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US 2009/0212770 A1Published application
Thin film magnetic sensor
AssigneeDaido Steel Co., Ltd.
InventorShigenobu KOYAMA
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Abstract
The thin film magnetic sensor comprising a GMR film having a Giant Magneto-Resistance effect; and thin film yokes formed of a soft magnetic material connected electrically to both ends of the GMR film; wherein the thin film yoke has a high sensitivity portion with a demagnetizing factor of NL in a magnetic sensitive direction, and a low sensitivity portion with a demagnetizing factor of NH(>NL) in the magnetic sensitive direction, the low sensitivity portion being connected electrically in series with the high sensitivity portion.
Claims20
A thin film magnetic sensor comprising:
- a GMR film having a Giant Magneto-Resistance effect;
- and
- thin film yokes formed of a soft magnetic material connected electrically to both ends of the GMR film;
- wherein the thin film yokes have a high sensitivity portion with a demagnetizing factor of NL in a magnetic sensitive direction, and a low sensitivity portion with a demagnetizing factor of NH(>NL) in the magnetic sensitive direction, the low sensitivity portion being connected electrically in series with the high sensitivity portion.
1 more element
Dependencies are inferred from the claim text.