JP4133475B2 - Manufacturing method of liquid crystal display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a liquid crystal display panel.
[0002]
[Prior art]
In the liquid crystal display device, a plurality of image display region driving electrodes are formed on one of two mother substrates, and a common electrode corresponding to the image display region is formed on the other mother substrate. There is a manufacturing method in which a seal member is provided, both mother substrates are aligned and pasted, and then divided into individual image display areas. Individually divided ones are referred to as a liquid crystal display panel, and liquid crystal is injected from a liquid crystal injection port formed in a part of the sealing member, and the liquid crystal injection port is sealed to complete the liquid crystal display panel.
[0003]
There are various combinations of two mother substrates, but a glass substrate and a glass substrate, a silicon substrate and a glass substrate, a plastic substrate and a plastic substrate, etc. are used. The present invention is a liquid crystal display panel using a combination of a silicon substrate and a glass substrate. It is related with the manufacturing method.
[0004]
A plurality of image display regions are formed on the mother silicon substrate, and a common electrode is formed on the mother glass substrate in a region corresponding to the image display region formed on the mother silicon substrate. A liquid crystal injection port is formed in the outer periphery of each image display area of the mother silicon substrate or the mother glass substrate, and a seal member is provided, and the mother silicon substrate and the mother glass substrate are attached. After that, it is divided into individual liquid crystal display panels as described above.
[0005]
Since a silicon substrate is difficult to be divided by scribe, a dicing method is used. The glass substrate can be divided by scribing, and an inexpensive scribing method has been adopted. First, the mother silicon substrate is diced to break, and then the mother glass substrate is scribed to break. A manufacturing method of a liquid crystal display device is disclosed in which a silicon substrate and a glass substrate are bonded together, the glass substrate is diced, then the silicon substrate is diced, and after cleaning and drying, the liquid crystal display device is divided into individual liquid crystal display panels. (For example, Patent Document 1)
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-248477 (page 4-5, FIG. 3)
[0007]
[Problems to be solved by the invention]
When the glass substrate is divided by the scribing method, chipping from the edge portion of the scribed glass occurs, which damages the glass surface or becomes an unstable element of material handling in the subsequent process. Further, since an impact is applied when the liquid crystal display panels are divided, the elements formed on the silicon substrate may be damaged. Even when the glass substrate is divided by the dicing method, the disc-shaped grindstone is rotated to form the dividing line, so the shape of the cutting part becomes U-shaped, and the same problem as scribe occurs because an impact is also applied when dividing. Was.
[0008]
An object of the present invention is to prevent chipping that occurs when a mother glass substrate or a mother silicon substrate is divided, to prevent damage to the glass due to chipping, and to stabilize material handling in the subsequent process. At the same time, the object is to prevent damage to the elements formed on the silicon substrate.
[0009]
[Means for Solving the Problems]
At least a mother silicon substrate having a plurality of image display areas formed thereon and a mother glass substrate corresponding to the mother silicon substrate provided with a seal member for each image display area, and a mother silicon substrate for each image display area In the method of manufacturing a liquid crystal display panel having a step of dividing the mother glass substrate, the mother glass substrate is diced into a V-groove shape, and then the bottom of the V-groove is scribed to divide the liquid crystal display panel.
[0010]
At least a mother silicon substrate having a plurality of image display areas formed thereon and a mother glass substrate corresponding to the mother silicon substrate provided with a seal member for each image display area, and a mother silicon substrate for each image display area Manufacturing method of liquid crystal display panel, wherein the mother glass substrate and the mother silicon substrate are diced into V-grooves, and further scribed and divided at the bottom of the V-groove. And
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a top view in which a seal member is applied to the outer periphery of the image display area of the mother silicon substrate, and FIG. 2 is a side view in which the mother silicon substrate and the mother glass substrate are attached. A seal member 4 is applied by screen printing or the like, leaving a liquid crystal injection port 3 on the outer periphery of the image display region 2 formed in plural on the mother silicon substrate 1, and a mother glass substrate 5 is pasted to cure the seal member.
[0012]
FIG. 3 is a view for explaining the present invention, and is a cross-sectional view obtained by V-shaped dicing on a mother glass substrate. Conventionally, dicing has used a disc-shaped thin grindstone to form a dicing line (the cross-sectional shape is U), but in the present invention, the dicing line has a V-shaped cross-sectional shape. For example, a dicing line 6 having a groove depth of 70 μm is formed so that the opening angle of V is 90 degrees with respect to a glass substrate having a thickness of 700 μm.
[0013]
FIG. 4 is a view for explaining the present invention, and is a sectional view in which a V-shaped groove bottom is scribed. The scribing blade edge 7 is aligned with the bottom of the V-shaped groove of the dicing line 6 (at this time, it goes without saying that the cutting edge angle of the scribing is smaller than the opening angle of the V groove). The remaining portion of the mother glass substrate 5 is divided by the line 8 by the scribe pressure. Whether to divide from the mother glass substrate 5 or from the mother silicon substrate 1 is merely a choice, but in the state of FIG. 4, the mother silicon substrate 1 is diced according to the prior art and is not yet divided. Therefore, even if the mother glass substrate 5 is divided, it does not fall apart. However, the mother silicon substrate 1 must be diced before the mother glass substrate 5 is scribed. When the mother silicon substrate 1 is divided first, the mother glass substrate 5 may be diced before that. This is because the cooling liquid is used in dicing, and if divided, the cooling liquid enters the liquid crystal display panel from the liquid crystal inlet.
[0014]
FIG. 5 is a cross-sectional view of a liquid crystal display panel completed by dividing. The corners of the glass substrate 5 are chamfered by dicing, and the occurrence of chipping can be prevented.
[0015]
FIG. 6 is a sectional view of a liquid crystal display panel completed by the manufacturing method according to the second aspect of the present invention. Both the glass substrate 5 and the silicon substrate 1 are diced into V-grooves, so that there is a chamfering effect, and each V-groove bottom is scribed and divided to eliminate the need for impact during division, so that the silicon substrate 1 is formed. There is no destruction of the device.
[0016]
【The invention's effect】
According to the present invention, since the diced surface becomes a chamfered surface, chipping generated at the corners is prevented, and the generation of glass scratches can be prevented. Therefore, material handling in the later process can be done easily.
[0017]
According to the present invention, an impact for dividing is not necessary, damage to elements formed on a silicon substrate can be prevented, a manufacturing yield can be increased, and a liquid crystal display panel can be provided at low cost.
[Brief description of the drawings]
FIG. 1 is a top view in which a seal member is applied to the outer periphery of an image display area of a mother silicon substrate. FIG. 2 is a side view in which a mother silicon substrate and a mother glass substrate are attached. Sectional view with V-shaped dicing on the mother glass substrate. FIG. 4 is a diagram for explaining the present invention, and is a sectional view in which the bottom of the V-shaped groove is scribed. FIG. FIG. 6 is a cross-sectional view of a liquid crystal display panel completed by the manufacturing method according to claim 2.
1 Mother Silicon Substrate 2 Image Display Area 3 Liquid Crystal Injection Port 4 Seal Member 5 Mother Glass Substrate 6 V-Groove 7 Scribe Blade 8 Split Line

Claims (2)

At least a mother silicon substrate having a plurality of image display areas formed thereon and a mother glass substrate corresponding to the mother silicon substrate provided with a seal member for each image display area, and a mother silicon substrate for each image display area And a step of dividing the mother glass substrate, wherein the mother glass substrate is diced into a V-groove shape, and then the bottom of the V-groove is scribed to divide the liquid crystal display panel. Method. At least a mother silicon substrate having a plurality of image display areas formed thereon and a mother glass substrate corresponding to the mother silicon substrate provided with a seal member for each image display area, and a mother silicon substrate for each image display area And a mother glass substrate, wherein the mother glass substrate and the mother silicon substrate are diced into V-grooves and further scribed and divided at the bottom of the V-groove. Manufacturing method of display panel.

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