The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1976
Filed:
Dec. 31, 1974
George E Keefe, Montrose, NY (US);
Mark H Kryder, Yorktown Heights, NY (US);
Yeong S Lin, Mount Kisco, NY (US);
International Business Machines Corporation, Armonk, NY (US);
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.