Magnetic bubble memory
US4689769A · kind A · utility
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5Claims
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Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/085
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A magnetic bubble memory has the longitudinal direction of a minor loop, i.e. a row of permalloy patterns, on a magnetic film of a (111) crystal plane aligned with the [110] crystal axis of the magnetic film. By aligning the direction of bubble transfer in the minor loop with the [110] crystal axis, the bias magnetic field margin, .DELTA.H.sub.B, is enabled to increase and the strength of the holding magnetic field, H.sub.DC, is enabled to decrease.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.