Browse Prior Art Database

Closed Flux Magnetic Thin Film Device

IP.com Disclosure Number: IPCOM000096703D
Original Publication Date: 1963-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Pecheux, MG: AUTHOR

Abstract

A high permeability base plate is employed to provide a short bit length closed flux path thin film magnetic memory exhibiting high speeds and requiring low power inputs.

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Closed Flux Magnetic Thin Film Device

A high permeability base plate is employed to provide a short bit length closed flux path thin film magnetic memory exhibiting high speeds and requiring low power inputs.

Longitudinal slots 4 are cut into high permeability ferrite base plate 2 leaving a sequence of parallel grooves giving the surface the appearance of a plowed field. Bit and sense lines 6 and 8 are positioned within the longitudinal grooves. Potting compound 10, such as epoxy or glass, is embedded in the grooves 4 and about the bit and sense lines 6 and 8. Then, top surface 12 is made planar by grinding the polishing to a smooth finish. Following this, parallel strips 14 coated with a thin magnetic film 16 are positioned perpendicular to the longitudinal grooves 4 in base plate 2. The conductor portion 18 of strip conductor 14 provides the word line and the magnetic film 16 provides the storage medium.

The structure lends itself to mass fabrication techniques and takes advantage of the orthogonal mode drive for magnetic film memories.

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