Thin film magnetic head having at least one magnetic core member

Details Thin film magnetic head having at least one magnetic core member Thin film magnetic head having at least one magnetic core member

1990-05-21

1992-06-30

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 531

Patent

active

051269074

ABSTRACT:
A thin film magnetic head has a first magnetic core member carried by a substrate, a gap layer formed on the first magnetic core member, and a second magnetic core member formed in a spaced relation with the first magnetic core member. The second magnetic core member is coupled to the first magnetic core member to form a magnetic path and to have an end portion of the gap layer sandwiched by gap defining portions of the first and second magnetic core members. A coil conductor is wound about the magnetic path. In one embodiment, the first magnetic core member includes a first magnetic layer made of a magnetic material having stable magnetic properties during heat treatment and the second magnetic core member includes a second magnetic layer made of a material having a saturation flux density higher than that of the material of the first magnetic core member.

REFERENCES:
patent: 4219855 (1980-08-01), Jones, Jr.
patent: 4636897 (1987-01-01), Nakamura et al.
patent: 4769729 (1988-09-01), Kumasaka et al.
patent: 4814921 (1989-03-01), Hamakawa et al.

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