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Title:
Apparatus for high density bubble storage
Abstract:
A magnetic bubble storage system and a method for making it using only two masking steps, one of which is critical. In a preferred embodiment, the storage regions are comprised of ion implanted propagation elements which can be contiguous with one another. The functions of write, read, storage, transfer between storage elements in different shift registers, and annihilation are provided by the method in which the same mask is used to define ion implanted regions and for formation of conductor metallurgy. Permalloy bridges over ion implanted regions are used to provide transfer of information between one storage element and another. In a preferred embodiment, NiFe is used for sensing, annihilation, and transfer of information, while the storage registers are comprised of ion implanted regions defining contiguous propagation elements of generally circular geometry.
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Inventors:
Keefe, George E. (Montrose, NY, US)
Application Number:
839720
Filing Date: 1977-10-05 Publication_date: 1979-08-07 Assignee:
International Business Machines Corporation (Armonk, NY)
Primary Class(es):
365/36
365/12, 365/15, 365/29
Other Classes:
US Patent Ref:
| 3618054 | Nov, 1971 | Bonyhard et al. | 365/16. | | 3691540 | Sep, 1972 | Almasi et al. | 365/8. | | 3701125 | Oct, 1972 | Chang et al. | 365/5. | | 3828329 | Aug, 1974 | Fischer et al. | 365/36. | | 3967002 | Jun, 1976 | Almasi et al. | 365/41. | | 4040019 | Aug, 1977 | Bullock | 365/36. |
Other Refs:
Other References:
IBM Technical Disclosure Bulletin, vol. 18, No. 4, Sep. 1975, pp. 1274-1275. |