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:
May. 31, 1977
Filed:
Feb. 03, 1975
David Carl Bullock, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A gapless propagation path structure for magnetic bubbles in a magnetic bubble domain memory system employing permalloy elements, wherein the drive field requirements for the in-plane rotating magnetic field may be reduced for high magnetization materials. An overlay pattern of magnetizable material, e.g. permalloy, is provided on a layer of magnetic material of a type suitable for the propagation of magnetic bubble domains therein. The magnetizable overlay pattern includes respective magnetizable elements forming the propagation paths for the magnetic bubble domains, the elements being so arranged as to provide a continuous track of magnetizable material included in the magnetizable overlay pattern, thereby defining a gapless propagation path for the magnetic bubble domains. The in-plane rotating magnetic field within the plane of the magnetic layer on which the magnetizable overlay pattern is disposed causes magnetic bubble domains to travel along respective gapless propagation paths included in the magnetic bubble domain memory system, there being respective movement-controlling elements associated with the gapless propagation paths for maintaining the magnetic bubble domains in motion along the selected bubble propagation path therefor.