发明名称 |
PRODUCTION METHOD AND PRODUCTION DEVICE FOR OPTICAL RECORDING MEDIUM |
摘要 |
An optical recording medium including a light transmitting layer having a uniform thickness formed on a substrate, in which a burr or stripping hardly occurs at the inner periphery of the light transmitting layer, and a manufacturing method and a manufacturing device of the optical recording medium are provided. <??>An optical recording medium 10 is manufactured by a manufacturing method including: molding a disc-like shaped substrate 12 including an information recording face 12A on one side; forming a light transmitting layer 14 thinner than the substrate 12 on the information recording face 12A; forming a circular cut 16 in the light transmitting layer 14; and punching out an area inside the cut 16 by a punching tool 18 to form a center hole 14A in the light transmitting layer 14 and a center hole 20 in the substrate 12. <IMAGE>
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申请公布号 |
EP1533801(A1) |
申请公布日期 |
2005.05.25 |
申请号 |
EP20030730859 |
申请日期 |
2003.06.06 |
申请人 |
TDK CORPORATION |
发明人 |
USHIDA, TOMOKI;USAMI, MAMORU;YAMAGA, KENJI |
分类号 |
G11B7/24;B26D3/08;B26D9/00;B26F1/38;B29D17/00;G11B7/26;G11B23/00;(IPC1-7):G11B7/24 |
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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