Perpendicular recording magnetic disk apparatus

Details Perpendicular recording magnetic disk apparatus Perpendicular recording magnetic disk apparatus

2007-10-30

2007-10-30

Klimowicz, William J (Department: 2627)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

C360S135000, C360S125330

Reexamination Certificate

active

10992850

ABSTRACT:
A perpendicular recording magnetic disk apparatus has a perpendicular two-layered medium including a pinning layer, a soft underlayer and a perpendicular recording layer, and a write head including a main pole, a return yoke and an exciting coil. In this apparatus, a magnetization recoverable magnetic field Hexfby which the pinning layer and the soft underlayer ensure a magnetization recovery ratio of 1 is larger than a magnetic field applied by the write head to the pinning layer.

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Austrian Search Report dated Nov. 9, 2006 for Appln. No. 200407069-4.

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