发明名称 |
METAL MOLD DEVICE FOR MANUFACTURING DISK-LIKE SUBSTRATE MATERIAL, METHOD OF MANUFACTURING DISK-LIKE SUBSTRATE MATERIAL, DISK-LIKE SUBSTRATE MATERIAL FOR OPTICAL DISK, AND OPTICAL DISK |
摘要 |
A metal mold device (30) capable of forming a disk−like substrate material for an optical disk with a center hole so that a resin layer with uniform thickness distribution can be formed thereon, a stamper (10) is held on a movable metal mold (34) by a sucking means (36) in a cavity (31), a through−hole (10A) smaller in diameter than the center hole of the optical disk is formed in the stamper (10), and a metal mold split line and a step are not present at the portion of the information recording surface (12A) of the disk−like substrate material (12) formed by injection molding corresponding to an area ranging from the outer periphery of the stamper (10) to the through−hole (10A).
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申请公布号 |
WO03042995(A1) |
申请公布日期 |
2003.05.22 |
申请号 |
WO2002JP11810 |
申请日期 |
2002.11.12 |
申请人 |
TDK CORPORATION;YAMAGA, KENJI;SAKAI, YOSHIMI;USAMI, MAMORU |
发明人 |
YAMAGA, KENJI;SAKAI, YOSHIMI;USAMI, MAMORU |
分类号 |
B29C33/00;B29C45/00;B29C45/26;B29D17/00;G11B7/26;(IPC1-7):G11B7/26 |
主分类号 |
B29C33/00 |
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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