公开(公告)号：EP0386971A1

公开(公告)日：1990-09-12

申请号：EP90302296.0

申请日：1990-03-05

申请人： Hitachi Maxell Ltd.

发明人： Sugiyama, Toshinori ,  Kanazawa, Yasunori ,  Sonobe, Takeo ,  Tanaka, Yoshito ,  Fukutake, Sunao ,  Miura, Makoto

IPC分类号： G11B7/26 ,  G11B7/24

CPC分类号： G11B23/0035 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/26

摘要： According to a method of producing an optical disk, comprising the steps of providing a jig having a cylindrical portion and a center pin formed on said cylindrical portion coaxially therewith; providing a transparent substrate having a reference hole formed therein at its central portion and disposed coaxially with an imaginary center of beam-tracking tracks, on the substrate, constituted by preformed pits and projections which tracks are spaced at predetermined intervals radially outwardly of the reference hole; fitting said cylindrical portion of the jig into the reference hole in the transparent substrate; and inserting the center pin of said jig into a spindle hole, formed in a spindle hole-containing member, against movement relative to the spindle hole, and subsequently securing the spindle hole-containing member to a central portion of the transparent substrate while keeping the relative posi­tion thereof the spindle hole being smaller in diameter than the reference hole in the transparent substrate, concentricity of the reference hole and the spindle hole can be easily attained.

摘要翻译： 。根据在光盘制造方法，包括：提供具有一个圆柱形部分和形成在所述筒状部同轴那里与中心销的夹具的步骤的方法; 提供具有基准孔在其中央部形成于其中并与波束跟踪轨道的假想中心孔同轴设置，在基片上，通过预先形成的凹坑和凸起，所述凸起的轨道以预定的间隔的基准的间隔径向向外构成的透明基板 ; 所述夹具的成在透明基板的基准孔嵌合筒部; 和插入所述夹具的中心销插入一轴孔，孔中形成的主轴不能相对移动构件到主轴上，并且随后将主轴含孔构件固定到所述透明基板的中央部，同时保持含有空穴 其主轴孔的直径大于在所述透明基板的基准孔较小的相对位置，所述基准和主轴孔的孔同心，可以容易地实现。