摘要:
An optical recording medium containing a substrate and a recording layer over the substrate, wherein the recording layer primarily contains Bi and O, and further contains B and at least one element X selected from Ge, Li, Sn, Cu, Fe, Pd, Zn, Mg, Nd, Mn and Ni, and a sputtering target containing Bi, B and at least one element X selected from Ge, Li, Sn, Cu, Fe, Pd, Zn, Mg, Nd, Mn and Ni.
摘要:
A power determining method is disclosed for determining the light emitting power of a light source upon recording information on an optical disk having plural rewritable recording layers, the method involving obtaining an optimum erasing power with respect to an optimum recording power by recording test data on the optical disk.
摘要:
A method of recording information using a laser on a multilayer optical disk having a plurality of recording layers is provided. The plurality of recording layers include a first recording layer and a second recording layer adjacent the first recording layer. The first recording layer is provided with a first test writing area to be used for calibration of write power, and the second recording layer is provided with a second test writing area to be used for calibration of write power. The disk is arranged so that a first region of the first test writing area is superposed with a second region of the second test writing area when considered in the direction in which the laser is arranged to irradiate. The method comprises, if the second region of the second test writing area is unrecorded, recording data in the second region of the second test writing area, thereby converting the second region of the second test writing area into a recorded state; and once the second region of the second test writing area has been converted into a recorded state, performing test writing in the first region of the first test writing area.
摘要:
To provide a dual-layer recordable optical recording medium, including: a first information layer; intermediate layer disposed over the first information layer; and second information layer disposed over the intermediate layer, the first information layer, intermediate layer, and second information layer being sequentially deposited from a laser irradiation side, wherein the first information layer comprises, from the laser irradiation side, at least a thin film containing Bi as a main ingredient, dielectric layer, reflective layer and thermal diffusion layer, and the second information layer comprises, from the laser irradiation side, at least a thin film containing Bi as a main ingredient, dielectric layer and reflective layer, and wherein the ratio of the thickness of the dielectric layer of the second information layer (t2) to the thickness of the dielectric layer of the first information layer (t1), t2/t1, is in a range of 0.7 to 1.5 or 4.5 to 6.0.
摘要:
A dual-layer structure phase-change type optical recording medium includes a substrate (1), a reflective layer (2), a first protective layer (3), a first recording layer (4), a second protective layer (5), a resin intermediate layer (6), a third protective layer (7), a heat release layer (8) made of Cu or a Cu alloy, a fourth protective layer (9), a second recording layer (10), a fifth protective layer (11) and a cover substrate (12). A product of a reflectance of a high-reflection part and a modulation after recording is a value equal to or higher than a lower limit value for reproduction.
摘要:
An object of the present invention is to provide an optical recording medium which exhibits high storage reliability in high-temperature/high-humidity conditions, stable performance at high temperatures, appropriate mechanical properties and high productivity and is capable of reproducing and recording at high speeds. It is an optical recording medium containing a lower protective layer, an optical recording layer, an upper protective layer and an optical reflective layer which contains 98% by weight or more of Ag that are formed on the substrate, the thickness of the optical recording layer is 8 nm to 14 nm and the thickness of the upper protective layer is 4 nm to 24 nm, the upper protective layer contains at least one of zinc oxide, indium oxide, tin oxide, niobium oxide, silicon nitride, aluminum nitride and SiOx (1.6≦x≦1.9) and less than 0.1% by weight of at least any one of sulfur and chlorine, and the upper protective layer is amorphous after recording or rewriting.
摘要翻译:本发明的目的是提供一种在高温/高湿条件下具有高储存可靠性,高温下性能稳定,机械性能好,生产率高,并且能够高速再现和记录的光记录介质 。 光记录层的厚度是含有下保护层,光记录层,上保护层和含有98重量%以上的Ag的光反射层的光记录介质, 为8nm〜14nm,上保护层的厚度为4nm〜24nm,上保护层含有氧化锌,氧化铟,氧化锡,氧化铌,氮化硅,氮化铝和SiO x( 1.6 <= x <= 1.9)和小于0.1重量%的硫和氯中的至少一种,并且上保护层在记录或重写之后是非晶的。
摘要:
There is provided a method and a device for recording optical data able to improve recording power setting during recording by means of PWM with a small number of pulses. During the test recording, using a period of a recording channel clock Tw as the minimum unit, marks having different mark lengths of n1·Tw and n2·Tw (n1
摘要:
A power determining method is disclosed for determining the light emitting power of a light source upon recording information on an optical disk having plural rewritable recording layers, the method involving obtaining an optimum erasing power with respect to an optimum recording power by recording test data on the optical disk.
摘要:
A recording method including: recording on a write-once-read-many optical medium capable of recording and reproducing with a blue laser by CAV, ZCLV, or PCAV, wherein a laser emission pattern including a recording pulse comprises two or more different levels of recording power, and a laser emission time standardized by the laser emission pattern and reference clock is fixed regardless of a recording linear velocity.
摘要:
A method of recording and reproducing information in a phase-change optical recording medium by irradiation of an electromagnetic wave for recording, reproducing and/or rewriting information is proposed, wherein when information is recorded in the phase-change optical recording medium by modulating an input signal and conducting pulse width modulation recording, a recording pulse string for recording and rewriting is a continuous electromagnetic wave, and a recording pulse string for recording and rewriting, after the modulation of the input signal, is an electromagnetic wave pulse string having a front-pulse portion fp, a multi-pulse portion mp with a total pulse duration period T and a duty ratio y, and an off-pulse portion op, wherein the duty ratio y is decreased as a recording linear velocity for the phase-change optical recording medium is increased, whereby multi-speed recording or CAV (constant angular velocity) recording is carried out. An information recording and reproducing apparatus, using the above method, is also proposed.