System for magnetic contact duplication

Details System for magnetic contact duplication System for magnetic contact duplication

1995-03-15

1998-08-18

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

428694T, G11B 586

Patent

active

057965331

ABSTRACT:
A system for magnetic contact duplication by transferring an information signal recorded on a mother tape onto a blank tape, wherein the mother tape and the blank tape each includes at least one magnetic thin film having columns of magnetic grains grown obliquely, the column gradient .theta..sub.B1 of the magnetic grains in an uppermost magnetic thin film of the blank tape being smaller than the column gradient .theta..sub.M1 of the magnetic grains in an uppermost magnetic thin film of the mother tape, the mother tape and blank tape are superposed such that the column growth direction of the magnetic grains in the uppermost magnetic thin film of the mother tape and the column growth direction of the magnetic grains in the uppermost magnetic thin film of the blank tape intersect and such that these uppermost magnetic films face each other, and a bias magnetic field is applied from the substrate side of the blank tape.

REFERENCES:
patent: 4091158 (1978-05-01), Kasuga
patent: 4387136 (1983-06-01), Saito
patent: 4410603 (1983-10-01), Yamamori
patent: 4819102 (1989-04-01), Shirai
patent: 5164243 (1992-11-01), Kanazawa
patent: 5247397 (1993-09-01), Sato
patent: 5418059 (1995-05-01), Sugita

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