Sony Corporation

Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Sony Corportion

Sony Dadc Corporation

Tetsuhiro Sakamoto

Jun Nakano

Goro Fujita

Toshiyuki Kashiwagi

Kazuhiko Fujiie

Junichi Nakai

Hirofumi Kondo

Yasuhito Tanaka

Yuki Tauchi

Toshitsugu Ono

Hisayuki Yamatsu

Motohiro Furuki

Takeshi Miki

Kazutomo Miyata

Masato Nishida

Hideo Kawachi

Naoki Okawa

Takayuki Asahina

Katsuhisa Aratani

Kiyoshi Ohsato

Minoru Tobita

Masahiko Kaneko

Ariyoshi Nakaoki

Makoto Watanabe

Hirotaka Miyamoto

Kouichi Yasuda

Etsuo Shibasaki

Yoshitake Yanagisawa

Shigeki Takagawa

Junko Saito

Kimu Higashimoto

Teruyuki Ota

Takashi Shimouma

Makoto Tsukahara

Takehide Endo

Inho Cho

There is provided an information processing device including an input unit to which words are input, an analysis unit configured to analyze meanings of the respective words, an image generation unit configured to generate single images corresponding to the respective words, and a display control unit configured to control the images generated by the image generation unit to be displayed on a display unit.

Information processing device, storage medium, and method

An information signal area on an information signal recording surface is provided as pits on a mirror in accordance with modulated information data, and is covered with a metal alloy reflective film. Sections that do not include pits corresponding to the information data are provided in the information signal area, and portions of the metal alloy reflective film on the sections are formed as perforated marks corresponding to the information data. In this case, the reproduction signal amplification level of a prepit signal and the reproduction signal amplitude level of a perforated mark signal can be obtained as substantially equal values by adjusting the depth and width of pits and/or adjusting the width and length of perforated marks. Hence, waveform distortion due to a waveform equalization circuit and variations in binary signals due to displacement of the slice level are reduced so that signals can be stably and reliably detected with the same reading apparatus.

Method for manufacturing read-only optical disc medium and read-only optical disc medium

An optical recording medium is provided. The optical recording medium includes a multilayer including an N (N&#x2266;5) number of interfaces capable of reflecting incident light.

Multilayer optical recording medium

A multilayer optical recording medium includes a plurality of interfacial surfaces that reflect an incident light beam, and neighboring ones of the interfacial surfaces has a spacer therebetween. When a light incident surface side is defined as an upper surface side, a different thickness layer unit including the spacers having different thicknesses arranged sequentially is disposed on the lowermost layer side, and the spacers each having a thickness different from the thickness of any one of the spacers arranged in the different thickness layer unit are sequentially arranged above the different thickness layer unit.

Multilayer optical recording medium with interfacial surfaces

[Object] To provide a durable read-only optical recording medium having less variances in characteristics of a metal reflective film due to a temporal change. [Solving Means] Provided is a read-only optical recording medium () including: a substrate (); an information recording surface onto which information is recorded by combining pits (P) and lands (L); and a metal reflective film () that is provided in contact with the information recording surface and represented by AlXZ, where x and z each represent an atomic %, X is constituted of an element including at least Ti, Z is constituted of an element including at least Fe, x is 1.0 to 3.0, and z is 0.05 to 1.0.

Read-only optical recording medium

An optical information recording reproduction apparatus includes: a first light beam source; a second light beam source emitting a beam with a wavelength shorter than that of the first light beam source; and an object lens condensing the beams from the first and second light beam sources to an optical information recording medium. When information is recorded in the optical information recording medium, a recording beam is emitted from the first light beam source and a beam used to generate a signal for controlling a position of the object lens is emitted from the second light beam source. When the information of the optical information recording medium is reproduced, a reproduction beam is emitted from the second light beam source.

Optical information recording reproduction apparatus and optical information recording reproduction method

An optical information recording method includes emitting light having a wavelength &#x3bb;from a first light source with a pulse width of time twor more and power P, emitting light having a wavelength &#x3bb;from a second light source with a pulse width of time tw, a repetition interval T, and power P, and performing information recording by simultaneously irradiating an identical part of a recording medium with the light from the first light source and the light from the second light source, in which the wavelength &#x3bb;and the wavelength &#x3bb;satisfy &#x3bb;&#x3e;500 nm&#x3e;&#x3bb;and &#x3bb;which is expressed as 1/&#x3bb;+1/&#x3bb;=1/&#x3bb;satisfies a relationship of &#x3bb;&#x3c;300 nm, and emission of the first light source and emission of the second light source satisfy relationships of tw&#x3c;tw, T&#x3c;tw, and P&#x3e;P

Optical information recording method, optical information reproducing method, optical information recording apparatus, and optical information recording and reproducing apparatus

A pirated optical recording medium may be determined which is produced by physically transferring a shape of pits and lands formed on a substrate of an optical recording medium. The optical recording medium is provided with excellent weatherability and long-term storage reliability. A reflective film formed of an Ag alloy film of AgXCu, where X is at least one element among Ti, W, Ta, V, Mo, Nb and Zr, is formed on a substrate on which main data is recorded with a combination of pits and lands. A mark may be formed so that a reproduction signal level in the recorded mark of auxiliary data write once recorded on the reflective film is increased, and a reproduction signal level is decreased in an optical recording medium prepared by physically transferring the surface shape of the pits and lands of the substrate. A pirated optical recording medium may be determined in this manner.

Optical recording medium having write once metal reflective film

An optical recording medium is provided. The optical recording medium includes at least a reflective film and a cover layer on a substrate; main data by a combination of pit and land are recorded on the substrate; a write-once recording is made to be possible on the reflective film by irradiating a laser light; sub-data are recorded by a mark that is formed by the irradiation of laser light for the write-once recording with respect to the reflective film; a reproducing signal level at portion where said mark is formed increases for the land of specified length; the mark by which the reproduced level decreases at the portion where the mark is formed is formed for an optical disc recording medium manufactured by physical copy; the reflective film is composed of an Ag-alloy film of AgX(0&#x3c;x&#x3c;100); and the X is selected from Ti, W, Ta, V, Mo, Nb and Zr.

Optical recording medium

An optical disk read only memory having an information recording surface with a concave-convex pattern formed on the basis of a first signal and a reflective film covering the surface. The disc medium includes: an additional information recording section formed on a recording track of a first data string; and a second data string including a mark of removing or reducing the reflective film. The modulation methods of the first and the second data strings are identical, and Lh(n)&#x3e;Lp(n) and Wh(n)&#x3e;(Wp(n)+Wp(n))/2 are satisfied, where a reference clock cycle is T, a data length is nT, a length and a width of the mark are Lh(n) and Wh(n), a length and a width of a base of the pit are Lp(n), and Wp(n), a length and a width of a top face of the pit is Lp(n) exceeding Lp(n), and Wp(n) exceeding Wp(n).

Optical disk read only memory

An optical information recording medium includes a read-only information recording portion, and a BCA (Burst Cutting Area) portion formed by laser marking. A reflective film on an information recording surface of the read-only information recording portion and a reflective film on the BCA portion are formed of the same material. The reflective film includes Ag as a main component, and at least one of Nd and Gd, and at least one of Sn and In as components; the reflective film including at least one of Nd and Gd of 0.1 atom % or more and 3.0 atom % or less in total and at least one of Sn and In of 3 atom % or more and 12 atom % or less in total. Recorded information is reproduced from the information recording surface of the read-only information recording portion and a BCA signal is reproduced from the BCA portion, using blue-violet laser reproducing light.

Optical information recording medium and method of marking BCA (burst cutting area) into the same

The invention relates to an Ag alloy reflective film for an optical information recording medium, including Ag as a main component, at least one kind of Nd, Gd, Y and Sm in a total amount of more than 0.1 atomic percent and not more than 3.0 atomic percent and at least one kind of W, Mo, V, Zr, Nb and Cr in a total amount of 3.0 to 10.0 atomic percent; an Ag alloy reflective film for an optical information recording medium, including Ag as a main component, at least one kind of Nd, Gd, Y and Sm in a total amount of more than 0.1 atomic percent and not more than 3.0 atomic percent and at least one kind of Ti and Ta in a total amount of 5.0 to 10.0 atomic percent; an optical information recording medium including the Ag alloy reflective film; and an Ag alloy sputtering target having a composition same as that of the Ag alloy reflective film.

Ag alloy reflective film for optical information recording medium, optical information recording medium and Ag alloy sputtering target for forming Ag alloy reflective film for optical information recording medium

Auxiliary digital data is sold and bought. A process for selling auxiliary digital data is performed with respect to a process for cancelling a limitation of use of the digital data. A process for buying the auxiliary digital data is performed. A process for receiving a selling request and a buying request is performed, and selling and buying transactions are concluded. The process of selling, the process of buying, and the process of selling and buying are each performed by transmitting and receiving data through a communication network.

Digital data selling and buying transaction system, auxiliary digital data selling and buying system, digital data selling and buying transaction method, auxiliary digital data selling and buying method, and digital data selling and buying transaction apparatus

In a manufacturing method of a magneto-optical recording medium formed by laminating a plurality of magnetic layers, there is provided a manufacturing method whereby at least two of the magnetic layers can be properly and individually formed by sputtering the same target means in the same vacuum vessel under different conditions at the time of a sputtering process in accordance with an element composition ratio and/or magnetic characteristics of each layer.

Magneto-optical recording medium and manufacturing method thereof

A method for manufacturing a magneto-optical recording medium in which reading of recorded information is performed through domain wall displacement in a reproduction layer is provided, in which magnetic separation of groove side-wall portions is performed more reliably; as a result a magneto-optical recording medium with satisfactory recording and reproduction characteristics can be provided. The method is to manufacture a magneto-optical recording medium in which on a substratehaving groovesat least a reproduction layer and a recording layer, each of which is formed of magnetic layers, are deposited and recorded information is reproduced through domain wall displacement in the reproduction layer; and the method includes a first annealing process in which, after depositing at least the reproduction layer and recording layer on the substrateon which are formed landsand grooves, only side-wall portionsbetween adjacent landsand groovesare irradiated with laser light L, and a second magnetization annealing process in which regions including adjacent side-wall portionsand lands between side-wall portionsare irradiated with laser light Lhaving a spot diameter greater than the spot diameter of the laser light in the first annealing process, while applying an external magnetic field H.

Growing community of inventors

Kanagawa, Japan

Tetsuhiro Sakamoto