JPS63282941A - Preformatted optical recording medium and optical recording card having preformatted optical recording medium - Google Patents

Abstract

PURPOSE:To mass-produce an optical recording medium by separately preparing an optical recording element assembly layer having no preformat pits and a protective film having a pit pattern, and adhering the film to the layer by pressing. CONSTITUTION:The optical recording element assembly 3 is formed on a substrate 2, and the protective film 4 having a preformat pit pattern 6 on the inside is prepared. The pattern 6 has the ruggedness reverse to those of the preformat pit 5 provided on the optical recording element assembly 3. When the protective film 4 is adhered to the optical element assembly layer 3, the pattern 6 is pressed on the optical recording element assembly layer 3, and the preformat pit 5 is formed. By this constitution, the recording card having a preformatted optical recording medium can be mass-produced.

Description

Detailed Description of the Invention (a) Purpose of the Invention [Field of Industrial Application] This invention relates to optical recording media, particularly writable (DRAW) media.
The present invention relates to optical recording media (type) and optical recording cards having optical recording media, and more specifically relates to pits for preformatting in optical recording media.

Optical recording media are used to optically record audio, image, and other signals, and are used in disks and cards. In particular, in recent years, cards on which various types of information are recorded have become popular, such as ID cards, cash cards, and bank cards.

[Prior Art] Disks using optical recording members are widely used as recording members for digital signals such as audio and images. In addition, it is necessary to record various information such as personal data and issuing company data on the above-mentioned card.
Such information is recorded in visible characters and symbols,
In addition, in the later stages, electrical signals using magnetism are used to record data, but it is necessary to prevent tampering and cope with an increase in the amount of information.

To this end, optical recording media using laser technology have recently been developed. This optical recording medium includes an optical recording element having an optical reflective surface and a protective film thereon. The optical recording element 102 includes a substrate 10 as shown in FIG.
an organic material-based recording material 10 containing a dye formed on 4;
5, or as shown in FIG. 6, a single layer metal film 10 made of a metal with good writability and high light absorption rate, such as Te, formed on a substrate 1041.
6, or as shown in FIG.
A reflective film 107 is formed on AΩ etc. on 04, and S
There is a structure in which an interference layer 108 is formed of iO2 or the like, and a metal film 109 of Ti or the like is further formed thereon.

By the way, optical recording media require track guide grooves for tracking during writing, reading, and erasing, and pits for preformatting that indicate address areas that indicate the position and usage status of each sector of each track. Yes, these preformatting pits are
It is written in advance on the optical recording medium in a non-erasable form.

Conventionally, an injection method or a photopolymer method has been used to form such pits for preformatting.

As shown in FIG. 8, the injection method uses a stamper having a pit pattern 111 for preformatting.
A resin for the substrate is injected onto the substrate 112 and molded to create a substrate 104 having a pit pattern for preformatting formed in this way.
The optical recording medium 101 thus formed has pits 113 for preformatting.

In the photopolymer method, as shown in FIG. 9, a layer 114 of ultraviolet curing resin is formed on a transparent substrate 104, and a pit pattern 111 for preformatting is formed on this layer.
The layer 114 of the ultraviolet curable resin is cured by irradiating ultraviolet rays 115 while pressing a stamper 112 with a handle to make a mold.

Furthermore, a film of the optical recording element body 102 is formed thereon. The optical recording medium 101 thus formed has pits 113 for preformatting.

[Problems to be Solved by the Invention] However, in the conventional optical recording medium in which the required preformat pattern is formed in advance on the optical recording element itself, the optical recording medium cannot be used in any system other than a specific system. The body becomes unusable. That is, among the constituent elements of an optical recording medium, the manufacturing conditions for the optical recording element are extremely strict, and therefore, although mass production is advantageous in terms of manufacturing efficiency, there is a demand for a wide variety of products and small lots. In some cases, the benefits of mass production cannot be fully utilized.

For this reason, we are developing an optical recording medium that can take advantage of the advantages of mass production for optical recording elements, and that can also be used in other systems to meet the demands of manufacturing a wide variety of products and small lots. Development is desired.

This invention was made in view of the above-mentioned circumstances, and it allows the optical recording element to take advantage of the advantages of mass production, and also allows the optical recording element to be used in a flexible system for high-mix, small-lot production. The object of the present invention is to provide an optical recording medium that can be applied to the manufacturing requirements of , and an optical recording card having such an optical recording medium.

(B) Structure of the Invention - 〇 - [Means for Solving the Problem] Corresponding to this object, a preformatted optical recording medium of the present invention includes a substrate, and a preformatted optical recording medium provided on the substrate and having a surface. An optical recording medium comprising an optical recording element in which preformat pits are formed, and a protective film adhered to the surface of the optical recording element, the protective film being formed on the surface of the optical recording element. The preformatted pits are characterized in that they are formed by transferring a preformatting pit pattern formed on the adhesive surface of the protective film onto the optical recording element by embossing.

Further, an optical recording card having a preformatted optical recording medium of the present invention includes a substrate, an optical recording element provided on the substrate and having preformatted pits formed on a surface thereof, and the optical recording An optical recording card in which an optical recording medium having a protective film adhered to the surface of the optical recording element is adhered onto a card base material, the optical recording medium being formed on the surface of the optical recording element. The preformatted pits are characterized in that they are formed by transferring a preformatting pattern formed on the adhesive surface of the protective film onto the optical recording element by embossing.

Hereinafter, details of one embodiment of these inventions will be explained with reference to the drawings.

In FIG. 1, 1 is an optical recording medium. Optical recording medium 1
has a substrate 2, an optical recording element layer 3 on the surface of the substrate 2 on the writing light incident side, and a protective film 4 laminated on the surface of the optical recording element layer 3.

As the substrate 2, for example, a vinyl chloride film with a thickness of 0.1 mm is used.

The optical recording element layer 3 is a layer that can form data bits when it is irradiated with writing light, and such an optical recording element layer 3 is composed of Te, , In, Bi
, TeOx, WO3, InO1AS203, MoO
2, TeAS1C82-Te, Te-C, As-8e-
8-Ge.

It is composed of optical recording materials such as dye-containing polymers, silver/polymer mixtures, and magneto-optical recording materials. The protective film 4 is made of a transparent material such as polyester, polycarbonate, or acrylic resin. A preformatting pit pattern consisting of a large number of preformat pits 5 is formed on the surface of the optical recording element layer 3 on the reading light incident side.

The preformatted pits 5 are obtained by transferring a preformatting pit pattern formed on the inner surface of the protective film 4 by embossing.

[Effect] Such an optical recording medium 1 is manufactured as follows.

That is, as shown in FIG. 2, a substrate 2 with an optical recording element layer 3 formed thereon is prepared. On the other hand, a protective film 4 having a preformatting pit pattern 6 inside is prepared. The preformatting pit pattern 6 is a preformatting pit 5 to be formed on the optical recording element layer 3.
The unevenness is the opposite.

This protective film 4 is adhered to the optical recording element layer 3. During this adhesion, the preformatting pit pattern 6 is pressed against the optical recording element layer 3 and transferred, thereby forming the preformatting pits 5.

(c) Effects of the invention In the optical recording medium configured as described above, the optical recording element layer 3 without preformatting pits and the protective film 4 having a preformatting pit pattern 6 are separately prepared and bonded together. Therefore, the optical recording element can take advantage of the advantages of mass production, and the optical recording element can also be used in other systems, making it possible to meet the requirements for manufacturing a wide variety of products and small lots.

[Structure of Optical Recording Card] In FIG. 3, 11 is an optical recording card. The thickness of the optical recording card 11 is approximately 0.76 m.

The optical recording card 11 includes the optical recording element layer 3 and the card back base material 12.
It is attached by adhesive 13.

The card back base material 12 guarantees the strength of the optical recording card 11, and such a card back base material 12 uses a synthetic resin board such as acrylic, epoxy, polyester, vinyl chloride, polysulfone, polyethersulfon, etc. be able to.

However, in the optical recording card 11 of this embodiment, the protective film 4 is also used as the card front base material, so the protective film 4 covers not only the surface of the optical recording element layer 3 but also the entire surface of the card back base material 12. There is. However, the preformatting pit pattern 6 is formed only in the portion facing the optical recording element layer 3.

The optical recording card 11 configured as described above is manufactured as follows.

That is, as shown in FIG. 4, first, the optical recording element layer 3 is temporarily adhered onto the preformatting pit pattern 6 of the protective film 4, and then this is attached to the card back base material 12 with an adhesive. Glue. When pressure is applied during this adhesion, the preformatting pit pattern 6 of the protective film 4 is transferred to the optical recording element layer 3 to form preformatting pits 5.

[Effects of optical recording card] In the optical recording card constructed in this way, the optical recording element layer 3 without preformatting pits and the protective film 4 having a preformatting pit pattern 6 are separately prepared and bonded together. Therefore, the optical recording element can take advantage of the advantages of mass production, and the optical recording element can also be used in other systems, making it possible to meet the requirements for manufacturing a wide variety of products and small lots.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an optical recording medium of the present invention, FIG. 2 is an explanatory cross-sectional view showing the manufacturing process of the optical recording medium, FIG. FIG. 5 is a cross-sectional explanatory diagram showing an example of a conventional optical recording medium. FIG. 6 is a cross-sectional explanatory diagram showing another example of a conventional optical recording medium. FIG. 8 is an explanatory cross-sectional view showing another example of a conventional optical recording medium, FIG. 8 is an explanatory cross-sectional view showing a conventional method of forming preformat pits, and FIG. 9 is an explanatory cross-sectional view showing another conventional method of forming preformat pits. FIG. 1... Optical recording medium 2-... Substrate 3... Optical recording element layer 4... Protective film 5... Preformatting pit 6... Preformatting pit pattern 11... Optical recording Card 12... Card back base patent applicant Kyodo Printing Co., Ltd. Patent attorney Osamu Kawai Figure 3 Figure 4 Figure 5 + 13 102 Figure 6 Figure 7 Figure 8 Ill 112 Figure 9 + 14 112 11++02
113 101

Claims (2)

[Claims] (1) An optical recording medium comprising a substrate, an optical recording element provided on the substrate and having preformat pits formed on its surface, and a protective film adhered to the surface of the optical recording element. The preformatted pits formed on the surface of the optical recording element are formed by transferring a preformatting pit pattern formed on the adhesive surface of the protective film onto the optical recording element by embossing. A preformatted optical recording medium characterized in that it is a preformatted optical recording medium. (2) An optical recording medium comprising a substrate, an optical recording element provided on the substrate and having preformat pits formed on its surface, and a protective film adhered to the surface of the optical recording element. The preformatted pit pattern formed on the surface of the optical recording element is a preformatted pit pattern formed on the adhesive surface of the protective film. An optical recording card having a preformatted optical recording medium, which is formed by transferring the above-mentioned optical recording element to the optical recording element by embossing.