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Magnetically Isolated Recording Head Elements

IP.com Disclosure Number: IPCOM000083299D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Croll, I: AUTHOR

Abstract

It is proposed to employ garnet magnetic materials for use as magnetic yokes in an array of inductive write heads. The primary advantage gained is the fact that garnets are mechanically sound and offer good wear resistance.

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Magnetically Isolated Recording Head Elements

It is proposed to employ garnet magnetic materials for use as magnetic yokes in an array of inductive write heads. The primary advantage gained is the fact that garnets are mechanically sound and offer good wear resistance.

Basically, an epitaxially grown magnetic ceramic film (low coercivity) 10 is used on a nonmagnetic substrate 12 as pole pieces for magnetic heads, as illustrated. Magnetic isolation is provided by etching (chemically or by sputtering) the magnetic ceramic 10 down to the nonmagnetic substrate 12 in the intertrack region.

The head structure is completed with deposition and etching of the conductor winding 14 on the magnetic ceramic pole faces, and cementing a similar magnetic film piece to form the complete magnetic yoke and the recording gap.

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