Patents by Inventor Takayuki Mizuno
Takayuki Mizuno 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: 11977099Abstract: A method for manufacturing a semiconductor device in which probes and the layout of the electrode pads of a test element group (TEG) are associated is provided. As a semiconductor device is miniaturized, a scribe area on a wafer also tends to decrease. Accordingly, it is necessary to reduce the size of a TEG arranged in the scribe area, and efficiently arrange an electrode pad for probe contact. Thus, it is necessary to associate the probes and the layout of the electrode pad. According to the method, a layout of a TEG electrode pad corresponding to a plurality of probes arranged in a fan shape or probes manufactured by Micro Electro Mechanical Systems (MEMS) technology is provided.Type: GrantFiled: February 6, 2018Date of Patent: May 7, 2024Assignee: Hitachi High-Tech CorporationInventors: Tomohisa Ohtaki, Takayuki Mizuno, Ryo Hirano, Toru Fujimura, Shigehiko Kato, Yasuhiko Nara, Katsuo Ohki, Akira Kageyama, Masaaki Komori
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Patent number: 11923321Abstract: A memory die includes dielectric isolation rails embedded within a substrate semiconductor layer, laterally spaced apart along a first horizontal direction, and each laterally extending along a second horizontal direction that is perpendicular to the first horizontal direction, and alternating stacks of insulating layers and electrically conductive layers located over the substrate semiconductor layer. The alternating stacks are laterally spaced apart along the second horizontal direction by line trenches that laterally extend along the first horizontal direction. Arrays of memory stack structures are provided such that each array of memory stack structures among the arrays of memory stack structures vertically extends through a respective alternating stack. Each of the memory stack structures includes a respective vertical stack of memory elements and a respective vertical semiconductor channel.Type: GrantFiled: January 12, 2022Date of Patent: March 5, 2024Assignee: SANDISK TECHNOLOGIES LLCInventors: Shin Sakiyama, Genta Mizuno, Kenzo Iizuka, Takayuki Yokoyama, Toshiyuki Sega
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Publication number: 20240072892Abstract: An optical signal emitting direction control method of a present embodiment includes arranging a transparent member to extend over an underwater space and an in-air space, causing an optical signal to enter the transparent member from the underwater space via a surface of an underwater portion of the transparent member immersed in the underwater space, and causing the optical signal entered the transparent member to be emitted into the in-air space via a surface of an in-air portion of the transparent member exposed to the in-air space.Type: ApplicationFiled: January 5, 2021Publication date: February 29, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kento YOSHIZAWA, Kazumitsu SAKAMOTO, Takeshi KINOSHITA, Etsushi YAMAZAKI, Takayuki MIZUNO, Takuya OHARA
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Publication number: 20240048250Abstract: An aspect of the present invention is a wireless communication device including a water flow generator that controls a shape of a partial region on a water surface, and an emission unit that emits a wave carrying information toward the region.Type: ApplicationFiled: December 16, 2020Publication date: February 8, 2024Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazumitsu SAKAMOTO, Kento YOSHIZAWA, Takeshi KINOSHITA, Etsushi YAMAZAKI, Takayuki MIZUNO, Takuya OHARA
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Patent number: 11888522Abstract: An optical transmission system including: N transmitters, each of the N transmitters being configured to convert one of N electrical signals indicating data sequences different from one another into an optical signal; a signal generator configured to cause N optical splitters to split the N optical signals output from the N transmitters to convert the N optical signals into M optical signals; a multiplexer configured to convert the M optical signals converted by the signal generator into one mode-multiplexed signal that is excitable in at least M modes; a demultiplexer configured to convert the mode-multiplexed signal converted by the multiplexer into M optical signals; M receivers, each of the M receivers being configured to convert one of the M optical signals converted by the demultiplexer into the electrical signal; and a signal detector configured to perform signal separation on the M electrical signals converted by the M receivers to extract the N data sequences.Type: GrantFiled: February 19, 2020Date of Patent: January 30, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki Shibahara, Takayuki Mizuno, Yutaka Miyamoto
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Patent number: 11888281Abstract: There is provided a multimode optical amplifier that provides gain to a plurality of propagation modes of signal light. The multimode optical amplifier includes a multiplexer that multiplexes the signal light and excitation light; an amplifying fiber which has a core that propagates a predetermined plurality of propagation modes of the signal light and a predetermined plurality of propagation modes of the excitation light, and which provides an individual gain value for each of the predetermined propagation modes of the signal light; a wavelength-flattening filter that maintains a constant gain value for a frequency for all predetermined propagation modes of the signal light; and a mode-flattening filter that maintains the gain value at a constant value for a predetermined propagation mode of the signal light for all predetermined propagation modes of the signal light.Type: GrantFiled: July 12, 2019Date of Patent: January 30, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hirotaka Ono, Takayuki Mizuno, Koki Shibahara, Yutaka Miyamoto
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Patent number: 11888584Abstract: An optical transmission system includes a plurality of transmission lines through which a mode-multiplexed signal obtained by multiplexing a plurality of optical signals of different types of modes is transmitted, and one or more mode group permutation units provided between the plurality of transmission lines. The mode group permutation unit changes, on a mode-group-by-mode-group basis, an optical signal of a mode belonging to a mode group to an optical signal of another mode belonging to a mode group after permutation corresponding to the mode group in such a manner that modes are interchanged between at least some of the plurality of optical signals multiplexed into the mode-multiplexed signal input from one of the plurality of transmission lines on an input side, and outputs the mode-multiplexed signal after mode interchange to one of the plurality of transmission lines on an output side.Type: GrantFiled: February 18, 2020Date of Patent: January 30, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki Shibahara, Takayuki Mizuno, Yutaka Miyamoto
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Publication number: 20230421267Abstract: An interference component generated because a plurality of carrier generation units and a plurality of local oscillation units are asynchronous is used as state information, a predetermined state equation for calculating posterior state information on the basis of prior state information, and a transmission data sequence are used as observation information, a Kalman filter algorithm is applied to a predetermined observation equation for calculating the observation information in a state indicated by the posterior state information on the basis of the posterior state information calculated by the state equation, a reception data sequence, and a weight matrix to calculate a posterior state estimate of the interference component, and an estimated sequence of the transmission data sequence from which the interference component has been removed is calculated on the basis of the calculated posterior state estimate.Type: ApplicationFiled: December 21, 2020Publication date: December 28, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki SHIBAHARA, Takayuki MIZUNO, Yutaka MIYAMOTO
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Publication number: 20230397386Abstract: A mounting apparatus includes a lifting and lowering device that lifts and lowers a holding member holding a component with respect to a substrate, a contact detection section that detects contact between the holding member or a component held by the holding member and the substrate, and a control section that sets a mounting height of the component in accordance with a height of the substrate, causes the holding member holding the component to be lowered to the mounting height by the lifting and lowering device, and releases holding of the component to mount the component when the contact is detected, in which the control section acquires a height of the holding member when the holding member is lowered by the lifting and lowering device and the contact is detected, and measures the height of the substrate based on the height of the holding member.Type: ApplicationFiled: November 26, 2020Publication date: December 7, 2023Applicant: FUJI CORPORATIONInventors: Akihiro SENGA, Takayuki MIZUNO
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Patent number: 11770205Abstract: An optical signal processing apparatus of an embodiment is an optical signal processing apparatus for separating and detecting an optical signal transmitted in a mode division multiplexing optical communication method by signal processing based on a multi-input multi-output (MIMO)-type linear filter. The device includes a signal processing unit configured to estimate weighting factors of the MIMO-type linear filter by sequential calculation based on an affine projection method.Type: GrantFiled: September 6, 2019Date of Patent: September 26, 2023Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki Shibahara, Takayuki Mizuno, Yutaka Miyamoto
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Publication number: 20230291479Abstract: A communication device includes: a light output unit for outputting light; a light splitting unit for splitting the light output by the light output unit into a plurality of split beams; and a plurality of spatial optical communication units provided in correspondence to the plurality of split beams, wherein the spatial optical communication units respectively transmit a corresponding split beam which is input from the light splitting unit to a partner communication device across space.Type: ApplicationFiled: June 24, 2020Publication date: September 14, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yohei KATAYAMA, Kazumitsu SAKAMOTO, Kento YOSHIZAWA, Hiroyuki FUKUMOTO, Takuya OHARA, Takeshi KINOSHITA, Etsushi YAMAZAKI, Takayuki MIZUNO
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Publication number: 20230291471Abstract: A phase difference distribution estimation method includes: receiving an optical signal via a space and detecting a phase of the optical signal; calculating characteristic values related to characteristics of the atmosphere through which the optical signal propagates from the optical signal received in the receiving; estimating a phase difference distribution of an optical signal received after a certain period of time, on the basis of the characteristic values calculated in the calculating; and controlling a phase of an optical signal in the receiving on the basis of the phase difference distribution estimated in the estimating.Type: ApplicationFiled: June 23, 2020Publication date: September 14, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yohei KATAYAMA, Kazumitsu SAKAMOTO, Kento YOSHIZAWA, Hiroyuki FUKUMOTO, Takuya OHARA, Takeshi KINOSHITA, Etsushi YAMAZAKI, Takayuki MIZUNO
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Patent number: 11709199Abstract: As a semiconductor device is miniaturized, a scribe area on a wafer also tends to decrease. Accordingly, it is necessary to reduce the size of a TEG arranged in the scribe area, and efficiently arrange an electrode pad for probe contact. Therefore, it is necessary to associate probes and the efficient layout of the electrode pad. The purpose of the present invention is to provide a technique for associating probes and the layout of the electrode pads of a TEG so as to facilitate the evaluation of electrical characteristics. According to an evaluation apparatus for a semiconductor device of the present invention, the above described problems can be solved by providing a plurality of probes arranged in a fan shape or probes manufactured by Micro Electro Mechanical Systems (MEMS) technology.Type: GrantFiled: February 6, 2018Date of Patent: July 25, 2023Assignee: Hitachi High-Tech CorporationInventors: Tomohisa Ohtaki, Takayuki Mizuno, Ryo Hirano, Toru Fujimura, Shigehiko Kato, Yasuhiko Nara, Katsuo Ohki, Akira Kageyama, Masaaki Komori
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Publication number: 20230224036Abstract: A switching instructor outputs a beacon light selection notification signal when a optical transceiver transmits a optical wireless signal of a beacon light and outputs a signal light selection notification signal when the optical transceiver transmits the optical wireless signal of the signal light. A spatial light modulator controller performs switching of a control signal given to each of the plurality of pixels of a spatial light modulator to: cause a phase delay in light received by each of the plurality of pixels of the spatial light modulator when the switching instructor outputs the beacon light selection notification signal and cause a phase delay in light received by each of the plurality of pixels of the spatial light modulator when the switching instructor outputs the signal light selection notification signal.Type: ApplicationFiled: June 15, 2020Publication date: July 13, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazumitsu SAKAMOTO, Yohei KATAYAMA, Kento YOSHIZAWA, Takeshi KINOSHITA, Etsushi YAMAZAKI, Takayuki MIZUNO, Takuya OHARA
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Publication number: 20230216589Abstract: The signal detection device includes the signal detection unit that derives the estimation vector of the transmission signal vector, the first conversion unit that converts the estimation vector of the transmission signal vector to the estimation vector of the transmission signal vector based on the reduced basis, the first determination unit that converts the estimation vector of the transmission signal vector based on the reduced basis to the determination value vector of the transmission signal vector, the first update unit that updates the separation matrix, the second conversion unit that converts the first error signal vector to the second error signal vector based on the reduced basis, the second update unit that updates the error covariance matrix based on the reduced basis, the second determination unit that determines whether or not the predetermined condition is satisfied, and a third update unit that updates the unimodular matrix, the inverse matrix of the unimodular matrix, and the error covarianType: ApplicationFiled: August 20, 2020Publication date: July 6, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki SHIBAHARA, Takayuki MIZUNO, Yutaka MIYAMOTO
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Publication number: 20230208521Abstract: In an optical wireless communication system including: an optical wireless communication apparatus that moves along with a first optical wireless station; and a second optical wireless station opposed to the first optical wireless station, the optical wireless communication apparatus includes at least one reference light transmitting unit that transmits reference light to the second optical wireless station with a position in front in a moving direction of the first optical wireless station defined as a transmission position, the second optical wireless station includes a reference light receiving unit that receives the reference light transmitted from the at least one reference light transmitting unit, an estimation unit that estimates an influence of atmospheric air on transmission of signal light based on a reception state of the reference light received by the reference light receiving unit, a compensation unit that performs compensation processing on the signal light based on the influence of the atmosphType: ApplicationFiled: June 12, 2020Publication date: June 29, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazumitsu SAKAMOTO, Yohei KATAYAMA, Kento YOSHIZAWA, Takeshi KINOSHITA, Etsushi YAMAZAKI, Takayuki MIZUNO, Takuya OHARA
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Patent number: 11625027Abstract: A plurality of hierarchy information management devices include a first hierarchy information management unit managing first hierarchy information in which information on instruments is represented in a hierarchy structure, and each hierarchy information management device manages the first hierarchy information of a different one of the instruments.Type: GrantFiled: February 25, 2020Date of Patent: April 11, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventor: Takayuki Mizuno
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Publication number: 20230057448Abstract: An optical transmission system including: N transmitters, each of the N transmitters being configured to convert one of N electrical signals indicating data sequences different from one another into an optical signal; a signal generator configured to cause N optical splitters to split the N optical signals output from the N transmitters to convert the N optical signals into M optical signals; a multiplexer configured to convert the M optical signals converted by the signal generator into one mode-multiplexed signal that is excitable in at least M modes; a demultiplexer configured to convert the mode-multiplexed signal converted by the multiplexer into M optical signals; M receivers, each of the M receivers being configured to convert one of the M optical signals converted by the demultiplexer into the electrical signal; and a signal detector configured to perform signal separation on the M electrical signals converted by the M receivers to extract the N data sequences.Type: ApplicationFiled: February 19, 2020Publication date: February 23, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki SHIBAHARA, Takayuki MIZUNO, Yutaka MIYAMOTO
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Publication number: 20230054203Abstract: An optical transmission system includes a plurality of transmission lines through which a mode-multiplexed signal obtained by multiplexing a plurality of optical signals of different types of modes is transmitted, and one or more mode group permutation units provided between the plurality of transmission lines. The mode group permutation unit changes, on a mode-group-by-mode-group basis, an optical signal of a mode belonging to a mode group to an optical signal of another mode belonging to a mode group after permutation corresponding to the mode group in such a manner that modes are interchanged between at least some of the plurality of optical signals multiplexed into the mode-multiplexed signal input from one of the plurality of transmission lines on an input side, and outputs the mode-multiplexed signal after mode interchange to one of the plurality of transmission lines on an output side.Type: ApplicationFiled: February 18, 2020Publication date: February 23, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Koki SHIBAHARA, Takayuki MIZUNO, Yutaka MIYAMOTO
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Publication number: 20230051197Abstract: A plurality of hierarchy information management devices include a first hierarchy information management unit managing first hierarchy information in which information on instruments is represented in a hierarchy structure, and each hierarchy information management device manages the first hierarchy information of a different one of the instruments.Type: ApplicationFiled: February 25, 2020Publication date: February 16, 2023Applicant: Mitsubishi Electric CorporationInventor: Takayuki MIZUNO