Tdk Corporation

Sae Magnetics (h.k.) Limited

Other

Norikazu Ota

Hiraku Hirabayashi

Tetsuya Roppongi

Kenzo Makino

Tetsuro Sasaki

Nobuya Oyama

Soji Koide

Yuichi Watabe

Takashi Honda

Takeshi Wada

Naoto Matono

Susumu Aoki

Yasuyuki Notsuke

Masashi Shiraishi

Katsuki Kurihara

Kazuya Watanabe

Noboru Yamanaka

Taro Oike

Shinji Hara

Masahiro Saito

Tsuyoshi Umehara

Kenkichi Anagawa

Takafumi Kobayashi

Hiroki Matsukuma

Mitsuyoshi Kawai

Reiichi Kurumisawa

Koji Shimazawa

Daisuke Miyauchi

Kei Hirata

Eiji Komura

Takeo Kagami

Katsumichi Tagami

Noriaki Kasahara

Kenji Inage

Shuhei Miyazaki

Yoshiyuki Mizoguchi

Kazuma Yamawaki

Mitsuo Otsuki

Yuki Nishimura

Kazuhide Yamada

Daichi Takano

Kosuke Tanaka

Kazuki Sato

Hiroshi Ikeda

Takehiro Kamigama

Isamu Sato

Kenji Yokoyama

Yoshikazu Soeno

Haruyuki Morita

Yoshiaki Tanaka

Mikio Matsuzaki

Shinichirou Mochizuki

Takamitsu Sakamoto

Tatsuya Harada

Yosuke Antoku

Hiromichi Umehara

Atsushi Matsuo

Osamu Fukuroi

Koichi Otani

Shingo Miyata

Masachika Hashino

Masaya Kato

Hiroaki Kawashima

Takamitsu Tsuna

Tatsuhiro Nojima

Shinji Ichikawa

Kenta Hara

Takao Matsumoto

Hirotaka Gomi

Atsushi Hirose

Osamu Nakada

Takehiro Isoda

Yuji Otsubo

Sohei Horiuchi

Minoru Shinoda

A magnetic field detection apparatus includes a magnetoresistive effect element and a helical coil. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction. The helical coil includes a parallel connection including first and second parts extending in a second axis direction inclined with respect to the first axis direction. The first and second parts are adjacent to each other in a third axis direction and coupled to each other in parallel. The helical coil is wound around the magnetoresistive effect element while extending along the third axis direction. The magnetoresistive effect film overlaps the first and second parts in a fourth axis direction orthogonal to the second and third axis directions. The helical coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in the third axis direction.

Magnetic field detection apparatus and current detection apparatus

A magnetic field detection apparatus includes a magnetoresistive effect element and a coil. The coil includes first and second tier parts opposed to each other in a first axis direction, with the magnetoresistive effect element interposed therebetween. The coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect element in a second axis direction. The first tier part includes first conductors extending in a third axis direction, arranged in the second axis direction and coupled in parallel to each other. The second tier part includes a second conductor or second conductors extending in the third axis direction, the second conductors being arranged in the second axis direction and coupled in parallel to each other. The first conductors each have a width smaller than a width of the second conductor or each of the second conductors.

A magnetic field detection apparatus includes a magnetoresistive effect element and a conductor. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction and including a first end part, a second end part, and an intermediate part between the first and second end parts. The conductor includes a first part and a second part that each extend in a second axis direction inclined with respect to the first axis direction. The conductor is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in a third axis direction orthogonal to the second axis direction. The first part and the second part respectively overlap the first end part and the second end part in a fourth axis direction orthogonal to both of the second axis direction and the third axis direction.

A magnetic sensor includes a plurality of resistor sections each including a plurality of MR elements, and a plurality of protruding surfaces each structured to cause the plurality of MR elements to detect a specific component of a target magnetic field. The plurality of MR elements are disposed dividedly in first to fourth areas corresponding respectively to the plurality of resistor sections. The plurality of protruding surfaces include a structural body extending across at least two of the first to fourth areas.

Magnetic sensor

An MR element includes a first magnetic layer, a second magnetic layer, and a nonmagnetic layer disposed between the first magnetic layer and the second magnetic layer. The first magnetic layer has a magnetic shape anisotropy set in a first reference direction, and has a magnetization whose direction changes depending on an external magnetic field, the magnetization being oriented in a first magnetization direction in a state where the external magnetic field is not applied. The second magnetic layer has a magnetic shape anisotropy set in a second reference direction, and has a magnetization whose direction changes depending on the external magnetic field, the magnetization being oriented in a second magnetization direction in a state where the external magnetic field is not applied.

Magnetoresistive element, magnetoresistive device and magnetic sensor

A magnetic sensor device includes a first detection circuit, a second detection circuit, and a processor. The processor is configured to execute first generation processing for generating a first initial detection value, second generation processing for generating a second initial detection value, first correction processing, second correction processing, and determination processing. The first correction processing is processing for correcting the first initial detection value and updating the first initial detection value. The second correction processing is processing for correcting the second initial detection value and updating the second initial detection value. The processor executes the determination processing after alternately executing the first correction processing and the second correction processing.

Magnetic sensor device

A magnetic sensor device includes at least one magnetic sensor and a support. A center of gravity of an element layout area of the at least one magnetic sensor is deviated from a center of gravity of a reference plane of the support. The at least one magnetic sensor includes four resistor sections constituted by a plurality of magnetoresistive elements. Magnetization of a free layer in each of two of the resistor sections includes a component in a third magnetization direction. The magnetization of a free layer in each of the other two resistor sections includes a component in a fourth magnetization direction opposite to the third magnetization direction.

Magnetic sensor device and magnetic sensor system

A magnetic sensor includes at least one MR element and a coil. The coil includes at least one conductor portion. The at least one conductor portion is each located at a position such that a partial magnetic field generated by the conductor portion is applied to one of the at least one MR element, the one corresponding to the conductor portion, and extends along an imaginary curve curving to protrude in a direction away from the corresponding MR element.

A magnetic field detection apparatus includes a magnetoresistive effect element and a coil. The coil includes first and second tier parts opposed to each other in a first axis direction, with the magnetoresistive dal element interposed therebetween. The coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect element in a second axis direction. The first tier part includes first conductors extending in a third axis direction, arranged in the second axis direction and coupled in parallel to each other. The second tier part includes a second conductor or second conductors extending in the third axis direction, the second conductors being arranged in the second axis direction and coupled in parallel to each other. The first conductor each have a width smaller than a width of the second conductor or each of the second conductors.

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Tokyo, Japan

Norikazu Ota