Method of measuring magnetic field gradients

Details Method of measuring magnetic field gradients Method of measuring magnetic field gradients

2007-02-06

2007-02-06

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Magnetometers

C324S260000

Reexamination Certificate

active

11536797

ABSTRACT:
Magnetic field sensors, each generating an electrical output signal in proportion to the local magnetic field, are lithographically fabricated on a semiconductor substrate with a small spatial separation. The lateral dimension of the sensors and the separation length are the order of the minimum lithographic feature size. Comparing the electrical signals of the sensors results in a measurement of the local magnetic field gradient. Large field gradients, that vary on a small spatial scale, may be associated small magnetic structures such as microscopic magnetic particles. Detection of a field gradient can be used to infer the presence of a magnetic particle.

REFERENCES:
patent: 4692702 (1987-09-01), Huschelrath et al.
patent: 5652445 (1997-07-01), Johnson
patent: 5807758 (1998-09-01), Lee et al.
patent: 5833603 (1998-11-01), Kovacs et al.
patent: 5981297 (1999-11-01), Baselt
patent: 6064083 (2000-05-01), Johnson
patent: 6468809 (2002-10-01), Prinz et al.
patent: 6800913 (2004-10-01), Johnson et al.
patent: 2001/0033159 (2001-10-01), Forrest et al.

Affiliated with

Also associated with

Rating

Method of measuring magnetic field gradients does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of measuring magnetic field gradients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring magnetic field gradients will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3892077