiting the repair patterns 73 and 83 and the links 133 and 143.

As described above, the liquid crystal display device according to the present invention and a method of manufacturing the same by forming a repair pattern on at least one of the upper and lower portions of the link, and when the link is open, irradiates a laser to short-circuit the repair pattern and the link. It can be repaired easily.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (14)

A liquid crystal panel comprising a display unit for displaying an image having a plurality of signal lines and a non-display unit positioned at an edge of the display unit and not displaying an image; A signal pad positioned on the non-display unit and supplying driving signals to the plurality of signal lines; A signal link positioned in the non-display portion and connected to the signal pad and the signal line and formed in a zigzag shape according to a connection position thereof; And a repair pattern formed to intersect the signal link with the signal link and the insulating layer interposed therebetween and connected to the signal link by a light beam during repair. The method of claim 1, And the signal lines are gate lines. The method of claim 1, And the plurality of signal lines are data lines. The method of claim 3, wherein And an active layer and an ohmic contact layer formed under the data line. The method of claim 1, And the repair pattern is formed of the same material as the gate line. The method of claim 1, The repair pattern is formed of the same material as the data line. The method of claim 6, The liquid crystal display device further comprises an active layer and an ohmic contact layer formed under the repair pattern. delete A plurality of signal lines including gate lines and data lines arranged therein, the liquid crystal panel divided into a display unit displaying an image and a non-display unit positioned at an edge of the display unit and not displaying an image; And a plurality of signal pads for supplying a driving signal to a plurality of signal lines, and a signal link positioned in the non-display portion and connected to the signal pads and the signal lines and formed in a zigzag shape according to the connection position thereof. In the manufacturing method, And forming a repair pattern that is insulated from the signal link and intersects with the signal link to be connected to the signal link by a light beam during repair. The method of claim 9, And the repair pattern is formed at the same time as the gate line. The method of claim 9, And the repair pattern is formed at the same time as the data line. The method of claim 9, Forming the repair pattern is And forming an active layer and an ohmic contact layer under the repair pattern. The method of claim 9, And the signal link is formed at the same time as the gate line. The method of claim 9, And the signal link is formed at the same time as the data line.

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