Browse Prior Art Database

Current Controlled Disk Replicator

IP.com Disclosure Number: IPCOM000056531D
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-14

Publishing Venue

IBM

Related People

Authors:
Calcagno, PA Collins, TW Kryder, MH [+details]

Abstract

Fig. 1A shows an example of a single mask level disk replicator 10 using half disk propagation elements. To replicate a bubble from this replicator, it is necessary to have a seed bubble on the disk 12 and to apply a counter-clockwise rotating field H, as shown in Fig. 1B. When the field is directed straight upward, the bubble domain is stretched along the top of disk 12 to the first I-bar 14. As the field rotates further, the side of the disk nearest the I-bar becomes magnetized in such a direction that the stray field from the disk acts to cut the stretched domain into two pieces. By applying a current pulse (Fig. 1C) to the conductor line 16 during this time, the drive field required to produce cutting of the domain may be reduced by roughly a factor of two.