Magnetic head and method for producing the same

Details Magnetic head and method for producing the same Magnetic head and method for producing the same

1998-09-10

1999-10-05

Cao, Allen T.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5127

Patent

active

059634022

ABSTRACT:
To provide a magnetic head and a method for producing the same with a high dimension precision and a good shield effect, a cutaway 35 is formed by applying a machining process to a closure member 22, and first, second and third ribs 31, 32 and 33 of a back yoke base member 30 formed by molding, thereby obtaining a back yoke. A width of the first, second and third ribs 31, 32 and 33 is made large. There is no fear that the deformation or warpage would occur due to molding or sintering. As a result, it is possible to increase a height of first, second and third leg portions 19, 20 and 21. It is therefore possible to increase the desired reproduction output by increasing the number of turns of coils. It is possible to dispense with a gap formed on a bottom side of the back yoke, that has been required for extracting lead lines in the conventional manner. It is possible to simplify the shape of the back yoke not only to enhance the dimension precision but also to restrict the inflow of the magnetic field through the gap formed on the bottom side from the outside to thereby reduce the adverse affect of the external magnetic field.

REFERENCES:
patent: 4883950 (1989-11-01), Chiba et al.
patent: 5459629 (1995-10-01), Wakasugi
patent: 5497283 (1996-03-01), Kato
patent: 5629821 (1997-05-01), Wakasugi et al.

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