JPS6376130A - Production of optical disk - Google Patents

Abstract

PURPOSE:To simplify the construction of a device and to permit exact handling and fixing by mounting a disk hub consisting of a magnetic material to be used for fixing a completed optical disk to an optical disk recording and reproducing device to a substrate for the optical disk in the bare state prior to the formation of a recording film, reflection film, etc., thereon. CONSTITUTION:The disk hub 102 consisting of the magnetic material to be used for fixing the completed optical disk to the optical disk recording and reproducing device is mounted to the substrate 101 for the optical disk in the bare state prior to the formation of the recording film, reflection film, etc., thereon. The need for the intricate construction for the front end of a robot arm which holds said disk in the subsequent stage is thereby eliminated and only the magnetic fixing by an electromagnet and the simple positioning jig are necessitated; therefore, the device is extremely simplified. Mounting of the disk not only to the robot arm but also to a vacuum device for film formation is executed not by screws, etc., but by the magnet. The time required for mounting is thus shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing an optical disc in which information is recorded, erased, and reproduced using light.

[Conventional technology]

The production of optical discs is somewhat different for read-only optical discs and recordable or erasable optical discs, but is carried out through roughly similar processes.

The first step is the mold (stamper)! In the R manufacturing process, 7-photoresist is uniformly applied to the glass plate, and exposed along the information or guide track using a laser cutting machine to make it detailed. A stamper is made by electroforming nickel or the like on top of it. The second step is the process of manufacturing the plastic substrate of the optical disk, which is generally manufactured by injection molding using the stamper as a mold. Alternatively,
There is a step in which a stamper mold is printed onto a flat disk using a photocurable resin. In the case of read-only optical discs, the third stage is a step in which a reflective film, such as aluminum, is formed by vacuum evaporation or sputtering, and in the case of recording discs, films such as protective films and recording films are formed by vacuum evaporation. This is a process in which the film is formed using a method such as , sputtering, or spin code.

The fourth step is the final product process, in which the materials are bonded together to form an optical disk for quantitative use. Alternatively, the process involves gluing a disk hub to the center of the disk, or fitting the disk into a cartridge.

[Problem that the invention seeks to solve]

In the optical disc manufacturing process, a large number of optical disc substrates are produced from a stamper. After the building stage.

Loading and unloading from transport containers, and loading and unloading onto manufacturing and inspection equipment must be done unmanned. This is because the information on optical discs is processed in extremely small areas, and dust and scratches are extremely difficult to handle. This is to reduce manufacturing costs. Therefore, at each stage of the process, there is a need for an attachment/detachment jig, a transfer jig A, and a handling robot that do not generate large amounts of dust.

Establishing the manufacturing process was difficult.

It is an object of the present invention to improve the shortcomings of the conventional optical disc manufacturing method and to provide a method for manufacturing an optical disc that is less likely to cause dirt, dust, or defects by using a simple robot and a transport system with an attachment/detachment system.

Means for Solving Problem c] The method for manufacturing an optical disc of the present invention is an optical disc manufacturing method. In the manufacturing process of optical discs, the completed optical disc is transferred to an optical disc recording and reproducing apparatus with only the substrate before forming a recording film, a reflective film, etc. on the substrate of the optical disc. It is characterized by attaching a disk hub made of magnetic material used for fixing.

[Implementation row]

FIG. 1 is a sectional view showing a state in which a disk hub is attached to an optical disk substrate by the optical disk fA manufacturing method according to the present invention, and 101 is the substrate of the optical disk.

102 is a disc disk. Thereafter, a recording film and the like are formed on the optical disk substrate, and the two substrates are bonded together to form a finished product as shown in FIG. FIG. 2 (IOL) is a cross-sectional view of a write-once optical disc having an air sandwich structure, and FIG. 2 (6) is a diagram showing a case where two discs are closely bonded together.

Figure 3 shows a row of optical discs fixed to an optical disc recording/reproducing device.
Fixed magnetically.

A disk hub with the above-mentioned end use must naturally be made of magnetic material, and when bonded to an optical disk substrate, it must be installed so that the center hole of the disk hub is not eccentric to the information bits and guide tracks. One thing that needs to be done to implement the present invention is to adhere a magnetic disc tube to a substrate with eccentricity t.

By gluing a magnetic disc piece to the optical disc substrate, the tip of the robot arm that holds this disc in the subsequent process does not require a complicated structure.
It is extremely simple because it only requires magnetic fixation using a T-magnet as shown in FIG. 5 and a simple positioning jig.

Furthermore, since the robot arm and the vacuum equipment for film formation were fixed using magnets rather than screws, the time required for mounting was greatly reduced.

In addition, in the conventional manufacturing process, the transport container for optical discs is
It was necessary to devise a method to prevent discs from coming into contact with each other and damaging each other, but according to the optical disc manufacturing method according to the present invention, discs can be simply stacked on top of each other as shown in Figure 4. becomes possible.

As mentioned above, in each process of optical disk manufacturing, the disk hub is fixed by magnetic force during all of the non-dragging of the disks, so there is no need to grip the disks, so debris is generated due to friction, etc. Not surprisingly, the pit error rate of the final optical disc could also be reduced.

Conventionally, optical disc inspection equipment used a mechanical fixing method or vacuum fixing method before attaching the disc hub in the final process, but now it is similar to the recording and reproducing equipment shown in Figure 3. Now you can fix it quickly.

〔Effect of the invention〕

As shown in the embodiments above, according to the optical disk manufacturing method according to the present invention, the structure can be simplified in all aspects, including the optical disk transport container robot, each manufacturing device, and the attachment to the inspection device. Easy and accurate linking and accurate fixing can be achieved at the same time. Furthermore, with the simplification of FII manufacturing, it is also possible to reduce dust and defects, which are the most problematic in the manufacture of optical discs.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an optical disc substrate and a disc hub bonded together according to the optical disc manufacturing method of the present invention. FIG. 2(cL) (b) is a cross-sectional view of the final product of the optical disc, (a) is a cross-sectional view of the air sandwich ma, and (b) is a cross-sectional view of the closely bonded type. FIG. 3 is a sectional view showing a fixing member 1 for fixing an optical disc to an optical disc recording/reproducing device. FIG. 4 is a cross-sectional view showing a state in which optical disks are directly stacked by the optical disk manufacturing method according to the present invention. FIG. 5 is a sectional view showing one row of tips of a handling robot arm simplified by the optical disk tQia method according to the present invention. 102... Textbook\fu'. 2o2=-Tesishuhuf “ 203... Subeq 2o4... Cover ball' 3oB... IJ゛

Claims (1)

[Claims] In the manufacturing process of optical discs that use light to reproduce, record, or erase information, an optical disc recording/reproducing device is used to process a completed optical disc with only the substrate before forming a recording film, a reflective film, etc. on the substrate of the optical disc. A method for manufacturing an optical disk, comprising: attaching a disk hub made of a magnetic material to be used for fixing the disk to the disk.