发明名称 |
Disc-like information recording medium, stamper, stamper configuring apparatus, disc master and hub mounting apparatus |
摘要 |
A disc recording element is provided with a disc substrate having a hole at its center, a circular information recording area on its surface that is concentric with the hole. A hub is fitted to the hole. The disc substrate has a relief portion thereon for position alignment of the hub.
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申请公布号 |
US6772431(B2) |
申请公布日期 |
2004.08.03 |
申请号 |
US20010920852 |
申请日期 |
2001.08.03 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
IWATA NOBORU;HIROKANE JUNJI |
分类号 |
G11B7/24;G11B7/26;G11B23/00;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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