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Fabricating Ferrite Magnetic Heads

IP.com Disclosure Number: IPCOM000097767D
Original Publication Date: 1961-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Schuenzel, EC: AUTHOR

Abstract

This is a method for fabricating magnetic read-write heads of ferrite material. The method produces heads having very small gaps without requiring complicated polishing operations.

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Fabricating Ferrite Magnetic Heads

This is a method for fabricating magnetic read-write heads of ferrite material. The method produces heads having very small gaps without requiring complicated polishing operations.

Ferrite powder is placed in a pressing die and compacted slightly. The upper punch is withdrawn and a very thin metal shim of the desired gap length is placed on the compact. Another preformed ferrite compact is placed in the die over the shim and the mass is compacted to the desired density. The resultant block of ferrite with the shim embedded in it is removed and sintered to the desired grain size.

The block of ferrite is then cut to produce a plurality of thin slices having a thickness equal to the desired gap width. Each slice is then ultrasonically cut or machined, removing the shaded area shown in the lower left-hand drawing. This leaves two opposing heads held by the metal shim. The two heads are separated producing a ferrite magnetic read-write head having a gap length equal to the thickness of the metal shim.

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