Patent application number | Description | Published |
20090017251 | MULTI-INFORMATION-LAYER RECORDING MEDIUM AND MANUFACTURING PROCESS - In forming a space layer of a multi-formation-layer recording medium, there are provided a medium having a high precision in a thickness of the space layer and its manufacturing process. In the multi-formation-layer recording medium wherein at least two pairs of an information recording layer and a translucency spacer are layered on a substrate having physical patterns composed of an optical spot groove and/or pits on the surface, an average thickness of the translucency spacers in an information zone is 15 μm or less, and a difference in spacer thickness between a minimum value and a maximum value is 2 μm or less. | 01-15-2009 |
20110085238 | OPTICAL ELEMENT AND OPTICAL APPARATUS - The present invention provides a small and inexpensive optical element that integrates a reflecting mirror and a wave plate function. A reflecting wave plate is configured by arranging a periodic metal comb-like structure whose pitch is equal to or below a wavelength and a mirror structure with a distance equal to or below a coherence length. | 04-14-2011 |
20110235408 | SEMICONDUCTOR MEMORY DEVICE - For decreasing a recording current and suppressing a cross erase simultaneously, a three-dimensional phase-change memory for attaining higher sensitivity and higher reliability by the provision of a chalcogenide type interface layer is provided, in which an electric resistivity, a thermal conductivity, and a melting point of the material of the interface layer are selected appropriately, thereby improving the current concentration to the phase-change material and thermal and material insulation property with Si channel upon writing. | 09-29-2011 |
20120273742 | SEMICONDUCTOR STORAGE DEVICE - An intermediate layer including at least one of elements constituting a phase change material and silicon is arranged between a recording layer composed of the phase change material and an n | 11-01-2012 |
20130242391 | OPTICAL DEVICE AND METHOD FOR MANUFACTURING SAME - In a first face and a second face of an irregular configuration portion configuring a wire grid structure, surface roughness of the first face farther from an input side of a light (electromagnetic wave) is made rougher than the surface roughness of the second face closer to the input side of the light (electromagnetic wave). With this configuration, according to this embodiment, since a reflection polarization element can be realized, there can be provided an optical device that is excellent in tolerance to heat and light, and contributes to a reduction in the costs. | 09-19-2013 |
Patent application number | Description | Published |
20080205236 | OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL INFORMATION REPRODUCING METHOD - A disc structure for making an inverted optical response through a super-resolution process using a recorded mark portion and a space portion, which is realized to amplify a signal amplitude and solve a conventional problem that a conventional super-resolution technique can obtain only small signals, since the super-resolution area is reduced to realize high density recording of data. | 08-28-2008 |
20080285431 | Optical disk medium and tracking method - A super-resolution material is formed in only a data pit, in a low temperature state of the super-resolution material, reflectivity of each of a pit portion and a space portion and an optical phase difference therebetween are set to be sufficiently small, in a high temperature state, and at least the optical phase difference between the pit and the space is set to be larger than the aforementioned value in an absolute value. Accordingly, by conducting irradiation with an appropriate read power by which substantially only one data track width can be heated to a high temperature state, a good push-pull signal can be obtained even with a track pitch being less than a diffraction limit. At the same time, by an optical device having functions such as a switching means with a DPP type, an offset correcting means of the push-pull signal due to lens shift, a shaping means of the push-pull signal, a learning means of read power, and the like, there is provided an optical disk device that corresponds to the optical disk medium of the present invention and achieves an increase in capacity. | 11-20-2008 |
20090106627 | Digital information reproduction method - An optical disc using super-resolution effects that achieves higher-density recording exceeding the optical resolution suffers from the signal-quality degradation caused by the normal resolution component included in the reproduction signal. To address this problem, a data reproduction method is provided. In the method, characteristic error patterns are identified and parity check codes in conformity with run-length limited coding are used to carry out efficient and reliable error correction. Error patterns caused by the normal resolution crosstalk are localized in the leading edges of a mark following a long space and in the trailing edges of a long mark. Whether an error exists in the data is determined by use of the parity check codes. When an error occurs, a pattern in which an error is most likely to occur is selected from the above-mentioned patterns by taking account of the edge shift direction, and then the error therein is corrected. | 04-23-2009 |
Patent application number | Description | Published |
20080212454 | Information recording method and apparatus with suppressed mark edge jitters - Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion. | 09-04-2008 |
20080310270 | Information recording method and apparatus with suppressed mark edge jitters - Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion. | 12-18-2008 |
20090034393 | Information recording method and apparatus with suppressed mark edge jitters - Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion. | 02-05-2009 |
20090040901 | Information recording method and apparatus with suppressed mark edge jitters - Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion. | 02-12-2009 |