Patents Assigned to Micromem Technologies Inc.
  • Patent number: 7110312
    Abstract: A non-volatile magnetic memory cell having a magnetic element with multiple segments which are not co-linear. Each of the segments is magnetized with a remnant magnetic field using a single write line. The segments can be magnetized in a first direction or a second direction, corresponding to first and second orientations of the memory cell. A sensor is provided to determine the direction in which the segments are magnetized and thereby the orientation of the cell. The segments are oriented such that the magnetic flux fields created by their respective remnant magnetic fields have a cumulative effect at a sensing region of the sensor. The cumulative effect allows a less sensitive sensor to be used than in known device. In various embodiments, the magnetic element can have a number of linear segments or a curved profile. In another embodiment, multiple magnetic elements are magnetized by a single write line.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: September 19, 2006
    Assignee: Micromem Technologies Inc.
    Inventors: James Stephenson, Bruce Shipley, Dan Carothers