Method for making high density magnetic bubble domain system
US3967002A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Dec 31, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/34
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for making a high density magnetic bubble domain system including the functions of read, write, storage, transfer, and annihilation. Only three masking steps are required, of which only one requires critical alignment. The proces makes use of the fact that magnetic disks can be placed on non ion implanted regions without adversely affecting the propagation properties of the implanted regions. Thus, the magnetic disks can be used to define ion implantation masks as well as for providing functions such as generation, propagation, reading, and annihilation. Magnetic elements for generation, storage and propagation, reading and annihilation are deposited in the same non-critical masking step, while all condutors used for writing, reading, and transfer are deposited by a single masking step requiring critical alignment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.