Apparatus for high density bubble storage
US4164029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1977 |
| Grant date | Aug 7, 1979 |
| Priority date | — |
| Expiry date | Oct 5, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/0883
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.