Patents by Inventor Hiromichi Umehara
Hiromichi Umehara 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).
-
Patent number: 11971461Abstract: A magnetic sensor includes an insulating layer including a protruding surface, a first MR element, and a second MR element. The protruding surface includes a first curved surface portion. The first curved surface portion includes a first portion including an upper end portion of the protruding surface, and a second portion continuous with the first portion at a position away from the upper end portion of the protruding surface. When the shape of the protruding surface is regarded as a function Z, the mean value of the absolute value of a second derivative Z? of the function Z corresponding to the first portion is smaller than the mean value of the absolute value of the second derivative Z? of the function Z corresponding to the second portion.Type: GrantFiled: September 15, 2022Date of Patent: April 30, 2024Assignee: TDK CORPORATIONInventors: Hiromichi Umehara, Kenzo Makino, Masachika Hashino
-
Publication number: 20240094313Abstract: A magnetic sensor includes an insulating layer, a first MR element, and a second MR element. The insulating layer includes a first layer and a second layer, and also includes first and second inclined surfaces formed across the first layer and the second layer. Each of the first and second MR elements includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer of the first MR element are disposed on the first inclined surface. The magnetization pinned layer and the free layer of the second MR element are disposed on the second inclined surface.Type: ApplicationFiled: November 30, 2023Publication date: March 21, 2024Applicant: TDK CorporationInventors: Hiromichi UMEHARA, Keita KAWAMORI, Kenzo MAKINO, Masachika HASHINO
-
Publication number: 20240094312Abstract: A magnetic sensor includes a substrate including a top surface; an insulating layer disposed on the substrate, the insulating layer including first and second inclined surfaces each inclined with respect to the top surface of the substrate; and an MR element structure. An MR element is disposed on the first inclined surface or the second inclined surface. The MR element includes a bottom surface facing the first inclined surface or the second inclined surface, a top surface, and a first surface connecting the bottom surface and the top surface and including two steps.Type: ApplicationFiled: November 30, 2023Publication date: March 21, 2024Applicant: TDK CORPORATIONInventors: Hidekazu KOJIMA, Hiromichi Umehara
-
Patent number: 11874346Abstract: A magnetic sensor includes a substrate including a top surface; an insulating layer disposed on the substrate, the insulating layer including first and second inclined surfaces each inclined with respect to the top surface of the substrate; and an MR element structure. An MR element is disposed on the first inclined surface or the second inclined surface. The MR element includes a bottom surface facing the first inclined surface or the second inclined surface, a top surface, and a first surface connecting the bottom surface and the top surface and including two steps.Type: GrantFiled: September 19, 2022Date of Patent: January 16, 2024Assignee: TDK CORPORATIONInventors: Hidekazu Kojima, Hiromichi Umehara
-
Patent number: 11867779Abstract: A magnetic sensor includes an insulating layer, a first MR element, and a second MR element. The insulating layer includes a first layer and a second layer, and also includes first and second inclined surfaces formed across the first layer and the second layer. Each of the first and second MR elements includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer of the first MR element are disposed on the first inclined surface. The magnetization pinned layer and the free layer of the second MR element are disposed on the second inclined surface.Type: GrantFiled: September 15, 2022Date of Patent: January 9, 2024Assignee: TDK CORPORATIONInventors: Hiromichi Umehara, Keita Kawamori, Kenzo Makino, Masachika Hashino
-
Publication number: 20230095583Abstract: 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 to the respective resistor sections. Each of the first to fourth areas includes a first and a second end edge located at both ends in a first reference direction, and a third and a fourth end edge located at both ends in a second reference direction. An angle that each of the plurality of protruding surfaces forms with respect to the first end edge or the second end edge is larger than an angle that each of the plurality of protruding surfaces forms with respect to the third end edge or the fourth end edge.Type: ApplicationFiled: September 20, 2022Publication date: March 30, 2023Applicant: TDK CORPORATIONInventors: Keita KAWAMORI, Hiromichi UMEHARA
-
Publication number: 20230090999Abstract: A magnetic sensor includes an insulating layer including a protruding surface, a first MR element, and a second MR element. The protruding surface includes a first curved surface portion. The first curved surface portion includes a first portion including an upper end portion of the protruding surface, and a second portion continuous with the first portion at a position away from the upper end portion of the protruding surface. When the shape of the protruding surface is regarded as a function Z, the mean value of the absolute value of a second derivative Z? of the function Z corresponding to the first portion is smaller than the mean value of the absolute value of the second derivative Z? of the function Z corresponding to the second portion.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hiromichi UMEHARA, Kenzo MAKINO, Masachika HASHINO
-
Publication number: 20230086730Abstract: A magnetic sensor includes an insulating layer, a first MR element, and a second MR element. The insulating layer includes a protruding surface including first and second inclined surfaces. Each of the first and second MR elements includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer of the first MR element are disposed on the first inclined surface. The magnetization pinned layer and the free layer of the second MR element are disposed on the second inclined surface. The dimension of the protruding surface in a direction parallel to the Z direction is in the range of 1.4 µm to 3.0 µm.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hiromichi UMEHARA, Keita KAWAMORI, Kenzo MAKINO, Masachika HASHINO
-
Publication number: 20230092845Abstract: A magnetic sensor includes an insulating layer including a flat portion and a protruding portion, a first MR element, and a second MR element. The protruding portion includes a first inclined surface and a second inclined surface. The first MR element is disposed on the first inclined surface. The second MR element is disposed on the second inclined surface. The protruding portion extends in a first direction parallel to a top surface of a substrate, and includes a plurality of recess portions each recessed in a direction parallel to the top surface of the substrate at an end of the protruding portion in the first direction.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hiromichi UMEHARA, Keisuke TAKASUGI, Takehiro ISODA, Kenji INAGE
-
Publication number: 20230091757Abstract: A magnetic sensor includes an insulating layer, a coil element disposed on the insulating layer, and a first insulating film. The insulating layer includes a first inclined surface and a second inclined surface. The coil element includes a first side surface and a second side surface. The first side surface includes a first portion and a second portion, the second portion being disposed at a position farther from a top surface of a substrate than a position where the first portion is disposed. The first portion is inclined so as to intersect with the first and second inclined surfaces, and is also inclined so as to be closer to the second side surface at positions closer to the top surface of the substrate. The first insulating film covers the first portion.Type: ApplicationFiled: September 19, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Keita KAWAMORI, Hiraku HIRABAYASHI, Hiromichi UMEHARA
-
Publication number: 20230093358Abstract: A magnetic sensor includes a substrate including a top surface, an insulating layer including an inclined surface, an MR element disposed on the inclined surface, a first insulating portion of an insulating material disposed on a part of the MR element, and a second insulating portion of an insulating material disposed on another part of the MR element at a position forward of the first insulating portion in a direction along the inclined surface, the direction being a direction away from the top surface of the substrate.Type: ApplicationFiled: September 19, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hidekazu KOJIMA, Hiromichi UMEHARA
-
Publication number: 20230088495Abstract: A magnetic sensor includes a substrate including a top surface; an insulating layer disposed on the substrate, the insulating layer including first and second inclined surfaces each inclined with respect to the top surface of the substrate; and an MR element structure. An MR element is disposed on the first inclined surface or the second inclined surface. The MR element includes a bottom surface facing the first inclined surface or the second inclined surface, a top surface, and a first surface connecting the bottom surface and the top surface and including two steps.Type: ApplicationFiled: September 19, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hidekazu KOJIMA, Hiromichi UMEHARA
-
Publication number: 20230089065Abstract: A magnetic sensor includes an insulating layer including a protruding surface, a first MR element, and a second MR element. The first MR element is disposed on a first inclined surface of the protruding surface. The second MR element is disposed on a second inclined surface of the protruding surface. The protruding surface includes first to third curved surface portions. Each of the second and third curved surface portions is a curved surface protruding in a direction closer to the top surface of the substrate.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hiromichi UMEHARA, Kenzo MAKINO, Masachika HASHINO
-
Publication number: 20230086267Abstract: A magnetic sensor includes an insulating layer, a first MR element, and a second MR element. The insulating layer includes a first layer and a second layer, and also includes first and second inclined surfaces formed across the first layer and the second layer. Each of the first and second MR elements includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer of the first MR element are disposed on the first inclined surface. The magnetization pinned layer and the free layer of the second MR element are disposed on the second inclined surface.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Applicant: TDK CORPORATIONInventors: Hiromichi UMEHARA, Keita KAWAMORI, Kenzo MAKINO, Masachika HASHINO
-
Patent number: 8908328Abstract: A perpendicular magnetic write head includes: a magnetic pole having an end surface exposed on an air bearing surface, and extending in a height direction perpendicular to the air bearing surface; a first yoke having an end surface exposed on the air bearing surface, and facing a forward section of the magnetic pole with a gap layer in between; a second yoke located behind the first yoke with an insulating layer in between in the height direction, and connected to a backward section of the magnetic pole; a shield connecting the first yoke to the second yoke; and an additional magnetic layer located behind a boundary between the first yoke and the insulating layer, and in contact with the first yoke.Type: GrantFiled: October 4, 2012Date of Patent: December 9, 2014Assignee: TDK CorporationInventors: Masahiro Saito, Norikazu Ota, Hiromichi Umehara, Masachika Hashino
-
Publication number: 20140098441Abstract: A perpendicular magnetic write head includes: a magnetic pole having an end surface exposed on an air bearing surface, and extending in a height direction perpendicular to the air bearing surface; a first yoke having an end surface exposed on the air bearing surface, and facing a forward section of the magnetic pole with a gap layer in between; a second yoke located behind the first yoke with an insulating layer in between in the height direction, and connected to a backward section of the magnetic pole; a shield connecting the first yoke to the second yoke; and an additional magnetic layer located behind a boundary between the first yoke and the insulating layer, and in contact with the first yoke.Type: ApplicationFiled: October 4, 2012Publication date: April 10, 2014Applicant: TDK CORPORATIONInventors: Masahiro SAITO, Norikazu OTA, Hiromichi UMEHARA, Masachika HASHINO
-
Patent number: 8654479Abstract: A thin film magnetic recording head having a multilayer structure in which plural thin films are laminated and being a perpendicular recording type that applies a magnetic field perpendicularly to a magnetic recording medium and performs recording, includes a main magnetic pole exposed on an air bearing surface facing the magnetic recording medium and guiding a magnetic flux toward the magnetic recording medium, a thin film positioned beneath the main magnetic pole from a perspective of a lamination direction and configuring a sensor or a heater configured to determine a distance from the magnetic recording medium of the thin film magnetic recording head, and a light-absorbing portion positioned between the main magnetic pole and the thin film.Type: GrantFiled: June 28, 2012Date of Patent: February 18, 2014Assignee: TDK CorporationInventors: Masashi Sano, Hiromichi Umehara, Mutsumi Fujita, Isamu Toba, Tatsuhiro Nojima, Hitoshi Hatate, Hisayoshi Watanabe
-
Publication number: 20140002921Abstract: A thin film magnetic recording head having a multilayer structure in which plural thin films are laminated and being a perpendicular recording type that applies a magnetic field perpendicularly to a magnetic recording medium and performs recording, includes a main magnetic pole exposed on an air bearing surface facing the magnetic recording medium and guiding a magnetic flux toward the magnetic recording medium, a thin film positioned beneath the main magnetic pole from a perspective of a lamination direction and configuring a sensor or a heater configured to determine a distance from the magnetic recording medium of the thin film magnetic recording head, and a light-absorbing portion positioned between the main magnetic pole and the thin film.Type: ApplicationFiled: June 28, 2012Publication date: January 2, 2014Applicant: TDK CorporationInventors: Masashi SANO, Hiromichi Umehara, Mutsumi Fujita, Isamu Toba, Tatsuhiro Nojima, Hitoshi Hatate, Hisayoshi Watanabe
-
Publication number: 20130286507Abstract: A thin-film magnetic head has a high write performance because its shape is smooth without roughness. The thin-film magnetic head includes a slider substrate, a write element and an antireflection film. The slider substrate has an air bearing surface at one side and supports a first support layer. The first support layer has a leading shield, and the leading shield has a low-level flat part, a slope part and a high-level flat part continuously arranged at one side in the recited order toward the air bearing surface. The antireflection film entirely covers the low-level flat part, the slope part and the high-level flat part of the leading shield. The write element has a recording magnetic pole film, and the recording magnetic pole film is formed above the antireflection film.Type: ApplicationFiled: April 30, 2012Publication date: October 31, 2013Applicant: TDK CorporationInventors: Hiromichi Umehara, Masashi Sano, Atsushi Yamaguchi
-
Patent number: 8564905Abstract: A thin-film magnetic head has a high write performance because its shape is smooth without roughness. The thin-film magnetic head includes a slider substrate, a write element and an antireflection film. The slider substrate has an air bearing surface at one side and supports a first support layer. The first support layer has a leading shield, and the leading shield has a low-level flat part, a slope part and a high-level flat part continuously arranged at one side in the recited order toward the air bearing surface. The antireflection film entirely covers the low-level flat part, the slope part and the high-level flat part of the leading shield. The write element has a recording magnetic pole film, and the recording magnetic pole film is formed above the antireflection film.Type: GrantFiled: April 30, 2012Date of Patent: October 22, 2013Assignee: TDK CorporationInventors: Hiromichi Umehara, Masashi Sano, Atsushi Yamaguchi