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Ferrite Transducing Head with Transmutative Portion

IP.com Disclosure Number: IPCOM000094491D
Original Publication Date: 1965-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

DiMarco, FJ: AUTHOR

Abstract

A ferrite transducing head can be constructed having a transmutative portion with a permeability approaching that of air. This is accomplished by altering the magnetic properties of a ferrite core in the selected region for the portion.

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Ferrite Transducing Head with Transmutative Portion

A ferrite transducing head can be constructed having a transmutative portion with a permeability approaching that of air. This is accomplished by altering the magnetic properties of a ferrite core in the selected region for the portion.

The transmutative portion is formed in a continuous ferrite core structure 1. Region 2 is formed by directing a concentrated beam of radiation, such as an ultrasonic, electromagnetic or a laser beam, at the core structure.

This beam alters the magnetic properties of the ferrite material in that region so as to change its permeability without changing its structure. The symbolic portion indicated at 3 is then undercut from the gap region so as to assure concentration of the magnetic lines of force.

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