Magnetic sensor and magnetic encoder

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United States of America Patent

PATENT NO 9810747
APP PUB NO 20160282145A1
SERIAL NO

14996536

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Abstract

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A magnetic sensor is provided with first and second magnetoresistive effect elements that can detect an external magnetic field. The first and second magnetoresistive effect elements include at least magnetization direction change layers where a direction of magnetization is changed according to an external magnetic field. The width W1 of a magnetization direction change layer in an initial magnetization direction of the magnetization direction change layer of the first magnetoresistive effect element, and the width W2 of a magnetization direction change layer in an initial magnetization direction of the magnetization direction change layer of the second magnetoresistive effect element have a relationship shown by formula (1) below. Sensitivity of the first magnetoresistive effect element to the external magnetic field is higher than that of the second magnetoresistive effect element.

description='In-line Formulae' end='lead'W1>W2  (1)description='In-line Formulae' end='tail'

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Patent Owner(s)

  • TDK CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mizoguchi, Yoshiyuki Tokyo, JP 40 802
Ueda, Kunihiro Tokyo, JP 60 548
Watanabe, Suguru Tokyo, JP 59 86
Yamazaki, Hiroshi Tokyo, JP 468 4441

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