Anistropic magnetic layer for reducing the signal to noise ratio

Details Anistropic magnetic layer for reducing the signal to noise ratio Anistropic magnetic layer for reducing the signal to noise ratio

1989-12-01

1992-04-14

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Head surface structure

360125, 428900, G11B 5187, G11B 5127, H01F 100

Patent

active

051053233

ABSTRACT:
System comprising a magnetic head (1) and a magnetic information carrier (2), which cooperate with each other through a layer (3) with soft magnetic and lubricating properties. The layer (3) is anisotropic, the relative permeability (.mu.x) of the layer, taken in a direction parallel to the head face (2), being less than the relative permeability (.mu.y) of the layer in a direction perpendicular to the head face (9). By using the said layer in systems in which a certain distance between the magnetic head (1) and the information carrier (2) is desirable, the magnetic resistance is reduced and the signal-to-noise ratio is improved. The layer (3) may be present on both the magnetic head (1) and on the information carrier (2) as well as on both of them.

REFERENCES:
patent: 3845503 (1990-10-01), Kanai
patent: 4576876 (1986-03-01), Shiiki et al.
patent: 4726988 (1988-02-01), Oka et al.

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