Magnetic sensor and manufacturing method therefor

Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head

Reexamination Certificate

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Reexamination Certificate

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10686261

ABSTRACT:
A magnetic sensor comprises magnetoresistive elements and permanent magnet films, which are combined together to form GMR elements formed on a quartz substrate having a square shape, wherein the permanent magnet films are paired and connected to both ends of the magnetoresistive elements, so that an X-axis magnetic sensor and a Y-axis magnetic sensor are realized by adequately arranging the GMR elements relative to the four sides of the quartz substrate. Herein, the magnetization direction of the pinned layer of the magnetoresistive element forms a prescribed angle of 45° relative to the longitudinal direction of the magnetoresistive element or relative to the magnetization direction of the permanent magnet film. Thus, it is possible to reliably suppress offset variations of bridge connections of the GMR elements even when an intense magnetic field is applied; and it is therefore possible to noticeably improve the resistant characteristics to an intense magnetic field.

REFERENCES:
patent: 5654854 (1997-08-01), Mallary
patent: 6028730 (2000-02-01), Ishihara
patent: 6633462 (2003-10-01), Adelerhof
patent: 6700760 (2004-03-01), Mao
patent: 6704176 (2004-03-01), Shukh et al.
patent: 6791807 (2004-09-01), Hikami et al.
patent: 6894878 (2005-05-01), Cross
patent: 2002/0015251 (2002-02-01), Ito et al.
patent: 2002/0186516 (2002-12-01), Larson et al.
patent: 2003/0090843 (2003-05-01), Shukh et al.
patent: 2003/0206384 (2003-11-01), Hoshiya et al.
patent: 2004/0000682 (2004-01-01), Chen et al.
patent: 2004/0047089 (2004-03-01), Singleton et al.
patent: 2004/0141257 (2004-07-01), Hasegawa et al.
patent: 2004/0160220 (2004-08-01), Wendt
patent: 2004/0246632 (2004-12-01), Nishioka et al.
patent: 2005/0270020 (2005-12-01), Peczalski et al.
patent: 2006/0007604 (2006-01-01), Terunuma et al.
patent: 905 523 (1949-07-01), None
patent: 196 49 265 (1998-06-01), None
patent: 197 42 366 (1999-05-01), None
patent: 05-126577 (1993-05-01), None
patent: 2000-338211 (2000-12-01), None
patent: 2002-299728 (2002-10-01), None
patent: 2002-0062852 (2002-07-01), None
Copy of Korean Office Action dated Nov. 14, 2005 (and English translation of same).
Copy of English translation of relevant portion of JP 05-126577, no date.
Hill et al., Sensors and Actuators A, vol. 59, pp. 30-37 (1997).
Ron Neale, “Taming the Giant MagnetoResistance (GMR) Effect”, Sensors, Electronic Engineering, pp. 36-40 (Apr. 1996).
Smith et al., “The Growing Role of Solid-State Magnetic Sensing”, pp. 139-149.
Spong et al., “Giant Magnetoresistive Spin Valve Bridge Sensor”, IEEE Transactions on Magnetics, vol. 32, No. 2, pp. 366-371 (1996).
Daughton et al., “Magnetic Field Sensors Using GMR Multilayer”, IEEE Transactions on Magnetics, vol. 30, No. 6, pp. 4608-4610 (1994).

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