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    • 7. 发明授权
    • Optical recording medium
    • 光记录介质
    • US6128271A
    • 2000-10-03
    • US175536
    • 1998-10-20
    • Minemasa Ohta
    • Minemasa Ohta
    • G11B7/24G11B7/007G11B7/013
    • G11B7/24085G11B7/24079
    • An optical recording medium comprises a substrate layer formed with a plurality of grooves having a pitch of 0.7-0.9 .mu.m, further with a plurality of prepits located between the grooves and separated from each other at a predetermined interval; a recording layer formed on the substrate layer. The optical recording medium is adapted for recording and reproducing information by directing a laser beam (having a wavelength of 600-700 nm) through an objective lens (having an numerical aperture of 0.55-0.70), further through the substrate layer so as to converge the beam on the recording layer. In particular, the plurality of grooves are different from the plurality of prepits in depth and/or width.
    • 光学记录介质包括:基底层,其形成有间距为0.7〜0.9μm的多个凹槽,并且还具有位于凹槽之间的多个预凹坑并以预定的间隔相互分离; 形成在基板层上的记录层。 光学记录介质适于通过将激光束(具有600-700nm的波长)通过物镜(具有数值孔径为0.55-0.70)进一步通过基底层进行记录和再现,以便会聚 光束在记录层上。 特别地,多个凹槽在深度和/或宽度上与多个预凹坑不同。
    • 10. 发明授权
    • Method for manufacturing a master disc for optical discs
    • 制造光盘母盘的方法
    • US5843626A
    • 1998-12-01
    • US632911
    • 1996-04-16
    • Minemasa OhtaHiroyuki OhiraNobuki YamaokaYutaka Murakami
    • Minemasa OhtaHiroyuki OhiraNobuki YamaokaYutaka Murakami
    • G11B7/26G11B5/23
    • G11B7/261G11B7/263Y10S430/146
    • In a method for manufacturing a master disc for optical discs, patterns to be displayed on the disc are classified into a main object and a background. The background is commonly assigned as the background pattern for glittering rainbow colors by diffracted light reflected from dummy pits of diffraction gratings or a hologram. The main object is individually assigned as the main object pattern of a diffused reflection portion or mirror surface. The manufacturing method comprises one group of steps for forming the common background pattern and the other group of steps for forming the individual main object pattern in the common background pattern. A development substrate for the master disc is formed by using a mask disc in a first light-exposure of a photoresist layer thereof and by using a displaying-pattern mask in a first light-exposure of the photoresist layer. The individual main object pattern is drawn in the common background pattern of the master disc by using a laser-marking or an etching. The mask disc and displaying-pattern mask can be used repeatedly as families for the background and main object patterns so as to facilitate the replication of the optical discs.
    • 在用于制造用于光盘的母盘的方法中,要在盘上显示的图案被分类为主要对象和背景。 背景通常由衍射光栅或全息图的虚拟凹坑衍射的衍射光指定为闪烁的彩虹色的背景图案。 主要物体被单独地分配为扩散反射部分或镜面的主要对象图案。 该制造方法包括用于形成公共背景图案的一组步骤和用于在公共背景图案中形成单独主要对象图案的另一组步骤。 通过在其光致抗蚀剂层的第一次曝光中使用掩模盘并且在光致抗蚀剂层的第一次曝光中使用显示图案掩模来形成用于母盘的显影衬底。 通过使用激光标记或蚀刻将单个主要对象图案绘制在母盘的公共背景图案中。 掩模盘和显示图案掩模可以重复地用作背景和主要对象图案的系列,以便于光盘的复制。