Laminated magnetic record/playback head with thin films of high

Details Laminated magnetic record/playback head with thin films of high Laminated magnetic record/playback head with thin films of high

1991-03-25

1993-08-24

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5147, G11B 5133

Patent

active

052394352

ABSTRACT:
A thin film magnetic record/playback head having suitably thin layers of soft, high permeability magnetic material, such as permalloy, electrically insulated from each other by very thin layers of a magnetic material having suitably high resistivity, such as NiZn ferrite. The improved magnetic record/playback head is capable of reading and writing much higher bit densities (up to about 100 kfci) and at much higher frequencies (100 MHz or higher) than prior art devices while remaining fully compatible with existing electronic circuitry.

REFERENCES:
patent: 4754354 (1988-06-01), Jeffers
patent: 4769729 (1988-09-01), Kumasaka et al.
patent: 4799118 (1989-01-01), Yamada et al.
patent: 4814921 (1989-03-01), Hamakawa et al.
Journal of Crystal Growth, Nade et al, "High . . . Targets", vol. 45, 1978, pp. 361-364.

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