KR20050064407A - Liquid crystal display panel and method of fabricating the same - Google Patents

Abstract

In the liquid crystal display panel of the present invention, since the surface of the common voltage supply metal pattern formed on the array substrate is melted using a laser so as to be connected to the common electrode of the color filter substrate, the formation of the silver dots is not necessary. A first substrate and a second substrate, each of which is divided into a pixel portion as an image display region and a pixel outer portion as an image non-display region; A plurality of gate lines and data lines arranged on the first substrate and defining a plurality of pixel regions in the pixel portion by crossing vertically and horizontally; A pixel electrode formed on each pixel area; Switching elements formed in the pixel areas; A common electrode formed on the second substrate; And a metal pattern formed at an outer periphery of the pixel of the first substrate and connected to the common electrode of the second substrate to supply a common voltage.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel and a method for manufacturing the same. In particular, a liquid crystal display panel and a method for manufacturing the same, which prevent a process defect due to the formation of the silver dot, by replacing the silver dot which supplies a common voltage to the common electrode of the color filter substrate. It is about.

In today's information society, display is more important as a visual information transmission medium, and in order to gain a major position in the future, it is necessary to satisfy requirements such as low power consumption, thinness, light weight, and high definition. Liquid Crystal Display (LCD), the flagship product of Flat Panel Display (FPD), has not only the ability to satisfy these conditions of the display but also mass production. It has been established as a core parts industry that can gradually replace the existing cathode ray tube (CRT).

BACKGROUND ART In general, a liquid crystal display device is a display device in which data signals according to image information are individually supplied to pixels arranged in a matrix form so that a desired image can be displayed by adjusting light transmittance of the pixels.

To this end, the liquid crystal display device is a liquid crystal display panel which largely injects liquid crystal between a color filter substrate and an array substrate to output an image, and is installed on a rear surface of the liquid crystal display panel to provide light over the entire surface of the panel. The backlight unit may include a lower cover and a top case to fix the corners of the liquid crystal display panel and the backlight unit to each other.

As described above, the liquid crystal display panel includes a color filter substrate, an array substrate, and a liquid crystal layer formed between the color filter substrate and the array substrate.

The color filter substrate may include a black matrix that distinguishes between a color filter including a sub color filter (red, green, blue) that implements color and the sub color filter, and blocks light transmitted through the liquid crystal layer. It consists of a transparent common electrode for applying a voltage to the liquid crystal layer.

In addition, the array substrate is a thin film transistor (TFT) which is a switching element formed in a cross region of the gate line and the data line, the plurality of gate lines and data lines arranged vertically and horizontally on the substrate to define a plurality of pixel areas. ) And a pixel electrode formed on the pixel region.

The color filter substrate and the array substrate configured as described above are provided with a cell gap so as to be uniformly spaced apart by a spacer, and are united by a seal pattern formed on the outside of the image display area. The display panel is formed. At this time, the bonding of the two substrates is made through a bonding key formed on the color filter substrate or the array substrate.

Meanwhile, silver paste dot patterns having conductive and adhesive properties are formed at four corners of the pixel portion of the array substrate to apply a common voltage to the color filter substrate.

The silver dot is formed by performing a separate process on the array substrate or the color filter substrate before and after forming the seal pattern, and various problems are caused by the silver dot formation.

That is, since the electrical conductivity is different according to the material of the silver paste itself, when a plurality of silver dot patterns having different electrical conductivity characteristics are formed, the same common voltage cannot be applied to the common electrode, which may cause driving failure. Problems will arise.

In addition, the silver dot is generally formed by a printing method using a syringe filled with silver paste or the like. In the process of driving the equipment, foreign matters such as foreign matters generated in the driving part may be generated on the substrate. It was.

In particular, the plurality of silver dot patterns formed as described above may have different sizes depending on the state of the equipment during the formation process, thereby causing cell gap defects in which the cell gap between the color filter substrate and the array substrate is not kept constant. There was a problem letting. That is, the silver dot may be formed larger in the outer portion of the liquid crystal display panel than other portions, and cell gap defects may occur due to the cause of higher cell gap than other portions.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a liquid crystal display panel which prevents process defects due to silver dot formation by forming a common voltage supply metal pattern on an array substrate and connecting it with a common electrode of a color filter substrate is manufactured. It is an object to provide a method.

Further objects and features of the present invention will be described in the configuration and claims of the invention which will be described later.

In order to achieve the above object, the liquid crystal display panel of the present invention is arranged on the first substrate, the second substrate, and the first substrate divided into a pixel portion which is an image display region and a pixel outer portion which is an image non-display region, vertically and horizontally. A plurality of gate lines and data lines crossing the pixel portions to define a plurality of pixel regions, a pixel electrode formed on each pixel region, a switching element formed on each pixel region, a common electrode formed on the second substrate, and The metal substrate may be formed on the outer periphery of the first substrate and may be connected to the common electrode of the second substrate to supply a common voltage.

In this case, the gate driving circuit unit and the data driving circuit unit may be further included in the pixel substrate of the first substrate to supply a gate signal and a data signal to the gate line and the data line, respectively. The display device may further include a common voltage wire connected to the gate driving circuit part to receive a common voltage and apply the common voltage to the metal pattern.

In addition, the metal pattern may be formed at at least one corner of the outer edge of the pixel portion of the first substrate, and may be formed of a low resistance metal material such as molybdenum and aluminum.

In addition, the metal pattern may have the same height as the cell gap thickness between the first substrate and the second substrate.

In addition, the manufacturing method of the liquid crystal display panel of the present invention comprises the steps of providing a first substrate and a second substrate divided into a pixel portion and the pixel outer portion, forming a switching element in the pixel portion of the first substrate, the first substrate Forming a common voltage supplying metal pattern on an outer periphery of the pixel, forming a common electrode on the second substrate, bonding the first substrate and the second substrate together, and supplying the common voltage of the first substrate Melting the metal pattern to connect the metal pattern to the common electrode of the second substrate.

In this case, the surface of the common voltage supply metal pattern may be melted using a laser and connected to the common electrode, and the laser may use a yag laser having a wavelength of about 0.45 to 2.5 μm.

The forming of the switching element and the common voltage supply metal pattern on the first substrate may include forming a gate electrode in a pixel portion of the first substrate, and forming a common voltage wiring in an outer portion of the pixel. Depositing a first insulating film on a substrate, forming an active pattern including an active layer in a pixel portion of the first substrate, and forming a source electrode and a drain electrode electrically connected to a predetermined region of the active layer Forming a second insulating layer on the first substrate, the second insulating layer including a pixel portion contact hole exposing a portion of the drain electrode and a pixel outer contact hole exposing a portion of the common voltage wiring; Forming a pixel electrode electrically connected to a drain electrode through the pixel portion contact hole in the portion and through the pixel outer contact hole The method may include forming a common voltage supply metal pattern electrically connected to a voltage supply line. The forming of the switching element and the common voltage supply metal pattern on the first substrate may include forming a pixel portion of the first substrate. Forming a gate electrode on the first substrate, depositing a first insulating film on the first substrate, forming an active pattern including an active layer on a pixel portion of the first substrate, and electrically forming a predetermined region of the active layer Forming a source electrode and a drain electrode to be connected, and forming a common voltage wiring at an outer portion of the pixel; a pixel portion contact hole exposing a portion of the drain electrode on the first substrate and a portion of the common voltage wiring; Forming a second insulating layer having an outer contact hole formed therein, and draining the pixel portion of the first substrate through the pixel contact hole It may comprise the steps and forming a metal pattern for a common voltage supply to be connected through the contact hole portion outside the pixel to the common voltage line and electrically to form a pixel electrode connected to the electrode and electrically.

In this case, when the pixel electrode is formed in the pixel portion, a connection electrode electrically connected to the common voltage line may be formed in the pixel outer portion through the pixel outer contact hole.

Hereinafter, the present invention will be described in detail.

1 is a plan view schematically showing the structure of a liquid crystal display panel of the present invention.

As shown in the drawing, the liquid crystal display panel includes a liquid crystal layer formed between the color filter substrate 105 and the array substrate 110 and the color filter substrate 105 and the array substrate 110. Not shown).

The array substrate 110 is arranged horizontally and horizontally on the substrate 110 to define a plurality of gate lines 116 and data lines 117, and the gate lines 116 and data lines 117. And a thin film transistor (not shown), which is a switching element formed in the intersection region of the pixel, and a pixel electrode (not shown) formed in the pixel region.

In addition, one long side and one end side of the array substrate 110 protrude relative to the color filter substrate 105 so that a driving circuit unit for driving the liquid crystal display panel is positioned. The gate pad part 124 is formed on one protruding short side of the 110 and the data pad part 123 is formed on one protruding one side of the protruding side.

In this case, the gate pad unit 124 supplies a scanning signal supplied from the gate driving circuit unit (not shown) to the gate line 116 of each pixel region of the pixel portion, which is the image display region 125, The data pad unit 123 supplies image information supplied from a data driving circuit unit (not shown) to the data line 117 of the pixel area.

In addition, although not shown in the drawing, the image display area 125 of the color filter substrate 105 includes a color filter for implementing color and a common electrode that is opposite to the pixel electrode formed on the array substrate 110.

The color filter substrate 105 and the array substrate 110 configured as described above are provided with a cell gap so as to be uniformly spaced apart by a spacer (not shown), and the outer surface of the image display area 125 is provided. The seal patterns 140 may be bonded to each other to form a unit liquid crystal display panel. At this time, the bonding of the two substrates 105 and 110 is performed through a bonding key (not shown) formed in the color filter substrate 105 and the array substrate 110.

Meanwhile, the common voltage supply metal pattern 170 according to the present invention is formed outside the image display region 125 of the array substrate 110 to be connected to the common electrode of the color filter substrate 105.

That is, in order to apply a common voltage to the common electrode of the color filter substrate 105, the common voltage supply metal pattern 170 formed on the array substrate 110 is used instead of the silver dot pattern as in the prior art. At this time, the common electrode of the color filter substrate 105 bonded to the common voltage supply metal pattern 170 and the array substrate 110 is melted by partially melting the surface of the common voltage supply metal pattern 170 using a laser. Electrical connection.

In this case, although the common voltage supply metal pattern 170 is formed in a circle shape, it may be configured in various forms such as rectangular, square, triangular, or indefinite.

In the drawing, the common voltage supplying metal pattern 170 is formed at one edge of the image display area 125, that is, at four corners of the outer portion of the color filter substrate 105 bonded to the array substrate 110. However, the present invention is not limited thereto, and a plurality of common voltages are formed along the periphery of the image display area 125 such that a common voltage is equally applied to the common electrode of the color filter substrate 105. You may.

FIG. 2 is a schematic cross-sectional view taken along line II ′ of the liquid crystal display panel illustrated in FIG. 1, illustrating an outer portion of the image display area to which the common voltage supply metal pattern and the common electrode are connected.

As shown in the drawing, the liquid crystal display panel is bonded so that the color filter substrate 105 and the array substrate 110 face each other so as to have a predetermined gap by the spacer 150 and the seal pattern 140. The liquid crystal layer 160 is formed in the gap between the 105 and the array substrate 110.

In this case, although not shown in the drawing, in the image display area of the array substrate 110, a gate line to which a scan signal is applied through an external gate pad unit and a data line to which image information is applied through a data pad unit are orthogonal to each other. The thin film transistor for switching the liquid crystal cell and the pixel electrode connected to the thin film transistor are formed in the cross region.

In addition, a liquid crystal layer is formed in the image display area of the color filter substrate 105 together with a color filter (not shown) applied to the cell area by a black matrix (not shown) and a pixel electrode formed on the array substrate 110. The common electrode 108 for driving the 160 is provided.

In this case, a common voltage line 139 for applying a common voltage to the common electrode 108 formed on the color filter substrate 105 is formed on the array substrate 110, and the color filter substrate 105 or the array is provided. The common voltage line 139 and the common electrode 108 are electrically connected to each other through the common voltage supply metal pattern 170 formed on the substrate 110.

The common voltage wiring 139 may be formed together when forming the gate wiring or the data wiring of the array substrate 110, and the common voltage supply metal pattern 170 may be connected to the common voltage wiring 139. It can be formed on the color filter substrate 105 or the array substrate 110, irrespective of its structure and its manufacturing method, as long as it is electrically connected.

Hereinafter, the manufacturing process of the array substrate on which the thin film transistor is formed with respect to the common voltage supply metal pattern will be described in detail.

First, an array substrate on which the thin film transistor is formed will be described in detail with reference to the accompanying drawings.

FIG. 3 is a diagram illustrating a part of an array substrate of the liquid crystal display panel illustrated in FIG. 1. In an actual liquid crystal display panel, N gate lines and M data lines cross each other, and there are NxM pixels, but the description will be simplified. For the sake of illustration, only one pixel is shown.

As shown in the drawing, the array substrate includes a pixel electrode 118 formed on a pixel region, a gate line 116 and a data line 117 vertically and horizontally arranged on the substrate, and the gate line 116 and a data line. It consists of a thin film transistor which is a switching element formed in the intersection area | region of 117. As shown in FIG.

The thin film transistor includes a gate electrode 121 connected to the gate line 116, a source electrode 122 connected to the data line 117, and a drain electrode 123 connected to the pixel electrode 118. In addition, the thin film transistor includes a first insulating film (not shown) for insulating the gate electrode 121 and the source / drain electrodes 122 and 123 and a source electrode 122 by a gate voltage supplied to the gate electrode 121. ) And an active layer 124 forming a conductive channel between the drain electrode 123 and the drain electrode 123.

In this case, a second insulating film (not shown) having a contact hole 140 is formed on the drain electrode 123, and the drain electrode 123 and the pixel electrode 118 are electrically connected to each other through the contact hole 140. Will be connected.

Hereinafter, a manufacturing process of the liquid crystal display panel including the metal pattern for common voltage supply of the present invention will be described in detail with reference to FIGS. 4A to 4G.

4A through 4G are cross-sectional views sequentially illustrating a manufacturing process of an array substrate according to an exemplary embodiment of the present invention, and on the left side, a process of manufacturing an array substrate of a common electrode connecting portion in which a common voltage supply metal pattern of the present invention is located is shown. The right side shows the process of manufacturing the thin film transistor of a pixel part.

In particular, on the right side of the drawing, the manufacturing process of the array substrate including the thin film transistor is sequentially shown along the line III-III 'of the array substrate shown in FIG.

First, as shown in FIG. 4A, a common voltage line 139 is formed on a common voltage connection portion of a substrate 110 made of a transparent insulating material such as glass, and a gate electrode 121 is formed on a pixel portion.

At this time, the common voltage wiring 139 receives a common voltage from a driving circuit unit (not shown) to apply a common voltage to a common electrode of a color filter substrate (not shown) through the metal pattern for common voltage supply of the present invention. Play a role.

On the other hand, the gate electrode 121 and the common voltage wiring 139 is low resistance such as aluminum or aluminum alloy by using a physical vapor deposition (PVD) method such as sputtering on the substrate 110 The metal material may be deposited and patterned by wet etching or dry etching.

Next, as shown in FIG. 4B, a first insulating film 115A, which is a gate insulating film, is deposited on the entire surface of the substrate 110 on which the gate electrode 121 and the common voltage wiring 139 are formed.

In this case, to form an active pattern in the pixel portion of the array substrate 110, as shown in FIG. 4C, the amorphous silicon thin film 124 is sequentially formed on the substrate 110 on which the first insulating film 115A is deposited. And n + amorphous silicon thin film 125.

Thereafter, the n + amorphous silicon thin film 125 and the amorphous silicon thin film 124 are patterned to form an active layer 124 that is used as a channel layer of the thin film transistor, wherein the n + amorphous silicon thin film 125 is the active It is formed for the ohmic contact between a predetermined region (ie, source / drain region) of the layer 124 and the source / drain electrode.

Next, as illustrated in FIG. 4D, the conductive metal material is deposited on the entire surface of the array substrate 110, and then the pixel portion in which the active layer 124 is formed by patterning the conductive metal using a photolithography process. The source electrode 122 and the drain electrode 123 are electrically formed in the source / drain regions.

In this case, the n + amorphous silicon thin film 125 formed on the active layer 124 of the pixel portion is removed through an etching process using the source / drain electrodes 122 and 123 as a mask.

A portion of the conductive metal constituting the source electrode 122 forms a data line 117 to which an image signal is applied from the driving circuit unit.

Next, as shown in FIG. 4E, a second insulating film 115B, which is an interlayer insulating film, is deposited on the entire surface of the substrate 110.

The second insulating film 115B may be formed of an inorganic insulating film such as a silicon oxide film or a silicon nitride film, and an organic insulating film such as benzocyclobutene (BCB) having a low dielectric constant is formed on the inorganic insulating film to achieve high opening ratio. You may.

Thereafter, a portion of the contact portion contact hole 140P exposing a portion of the common voltage line 139 is removed by removing a portion of the second insulating layer 115B and the first insulating layer 115A of the common electrode connecting portion using a photolithography process. At the same time, a portion of the second insulating layer 115B of the pixel portion is removed to form a contact hole 140 exposing a portion of the drain electrode 123.

Next, as shown in FIG. 4F, indium tin oxide (ITO) or indium zinc oxide (IZO) is disposed on the entire surface of the array electrode 110 of the common electrode connecting portion and the pixel portion. After depositing a transparent conductive material, such as a photolithography process, a connection electrode 118P is formed in the common electrode connection portion to be electrically connected to the common voltage wiring 139 through the contact portion contact hole 140P. A pixel electrode 118 electrically connected to the drain electrode 123 through the contact hole 140 is formed in the portion.

On the other hand, in the present embodiment, when the pixel electrode 118 is formed in the pixel portion, a connection electrode 118P is formed in the common electrode connection portion to connect the common voltage wiring 139 and the metal pattern for common voltage supply. However, the present invention is not limited thereto and may be configured such that the metal pattern for supplying the common voltage is directly connected to the common voltage line 139 without forming the connection electrode 118P.

Next, as illustrated in FIG. 4G, a conductive metal material is deposited on the substrate 110 and then electrically connected to the common voltage wiring 139 through the connection electrode 118P at the common electrode connection unit using a photolithography process. A common voltage supply metal pattern 170 is formed to be connected.

In this case, the common voltage supply metal pattern 170 may be formed of a low resistance metal material such as molybdenum and aluminum used to form a metal wire such as a gate wire or a data wire.

Subsequently, although not shown in the drawing, a protective film is formed on the entire surface of the substrate 110 using a transparent organic insulating material such as benzocyclobutene (BCB) or acrylic resin (resin), and then the entire surface of the substrate 110. The alignment film is formed on the substrate.

In this case, as the rubbing of the alignment layer, an optical alignment using Ultra Violet (UV) may be used in consideration of the thickness of the common voltage supply metal pattern 170 according to the present invention.

Meanwhile, in the present embodiment, the common voltage wiring is formed in the step of forming the gate wiring on the array substrate to be connected to the common voltage supply metal pattern through the second contact hole, but the present invention is not limited thereto. The common voltage line may be formed at the step of forming a data line to connect the common voltage line to the common voltage supply metal pattern through the second contact hole.

The common voltage line may be formed in the pixel electrode forming step to directly connect the common voltage supply metal pattern on the common voltage line.

On the other hand, the array substrate configured as described above is bonded by the color filter substrate formed in the color filter process different from the array process and the seal pattern formed on the outside of the image display area to form a unit liquid crystal display panel. According to the present invention, the common voltage supply metal pattern formed on the array substrate is connected to the common electrode of the color filter substrate.

FIG. 5 is a cross-sectional view illustrating a liquid crystal display panel formed by bonding the array substrate and the color filter substrate illustrated in FIG. 4G.

As shown in the drawing, the array substrate 110 on which the common voltage supply metal pattern 170 is formed and the color filter substrate 105 formed in a color filter process different from the array process are bonded to form a unit liquid crystal display panel. Doing.

In this case, a wavelength band specific to the surface of the common voltage supply metal pattern 170 (that is, the surface of the common voltage supply metal pattern 170 in contact with the common electrode 108 of the color filter substrate 105) may be obtained. The laser beam 190 may be irradiated to melt the surface of the metal pattern 170 by a predetermined amount so as to be connected to the common electrode 108.

In this way, the color filter substrate and the array substrate are directly connected by using a laser, that is, a low-resistance metal material such as the common voltage supply metal pattern is directly connected to the common electrode, thereby improving the electrical conductivity compared to the conventional silver dot. The driving failure is reduced.

On the other hand, the energy of the laser used in the present invention may use a laser energy that is weaker than the energy used in the repair process, that is, the energy that is instantaneously applied to cut the metal film. In other words, when looking at the repaired metal film, the surface may be weakly melted. Therefore, if a laser beam of energy lower than the energy used in the repair process is used, the surface of the metal pattern for common voltage supply may be melted. It can be connected to the common electrode.

At this time, in the present invention, the surface of the metal pattern is melted using a Yttrium Aluminum Garnet (YAG) laser having a wavelength of about 0.45 to 2.5 μm and connected to the common electrode, but the present invention is not limited thereto. Any laser can be used that has enough energy to melt and connect to the common electrode.

Meanwhile, in the present embodiment, the case in which the common voltage supply metal pattern is formed on the array substrate is described as an example. However, the present invention is not limited thereto, and the common voltage supply metal pattern is formed on the color filter substrate. Applicable

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

As described above, the liquid crystal display panel according to the present invention uses a laser to directly conduct the color filter substrate and the array substrate, that is, a low resistance metal material such as a metal pattern for common voltage supply is directly connected to the common electrode. Compared to the use of silver dots, it is possible to obtain an effect of reducing the driving failure due to the improvement of the electrical conductivity.

In addition, a problem such as a cell gap defect can be prevented by using the metal of the substrate itself, that is, the common voltage supply metal pattern as described above, for the electrical conduction between the color filter substrate and the array substrate. That is, since the height of the common voltage supply metal pattern is uniformly patterned during the formation process compared with the conventional silver dot, the cell gap defect is reduced compared with the conventional.

In addition, the use of a laser enables conduction between the color filter substrate and the array substrate with a short irradiation time at an accurate position, which has the advantage of being able to cope with the current trend of increasing the size of the liquid crystal display panel.

1 is a plan view schematically showing the structure of a liquid crystal display panel of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line II ′ of the liquid crystal display panel illustrated in FIG. 1.

FIG. 3 is an exemplary view illustrating a portion of an array substrate of the liquid crystal display panel illustrated in FIG. 1.

4A to 4G are cross-sectional views sequentially illustrating a manufacturing process of an array substrate according to an exemplary embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a liquid crystal display panel formed by bonding the array substrate and the color filter substrate illustrated in FIG. 4G.

** Explanation of symbols for main parts of drawings **

105: color filter substrate 108: common electrode

110: array substrate 139: common voltage wiring

140: seal pattern 150: spacer

160: liquid crystal layer 170: common voltage supply metal pattern

190: laser beam

Claims (12)

A first substrate and a second substrate divided into a pixel portion that is an image display area and a pixel outer portion that is an image non-display area; A plurality of gate lines and data lines arranged on the first substrate and defining a plurality of pixel regions in the pixel portion by crossing vertically and horizontally; A pixel electrode formed on each pixel area; Switching elements formed in the pixel areas; A common electrode formed on the second substrate; And And a metal pattern formed at an outer periphery of the pixel of the first substrate and connected to a common electrode of the second substrate to supply a common voltage. The liquid crystal device of claim 1, further comprising a gate driver circuit part and a data driver circuit part installed at an outer periphery of the first substrate to supply a gate signal and a data signal to the gate line and the data line, respectively. Display panel. The liquid crystal display panel of claim 2, further comprising a common voltage wiring connected to the data driver circuit portion or the gate driver circuit portion to receive a common voltage and apply the common voltage to the metal pattern. The liquid crystal display panel of claim 1, wherein the metal pattern is formed at at least one corner of an outer periphery of the pixel portion of the first substrate. The liquid crystal display panel of claim 1, wherein the metal pattern is made of a low resistance metal material such as molybdenum or aluminum. The liquid crystal display panel of claim 1, wherein the metal pattern has a height equal to a cell gap thickness between the first substrate and the second substrate. Providing a first substrate and a second substrate divided into a pixel portion and a pixel outer portion; Forming a switching element in a pixel portion of the first substrate and forming a common voltage supply metal pattern in an outer portion of the pixel of the first substrate; Forming a common electrode on the second substrate; Bonding the first substrate and the second substrate to each other; And And melting the metal pattern for common voltage supply of the first substrate to connect the metal pattern and the common electrode of the second substrate. The method of claim 7, wherein the surface of the common voltage supply metal pattern is melted using a laser and connected to the common electrode. The method of claim 8, wherein the laser uses a yag laser having a wavelength of about 0.45 to 2.5 μm. The method of claim 7, wherein the forming of the switching element and the common voltage supply metal pattern on the first substrate is performed. Forming a gate electrode on the pixel portion of the first substrate and forming a common voltage line on the outer portion of the pixel; Depositing a first insulating film on the first substrate; Forming an active pattern including an active layer on the pixel portion of the first substrate; Forming a source electrode and a drain electrode electrically connected to a predetermined region of the active layer; Forming a second insulating layer having a pixel portion contact hole exposing a part of the drain electrode and a pixel outer contact hole exposing a part of the common voltage wiring on the first substrate; Forming a pixel electrode electrically connected to the drain electrode through the pixel portion contact hole in the pixel portion of the first substrate; And And forming a common voltage supply metal pattern electrically connected to the common voltage line through the pixel outer contact hole. The method of claim 7, wherein the forming of the switching element and the common voltage supply metal pattern on the first substrate is performed. Forming a gate electrode on the pixel portion of the first substrate; Depositing a first insulating film on the first substrate; Forming an active pattern including an active layer on the pixel portion of the first substrate; Forming a source electrode and a drain electrode electrically connected to a predetermined region of the active layer, and forming a common voltage wiring at an outer portion of the pixel; Forming a second insulating layer having a pixel portion contact hole exposing a part of the drain electrode and a pixel outer contact hole exposing a part of the common voltage wiring on the first substrate; Forming a pixel electrode electrically connected to the drain electrode through the pixel portion contact hole in the pixel portion of the first substrate; And And forming a common voltage supply metal pattern electrically connected to the common voltage line through the pixel outer contact hole. 12. The method of claim 10 or 11, wherein when the pixel electrode is formed in the pixel portion, a connecting electrode electrically connected to the common voltage line through the pixel outer contact hole is formed in the pixel outer portion. Method of manufacturing a liquid crystal display panel.