Single sided, high density bubble domain propagation device
US3988722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1974 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Dec 31, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F10/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic bubble domain propagation device which is single sided and can be used to move bubble domains in amorphous magnetic films. The propagation structure is comprised of either one or two layers located on a single side of the amorphous magnetic medium. Preferably, the propagation elements in each layer are contiguous to one another to provide maximum density. In a preferred embodiment, the propagation elements are circular, but other geometries can be used. The amorphous magnetic material is deposited over these underlayer propagation elements in order to create a change in the profile of the amorphous material. This change in profile of the amorphous material acts as a restraining barrier to bubble domain movement, so that the bubble domains will move along the proper channel without drifting to other propagation channels, and will move from one propagation element to the next without merely idling at any of the propagation elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.