Samsung Electronics Co., Ltd.

National Institute of Advanced Industrial Science and Technology

Samsung Japan Corporation

Tdk Corporation

Joo-Ho Kim

In-oh Hwang

Junji Tominaga

Hyun-ki Kim

Du-seop Yoon

Kiu-hae Jung

Masashi Kuwahara

Nak-hyun Kim

Kyung-geun Lee

In-sik Park

Chong-sam Chung

Takashi Kikukawa

Hyun-Soo Park

Hyun-jung Kim

Narutoshi Fukuzawa

Yong-ho Kim

Chang-min Park

Jin-Kyung Lee

Tatsuhiro Kobayashi

Jae-Cheol Bae

Myong-do Ro

Jin Ra

Dong-Hyun Sohn

In-Oh Hwang

Chong-Sam Chung

Hong-Suk Kim

Takayuki Sima

Junil Tominaga

Du-seep Yoon

Jong-Hyun Ryu

Moon-Il Jung

Hyun-Min Song

Kiu-Hae 243-601 Ssangyong Apt Jung

Jin-Kyung 936-702 Byuckjeokgol 9-Danji Apt Lee

Hyun-Ki 216-702 Hyundai Town Apt Kim

A pattern forming materials includes a thermal sensitive material layer formed on a target substrate, a first light-to-heat converting layer formed between the thermal sensitive material layer and the target substrate, and a second light-to-heat converting layer formed on a surface of the thermal sensitive material layer opposite to the first light-to-heat converting layer, the thermal sensitive material layer being interposed between the first and second light-to-heat converting layers. A higher aspect ratio fine pattern can be formed in the thermal sensitive material layer made of photoresist using heat generated in the first and second light-to-heat converting layers formed on both surfaces of the thermal sensitive material layer.

Pattern forming materials and pattern formation method using the materials

A method of determining an optimum reproduction condition of a first mark recorded on an optical recording medium that is smaller than a resolution of a pickup to reproduce the first mark. The method includes obtaining an optimum reproduction condition of a second mark having a length which closely approximates the resolution of the pickup, and determining the optimum reproduction condition of the first mark using the obtained optimum reproduction condition of the second mark.

Method and apparatus to determine an optimum reproducing condition on an optical recording medium

A data reproducing method reproducing data recorded in a super resolution information storage medium in a form of marks having magnitudes less than a resolving power of an incident light beam, and an apparatus thereof. The data reproducing method includes irradiating a first beam having a resolving power causing a super resolution phenomenon and a second beam having a resolving power not causing a super resolution phenomenon into different places on the information storage medium, detecting a first reproduction signal based on the first beam and a second reproduction signal based on the second beam, and compensating for and calculating a temporal delay between the first reproduction signal and the second reproduction signal. Therefore, a signal reflected from a peripheral area of a reproduction beam spot other than a super resolution area can be excluded, thereby improving reproduction signal characteristics.

Method and apparatus for reproducing data of super resolution information storage medium

A high density recording medium with a super-resolution near-field structure including a mask layer comprising high melting point metal oxide or silicon oxide. A high density recording medium with a super-resolution near-field structure includes a sequential stack of a second dielectric layer, a recording layer, a protective layer, a mask layer, a first dielectric layer, and a polycarbonate layer, wherein the mask layer comprises high melting point metal oxide or silicon oxide to generate a near field by optically or thermally inducing physical changes in the crystalline structure and optical properties of the high melting point metal oxide or silicon oxide.

High density recording medium with super-resolution near-field structure manufactured using high-melting point metal oxide or silicon oxide mask layer

A simple-structured recording medium without a mask layer and information recording and reproducing methods, which resolve thermal stability related problems arising during reproduction, the recording medium including a high melting point recording layer between first and second dielectric layers. The method of recording information on the recording medium involves irradiating a laser beam onto the recording medium to induce reaction and diffusion in the high melting point recording layer and the first and second dielectric layers. The method of reproducing information recorded on such a super-resolution near-field recording medium by the above method involves generating plasmon using crystalline particles of the high melting point recording layer and the first and second dielectric layers as a scatter source to reproduce information regardless of a diffraction limit of a laser used.

Recording medium having high melting point recording layer, information recording method thereof, and information reproducing apparatus and method therefor

A super resolution information storage medium capable of reproducing information recorded thereon as a mark with a size less than the resolution limit of an incident light beam, includes marks of varying sizes recorded thereon, excluding marks with a size in the vicinity of the resolution limit, where the resolution limit depends on the wavelength of a light source irradiating light on the information storage medium and the numerical aperture of an object lens focusing the light irradiated from the light source on the information storage medium. By adjusting the size of or excluding a mark with a size in the vicinity of the limit of the resolution that has a low C/N ratio, the C/N ratio is improved and the performance of super resolution information reproduction is improved such that high density and high capacity information storage medium can be implemented.

Super resolution information storage medium and method of recording data thereon

A method of manufacturing a compound semiconductor includes the steps of forming a layered structure of dielectric layers including oxygen or sulfur, and an inter layer formed between the dielectric layers, including rare earth transition metal that is highly reactive to oxygen and sulfur, and heating the layered structure. As a result of the chemical reaction and diffusion of elements, one can change a heated portion of the layered structure to a semiconductor or an insulator, depending on the temperature to which the portion is heated.

Compound semiconductor formed from a heated portion of a layered structure including rare earth transition metal

A method of and an apparatus for generating a block-based low density parity check (LDPC) matrix, where calculation of an inverse matrix is not necessary and back-substitution is possible over the entire matrix area, and a recording medium having recorded thereon code for implementing the method. An area of the LDPC matrix is vertically divided based on respective lengths of first and second parity bit vectors and, a block-based matrix is generated such that a double diagonal matrix is arranged in an upper portion of an area corresponding to the second parity bit vector among areas into which the LDPC matrix is vertically divided., The area of the LDPC matrix is horizontally divided based on a position of the double diagonal matrix, and block-based matrices are generated in the divided areas of the LDPC matrix, to satisfy a condition that column weights (Wc) are uniform.

Method and apparatus for generating block-based low-density parity check matrix and recording medium having recorded thereon code for implementing the method

A super-resolution information storage medium having recording marks or pits that are smaller than the resolution limit of a beam incident from an information recording and/or reproducing apparatus, and the information recording and/or reproducing apparatus. The information storage medium includes a substrate and at least one super-resolution reproduction layer containing a super-resolution material and a high melting point material with a melting point higher than that of the super-resolution material formed on the substrate. The high melting point material suppresses movement of the super-resolution material in a melted phase so as to prevent signal degradation caused by repeated reproduction.

Information storage medium having super resolution structure and apparatus for recording to and/or reproducing from the same

A multi-layer structure whose volume changes when a temperature exceeds a predetermined threshold value, a microscopic structure drawing method that involves emitting a laser beam onto the multi-layer structure to create a temperature distribution within a beam spot and performing microscopic recording on a portion of the beam spot having a temperature higher than the threshold value, an optical disc master, and a mastering method using the same, where the multi-layer structure includes a substrate and a transformation layer formed on the substrate, wherein a volume of a portion of the transformation layer irradiated by a laser beam changes when the temperature of the portion exceeds a predetermined temperature. The microscopic structure drawing method includes emitting the laser beam onto a predetermined region of the transformation layer and heating the region of the transformation layer irradiated by the laser beam beyond a predetermined temperature so that the heated region can undergo a volume change.

Multi-layer structure and method of drawing microscopic structure therein, optical disc master and method of fabricating the same using the multi-layer structure, and optical disc manufactured using the optical disc master

A method of generating codewords that conform to a run length limited (RLL) constraint represented by (d, k, a, b), where d is a minimum run length of a codeword, k is a maximum run length of the codeword, a is a length of source data, and b is a length of the codeword. The method includes generating codewords conforming to the RLL(d, k) constraint, and removing codewords in which a relatively long T and a relatively short T are placed adjacent to each other from the generated codewords.

Method of code generation, and method and apparatus for code modulation

A super resolution information storage medium includes: a substrate; a first super resolution layer which is formed over the substrate; a second super resolution layer which is formed over the first super resolution layer; and an insertion layer which is disposed between the first and second super resolution layers.

Super resolution information storage medium

An information storage medium reduces low frequency noise, and an apparatus records and/or reproduces information thereon. The information storage medium includes a substrate; a recording layer formed on the substrate and including at least two materials in which the materials chemically react with each other due to an incident beam thereon having a write power and form a recording mark; and a super resolution reproduction layer formed on and/or under the recording layer and having a property in which optical characteristics of a partial area of a spot due to the incident beam are changed. The apparatus to record and/or reproduce information on the information storage medium includes a pickup unit having a light source, an objective lens to form a beam spot on the information storage medium, and a photodetector; a signal processor; and a controller.

Information storage medium and apparatus for recording/reproducing information thereon

A read-only recording medium for achieving a carrier-to-noise ratio (CNR) using a super-resolution near-field structure (Super-RENS) on which information has been prerecorded includes a substrate having the information recorded on its surface, a reflective layer formed from a phase change material on the substrate, a first dielectric layer formed on the reflective layer, and a mask layer formed from metal oxide or nanoparticles on the first dielectric layer.

Recording medium having super-resolution near-field structure and method and apparatus for reproducing the same

A high density readable only optical disc includes a substrate having pits with different lengths in accordance with unit information, wherein a depth of the pit increases as the pit length increases; and a mask layer that includes a metal oxide, or a mixture of fine metal particles and a dielectric material. The high density readable only optical disc may be used to read pits not greater than a reading resolution limit and to obtain an optimal CNR since a pit depth is varied depending on a pit length. Also, a method of the high density readable only optical disc may be used to prepare a high density readable only optical disc having an optimal pit depth in accordance with a pit length.

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Yongin-si, South Korea

Joo-Ho Kim