Design of a rigid disc plastic substrate with high stiffness...

Details Design of a rigid disc plastic substrate with high stiffness... Design of a rigid disc plastic substrate with high stiffness...

2005-02-01

2005-02-01

Miller, Brian E. (Department: 2652)

Dynamic magnetic information storage or retrieval

Record medium

Disk

C720S719000

Reexamination Certificate

active

06850391

ABSTRACT:
An injection molded plastic disc substrate incorporating a stiff insert made of a very stiff material (metal, ceramic, composite . . . e.g. silicon) embedded in the plastic matrix. Preferably, the insert has a circular center region and radially extending fingers. Additional features of the web may include one or more chordal connecting elements extending between the fingers. In this way, both vibration or flutter in the circumferential or radial direction is suppressed by the insert.

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J. McAllister, “Disk Flutter: Causes and Potential Cures”, Data Storage, May/Jun. 1997, pp. 29-34.

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