Magnetic head for effecting perpendicular magnetic recording

Details Magnetic head for effecting perpendicular magnetic recording Magnetic head for effecting perpendicular magnetic recording

1984-08-14

1987-06-09

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

360119, G11B 5127, G11B 523

Patent

active

046724940

ABSTRACT:
In a magnetic head for perpendicular magnetization recording of a main magnetic pole exited type, a high permeability magnetic thin layer is held at its top portion by nonmagnetic supporter and the thin layer is closed by a first high permeability block. The thus constructed main magnetic pole is surrounded by a second high permeability block, and a third high permeability block is located in facing relation to the main magnetic pole and second high permeability material. This magnetic head has high recording and reproducing efficiency and well-shielded from external magnetic field. Some structural improvements are also provided so that leakage of magnetic flux, disconnection and short circuit of a coil are avoided.

REFERENCES:
patent: 4107751 (1978-08-01), Shimoda
patent: 4383284 (1983-05-01), Isshiki
patent: 4441131 (1984-04-01), Osanai

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