Detection system for a magnetic bubble memory in hybrid technology
US4912673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Dec 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/0858
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Magnetic bubble memory in hybrid technology using rows of chevron patterns. The memory detection system has an active detection zone (4) constituted by rows of chevrons, in order to stretch into the form of a strip the bubbles from a propagation path (2), and a first detector (8); a bubble elimination zone (12) constituted by forcing back means (18) for stopping the advance of the bubbles and for forcing them outside the detection system; and a passive detection zone (6) located following the bubble elimination zone (12) and incorporating a second detector (9), to which no bubble must be exposed, in order to eliminate the unwanted signal due to the influence of a rotary magnetic field necessary for the propagation of the bubbles. According to the invention, elimination zone (12) is provided with at least one barrier (20) produced by ion implantation in order to block the passage of the bubbles from active zone (4) to passive zone (6). The barrier or barriers (20, 22, 26, 28, 30) can be constituted by a high energy implantation of H.sub.2.sup.+ ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.