High track density magnetic media with pitted optical servo tracks and method for stamping the tracks on the media
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United States of America Patent
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Nov 19, 1991
Grant Date -
N/A
app pub date -
Oct 20, 1989
filing date -
Oct 20, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flexible magnetic medium having a plurality of optical servo tracks indelibly marked on the medium and a method for stamping the tracks on the medium. The optical servo tracks comprise a plurality of circular concentric regions positioned on a face of a floppy disk with each circular region comprising a plurality of pits. The optical servo tracks are imprinted on the floppy disk by placing a stamper disk bearing a template of the optical servo tracks in a hydraulic press and pressing the stamper disk and floppy disk together, typically under five to nine tons per square inch of pressure.
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