Magnetic bubble memory device and method of fabricating the same
US4344153A · kind A · utility
5Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1979 |
| Grant date | Aug 10, 1982 |
| Priority date | — |
| Expiry date | Apr 13, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic bubble memory device and a method of fabricating the device are disclosed in which a conductor pattern lies at least between a film for maintaining magnetic bubbles therein, and a soft magnetic material pattern. Further, the magnetic bubble memory device can be formed precisely without suffering from errors due to mask alignment, by employing a mask provided with a plurality of patterns which are different in transmittance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.