Browse Prior Art Database

Batch Fabricated Magnetic Head

IP.com Disclosure Number: IPCOM000090473D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Brownlow, JM: AUTHOR [+3]

Abstract

This method of making a magnetic read-write head is suitable for batch fabrication. Drawing A shows, in section, ceramic insulating body 1 with slots 2 that converge toward one face of body 1. Slots 2 are filled with magnetic material such as permalloy or ferrite to provide the poles of the head. The width of the insulating wedge between poles 2 at its narrow end 3 defines the length of air gap between these poles. The air gap length is increased to the desired amount by machining the surface of body 1. Drawing B shows conductors 4 and 5 placed on substrate 1 between poles 2 to provide windings for reading and writing. If a keeper is used, an insulating layer is placed over the portions of conductors 4 and 5 between poles 2, but not over poles 2. Keeper material then is deposited to bridge the upper ends of poles 2.

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Batch Fabricated Magnetic Head

This method of making a magnetic read-write head is suitable for batch fabrication. Drawing A shows, in section, ceramic insulating body 1 with slots 2 that converge toward one face of body 1. Slots 2 are filled with magnetic material such as permalloy or ferrite to provide the poles of the head. The width of the insulating wedge between poles 2 at its narrow end 3 defines the length of air gap between these poles. The air gap length is increased to the desired amount by machining the surface of body 1. Drawing B shows conductors 4 and 5 placed on substrate 1 between poles 2 to provide windings for reading and writing. If a keeper is used, an insulating layer is placed over the portions of conductors 4 and 5 between poles 2, but not over poles 2. Keeper material then is deposited to bridge the upper ends of poles 2. Substrate 1 can contain several such heads.

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