Patents by Inventor Hideaki Fukuzawa
Hideaki Fukuzawa 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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Publication number: 20230304855Abstract: An optical device includes a magnetic element and a light application part, wherein the light application part configured to apply light to the magnetic element, the magnetic element includes a first ferromagnetic layer to which the light is applied, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and magnetization of the first ferromagnetic layer is inclined with respect to both an in-plane direction in which the first ferromagnetic layer extends and a surface-perpendicular direction perpendicular to a surface on which the first ferromagnetic layer extends in a state in which the light is not applied from the light application part to the magnetic element.Type: ApplicationFiled: March 27, 2023Publication date: September 28, 2023Applicant: TDK CORPORATIONInventors: Takekazu YAMANE, Tetsuya SHIBATA, Tomohito MIZUNO, Hideaki FUKUZAWA
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Publication number: 20230304856Abstract: A receiving device includes a magnetic element having a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, wherein the first ferromagnetic layer is configured to be irradiated with light containing an optical signal with a change of intensity of the light, and wherein the receiving device is configured to receive the optical signal on a basis of an output voltage from the magnetic element.Type: ApplicationFiled: June 5, 2023Publication date: September 28, 2023Applicant: TDK CORPORATIONInventors: Hideaki FUKUZAWA, Tomohito MIZUNO, Tetsuya SHIBATA
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Publication number: 20230301196Abstract: This optical device includes a light-emitting unit that is configured to emit a light; a first magnetic element; and a circuit, wherein the first magnetic element includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, a reflected light reflected by an object to be irradiated with the light is applied to the first magnetic element, a first signal corresponding to an emission of the light from the light-emitting unit is input to the circuit, and a second signal corresponding to an application of the reflected light to the first magnetic element is input from the first magnetic element to the circuit.Type: ApplicationFiled: February 10, 2023Publication date: September 21, 2023Applicant: TDK CORPORATIONInventors: Tomohito MIZUNO, Hideaki FUKUZAWA, Tetsuya SHIBATA
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Publication number: 20230247913Abstract: This light detection element includes a meta-lens that includes nanostructures which are two-dimensionally arranged; and a magnetic element that includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer. Light which passes through the meta-lens is applied to the magnetic element.Type: ApplicationFiled: December 6, 2022Publication date: August 3, 2023Applicant: TDK CORPORATIONInventors: Nobutaka NISHIO, Tetsuya SHIBATA, Tomohito MIZUNO, Hideaki FUKUZAWA
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Publication number: 20230229056Abstract: A light source unit (1000) of the present disclosure includes a light source part (100), a first electrical signal generating device (40-1) configured to control current that drives an optical semiconductor device (30), an optical modulator (200) having a Mach-Zehnder type optical waveguide (10) and an electrode configured to apply an electric field to the optical waveguide (10), and a second electrical signal generating device (40-2) configured to control a voltage that operates the optical modulator (200), the first electrical signal generating device (40-1) and the second electrical signal generating device (40-2) are synchronizably connected to each other, and intensity of light emitted from the optical modulator (200) is changed by the current controlled by the first electrical signal generating device (40-1) and the voltage controlled by the second electrical signal generating device (40-2).Type: ApplicationFiled: January 17, 2023Publication date: July 20, 2023Applicant: TDK CORPORATIONInventors: Hideaki FUKUZAWA, Joji OKADA, Takashi KIKUKAWA, Tsuyoshi KOMAKI
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Publication number: 20230194913Abstract: The light detection element includes a light-sensitive layer configured to generate a voltage when light is applied, a first electrode, and a second electrode. The light-sensitive layer is located between the first electrode and the second electrode. The second electrode is a metal containing at least one element selected from the group consisting of ruthenium, molybdenum, and tungsten.Type: ApplicationFiled: December 1, 2022Publication date: June 22, 2023Applicant: TDK CORPORATIONInventors: Tomohito MIZUNO, Hideaki FUKUZAWA, Tetsuya SHIBATA
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Publication number: 20230097100Abstract: The optical device includes a magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and a laser diode. At least a part of light emitted from the laser diode is applied to the magnetic element.Type: ApplicationFiled: September 7, 2022Publication date: March 30, 2023Applicant: TDK CORPORATIONInventors: Tetsuya SHIBATA, Hideaki FUKUZAWA, Tomohito MIZUNO, Masahiro SHINKAI
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Publication number: 20230068608Abstract: A retinal projection display system includes at least one visible light source for projecting a visible light image, an infrared light source for projecting infrared light, a scanning mirror having a field of view larger than the visible light image, a reflective surface on which the visible light image is projected and on which the infrared light is reflected at least partially towards an eye of a user, wherein the reflective surface is larger than the visible light image, at least one infrared photodetector for receiving reflected infrared light that reflects off of the eye of the user, and a hardware computation module comprising a processor and a memory, the hardware computation module configured to determine a gaze direction of the user based at least in part on the reflected infrared light.Type: ApplicationFiled: August 26, 2022Publication date: March 2, 2023Applicant: InvenSense, Inc.Inventors: Ardalan HESHMATI, Hideaki FUKUZAWA
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Publication number: 20230054450Abstract: A retinal projection display system includes a light source for projecting an image, a scanning mirror having a field of view larger than the image, and a reflective surface on which the image is projected, wherein the reflective surface is larger than the image. The scanning mirror projects the image onto a viewable region of the reflective surface such that the image is projected into a retina of a user.Type: ApplicationFiled: August 18, 2022Publication date: February 23, 2023Applicant: InvenSense, Inc.Inventors: Ardalan HESHMATI, Hideaki FUKUZAWA
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Publication number: 20220416096Abstract: A light detection element includes: a plurality of magnetic elements, wherein each of the magnetic elements includes a first ferromagnetic layer that is irradiated with light and a second ferromagnetic layer and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, and wherein at least two of the magnetic elements are arranged to be inside a spot of the light applied to the first ferromagnetic layers of the at least two of the magnetic elements.Type: ApplicationFiled: June 21, 2022Publication date: December 29, 2022Applicant: TDK CORPORATIONInventors: Takekazu YAMANE, Hideaki FUKUZAWA, Tetsuya SHIBATA, Tomohito MIZUNO
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Publication number: 20220382181Abstract: A integrated light source module includes a planar optical waveguides layer having N light incident ports aligned with respect to each other, M light exit ports aligned with respect to each other, and optical waveguides connected to the N light incident ports and the M light exit ports, and N optical semiconductor devices facing each of the N light incident ports arranged so that light emitted from each of the N optical semiconductor devices can be incident on each of the N light incident ports, wherein light emitted from the M light exit ports can be applied to an object to be irradiated.Type: ApplicationFiled: May 27, 2022Publication date: December 1, 2022Applicant: TDK CORPORATIONInventors: Kuniyasu ITO, Tsuyoshi KOMAKI, Hideaki FUKUZAWA
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Publication number: 20220317484Abstract: An optical device that includes at least one magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer; a substrate; and a waveguide is provided, wherein the waveguide and the magnetic element are located on or above the substrate, and wherein at least some of light propagating in the waveguide is applied to the magnetic element.Type: ApplicationFiled: March 15, 2022Publication date: October 6, 2022Applicant: TDK CORPORATIONInventors: Tetsuya SHIBATA, Hideaki FUKUZAWA, Takashi KIKUKAWA, Tomohito MIZUNO
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Publication number: 20220317397Abstract: This optical device includes at least one magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, a laser diode, and a waveguide, in which the waveguide includes at least one input waveguide optically connected to the laser diode and an output waveguide connected to the input waveguide, and at least some of light propagating in at least one of the input waveguide and the output waveguide is applied to the magnetic element.Type: ApplicationFiled: March 14, 2022Publication date: October 6, 2022Applicant: TDK CORPORATIONInventors: Tetsuya SHIBATA, Hideaki FUKUZAWA, Tomohito MIZUNO, Masahiro SHINKAI
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Publication number: 20220208820Abstract: An optical sensor includes a wavelength filter configured to transmit light in a specific wavelength range and a magnetic element including a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer. The light passing through the wavelength filter is applied to the magnetic element and the light applied to the magnetic element is detected.Type: ApplicationFiled: December 22, 2021Publication date: June 30, 2022Applicant: TDK CORPORATIONInventors: Hideaki FUKUZAWA, Dai MATSUOKA, Tomohito MIZUNO, Tetsuya SHIBATA
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Publication number: 20220178741Abstract: A receiving device includes a magnetic element having a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, wherein the first ferromagnetic layer is configured to be irradiated with light containing an optical signal with a change of intensity of the light, and wherein the receiving device is configured to receive the optical signal on a basis of an output voltage from the magnetic element.Type: ApplicationFiled: October 21, 2021Publication date: June 9, 2022Applicant: TDK CORPORATIONInventors: Hideaki FUKUZAWA, Tomohito MIZUNO, Tetsuya SHIBATA
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Publication number: 20220131020Abstract: An electrode structure includes: a metal film with an opening formed in a part of the metal film; and a transparent conductive film disposed in the opening, wherein the transparent conductive film is electronically connected to an element and overlaps with the element as viewed in a plan view in a thickness direction of the transparent conductive film.Type: ApplicationFiled: October 25, 2021Publication date: April 28, 2022Applicant: TDK CORPORATIONInventors: Tomohito MIZUNO, Takekazu YAMANE, Hideaki FUKUZAWA, Tetsuya SHIBATA
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Publication number: 20220131612Abstract: A transceiver device includes: a receiving device including a magnetic element having a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, wherein the receiving device is configured to receive an optical signal; a transmission device including a modulated light output element, wherein the transmission device is configured to transmit an optical signal; and a circuit chip including an integrated circuit electrically connected to the magnetic element and the modulated light output element.Type: ApplicationFiled: October 21, 2021Publication date: April 28, 2022Applicant: TDK CORPORATIONInventors: Hideaki FUKUZAWA, Tomohito MIZUNO, Tetsuya SHIBATA, Takashi KIKUKAWA
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Publication number: 20220068537Abstract: A photodetection element includes: a first ferromagnetic layer configured to be irradiated with light; a second ferromagnetic layer; and a spacer layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, wherein the first ferromagnetic layer includes a first region in contact with the spacer layer and a second region disposed in a position farther from the space layer than the first region, the first region is made of CoFeB alloy, and the second region is a magnetic material containing Fe and Gd as major constituent elements.Type: ApplicationFiled: October 22, 2021Publication date: March 3, 2022Applicant: TDK CORPORATIONInventors: Tomohito MIZUNO, Hideaki FUKUZAWA, Tetsuya SHIBATA
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Publication number: 20220060260Abstract: A transmission device of the present disclosure is a transmission device that transmits a visible light signal to a receiving device, and includes a laser light source configured to emit visible light, and an optical modulator configured to change intensity of the visible light and generate a visible light signal, in which the optical modulator has an optical waveguide that serves as a transmission path for the visible light, and the optical waveguide is formed of a material containing lithium niobate.Type: ApplicationFiled: August 23, 2021Publication date: February 24, 2022Applicant: TDK CORPORATIONInventors: Hideaki FUKUZAWA, Takashi KIKUKAWA, Masahiro SHINKAI, Hiroki HARA
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Publication number: 20210375343Abstract: A perpendicularly magnetized magnetic tunnel junction (p-MTJ) is disclosed wherein a free layer (FL) has a first interface with a MgO tunnel barrier, a second interface with a Mo or W Hk enhancing layer, and is comprised of FexCoyBz wherein x is 66-80, y is 5-9, z is 15-28, and (x+y+z)=100 to simultaneously provide a magnetoresistive ratio >100%, resistance x area product <5 ohm/?m2, switching voltage <0.15V (direct current), and sufficient Hk to ensure thermal stability to 400° C. annealing. The FL may further comprise one or more M elements such as O or N to give (FexCoyBz)wM100-w where w is >90 atomic %. Alternatively, the FL is a trilayer with a FeB layer contacting MgO to induce Hk at the first interface, a middle FeCoB layer for enhanced magnetoresistive ratio, and a Fe or FeB layer adjoining the Hk enhancing layer to increase thermal stability.Type: ApplicationFiled: August 9, 2021Publication date: December 2, 2021Inventors: Hideaki Fukuzawa, Vignesh Sundar, Yu-Jen Wang, Ru-Ying Tong