发明名称 |
Disk-type recording medium having a crack hindering element |
摘要 |
A disk-type recording for protection of media recording and/or reproduction units, including an information recording surface portion disposed around a center hole and a crack hindering element to hinder the generation of a crack at the center hole from advancing to an outer edge of the disk-type recording media. The crack hindering element includes at least one annular protrusion portion protruded around the center hole.
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申请公布号 |
US2002075794(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
US20010001993 |
申请日期 |
2001.12.05 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
PARK JUN-MIN |
分类号 |
G11B7/24;G11B23/00;(IPC1-7):G11B3/70;G11B5/84;G11B7/26 |
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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