JPH0235417A - Production of liquid crystal display device - Google Patents

Abstract

PURPOSE:To suppress the static electricity generated in a substrate to a low level and to prevent electrode destruction, etc., by taking out the substrate after a rubbing treatment by means of a substrate attaching/detaching member constituted of an insulator. CONSTITUTION:The substrate 1 coated with an oriented film is subjected to the rubbing treatment by rotating a rotary drum 2 stuck with brush-shaped fibers on the outer periphery of the drum in a specified direction. The substrate 1 after this treatment is taken out of the rubbing device by using the substrate attaching/detaching member 3 constituted of the insulator such as 'Teflon(R)'. As a result, the static electricity generated in the substrate 1 is suppressed to the practicably low level and the generation of the electrode destruction, orientation defects, etc., by electric discharge is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a liquid crystal display device, and particularly to a rubbing treatment.

[Prior Art] A rubbing method is used as a method for aligning liquid crystal molecules in a certain direction on the surface of a liquid crystal cell substrate of a liquid crystal display device.

As a conventional rubbing method, a general method is to rotate a rotating drum in which brush-like fibers are arranged on the outer periphery in a certain direction, and bring the brush-like fibers into contact with the substrate for rubbing treatment. Generally, the substrate is attached and detached using a substrate attachment/detachment section of a rubbing device that uses a material that is not used.

[Problem to be Solved by the Invention''] I However, in the above-mentioned conventional technology, when the substrate attachment/detachment part of the rubbing device is a conductor, static electricity generated by friction between the rotating fibers and the substrate is transferred to the substrate attachment/detachment part of the substrate and the conductor. There is a problem in that discharge occurs between the electrodes, causing electrode breakage and poor alignment.

SUMMARY OF THE INVENTION Therefore, the present invention is intended to solve the above-mentioned problems, and its purpose is to provide a method for manufacturing a liquid crystal display device that does not cause electrode breakage or alignment defects during rubbing treatment of a substrate of a liquid crystal display device. It's there.

[Means for solving the problem] In the method for manufacturing a liquid crystal display device of the present invention, a pair of substrates that have been subjected to a rubbing process using a predetermined rubbing device are placed facing each other with a predetermined gap, and liquid crystal is applied between the nuclei and in the gap. The method of manufacturing a liquid crystal display device by filling the liquid crystal display device with the substrate may include a step of bringing the substrate into contact with a substrate attachment/detachment member of the rubbing device via an insulator.

[Example] Hereinafter, the present invention will be explained based on examples.

(Example 1) FIG. 1 (α) shows a schematic diagram of the present invention. In the figure, 1 is a substrate coated with an alignment film, 2 is a rotating drum with brush-like fibers pasted on the outer periphery of the drum, and 6 is a substrate attachment/detachment member of a rubbing device.

After the substrate 1 coated with the alignment film is rubbed with the rotating drum 2, it is removed from the rubbing device using the substrate removal member 6 made of an insulating material (Delrin).At this time, the static electricity is approximately 1
KV or less, and no electrode breakage or orientation failure occurred.

(Example 2) The material of the insulator used in Example 1 was changed to Teflon. Results similar to those in Example 1 were obtained.

(Example 3) FIG. 1<b> shows a schematic diagram of this example. In the figure, 1 is a substrate coated with an alignment film, 2 is a rotating drum with brush-like fibers pasted on the outer periphery of the drum, 5 is a substrate attachment/detachment member of a rubbing device, and 4 is a part that comes into contact with the substrate.

After the substrate 1 coated with the alignment film is rubbed with a rotating drum 2, an insulator (Delrin) 4 is applied to the part that contacts the substrate 1.
The board was removed from the rubbing device using the SUS board attachment/detachment member 6 to which the board was attached. The static electricity at this time was about 1 KV or less, and the same results as in Example 1 were obtained.

[Comparative Example] The substrate attachment/detachment member 6 shown in FIG. 1(-) was made of SUS. When the static electricity was measured using the same process as in Example 1, it was approximately 10
Static electricity of ~20KV was generated, causing electrode breakage and poor alignment.

[Effects of the Invention] As described above, according to the present invention, by using an insulator for the substrate attachment/detachment part of the rubbing device, after the rubbing process,
The static electricity generated when removing the board from the rubbing device can be suppressed to a practical low level, preventing electrode breakage and
A uniformly oriented surface with no orientation defects can be obtained.

As described above, the present invention is extremely useful as a method for manufacturing a liquid crystal display device.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. 1......Substrate 2...Rotating drum 3...Board attachment/detachment member 4 of the rubbing device
・・・・・・・・・Board contact part and above Applicant: Seiko Epson Corporation

Claims (1)

[Claims] A method for manufacturing a liquid crystal display device, in which a pair of substrates that have been subjected to a rubbing process using a predetermined rubbing device are disposed facing each other with a predetermined gap, and the gap is filled with liquid crystal, wherein the substrate is attached to a substrate detachable member of the rubbing device. 1. A method of manufacturing a liquid crystal display device, comprising a step of contacting with an insulator through an insulator.