发明名称 |
Multi-layer amorphous optical recording medium. |
摘要 |
<p>A multi-layer magneto optical thin film recording medium is disclosed having very high carrier-to-noise ratios (at least 47 decibels) and high rotation angles. A transmission electron microscope photomicrograph (at 200,000 X) of one such medium is shown in Figure 1. The magneto optic layer is a multiphase amorphous material having magnetic anisotropy perpendicular to the plane of the thin film produced in a triode vacuum sputtering process at vacuums in the range of 4 x 10-3 to 6 x 10-4 Torr. Various transparent layers, such as dielectric intermediate and anti-reflective layers and a protective covering layer, are combined with the magneto optic layer and a reflective surface to yield media having enhanced carrier-to-noise ratio and magneto optic angle of rotation.</p> |
申请公布号 |
EP0126589(A2) |
申请公布日期 |
1984.11.28 |
申请号 |
EP19840303140 |
申请日期 |
1984.05.09 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
FREESE, ROBERT P. MINNESOTA MINING AND;JOHNSON, LESLIE H. MINNESOTA MINING AND;RINEHART, THOMAS A. MINNESOTA MINING AND;GARDNER, RICHARD N. MINNESOTA MINING AND |
分类号 |
G11B5/851;G11B11/10;G11B11/105;G11C13/06;(IPC1-7):11B7/24 |
主分类号 |
G11B5/851 |
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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