JPS6069845A - Information recording carrier - Google Patents

Abstract

PURPOSE:To prevent decrease in reflectivity of a reflecting film and formation of pinholes of said film and to form the reflecting film so as to withstand use in environment at and under high temp. and high humidity by forming a protective material for the reflecting film having a larger tendency to ionization than the reflecting film on the reflecting film. CONSTITUTION:A reflecting film 2 for reflecting light is laminated on a transparent base body 11 according to the rugged surface thereof and a protective material 13 for the reflecting film is laminated thereon. A paint contg. a material having a higher tendency to ionization than the film 12, for example, a paint contg. zinc such as a coated film of zinc-rich paint or the like is used for the material 13. The above-mentioned zinc-rich paint refers to an epoxy resin or the like in which a large mat. of pouverous zinc powder is incorporated. A protective film 14 consisting of, for example, a resin coated film or the like is further laminated on the material 13. Then the zinc in the zinc-rich paint acts as a sacrifical anode to provide an effect of preventing electrolytic corrosion of the film 12 even if water or oxygen intrudes in the film 12 and the material 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an optical information recording carrier, such as a video disk, which is provided with a light-reflecting optical structure on one side, and particularly relates to an optical information recording carrier, such as a video disc, which is provided with a light-reflecting optical structure on one side, and in particular, to prevent chemical damage such as corrosion of the reflective film. The present invention relates to an information recording carrier with improved physical changes.

[Technical background of the invention and its problems]

Recently, optical information recording carriers have been used for recording information on six squares, etc., taking advantage of their recordability during opening.

That is, as shown in FIG. 1, in a normal optical information recording carrier, its base structure is made of, for example, aluminum, on a transparent base 1 made of, for example, transparent plastic and having unevenness on one side, in order to reflect light. A reflective film 2 is laminated, and on this reflective film 2, for example, a resin coating film or the like as shown in Table 9 is laminated.
No protection to protect aluminum and information storage! +4
i'l'': '+J' is formed by stacking 3.

However, if such information recording carriers are left in a particularly hot and humid environment for a long time, the reflective film will gradually undergo chemical changes such as corrosion due to the influence of moisture and oxygen temperature, resulting in pinholes and reflectance. cause a change in In this state
In this case, these are detected as noise when information is reproduced, so that good reproduction information cannot be obtained and performance is degraded.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an information recording carrier that can prevent a decrease in the reflectance of a reflective film and prevent pinholes, and can withstand use for a long time, especially in a hot and humid environment. With the goal.

[Invention, song, essential]

The present invention relates to an optical information recording carrier having a reflective film for reflecting light on a Tachimei substrate formed by recording information with unevenness, in which the reflective film is ionized to prevent chemical changes in the reflective film. This is an information recording carrier made by attaching a material that guarantees a reflective film with a high tendency to a reflective film.

[Embodiments of the invention]

Examples of the present invention will be described in detail below.

FIG. 2 shows one embodiment of the present invention. That is, on a transparent substrate 11 made of, for example, transparent plastic, on which information is recorded on an uneven surface, a reflective film 12 made of, for example, aluminum is laminated according to the uneven surface. A reflective film protective material 13 is laminated on this reflective film 12.This reflective film protective material 13 has a reflective film of +17412 to prevent chemical changes in the reflective film 12.
Paints containing SA, which have a higher ionization tendency, are paints containing zinc, such as zinc-rich Indian coatings. In addition, the zinc-rich paint in the present invention contains a large amount of finely powdered zinc powder in a resin, and is, for example, one in which finely powdered zinc is contained in +fij resin such as epoxy resin or acrylic resin. A protective film 14 made of, for example, a resin coating is laminated on the reflective film protective material 13 to protect the reflective film and the information recording portion.

In the 4J information record carrier constructed as described above, the water and element penetrating from the aluminum reflective film 12 and the reflective film
2 substances 13 are impregnated, except for the reflective film protective substance 13 as a sacrificial anode. - A reaction of Zn − + ZP + 2e − occurs in the zinc in the sink rich paint.
The aluminum reflective film 12 itself has a negative potential. In this way, the potential of the reflection Jlj412 of aluminum becomes noble, corrosion of zinc takes precedence over aluminum, and the galvanic corrosion protection effect of reflection 1 and 12 of aluminum forming the reflection surface is exhibited. Since one side of the aluminum reflective film 11 and 12 is coated with a zinc chloride and antibacterial protective material 13, it is possible to prevent the intrusion of moisture and reduce the reflectance due to corrosion of the aluminum reflective film 12. can be prevented.

Next, we conducted a forced deterioration test under a high-temperature and high-humidity environment (Cε) on the information recording ff video disc according to the specific embodiment of the present invention, and measured the change in the R time of the disc's temperature. , and a comparative example in which the zinc-rich indium layer was not provided are also shown in -j part 1.

○Specific Example Photorenost was applied to a glass plate with a surface of 7:1 by a spin code, and a video (1゛f report) was recorded using a laser beam. A molding die (stamper) was made using the master, mother, and stamper in that order, and a transparent molding plate with unevenness on one side was obtained by injection molding a polycarbonate wooden box.Next, An aluminum reflective film was provided only on the information recording surface by vacuum evaporation, and a zinc-rich paint was further applied to form a host anode layer.After that, a zinc-rich paint layer was coated with ultraviolet curable acrylic Imo-1 oil coating Nemi-1. The film was coated on top of the film and cured with ultraviolet light to obtain a video disc.

O Comparative Example A video disc was produced in substantially the same manner as in the above-described specific example, except that only the zinc-rich ind layer was not formed.

The video disc thus produced was heated to 60°C.

Long-term aging was performed in an atmosphere of 901 RH, and changes over time in the video signal (SN ratio) during playback were measured and evaluated. The results are shown in Table 1.

As is clear from Table 1, the deterioration rate of the disks of the specific examples was smaller than that of the comparative examples, and data showing little change over time was obtained. Also under the microscope these disks (after accelerated testing)
When the opposite film was inspected (f'

From the above results, the present invention is considered to be a very effective and excellent method for improving the performance of optical information recording carriers.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to prevent a decrease in the reflectance of the reflector and the ivy and pinholes, withstand use in a high temperature and humid environment for 1 year and 1 year, with a small rate of deterioration, and to be able to withstand use over time. It is possible to capture and provide an optical information recorder with little change.

[Brief explanation of drawings]

FIG. 1 does not show a conventional optical information recording carrier, and FIG. 1 and FIG. 2 are cross-sectional views showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Transparent substrate, 12... Reflective film, 13... Reflective film bare part material, 14... Protective film.

Claims (2)

[Claims] (1) A transparent substrate on which information is recorded with unevenness, a reflective film that reflects light that is laminated on the unevenness of this transparent substrate, and a substance that has a greater ionization tendency than the reflective film that is laminated on the reflective film. 1. An information recording carrier comprising a reflective film and a deep material containing wave particles. (2) Enclosure 1' of a patent claim characterized in that a paint containing zinc is used as the reflective coating material.
f): Information recording carrier according to i.