Thin film magnetic head having magnetic layers of different thic

Details Thin film magnetic head having magnetic layers of different thic Thin film magnetic head having magnetic layers of different thic

1989-01-11

1997-04-08

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Core

360125, 360110, 360119, G11B 5147, G11B 5127

Patent

active

RE0354902

ABSTRACT:
A thin film magnetic head for performing recording and readout operations to a magnetic recording medium and a method of manufacturing the head. The magnetic head [comprises] includes a substrate, a first magnetic layer formed on the substrate, a conductor coil on the first layer and a second magnetic layer formed on the conductor coil and the first magnetic layer. The second magnetic layer is imparted with a greater thickness than the first magnetic layer to thereby strengthen the magnetic field for recording and reducing the peak shift making appearance in readout operation due to interference between successively read-out waveforms. The thin film magnetic head exhibits an improved reproduction characteristic which permits reproduction with high fidelity the magnetized locations recorded on the medium with high recording density which assures an improved recording characteristic. By controlling the thickness of the second magnetic layer at an inclined portion thereof, magnetic saturation thereat is substantially prevented.

REFERENCES:
patent: 3152225 (1964-10-01), Peters
patent: 4295173 (1981-10-01), Romankiw et al.
patent: 4423451 (1983-12-01), Chi
patent: 4429337 (1984-01-01), de Wilde
patent: 4490760 (1984-12-01), Kaminaka et al.
patent: 4575777 (1986-03-01), Hosokawa
IBM Publication No. EP-A-0012326, published Jun. 25, 1980, Anderson et al.
IBM Publication No. EP-A-0013363, published Jul. 23, 1980, Kennedy et al.

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