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Column Access Bubble Lattice Device Having a Buffer of Individual Bubble Domains

IP.com Disclosure Number: IPCOM000082882D
Original Publication Date: 1975-Feb-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Hsu, TL: AUTHOR [+3]

Abstract

A column access bubble lattice device having a buffer region on both sides of the bubble lattice consisting of columns of individual bubble domains is described. As shown in Fig. 1, the bubble lattice has columns on both sides containing buffer bubbles which are colored black. Positioned between the two buffer zones are columns of information carrying bubbles which are not colored.

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Column Access Bubble Lattice Device Having a Buffer of Individual Bubble Domains

A column access bubble lattice device having a buffer region on both sides of the bubble lattice consisting of columns of individual bubble domains is described. As shown in Fig. 1, the bubble lattice has columns on both sides containing buffer bubbles which are colored black. Positioned between the two buffer zones are columns of information carrying bubbles which are not colored.

In each buffer region, there are conductor lines which annihilate bubbles and which are used for translation purposes as well. There is also a conductor line in each buffer region which serves as a bubble column generator. The bubble column generators may be in the form of the device shown in Fig. 2 or as shown in Fig. 3.

In Fig. 2, a sawtooth conductor line is shown. A magnetic field occurs at the points in the conductor where the current density is the largest. This configuration will produce a column of bubbles when a current pulse is applied. It is contemplated that a current density greater than 10/6/ A/cm/2/ will be required.

The design shown in Fig. 3 would permit the use of the magnetic field from the permalloy (Allegheny Ludlum Steel Corporation) elements to nucleate bubbles. The permalloy is magnetized by applying a current pulse. A bubble is then nucleated at a permalloy element. This design will most likely involve lower current densities than the design shown in Fig. 2.

An alternative design w...