KR20050121482A - Array substrate for liquid crystal display device by separately driving and method of fabricating the same - Google Patents

Abstract

The present invention relates to an array substrate for a split driving liquid crystal display device.

Conventional split-driven liquid crystal display array substrates have data lines separated from each other by a predetermined interval on the gate lines which are boundary of the upper and lower portions, and between one end of each data line formed separately from the upper and lower display portions due to the line width limitation of the gate lines. It is difficult to secure sufficient space spaced apart from each other. Due to the problem of narrow space, the upper and lower data wires are likely to be short, and the short circuit between the upper and lower data wires has been found. Even so, there is a difficulty in repairing it.

However, the present invention prevents shorting of the upper and lower data lines by forming holes in the gate lines formed at the boundary of the image division, and further, even if a short occurs, it is already shorted by a later process. An array substrate for a divided drive liquid crystal display device having a structure in which part is easily disconnected is provided.

Description

Array substrate for liquid crystal display device and its manufacturing method {Array substrate for liquid crystal display device by separately driving and method of fabricating the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to an array substrate for a split drive liquid crystal display device for preventing short circuit of data lines.

Recently, as the information society has progressed rapidly, a display field for processing and displaying a large amount of information has been developed.

In particular, in order to meet the times of thinning, light weight, and low power consumption, there is a need for a flat panel display, and accordingly, a thin film transistor liquid crystal device having excellent color reproducibility and thinness is developed. crystal displays have been developed.

The display method of the liquid crystal display device uses optical anisotropy and polarization properties of liquid crystal molecules, which are artificially thin and long and have a pretilt angle having directionality in the arrangement thereof. When voltage is applied to the liquid crystal, the direction of alignment of the liquid crystal molecules can be controlled by changing the inclination angle of the liquid crystal molecules. Therefore, by applying an appropriate voltage to the liquid crystal layer, the alignment direction of the liquid crystal molecules is arbitrarily adjusted to adjust the molecular arrangement of the liquid crystal. The desired image information is expressed by randomly modulating the light polarized by the optical anisotropy of the liquid crystal.

Currently, an active matrix LCD in which a thin film transistor and pixel electrodes connected to the thin film transistor are arranged in a matrix manner is attracting the most attention due to its excellent resolution and ability to implement video.

A liquid crystal display device will be described in more detail with reference to the drawings.

1 schematically shows a general liquid crystal display device.

As illustrated, a general liquid crystal display device 1 includes a black matrix 7 formed between a color filter 10 and each of the color filters 10 on the transparent substrate 5, and the color filters 10 and black. On the upper substrate on which the common electrode 15 deposited below the matrix 7 is formed, the pixel region P defined by the intersection of the gate wiring 24 and the data wiring 30, and on the pixel region P. And a lower substrate formed of the pixel electrode 35 and the switching element Tr. The liquid crystal 40 is filled between the upper substrate and the lower substrate more precisely between the common electrode 15 and the pixel electrode 35. .

A general liquid crystal display device having the above structure applies an image signal to a data line in a data driver in order to display each pixel. Then, by sequentially applying a specific voltage to the gate wiring crossing the data wiring to which the video signal is applied, the thin film transistor provided in each pixel is turned on. In this case, when the thin film transistor is turned on, a voltage is applied to the pixel electrode in each pixel through the drain electrode and the source electrode to drive the liquid crystal display.

In order to have an excellent display quality, such a liquid crystal display device should be charged with sufficient charge in each pixel configured in the liquid crystal display device. In order to charge enough charge in each pixel, the time required for applying a voltage to the gate electrode is increased. The time of the on state of the thin film transistor in each pixel must be lengthened.

However, if the time of the thin film transistor is turned on, the longer the liquid crystal display device becomes larger or higher in resolution, the longer the overall time for turning on the thin film transistor in all the pixels, and the time for applying voltage to the gate wiring sequentially Since it takes a long time, a problem occurs that the display speed of the liquid crystal is remarkably slowed down.

Accordingly, to solve this problem, a liquid crystal display device for dividing and driving the screen has been proposed.

The display unit area for displaying an image is divided into upper and lower display units, and each of the display units is connected to different gates and data driving circuits to apply a signal voltage, thereby reducing the number of gate wirings for applying voltage per unit time. By providing a long time for the thin film transistor to be turned on in the wiring, an image with excellent display quality is provided.

2 schematically illustrates an array substrate for a general divided driving liquid crystal display device.

As shown in the figure, a plurality of pixels configured by the plurality of gate lines 53 and 55 extending in the horizontal direction and the data lines 65 and 67 extending in the vertical direction intersect at the center of the substrate 51. A display portion AA formed of P) is formed, and is connected to the data lines 53 and 55 formed on the display portion AA outside the display portion AA, particularly above and below the display portion AA. Data pad portions D1 and D2 for receiving a data signal voltage from a data driving circuit (not shown) are formed, and the left side of the display portion AA is connected to the gate wirings 53 and 55 and an external gate Gate pad portions G1 and G2 are configured to receive a gate on voltage from a driving circuit (not shown).

In this case, the upper data pad part D1 is for applying an image signal to the pixel P positioned in the upper area A1 of the display part AA, and the lower data pad part D2 is connected to the display part AA. This is to apply an image signal to the pixel P located in the lower area A2.

Similarly, in the gate pad portions G1 and G2, gate driving circuits (not shown) for applying gate voltages to the upper and lower pixels P are configured, respectively, and gates through the respective driving circuits (not shown). Since the application of the gate voltage to each of the wirings 53 and 55 proceeds independently for each region, the number of gate wirings in charge of each gate driving circuit (not shown) is reduced by half, thereby applying a gate voltage to each gate wiring per unit time, thereby applying a thin film. The time for turning on the transistor Tr can be increased.

In the above-described division drive array substrate 50, the display unit AA is divided into upper and lower display units A1 and A2, and different image signal voltages are applied to the display units A1 and A2. In order to do this, the data lines 65 and 67 should not be connected to each other in the upper and lower display portions A1 and A2. If data lines are connected and formed as in a general array substrate (not shown), different image signal voltages applied in two regions are simultaneously input to one data line, so that accurate image information is not transmitted to the pixel and is not desired. The new signal is inputted and loses its essence as an apparatus for displaying an image.

FIG. 3 illustrates a portion of a pixel area located at a portion of the center of the display unit in which the image of FIG. 2 is divided at a boundary of division driving, and FIG. 4 is a cross-sectional view of FIG. 3 taken along a cutting line I-I.

As shown in the figure, the upper data line 65 and the lower data line 67 are separated from each other on the gate line 55 positioned at the boundary between the upper and lower portions of the display parts A1 and A2 so that one end thereof is spaced a predetermined distance apart. It can be seen that it is formed.

In more detail, the pixel structure of the display portion and the boundary portion pixel structure is described. The gate lines 53 and 55 are positioned in the horizontal direction, and the data lines 65 and 67 are positioned in the vertical direction. 53, 55, and (65, 67) intersect to form a pixel region P, and within the pixel region P, the two wires (53, 55, and (65, 67)) intersect. The thin film transistor Tr is formed at a point where the thin film transistor Tr is connected, and the pixel electrode 90 is formed in each pixel region P by being connected to the thin film transistor Tr. In this case, the pixel electrode 90 is formed on the gate wiring 53 by partially overlapping with all the gate wiring 53 except for the gate wiring 55 at one end of each pixel area P. It is connected to the formed storage capacitor part Cs.

However, an array substrate for a split-drive liquid crystal display device having the above-described structure has data wires 65 and 67 separated from each other by a predetermined distance on the gate wires 55, which are upper and lower boundaries, so that the line width of the gate wires 55 is provided. Due to the limitation, it is difficult to secure sufficient space spaced apart between the ends of the data lines 65 and 67 formed on the upper and lower display portions A1 and A2, respectively. There is a high possibility that a short occurs in the wirings 65 and 67, and even though it is known that a short occurs between the upper and lower data lines 65 and 67, it is difficult to repair the wirings.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and prevents the short circuit of the upper and lower data lines by forming holes in the gate wirings formed at the boundary of the image segmentation, and further, the short. The present invention aims to provide an array substrate for a split-drive liquid crystal display device having a structure in which a short circuit is easily disconnected even after the process has been performed.

According to an embodiment of the present invention for achieving the above object, a display unit for displaying a central image, and the first and second data pad units connected to the first and second data driving circuits on the upper and lower sides of the display unit, respectively. And a gate pad part connected to an external gate driving circuit on the left or right side of the display unit, wherein the display unit is divided into upper and lower first and second regions so that the first and second regions are the first and second regions. An array substrate for a divided driving liquid crystal display device driven by first and second data driving circuits connected through a data pad unit, respectively; A plurality of first gate wires formed to be spaced apart at regular intervals in the first and second areas on the substrate in a horizontal direction; One second gate wiring formed at a boundary between the first and second regions at the same interval as the first gate wiring; A gate insulating film formed on an entire surface of the first and second gate wires; A plurality of first and second region data lines formed on the gate insulating layer to intersect the first and second gate lines and separated from the first and second areas on the second gate line by a predetermined distance; A thin film transistor formed at an intersection of the first and second gate lines and the first and second region data lines; A protective layer having a drain contact hole exposing a part of the thin film transistor on the front surface of the thin film transistor and a separation hole having a predetermined width and width in a region spaced apart from the first and second region data lines on the second gate line; And a pixel electrode connected to the thin film transistor through the drain contact hole on the passivation layer.

In addition, the second gate wiring itself is patterned corresponding to the separation hole, and thus the wiring hole having a wider width and width than the separation hole is further provided.

In this case, the separation hole is characterized by extending to the gate insulating film.

In addition, the predetermined distance between the first and second region data lines formed on the second gate wiring line may be greater than 8 μm and smaller than the line width of the gate line. Preferably, the separation holes formed in the spaced areas have a width of 4 μm to 8 μm.

In addition, the pixel electrode is in contact with the drain electrode of the thin film transistor through a side surface of the drain contact hole.

According to an embodiment of the present invention, a display unit for displaying a central image, first and second data pad units connected to external first and second data driving circuits on the upper and lower sides of the display unit, respectively, and the left side of the display unit Or a gate pad portion connected to an external gate driving circuit on the right side, wherein the display portion is divided into first and second regions of upper and lower portions so that the first and second regions are connected through the first and second data pad portions. A method of manufacturing an array substrate for a split-drive liquid crystal display device driven by one or two data driving circuits, respectively, is located in a plurality of first gate wirings in a horizontal direction in the first and second regions on the substrate and in the center of the first and second regions. And a second gate wiring having a predetermined width and width in the wiring itself, the second gate wiring including a plurality of wiring holes spaced apart from each other, and branched from each wiring in the respective gate wirings. Forming a gate electrode; Forming a gate insulating film over the first and second gate lines and the gate electrode; Forming a semiconductor layer overlying said gate electrode and having a predetermined area over said gate insulating film; One end overlaps with the second gate line on the gate insulating layer, and is separated by being spaced apart from each other with a wiring hole provided in the second gate line, respectively. Forming source and drain electrodes which are separated from each of the data wires and are separated from each other by predetermined distances, the source and drain electrodes being in contact with the semiconductor layer, respectively; Forming a protective layer on an entire surface of the first and second data lines and the source and drain electrodes; Forming a separation hole for exposing the substrate and a drain contact hole for exposing the side surface of the drain electrode and the substrate in a portion corresponding to the lower wiring hole in the protective layer; Forming a pixel electrode contacting the drain electrode through an inner side surface of the drain contact hole on the passivation layer on which the separation hole and the drain contact hole are formed.

In this case, the separation hole has a width and a width smaller than that of the lower wiring hole so that the second gate wiring is not exposed to the side of the wiring hole connected to the separation hole when the separation hole is formed.

In this case, the forming of the isolation hole extending to the wiring hole in the portion corresponding to the lower wiring hole in the protective layer to expose the substrate and the drain contact hole exposing the side of the drain electrode and the substrate may be performed in the protective layer. Forming a drain contact hole and exposing the shorted first and second data wire portions inside the separation hole, and simultaneously exposing a part of the drain electrode through the drain contact hole; Etching the shorted first and second data lines in the exposed separation hole and the drain electrode in the drain contact hole to expose a gate insulating layer thereunder; And etching the exposed gate insulating film in the separation hole and the drain contact hole to expose the substrate.

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

<First Embodiment>

FIG. 5 is a plan view showing a part of a pixel area of an upper and lower boundary portions of an array substrate for a split driving liquid crystal display device according to a first embodiment of the present invention. For convenience of description, the display unit of the array substrate includes a first region of the display unit located on the basis of the gate wiring in the center of the display unit that is the boundary, and a display region of the second area located below the gate wiring of the center. It is defined as

As illustrated, the plurality of gate wires 103 and 105 extend in the horizontal direction at regular intervals from each other, and the plurality of data wires 115 and 117 in the vertical direction intersect the gate wires 103 and 105. This is extending. In this case, the data lines 115 and 117 are formed separately from the first area A1 and the second area A2 of which the driving of the display units A1 and A2 is different. That is, although not shown in the drawing, the data line 115 of the first region A1 is positioned on the gate wiring 105 whose one end forms the boundary, and extends seamlessly to the outer upper portion of the first region A1. The data line 117 of the second area A2 is connected to the data pad unit (not shown), and one end thereof is spaced apart from one end of the data line 115 provided in the first area A1. The gate line 105 is positioned on the gate line 105 of the boundary, and extends downward to be connected to a data pad part (not shown) positioned at an outer lower portion of the second area A2. At this time, the spaced interval W1 between the data lines 115 and 117 of the first and second regions A1 and A2 is 8 µm or more on the gate line 105 positioned at the upper and lower boundary of the center of the display unit.

In addition, the wiring width at the intersection of the data wirings 115 and 117 and the gate wirings 103 and 105 is formed wider than the wiring width in the pixel region P, and the gate wiring 103 positioned at the intersection portion. 105 is itself a gate electrode 107. Further, the data line 115 of the first region A1 and the data line of the second region A2 are disposed on the gate line (hereinafter, referred to as a second gate line) 105 positioned at the center of the display unit and forming an upper and lower boundary. 117) The biggest feature of the present invention is that the separation holes 133 are formed in the protective layer (not shown) and the gate insulating layer (not shown) corresponding to the areas spaced between one end. In this case, it is preferable that the width W2 of the separation hole 133 is formed to be about 4 μm, and is smaller than the spacing interval W1 between the data lines of the first and second regions.

As described above, the first and second regions are formed by forming the separation holes 133 in the areas spaced between the data lines 115 and 117 of the first and second regions A1 and A2 on the second gate line 105. The separation between the data wires 115 and 117 of the A1 and A2 can be secured, or a short between the data wires 115 and 117 of the first and second areas A1 and A2 occurs. In addition, by forming the separation hole 133 in the protective layer (not shown), the short (short) data wire formed by one wire may be separated, thereby preventing a defect due to a short of the data wire.

Next, at the portion where each of the data wires 115 and 117 intersect with the gate wires 103 and 105, the source electrode 119 is formed by branching from each of the data wires 115 and 117. The drain electrode 121 is formed at a predetermined interval from 119 to include the source and drain electrodes 119 and 121, the semiconductor layer 113 and the gate electrode 107 formed thereunder, and a thin film transistor as a switching element. (Tr) is formed. In addition, the pixel electrode 140 is formed in the pixel region P by a predetermined distance from the gate lines 103 and 105 and the data lines 115 and 117 as a transparent conductive material. In this case, the pixel electrode 140 is formed. Is connected to the drain electrode 121 and the drain contact hole 129 of the thin film transistor Tr. In addition, the pixel electrode 140 includes all the gate wirings (hereinafter, referred to as first gate wiring) 103 and the pixel region P in the first and second regions A1 and A2 except for the second gate wiring 105. One side thereof overlaps with each other, and a storage capacitor Cs is formed in the gate wiring region overlapping the pixel electrode 140 to supply a charge to maintain the signal voltage applied to the pixel electrode 140. The pixel electrode 140 is connected to the storage capacitor Cs through the storage contact hole 131.

Next, a cross-sectional structure of a boundary portion in which data wirings of the above-mentioned divided driving liquid crystal display array substrate are separated between respective regions will be described.

6 is a cross-sectional view taken along the line II-II of FIG. 5.

As illustrated, a second gate line 105 is formed on the transparent substrate 101, and a gate insulating layer 110 is formed on the entire surface of the second gate line 105.

Next, the data wirings 115 and 117 of the first region A1 and the second region A2 are formed on the gate insulating layer 110 at predetermined intervals, and the data wirings 115 and 117 of the respective regions are formed. A protective layer 127 having a separation hole 133 is formed thereon. In this case, the separation hole 133 on the protective layer 127 is formed by extending to the lower gate insulating layer 110 to expose a portion of the second gate wiring 105. In this case, the separation hole 133 extending to the gate insulating layer 110 to expose a part of the second gate wiring 105 may form the protective layer 127 and then form the protective layer 127 and the lower gate insulating layer 110. It is formed by etching at the same time, in this case, the width (W2) of the separation hole 113 is about 4㎛, the data line 115 of the first and second regions separated on the second gate wiring 105, 117 is a spaced interval larger than the width (W2) of the separation hole 133 is characterized in that formed.

In the above-described structure, even if the data lines 115 and 117 of the first and second regions are shorted, the shorted portions are formed in the process of forming the separation hole 133 after the protective layer 127 is formed. Since the process of etching the data wiring portion is performed, a defect in which the data wiring between the divided driving regions is shortened can be prevented.

However, in the division driving liquid crystal display array substrate according to the first embodiment described above, the second gate wiring itself is exposed due to the separation hole configured to prevent the short circuit of the data wiring between the first and second regions. There is a problem of erosion of chemical liquids.

Accordingly, an array substrate for a split-drive liquid crystal display device having a structure complementing the above-described first embodiment is proposed through the second embodiment.

Second Embodiment

FIG. 7 illustrates a part of an array substrate for a split driving liquid crystal display according to a second exemplary embodiment of the present invention, and FIG. 8 illustrates a cross section taken along a cutting line III-III of FIG. 7.

The array substrate for split driving liquid crystal display according to the second embodiment of the present invention is constituted almost the same as the first embodiment as shown. Therefore, only portions that differ from the first embodiment will be described.

In the first embodiment, the isolation layer is formed in the protective layer and the gate insulating layer of the area between the data lines formed on the second gate line forming the upper and lower boundary of the display unit to expose a portion of the lower gate line. In the second embodiment, a portion of one end of the second gate line 205 overlaps the second gate line 205 on the second gate line 205 formed at the boundary between the first and second regions A1 and A2 in the center of the display unit. Separation holes provided on the passivation layer 227 and the gate insulating layer 210 in the second gate wiring region corresponding to the spaced apart region between the data wirings 215 and 217 of the first and second regions spaced apart from each other. It is characterized in that it has a structure in which a wiring hole 209 having a width and a width wider than a predetermined interval is formed.

That is, when the first and second gate wirings 203 and 205 are formed on the substrate 201, the second gate wiring 205 which is the boundary between the upper and lower display portions A1 and A2 is formed of the wiring 205 itself. The wiring hole 209 is provided by etching and removing a part of the region.

Therefore, the data wirings 215 and 217 of the first and second regions respectively separated from the first and second regions A1 and A2 are formed by a later process, and the data wirings 215 and 217 of the first and second regions are formed. ) Has a larger area than the protective layer 227 and the separation hole 233 formed on the gate insulating layer 210 corresponding to the spaced apart area, and overlaps the separation hole 233 to be wired in the second gate wiring 205. The hole 209 is formed to prevent the second gate wiring 205 itself from being exposed by the separation hole 233 as in the first embodiment.

According to the second embodiment described above, even if the data wirings of the first and second regions are shorted without being separated on the second gate wirings positioned at the upper and lower display portion boundaries, the separation holes are formed in the protective layer and the gate insulating film. The etching may be performed at the step of forming the first and second regions to prevent display quality degradation due to a short between the data wires of the first and second regions.

A manufacturing method of an array substrate for a split drive liquid crystal display device having the above structure will be briefly described.

9A to 9E are plan views of a process of manufacturing an array substrate for a split driving liquid crystal display device according to a second embodiment of the present invention, and FIGS. 10A to 10E and 11A to 11E are cut lines III-III and IV-, respectively. It is sectional drawing according to the manufacturing process of the area cut | disconnected along IV.

First, as shown in FIGS. 9A, 10A, and 11A, a metal material is deposited on a transparent substrate 201, and then a photoresist is applied onto the metal material layer, and then exposed using a mask (not shown). And a gate electrode 207 in a horizontal direction by developing a patterned process including developing the exposed photoresist, etching the exposed metal material layer, and stripping the remaining photoresist. A plurality of gate wirings 203 and 205 are formed. At this time, the second gate wiring 205 formed at the boundary between the divided upper and lower display parts, that is, the first and second regions A1 and A2, is patterned inside the wiring 205 to be predetermined in the center of the wiring 205. A plurality of wiring holes 209 having a width and a width thereof are formed at regular intervals. The spacing between the wiring holes 209 is such that there is an interval between the longitudinal data lines (not shown) to be formed later and the pixel areas (not shown) defined by the gate lines 203 and 205. In addition, the width of the wiring hole 209 is preferably formed within the range of 4㎛ 6㎛.

Next, as shown in FIGS. 9B, 10B, and 11B, the first gate wiring 203 and the first and second regions A1 and A1 in the first and second regions A1 and A2 including the gate electrode 207 are provided. A gate insulating film 210 is formed by depositing an inorganic insulating material on the entire surface of the substrate 201 where the second gate wiring 205 having a plurality of wiring holes 209 is formed at the boundary of A2. The pure amorphous silicon (a-Si) and the impurity amorphous silicon (n + a-Si) are successively deposited on the 210, and then patterned to cover the gate electrode 207. The active layer 213a and the ohmic contact layer ( A semiconductor layer 213 having 213b is formed.

Next, as shown in FIGS. 9C, 10C, and 11C, the metal material is deposited on the substrate 201 on which the semiconductor layer 213 is formed, and then patterned to form the first and second gate wirings 203 formed in the horizontal direction. It is arranged in the vertical direction to cross the 205 to form the pixel region (P), the plurality of wiring holes 209 provided in the second gate wiring 205 on the second gate wiring 205 between them. One end is spaced a predetermined distance to form a plurality of data wirings 215 and 217 of the first and second regions, respectively, separated in the first and second regions A1 and A2, and at the same time, above each other on the semiconductor layer 213. All first gates except for the source and drain electrodes 219 and 221 spaced apart from each other and the second gate wiring 205 formed at the boundary between the first and second regions A1 and A2 in the pixel region P. The wiring 203 has a predetermined region partially overlapping the first gate wiring 203. The second storage electrode 223 is formed. In this case, a predetermined region of the first gate line 203 overlapping the second storage electrode 223 forms the first storage electrode. Subsequently, the ohmic contact layer in a section in which the two electrodes 219 and 221 are spaced apart from each other using the source and drain electrodes 219 and 221 as a mask is removed, and the channel layer is exposed by exposing the active layer 223a as a lower layer. To form. In this case, the gate electrode 207, the semiconductor layer 223, and the source and drain electrodes 219 and 221 form a thin film transistor Tr.

9D, 10D, and 11D, an inorganic insulating material is deposited on the thin film transistor Tr and the exposed gate insulating layer 210, and then patterned to form a drain electrode 221 and a second storage electrode ( 223. The wiring hole 229 is patterned to correspond to the drain contact hole 229 and the storage contact hole 231 that expose a part of the same, and at the same time to correspond to the wiring hole 209 provided in the second gate wiring 205 located at the boundary. A protective layer 227 having a separation hole 233 having a width and width smaller than the width and width of 209 is formed. In this case, the separation hole 233 on the beam layer 227 extends to the wiring hole 209 formed on the second gate wiring 205 including the lower gate insulating layer 210 to expose the substrate 201. It is characterized in that it is formed to.

In this case, when forming the separation hole 233 exposing the substrate 201, the first and second gates 205 may be disposed on the second gate wire 205 positioned at the boundary between the first and second regions in the formation of the data wires 215 and 217. When the data line 215 or 217 of the region is shorted, the short circuit is removed by removing the data line portions of the shorted first and second regions exposed in the separation hole 233 when the separation hole 233 is formed. Can be prevented.

In this case, the storage contact hole 231 exposing the exposed data line portion and the second storage electrode 223 of the drain contact hole 229 region exposing the data lines 215 and 217 of the first and second regions. The exposed second storage electrode portion within is also removed together.

Next, as illustrated in FIGS. 9E, 10E, and 11E, a protective layer 227 including the drain contact hole 229, the storage contact hole 231, and the separation hole 233 is formed on the entire surface of the substrate 201. After depositing a transparent conductive material, the pixel electrode is patterned to contact the thin film transistor Tr through the drain contact hole 229 and at the same time to contact the second storage electrode 223 through the storage contact hole 231. By forming 240, the array substrate for the split driving liquid crystal display device is completed. In this case, the pixel electrode 240 is exposed to side surfaces of the drain contact hole 229 and the second storage contact hole 231 through the drain contact hole 229 and the storage contact hole 231. ) And the second storage electrode 223, respectively.

The array substrate for a split-drive liquid crystal display device according to the present invention has an effect of preventing the occurrence of short circuits of data wirings formed in the upper and lower display portions by providing separation holes on the gate wirings that are boundary of upper and lower image display. have.

In addition, even if a short occurs in the data line to be separated and formed on the gate line positioned at the boundary between the upper and lower display portions during the process of forming the data line, the metal material forming the data line of the shorted portion is removed by etching. There is an effect of further preventing short defects between data lines.

1 is a cross-sectional view showing a general liquid crystal display device.

2 is a plan view schematically showing an array substrate for a general divided driving liquid crystal display device;

FIG. 3 is a view showing a part of a pixel area located at a portion that is a boundary of division driving in the center of the display unit in which the image of FIG. 2 is divided; FIG.

4 is a cross-sectional view taken along the cutting line I-I of FIG. 3.

FIG. 5 is a plan view showing a part of pixel regions of upper and lower boundary portions of an array substrate for a split driving liquid crystal display device according to a first embodiment of the present invention; FIG.

6 is a cross-sectional view taken along the line II-II of FIG. 5.

FIG. 7 is a plan view showing a part of an array substrate for a split driving liquid crystal display according to a second embodiment of the present invention; FIG.

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

9A to 9E are plan views of a manufacturing process of an array substrate for a split driving liquid crystal display device according to a second embodiment of the present invention.

10A to 10E are cross-sectional views of manufacturing processes of regions cut along line III-III of FIG. 7.

11A to 11E are cross-sectional views of manufacturing processes of regions taken along a cutting line IV-IV of FIG. 7.

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

201: substrate 203, 205: first and second gate wiring

207: gate electrode 209: wiring hole

213: semiconductor layers 215 and 217: data wiring in first and second regions

219, 221: source and drain electrodes

223: second storage electrode 229: drain contact hole

231: storage contact hole 233: separation hole

Claims (9)

A display portion for displaying a central image, first and second data pad portions connected to the first and second data driving circuits on the upper and lower sides of the display portion, respectively, and an external gate driving circuit on the left or right side of the display portion. A gate pad part connected to a furnace, wherein the display part is divided into first and second areas of the upper and lower parts, so that the first and second areas are connected to the first and second data driving circuits connected through the first and second data pad parts. An array substrate for divided driving liquid crystal display devices, each driven by: A substrate; A plurality of first gate wires formed to be spaced apart at regular intervals in the first and second areas on the substrate in a horizontal direction; One second gate wiring formed at a boundary between the first and second regions at the same interval as the first gate wiring; A gate insulating film formed on an entire surface of the first and second gate wires; A plurality of first and second region data lines formed on the gate insulating layer to intersect the first and second gate lines and separated from the first and second areas on the second gate line by a predetermined distance; A thin film transistor formed at an intersection of the first and second gate lines and the first and second region data lines; A protective layer having a drain contact hole exposing a part of the thin film transistor on the front surface of the thin film transistor and a separation hole having a predetermined width and width in a region spaced apart from the first and second region data lines on the second gate line; A pixel electrode connected to the thin film transistor through the drain contact hole on the passivation layer Array-driven array substrate comprising a liquid crystal display device. The method of claim 1, And the second gate wiring itself is patterned corresponding to the separation hole, further comprising a wiring hole having a width and a width wider than that of the separation hole. The method according to claim 1 or 2, And the separation hole extends to the gate insulating film. The method according to claim 1 or 2, And a predetermined distance between the first and second region data lines formed on the second gate line is greater than 8 μm and smaller than the line width of the gate line. The method of claim 4, wherein The separation hole formed in the spaced apart area between the first and second area data lines has a width of 4 μm to 8 μm. The method according to claim 1 or 2, And the pixel electrode is in contact with the drain electrode of the thin film transistor through a side surface of the drain contact hole. A display portion for displaying a central image, first and second data pad portions connected to the first and second data driving circuits on the upper and lower sides of the display portion, respectively, and an external gate driving circuit on the left or right side of the display portion. A gate pad part connected to a furnace, wherein the display part is divided into first and second areas of the upper and lower parts, so that the first and second areas are connected to the first and second data driving circuits connected through the first and second data pad parts. In the manufacture of an array substrate for a split drive liquid crystal display device, each driven by A plurality of first gate wirings in the horizontal direction in the first and second regions on the substrate and a plurality of wiring holes positioned at the center of the first and second regions, having a predetermined width and width in the wirings themselves, and spaced apart by a predetermined distance. Forming a second gate wiring, and a gate electrode branched from each wiring in each of the gate wirings; Forming a gate insulating film over the first and second gate lines and the gate electrode; Forming a semiconductor layer overlying said gate electrode and having a predetermined area over said gate insulating film; One end overlaps with the second gate line on the gate insulating layer, and is separated by being spaced apart from each other with a wiring hole provided in the second gate line, respectively. Forming source and drain electrodes which are separated from each of the data wires and are separated from each other by predetermined distances, the source and drain electrodes being in contact with the semiconductor layer, respectively; Forming a protective layer on an entire surface of the first and second data lines and the source and drain electrodes; Forming a separation hole for exposing the substrate and a drain contact hole for exposing the side surface of the drain electrode and the substrate in a portion corresponding to the lower wiring hole in the protective layer; Forming a pixel electrode in contact with the drain electrode through an inner surface of the drain contact hole on the passivation layer where the separation hole and the drain contact hole are formed; Method of manufacturing an array substrate for a split drive liquid crystal display device comprising a. The method of claim 7, wherein The separation hole has a width and a width smaller than that of the lower wiring hole so that the second gate wiring is not exposed to the side of the wiring hole connected to the separation hole when the separation hole is formed. Method of preparation. The method of claim 7, wherein Forming a separation hole for extending the wiring hole in a portion corresponding to the lower wiring hole in the protective layer to expose the substrate and a drain contact hole for exposing the side of the drain electrode and the substrate; Forming a separation hole and a drain contact hole in the protective layer to expose the shorted first and second data wire portions inside the separation hole, and simultaneously exposing a part of the drain electrode through the drain contact hole; Etching the shorted first and second data lines in the exposed separation hole and the drain electrode in the drain contact hole to expose a gate insulating layer thereunder; Etching the exposed gate insulating layer in the isolation and drain contact holes to expose the substrate. A method of manufacturing an array substrate for a split drive liquid crystal display device, characterized by consisting of: