Detection system for a magnetic bubble memory in hybrid technolo

Details Detection system for a magnetic bubble memory in hybrid technolo Detection system for a magnetic bubble memory in hybrid technolo

1988-12-30

1990-03-27

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Detectors

365 36, 365 43, G11C 1908

Patent

active

049126733

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.

REFERENCES:
patent: 4229806 (1980-10-01), Josephs
patent: 4300209 (1981-11-01), Washburn
patent: 4323983 (1982-04-01), Lee

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