JPH07152043A - Liquid crystal display panel and method for packaging to this panel - Google Patents

Abstract

PURPOSE:To easily take a countermeasure against static electricity through panel process stages and an LSI chip packaging stage even if the liquid crystal display panel deals with COG packaging and LSI chips for driving liquid crystals are packaged on all the sides thereof. CONSTITUTION:Signal wirings 1b extending outward from the display region of the liquid crystal display panel 1 of the liquid crystal display panel formed by directly packaging the LSI pair chips 2 for driving liquid crystals on the liquid crystal display panel 1 are further extended outward from electrodes 1c facing the output terminals of the LSI pair chips 2 for driving liquid crystals and are all connected to common patterns 1d formed to pass the lower parts of the packaging parts of the LSI pair chips 2 for driving liquid crystals along the outer periphery of the panel. In addition, the parts 1e between the electrodes 1c and the common patterns 1d are cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel and a method of mounting the same on a liquid crystal display panel. Can be applied to
In particular, a liquid crystal display panel that is compatible with COG (Chip On Glass) mounting and that can easily take measures against static electricity through a panel process step and an LSI chip mounting step even when a liquid crystal driving LSI chip is mounted on all sides And a mounting method on the panel.

In recent years, the TAB mounting liquid crystal display panel and the COG mounting liquid crystal display panel on only one of the opposite sides can easily form and remove a common conductor pattern for countermeasures against static electricity. Have advantages. However, particularly in the latter liquid crystal display panel for COG mounting, when the liquid crystal driving LSI bare chips are mounted on both sides facing each other, the signal wiring pattern cannot be drawn out to the end of the panel. There is a problem that it becomes difficult to remove.

Therefore, there is provided a liquid crystal display panel which is compatible with COG mounting and which can easily take measures against static electricity through a panel process step and an LSI chip mounting step even when a liquid crystal driving LSI chip is mounted on all sides. Is required.

[0004]

2. Description of the Related Art In a conventional liquid crystal display panel for TAB mounting, since a signal wiring pattern can be taken out straight up to the panel end portion, as shown in FIG. A common conductor pattern 101 for preventing static electricity of about 2 to 0.5 mm is electrically connected to the TAB mounting electrode terminals 102, which are all signal wiring patterns, and when the panel is completed, the panel substrate end surface 10 is formed.
The conductor pattern 101 is also removed when polishing 3 is performed.

Further, in the conventional liquid crystal display panel for mounting COG, the signal wiring pattern is the LS for driving the liquid crystal on the panel.
Although it extends to the position of the I output terminal electrode, it has a configuration in which it cannot be pulled out to the end of the panel. Therefore,
If the LSI is not mounted on the opposite side of the LSI mounting side,
As shown in FIG. 13, a liquid crystal driving LSI bare chip 11
The same non-electrostatic common conductor pattern 101 as that shown in FIG. 12 is provided on one non-mounting side, and is removed collectively at the time of polishing the panel end surface, or the protruding glass substrate portion 112 is scribed to make the conductor pattern 101 a signal. It is configured to be separated from the wiring pattern. In FIG. 13, 113 of the LSI 111 is a signal output terminal electrode.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The mounting liquid crystal display panel and the COG mounting liquid crystal display panel on only one side of the opposite sides have an advantage that the common conductor pattern 101 for countermeasures against static electricity can be easily formed and removed. COG of the latter
In the mounting liquid crystal display panel, when the liquid crystal driving LSI bare chips 111 are mounted on both sides facing each other, the signal wiring pattern 102 cannot be pulled out to the panel end portion as described above. There is a problem that it is difficult to remove.

Even if it is possible to implement countermeasures against static electricity in the panel manufacturing process, a signal for displaying an image cannot be applied to the panel if the signal wiring is still connected to the common pattern (because of the short circuit). Therefore, the above-mentioned measures against static electricity must be removed at the time of the panel display test. in this way,
If the measures against static electricity are removed during the panel display test, static electricity measures will not be taken during the process of mounting the liquid crystal drive LSI. Here, even if the panel display test can be performed with the electrical countermeasures left, the conventional method of removing the electrical countermeasures by laser cutting the portion where the liquid crystal driving LSI chip is COG mounted is as follows. Considering the damage to the LSI chip by the laser beam, after all, during the liquid crystal drive LSI mounting process,
Static electricity is not taken.

Therefore, the present invention is compatible with COG mounting, and even when a liquid crystal driving LSI chip is mounted on all sides, a liquid crystal which can easily take measures against static electricity through a panel process step and an LSI chip mounting step. The purpose is to provide a display panel.

[0009]

The invention according to claim 1 is
In a liquid crystal display panel in which a liquid crystal driving LSI bare chip is mounted on a liquid crystal display panel, signal wirings extending outward from a display area of the liquid crystal display panel are further provided than electrodes facing output terminals of the liquid crystal driving LSI bare chip. It is characterized in that it is connected to a common pattern formed so as to extend to the outside and pass under the mounting portion of the liquid crystal driving LSI bare chip along the outer periphery of the panel.

According to a second aspect of the invention, a liquid crystal driving LSI is provided.
In a liquid crystal display panel in which a bare chip is mounted on a liquid crystal display panel, on a signal wiring extending outward from a display area of the liquid crystal display panel, and between the display area of the liquid crystal display panel and the liquid crystal driving LSI bare chip mounting portion. It is characterized in that an electrode portion is formed between them. The invention according to claim 3 is characterized in that it is configured to have both of the above-mentioned claim 1 and claim 2.

The invention according to claim 4 is the above-mentioned claim 2, 3
In the invention described above, an insulating layer is formed on the signal wiring, and an electrode portion of the insulating layer facing the output terminal of the liquid crystal driving LSI bare chip has an opening portion, and the insulating layer is formed from the opening portion. It is characterized in that a conductor pattern is formed on the upper side of the signal wiring to the electrode portion.

The invention according to claim 5 is the above-mentioned claim 1,
In the inventions 3 and 4, the common pattern is connected to at least one or more liquid crystal driving LSI bare chip mounting portions on the side of the electrode terminals for supplying power and signals to the liquid crystal driving LSI bare chips. It is characterized by. The invention according to claim 6 is the above-mentioned claim 1,
In the inventions 3 and 4, the common pattern is electrically insulated from each side of the panel, and probing electrodes are formed at both ends of each common pattern or at a plurality of places including both ends. It is characterized by.

According to a seventh aspect of the present invention, in the above-mentioned sixth aspect of the present invention, all the adjacent signal wirings are alternately extended toward different sides so as not to be connected to the same common pattern. It is characterized by that. The invention according to claim 8 is a method for mounting a liquid crystal driving LSI bare chip on the liquid crystal display panel according to any one of claims 1 and 3 to 7, wherein the liquid crystal driving LSI bare chip is mounted on the liquid crystal panel. Before mounting, the method includes a step of cutting the signal wiring with a cutting portion provided between the electrode and the common pattern.

According to a ninth aspect of the present invention, in the above-described eighth aspect, the step of cutting the cutting portion is performed by laser light from the back surface of the liquid crystal display panel. According to a tenth aspect of the present invention, the liquid crystal display panel according to any one of the second to seventh aspects has a liquid crystal driving LSI
A method for mounting a bare chip, comprising:
During the step of mounting the SI bare chip on the liquid crystal panel, a conductor is brought into contact with the electrode portion to electrically connect the plurality of electrode portions.

[0015]

According to the first aspect of the present invention, as shown in FIGS. 1 to 3 of the first embodiment described later, the signal wiring 1b extending outward from the effective display area 1a of the liquid crystal display panel 1 is connected to the liquid crystal driving LSI bare chip. All of them are connected to a common conductor pattern 1d formed to extend further outward than the electrode terminal 1c facing the output terminal 2a of 2 and pass under the mounting portion of the liquid crystal driving LSI bare chip 2 along the outer periphery of the panel. Further, after the panel is completed, the laser cut line 1e between the electrode terminal 1c and the common conductor pattern 1d is cut by a laser. Therefore, before the laser light irradiation, each signal wiring 1b is extended to the side opposite to the effective display area 1a, and all the common wiring patterns 1d are formed.
Since it can be electrically connected to, it can be made sufficiently strong against static electricity generated in the panel process step.

According to the second aspect of the invention, as shown in FIGS. 4 and 5 of the second embodiment described later, on the signal wiring 1b extending outward from the effective display area 1a of the liquid crystal display panel 1,
In addition, the electrode terminal 1f having a length of about 0.5 to 1 mm is formed between the upper substrate of the liquid crystal display panel 1 and the liquid crystal driving LSI bare chip 2 mounting portion. For this reason,
Since the electrode terminal 1f is provided on the signal wiring 1b,
Even in the process of mounting the LCD drive LSI bare chip 2,
It is possible to electrically connect all the signal wirings 1b, and it is possible to easily obtain a panel that is sufficiently resistant to static electricity generated during the mounting process.

According to the third aspect of the present invention, as shown in FIG. 7 of the fourth embodiment, which will be described later, the invention is configured to have both of the first and second aspects. It is possible to obtain a panel having both the effects of the invention of claim 1 and the invention of claim 2. In the invention described in claim 4, as shown in FIG. 6 of Embodiment 3 described later, the insulating layer 1g is formed on the signal wiring 1b, and the electrode terminal 1 facing the output signal electrode terminal 2a of the liquid crystal driving LSI bare chip 2 is formed.
A hole is made in the insulating layer 1g only in the c portion, and the conductor pattern 1h is formed in the hole along the signal wiring 1b to the electrode terminal 1f portion. Therefore, even if electrolytic corrosion or the like occurs in the electrostatic discharge countermeasure electrode terminal 1f for some reason, the influence of the electrolytic corrosion affects only the conductor pattern 1h that is not related to the display of the liquid crystal display panel 1. Therefore, the signal wiring 1b in the electrode terminal 1f portion can be less likely to be electrically corroded and less likely to be broken, and the reliability can be improved.

In a fifth aspect of the invention, as shown in FIG. 7 of a fourth embodiment described later, a common conductor pattern 1d formed along the outer periphery of the panel is mounted on at least one liquid crystal driving LSI bare chip 2 mounting portion. The liquid crystal driving LSI bare chip 2 is connected to the power supply and signal supply electrode terminal portion 1i side. Therefore, the one-side lighting display test for each block can be performed by applying the display signal to the terminal portion 1i at the same time as the countermeasure against static electricity is taken.

According to the sixth aspect of the invention, as shown in FIG. 8 of the fifth embodiment described later, the common conductor pattern 1d formed along the outer periphery of the panel can be electrically insulated from each side of the panel when the panel is completed. In this way, the conductor pattern 1j for probing is arranged at both ends of each common conductor pattern 1d or at a plurality of positions including both ends. Therefore, by dividing the common conductor pattern 1d for each side of the panel and providing the electrode terminals 1j on each side, it is only necessary to stand several to ten or more probe pins on the electrode terminals 1j in combination with measures against static electricity. A simple display test can be performed.

According to a seventh aspect of the invention, as shown in FIG. 9 of a sixth embodiment described later, all the adjacent signal wirings 1b are alternately formed so as not to be connected to the same common conductor pattern 1d, and the liquid crystal driving is performed. The laser LSI bare chip 2 is cut by a laser through the glass substrate of the signal wiring 1b on the side where it is not mounted. For this reason, different signals can be output every other signal line in the horizontal direction during a simple display test of the panel, so that a short circuit of the signal line can be confirmed.

According to an eighth aspect of the invention, there is provided a method of mounting a liquid crystal driving LSI bare chip on the liquid crystal display panel according to any one of the first to third aspects, wherein the liquid crystal driving LSI bare chip is mounted on the liquid crystal driving LSI bare chip. 8. The method according to claim 1, 3 or 7, wherein the signal wiring is cut by a cutting portion provided between the electrode and the common pattern before being mounted on a liquid crystal panel. The same effect as the invention can be obtained.

According to a ninth aspect of the invention, in the invention of the eighth aspect, the step of cutting the cutting portion is configured to be performed by laser light from the back surface of the liquid crystal display panel. The same effects as those of the invention described in 8 can be obtained. According to a tenth aspect of the invention, there is provided a method of mounting a liquid crystal driving LSI bare chip on the liquid crystal display panel according to any of the second to seventh aspects, wherein the liquid crystal driving LS is used.
8. The method of claim 2, wherein a conductor is brought into contact with the electrode portion to electrically connect the plurality of electrode portions during a mounting process of the I bare chip on the liquid crystal panel. The same effect as the invention can be obtained.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a diagram showing an overall configuration of a liquid crystal display panel according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view showing a configuration of a portion A shown in FIG. 1, and FIG. It is an enlarged view which shows the structure after laser cutting of the A section shown in FIG. here,
The characteristic part according to claims 1 and 8 will be specifically described. Figure 1
3 to 3, 1 is a liquid crystal display panel, 1a is an effective display area of the liquid crystal display panel 1, and 1b is a liquid crystal display panel 1 which extends outward from the effective display area 1a of the liquid crystal display panel 1. Is a signal wiring for transmitting a signal, 1c is an electrode terminal on the panel 1 facing the output terminal of the liquid crystal driving LSI bare chip 2, and the electrode terminal 1c is connected to the signal wiring 1b. Then 1
d is a common conductor pattern for static electricity countermeasures, and the signal wiring 1
All of the electrodes b are connected on the opposite side of the effective display area 1a with the electrode terminals 1c interposed therebetween, and pass under the liquid crystal driving LSI bare chip 2 mounting portion to circulate the panel 1. 1e is a laser cut line of the signal wiring 1b between the electrode terminal 1c and the common conductor pattern 1d, which is cut by irradiating a laser beam along the laser cut line 1e as shown in FIG. 2 after finishing the panel process step. By doing so, as shown in FIG. 3, the signal wiring 1b and the common conductor pattern 1d are electrically separated.

Thus, in this embodiment (claim 1),
In the liquid crystal display panel in which the liquid crystal driving LSI bare chip 2 is directly mounted on the liquid crystal display panel 1,
The signal wiring 1b extending outward from the effective display area 1a is further extended outside the electrode terminal 1c facing the output terminal of the liquid crystal driving LSI bare chip 2 so that the liquid crystal driving LSI bare chip extends along the outer periphery of the panel. The laser cut line 1 is connected to the common conductor pattern 1d formed so as to pass through the lower part of the mounting portion 2 and is located between the electrode terminal 1c and the common conductor pattern 1d after the panel is completed.
It is configured such that e is cut by a laser. Therefore, before the laser light irradiation, each signal wiring 1b can be extended to the side opposite to the effective display area 1a and electrically connected to all the common conductor patterns 1d, which occurs in the panel process step. It can be made sufficiently strong against static electricity.

(Embodiment 2) Next, FIG. 4 is a partial view showing the configuration of the panel upper surface (corresponding to the portion A in FIG. 1) of the liquid crystal display panel according to Embodiment 2 of the present invention, and FIG. It is a figure which shows the structure at the time of LSI chip mounting of the liquid crystal display panel of Examples 2 and 10 which concerns on invention. Here, the characteristic portion according to claim 2 will be specifically described. 4 and 5, the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding portions, and 1f is the signal wiring 1.
b provided between the upper substrate of the liquid crystal display panel 1 and the liquid crystal driving LSI bare chip 2 mounting portion.
Electrode terminal for measures against static electricity of about 5 to 1 mm, 1 g
Is an insulating layer functioning as a protective film formed on the signal wiring 1b, 2 is a liquid crystal driving LSI bare chip, and 2a is a metal protrusion such as gold formed on the surface of the liquid crystal driving LSI bare chip 2. Liquid crystal driving LSI is an output signal electrode terminal of the bare chip 2, and 3 is a liquid crystal driving LSI.
This is a bonding head for heating and pressing the bare chip 2 to connect the liquid crystal driving LSI bare chip 2 to the liquid crystal display panel 1 via a thermosetting resin film or the like. Reference numeral 4 has an elongated shape along each side of the liquid crystal display panel 1, and in the process in which static electricity is easily generated, the signal wiring 1b is electrically connected to the electrode terminal 1f for static electricity countermeasures by contact. The conductive rubber 4 is for applying pressure, and 5 is a pressure head for applying a load so that the conductive rubber 4 is electrically and sufficiently connected to the electrode terminal 1f. Although not shown here, in the present invention, all the signal wirings 1b are electrically connected by applying a paste-like conductive resin so as to surround the liquid crystal panel along the electrode terminals 1f. It may be configured as follows.

Thus, in the present embodiment (claim 2),
In the liquid crystal display panel in which the liquid crystal driving LSI bare chip 2 is directly mounted on the liquid crystal display panel 1,
0.5 m to 1 m on the signal wiring 1b extending outward from the effective display area 1a and between the upper substrate of the liquid crystal display panel 1 and the liquid crystal driving LSI bare chip 2 mounting portion.
The electrode terminal 1f of about m is formed.

Therefore, the electrode terminal 1f is provided on the signal wiring 1b.
Since it is provided with the configuration, the liquid crystal drive LSI bare chip 2
Even in the mounting step, all the signal wirings 1b can be electrically connected, and a panel sufficiently resistant to static electricity generated during the mounting step can be easily obtained. (Embodiment 3) FIG. 6 is a diagram showing the structure of a liquid crystal display panel according to Embodiment 3 of the present invention. Here, the layer structure of the electrode terminal 1f shown in FIG.
The characteristic part relating to is specifically described. In the liquid crystal display panel of this embodiment, a signal wiring 1b for transmitting a signal for driving the liquid crystal of the liquid crystal display panel 1, an electrode terminal 1c on the panel 1 facing the output terminal of the liquid crystal driving LSI bare chip,
The electrode terminal 1f for preventing static electricity, the insulating layer 1g formed on the signal wiring 1b so as to function as a protective film for the signal wiring 1b, and having a contact hole formed in the electrode terminal 1c portion, and the insulating layer 1g. It is composed of a conductor pattern 1h which is electrically connected to the signal wiring 1b by a contact hole formed on the electrode terminal 1c and extends along the signal wiring 1b from the electrode terminal 1c portion to the static electricity countermeasure electrode terminal 1f portion. . Therefore, even if electrolytic corrosion or the like occurs in the electrostatic discharge countermeasure electrode terminal 1f for some reason, the influence of the electrolytic corrosion affects only the conductor pattern 1h that is not related to the display of the liquid crystal display panel 1. Therefore, the signal wiring 1b in the electrode terminal 1f portion can be less likely to be electrically corroded and less likely to be broken, and the reliability can be improved.

(Embodiment 4) Next, FIG. 7 is a view showing the configuration of the panel upper surface of a liquid crystal display panel of Embodiment 4 according to the present invention, and FIG. 7 (a) corresponds to the portion A shown in FIG. FIG. 7B is an enlarged view showing the configuration of the portion to be cut, and FIG. 7B is an enlarged view showing the configuration of the portion shown in FIG. 7A after laser cutting. Here, the characteristic portions according to claims 3 and 5 will be specifically described.
The present embodiment has both the features of the first and third embodiments, and the common conductor pattern 1d is formed around the liquid crystal display panel 1 so that each mounting portion of one liquid crystal driving LSI bare chip 2 is mounted. It is configured so that it can be taken out of the panel. At this time, the signal is taken out from the liquid crystal driving LSI.
In addition to the conductor pattern 1i formed similarly to the input signal supply electrode terminal to the bare chip 2, the common conductor patterns 1d in this case are electrically connected to each other by the conventional method described above. Although not shown, the common conductor pattern 1d can be taken out of the panel by the LSI chip 1
It may be performed not for each piece but for each piece.

As described above, in the present embodiment (claim 3),
The signal wiring 1b extending outward from the effective display area 1a of the liquid crystal display panel 1 is extended further outward than the electrode terminal 1c facing the output terminal of the liquid crystal driving LSI bare chip 2, and the liquid crystal is extended along the outer periphery of the panel. The laser cut line 1e is connected to the common conductor pattern 1d formed so as to pass under the mounting portion of the drive LSI bare chip 2 and the laser cut line 1e in the portion between the electrode terminal 1c and the common conductor pattern 1d is lasered after the panel is completed. In the liquid crystal display panel in which the liquid crystal drive LSI bare chip 2 is directly mounted on the liquid crystal display panel 1, the signal wiring 1b extending outward from the effective display area 1a of the liquid crystal display panel 1 is formed. 0.5 to 1 mm in length between the upper substrate of the liquid crystal display panel 1 and the liquid crystal driving LSI bare chip 2 mounting portion Configured to be form a time the electrode terminal 1f. Therefore, it is possible to obtain a panel having both the effects of the first embodiment and the effects of the second embodiment, that is, each signal wiring 1b is extended to the side opposite to the effective display area 1a before laser light irradiation. Since all of them can be electrically connected to the common conductor pattern 1d, they can be made sufficiently strong against static electricity generated in the panel process step, and the electrode terminal 1f is provided on the signal wiring 1b. Therefore, even in the mounting process of the liquid crystal driving LSI bare chip 2, all the signal wirings 1b can be electrically connected, and a panel sufficiently resistant to static electricity generated during the mounting process can be easily obtained.

Further, in this embodiment (claim 5), the common pattern 1d formed along the outer periphery of the panel is formed on at least one liquid crystal driving LSI bare chip 2 mounting portion on the liquid crystal driving LSI bare chip 2. Since it is configured to be connected to the power supply and signal supply electrode terminal portion 1i side, it is possible to perform a one-side lighting display test for each block by applying a display signal to the terminal portion 1i at the same time as a countermeasure against static electricity. .

(Embodiment 5) Next, FIG. 8 is a diagram showing the overall structure of a liquid crystal display panel according to Embodiment 5 of the present invention. Here, the characteristic part according to claim 6 will be specifically described.
In this embodiment, the common conductor pattern 1d has a shape in which the liquid crystal display panel is circulated and is divided for each side of the panel, and one or a plurality of electrode terminals are provided for each common conductor pattern 1d divided for each side. 1j is formed and configured. In addition, the electrical connection between the common conductor patterns 1d is as shown in FIG.
Similar to the fourth embodiment, the conventional method described above is performed.

As described above, in the present embodiment (claim 6),
The common conductor pattern 1d formed along the outer periphery of the panel is electrically insulated on each side of the panel when the panel is completed, and the conductors for probing are provided at both ends of each common conductor pattern 1d or at a plurality of positions including both ends. Since the pattern 1i is installed, the common conductor pattern 1
By dividing d into each side and providing the electrode terminals 1j on each side, a simple display test can be performed only by setting several to ten or more probe pins on the electrode terminals 1j together with measures against static electricity. .

(Embodiment 6) Next, FIG. 9 is a diagram showing the overall structure of a liquid crystal display panel according to Embodiment 6 of the present invention. Here, the characteristic portions according to claims 7 and 9 will be specifically described. In this embodiment, in the fifth embodiment shown in FIG. 8, common conductor patterns 1d are provided alternately in the vertical direction on the left and right sides of the panel so that the signal wirings 1b running in the horizontal direction are not connected to the same common conductor pattern 1d. Connect to and configure.
According to this structure, the common conductor pattern 1d vertically provided on the right side of the panel is sandwiched between the two glass substrates.

Therefore, at this time, the laser cut line 1e of the signal wiring 1b on the side where the liquid crystal driving LSI bare chip 2 is not mounted is laser cut from the back surface through the glass substrate. For this reason, different signals can be output every other signal line in the horizontal direction during a simple display test of the panel, so that a short circuit of the signal line can be confirmed.

(Embodiment 7) Next, FIG. 10 is a diagram showing the overall structure of a liquid crystal display panel according to Embodiment 7 of the present invention, and FIG. 11 is a plan view showing the structure of part A shown in FIG. FIG. Here, the characteristic portion according to claim 4 will be specifically described. In this embodiment, the liquid crystal display panel 1
An effective display area 1a of the liquid crystal display panel 1, a signal wiring 1b for transmitting a signal for driving the liquid crystal, and the signal wiring 1
The electrode terminal 1c on the panel which is connected to the liquid crystal driving LSI bare chip 2 and faces the output terminal of the liquid crystal driving LSI bare chip 2 and all of the signal wirings 1d are connected via the electrode terminals 1c. A common conductor pattern 1d for preventing static electricity that is formed so as to pass through the panel and circulate the panel, and the signal wiring 1b and the common conductor pattern 1d by irradiating a laser beam along this line after the panel assembly process is completed. A laser cut line 1e that electrically separates from each other, another antistatic electrode terminal 1f, an insulating layer 1g made of SiN or the like that is formed above the signal wiring 1b and functions as a protective film, and an electrode terminal. 1
In part c, a conductor pattern 1h electrically connected to the signal wiring 1b by a contact hole formed in the insulating layer 1g, a liquid crystal driving LSI bare chip 2, and an electrode terminal portion of the liquid crystal driving LSI bare chip 2 are formed. And an output signal electrode terminal 2a formed of a metal protrusion such as gold. In addition, the electrode terminal 1f for static electricity countermeasures is formed on the conductor pattern 1h. Further, 4 is a conductive rubber, 5 is a head for pressing the conductive rubber 4, 6 is a flexible printed circuit board, and this flexible printed circuit board 6 is a liquid crystal driving LSI bare chip 2
In order to supply a signal to the liquid crystal panel 1, it is connected to the liquid crystal panel 1 by thermocompression bonding or the like.

In this embodiment, since the signal wiring 1b is connected to the common conductor pattern 1d until the liquid crystal display panel is assembled, the non-linear elements arranged on the matrix inside the panel are electrically at the same potential. , Not affected by static electricity. Next, when mounting the liquid crystal driving LSI bare chip, the common conductor pattern 1d and the signal wiring 1 are irradiated with a laser beam along the laser cut line 1e.
b is electrically isolated. This is because the laser beam damages the LSI chip after the LSI chip 2 is mounted. Therefore, as a countermeasure against static electricity when the LSI chip 2 is mounted, another electrostatic countermeasure electrode terminal 1f is used. That is, while mounting the LSI chip 2 while pressing the conductive rubber 4 against all the electrode terminals 1f,
By applying the conductive paste on the electrode terminals 1f in advance, all the signal wirings 1b are set to the same potential to avoid the influence of static electricity. Here, after mounting the LSI chip,
The electrode terminal 1f is exposed and there is a concern that electrolytic corrosion may occur, but even if electrolytic corrosion occurs, the vicinity of the electrode terminal 1c is covered with a connecting resin, and the signal wiring 1b also covers the insulating film 1g.
Since it is covered with, the affected part is the electrode terminal 1f which has no function. As described above, in this embodiment, it is possible to obtain a liquid crystal display panel having high environmental reliability while avoiding the influence of static electricity throughout the manufacturing process and the mounting process of the liquid crystal display panel.

[0037]

According to the present invention, countermeasures against static electricity can be easily performed through the panel process step and the LSI chip mounting step even when the liquid crystal driving LSI chip is mounted on all sides, which is compatible with COG mounting. The effect is that you can do it.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a liquid crystal display panel of Example 1 according to the present invention.

FIG. 2 is an enlarged view showing a configuration of a portion A shown in FIG.

FIG. 3 is an enlarged view showing a configuration of a portion A shown in FIG. 1 after laser cutting.

FIG. 4 is a partial view showing a configuration of a panel upper surface of a liquid crystal display panel of Example 2 according to the present invention.

FIG. 5 is an LS of a liquid crystal display panel according to a second embodiment of the present invention.
It is a figure which shows the structure at the time of I chip mounting.

FIG. 6 is a diagram showing a configuration of a liquid crystal display panel of Example 3 according to the present invention.

FIG. 7 is a diagram showing a configuration of a panel upper surface of a liquid crystal display panel of Example 4 according to the present invention.

FIG. 8 is a diagram showing an overall configuration of a liquid crystal display panel according to a fifth embodiment of the present invention.

FIG. 9 is a diagram showing an overall configuration of a liquid crystal display panel of Example 6 according to the present invention.

FIG. 10 is a diagram showing an overall configuration of a liquid crystal display panel of Example 7 according to the present invention.

11A and 11B are a plan view and a cross-sectional enlarged view showing the configuration of a portion A shown in FIG.

FIG. 12 is a diagram showing a configuration of a conventional TAB mounting type liquid crystal display panel and a liquid crystal display panel whose end faces are polished.

FIG. 13 is a diagram showing a configuration of a conventional COG mounting type liquid crystal display panel and a liquid crystal display panel in which a chip non-mounting side is cut.

[Explanation of symbols]

 1 Liquid Crystal Display Panel 1a Effective Display Area 1b Signal Wiring 1c, 1f, 1j Electrode Terminal 1d Common Conductor Pattern 1e Laser Cut Line 1g Insulating Layer 1h, 1i Conductor Pattern 2 Liquid Crystal Driving LSI Bare Chip 2a Output Signal Electrode Terminal 3 Bonding Head 4 Conductivity Rubber 5 Pressure head 6 Flexible printed circuit board

Front page continued (72) Inventor Toshiaki Sukeda 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (10)

[Claims] 1. A liquid crystal display panel comprising a liquid crystal driving LSI bare chip (2) mounted on a liquid crystal display panel (1),
The signal wiring (1b) extending outward from the display area (1a) of the liquid crystal display panel (1) has the LS for driving the liquid crystal.
The I bare chip (2) is formed to extend further outside the electrode (1c) facing the output terminal (2a) of the I bare chip (2), and passes under the mounting portion of the liquid crystal driving LSI bare chip (2) along the outer periphery of the panel. Common pattern (1
A liquid crystal display panel characterized by being connected to d). 2. A liquid crystal display panel comprising a liquid crystal driving LSI bare chip (2) mounted on a liquid crystal display panel (1),
On the signal wiring (1b) extending outward from the display area (1a) of the liquid crystal display panel (1) and on the display area (1a) of the liquid crystal display panel (1) and the liquid crystal driving LSI.
A liquid crystal display panel, wherein an electrode portion (1f) is formed between the bare chip (2) and a mounting portion. 3. A liquid crystal display panel, characterized in that it has both of claim 1 and claim 2. 4. An insulating layer (1g) on the signal wiring (1b).
And the liquid crystal driving LSI of the insulating layer (1 g)
The bare chip (2) has an opening portion in the electrode (1c) portion facing the output terminal (2a), and the opening is formed on the insulating layer (1g) along the signal wiring (1b). The liquid crystal display panel according to claim 2, wherein a conductor pattern (1h) is formed up to the electrode portion (1f). 5. The common pattern (1d) is at least 1
The liquid crystal driving LSI bare chip (2) mounting portion is connected to each of the liquid crystal driving LSI bare chips (2) on the side of the electrode terminal portion (1i) for supplying power and signals to the liquid crystal driving LSI bare chip (2). Item 3. A liquid crystal display panel according to items 1, 3 and 4. 6. The common pattern (1d) is electrically insulated on each side of the panel, and each common pattern (1d) is electrically insulated.
5. The liquid crystal display panel according to claim 1, 3 or 4, wherein electrodes (1j) for probing are formed at both ends of d) or at a plurality of places including the both ends. 7. The adjacent signal wirings (1b) are alternately extended toward different sides so as not to be connected to the same common pattern (1d). 6. The liquid crystal display panel according to item 6. 8. A method for mounting a liquid crystal driving LSI bare chip (2) on the liquid crystal display panel (1) according to any one of claims 1 and 3 to 7, wherein the liquid crystal driving LS is mounted.
Before the I bare chip (2) is mounted on the liquid crystal panel (1), the signal wiring (1b) is provided with a cutting portion (1) provided between the electrode (1c) and the common pattern (1d).
A bare chip mounting method comprising the step of cutting in e). 9. The method of mounting a bare chip according to claim 8, wherein the step of cutting the cutting portion (1e) is performed by laser light from the back surface of the liquid crystal display panel (1). 10. A method of mounting a liquid crystal driving LSI bare chip (2) on a liquid crystal display panel (1) according to claim 2, wherein the liquid crystal driving LSI bare chip (2) is mounted.
During the step of mounting on the liquid crystal panel (1), the conductor (4) is brought into contact with the electrode part (1f) to electrically connect the plurality of electrode parts (1f). Bare chip mounting method.