Magnetic discrete track recording disk

Abstract

A method of forming a discrete track recording pattern in a magnetic recording disk. In one embodiment, the discrete track recording pattern may be formed in a NiP layer continuous throughout the discrete track recording pattern. Alternatively, the discrete track recording pattern may be formed in a substrate.

Description

TECHNICAL FIELD [0001] Embodiments of this invention relate to the field of disk drives and, more specifically, to disks used in disk drive systems. BACKGROUND [0002] A disk drive system includes one or more magnetic recording disks and control mechanisms for storing data on the disks. The disks are constructed of a substrate, that may be textured, and multiple film layers. In most systems, an aluminum-based substrate is used. However, alternative substrate materials such as glass have various performance benefits such that it may be desirable to use a glass substrate. One of the film layers on a disk is a magnetic layer used to store data. The reading and writing of data is accomplished by flying a read-write head over the disk to alter the properties of the disk's magnetic layer. The read-write head is typically a part of or affixed to a larger body that flies over the disk, referred to as a slider. [0003] The trend in the design of magnetic hard disk drives is to increase the rec...

AI Technical Summary

Problems solved by technology

Also, because the track widths are very small, any misregistration of a track (e.g., thermal expansion) may affect the writing and / or reading with the head by an adjacent track.

One problem with prior DTR magnetic recording disks is that they may not have a desired “preferred” circumferential orientation of magnetic material in their magnetic recording films.

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