Browse Prior Art Database

Single Level Bubble Propagation and Transfer Device

IP.com Disclosure Number: IPCOM000082235D
Original Publication Date: 1974-Oct-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Keefe, GE: AUTHOR

Abstract

The figure shows a portion of a major/minor loop system configuration, and in particular a transfer gate 10 which can be used to transfer bubble domains between the major loop and the minor loop. The structure is made by single-level masking in which the transfer control line is a conductor located adjacent to the bubble domain film, on which is deposited the permalloy propagation structures 12. The same mask is used for the transfer control line as well as for the permalloy propagation elements.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Single Level Bubble Propagation and Transfer Device

The figure shows a portion of a major/minor loop system configuration, and in particular a transfer gate 10 which can be used to transfer bubble domains between the major loop and the minor loop. The structure is made by single-level masking in which the transfer control line is a conductor located adjacent to the bubble domain film, on which is deposited the permalloy propagation structures 12. The same mask is used for the transfer control line as well as for the permalloy propagation elements.

In this design, the transfer control line is integrated with an I bar propagation element 14, which is common to the adjacent major and minor loops. In normal operation, bubble domains will propagate independently in their respective loops as an in-plane magnetic field reorients. When a bubble domain is to be transferred from one loop to the other, the following steps occur:
1. The bubble to be transferred is propagated to the common I

bar 14 and the in-plane magnetic field is turned off.
2. The transfer control line is then pulsed with a current in

the appropriate direction, and the bubble domain is

transferred to the opposite end of I bar 14.
3. The in-plane field is turned on again so that the bubble

domain will continue its propagation independently, in the

minor loop.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]