Assembling method for producing a magnetic sensor with high...

Metal working – Method of mechanical manufacture – Electrical device making

Reexamination Certificate

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C029S417000, C029S603130, C029S603140, C029S846000, C029S850000, C029S854000, C216S022000, C216S048000, C360S316000, C415S005000, C415S041000, C427S127000, C427S128000, C427S131000

Reexamination Certificate

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06920684

ABSTRACT:
The fixed layers of all magnetoresistive elements that are formed on the same substrate are magnetized in the same direction. Chips including magnetoresistive elements are cut out individually from the substrate. A magnetic sensor is assembled by combining cut-out chips together with consideration given to the magnetization directions of the fixed layers of the magnetoresistive elements in the chips. In this manner, the fixed layers of the magnetoresistive elements are magnetized by a sufficiently strong magnetic field for magnetization, whereby an output signal having a large absolute value is obtained from the magnetoresistive elements.

REFERENCES:
patent: 5247278 (1993-09-01), Pant et al.
patent: 5583424 (1996-12-01), Sato et al.
patent: 5805390 (1998-09-01), Takeura
patent: 6452382 (2002-09-01), Tokunaga et al.
patent: 10302203 (1998-11-01), None
patent: 11-505966 (1999-05-01), None
“Index phase output characteristics of magnetic rotary encoder using a magneto-resistive element”; Kikuchi, Y.; Nakamura, F.; Wakiwaka, H.; Yamada, H.; Magnetics, IEEE Transactions on , vol. 33, Issue: 5 , Sep. 1997; pp. 3370-3372.

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