Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnetostrictive-type device
Reexamination Certificate
2005-05-10
2009-10-06
Enad, Elvin G (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnetostrictive-type device
C335S306000, C324S252000, C360S322000
Reexamination Certificate
active
07598835
ABSTRACT:
The present invention aims to provide a magnetic sensor provided with a magnetoresistive effect element capable of stably maintaining a direction of magnetization in a magnetic domain of a free layer.The magnetic sensor includes a magnetoresistive effect element provided with narrow zonal portions11a . . .11aincluding a pinned layer and a free layer. Disposed below both ends of the free layer are bias magnet films11b . . .11bcomposed of a permanent magnet that applies to the free layer a bias magnetic field in a predetermined direction and an initializing coil31that is disposed in the vicinity of the free layer and applies to the free layer a magnetic field having the direction same as that of the bias magnetic field by being energized under a predetermined condition. Further, magnetizing the bias magnet films and fixing the direction of magnetization of the pinned layer are performed by a magnetic field formed by a magnet array configured such that plural permanent magnets are arranged on a lattice point of a tetragonal lattice and a polarity of a magnet pole of each permanent magnet is different from a polarity of the other adjacent magnet pole spaced by the shortest route.
REFERENCES:
patent: 5678854 (1997-10-01), Meister et al.
patent: 6285097 (2001-09-01), Hazelton et al.
patent: 6438497 (2002-08-01), Mansky et al.
patent: 6483222 (2002-11-01), Pelrine et al.
patent: 6548917 (2003-04-01), Hwang et al.
patent: 6641378 (2003-11-01), Davis et al.
patent: 6690526 (2004-02-01), Ito et al.
patent: 6707298 (2004-03-01), Suzuki et al.
patent: 6712907 (2004-03-01), Pratt et al.
patent: 6721145 (2004-04-01), Beach
patent: 6728080 (2004-04-01), Ito et al.
patent: 6770988 (2004-08-01), Denne et al.
patent: 6791807 (2004-09-01), Hikami et al.
patent: 6904669 (2005-06-01), Sato et al.
patent: 7027271 (2006-04-01), Inage et al.
patent: 2001/0043017 (2001-11-01), Hwang et al.
patent: 2002/0142490 (2002-10-01), Sato et al.
patent: 2004/0145836 (2004-07-01), Kojima et al.
patent: 2004/0212360 (2004-10-01), Sato et al.
patent: 2004/0246632 (2004-12-01), Nishioka et al.
patent: 2005/0054120 (2005-03-01), Wakui et al.
patent: 1367481 (2002-09-01), None
patent: 196 49 265 (1998-06-01), None
patent: 197 42 366 (1999-05-01), None
patent: 1306687 (2003-05-01), None
patent: 2000-338211 (2000-12-01), None
patent: 2002-207071 (2002-07-01), None
patent: 2002-252393 (2002-09-01), None
patent: 2002-299728 (2002-10-01), None
patent: 2004-193540 (2004-07-01), None
Honeywell catalog re Linear Magnetic Field Sensors.
E.W. Hill, et al., “A giant magnetoresistive magnetometer,” Sensors and Actuators A 59 (1997), pp. 30-37.
R. Neale, “Taming the Giant MagnetoResistance (GMR) effect”, electronic engineering, Apr. 1996, pp. 36-38 and 40.
Carl H. Smith, et al., “The Growing Role of Solid-State Magnetic Sensing,” Nonvolatile Electronics, Inc., pp. 139-149.
Jaquelin K. Spong, et al., “Giant Magnetoresistive Spin Valve Bridge Sensor,” IEEE Transactions On Magnetics, vol. 32, No. 2, Mar. 1996, pp. 366-371.
J. Daughton, et al., “Magnetic Field Sensors Using GMR Multilayer,” IEEE Transactions On Magnetics, vol. 30, No. 6, Nov. 1994, p. 4608-4610.
Oohashi Toshiyuki
Wakui Yukio
Dickstein & Shapiro LLP
Enad Elvin G
Rojas Bernard
Yamaha Corporation
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