Magnetooptic recording medium and its manufacturing method

Details Magnetooptic recording medium and its manufacturing method Magnetooptic recording medium and its manufacturing method

2007-02-06

2007-02-06

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

C369S013070, C369S013430, C369S288000, C428S690000, C428S690000, C428S064400

Reexamination Certificate

active

10482424

ABSTRACT:
A first dielectric layer3,a multilayer magnetic film10in which a first magnetic layer4having perpendicular magnetic anisotropy at room temperature, a second magnetic layer5having inplane magnetic anisotropy at room temperature, and a third magnetic layer6having perpendicular magnetic anisotropy at room temperature are sequentially laminated, a second dielectric layer7,a reflective layer8,and a protective layer9are sequentially laminated onto one principal plane of a disk substrate2on which a land and a groove exist, thereby forming a magnetooptic disk1.Saturation magnetization of the second magnetic layer5is set to a range from 8.80×10−2to 1.76×10−1Wb/m2. A gas pressure upon film creation of the second magnetic layer is set to a range from 0.6 to 3.0 Pa. A content ratio of Co in the third magnetic layer6is set to a range from 15 to 17 atom %.

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