JPH0825350B2 - Optical record carrier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an optical record carrier, and more particularly to a card-shaped optical recording medium on which design printing is performed.

[Prior Art] Conventionally, as an optical card, for example, published patent publication Sho 58-
As disclosed in Japanese Patent No. 500437, an optical recording medium having a guide groove in advance was generally sandwiched between two substrates.

However, recently, a guide groove is embossed on a substrate by compression or the like, an optical recording medium is provided thereon by coating or vapor deposition, and a protective substrate (hereinafter referred to as a backing material) is laminated on the optical recording medium. There are many examples of configuration.

[Problems to be Solved by the Invention] In the optical card having such a configuration, the recording portion of the substrate,
That is, it is necessary to provide the optical recording medium in the portion where the guide groove is provided.

Further, in order to identify the user, purpose of use, classification, etc. of the optical card, a method of performing design printing on the optical card is used.

The optical recording medium is 830n in the near-infrared light region for recording / reproducing light.
Although those with sensitivity around m are used, many have absorption in the visible range as well, which impairs the design effect, and therefore must be carefully considered when designing cards for printing.

Further, the optical recording medium is required to have special optical characteristics such as absorption in near infrared light and reflectance, and the physical properties of substances constituting the optical recording medium are those obtained only by vapor deposition, Many dyes do not have sufficient solubility.

Therefore, many of the substances used in the optical recording medium are unsuitable as ink properties for coating, and therefore, using such an optical recording medium, multicolored and position-accurate design printing can be performed. It was impossible to do.

The present invention has been made in order to solve the problems of the prior art as described above, and uses an ink having excellent printability on the surface of the optical recording medium on the substrate to provide multicolor and high positional accuracy. It is an object of the present invention to provide an optical record carrier which is provided with design printing in advance and which has good design accuracy and is free from misalignment.

[Means for Solving the Problems] That is, the present invention is directed to a substrate having a region having a tracking groove on a surface thereof, an optical recording medium capable of recording / reproducing or reproducing by light, and an optical substrate having a protective substrate. A record carrier, wherein design printing is performed on a region other than a tracking groove forming region on the surface of the substrate, and the optical recording medium is formed by coating the region having the tracking groove on the substrate and the design printing. An optical recording medium carrier characterized by the above.

 The present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an example of the optical card of the present invention, and FIG.
The figure is an explanatory view showing a state in which the design printing is applied to the substrate.

1 and 2, the optical card of the present invention has a design print 3 on the periphery of the portion of the substrate 1 where the guide groove 2 is provided, and the optical recording medium 4 is placed on the guide groove 2.
Is provided so as to cover a part of the design print 3, and the backing material 6 for protecting the optical recording medium 4 via the adhesive layer 5 thereon.
Are laminated.

In the present invention, the substrate 1 is a support plate for the optical recording medium 4, is transparent to recording / reproducing light, and has a guide groove 2 for recording / reproducing signals on one surface thereof.

The guide groove 21 has a repeating pitch of 1 to 20 μm,
It consists of a trench for recording and a bank for recording.

The guide groove 2 is processed by a plastic molding technique such as injection, compression or embossing that utilizes the thermoplasticity of the substrate, or a photopolymer is applied on the surface and is stamped with a stamper and then photocured. It is formed by the so-called 2P method.

Any material may be used as the material of the substrate as long as it is optically transparent, especially near infrared light near the recording / reproducing wavelength of 830 nm. Specifically, a glass plate, a quartz plate, a plastic called organic glass, such as acrylic resin, polycarbonate, styrene, vinyl chloride, aryl resin, TPX resin, CR-39, or a laminate of these can be used.

Further, it is preferable that the substrate be optically isotropic, that is, have a small birefringence.

The optical recording medium 4 is one in which recording / reproduction or reproduction is performed by a light beam, and the recording mechanism may be a so-called heat mode recording in which a recording mechanism is a photochemical reaction or a light is absorbed and its heat is generated. It is possible to read by changing the reflection or transmission of the reproduction light by the recording. For such things, by light or heat,
For example, there are those that utilize the change in reflectance due to phase change, those that change their physical properties and those that change their shape, such as pit recording, and any of these may be used in the present invention.

As those satisfying these characteristics, those known as conventional optical disk memory materials and optical recording media may be used, for example, Te, Bi, Sn, Sb, In and other low melting point metals and alloys thereof, cyanine-based, Squarium type, phthalocyanine type,
Tetradehydrocholine-based, methine-based, naphthoquinone-based dyes and pigments and organometallic complexes such as benzene-dithiol nickel complex can be preferably used.

The backing material 6 has a purpose of mechanically protecting the optical recording medium 4, and can be made of plastic, metal, ceramics, glass plate, paper or a composite material thereof.

The backing material may be transparent or opaque by itself, as long as it satisfies the above-mentioned purpose.

These are rather decided by the reading method of optical information, and it is inevitable that a transparent reading method is transparent, and the requirement for birefringence is the same as that for the substrate, and its material is not limited by itself. is there.

If it is a reflection type reading method, the backing material may be opaque and the selection range of the material is wide.

In addition, these backing materials are 0.1 mm to 0.6 mm for optical cards.
The thickness of the substrate, the optical recording medium and, if necessary, the adhesive layer are adjusted to be 0.76 mm.

This backing material is usually laminated directly on the optical recording medium so as to be in direct optical contact without an air layer, and an adhesive layer 5 may be interposed if necessary.

Examples of the adhesive layer 5 include known adhesives such as vinyl acetate, acrylic acid ester, vinyl chloride, ethylene, acrylic acid, and vinyl monomer polymers and copolymers such as polyamide, polyester, and polyether. Thermoplastic adhesive, amino resin (urea resin, melamine resin), phenol resin, epoxy resin,
Thermosetting adhesives such as urethane resin and thermosetting vinyl resin, and rubber-based adhesives such as natural rubber, nitrile rubber, chloroprene rubber and silicone rubber are used.

In the present invention, the design printing 3 uses an ink having excellent printability. For example, various inks are adjusted depending on the printing style and the material to be printed.

The printing method is not particularly limited, and examples thereof include gravure printing, screen printing, letterpress printing, intaglio printing, and the like.

The thickness of the design printing is usually 10 to 300 μm, preferably 10 to 150 μm.

[Operation] The optical record carrier of the present invention is an optical card in which an optical recording medium capable of recording / reproducing or reproducing by light is provided on a substrate having a guide groove, and a backing material is laminated on the optical recording medium. In the above, since the design printing is performed on the optical recording medium surface side on the substrate, it is possible to preliminarily perform design printing with multicolor and high positional accuracy on the optical recording medium surface side on the substrate by using ink with excellent printability. By providing it, it is possible to provide an optical record carrier that does not lose the design effect even if the optical recording medium is slightly rough-coated or vapor-deposited thereafter.

[Examples] Hereinafter, the present invention will be described more specifically with reference to Examples.

Embodiment 1 An explanation will be given based on FIG. 1 and FIG.

A 0.4 mm thick acrylic plate (Clarex S, registered trademark: Nitto Jushi Kogyo Co., Ltd.) is used as a substrate, and the compression
mpression), groove width 3μm, depth 0.3μm, bank 9μ
A guide groove having a width of m and a pitch of 12 μm is provided.

On the guide groove side of this substrate, a design printing having a thickness of 100 μm, mainly a logo, was performed by gravure printing around the guide groove portion. At this time, the printing accuracy is ± 0 with respect to the guide groove.
It was 5 mm.

An optical recording medium of a methine dye represented by the following formula (I) was applied to this printed substrate to form an optical recording medium having a film thickness of 1000 ± 100Å.

Formula (I) Then, using thermoplastic adhesive as the adhesive, the thickness
An optical card was obtained by bonding backing materials of a 0.3 mm acrylic plate (Clarex S, registered trademark; manufactured by Nitto Jushi Kogyo Co., Ltd.).

At this time, when the optical recording medium is applied, the design printing portion covers even if the guide groove portion is protruded, so that mass productivity can be improved.

[Effects of the Invention] As described above, the optical record carrier of the present invention can be improved in design accuracy by performing preliminary design printing on the surface of the optical recording medium surface on the substrate.

The above design accuracy can be obtained even if the productivity is increased.

When providing the optical recording medium, it is not necessary to worry about misalignment by stacking it on the design print.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of the optical card of the present invention, and FIG. 2 is an explanatory view showing a state in which design printing is applied to a substrate. 1 ... Substrate, 2 ... Guide groove 3 ... Design printing, 4 ... Optical recording medium 5 ... Adhesive layer, 6 ... Backing material

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Claims (1)

[Claims] 1. An optical record carrier having a substrate having a region having a tracking groove on a part of the surface thereof, an optical recording medium capable of recording / reproducing or reproducing by light, and a protective substrate, the tracking of the surface of the substrate. An optical recording medium carrier, wherein design printing is applied to an area other than the groove forming area, and the optical recording medium is formed by coating the area having the tracking groove of the substrate and the design printing.