JPS6214347A - Method and apparatus for producing optical disk - Google Patents

Abstract

PURPOSE:To improve reliability and mass productivity by providing a printer, a tray of be installed with a substrate or disk and a conveyor for conveying the tray and successively forming a reflection film or recording film as well as a protective film and label printing film on the disk by continuous stages. CONSTITUTION:The substrate 2 installed on the tray 21 is taken into a vacuum through a preliminary vacuum chamber 23 and the Al reflection film is formed on the substrate in a sputter chamber 24. The substrate is returned to the atm. through a preliminary vacuum chamber 25. The protective film is provided on the disk formed thereon with the reflection film by a protective film coater 26 through a conveyor 22 and is cured by a curing device 27. The printing film is provided by a screen printer 28 through a conveyor 22 on the disk on which the protective film is formed. Said film is cured by a curing device 29. The films are continuosly treated within the same device. The disk having the high reliability is thus obtd. at a low cost with high mass productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing an optical disc capable of recording, reproducing, or erasing digital signals such as a video disc, a digital audio disc (for example, a compact disc), a still image, a document file, and an optical disc. The present invention relates to manufacturing equipment.

Conventional Technology In general, optical discs are considered promising as information media because of their extremely high information density, high SZN ratio, and low noise, and have been commercialized as video discs and digital audio discs.
In recent years, research and development has also been conducted on optical discs that record and reproduce z-signals.

Figure 6 shows the conventional general digital audio '/(
1′t′6;b :y 7 /< p”f (21(D
**f:yr:"° (This is a PCM-converted digital signal that is recorded in a pit array on a resin substrate and reproduced by a semiconductor laser.

In FIG. 6, 1 is a disk, 2 is a resin substrate, 3 is a digital signal section in the form of a pit row carved on the resin substrate 2, and 4
5 is a reflective film formed on the surface thereof, 5 is a protective film coated on the reflective film 4, 6 is a label printing film provided on the protective film 6, and 7 is a semiconductor laser beam for reproduction.

The reflective film 4 is necessary for reproducing digital signals, the protective film 5 is necessary for protecting the reflective film, and the label printing film 6 is necessary for identifying the disc.

Conventionally, only separate reflective film forming apparatuses, protective film forming apparatuses, and printing apparatuses were used to form reflective films, protective films, and printed films. FIG. 2 shows a sectional view of a conventional thin film forming apparatus for forming a reflective or recording film on a substrate. Reference numeral 8 denotes a thin film forming apparatus, in which a substrate 2 is placed in a vacuum container, and a vapor deposition source 9 is heated by a heater 10 to perform vacuum vapor deposition to form a reflective film or a recording film on the substrate.

Next, FIG. 3 shows a sectional view of a conventional protective film forming apparatus for forming a protective film on a disk on which a reflective film or a recording film has been formed. Protective film forming device (611) has a protective film adhering device 12 and a drying device 13.

Next, FIG. 4 shows a sectional view 4 of a conventional printing apparatus for printing a label on a disk (1) on which a protective film is formed. The printing device 14 includes a screen printing device 15 and a drying device 16.

Problems to be Solved by the Invention However, in the above configuration, a thin film forming apparatus for forming a reflective film or a recording film on the substrate, and a protective film on the disk on which the reflective film or recording film is formed are required. Since the protective film forming device that forms the protective film and the printing device that prints the label on the protective film are separate configurations, unnecessary labor and time are spent on each process, contamination and defects are likely to occur, and reliability is reduced. It had problems such as lack of t1 and lack of mass productivity.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an optical disc manufacturing method and a manufacturing apparatus thereof, which can provide highly reliable optical discs with good mass productivity and at low cost.

5 Means for Solving the Problems/゛In order to solve the above problems, the present invention provides a thin film forming apparatus for forming a reflective film or a recording film on a substrate in the same apparatus;
A protective film forming device that forms a protective film on the disc on which the reflective film or recording film is formed, a printing device that prints a label on the disc on which the protective film is formed, and a disc on the substrate. The apparatus is equipped with a tray for transporting the tray, and a transport device for transporting the tray, and forms a reflective film or a recording film, a protective film, and a label printing film on the disc in a continuous process.

According to the above-described configuration, the present invention forms a reflective film or a recording film on a substrate placed on a tray using a thin film forming device, and then transports the tray using a transport device in consecutive steps within the same device. After forming a protective film on the disk provided with the reflective film or recording film using a protective film forming apparatus,
The label is printed on the disc with the above-mentioned protective film using a printing device in a continuous process within the same device, and since it is a continuous process, reliability can be improved.

Since mass productivity is also improved, optical discs can be manufactured at low cost.

EXAMPLE Hereinafter, a method and apparatus for manufacturing an optical disk according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an apparatus 1A for providing the method of manufacturing an optical disk of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional view. Thin film forming device 18 that forms a reflective film on a substrate
, a protective film forming device 19 that forms a protective film on a disc on which a reflective film has been formed, a printing device 2o that performs label printing on the disc on which a protective film is provided, and a tray 21 on which the substrate or disc is placed. and a conveyance device 22 that conveys the tray.

The substrate 2 is placed on a tray 21, taken into a vacuum through a pre-vacuum chamber 23, an aluminum (Al) reflective film is formed by sputtering in a sputter chamber 24, and then returned to the atmosphere through a pre-vacuum chamber 26. . Next, the disk on which the reflective film has been formed is transported through a protective coating device 22, where a protective film is applied in a protective coating device 26, and the protective film is cured in a curing device 27. Next, the disk on which the protective film has been formed is passed through the conveying device 22 to the screen printing device 28 (a printing device IIψ is provided), and then to the curing device 29.
(The printed film is cured).

These are sequentially processed in the same apparatus, including a step of forming a reflective film or a recording film on the substrate, and a step of forming a protective film on the disk provided with the reflective film trench or recording film.
- Reliability and mass productivity are improved because the step of label printing on the disc provided with the protective film is a continuous process.

Aluminum (Ae) is generally used as the reflective film, and acrylic ultraviolet curing resin is used as the protective film and the label printing film.

The optical disc device of the present invention is also effective even for optical discs provided with a recording film instead of a reflective film.

Effects of the Invention As described above, the present invention provides a thin film forming device that forms a reflective film or a protective film on a substrate in the same device, and a thin film forming device that forms a protective film on a disk provided with the reflective film or recording film. It is equipped with a protective film forming device, a printing device that prints a label on the disc provided with the protective film, a tray on which the disc is placed, and a conveying device that transports the tray described in -. A reflective film or a recording film, a protective film, and a printing film can be formed on top of the film.Highly reliable discs are manufactured without contamination or impurities such as dirt or dust, and because it is a continuous process. Since mass production is high and equipment costs are low, optical discs can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 shows an optical disk manufacturing apparatus according to an embodiment of the present invention, FIG. 1(a) is a plan view, FIG. 1(b) is a sectional view of the same, and FIG. 2 is a conventional optical disk manufacturing apparatus. A sectional view of a certain thin film forming apparatus, FIG. 3 is a sectional view of the same protective film forming apparatus, FIG. 4 is a sectional view of the same printed film forming apparatus, and FIG. 6(a)
, (b), and (c) are a plan view, a cross-sectional view, and an enlarged view of essential parts of a digital audio disc, which is a type of optical disc. 1...Disc, 2...Resin substrate, 4...
・Reflective film, 5...Protective film, 6...Printed film, 1
7... Optical disk manufacturing device, 18 Thin film forming device, 19... Protective film forming device, 20... Printing device, 21... Tray, 22... ...Transportation device. Name of agent: Patent attorney Toshio Nakao and one other person No. 5 Figure 2 Figure 3 j! @Figure 4

Claims (2)

[Claims] (1) After forming a reflective film or a recording film on a substrate placed on a tray using a thin film forming device, the tray is sequentially transported by a transport device in consecutive steps within the same device;
A method for producing an optical disc, comprising forming a protective film on a disc provided with the reflective film or recording film using a protective film forming device, and then forming a label printing film on the disc provided with the protective film using a printing device. . (2) In the same device, a thin film forming device that forms a reflective film or a recording film on a substrate, a protective film forming device that forms a protective film on a disk provided with the reflective film or recording film, and Equipped with a printing device that prints a label on a disc provided with a film, a tray on which the disc is placed, and a transport device that transports the tray, the reflective film or recording film is sequentially applied to the substrate in a continuous process. An optical disc manufacturing apparatus configured to form a film and a printed film.