Master carrier for magnetic transfer

Details Master carrier for magnetic transfer Master carrier for magnetic transfer

2005-09-27

2005-09-27

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

C360S016000, C428S690000, C428S690000, C428S690000

Reexamination Certificate

active

06950252

ABSTRACT:
A master carrier for magnetic transfer is equipped with a substrate with a land/groove pattern of lands and grooves, and a magnetic layer formed on the land/groove pattern. The adhesion between the substrate and the magnetic layer is 1.2×109N/m2or greater. A first oxygen concentration Doat the magnetic layer formed on the land is reduced gradually toward the direction of the depth of the substrate and is greater than a second oxygen concentration Dhat the magnetic layer formed on the groove.

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