发明名称 |
Optical recording medium |
摘要 |
An optical recording medium comprising adjacent thin layers of two different materials, which, upon marking with an energy beam, form a marked area comprising an alloy or mixture of the two materials. The optical properties of the marked area has contrast sufficiently different from the optical properties of the unmarked area so that the marked area can be reliably sensed. One of the first of the thin layers comprises a metal and the other of the thin layers comprises a metal or a semiconductor. The metals are taken from the group comprising Al, Au, Pb and Sn and the semiconductors are chosen from the group comprising Ge and Si.
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申请公布号 |
US4477819(A) |
申请公布日期 |
1984.10.16 |
申请号 |
US19820388319 |
申请日期 |
1982.06.14 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
LEE, MICHAEL H.;ONTON, AARE;WIEDER, HAROLD |
分类号 |
B41M5/26;G01D15/34;G11B7/24;G11B7/243;(IPC1-7):G01D15/34 |
主分类号 |
B41M5/26 |
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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