Discrete-Track Magnetic Disk Using Embossed Substrate

Takehisa ISHIDA  Osamu MORITA  Makoto NODA  Satoru SEKO  Shoji TANAKA  Hideaki ISHIOKA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E76-A   No.7   pp.1161-1163
Publication Date: 1993/07/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Spring Conference)
discrete-track,  magnetic disk,  emboss,  etching,  sampled servo,  

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Embossed disks with discrete magnetic tracks and servo marks are proposed and evaluated. The tracks and the servo marks are made by etching the glass substrate. The guard band depth was decided to be 0.2 µm. Using the disks, the head positioning accuracy of 0.09µm (rms) and the recording density of 192 tracks per millimeter were demonstrated.