Communications: electrical – Digital comparator systems
Patent
1974-12-31
1976-10-26
Moffitt, James W.
Communications: electrical
Digital comparator systems
G11C 1114
Patent
active
039887227
ABSTRACT:
A magnetic bubble domain propagation device which is single sided and can be used to move bubble domains in amorphous magnetic films. The propagation structure is comprised of either one or two layers located on a single side of the amorphous magnetic medium. Preferably, the propagation elements in each layer are contiguous to one another to provide maximum density. In a preferred embodiment, the propagation elements are circular, but other geometries can be used. The amorphous magnetic material is deposited over these underlayer propagation elements in order to create a change in the profile of the amorphous material. This change in profile of the amorphous material acts as a restraining barrier to bubble domain movement, so that the bubble domains will move along the proper channel without drifting to other propagation channels, and will move from one propagation element to the next without merely idling at any of the propagation elements.
REFERENCES:
patent: 3503054 (1970-03-01), Bobeck et al.
patent: 3702991 (1972-11-01), Bate et al.
patent: 3824568 (1974-07-01), Fischer et al.
patent: 3828329 (1974-08-01), Fischer et al.
Keefe George E.
Kryder Mark H.
Lin Yeong S.
International Business Machines - Corporation
Moffitt James W.
Stanland Jackson E.
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