JP2010054536A - Liquid crystal display device and manufacturing method thereof - Google Patents

Abstract

Source signal line film peeling, film floating reduction, film peeling, film yield, and quality yield in a manufacturing process caused by cutting of a CF glass substrate positioned above a data signal input terminal An object is to obtain a liquid crystal display device capable of reducing the decrease.
A liquid crystal display device according to an embodiment of the present invention includes a first substrate 8 having a plurality of data signal lines 4 and scanning lines arranged in a matrix on the upper surface, and a first substrate via a liquid crystal 9. And a second substrate 5 having a cut end 20 at a position retracted from the end of the first substrate 8. The data signal line 4 is connected to the second substrate 5. The region corresponding to the lower portion of the cut end portion 20 is formed thinner than the other regions.
[Selection] Figure 1

Description

  The present invention relates to a liquid crystal display device and a method for manufacturing the same.

  In recent years, liquid crystal display devices are used for notebook and desktop personal computers, televisions, monitor mobile phones, and the like. In general, in a liquid crystal display device, a CF (color filter) substrate and a TFT (Thin Film Transistor) substrate are overlapped, and then an unnecessary CF substrate positioned above a signal input terminal formed on the TFT glass substrate is cut. . In general, the CF substrate is cut by inserting a scribe line for cutting into the CF substrate and applying an impact from above. In addition, for other chamfering in which several display panels can be removed from the glass substrate, the chamfering, cutting, and cutting are simultaneously performed (scribe and break process).

  However, when the CF substrate is cut, an impact applied to the CF substrate is transmitted to the source insulating film and the source signal line formed on the TFT substrate, and the source signal line may be peeled off and film floating may occur. The film peeling of the source signal line is a disconnection of the signal line, resulting in a fatal defect in which signal input is impossible. Further, the film floating of the source signal line has a problem that the film is likely to be peeled off by an ultrasonic wave used for cleaning the panel after the liquid crystal is injected, and if it is peeled off, there is a problem that it becomes a fatal defect as described above.

  Therefore, Patent Document 1 below discloses a method for effectively correcting the circuit wiring disconnection after the liquid crystal panel circuit wiring is formed.

JP 2002-328398 A

  However, the above-described film peeling and film floating of the source signal line are not detected in the production factory depending on the degree of the occurrence, and may be detected due to external stress after shipment to the customer. There was a problem of concern. In addition, there is a problem that the yield in the manufacturing process may be reduced due to film peeling and film floating.

  Therefore, the present invention has been made to solve such a problem, and the source signal line film peeling and film floating reduction, which occur later due to the cutting of the CF substrate located above the data signal input terminal, It is another object of the present invention to provide a liquid crystal display device and a method for manufacturing the liquid crystal display device that can reduce a decrease in quality yield in the manufacturing process due to film peeling and film floating.

  A liquid crystal display device according to an embodiment of the present invention includes a first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface, and the upper surface of the first substrate via liquid crystal. And a second substrate having a cut end at a position retracted from the end of the first substrate, and the data signal line is provided below the cut end of the second substrate. The corresponding region is characterized by being formed thinner than other regions.

  A method of manufacturing a liquid crystal display device according to an embodiment of the present invention includes: (a) preparing a first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface; and (b). A step of disposing a second substrate so as to face the upper surface of the first substrate; and (c) positioned above the input terminal of the data signal line and retracted from an end of the first substrate. Cutting the second substrate at a position, wherein, in the step (a), the data signal line has a region corresponding to a lower part of the cut end portion of the second substrate. It is characterized by being formed thinner than the above.

  According to the liquid crystal display device and the manufacturing method thereof according to an embodiment of the present invention, the source signal line formed on the TFT substrate located in the region corresponding to the lower portion of the CF substrate cutting portion is formed thin, so that when the CF substrate is cut The source signal line can be surely peeled off by the impact applied to the CF substrate. Accordingly, it is possible to prevent subsequent processes and subsequent occurrence at the customer.

<Embodiment 1>
1A and 1B are a plan view and a cross-sectional view showing a configuration in the vicinity of a cut portion of a CF glass substrate on the signal input terminal side of the liquid crystal display device according to Embodiment 1 of the present invention. The configuration of the liquid crystal display device in this embodiment is the same as that of a general liquid crystal display device. For example, a liquid crystal panel, a drive circuit unit (not shown) for driving the liquid crystal panel, and a light transmission type can be used. It comprises a light source (not shown) such as a backlight. The liquid crystal panel has a plurality of data signal lines 4 and scanning lines (not shown) arranged in a matrix orthogonal to each other on the upper surface, and thin film transistors (not shown) arranged at intersections of the data signal lines 4 and the scanning lines. 1) CF glass on which an array substrate (TFT glass substrate 8) having pixel electrodes (not shown) arranged via thin film transistors and a counter electrode (not shown) facing the TFT glass substrate 8 are formed. And a liquid crystal material 9 held between the TFT glass substrate 8 and the CF glass substrate 5 via an alignment film (not shown). In the liquid crystal panel, a region in the black matrix 2 becomes a panel display area 3. Here, in the data signal line 4 in the present embodiment, a region corresponding to the lower portion of the cut end portion 20 of the CF glass substrate 5 is formed to be thinner than other regions.

  Next, a method for manufacturing the liquid crystal display device in the present embodiment will be described. First, a plurality of data signal lines 4 and scanning lines arranged orthogonally on the upper surface in a matrix, thin film transistors arranged at intersections of the data signal lines 4 and the scanning lines, and pixel electrodes arranged via the thin film transistors A TFT glass substrate 8 having the above is prepared. Here, the data signal line 4 has the shape described above. Next, a CF glass substrate 5 on which a counter electrode is formed so as to face the upper surface of the TFT glass substrate 8 is disposed, and is bonded and sealed with a sealing material 6 or the like. Next, the CF glass substrate 5 is cut at the position above the input terminal (TFT glass substrate terminal portion 1) of the data signal line 4 and retracted from the TFT glass substrate 8, and the CF glass substrate end material 7 is removed. . Next, a liquid crystal material 9 is injected and sealed in the gap between the TFT glass substrate 8 and the CF glass substrate 5 to form a liquid crystal panel. Here, as shown in FIG. 1, when the CF glass substrate 5 is cut, it is cut so that the cut end portion 20 of the CF glass substrate 5 is located in a region corresponding to the upper portion of the thin shape of the data signal line 4.

  In this way, the data signal line 4 having a thin area is formed, and the thin area of the data signal line 4 is located in the area corresponding to the lower part of the cut end portion 20 of the CF glass substrate 5. The impact on 4 increases.

  As described above, according to the liquid crystal display device and the manufacturing method thereof in the present embodiment, the impact given to the data signal line 4 when the CF glass substrate 5 is cut increases, and film peeling easily occurs. Therefore, it becomes easy to become a disconnection within a manufacturing process hereafter by external stress by a cleaning apparatus etc. Therefore, it is possible to prevent later occurrence at the customer.

<Embodiment 2>
FIG. 2 is a plan view showing a configuration in the vicinity of a cut portion of the CF glass substrate on the signal input terminal side of the liquid crystal display device according to Embodiment 2 of the present invention. The liquid crystal panel according to the present embodiment is arranged at intersections of a plurality of data signal lines 4 and scanning lines (not shown) arranged in a matrix orthogonal to each other on the upper surface, and the data signal lines 4 and the scanning lines. A thin film transistor (not shown), a pixel electrode (not shown) arranged through the thin film transistor, an array substrate (TFT glass substrate 8) having a monitor wiring 10 arranged in parallel with the data signal line 4, and the TFT A CF glass substrate 5 (counter substrate) on which a counter electrode (not shown) facing the glass substrate 8 is formed, and an alignment film (not shown) between the TFT glass substrate 8 and the CF glass substrate 5. Held liquid crystal material 9. Here, in the monitor wiring 10 in the present embodiment, a region corresponding to the lower portion of the cut end portion 20 of the CF glass substrate 5 is formed to be thinner than other regions.

  Next, a method for manufacturing the liquid crystal display device in the present embodiment will be described. First, a plurality of data signal lines 4 and scanning lines arranged orthogonally on the upper surface in a matrix, thin film transistors arranged at intersections of the data signal lines 4 and the scanning lines, and pixel electrodes arranged via the thin film transistors A TFT glass substrate 8 having a monitor wiring 10 in which the data signal lines 4 are arranged in parallel is prepared. Here, the monitor wiring 10 has the shape described above. Next, a CF glass substrate 5 on which a counter electrode is formed is disposed so as to face the upper surface of the TFT glass substrate 8, and is bonded and sealed with a sealing material 6 or the like. Next, the CF glass substrate 5 is cut at a position above the input terminal (TFT glass substrate terminal portion 1) of the data signal line 4 and retracted from the TFT glass substrate 8. Next, a liquid crystal material 9 is injected and sealed in the gap between the TFT glass substrate 8 and the CF glass substrate 5 to form a liquid crystal panel. Here, as shown in FIG. 2, when the CF glass substrate 5 is cut, the CF glass substrate 5 is cut so that the cut end portion 20 of the CF glass substrate 5 is located in a region corresponding to the thin upper portion of the monitor wiring 10.

  In this way, the monitor wiring 10 having a thin area is formed in parallel with the data signal line 4, and the thin area of the monitor wiring 10 is located in the area corresponding to the lower part of the cut end portion 20 of the CF glass substrate 5. As a result, the impact applied to the monitor wiring 10 when the CF glass substrate 5 is cut increases, and only the monitor wiring 10 is liable to be peeled off.

  As described above, according to the liquid crystal display device and the manufacturing method thereof according to the present embodiment, by monitoring the monitor wiring 10, it is possible to detect early film floating and film peeling between process flows and to prevent a decrease in yield. .

<Embodiment 3>
FIG. 3 is a cross-sectional view showing the configuration in the vicinity of the cut portion of the CF glass substrate on the signal input terminal side of the liquid crystal display device according to Embodiment 3 of the present invention. The liquid crystal panel according to the present embodiment is arranged at intersections of a plurality of data signal lines 4 and scanning lines (not shown) arranged in a matrix orthogonal to each other on the upper surface, and the data signal lines 4 and the scanning lines. An array substrate (TFT glass substrate 8) having a thin film transistor (not shown), a pixel electrode (not shown) arranged via the thin film transistor, and a counter electrode (not shown) facing the TFT glass substrate 8 are provided. A formed CF glass substrate 5 (counter substrate), and a liquid crystal material 9 held between the TFT glass substrate 8 and the CF glass substrate 5 via an alignment film (not shown) are provided. Here, the data signal line 4 in the present embodiment has a two-layer structure 11 in a region corresponding to the lower portion of the cut end portion 20 of the CF glass substrate 5.

  Next, a method for manufacturing the liquid crystal display device in the present embodiment will be described. First, a plurality of data signal lines 4 and scanning lines that are arranged in a matrix and are orthogonal to each other on the upper surface, a thin film transistor that is arranged at the intersection of the data signal line 4 and the scanning line, and a pixel electrode that is arranged via the thin film transistor A TFT glass substrate 8 having the above is prepared. Here, the data signal line 4 has the shape described above. Next, a CF glass substrate 5 on which a counter electrode is formed so as to face the upper surface of the TFT glass substrate 8 is disposed, and is bonded and sealed with a sealing material 6 or the like. Next, the CF glass substrate 5 is cut at a position above the input terminal (TFT glass substrate terminal portion 1) of the data signal line 4 and retracted from the TFT glass substrate 8. Next, a liquid crystal material 9 is injected and sealed in the gap between the TFT glass substrate 8 and the CF glass substrate 5 to form a liquid crystal panel. Here, as shown in FIG. 3, when cutting the CF glass substrate 5, the cutting is performed so that the cut end 20 of the CF glass substrate 5 is located in a region corresponding to the upper portion of the two-layer structure 11 of the data signal line 4. To do.

  As described above, according to the liquid crystal display device and the manufacturing method thereof in the present embodiment, the data signal line 4 below the cut end portion 20 of the CF glass substrate 5 is formed in the two-layer structure 11 so that the film floats and peels off. It is possible to reduce the occurrence and prevent the yield from decreasing.

<Embodiment 4>
FIG. 4 is a cross-sectional view showing the configuration in the vicinity of the cut portion of the CF glass substrate on the signal input terminal side of the liquid crystal display device according to Embodiment 4 of the present invention. The liquid crystal panel according to the present embodiment is arranged at intersections of a plurality of data signal lines 4 and scanning lines (not shown) arranged in a matrix orthogonal to each other on the upper surface, and the data signal lines 4 and the scanning lines. A thin film transistor (not shown), a pixel electrode (not shown) arranged through the thin film transistor, an array substrate (TFT glass substrate 8) having a column of the organic film 12 arranged outside the display region, and the TFT A CF glass substrate 5 (counter substrate) on which a counter electrode facing the glass substrate 8 is formed; and a liquid crystal material 9 held between the TFT glass substrate 8 and the CF glass substrate 5 with an alignment film interposed therebetween. ing. Here, the organic film 12 in the present embodiment is partially disposed on the data signal line 4 outside the lower portion of the cut end portion 20 of the CF glass substrate 5.

  Next, a method for manufacturing the liquid crystal display device in the present embodiment will be described. First, a plurality of data signal lines 4 and scanning lines arranged orthogonally on the upper surface in a matrix, thin film transistors arranged at intersections of the data signal lines 4 and the scanning lines, and pixel electrodes arranged via the thin film transistors A TFT glass substrate 8 having an organic film 12 disposed outside the display area is prepared. Next, a CF glass substrate 5 on which a counter electrode is formed so as to face the upper surface of the TFT glass substrate 8 is disposed, and is bonded and sealed with a sealing material 6 or the like. Next, the CF glass substrate 5 is cut at a position above the input terminal (TFT glass substrate terminal 1) of the data signal line 4 and retracted from the TFT glass substrate 8. Next, a liquid crystal material 9 is injected and sealed in the gap between the TFT glass substrate 8 and the CF glass substrate 5 to form a liquid crystal panel. Here, as shown in FIG. 4, when the CF glass substrate 5 is cut, the CF glass substrate 5 is cut so that the cut end portion 20 of the CF glass substrate 5 is located inside the position where the organic film 12 is disposed.

  As described above, according to the liquid crystal display device and the manufacturing method thereof in the present embodiment, the column made of the organic film 12 is partially disposed on the data signal line 4 outside the lower portion of the CF glass substrate cut end 20. Since the CF glass substrate end material 7 is not directly in contact with the source signal line, the occurrence of film floating and film peeling can be reduced and the yield can be prevented from decreasing.

It is the top view and sectional drawing which showed the structure of CF glass substrate cutting part by the side of the signal input terminal of the liquid crystal display device in Embodiment 1 of this invention. It is the top view which showed the structure of CF glass substrate cutting | disconnection part by the side of the signal input terminal of the liquid crystal display device in Embodiment 2 of this invention. It is sectional drawing which showed the structure of the CF glass substrate cutting part vicinity of the signal input terminal side of the liquid crystal display device in Embodiment 3 of this invention. It is sectional drawing which showed the structure of CF glass substrate cutting | disconnection part by the side of the signal input terminal of the liquid crystal display device in Embodiment 4 of this invention.

Explanation of symbols

  1 TFT glass substrate terminal section, 2 black matrix, 3 panel display area, 4 data signal line, 5 CF glass substrate, 6 sealing material, 7 CF glass substrate edge material, 8 TFT glass substrate, 9 liquid crystal material, 10 monitor wiring , 11 Two-layer structure of data signal line, 12 Organic film, 20 Cut end.

Claims (8)

A first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
A second substrate disposed opposite to the upper surface of the first substrate via a liquid crystal and having a cut end at a position retracted from an end of the first substrate;
The data signal line is a liquid crystal display device in which a region corresponding to a lower portion of the cut end portion of the second substrate is formed thinner than other regions. A first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
A second substrate disposed opposite to the upper surface of the first substrate via a liquid crystal and having a cut end at a position retracted from an end of the first substrate;
The first substrate further includes a monitor wiring that is arranged in parallel with the data signal line, and a region corresponding to a lower portion of the cut end portion of the second substrate is formed narrower than other regions. Liquid crystal display device. A first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
A second substrate disposed opposite to the upper surface of the first substrate via a liquid crystal and having a cut end at a position retracted from an end of the first substrate;
The data signal line has a two-layer structure in a region corresponding to a lower portion of the cut end portion of the second substrate. A first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
A second substrate disposed opposite to the upper surface of the first substrate via a liquid crystal and having a cut end at a position retracted from an end of the first substrate;
The liquid crystal display device, wherein the first substrate further includes an organic film partially disposed on the data signal line outside the lower portion of the cut end portion of the second substrate. (A) preparing a first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
(B) disposing a second substrate so as to face the upper surface of the first substrate;
(C) cutting the second substrate at a position located above the input terminal of the data signal line and retracted from an end of the first substrate;
In the step (a), in the data signal line, a region corresponding to a lower portion of the cut end portion of the second substrate is formed to be narrower than other regions. (A) preparing a first substrate having a monitoring wiring arranged in parallel with the data signal lines in addition to the plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
(B) disposing a second substrate so as to face the upper surface of the first substrate;
(C) cutting the second substrate at a position located above the input terminal of the data signal line and retracted from an end of the first substrate;
In the step (a), the monitor wiring has a liquid crystal display device manufacturing method in which a region corresponding to a lower portion of the cut end portion of the second substrate is formed thinner than other regions. (A) preparing a first substrate having a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
(B) disposing a second substrate so as to face the upper surface of the first substrate;
(C) cutting the second substrate at a position located above the input terminal of the data signal line and retracted from an end of the first substrate;
In the step (a), the data signal line has a two-layer structure in a region corresponding to a lower portion of the cut end portion of the second substrate. (A) preparing a first substrate having an organic film in addition to a plurality of data signal lines and scanning lines arranged in a matrix on the upper surface;
(B) disposing a second substrate so as to face the upper surface of the first substrate;
(C) cutting the second substrate at a position located above the input terminal of the data signal line and retracted from an end of the first substrate;
In the step (a), the organic film is partially disposed on the data signal line outside the lower end of the cut end of the second substrate.

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