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    • 6. 发明授权
    • Optical recording medium having a recording/reproducing area with a shaped region
    • 具有记录/再现区域的成形区域的光学记录介质
    • US06584067B2
    • 2003-06-24
    • US09796792
    • 2001-03-02
    • Noriaki OshimaHideki OonoKeiichiro Nishizawa
    • Noriaki OshimaHideki OonoKeiichiro Nishizawa
    • G11B582
    • B82Y10/00G11B7/007G11B7/121G11B7/122G11B7/24097G11B7/26G11B23/0035
    • An optical recording medium wherein a land and a groove are formed in both front and rear surfaces of a circular disk-like substrate respectively, at least a recording layer and a dielectric layer are formed on the surfaces of the substrate, and a hub is provided in only one of the surfaces and recording/reproducing are conducted by using a flying optical head, the optical recording medium being characterized in that in a state that the medium is supported by the hub so that the hub-attached surface directs downward, and in a region from the innermost periphery to L/3, where L is a distance from the innermost periphery to the outermost periphery of a recording/reproducing area, the center of curvature in a radial direction of that region exists at an opposite side with respect to the hub-attached surface of the optical recording medium, whereby the optical recording medium of high reliability wherein the distance between the flying optical head floating above the surface of the recording medium and the surface of the recording medium can be kept constant; uniform recording/reproducing signals can be obtained, and head crushing seldom occurs.
    • 一种光盘记录介质,其中在圆盘状基板的前表面和后表面分别形成有焊盘和凹槽,至少记录层和电介质层形成在基板的表面上,并且设置有集线器 在只有一个表面和记录/再现通过使用飞行光学头进行的情况下,光学记录介质的特征在于,在介质由轮毂支撑使得轮毂附接表面向下引导的状态下 从最内周到L / 3的区域,其中L是从记录/再现区域的最内周到最外周的距离,该区域的径向方向上的曲率中心相对于 光记录介质的轮毂安装表面,由此可靠的光学记录介质,其中浮动光学头在记录表面之上的距离 并且记录介质的表面可以保持恒定; 可以获得均匀的记录/再现信号,并且很少发生头部破碎。
    • 7. 发明授权
    • Optical recording medium
    • 光记录介质
    • US07050385B2
    • 2006-05-23
    • US09777686
    • 2001-02-07
    • Noriaki OshimaHideki OonoTakashi TaniguchiKeiichiro Nishizawa
    • Noriaki OshimaHideki OonoTakashi TaniguchiKeiichiro Nishizawa
    • G11B7/24
    • G11B11/10584G11B7/007G11B7/122G11B7/24G11B7/24085G11B11/10578G11B11/1058G11B11/10586
    • An optical recording medium comprising at least a land and a groove where information-recording/reproducing is carried out by a flying type optical head, The optical recording medium keeps the flying height of the flying optical head constant in the entire region of the recording/reproducing area, and is provided with at least one characteristic among the following characteristics: RP which is dependent on land and groove parameters and the flying height satisfies the relation of H>Rp 0.1 H; centerline mean roughness Ra is in the range of 0.2 nm Ra 2.0 nm, and the layer thickness of a liquid lubricant layer satisfies the relation of t Ra; the relation of ΔRp≦λ/16 NA which is dependent on the effective numerical aperature, laser wavelength and surface parameters is satisfied where all parameters in the formula are defined in the specification; and the height of a header area is different from the height of a land portion.
    • 至少包括通过飞行型光学头执行信息记录/再现的凹槽和凹槽的光学记录介质。光学记录介质保持飞行光学头的飞行高度在记录/ 并且具有以下特征中的至少一个特征:取决于陆地和槽参数的RP和飞行高度满足H> Rp 0.1H的关系; 中心线平均粗糙度Ra在0.2nm Ra 2.0nm的范围内,液体润滑剂层的层厚度满足t Ra的关系; 满足公式中所有参数在规范中定义的ΔRp<=λ/ 16 NA的关系,其取决于有效数值,激光波长和表面参数; 并且标题区域的高度与陆地部分的高度不同。