公开(公告)号：CA1071760A

公开(公告)日：1980-02-12

申请号：CA238110

申请日：1975-10-20

Applicant: IBM

Inventor： KEEFE GEORGE E ,  KRYDER MARK H ,  LIN YEONG S

IPC: G11C11/14 ,  C10M159/20 ,  G11C19/08 ,  H01F10/00

Abstract: SINGLE SIDED, HIGH DENSITY BUBBLE DOMAIN PROPAGATION DEVICE 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.

公开(公告)号：FR2425124A1

公开(公告)日：1979-11-30

申请号：FR7909107

申请日：1979-04-04

Applicant: IBM

Inventor： KRYDER MARK H

IPC: G11C11/14 ,  G11C19/08

Abstract: A magnetic bubble domain chip having two levels of metallurgy fabricated in a single masking step and including a replicate type bubble generator. The bubble generator includes a magnetic disk which holds a seed domain during reorientation of a magnetic drive field in the plane of the magnetic bubble material, and a conductor located at the leading, i.e., cutting, edge of the magnetic disk. Current in the conductor is used to assist the splitting operation whereby a new domain is split from the stretched seed domain. The conductor includes a first portion having a relatively wide cross-section where most of the current flows through a highly conductive material, such as gold. In the area of the generator, the conductor is narrow and the current path is through the magnetic material comprising the disk. Use of the magnetic material as a conductor path reduces problems due to electromigration and the generator is particularly suitable for use in providing magnetic bubble domains having diameters 2 microns and less.

公开(公告)号：FR2337401A1

公开(公告)日：1977-07-29

申请号：FR7636411

申请日：1976-11-29

Applicant: IBM

Inventor： KRYDER MARK H

IPC: G01R33/07 ,  G11C11/14 ,  G01R33/09 ,  G11C19/08

Abstract: An improved thick film sensor for detection of magnetic bubble domains which can be configured to provide soft error detection and full data rate sensing. The sensor can be fabricated using single level masking techniques and is typically a magnetoresistive sensor comprised of NiFe. In its basic configuration, the sensor is comprised of two sets of magnetoresistive elements, each set including a sensor element and a dummy element, where both the sensor element and the dummy element provide a signal due to the bubble domain to be sensed. The magnetoresistive elements are arranged in a bridge circuit to give full data rate sensing and soft error detection. In a preferred embodiment, chevron expander-detectors are used, although the geometry of the sensor and dummy elements is not limited to chevron-type geometries.