发明名称 |
MULTI-LAYER AMORPHOUS OPTICAL RECORDING MEDIUM |
摘要 |
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 FIG. 1. The magneto optic layer is a multi-phase 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 4x10-3 to 6x10-4 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 magnetic optic angle of rotation. |
申请公布号 |
AU2831384(A) |
申请公布日期 |
1984.11.22 |
申请号 |
AU19840028313 |
申请日期 |
1984.05.17 |
申请人 |
MINNESOTA MINING AND MANUFACTURING CO. |
发明人 |
ROBERT PAUL FREESE;LESLIE HAROLD JOHNSON;THOMAS ALAN RINEHART;RICHARD NEAL GARDNER |
分类号 |
G11B5/851;G11B11/10;G11B11/105;G11C13/06 |
主分类号 |
G11B5/851 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|