US 12,467,988 B2
Magnetic sensor and camera module
Yohei Hirota, Tokyo (JP); Hayato Miyashita, Tokyo (JP); Tsuyoshi Umehara, Tokyo (JP); and Hiraku Hirabayashi, Tokyo (JP)
Assigned to TDK Corporation, Tokyo (JP)
Filed by TDK Corporation, Tokyo (JP)
Filed on Nov. 14, 2022, as Appl. No. 17/986,136.
Application 17/986,136 is a continuation of application No. 17/212,430, filed on Mar. 25, 2021, granted, now 11,519,978.
Application 17/212,430 is a continuation of application No. 15/992,411, filed on May 30, 2018, granted, now 11,009,567, issued on May 18, 2021.
Claims priority of application No. 2017-113576 (JP), filed on Jun. 8, 2017.
Prior Publication US 2023/0074404 A1, Mar. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 33/09 (2006.01)
CPC G01R 33/093 (2013.01) [G01R 33/096 (2013.01); G01R 33/098 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A magnetic sensor configured to detect a change of an external magnetic field, the magnetic sensor comprising:
a magneto-resistive effect element that generates a magnetic resistance change in accordance with the change of the external magnetic field; and
a pair of bias application elements made of magnetic material that is provided near the magneto-resistive effect element and that applies a bias magnetic field to the magneto-resistive effect element, wherein
each bias application element has an elongated cross section in a plane that is parallel both to the external magnetic field and to the bias magnetic field,
in a projection plane that is parallel to the elongated cross section and onto which the bias application elements and the magneto-resistive effect element are projected, each bias application element includes an element facing side that is opposite to the magneto-resistive effect element and that extends in a longitudinal direction, each bias application element is magnetized in a direction that is perpendicular to the longitudinal direction, and the element facing side is longer than other sides,
each bias application element has a pair of lateral sides that are both connected to the element facing side at an acute angle, and
each bias application element has a cross section in a form of an acute trapezoid in which the element facing side is a longer base of the acute trapezoid.