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Browse Prior Art Database

Flexible Magnetic Keeper for Thin Film Memories

IP.com Disclosure Number: IPCOM000093867D
Original Publication Date: 1966-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Stapper, CH: AUTHOR

Abstract

This is a magnetic flat film memory configuration. It provides increased sense line data signal outputs and prevents interbit flux interference by utilizing a flexible magnetic keeper.

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Flexible Magnetic Keeper for Thin Film Memories

This is a magnetic flat film memory configuration. It provides increased sense line data signal outputs and prevents interbit flux interference by utilizing a flexible magnetic keeper.

As shown at A, sheet 2 is a continuous, thin ferromagnetic film. It is adapted to have discrete areas, e.g., areas 4, 6 and 8, magnetized to store bits of information. Disposed directly over area 6, for instance, is sense line 10 and bit drive line 12. Orthogonal to bit and sense lines 12 and 10, respectively, is word drive line 14. Overlying the entire drive and sense line configuration is a continuous flexible ferrite keeper 16. Ground plane 18 supports the entire configuration and provides the ground return for all of the drive and sense conductors.

The coincident energization of bit and word lines 12 and 14, respectively, causes a bit of information to be stored in area 6. Like actions by other bit and word drive lines, not shown, cause similar bits of information to be stored at areas 4 and 8. Keeper 16 provides a flux pattern path as shown in B. Flux lines 20 tend to seek the low reluctance path through keeper 16 and do not interfere with adjacent bits as it would if keeper 16 were not present. Moreover, additional flux lines are coupled around sense line 10 and, when the bit is switched, result in increased output signals.

Utilization of keeper 16, therefore, provides increased sense signals, increased disturb tolerances, unifo...