KR950004218B1 - Matrix address display unit and manufacturing method therefor - Google Patents

Abstract

The matrix address display device includes a transparent substrate, a plurality of the first and second signal lines arranged on a substrate's surface in the form of matrix defined by neighboring two first signal lines and two second signal lines, for limiting the matrix of each pixel including a transparent pixel electrode, a plurality of the first and second bonding pads formed on the substrate, for electrically connecting the first and second signal lines to an outer driving circuit, and a plurality of the first conductive pads for covering each overlapped part of the first signal lines and the first bonding pads by intervening in a insulating layer, in order to connect the first signal lines with the first bonding pads, thereby repairing the open and defect of a scan line and display signal line without added process, and reducing the production cost.

Description

Matrix address display device and manufacturing method thereof

1 is a plan view schematically showing the structure of a conventional matrix display device.

2 is a plan view for explaining a conventional method for compensating for disconnection of a scan signal line or a display signal line in a matrix display device.

3 is a cross-sectional view of a portion where a scan signal line and a bonding pad are connected in a conventional matrix display device.

4 is a cross-sectional view of a portion where a scan signal line and a bonding pad are connected in a matrix display device according to an embodiment of the present invention.

5 is a pixel layout diagram of a liquid crystal display device including a first electrode of a storage capacitor having a conventional annular structure.

6 is a pixel layout diagram illustrating a liquid crystal display device according to another exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a matrix address type display device, and more particularly, to a matrix address type display device capable of repairing disconnection and short circuit of the scan signal line, the display signal line, and a manufacturing method thereof.

In response to the demands for personalization and space saving of displays that handle the interface between humans and computers (and other computerized machines), LCDs have been used in place of conventional display devices, especially the relatively large and annoying cathode ray tube (CRT). Various flat screens and flat panel displays have been developed, such as liquid crystal display (PDP), plasma disp ray pannel (PDP), and electroluminescence (EL).

1 is a plan view showing the structure of a conventional matrix address type display device. The matrix display device includes 2 n (X ₁ -X _{2 n} ) scan signal lines 1 and 2 m (Y ₁ -Y _{2 m} ) display signal lines ₂ formed in an orthogonal shape and insulated therefrom. Such a matrix display device includes a display element such as a liquid crystal cell or an electroluminescence cell in each pixel area defined by the scan signal line 1 and the display signal line 2 crossing each other. Has a plurality of pixels.

Among these flat panel display devices, the progress of the technology of liquid crystal display (LCD) is attracting the most attention, and in some forms, even comparable to or higher than the CRT color quality. The driving method of the liquid crystal display device has a simple matrix type and an active matrix type, and uses the electro-optical property of the liquid crystal in which the arrangement of liquid crystal molecules is changed by an electric field (electrlc fleld). In particular, the active matrix LCD, which combines the above-mentioned liquid crystal technology and semiconductor technology, is recognized as a display device that outperforms CRT by competing with CRT.

The active matrix LCD controls the operation of each pixel by using the switching characteristics of the device by adding an active element having a nonlinear characteristic to each pixel arranged in a matrix form, and implements a memory function through the electro-optical effect of the liquid crystal. It is. As an active device, a three-terminal thin film transistor (Thln FlIm Transistor; TFT) is usually used, and a thin film diode (TFD) such as a two-terminal metal lnsulator metal (MIM) is used. In an active matrix LCD using such an active element, as shown in FIG. 1, a pixel area is integrated on a transparent glass substrate together with tens of thousands to hundreds of thousands of pixels together with address lines of scan signal lines and display signal lines, and thus, a matrix with TFTs serving as switching elements. In addition to the operation of the driving circuit, the display function is performed.

However, in the matrix address wiring structure as shown in FIG. 1, the scan signal line 1 and the display signal line 2 are disconnected due to the topographical characteristics of the area through which the wiring passes, or by subsequent heat treatment or etching processes. (open) or the two signal lines are shorted with each other often occurs. If the scan signal line 1 is disconnected in any part of the image display apparatus as shown in part A of FIG. 1, the signal is not transmitted to each pixel after the part A of the disconnection area, and thus the quality of the image corresponding to each pixel area is reduced. This becomes worse. In addition, when a short circuit occurs between the two lines at the intersection of the scan signal line 1 and the display signal line 2, as shown in part B of FIG. 1, the signal system transmitted through the two signal lines is scattered, and thus the display device cannot be used. do.

In order to overcome one of the problems described above, a technology for compensating for disconnection of signal lines generated in an active area by forming a conductive layer having an annular structure outside the active area of an image display device was developed by Matsushita Japan in 1987. (See, US Patent No. 4,807,973).

Referring to FIG. 2 attached to the technical contents disclosed in the US Patent No. 4,807,973 as follows. Like reference numerals in FIG. 1 denote like elements.

Referring to FIG. 2, the matrix address display apparatus is arranged on the substrate 11 in a matrix form in which 2n scan signal lines 1 and 2m display signal lines 2 are insulated from each other and orthogonal to each other, and the respective scans are performed. The liquid crystal cell is provided in each pixel area of the matrix form bordered by the signal line 1 and the display signal line 2. First bonding pads 13 are formed at both ends of each of the display signal lines 2 to connect the first electrode connection terminal 5 for electrical connection with an external driving circuit and the display signal lines. Second bonding pads 12 are formed at both ends of each scan signal line 1 to connect with the second electrode connection terminal 4 for electrical connection with the external driving circuit.

In addition, the compensation line 15 is insulated from the scan signal line 1 and the display signal line 2 in a ring shape surrounding the active area in which the pixel areas are integrated, and is formed of a conductive material layer. The compensation line 15 is configured to allow the compensation (repair) function of the disconnection part to be cooled with water independently of the connection between the external driving circuit and the first and second electrode connection terminals 4 and 5. It is formed outside the boundary of the active region consisting of the first and second electrode connection terminals (.4, 5)

In the matrix address display device having the structure described above, when the disconnection defective portion 3 of the scan signal line occurs, the compensation is performed through the conductive conductor 14 which is a connecting means connecting both ends of the scan signal line 1 where the disconnection occurs. It is connected to the line (15). Therefore, the input signal is transmitted to each pixel region arranged after the disconnection defective portion 3 along the compensation line 15 to smoothly perform a display function.

However, although the prior art disclosed in US Patent No. 4,807,973 can effectively repair the disconnection defect of the scan signal line or the display signal line, it includes the following problems.

First, in the matrix address liquid crystal display device, the disconnection defect of the scan signal line mainly occurs at the connection portion where the scan signal line and the bonding pad meet each other, and the compensation line disclosed in U.S. Patent No. 4,807,973 completely eliminates the disconnection defect of this portion. It cannot be repaired.

Second, the signal input through the scan signal line or the display signal line is transmitted through the compensation line 15 in case of disconnection defect, so the RC time delay effect due to the difference in resistance with the original signal line This is disadvantageous in obtaining a homogeneous image due to a difference in signal characteristics of other surroundings and their display characteristics. Moreover, the difference in the resistance value also occurs depending on the position of the disconnection portion in the pixel region, which is also disadvantageous in obtaining a uniform image. Today, with the increase of the size of the liquid crystal display panel, the problem becomes larger.

Third, the conventional technique can only repair the disconnection defect of each signal line, and cannot use it when a short circuit defect occurs between the scan signal line and the display signal line.

An object of the present invention is to solve the problems that the prior art does not solve, or to improve the disadvantages caused by the application of the prior art.

That is, the present invention provides a display device capable of repairing disconnection defects in signal lines generated at a connection portion between a bonding pad and a signal line for connection to an external driving circuit in a matrix address display device.

Another object of the present invention is to provide a display device capable of repairing disconnection and short-circuit defects in the scan signal line and the display signal line generated in the active region in which the pixel region is integrated in the matrix address liquid crystal display device.

It is also an object of the present invention to provide a suitable and simpler method of manufacturing the display device of the present invention described above.

The apparatus of the present invention for achieving the above object is a matrix address display device comprising: a transparent substrate and a matrix arranged on one surface of the substrate, two adjacent first signal lines and two second signal lines; To electrically connect the first signal line and the second signal line, the first signal line and the second signal line, which are bounded by a plurality of pixels to define a matrix of each pixel including transparent pixel electrodes. Each of the plurality of first bonding pads, the second bonding pads, and the first signal line and the first bonding pad formed on the substrate are overlapped with each other, and an insulating layer may connect the first signal line and the first bonding pad to each other. It characterized in that it comprises a plurality of first conductive pads formed in a form to cover each overlapped portion through the.

In another exemplary embodiment of the present invention, an active matrix liquid crystal display device includes: an overlap portion of the scan signal line and the first bonding pad so as to repair a disconnection defect of the scan signal line generated near the overlap between the scan signal line and the first bonding pad. The first conductive pad is formed through the first insulating layer.

In still another embodiment of the present invention, in a liquid crystal display device, a transparent substrate and a pixel region arranged in a matrix form on one surface of the substrate and bordered by two adjacent scan signal lines and two display signal lines A plurality of scan signal lines and display signal lines defining a matrix of the pixel, a pixel electrode disposed in each pixel region, a switching element arranged in each pixel region to connect the display signal lines and the pixel electrodes, A first electrode disposed in each pixel region and connected to the scan signal line in an annular shape facing the pixel electrode to surround the pixel electrode, wherein the first capacitor portion is interconnected by a redundant connection portion between adjacent pixel regions; And a portion of the scanning signal line adjacent to the first electrode of the additional capacitance portion in each pixel area are connected to each other. To be characterized by having been made in a plurality of second conductive pads formed via a second insulating layer.

Meanwhile, another embodiment of the present invention is a liquid crystal display device having a first electrode formed in an annular shape below a pixel electrode and connected to a scan signal line, the liquid crystal display device comprising: a first bonding pad for electrical connection with an external driving circuit; The first conductive pad is formed over the overlapping portion of the scan signal line to form a first conductive pad, thereby repairing disconnection defects of the scan signal line. In each pixel area, the first electrode of the additional capacitance portion and the adjacent scan signal line can be connected to each other. A second conductive pad may be formed through the second insulating layer to repair disconnection and short circuit occurring at the intersection of the scan signal line and the display signal line.

In the embodiments of the present invention, the first conductive pad and the second conductive pad formed by interposing the first signal line or the scan signal line and the insulating layer may be connected to each other in accordance with the embodiment by laser welding. In the address display device, disconnection and short circuit of the scan signal line or the display signal line can be effectively repaired.

Meanwhile, the manufacturing method of the liquid crystal display device of the present invention is characterized in that the first conductive pad or the second conductive pad is patterned together with the display signal lines of the liquid crystal display device.

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matrix address type display device, and the present embodiments show an active matrix liquid crystal display device using a thin film transistor as a switching element in each pixel region.

The structure of a general liquid crystal display device is as follows. That is, the liquid crystal layer is injected and sealed between two transparent glass substrates, the front glass substrate and the rear glass substrate, to perform a display function. The front glass substrate and the rear glass substrate are arranged in parallel with each other. It forms a multi-layer structure that each performs a certain function on the opposite inner surface.

In the front glass substrate, a light blocking layer is formed on the inner surface of the front glass substrate. This light shielding layer is suitably patterned by a conventional photolithography process in order to define a window, that is, an aperture area, parallel to and aligned with each pixel electrode matrix disposed on the back glass substrate. A color filter layer is then formed over the exposed area of the inner surface of the light shielding layer and the front glass substrate. The color filter layer includes a light transmitting area disposed on the opening surface. A protective layer is then formed over the color filter layer. A transparent electrode is formed on the protective layer to complete the multilayer structure on the inner surface of the front glass substrate. '

In the back glass substrate, a plurality of scan signal lines (gate lines) and display signal lines (data lines) formed so as to extend perpendicular to each other in the vertical and horizontal directions are arranged in a matrix, and the scan signal lines and the display signal lines are electrically connected to an external driving circuit. Bond pads are formed along the periphery of the substrate. An area bordered by the scan signal line and the display signal line is arranged in a matrix on the substrate as a pixel area. A transparent pixel electrode is formed inside the pixel area, and forms a pixel through a liquid crystal facing the transparent electrode formed on the front glass substrate. On the other hand, switching elements are disposed in each pixel region in order to selectively transmit signals to the pixel electrodes arranged in a matrix. As each switching element, a three-terminal thin film transistor (TFT) is commonly used, and recently, a two-terminal thin film diode (TFD) may be used.

When a constant electric field is applied to the transparent electrode of the front glass substrate and the pixel electrode of the rear glass substrate, a display function is realized according to the electro-optical properties of the liquid crystal.

The present invention is to repair the defect caused by the disconnection and short circuit of the scan signal line and the display signal line is formed on the rear glass substrate in the liquid crystal display device to input and output a signal to each pixel. In the case of using the thin film transistor as a switching device, a process of forming a multilayer structure on a back glass substrate is as follows.

First, a rear glass substrate of a liquid crystal display panel is prepared, and a bonding pad is formed thereon to electrically connect the display signal line and the scan signal line to an external driving circuit. In this case, the bonding pad metal mainly uses chromium (Cr). Subsequently, aluminum is usually laminated on the entire surface of the substrate and then patterned to form a scan signal line. In some cases, the scan signal line may be formed first, and then a bonding pad may be formed. An end portion of the scan signal line and a bonding pad to be connected to the scan signal line are overlapped. Subsequently, when the scan signal line is formed of aluminum, an aluminum oxide film may be coated on the surfaces of the electrodes by an anodizing method to improve electrical characteristics thereof.

Subsequently, an insulating layer such as silicon nitride (SiNx) and a semiconductor layer of amorphous silicon hydride (a-Si: H) are deposited by CVD (chemical vapor deposition). At this time, an amorphous silicon hydride (n + a-Si: H) doped with N type may be deposited on the amorphous silicon hydride as an ohmic layer. Afterwards, the semiconductor layer is patterned to define a portion where the thin film transistor is to be positioned in each pixel region. In this case, the semiconductor layer may remain on the substrate outside of the active area where the pixel areas are integrated, that is, the area where the bonding pads are formed, to reinforce the insulating function. Subsequently, a transparent metal such as indium tln oxide (ITO) is deposited by a sputtering method, and then patterned to form pixel electrodes in each pixel region.

Subsequently, chromium and aluminum are deposited on the entire surface of the substrate by a sputtering method, and then the display signal line, the source and drain electrodes of the TFT are patterned, and a silicon nitride protective film is deposited on the entire surface of the substrate by CVD. This is done.

3 is a cross-sectional view showing a connection portion between a scan signal line and a bonding pad in a conventional liquid crystal display device. That is, the scan signal lines 21 made of aluminum are patterned on the transparent glass substrate 20, and the aluminum oxide film 22 is coated on the surface of the aluminum. A bonding pad made of chromium or the like is formed to overlap with the end of the scan signal line for connection with an external drive circuit. A first insulating layer 24 such as silicon nitride is stacked on the entire surface of the resultant, and a semiconductor layer 25 forming a thin film transistor of the liquid crystal display device is formed thereon. The semiconductor layer 25 may be removed. The second insulating layer 26 is formed on the semiconductor layer 25. The second insulating layer 26 is a silicon nitride layer serving as an etching stopper on the semiconductor layer 25 when the thin film transistor is an etching stopper type thin film transistor. In addition, the second insulating layer 26 is patterned after the semiconductor layer 25 is formed, and then a transparent pixel electrode (not shown) is patterned in each pixel region, and then a metal layer is stacked on the front surface to display the signal lines. (Not shown), the lower substrate of the liquid crystal display device, which is formed by stacking the source and drain electrodes (not shown) of the thin film transistor on the front surface, may be a protective layer in contact with the liquid crystal layer. The first insulating layer 24, the semiconductor layer 25, and the second insulating layer 26 may be referred to as one insulating layer having a composite layer structure.

However, in the above structure, the disconnection defect of the scan signal line of the portion C where the scan signal line 21 and the bonding pad 23 overlap each other frequently occurs. This is because stress is concentrated in this part due to the difference in thermal expansion coefficient with the bonding pad 23 in the heat treatment process in which the scan signal line 21 is followed, and in the etchant during etching for the subsequent formation of the ITO pixel electrode pattern. This is because the etching action acts strongly to erode the scan signal line 21. The disconnection defect of the scan signal line 21 is more severe when the scan signal line is made of aluminum, and when the etching stopper type thin film transistor is used, the effect is further increased due to an additional process for etching the etching stripper layer.

4 is a cross-sectional view of a liquid crystal display according to an exemplary embodiment of the present invention capable of repairing disconnection defects in the scan signal lines shown in FIG. Like reference numerals in FIG. 3 denote like elements.

As shown in FIG. 4, the first insulating layer 24, the semiconductor layer 25, and the pixel electrode (not shown) are sequentially formed, and then a metal layer is laminated on the front surface and patterned to form the display signal line and the thin film transistor. When forming the source and drain electrodes, conductive pads 27 are formed on the overlapping portions of the scan signal lines and the bonding pads. When the disconnection defect D of the scan signal line 21 is found as shown in FIG. 4, when the laser is fired on the conductive pad 27, a laser welding portion 28 is formed to open the scan signal line. Defects are repaired. Since the conductive pads 27 can be formed at the same time as the display signal line, the disconnection defect can be easily healed without further processing.

On the other hand, another embodiment of the present invention relates to a liquid crystal display device capable of repairing disconnection and short-circuit defects of the scan signal line and the display signal line in an active region in which each pixel region is arranged in a matrix.

In general, in order to secure unlformlty of an image displayed in an active matrix liquid crystal display device, it is necessary to maintain a signal voltage input through a display signal line (data line) for a predetermined time until the next input. In order to reduce the load capacities for the scan lines, a storage capacitor or an additional capacitor is formed in parallel with the liquid crystal cell.

An active matrix liquid crystal display device having a storage capacitor driven by an independent wiring method to improve display characteristics has been proposed by Hitachi (Ref, "High-ResoIution l0.3- · in DiagonaI Multicolor TFT-LCD", M. Tsumura, M. Kita] lma, K. Funahata, et al, SID 9l DIGEST, pp 215-218). The active matrix liquid crystal display device has a double shielding layer structure and a gate line to obtain high contrast ratio and high aperture ratio. In addition, the capacitance of the liquid crystal display is improved by forming a storage capacitor by an independent wiring method.

On the other hand, as an additional capacitance method, the applicant of the present invention, which is formed to face the transparent pixel electrode and forms an additional capacitance in the form of a ring tyPe surrounding the transparent pixel electrode, dated September 9, 1991 (Korea) Patent application No. 91-15530).

The active matrix liquid crystal display device is characterized in that the layout of the first electrode of the additional capacitance connected to each pixel electrode is changed in such a manner that its aperture ratio and contrast ratio are greatly increased.

On the other hand, the liquid crystal display device having the first electrode of the annular form of the additional capacitance disclosed in Patent Application No. 91-15530 has a very improved display characteristics such as an increase in the aperture ratio and an increase in the contrast ratio, but the wiring in which the scan signal line and the display signal line cross each other. The scan signal line is disconnected due to a foreign material or a weak insulating film at an intersection portion, or a short circuit defect occurs between the scan signal line and the display signal line. Applicant has filed a patent on June 1, 1992 (Korean Patent Application No. 92-9510) for a liquid crystal display device solved without reducing the aperture ratio and contrast ratio of the device.

FIG. 5 is a pixel layout diagram of a liquid crystal display device having a capacitor first electrode of an annular additional capacitance type disclosed in Patent Application No. 92-9510.

As shown in FIG. 5, the invention disclosed in No. 92-9510 shows a liquid crystal display device using a ring-capacitive first capacitance capacitor first electrode shown in Patent Application No. 91-15530. The redundancy connecting portion 38 is formed between the first electrodes 36 of the adjacent additional capacitances formed in the form of surrounding the pixel electrode 35 and connected to each other. The redundant connection part 38 is formed to be orthogonal to the display signal line 33 via the insulating layer. In this case, the wiring crossing portions where the scan signal lines 32 and the display signal lines 33 cross each other are generated at two positions per first pixel area (the first wiring cross-section X _l and the second wiring cross-section X ₂ ). The switching element is composed of a thin film transistor 34 composed of a drain electrode 34a, a gate 34b, and a source electrode 34c.

The invention disclosed in FIG. 5 basically solves the problem of disconnection or short circuit occurring in the wiring intersection of the scan signal line and the display signal line. That is, disconnection defect occurs only when the scan signal line 32 is disconnected from the first wiring cross section X ₁ and the second wiring cross section X ₂ with respect to the same display signal line 33. If disconnection occurs in only one part, it does not appear as disconnection failure. On the other hand, when the scan signal line 33 and the display signal line 32 have a short circuit at any one of the two wiring cross sections, the scan signal lines are doubled when the scanning signal lines before and after the short circuit point of the short circuit line have been cut off. Because of this, short circuit fault is repaired.

However, the invention disclosed in Korean Patent Application No. 92-9510, as shown in FIG. 5, cannot be repaired in the following cases.

That is, in FIG. 5, when both the scan signal line 32 and the redundant connection part 38 are disconnected in the first wiring cross-section X ₁ and the second wiring cross-section X ₂ , the angles after the defective area may be reduced. The signal through the scan signal line 32 is not transmitted to the pixel region.

In addition, when the scan signal line and the display signal line are shorted in the first wiring cross section X ₁ and the display signal line and the redundant connection section are shorted in the second wiring cross section X ₂ , repair thereof is impossible. Done.

In addition, when the display signal lines are both disconnected in the first wiring cross-section X ₁ and the second wiring cross-section X ₂ , repair thereof becomes impossible.

FIG. 6 is a pixel layout diagram of a liquid crystal display according to an exemplary embodiment of the present invention, which improves the problem occurring in FIG. 5. Like reference numerals in FIG. 5 denote like elements.

Referring to FIG. 6, the plurality of investigation signal lines 32 and the display signal lines 33 are formed in a matrix address manner orthogonal to each other on the transparent glass substrate 31, and surround the pixel electrode 35. A first electrode 36 having an additional capacitance formed in the shape is connected to the scan signal line 32 to be driven together with the redundant electrode 38, and a redundant connection 38 is formed between the additional capacitance first electrodes 36 in the adjacent pixel region. . In addition, unlike FIG. 5, a conductive pad 37 for connecting the first electrode 36 having the additional capacitance and the scan signal line 32 adjacent thereto is formed near the thin film transistor 34 as a switching element. The conductive pad 37 is formed of the same metal as the display signal line 33 to be patterned at the same time as the display signal line 33 is formed.

On the other hand, when the conductive pad 37 is connected to the scan signal line 32 adjacent to the first electrode 36 of the additional capacitance around the redundant connector 38, the first capacitance of the additional capacitance is prevented to prevent a short circuit of the scan signal. Cutting portions 39a for disconnecting the electrodes are formed at four locations around the redundant connection portion 38, and protection grooves 39b for preventing damage to the electrode 35 when cutting the cutting portions 39a. Are each formed,

The liquid crystal display device of the present invention configured as described above repairs the disconnection and short circuit defects of the scan signal line 32 and the display signal line 33 as follows.

First, a disconnection may occur in only one of the first wiring cross section X ₁ and the second wiring cross section X ₂ with respect to the same display signal line 33 due to a defect in the manufacturing process. In this case, since the scan signal line 32 is duplicated by the redundant connection part 38, it does not appear as disconnection defect.

In addition, when the scan signal line 32 is disconnected from both the first wiring cross section X ₁ and the second wiring cross section X ₂ with respect to the same display signal line 33, another embodiment of the present invention described above is Laser on the conductive pad 37 in the same manner as used to repair the disconnection defect of the scan signal line generated at the overlapping portion of the scan signal line and the bonding pad, that is, by firing a laser to fuse the upper and lower metal layers. By firing the signal, one side of the conductive pad 37 and the first electrode 36 of the additional capacitance are connected, and the scan signal line adjacent to the other side of the conductive pad is connected to the next pixel area without disconnection of the signal. Can be delivered.

On the other hand, when a short circuit occurs in both the first and second wiring cross sections by the same principle, the conductive pads 37 are connected by cutting the scan signal lines before and after the first and second wiring cross sections. If the display signal line 33 is disconnected at the two wiring cross sections, all the scan signal lines before and after the wiring cross section are cut, and the laser at the conductive pad 37 and the wiring cross section If a part of the scan signal line cut at both ends and the display signal line are fused and connected, the defect is repaired.

In addition, according to the same principle, even when one of the first and second wiring intersections is broken, and the other part is short circuited, the defects can be repaired.

Although the foregoing embodiments of the present invention have been described herein, many variations and modifications from the basic concepts of the invention may be foreseen by one of ordinary skill in the art.

For example, the techniques shown in FIGS. 4 and 6, which are embodiments of the present invention, are combined. In other words, the conductive pads 27 in FIG. 4 and the conductive pads 37 in FIG. 6 are simultaneously formed in the active region in which the pixel regions are aggregated in the region where the scan signal lines and the bonding pads overlap. Without the short circuit defect of the scan signal line, it is possible to effectively repair the disconnection and short circuit of the scan signal line, the display signal line.

As described above, according to the present invention, since the disconnection and short circuit of the scan signal line and the display signal line can be repaired without further processing in the matrix address display device, the manufacturing yield of the display device can be greatly improved, and the cost can be greatly reduced. It can bring an effect.

Claims (26)

A matrix of each pixel comprising a transparent substrate and a matrix arranged on one surface of the substrate, bordered by two adjacent first signal lines and two second signal lines, and including transparent pixel electrodes therein. A plurality of first bonding pads and second bonding pads formed on the substrate to electrically connect the first signal lines and the second signal lines, and the first signal lines and the second signal lines to an external driving circuit. The first signal line and the first bonding pad are overlapped, and the plurality of first conductive layers are formed to cover each overlapped portion through an insulating layer so as to connect the first signal line and the first bonding pad to each other. A matrix address display device comprising a pad. The matrix address display apparatus of claim 1, wherein the first signal line is a scan signal line, and the second signal line is a display signal line. The matrix address display device of claim 1, wherein the first bonding pad overlaps the first signal line. The matrix address display device of claim 1, wherein the first conductive pad is made of the same material as the second signal line. The method of claim 1, wherein the first signal line is disconnected under a portion in which the first conductive pad is formed, and the first bonding pad and the first signal line are respectively connected to the first conductive pad to repair the disconnected portion. A matrix address display device, characterized in that it is electrically connected. 6. The matrix address display device according to claim 5, wherein the first bonding pad and the first signal line are laser welded to the first conductive pad. The matrix address display device of claim 1, wherein the second bonding pad connects the second signal line to an external driving circuit. A plurality of scan signal lines and display signal lines arranged in a matrix form on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent scan signal lines and two display signal lines; A pixel electrode disposed in the pixel region, a switching element disposed in each pixel region connecting the display signal electrodes and the pixel electrodes, and electrically connecting the scan signal line and the display signal line to an external driving circuit. The plurality of first bonding pads and second bonding pads formed on the transparent substrate, and the scan signal lines and the first bonding pads overlap each other, and the scan signal lines and the first bonding pads may be connected to each other. And a plurality of first conductive pads formed to cover each overlapped section with a first insulating layer therebetween. A liquid crystal display device, characterized in that made open. The liquid crystal display device according to claim 8, wherein the switching element is a thin film transistor. 10. The liquid crystal display device according to claim 9, wherein the thin film transistor is an inverted stagger type. The liquid crystal display device according to claim 10, wherein the thin film transistor is an etching stripper type having an etching stopper layer formed on a semiconductor layer. The liquid crystal display device according to claim 8, wherein the scan signal line is made of aluminum. The liquid crystal display of claim 8, wherein the first conductive pad is made of the same material as the display signal line. The liquid crystal display device according to claim 13, wherein the first conductive pad has a laminated structure of chromium / aluminum. The liquid crystal display of claim 8, wherein the first insulating layer formed under the first conductive pad is a composite layer. The liquid crystal display of claim 15, wherein the composite layer comprises a semiconductor layer. The method of claim 8, wherein the scan signal line is disconnected under a portion in which the first conductive pad is formed, and the first bonding pad and the scan signal line are electrically connected to the first conductive pad, respectively, to repair the disconnected portion. A matrix address display device, characterized in that connected. A plurality of scan signal lines and display signal lines arranged in a matrix form on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent scan signal lines and two display signal lines; A pixel electrode disposed in each pixel region, a switching element disposed in each pixel region to connect the display signal lines and the pixel electrodes, and disposed in the pixel region to face the pixel electrodes An additional capacitor connected to the scan signal line in an annular shape surrounding the second capacitor region, and adjacent to the first electrode of the additional capacitor portion interconnected by the redundant connection portion, and the first electrode of the additional capacitance portion in each pixel region. A plurality of second formed through the second insulating layer so that a part of the scan signal line can be connected to each other A liquid crystal display device, characterized in that made in having the conductive pads. 19. The liquid crystal display device according to claim 18, wherein the switching element is an inverted staggered thin film transistor. 19. The liquid crystal display device according to claim 18, wherein the second conductive pad is made of the same material as the display signal line. 19. The liquid crystal display device according to claim 18, wherein a protective groove is formed in the pixel electrode to prevent damage to the pixel when the first electrode around the redundant connection part is cut. A plurality of scan signal lines and display signal lines arranged in a matrix form on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent scan signal lines and two display signal lines; A pixel electrode disposed in each pixel region, a switching element disposed in each pixel region connecting the respective display signal electrodes and the pixel electrodes, and electrically connecting the scan signal lines and the display signal lines to an external driving circuit. A plurality of first bonding pads and second bonding pads respectively formed on the transparent substrate, and connected to the scan signal lines in an annular shape disposed in each pixel area so as to surround the pixel electrodes. An additional capacitance portion, wherein the additional capacitance portion is interconnected by a redundant connection portion between adjacent pixel regions; The first electrode, the scan signal lines and the first bonding pads overlap each other, and cover the overlapped portions through a first insulating layer to connect the scan signal lines and the first bonding pads to each other. A plurality of first conductive pads formed of a plurality of first conductive pads, and a plurality of second conductive pads formed through a second insulating layer to connect a portion of the first electrode of the additional capacitance portion of each pixel region to a portion of the scan signal line adjacent to each other. Liquid crystal display device characterized in that. The liquid crystal display of claim 22, wherein the first conductive pad and the second conductive pad are made of the same material as the display signal line. A plurality of scan signal lines and display signal lines arranged in a matrix form on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent scan signal lines and two display signal lines; A pixel electrode disposed in each pixel region, a thin film transistor disposed in each pixel region to connect the display signal electrodes and the pixel electrodes to perform a switching function, and the scan signal line and the display signal line to an external driving circuit. A plurality of first bonding pads and second bonding pads, and each of the scan signal lines and the first bonding pads formed on the transparent substrate so as to be electrically connected to each other, overlap the scan signal lines and the first bonding pads. A plurality of formed in the form of covering each overlapped portion via the first insulating layer so that the pad can be connected to each other A method of manufacturing a liquid crystal display device comprising a first conductive pad, comprising: stacking and patterning a first metal layer on a transparent substrate to form a plurality of scan signal lines; Stacking and patterning a metal layer to form the first and second bonding pads, and sequentially stacking an insulating layer and a semiconductor layer on the resultant, and then patterning the semiconductor layer to form a semiconductor layer of the thin film transistor. Forming a pixel electrode in each pixel region by laminating and patterning a transparent third metal layer over the entire surface of the resultant; and stacking and patterning a fourth gold metal layer on the resultant to display a plurality of display signal lines and the thin film. And forming a source, a drain electrode, and the first conductive pad of the transistor. Method. 25. The method of claim 24, wherein an insulating layer serving as an etching stopper is further laminated after the semiconductor layer is laminated. A plurality of scan signal lines and display signal lines arranged in a matrix form on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent scan signal lines and two display signal lines; A pixel electrode disposed in each pixel region, a thin film transistor disposed in each pixel region to connect the display signal lines and the pixel electrodes to perform a switching function, and a pixel electrode disposed in each pixel region, A first electrode connected to the scan signal line in an annular shape surrounding the periphery thereof, and configured to have an additional capacitance portion, and a first electrode of the additional capacitance portion interconnected by a redundant connection portion, and a first capacitance portion within each pixel region. One electrode and a portion of the adjacent scanning signal line are connected to each other via a second insulating layer. A method of manufacturing a liquid crystal display device comprising a plurality of second conductive pads formed thereon, wherein a first metal layer is laminated on a transparent substrate and then patterned to form a bonding pad for electrical connection with an external driving circuit. Forming a plurality of scan signal electrodes and a first electrode of the additional capacitance portion by laminating and patterning a second metal layer on the resultant, and sequentially forming an insulating layer and a semiconductor layer on the resultant. Patterning a semiconductor layer to form a semiconductor layer of the thin film transistor, laminating a transparent third metal layer on the resultant, and patterning a pixel electrode in each pixel region, and forming a fourth electrode on the resultant A plurality of display signal electrodes, a source and a drain electrode of the thin film transistor, and the second conductive pad A process for producing a liquid crystal display device, comprising the steps of: