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    • 1. 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。
    • 2. 发明授权
    • Optical disc having indication portion
    • 具有指示部的光盘
    • US5675570A
    • 1997-10-07
    • US575081
    • 1995-12-19
    • Hiroyuki OhiraNobuki YamaokaYutaka Murakami
    • Hiroyuki OhiraNobuki YamaokaYutaka Murakami
    • G11B7/24G11B7/26G11B23/40G11B3/70
    • G11B23/40G11B7/24G11B7/26
    • An optical disc is provided with: a disc substrate of light transmissive type having an information record surface including an information recorded region, where pits or grooves carrying an information signal are coaxially or spirally formed, and an information not-recorded region, where the pits or grooves carrying the information signal are not formed; a light reflective layer wholly disposed on the information record surface in the information recorded region, and partially disposed on the information record surface in the information not-recorded region such that an indication pattern is formed of the partially disposed light reflective layer on the information record surface in the information not-recorded region; and a protection layer disposed on the light reflective layer and a portion of the information record surface in the information not-recorded region where the light reflective layer is not disposed.
    • 光盘设置有:具有包括信息记录区域的信息记录表面的透光型光盘基板,其中携带信息信号的凹坑或凹槽同轴或螺旋地形成,以及信息未记录区域,其中凹坑 或者不形成承载信息信号的槽; 信息记录区域中完全设置在信息记录表面上的光反射层,并且部分地设置在信息未记录区域的信息记录表面上,使得指示图案由信息记录上的部分设置的光反射层形成 信息未记录区域的表面; 以及设置在光反射层上的保护层和不设置光反射层的信息未记录区域中的信息记录表面的一部分。