Media optical storage device

 

(57) Abstract:

The proposed device relates to techniques for recording and reproducing information of the optical radiation. The storage medium comprises a transparent substrate, a recording medium, reflective and protective layers. The reflective layer is made of aluminum or gold. The recording medium consists of reflective and reactive layers. The reflective layer is made of bismuth or indium, or tellurium, or tin, or antimony, or lead, or titanium, or zinc, or chromium, or Germany, or copper, or cadmium, or gold, or aluminum or silver. Chemically active of the glassy alloy of arsenic-sulfur, or arsenic-selenium, or germanium-sulfur, or germanium-selenium or arsenic-germanium-sulfur, or arsenic-germanium-selenium or arsenic-germanium-sulfur-selenium. The technical result from the use of the present invention is to enhance the optical region of the spectrum with a high reflection coefficient and increasing climatic reliability of the information carrier. 1 Il.

The present invention relates to techniques for recording and reproducing information of the optical radiation and is intended for use in optical ZAPADNOGO range.

Known storage media for optical recording, consisting of a substrate made of a transparent material, and recording medium with sequentially deposited reflective and protective layers [1]. As the material of the recording medium selected Sb2Se3the reflective layer - Bi2Te3. When recording information is material transfer recording medium from the amorphous state to the crystal, which leads to an increase of the reflection coefficient from 10 to 40%. The device has the following disadvantage: relatively small reflectance.

The prototype of the present invention is an optical media storage device consisting of a substrate made of a transparent material, and recording medium with sequentially deposited reflective and protective layers [2]. The reflective layer is made of aluminum, and the recording medium is made of an alloy of tellurium, arsenic, and selenium with the following composition, at.%: Te 10-35, As 2-15, Se 50-88. To extend the optical media with different types of laser radiation required high reflectivity (>60%) in a wide range opticheskoy waves more than 650 nm. Relatively low softening temperature of the recording medium (60-90oC) reduces climate resilience media.

Thus, the main drawback of the prototype is limited spectral range with high reflectance.

Another disadvantage of the device prototype is the low temperature conversion of the recording medium, which reduces the reliability of information storage in the temperature range 60-90oC.

In connection with these technical and technological results of the use of the device on the prototype there is a problem of creation of the media, optical storage device, intended for use in the storage of information with a single entry and multiple disabilities, in particular in the household, and having a high reflectance in a wide region of the optical spectrum and increased reliability of information storage in the temperature range of 60-90oC.

The problem is solved as follows. In known storage media, optical storage device, consisting of a substrate made of transparent materially layer made of aluminum or gold, as the recording medium of two successively applied layers, the reflective layer of bismuth, indium, tellurium, tin, antimony, lead, titanium, zinc, chromium, germanium, copper, cadmium, gold, aluminum or silver and chemically active layer of glassy alloy of arsenic-sulfur, arsenic-selenium, germanium-sulfur, germanium-selenium, arsenic-germanium-sulfur, arsenic-germanium-selenium or arsenic-germanium-sulfur-selenium.

The technical result from the use of the proposed device is to increase the temperature range storage reliability of information while maintaining its sensitivity.

The main technical advantage of the present invention in comparison with the prototype is to increase the spectral range with a high reflection coefficient due to the presence in the recording environment, additional reflective layer with high reflectivity in a wide spectral range.

The drawing shows the layered structure of the recording media. The storage medium consists of a substrate 1 made of transparent material, the recording medium comprising a reflective layer 2, and a chemically active layer 3, a reflective layer 4 and protective layer 5.

The material of the reflective layer of the recording medium should have a high reflectance in a wide spectral range and have a high castlegate ability to form with the material of the reflective layer of the recording medium glassy connection with significantly lower reflectance, than the reflective layer of the recording medium.

The material of the reflective layer should have a high reflectance in a wide region of the spectrum and be inert to the materials of the recording medium. Aluminum or gold fully satisfy these requirements. The protective layer protects the media from external influences. It is preferable for the protective layer of the curable by ultraviolet radiation polymer.

Example 1. Media optical storage device is manufactured as follows. On a polycarbonate substrate with a thickness of 1.2 mm, a diameter of 120 mm by the method of thermal evaporation consistently put a layer of bismuth with a thickness of 30 nm, a layer of sulphide of arsenic in the thickness of 40 nm, and a reflective layer of aluminium of a thickness of 150 nm. A protective layer with a thickness of 10-20 μm from vodootvedenija polymer to aluminum by centrifuging on the air, followed by hardening under the action of ultraviolet radiation.

The reflection coefficient of the recording media to record is 65%, the reflectance after recording is 10% at a wavelength of 790 nm. Media working temperature from -30 to 90to, temperature 30oC at a relative humidity of 95% within 10 days.

Example 2. On a polycarbonate substrate with a thickness of 1.2 mm, a diameter of 120 mm by the method of thermal evaporation consistently put a layer of indium thickness of 25 nm, the layer selenide Germany thickness of 50 nm, and a reflective layer of gold with a thickness of 100 nm. A protective layer with a thickness of 10-20 μm from vodootvedenija polymer to gold by centrifuging on the air, followed by hardening under the action of ultraviolet radiation.

The reflection coefficient of the recording media to record is 75%, the reflectance after recording is 8% at a wavelength of 635 nm. Media working temperature from -30 to 80oC; can withstand temperatures 70oC for a long time (10-20 days) without derating, temperature 30oC at a relative humidity of 95% within 10 days.

Example 3. On a polycarbonate substrate with a thickness of 1.2 mm, a diameter of 120 mm by the method of thermal evaporation consistently put a layer of tellurium with a thickness of 30 nm, a layer of sulfide Germany with a thickness of 110 nm, and a reflective layer of gold with a thickness of 120 nm. A protective layer with a thickness of 10-20 μm from vodootvedenija polymer nanosit radiation.

The reflection coefficient of the recording media to record is 56%, the reflectance after recording is 88% at a wavelength of 790 nm. Media working temperature from -10 to 40oC; can withstand temperatures 40oC for a long time (10-20 days) without derating, temperature 30oC at a relative humidity of 95% within 10 days.

The reflective layer of the recording medium has a thickness of 8 to 40 nm. When the thickness that is less than 8 nm, decreases the reflectance of the reflective layer of the recording medium. When the thickness is, for the most 40 nm, decreases the sensitivity of the reflective layer of the recording medium by increasing the amount of energy required for transfer of substances in the molten state. The active layer of the recording medium has a thickness of 20-400 nm. When the thickness that is less than 20 nm, it turns out the low optical contrast records and hindered the formation of connections between the substances of the metal layer and the active medium. When the thickness of the active layer, most 400 nm, also degrades the optical recording contrast and increases the complexity of manufacture of the storage medium without improving its characteristics.

As the material of the carrier substrate information the recording medium can be used in methods of high-frequency magnetron and thermionic deposition using evaporation of a special form. The deposition rate of 0.5-50 nm/s, the pressure of residual gases in the chamber 10-3-10-5mm RT.article.

The material of the reflective layer, aluminum or gold, is applied by cathodic sputtering in a vacuum thickness of 60-150 nm. As a material of the protective layer used fototerapia polymers based epoxyacrylate. A protective layer is applied by centrifuging in the air with a thickness of 10-20 μm, followed by curing under the action of ultraviolet radiation.

Sources of information

1. French patent N 2536197 And class. G 11 7/24, 18.05.84.

2. Patent of Russia No. 2127915 C1, class G 11 7/24, 18.06.98.

Media optical storage device consisting of a substrate made of a transparent material, and recording medium with sequentially deposited reflective and protective layers, wherein the reflective layer is made of aluminum or gold, and recording medium of the two successively applied layers, the reflective layer of bismuth or indium, or tellurium, or tin, or antimony, or lead, or titanium, or zinc, or chromium, or Germany, or copper, or cadmium, or gold, or aluminum, or silver and chemically active layer CTE is project-sulfur, or arsenic-germanium-selenium or arsenic-germanium-sulfur-selenium.

 

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Media // 2010358
The invention relates to media devices digital audio, video, optical external storage devices of computers

The invention relates to recording devices and/or reproduction of information with mutual relative movement of the optical storage medium and the optical head and can be used in the information technology, such as devices, digital audio, digital video, optical external storage devices of computers

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

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FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

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FIELD: optical data carriers.

SUBSTANCE: device has cation dye or mixture of cation dyes with optical characteristics, changed by means of recording beam, an at least one substance with functions of damper and phenol or substituted phenol with one hydroxide group or more, while it additionally contains phenol or substituted phenol in form of phenolate ion, forming a portion of anions for dye cations, as a stabilizer. Data carrier can contain anionic metal-organic thyolene complex as damper, which forms other portion of anions for dye cations.

EFFECT: higher stability, higher durability, lower costs.

5 cl, 1 tbl, 3 ex

FIELD: optical data carriers.

SUBSTANCE: device has tracks, each of which is comprises multiple recesses, formed on basis of first data, meant for recording, and areas between recesses. Multiple recesses are displaced from track center on basis of second data, at the same time recesses cross central position of track with given periodicity. First data may be recorded analogically to compact disk data. Second data may be separated from signal of track tracking error. Second data may be used for copy protection in relation to first data, while amount of first data, which can be recorded on carrier, does not decrease when recording second data, and as a result of recesses displacement range being set within limits of preset value in range, wherein no track tracking displacement occurs, first data can be played back by existing players to provide for compatibility of playback.

EFFECT: higher efficiency.

8 cl, 12 dwg

FIELD: optical discs that can be manufactured with the use of one and the same process parameters.

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EFFECT: enhanced reliability of signal recording and reproduction.

64 cl, 18 dwg

FIELD: technologies for manufacturing optical disks for storing information, in particular, development of fluorescent substance and method for manufacturing WORM-type optical disks based on it.

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EFFECT: improved efficiency of recording/reproducing systems and information preservation on basis of WORM-type optical disk with fluorescent reading.

3 cl, 2 dwg, 3 ex

FIELD: engineering of information carriers and appropriate reading and recording devices.

SUBSTANCE: variants of information carrier contains information about its configuration recorded thereon as well as information about inertia moment of current information carrier. Recording device contains means for determining physical characteristics of utilized information carrier by reading information about configuration and information about inertia moment from wobbulated groove of information carrier, and recording control means, applying corrections for performing recording process in accordance to physical characteristics of information carrier. Reading device contains means for determining physical characteristics of information carrier by reading information about configuration and information about inertia moment, and recording control means, applying corrections for performing reading operation in accordance to physical characteristics of information carrier.

EFFECT: simple and precise process of determining physical characteristics of information carrier, possible adjustment of reading and recording operations.

4 cl, 93 dwg

FIELD: engineering of devices for information storage.

SUBSTANCE: device for information storage contains disks with information carrying layer mounted with possible rotation relatively to common axis, disks rotation drive, reading and/or recording head, positioned on the side of end of one of edge disks and directed towards the latter by its active zone, and also drive for moving aforementioned head in plane, parallel to rotation plane of disks. Information carrying layer at least on one disk, positioned on the side of head, is made with forming of window, transparent for signal, emitted and/or read by head and having shape matching movement trajectory of head, and disks rotation drive is made with possible independent rotation of disks and holding in position, providing for positioning of window in front of active zone of head.

EFFECT: increased efficiency.

8 cl, 4 dwg

FIELD: engineering of data carrier, and of recording and reading devices, compatible with such a data carrier.

SUBSTANCE: each variant of aforementioned data carrier contains recording track, formed by a stream of recesses on the surface of carrier, data of recess represent information recorded on it, which contains main data and sub-code. In accordance to one of variants, information about physical characteristics of current data carrier is recorded in sub-code. In accordance to other variant, data carrier contains multiple individual reading/recording zones, physical characteristics of which are different, and each one of aforementioned zones contains zones for input, zones for program and ones for output, while in sub-code of input zone of each one of aforementioned zones, information about physical characteristics of appropriate individual reading/recording is recorded as well as information about starting position of input zone of next individual reading/recording zone. Each one of variants of recording device contains a certain device for determining physical characteristics of aforementioned data carrier by reading information about these from sub-code, and each variant of reading device contains aforementioned determining device and device for controlling reading.

EFFECT: increased quality of reading and writing of information.

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FIELD: optical recording technologies, namely, engineering of two-layered optical disks with high recording density, and of devices for recording/reproducing from them.

SUBSTANCE: two-layered optical disk with high recording density contains first recording layer and second recording layer, positioned on one side of central plane, dividing the disk in half along thickness, close to surface, onto which light falls. First thickness of substrate from surface, onto which light falls, to first recording layer has minimal value over 68,5 micrometers, second thickness of substrate from surface, onto which light falls, to second recording layer has maximal value less than 110,5 micrometers, while refraction coefficient is within range 1,45-1,70.

EFFECT: minimization of distortion of wave front, provision of possibility of more precise recording of signals onto optical disk or reproduction of signals from optical disk.

8 cl, 10 dwg

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