Dynamic information storage or retrieval – Storage medium structure
Patent
1999-06-17
2000-09-26
Cao, Allen T.
Dynamic information storage or retrieval
Storage medium structure
G11B 584
Patent
active
061250996
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates, generally, to disk drive systems, data storage disks and processes of making and using the same with improved vibration inhibiting capabilities and, in preferred embodiments, to such systems, disks and processes which employ a stiffening structure, such as a framework of ribs, disposed within the disk.
2. Back Ground
Modern computers employ various forms of storage systems for storing programs and data. For example, various forms of disk drive systems have been designed to operate under the control of a computer to record information and/or retrieve recorded information on one or more recording disks. Such disk drives include hard disk drives which employ recording disks that have magnetizable (hard) recording material, optical disk drives which employ recording disks that have optically readable recording material, mageneto-optical (MO) disk drives which employ recording disks that have optically readable magenetizable recording material, or the like.
Conventional disk drive systems typically include one or more recording disks supported for relatively high speed rotation on a rotary spindle. For example, FIG. 1a shows a side view of portions of a conventional disk drive system, including a conventional data storage or recording disk 10 supported on a spindle 11. A disk drive motor (not shown) is operatively coupled to the spindle 11 for rotation of the spindle and the disk supported thereon. A recording and/or reading head 12 is supported by suitable head support structure (not shown) adjacent the recording surface of the disk. To simplify the disclosure, FIG. 1 is shown with a single recording disk 10 having a single recording surface and a single head 12. However, other conventional disk drive systems employ multiple disks, double-sided disks (disks with recording surfaces on both surfaces) and multiple heads.
For purposes of illustration, the disk 10 is described herein as an MO disk. As shown in FIG. 1a, the disk 10 has a central hub opening through which the spindle 11 extends, and is formed with multiple layers, including at least one substrate or support layer 14, a recording layer 15 supported on the substrate layer 14 and at least one protective layer 16 on the recording layer. Further layers, such as one or more layers of dielectric material, may also be included in the layered disk structure, for example, between the protective layer and the recording layer.
The disk 10 and spindle 11 are shown in a top view in FIG. 1b. The spindle 11 extends through a central opening, which defines an inside diameter, of the disk. The disk is secured at its inner diameter (ID), in a fixed relation with the spindle 11, and is supported such that the outer diameter (OD) portion of the disk is free from contact with other components. In this regard, the disk is clamped at its ID to the spindle 11 and is free at its OD. When the spindle 11 is rotatably driven, the disk 10 is cause to rotate with the spindle.
The head 12 is supported for movement in the radial direction of the disk, such that the head may be selectively positioned adjacent any recording location on the recording surface of the disk, as the disk is rotated. In operation, the head 12 is moved in the radial direction to align or register with a desired track location on the recording surface of the disk. Once aligned or registered with the desired track location, the head is operated to read or write information onto the recording surface at the desired track location. It is important to properly register the head with the track location to effect accurate reading or writing operations on the registered track.
Modern advances in disk drive technology have resulted in increased disk storage density and decreased track widths, such that greater amounts of information may be stored per given recording surface area. However, as track widths decrease (and storage density increases), the need for accurate head registration increases. In general, smaller track widths requi
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Boutaghou Zine-Eddine
Hipwell Mary Cynthia
Cao Allen T.
Seagate Technology Inc.
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