Patents by Inventor Norikazu Ota
Norikazu Ota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11959943Abstract: 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.Type: GrantFiled: May 26, 2022Date of Patent: April 16, 2024Assignee: TDK CORPORATIONInventors: Norikazu Ota, Kenzo Makino, Hiraku Hirabayashi
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Publication number: 20240110951Abstract: 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.Type: ApplicationFiled: December 13, 2023Publication date: April 4, 2024Applicant: TDK CORPORATIONInventors: Takafumi KOBAYASHI, Norikazu OTA, Kenzo MAKINO
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Patent number: 11946989Abstract: 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.Type: GrantFiled: May 16, 2023Date of Patent: April 2, 2024Assignee: TDK CORPORATIONInventors: Norikazu Ota, Hiraku Hirabayashi, Kazuma Yamawaki, Shuhei Miyazaki, Kazuya Watanabe
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Patent number: 11940506Abstract: 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.Type: GrantFiled: August 5, 2022Date of Patent: March 26, 2024Assignee: TDK CORPORATIONInventors: Kenzo Makino, Norikazu Ota
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Patent number: 11885835Abstract: 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.Type: GrantFiled: July 18, 2022Date of Patent: January 30, 2024Assignee: TDK CORPORATIONInventors: Takafumi Kobayashi, Norikazu Ota, Kenzo Makino
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Publication number: 20230280420Abstract: 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.Type: ApplicationFiled: May 16, 2023Publication date: September 7, 2023Applicant: TDK CORPORATIONInventors: Norikazu OTA, Hiraku HIRABAYASHI, Kazuma YAMAWAKI, Shuhei MIYAZAKI, Kazuya WATANABE
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Patent number: 11686788Abstract: 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.Type: GrantFiled: May 2, 2022Date of Patent: June 27, 2023Assignee: TDK CORPORATIONInventors: Norikazu Ota, Hiraku Hirabayashi, Kazuma Yamawaki, Shuhei Miyazaki, Kazuya Watanabe
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Publication number: 20230103619Abstract: 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.Type: ApplicationFiled: September 29, 2022Publication date: April 6, 2023Applicant: TDK CORPORATIONInventors: Daichi TAKANO, Norikazu OTA, Hiraku HIRABAYASHI, Kazuya WATANABE
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Publication number: 20230099490Abstract: 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.Type: ApplicationFiled: December 8, 2022Publication date: March 30, 2023Applicant: TDK CORPORATIONInventors: Norikazu OTA, Kenzo MAKINO, Hiraku HIRABAYASHI
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Publication number: 20230087727Abstract: 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.Type: ApplicationFiled: September 21, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Takehiro ISODA, Norikazu OTA, Daichi TAKANO, Kenji INAGE
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Publication number: 20230088756Abstract: 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.Type: ApplicationFiled: September 20, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Norikazu OTA, Shinichirou MOCHIZUKI, Kazuya WATANABE, Hiraku HIRABAYASHI
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Publication number: 20230008088Abstract: 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.Type: ApplicationFiled: May 2, 2022Publication date: January 12, 2023Applicant: TDK CORPORATIONInventors: Norikazu OTA, Hiraku HIRABAYASHI, Kazuma YAMAWAKI, Shuhei MIYAZAKI, Kazuya WATANABE
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Patent number: 11549970Abstract: 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.Type: GrantFiled: October 27, 2020Date of Patent: January 10, 2023Assignee: TDK CORPORATIONInventors: Norikazu Ota, Kenzo Makino, Hiraku Hirabayashi
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Publication number: 20220373620Abstract: 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.Type: ApplicationFiled: August 5, 2022Publication date: November 24, 2022Applicant: TDK CORPORATIONInventors: Kenzo MAKINO, Norikazu OTA
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Publication number: 20220349921Abstract: 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.Type: ApplicationFiled: July 18, 2022Publication date: November 3, 2022Applicant: TDK CORPORATIONInventors: Takafumi KOBAYASHI, Norikazu OTA, Kenzo MAKINO
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Patent number: 11467234Abstract: 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.Type: GrantFiled: October 29, 2020Date of Patent: October 11, 2022Assignee: TDK CORPORATIONInventors: Kenzo Makino, Norikazu Ota
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Publication number: 20220308095Abstract: 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.Type: ApplicationFiled: May 26, 2022Publication date: September 29, 2022Applicant: TDK CORPORATIONInventors: Norikazu OTA, Kenzo MAKINO, Hiraku HIRABAYASHI
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Patent number: 11422166Abstract: 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.Type: GrantFiled: March 1, 2021Date of Patent: August 23, 2022Assignee: TDK CORPORATIONInventors: Takafumi Kobayashi, Norikazu Ota, Kenzo Makino
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Patent number: 11372029Abstract: 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.Type: GrantFiled: October 27, 2020Date of Patent: June 28, 2022Assignee: TDK CORPORATIONInventors: Norikazu Ota, Kenzo Makino, Hiraku Hirabayashi
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Publication number: 20210293857Abstract: 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.Type: ApplicationFiled: March 1, 2021Publication date: September 23, 2021Applicant: TDK CORPORATIONInventors: Takafumi KOBAYASHI, Norikazu OTA, Kenzo MAKINO