摘要:
A recording method suitable for high-density recording is provided to increase the reproduction quality. An optical information recording method is for recording information on an optical recording medium by irradiation of a write pulse of a laser beam to perform reproduction in a production system using a PRML detection scheme. The method includes recording a recording mark by a single write pulse, when the total length of the recording mark to be recorded and a space adjacent to the recording mark is less than a diameter of an effective reproduction spot, being 0.82×(λ/NA), where λ is a wavelength of a reproduction laser beam and NA is a numerical aperture.
摘要翻译:提供适用于高密度记录的记录方法以提高再现质量。 一种光学信息记录方法,用于通过照射激光束的写入脉冲在光学记录介质上记录信息,以便在使用PRML检测方案的生产系统中进行再现。 该方法包括:当要记录的记录标记的总长度和与记录标记相邻的空间的总长度小于有效再生斑点的直径时,通过单个写入脉冲记录记录标记为0.82×(λ/ NA ),其中λ是再现激光束的波长,NA是数值孔径。
摘要:
A recording method suitable for high-density recording is provided. When information is recorded on an optical recording medium with irradiation of a write pulse of a laser beam, a length corresponding to 7 T is set to be equal to or less than the spot diameter λ/NA of the laser beam where T is one recording clock cycle, λ is a wavelength of the laser beam, and NA is a numerical aperture of the objective lens, and a specified mark with a length corresponding to 3 T or more is recorded by a single write pulse.
摘要翻译:提供适用于高密度记录的记录方法。 当通过激光的写入脉冲的照射将信息记录在光学记录介质上时,对应于7T的长度被设定为等于或小于其中T是一个记录的激光束的光斑直径λ/ NA 时钟周期,λ是激光束的波长,NA是物镜的数值孔径,并且通过单个写入脉冲记录长度对应于3T以上的指定标记。
摘要:
A recording method suitable for high-density recording is provided to increase the reproduction quality. An optical information recording method is for recording information on an optical recording medium by irradiation of a write pulse of a laser beam to perform reproduction in a production system using a PRML detection scheme. The method includes recording a recording mark by a single write pulse, when the total length of the recording mark to be recorded and a space adjacent to the recording mark is less than a diameter of an effective reproduction spot, being 0.82×(λ/NA), where λ is a wavelength of a reproduction laser beam and NA is a numerical aperture.
摘要翻译:提供适用于高密度记录的记录方法以提高再现质量。 一种光学信息记录方法,用于通过照射激光束的写入脉冲在光学记录介质上记录信息,以便在使用PRML检测方案的生产系统中进行再现。 该方法包括:当要记录的记录标记的总长度与记录标记相邻的空间小于有效再现点的直径时,通过单个写入脉冲记录记录标记为0.82×(λ/ NA ),其中λ是再现激光束的波长,NA是数值孔径。
摘要:
A recording method suitable for high-density recording is provided. When information is recorded on an optical recording medium with irradiation of a write pulse of a laser beam, a length corresponding to 7 T is set to be equal to or less than the spot diameter λ/NA of the laser beam where T is one recording clock cycle, λ is a wavelength of the laser beam, and NA is a numerical aperture of the objective lens, and a specified mark with a length corresponding to 3 T or more is recorded by a single write pulse.
摘要翻译:提供适用于高密度记录的记录方法。 当通过激光的写入脉冲的照射将信息记录在光学记录介质上时,对应于7T的长度被设置为等于或小于T是一个记录的激光束的光斑直径λ/ NA 时钟周期,λ是激光束的波长,NA是物镜的数值孔径,并且通过单个写脉冲记录长度对应于3T以上的指定标记。
摘要:
A method is provided to enable efficient optimization of write pulse waveforms using a trial writing region. To record information on an optical recording medium using a laser beam, the method includes: recording a specific pattern of multiple record marks on the trial writing region of the optical recording medium; decoding a read signal from the specific pattern using a PRML detection method; and tuning a write pulse waveform for forming the record marks based on the quality of decoded data determined by the PRML detection method.
摘要:
A battery pack is disclosed. The battery pack includes one or more battery assemblies and a circuit board connected to the battery assemblies. The battery assembly includes first and second battery cells having the predetermined surfaces overlaid on each other. The first and second battery cells each have battery elements accommodated in a container thereof, and cathode terminals and anode terminals are provided at a same height as the predetermined surfaces at a same side. The cathode terminal and anode terminal of the first battery cell are adjacent respectively to the cathode terminal and anode terminal of the second battery cell.
摘要:
An optical recording medium which includes three or more information layers and has a higher stack density of information layers than before in the direction of thickness while reducing crosstalk during reproduction, and a method for reading the optical recording medium are provided. The optical recording medium has a three-layer structure which includes a substrate, a first information layer, a first spacer layer, a second information layer, a second spacer layer, a third information layer, and a cover layer thinner than the substrate, with these layers being stacked in that order over the substrate, wherein the following Equation (I) is satisfied: (R2×R3×R2)/R1≦0.0032 Equation (I) where R1 is the reflectivity of the first information layer, R2 is the reflectivity of the second information layer, and R3 is the reflectivity of the third information layer, and the first spacer layer and the second spacer layer are equal to each other in thickness.
摘要:
At least one ion 6 selected from Cr, Al, Nb and Mo is locally implanted into a thin film 4 containing, as main components, at least one of Fe and Co and at least one of Pd and Pt and a boron ion 20 is then implanted into a whole surface of the thin film subjected to the implantation, and a heat treatment is thereafter carried out, and a portion 7 into which at least one ion 6 selected from Cr, Al, Nb and Mo and the boron ion 20 are implanted becomes a portion 9 having a small coercive force and a portion 8 into which only the boron ion 20 is implanted becomes a portion 10 having a large coercive force.
摘要:
A method of fabricating a magnetic head device comprising a slider having a magnetic head element, a suspension structure made of a thin resilient material and having one end supporting the slider and the other end to be attached to another member, and a head IC chip. The head IC chip is mounted on the suspension structure so as to face a magnetic recording disc and at a position spaced from the slider-supporting one end of the suspension structure by an intervening portion of the suspension structure. The position is selected so that the intervening portion is effective to suppress a temperature increase in the head IC chip due to at least thermal conduction through the intervening portion.
摘要:
A magnetic disk medium of the invention comprises a disk form of substrate, a multiplicity of unit minuscule recording areas formed of a magnetic material on the substrate to magnetically record information thereon and located concentrically or spirally at an interval in a peripheral or radial direction, and a non-recording area provided on the substrate and formed of a non-magnetic material that is embedded between the unit minuscule recording areas. Each unit minuscule recording area is in a form having a major axis and a minor axis, wherein the direction of the major axis is aligned with the radial direction of the substrate.