JPH0658470B2 - Liquid crystal display panel manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a liquid crystal display panel in which upper and lower substrate glasses are thermocompression bonded using a slip sheet.

[Conventional technology]

Conventionally, in a method of manufacturing a liquid crystal display panel, a plurality of upper substrate glasses smaller than a lower substrate glass are placed on one lower substrate glass via a thermosetting adhesive to form a pair of upper and lower substrates. A pair of upper and lower substrate glass is formed into a pair of glasses, and a continuous sheet of paper having substantially the same size as the lower substrate glass and having no cutout portion is arranged as a slip sheet between each pair of upper and lower substrate glasses, and a crimping jig is provided. After that, the liquid crystal display panel was formed by placing it in a constant temperature layer and performing thermocompression bonding.

FIG. 2 in the drawing shows a plan view of a conventional interleaf paper. The dotted line portion of 7 is the position where the upper surface of the upper substrate glass and the interleaf sheet are in contact.

When the interleaf paper is heated in the constant temperature layer together with the upper and lower substrate glasses, it is dried as the heating time elapses, and the entire paper is contracted in the direction of the arrow in FIG. With such a change in the state of the interleaf sheet, if the upper substrate glass that is in contact with the lower portion of the interleaf sheet is not yet completely fixed to the lower substrate glass, the upper substrate glass will follow the contraction direction of the interleaf sheet. It gradually moves. As a result, the upper substrate glass and the lower substrate glass are pressed against each other while deviating from the positions where they should originally overlap with each other, frequently causing a problem of reduction in yield due to misalignment. Therefore, it is not preferable to use the above-mentioned interleaving paper in the manufacturing process of the liquid crystal display panel, which requires highly accurate mutual positional relationship between the upper and lower substrate glasses.

[Problems to be solved by the invention]

Therefore, the present invention solves such a problem, and its object is to make it possible to press-fit the positions of the upper and lower substrate glasses with high accuracy by devising the mold of the interleaf sheet as described above, and An object of the present invention is to provide a method for manufacturing a liquid crystal display panel with good work efficiency.

[Means for solving problems]

The method for manufacturing a liquid crystal display panel of the present invention is to mount a plurality of upper substrate glasses smaller than the lower substrate glass via a thermosetting adhesive on one lower substrate glass so as to form a plurality of liquid crystal display panels. After forming a pair of the upper and lower substrate glass pairs placed, the upper and lower substrate glass pairs are placed in a stack by interposing a slip sheet, and the upper substrate glass and the lower substrate glass are thermocompression-bonded. The interleaf paper includes a plurality of contact portions placed on each of the plurality of upper substrate glasses, an outer frame surrounding the plurality of contact portions at positions separated in the plane direction of the upper substrate glass, and a plurality of upper substrate glass members. It is characterized in that it is provided with a cutout portion provided along substantially the entire circumference of each and a thin tie bar connecting each of the plurality of contact portions to the outer frame.

〔Example〕

FIG. 1 is a perspective view showing a positional relationship when a slip sheet having a cutout according to the present invention and a liquid crystal display panel composed of a pair of upper and lower substrate glasses are overlapped with each other. In this embodiment, 1
For each lower substrate glass, four upper substrate glasses are installed on the upper surface to form one upper and lower substrate glass pair, and further, a plurality of upper and lower substrate glass pairs are superposed using a slip sheet as shown below. A method of manufacturing a liquid crystal display panel by pressure bonding is shown below. 1 is a slip sheet, and 1 is a plurality of contact portions that are placed in contact with a plurality of upper substrate glasses. Reference numeral 2 denotes a cutout portion provided along substantially the entire circumference of each of the plurality of upper substrate glasses.
An outer frame 3 surrounds the plurality of contact portions 1. Reference numeral 4 denotes a diver provided for connecting the plurality of contact portions 1 and the outer frame 3 so as not to separate them. The drawing shown in the lower part of FIG. 1 is a pair of upper and lower substrate glasses constituting a liquid crystal display panel, 5 is an upper substrate glass, and 6 is a lower substrate glass.

According to the interleaf sheet provided with the cutout portion 2 as described above, the contraction force caused by the drying of the interleaf sheet works within the range on each upper substrate glass as shown by the arrow in the figure, and the adjacent upper substrate glasses are adjacent to each other. It does not propagate in conjunction with each other. At this time, since the tie bar is made too thick and is affected by the shrinkage force of the entire outer frame 3, it is desirable to make the tie bar as thin as possible so that the tie bar is cut and opened when an excessive shrinkage force is applied.

〔The invention's effect〕

As described above, in the method for manufacturing a liquid crystal display panel of the present invention, by using a slip sheet provided with the above-mentioned cutout portion in one conventional continuous slip sheet, it is caused by the drying of the slip sheet. Since the contraction force does not propagate in association with the individual upper substrate glasses, the same effect can be obtained as if a plurality of independent interleaf sheets corresponding to the individual upper substrate glasses are set. Therefore, it becomes possible to prevent the problem of misalignment between the upper and lower substrate glasses, which has been caused by using a conventional continuous slip sheet having no cutout portion in the thermocompression bonding process.

Further, compared to the method of setting a plurality of independent interleaf sheets corresponding to each upper substrate glass, the mold interleaf sheet of the present invention has a plurality of upper substrate contact portions connected to the outer frame by tie bars. Since it can be handled as one continuous sheet, the number of operations for setting the slip sheet is one for each pair of upper and lower substrate glass. In other words, it is also excellent in work efficiency,
The upper substrate glass and the lower substrate glass can be thermocompression bonded easily with high accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a positional relationship in the case where a slip sheet having a cutout portion according to the present invention and a liquid crystal display panel composed of a pair of upper and lower substrate glasses are overlapped with each other. FIG. 2 is a plan view of a conventional slip sheet. 1 ... Upper substrate glass contact part (interleaving sheet) 2 ... Cutout part (interleaving sheet) 3 ... Outer frame (interleaving sheet) 4 ... Tie bar (interleaving sheet) 5 ... Upper substrate glass (liquid crystal display panel) 6 ... Lower substrate glass (liquid display panel) 7 ... Upper substrate glass contact position (interleaving paper)

Claims (1)

[Claims] 1. A set of a plurality of upper substrate glasses smaller than the lower substrate glass are placed on a lower substrate glass via a thermosetting adhesive so as to form a plurality of liquid crystal display panels. A method for manufacturing a liquid crystal display panel, comprising forming a pair of upper and lower substrate glasses, arranging a plurality of the pair of upper and lower substrate glasses in a stacked manner with a interleaving paper therebetween, and thermocompressing the upper substrate glass and the lower substrate glass. The interleaving paper is a plurality of contact portions that are placed on each of the plurality of upper substrate glasses, and an outer frame that surrounds the plurality of contact portions at positions separated in the plane direction of the upper substrate glass, A liquid crystal display, comprising: a cutout portion provided along substantially the entire circumference of each of the plurality of upper substrate glasses; and a thin tie bar connecting each of the plurality of contact portions to the outer frame. Panel manufacturing method.