Access Channel for Field Access Bubble Lattice File
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Publishing Venue
IBM
Related People
Chang, H: AUTHOR [+1]
Abstract
Arrays of chevron-shaped magnetic elements can be used to move bubble domains in a lattice, in response to the reorientation of a magnetic field in the plane of the bubble medium. The lattice domains are moved in a manner which maintains the integrity of the lattice, in response to attractive poles along the chevron elements and bubble-bubble interactions between bubbles not directly driven by the attractive poles. Both symmetrical-shaped chevron elements and asymmetrical-shaped chevron elements can be used. Additionally, asymmetric chevron elements can be used to move bubble domains in the lattice along either its 0 degree (row) direction or 60 degree (column) direction, depending upon the bias field and drive field magnitudes.
Access Channel for Field Access Bubble Lattice File
Arrays of chevron-shaped magnetic elements can be used to move bubble domains in a lattice, in response to the reorientation of a magnetic field in the plane of the bubble medium. The lattice domains are moved in a manner which maintains the integrity of the lattice, in response to attractive poles along the chevron elements and bubble-bubble interactions between bubbles not directly driven by the attractive poles. Both symmetrical-shaped chevron elements and asymmetrical-shaped chevron elements can be used. Additionally, asymmetric chevron elements can be used to move bubble domains in the lattice along either its 0 degree (row) direction or 60 degree (column) direction, depending upon the bias field and drive field magnitudes.
The symmetric-shaped chevron elements have been demonstrated to provide reliable bubble propagation along the 0 degree axis. Therefore, a bubble lattice file can be provided in which symmetric chevron elements are used to provide one-dimensional propagation while a column of asymmetric elements can be used to provide bubble propagation along either the 0 degree direction or the 60 degree direction of the lattice, depending upon the magnitudes of the bias field and drive field.
This is illustrated in the drawing, where one-dimensional propagation patterns are used for translating the bubble lattice to the left or to the right, depending upon the direction of rotation of the drive field. T...