G - Physics – 11 – C
Patent
G - Physics
11
C
352/37.2
G11C 17/00 (2006.01) G11C 19/08 (2006.01)
Patent
CA 1187175
MAGNETIC BUBBLE MEMORY DEVICE AND METHOD FOR OPERATING THE SAME ABSTRACT OF THE DISCLOSURE A magnetic bubble memory device comprises: a magnetic layer having a first region having an easy axis of magneti- zation extending in a certain direction and a second region surrounding the first region and having an easy axis of magnetization substantially perpendicular to that of the first region, said first region defining a plurality of bubble propagation patterns; and a replicate gate comprising a stretch conductor pattern to which an electric current is applied so as to stretch a bubble between said propagation patterns and a cutting pattern formed in the second region between the propagation patterns and adapted to lower the bubble collapse field so as to cut the stretched domain. The replicate gate is operated by applying an operating current pulse to the stretch conductor pattern, said oper- ating pulse comprising a stretch pulse for stretching the bubble and a cut pulse, following the stretch pulse, for cutting the stretched domain.
409485
Komenou Kazunari
Matsuda Kazuo
Miyashita Tsutomu
Ohashi Makoto
Satoh Yoshio
Fujitsu Limited
Mcfadden Fincham
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