Method of electrostatically sensing track position information f

Details Method of electrostatically sensing track position information f Method of electrostatically sensing track position information f

1990-03-13

1992-04-07

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Record medium

360 7703, 360134, 360135, 369 14, 369126, G11B 1300, G11B 574

Patent

active

051033623

ABSTRACT:
Storage capacity of a magnetic recording medium is increased by providing a nonconductive layer over a magnetic layer on which magnetic data is writable in a series of recording tracks, and applying a pattern of electrostatic charges to the nonconductive layer above at least one of the recording tracks to write track-position-denoting servo information in overlying relation to magnetic data. The pattern may be applied by electrostatic charges selectively of negative or positive polarity that are imprinted while the medium is in a mold or advanced over an electro-photographic charge transfer drum, for thereby preprinting the pattern as a step in fabrication of the medium.

REFERENCES:
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patent: 4489278 (1984-12-01), Sawazaki
patent: 4556597 (1985-12-01), Best et al.
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patent: 4843494 (1989-06-01), Cronin et al.
patent: 4860277 (1989-08-01), Wisseroth et al.
patent: 4961123 (1990-10-01), Williams et al.

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