JPS58112793A - Optical information recording member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ninth optical information recording member that performs p-device reproduction by causing a state change with an applied high-density energy beam of laser light.

In the past, many optical information storage media have been developed for laser writing, including recording media using metals, semimetals, and non-recreational vapor-deposited films, as well as recording media based on the heating of dry plates. There are recording media that can form a film.

However, entertainment, metalloid and non-entertainment W-based recording media are expensive and require a large number of patches because they are generally manufactured by vacuum forming in a patch system rather than a continuous system. Therefore, it is difficult to achieve the quality consistency required for mass production of products.

Furthermore, since the method of forming a reflective film by heating a silver dry plate is a coating method, it is suitable for mass production, but there is a problem that the n ratio is low because it is a dispersion system of silver particles. .

In addition, so-called [
:DRAV(aireot reaa after w
rite) J media requires conditions such as (1) high reflectance since it requires focus control of ±1μ during recording, and (2) a core that has strong absorption for the laser used. , Therefore, metals have hitherto been used as materials that meet these conditions. However, the use of metals has inherent problems as described above.

Therefore, as a result of extensive research in view of the above problems, the present inventor developed a recording member that satisfies the conditions (1) and (2) above by using naphthoquinone dye as a material other than metal, and the present invention. 9, which leads to the completion of.

That is, the optical information recording member of the present invention is an optical information recording member for performing small recording and reproduction by causing a state change with a high-density energy beam, and is characterized by providing a thin film layer of naphthoquinone dye. It is.

The optical information recording member of the present invention is basically formed by forming a thin film layer of naphthoquinone dye on a substrate, but other layers may be provided above or below this dye thin film layer depending on the purpose. can.

The naphthoquinone dye used in the present invention has a 7-toquinone skeleton (mostly 1,4-7-toquinone), that is, a naphthoquinone in which R1 and R2 have an electron-donating group, sR5 and R4 have hydrogen atoms, and 9 electron-withdrawing groups have been introduced. It is a derivative and has absorption peaks in the visible and near infrared regions of 400 to 800 nm. This naphthoquinone derivative has high selectivity depending on the laser light used. The above-mentioned electron-donating group is generally a group that tends to donate electrons to others when hydrogen is the standard in the molecule, such as an amino group, an alkylamino group, an allylamino group, anilino group, a hydroxyl group, or an alkoxy group. In addition, the above-mentioned electron-withdrawing group is a group that tends to attract electrons from others when hydrogen is the standard in the molecule, such as a nitro group, carbonyl group, carboxyl group, nitrile group, or halogen. The above naphthoquinone dyes are synthesized by Shikizaisha Co., Ltd., for example.

425 (1981) and J, Oh@m, Re5aar
ah 1978.

(s) 180; (M) 2319.

The substrate materials used in the present invention are known to those skilled in the art and can be either transparent or opaque to the laser light used. However, when writing with a laser beam from the substrate side, it must be transparent to the writing laser iK.On the other hand, when writing from the side opposite to the substrate, that is, the surface of the recording layer, the writing laser beam must be transparent. However, it must be transparent to the readout laser beam when the hemline playback is performed using transmitted light, and it must be transparent to the readout laser beam when readout and playback is performed using reflected light. i9 may be opaque or opaque. The substrate material may be a support for commonly used recording materials such as glass, quartz, ceramics, plastics, paper, plate-shaped or foil-shaped metal. Improved safety, recording sensitivity,
Typical plastics that are suitable in terms of flatness, light weight, processability, etc. are vinyl chloride resin, vinyl vinegar resin, acrylic resin, methacrylic resin, polyester resin, nitrocellulose, polystyrene resin, polypropylene resin, and polyamide. Examples include resin, polystyrene resin, polycarbonate resin, and epoxy resin.

Generally, the dye thin film layer in the present invention can be formed by coating a substrate with a solution in which a naphthoquinone dye is dissolved in an organic solvent.

As the organic solvent, for example, benzene, dichloroethane, etc. can be used. Application is carried out by conventional coating methods such as spraying, coating, dipping and spinning.

The laser beam applied to the original information recording member of the present invention must be selected depending on the absorption wavelength of the dye. Therefore, depending on each dye, 12. He-Cd1mr, He-
No. Ruby, dye, semiconductor laser, etc. are selected.

Next, a method for arranging and reproducing information on the optical information recording member of the present invention will be explained with reference to the accompanying drawings.

Using an information recording and reproducing device as shown in the figure.

Laser light outputted from the laser light source 1 passes through the amplifying and polarizing beam splitter 2, the % wavelength plate 6, and the condensing lens 4, and passes through the dye thin film of the disc-shaped original information recording member 7, which is rotated by a motor 9, etc. The light is focused on the layer 8, and information is recorded and reproduced. Recording and reproducing information is performed by extracting the reflected light from the dye thin film layer 8 through the input splitter 2 and guiding it to the photodetector.

Examples will be given below to specifically explain the present invention, but the present invention is not limited thereto.

The naphthoquinone dye α2F described in the example below was dissolved in an organic solvent 10-1, and this was coated on an acrylic substrate by dipping method (dipping speed t3cl11/sec) to the film thickness shown in the table, and dried with an infrared lamp. 9. Producing an optical information recording member.

When the recording members thus obtained were irradiated with laser light under predetermined conditions using the apparatus shown in the attached drawing, clear holes (pits) were obtained in the irradiated area, and all members were rated as 3011B.
The above BlN ratio (CL 5 M [(z.

It can be seen that the IC silver can provide good information with an optical bandwidth of 3QKHg (measured with a bandwidth of 3QKHg) and is good as an optical recording member. Note that the information recording conditions are H-Me as a laser.
When using a laser beam, the beam pole is 2.4 μms and the sickle surface power is 8 mW, and when using a semiconductor laser beam,
The beam diameter was 15 .mu.m, the recording surface power was 4 mW, and the irradiation time was 1 .mu.sec.

[Brief explanation of the drawing]

The accompanying drawings show an information recording and reproducing device. 1... Laser light source, 2... Polarizing beam splitter,
5... Local wave plate, 4... Condensing lens, 7... Optical information device member, 8... Dye thin film layer, 9... Motor. Patent Applicant Riko Co., Ltd. - Procedural Amendment February 1, 1980 Commissioner of the Japan Patent Office Shima 1) Haruki Tono1, Indication of the Case 1982 Patent Application No. 2099523, Person making the amendment Relationship with the case Patent applicant address: 1-3-6 Nakamagome, Ota-ku, Tokyo Name (67
4) Ricoh Co., Ltd. -4, Agent 5, Date of amendment order (voluntary) 2 Contents of amendment 1) The scope of the patent claims will be amended as shown in the attached sheet. 2) On page 11, line 4, after “Condensing lens,” read “5...
・Add photodetector. The above 2 * A thin film layer of 7-toquinone dye is supported on the substrate, and a state change is caused by a high-density energy beam.] Optical information device components.

Claims (1)

[Claims] The inclusion of the substrate and the thin film layer of naphthoquinone dye is defined as 411 microns. The ninth optical information device component that reproduces the layout by causing a state change using a high-density energy beam.