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1. 发明专利

JP2003077182A Method and device for reducing contraction of clamp part of optical disk, and optical disk thereby obtained 有权
标题翻译：用于减少光盘夹部分合同的方法和装置以及获得的光盘
公开(公告)号：JP2003077182A
公开(公告)日：2003-03-14
申请号：JP2002234033
申请日：2002-08-09
申请人： Wea Mfg Inc , ウェアマニュファクチャリングインコーポレイティド
发明人： MYRTLE JAMES
IPC分类号： G11B7/26 , G11B7/24 , G11B23/00
CPC分类号： G11B7/24003 , G11B7/24 , G11B23/0035
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for reducing the contraction of the clamp part of an optical disk, wherein a distortion is reduced and efficient production is carried out.
SOLUTION: The improved optical disk has a substantially transparent substrate, and includes an optical data structure constituted of a pit and a land in the outside of the clamp area of a disk on its one surface. In the clamp area, a protruded part structure is provided to protrude from a first surface, and accordingly a thickness for a clamp is provided, which is thicker than the thickness of the other part of the disk. Only a part of the clamp area is covered with the protruded part, thereby ensuring a thickness equivalent to that of a disk having thick clamp area. To reduce distortion generated by the contraction of a material, the amount of a material used for forming the protruded part is set less than 5% of the amount of a material used for forming the other clamp area.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供减少光盘的夹紧部分的收缩的方法和装置，其中减小了变形并且执行了有效的生产。解决方案：改进的光盘具有基本上透明的基板，并且包括在其一个表面上的盘的夹紧区域的外部由凹坑和焊盘构成的光学数据结构。在夹紧区域中，设置有从第一表面突出的突出部分结构，因此提供了比盘的另一部分的厚度更厚的夹具的厚度。只有夹紧区域的一部分被突出部分覆盖，从而确保与具有较厚夹紧区域的盘的厚度相当的厚度。为了减少由材料收缩产生的变形，用于形成突出部分的材料的量被设定为用于形成另一个夹紧区域的材料的量的5％。

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