Method for making high density magnetic bubble domain system
CA 1071759 A · Owner: International Business Machines Corporation · Inventors: Almasi, George S.; Keefe, George E.; Mcgouey, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A method for making a high density magnetic bubble domain system including the functions of read write, storage, transfer, and annihilation. Only three masking steps are required, of which only one requires critical alignment. The process makes use of the fact that magnetic disks can be placed on non ion implanted regions without adversely affecting the propagation properties of the implanted regions. Thus the, magnetic disks can be used to define ion implantation masks as well as for providing functions such as generation propagation, reading, and annihilation. Magnetic elements for generation storage and propagation, reading and annihilation are deposited in …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 1997.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.