发明申请
- 专利标题： DISC MASTER, DISC MASTER MANUFACTURING METHOD, STAMPER, DISC SUBSTRATE, OPTICAL DISC, AND OPTICAL DISC MANUFACTURING METHOD
- 专利标题（中）： 光盘主，光盘制造方法，贴片，光盘基板，光盘和光盘制造方法
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申请号： US12524871申请日： 2008-11-07
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公开(公告)号： US20100035012A1公开(公告)日： 2010-02-11
- 发明人: Takashi Matsubara , Yoshitake Yanagisawa
- 申请人： Takashi Matsubara , Yoshitake Yanagisawa
- 申请人地址： JP Minato-ku
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JP Minato-ku
- 优先权： JP2007-336230 20071227
- 国际申请： PCT/JP2008/070316 WO 20081107
- 主分类号： B32B3/02
- IPC分类号： B32B3/02 ; B29C59/02 ; B29C33/40
摘要：
In a process of manufacturing a disc master, a stamper, a disc substrate, and an optical disc, separation performance between the stamper and the disc substrate and maintenance of satisfactory signal characteristics after the optical disc is manufactured are taken into consideration in the step of manufacturing the disc master. In the disc master, a boundary portion between a recessed portion and a non-recessed portion includes a small protrusion which protrudes from a flat surface of the non-recessed portion. The shape of the disc master is inversely transferred to the stamper, and the shape of the stamper is inversely transferred to the disc substrate. The separation performance is improved and the signal characteristics are maintained due to the shape of the boundary portion.