Thin film magnetic head

Details Thin film magnetic head Thin film magnetic head

Filed on

1984-09-04

Date issued

1985-12-10

Examiner

Stellar, George G.

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Head

SubSubClass

Core

Other Related Categories

G11B 516

Type

Patent

Status

active

Patent number

045583854

Description

ABSTRACT:
In a thin film magnetic head in which a lower magnetic layer is formed on a non-magnetic substrate through a non-magnetic layer, and a conductive layer constituting a signal winding and an upper magnetic layer are formed on the lower magnetic layer, the lower magnetic layer is formed within a recess formed in the non-magnetic layer. The recess may pass through the magnetic layer. The lower magnetic layer formed within the recess in the non-magnetic layer can considerably reduce raised portions associated with respective upper layers so that the thin film magnetic head can be improved in magnetic efficienty and yield rate during manufacture.

REFERENCES:
patent: 3549825 (1970-12-01), Trimble
patent: 4190872 (1980-02-01), Jones, Jr. et al.
patent: 4281357 (1981-07-01), Lee
"High Track Density Thin-Film Tape Heads", IEEE Transactions on Magnetics, vol. Mag-15, No. 3, Jul. 1979, pp. 1130-1134.

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