发明名称 |
Optical recording disk |
摘要 |
An optical recording disk includes a resin substrate having a recording layer thereon and a protective glass substrate, which are joined into an integral disk such that the recording layer is inside. The resin substrate is formed of a resin composition comprising a specific cyclic polyolefin and an optional alkyl phenol condensate. The resulting lightweight, rigid disk is adapted for recording/reproducing operation at high rotational speeds with few focusing errors due to minimized axial runouts.
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申请公布号 |
US5244706(A) |
申请公布日期 |
1993.09.14 |
申请号 |
US19920840065 |
申请日期 |
1992.02.25 |
申请人 |
TDK CORPORATION |
发明人 |
HIRATA, HIDEKI;TANAKA, TOSHIFUMI;SHIBUYA, SETSUKO;MOTAI, ATSUKO |
分类号 |
G11B7/243;G11B7/246;G11B7/253 |
主分类号 |
G11B7/243 |
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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