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Isolation Technique for Field Access Bubble Lattice File

IP.com Disclosure Number: IPCOM000086807D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Chang, H: AUTHOR [+2]

Abstract

Lattices of magnetic bubble domains can be moved by overlays of chevron elements arranged in an array. In response to the reorientation of a magnetic field in the plane of the bubble medium, attractive magnetic poles will be created along the chevron elements for movement of the rows and columns of bubbles in the lattice. Due to the attractive poles and also to bubble-bubble interaction, lattices of bubble domains can be efficiently moved in a manner which retains the regularity of the lattice domains. Both symmetric-shaped chevron elements and asymmetric-shaped chevron elements can be used.

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Isolation Technique for Field Access Bubble Lattice File

Lattices of magnetic bubble domains can be moved by overlays of chevron elements arranged in an array. In response to the reorientation of a magnetic field in the plane of the bubble medium, attractive magnetic poles will be created along the chevron elements for movement of the rows and columns of bubbles in the lattice. Due to the attractive poles and also to bubble-bubble interaction, lattices of bubble domains can be efficiently moved in a manner which retains the regularity of the lattice domains. Both symmetric-shaped chevron elements and asymmetric-shaped chevron elements can be used.

The propagation of bubble lattice domains by chevron arrays is powerful enough so that several rows of bubble domains above the top row of chevrons are also propagated in step with the bubble rows in the chevron array as shown in Fig. 1. This factor is utilized to provide isolation between two magnetic bubble lattice files propagating in opposing directions for the same sense of rotation of the magnetic drive field. Isolation between the two files is provided using a minimum area of the magnetic medium in which the bubbles exist and without requiring extra processing or conductor requirements.

In Fig. 2, two chevron arrays 1 and 2, which are inverted with respect to one another, are used to propagate two lattices of bubble domains. While Die lattices are not shown in Fig. 2, chevron array 1 propagates rows of bubble dom...