Magnetic bubble domain structure
US4343038A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Sep 2, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/08
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A magnetic bubble domain structure comprising a bubble domain layer supported by a nonmagnetic substrate. A control layer is superimposed on the major surface of the domain layer which remote from the substrate. The control layer has an easy axis of magnetization in the plane which defines at least one bubble domain propagation path. The unique control layer according to the invention may be a garnet layer which comprises two sublayers: a first, continuous, sublayer, and a second, discontinuous, sublayer. The discontinuous sublayer defines the required propagation patterns. An advantage of the invention is that the in-plane rotary field to be applied for propagating the bubble domains can be considerably weaker than in bubble domain structures which are equipped with nickel-iron propagation patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.