JPS63121144A - Optical recording medium - Google Patents

Abstract

PURPOSE:To realize high recording density, by coating the both planes of an optical recording member of card shape with a laminate film, and sealing the neighborhood of the laminate film. CONSTITUTION:The both plane of the optical recording member 1 of card shape are coated with the laminate film 2 having an area larger than that of the optical recording member 1, and the neighborhood 3 of the laminate film 2 is sealed by adhering with thermal pressure, etc., thereby, the optical recording member 1 is protected. At the time of reading or rewriting, the laminate film 2 that is a protecting film is peeled once, and reading or rewriting is performed, and after that, the optical recording member 1 is coated with a new laminate film 2, then, it is sent from an equipment. The optical recording member is always coated with the laminate film 2 except when the reading or the writing is performed. In such way, it is possible to prevent a recording lane from being impaired by dust from the outside, and to perform recording with high density.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical recording medium, and particularly to a card-shaped optical recording medium whose surface is protected with a laminate film.

[Prior Art] Conventionally, in optical cards, an optical recording layer is formed on a card substrate using a heat-melting medium mixed with a substance having a high light emissivity such as silver, and a laser is applied to the optical recording layer. Information was recorded by forming pits by irradiating light or the like.

Furthermore, reading of recorded information has been performed using, for example, COD.

However, in these conventional examples, an area of several tens of squares x several tens of squares is used per one bit. Also,
In optical recording such as CDs, the area per bit should generally be several times the number of times, but the recording surface density is approximately 1 /
The reason why recording is performed using such a large area even though it is 10G is because reading errors occur due to dust, scratches, etc. adhering to the recording surface.

On the other hand, when it comes to optical cards, it is unavoidable that they must be handled roughly due to the usage conditions, and therefore, conventional optical cards have the drawbacks of lower recording density and lower recording capacity. Ta.

[Problems to be Solved by the Invention] The present invention eliminates the above-mentioned drawbacks of the conventional example, and even in optical cards that are unavoidably handled roughly, optical recording It is an object of the present invention to provide a card-shaped optical recording medium that can be used to realize a high recording Qv and degree equivalent to that of a medium.

[Means for Solving the Problems] The present invention provides an optical recording medium characterized in that both sides of a card-shaped optical recording member are coated with a laminate film, and the periphery of the laminate film is sealed. be.

Hereinafter, five aspects of the present invention will be explained in detail based on the drawings.

FIG. 1 is a perspective view showing an example of the optical recording medium of the present invention. In FIG. 0, 1 is a card-shaped optical recording member for recording and reproducing, and 2 is a laminate film that protects the optical recording member.

In FIG. 1, the optical recording medium of the present invention covers both sides of a card-shaped optical recording member l with a laminate film 2 having a larger area than the optical recording member l, and the laminate! ! The periphery 3 of the optical recording member 2 is sealed by thermocompression bonding or the like to protect the optical recording member 1.

Specific examples of the laminate film used in the present invention include a laminate film in which PET, modified acrylic, thermoplastic polyester, ethylene vinyl acetate copolymer, or the like is coated on a PET film.

After information is written on the optical recording medium of the present invention.

Since the recording surface is coated with a laminate film and sent out from the writing machine, any dust or fine scratches from the outside will adhere to the laminate film and the recording surface will be protected.

Next, when reading or rewriting, the protective laminate film is peeled off, reading or rewriting is performed, and the optical recording member is then coated with a new laminate film before being sent out from the device.

By adopting such a configuration, the optical recording medium of the present invention has the following features:
The optical recording member can be protected from scratches and dust from the outside, so
A recording capacity of 71 bits (1 x several μm), which is used in optical discs, becomes possible.

[Function] The optical recording medium of the present invention is formed by coating both sides of a card-shaped optical recording member with a laminate film and sealing the periphery of the laminate film, so that the recording surface of the optical recording medium is protected by the laminate film. The laminate film protects against scratches and dirt from the outside.
For recording and reproduction, the laminate film is peeled off to record and reproduce information on the optical recording member, and the recording surface can be protected by repeatedly attaching a new laminate film.

[Example] Next, the present invention will be described in more detail based on the example shown in the drawings.

2 and 3 are explanatory diagrams showing an example of a method for attaching the laminate film 2 to the card-shaped optical recording member l of the optical recording medium shown in FIG. 1.

First, as shown in Fig. 2, laminate l8 with roller 4.
After attaching i2 to both sides of the optical recording member 1, the periphery 3 is thermocompressed using a thermocompression bonder 5 as shown in FIG.

Next, FIGS. 4 and 5 are explanatory diagrams showing a method of peeling off the laminate film 2.

In FIG. 4, the periphery 3 of the laminate H2 is cut off using a press-type peripheral cutter 6, and then the laminate film 2 is removed using a claw member 7 as shown in FIG.

After the laminate H2 is peeled off from the optical recording member 1 in the manner described above, information may be recorded and reproduced, and the laminate film 2 may be applied again in the order shown in FIGS. 2 to 5.

Furthermore, in the optical recording medium of the present invention, as shown in FIG. 6, instead of laminating the entire card-shaped optical recording member 1, the optical recording section 8 may be intensively protected with a laminate H2.

[Effects of the Invention] As explained above, since the optical recording medium of the present invention is always covered with the laminate film 2 when not writing or reading, the recording surface is prevented from being exposed to external dust or scratches. This enables high-density optical recording.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the optical recording medium of the present invention, and FIG.
3 and 3 are explanatory diagrams showing a method for attaching a laminate film, FIGS. 4 and 5 are explanatory diagrams showing a method for peeling off a laminate film, and FIG. 6 is another example of an optical recording medium of the present invention. FIG.

Claims (1)

[Claims] Both sides of a card-shaped optical recording member are covered with a laminate film,
An optical recording medium characterized in that the periphery of the laminate film is sealed.