Magnetic Field Transducer Mounting Apparatus for MTJ Device Testers
AssigneeSpin Transfer Technologies, Inc.
InventorsDanny YAM, Jorge VASQUEZ, Georg WOLF, Roberto CORDERO
Life of this patent
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Abstract
A magnetic field transducer mounting apparatus can include a first mount configured to fixedly couple to a side surface of a wafer test fixture magnet, and a second and third mount configured to adjustably position a magnetic field transducer in a predetermined location proximate a face of the wafer test fixture magnet.
Claims20
A magnetic field transducer mounting apparatus comprising:
- a first non-magnetic element including;
- a first mounting portion configured to fixedly couple the first non-magnetic element to a side surface of a wafer test fixture magnet;
- a second mounting portion;
- and
- a spacer portion configured to fixedly position the second mounting portion a predetermined distance from the first mounting portion adjacent the side surface of the wafer test fixture magnet;
- and
- a second non-magnetic element including;
- one or more surfaces configured to couple to a magnetic field transducer;
- and
- a third mounting portion configured to couple to the second mounting portion and adjustable position the magnetic field transducer in a predetermined position adjacent a face of the wafer test fixture magnet.
The magnetic field transducer mounting apparatus of claim 8, further comprising:
- the one or more surfaces including a surface disposed distally from the third mounting portion and transverse to the face of the wafer test fixture magnet is configured for fixedly coupling to the magnetic field transducer.
The magnetic field transducer mounting apparatus of claim 8, further comprising:
- the one or more surfaces including;
- a first surface disposed distally from the third mounting portion and transverse to the face of the wafer test fixture magnet is configured for abutting the magnetic field transducer;
- and
- a second surface adjacent the first surface and configured for fixedly coupling to the magnetic field transducer.
The magnetic field transducer mounting apparatus of claim 8, further comprising:
- the one or more surfaces including a transducer receptacle distally disposed from the third mounting portion and configured to contain the magnetic field transducer.
The magnetic field transducer mounting apparatus comprising:
- a first elongated portion including a first mount configured for fixedly coupling to a side surface of a wafer test fixture magnet;
- a second elongated portion including a second mount;
- a third elongated portion including a third mount configured for coupling to the second mount and adjustable position a magnetic field transducer in a predetermined position adjacent a face of the wafer test fixture magnet;
- and
- wherein the second elongated portion is disposed transverse to the first elongated portion in a first plane, and the second elongated portion is disposed transverse to the third elongated portion in a second plane, wherein the first plane is transverse to the second plane.
A method of controlling a magnetic field of a wafer test fixture magnet comprising:
- measuring a magnetic field generated by a wafer test fixture magnet during testing of a wafer of Magnetoresistive Tunnel Junction (MTJ) devices using a first magnetic field transducer positioned, by a magnetic field transducer mounting apparatus, in a predetermined location adjacent a face of the wafer test fixture magnet;
- and
- controlling the magnetic field generated by the wafer test fixture magnet based on the measurement of the magnetic field at the first magnetic field transducer during the testing of the wafer of MTJ devices.
Dependencies are inferred from the claim text.