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    • 82. 发明授权
    • Optical information recording medium
    • 光信息记录介质
    • US07482109B2
    • 2009-01-27
    • US10062912
    • 2002-01-31
    • Masaki KatohYuki NakamuraKatsuyuki Yamada
    • Masaki KatohYuki NakamuraKatsuyuki Yamada
    • G11B7/24
    • G11B7/243G11B7/006G11B7/126G11B7/2403G11B7/24067G11B7/2542G11B7/258G11B7/2585G11B2007/24308G11B2007/2431G11B2007/24314G11B2007/24316Y10S430/146
    • A phase change optical recording medium includes at least a supporting substrate and a recording layer essentially consisting of AgInSbTe alloy compositions implementing recording and readout steps utilizing changes in reflectivity. The recording medium is characterized by the relation v0≧0.7 vWH, where the critical relative velocity of phase change, v0, defined by the value of v, at which the differential coefficient, −dR(v)/dv, reaches a maximum, when the recording medium moves against an optical unit during the recording steps at a relative velocity, v, ranging from minimum and maximum relative velocities warranted for the recording medium, vWL and vWH, respectively. When the reflectivity is measured with varying erase power PE at the linear relative scanning velocity v0, the reflectivity of the recording layer as a function of erase power, R(PE), preferably has a minimum. The recording layer has an activation energy of deterioration equal to or greater than 1.6 eV, which is obtained by measuring asymmetry, A, and calculating according to the equations, k=dt/dA, and k=k0×exp(Ea/kBT). The recording medium is also characterized by activation energy of displacement of the boundary, ranging from 1.0 eV to 2.4 eV, which is obtained from the rate of decrease in the area, S, of the amorphous regions as recorded marks with time according to Arrhenius' equation.
    • 相变光学记录介质至少包括支撑基板和基本上由AgInSbTe合金组合物组成的记录层,其实现利用反射率变化的记录和读出步骤。 记录介质的特征在于v0> = 0.7vWH,其中相位变化的临界相对速度v0由v的值定义,其中微分系数-dR(v)/ dv达到最大值, 当记录介质在记录步骤期间以相对速度v移动时,记录介质分别从记录介质vWL和vWH所需的最小和最大相对速度范围内移动。 当以线性相对扫描速度v0的变化的擦除功率PE测量反射率时,作为擦除功率R(PE)的函数的记录层的反射率优选地具有最小值。 记录层具有等于或大于1.6eV的激活能量,其通过测量不对称性A而获得,并且根据等式k = dt / dA和k = k0xexp(Ea / kBT)进行计算。 该记录介质的特征还在于边界位移的活化能为1.0eV至2.4eV,其从非晶区域的减小速率S得到,随着时间的推移,Arrhenius' 方程。
    • 84. 发明申请
    • Method for controlling a multi-pulse record waveform at high velocity in a phase change optical medium
    • 用于在相变光学介质中高速控制多脉冲记录波形的方法
    • US20070065755A1
    • 2007-03-22
    • US11491240
    • 2006-07-24
    • Yuki Nakamura
    • Yuki Nakamura
    • G11B7/24
    • G11B7/0062G11B7/0045G11B7/126
    • In an optical recording method and apparatus of the present invention, a driving power is applied to a light source to control emission of a light beam to a recording layer of an optical storage medium, the driving power including a sequence of mark and space portions, each mark portion having a pulse width that corresponds to a multiple of a period T of a write clock. A multi-pulse waveform of each mark portion of the driving power includes a front-end portion, a multi-pulse portion and a tail-end portion, the front-end portion having a first pulse width t1 with a high-power write level Pw and starting from a middle-power erase level Pe, the multi-pulse portion including write pulses each having a second pulse width t2 with the write level Pw and a third pulse width t3 with a low-power base level Pb, the multi-pulse portion having a duty ratio z=t2/(t2+t3), and the tail-end portion having a fourth pulse width t4 with the base level Pb and ending at the erase level Pe. The waveform is controlled, when a linear velocity of rotation of the medium is set in a range from 5 m/s to 28 m/s, such that the first pulse width t1 ranges 0.1T to 1T and the fourth pulse width t4 ranges 0.2T to 1.3T.
    • 在本发明的光记录方法和装置中,向光源施加驱动功率以控制向光存储介质的记录层发射光束,驱动功率包括标记和空间部分的序列, 每个标记部分具有对应于写时钟的周期T的倍数的脉冲宽度。 驱动功率的每个标记部分的多脉冲波形包括前端部分,多脉冲部分和尾端部分,前端部分具有第一脉冲宽度t 1,具有大功率写入 电平Pw并且从中间功率擦除电平Pe开始,所述多脉冲部分包括具有写入电平Pw的第二脉冲宽度t 2和具有低功率基准电平Pb的第三脉冲宽度t 3的写入脉冲, 具有占空比z = t 2 /(t 2 + t 3)的多脉冲部分,并且尾端部分具有基极电平Pb并以擦除电平Pe结束的第四脉冲宽度t 4。 当介质的旋转速度设定在5m / s至28m / s的范围内时,波形被控制,使得第一脉冲宽度t 1的范围为0.1T至1T,第四脉冲宽度t 4 范围0.2T至1.3T。
    • 87. 发明申请
    • Optical information recording medium
    • 光信息记录介质
    • US20060204704A1
    • 2006-09-14
    • US11410853
    • 2006-04-26
    • Yuki NakamuraTohru YashiroTatsuo Mikami
    • Yuki NakamuraTohru YashiroTatsuo Mikami
    • B32B3/02
    • G11B7/246G11B7/2463G11B7/2467G11B7/2472G11B7/248G11B7/249G11B7/2531G11B7/2533G11B7/2534G11B7/2535G11B7/2578G11B7/259G11B2007/25706G11B2007/25708G11B2007/2571G11B2007/25711G11B2007/25713G11B2007/25715G11B2007/25716G11B2007/25718Y10T428/21
    • An optical information recording medium containing a first information substrate including a first substrate having a guide groove thereon, a first recording layer including a dye, overlying the first substrate and a first reflective layer being a semi-transmittance layer, overlying the first recording layer, a second information substrate comprising, a second substrate having a guide groove thereon, a second recording layer comprising a dye, overlying the second substrate, a second reflective layer being a semi-transmittance layer, located overlying the second recording layer and a light trasnmittance protective layer overlying the second reflective layer and a transparent intermediate layer. Further, the following relationships (1) and (2) are satisfied: (1) 0.3≦nd/λ≦0.7, wherein n represents refractive index in the complex refractive index n-ik of the light trasnmittance protective layer, d represents a thickness thereof, and λ is at least one of a recording wavelength and a playback wavelength, (2) k≦0.05, wherein k represents absorption index of the light trasnmittance protective layer of the complex refractive index n-ik.
    • 一种光学信息记录介质,包括第一信息基板,包括在其上具有引导槽的第一基板,覆盖在第一基板上的染料的第一记录层和覆盖在第一记录层上的半透射层的第一反射层, 第二信息基板,包括:第二基板,其上具有引导槽;第二记录层,包括覆盖在所述第二基板上的染料;第二反射层,是位于所述第二记录层上方的半透射层;以及光导纳保护 覆盖第二反射层的层和透明中间层。 此外,满足以下关系式(1)和(2):(1)0.3 <= nd /λ<= 0.7,其中n表示光导纳保护层的复折射率n-ik中的折射率,d表示 其厚度和λ是记录波长和重放波长中的至少一个,(2)k <= 0.05,其中k表示复合折射率n-ik的光导纳保护层的吸收指数。
    • 88. 发明授权
    • Optical information recording medium
    • 光信息记录介质
    • US07095706B2
    • 2006-08-22
    • US11082866
    • 2005-03-18
    • Yuki NakamuraTohru YashiroTatsuo Mikami
    • Yuki NakamuraTohru YashiroTatsuo Mikami
    • G11B7/24B32B3/02
    • G11B7/246G11B7/2463G11B7/2467G11B7/2472G11B7/248G11B7/249G11B7/2531G11B7/2533G11B7/2534G11B7/2535G11B7/2578G11B7/259G11B2007/25706G11B2007/25708G11B2007/2571G11B2007/25711G11B2007/25713G11B2007/25715G11B2007/25716G11B2007/25718Y10T428/21
    • An optical information recording medium containing a first information substrate including a first substrate having a guide groove thereon, a first recording layer including a dye, overlying the first substrate and a first reflective layer being a semi-transmittance layer, overlying the first recording layer, a second information substrate comprising, a second substrate having a guide groove thereon, a second recording layer comprising a dye, overlying the second substrate, a second reflective layer being a semi-transmittance layer, located overlying the second recording layer and a light transmittance protective layer overlying the second reflective layer and a transparent intermediate layer. Further, the following relationships (1) and (2) are satisfied: (1) 0.3≦nd/λ≦0.7, wherein n represents refractive index in the complex refractive index n-ik of the light transmittance protective layer, d represents a thickness thereof, and λ is at least one of a recording wavelength and a playback wavelength, (2) k≦0.05, wherein k represents absorption index of the light transmittance protective layer of the complex refractive index n-ik.
    • 一种光学信息记录介质,包括第一信息基板,包括在其上具有引导槽的第一基板,覆盖在第一基板上的染料的第一记录层和覆盖在第一记录层上的半透射层的第一反射层, 第二信息基板,包括:第二基板,其上具有引导槽;第二记录层,包括染料,覆盖在所述第二基板上;第二反射层,半透射层,位于所述第二记录层的上方;以及透光保护层 覆盖第二反射层的层和透明中间层。 此外,满足以下关系式(1)和(2):(1)0.3 <= nd /λ<= 0.7,其中n表示光透射保护层的复折射率n-ik中的折射率,d表示 其厚度和λ是记录波长和重放波长中的至少一个,(2)k <= 0.05,其中k表示复合折射率n-ik的透光率保护层的吸收指数。