Patents by Inventor Takayuki Kawahara
Takayuki Kawahara 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: 10481125Abstract: To a biomolecule measuring apparatus, a semiconductor sensor for detecting ions generated by a reaction between a biomolecular sample and a reagent is set. The semiconductor sensor has a plurality of cells which are arranged on a semiconductor substrate, and each of which detects ions, and a plurality of readout wires. Each of the plurality of cells has an ISFET which has a floating gate and which detects ions, a first MOSFET M2 for amplifying an output from the ISFET, and a second MOSFET M3 which selectively transmits an output from the first MOSFET to a corresponding readout wire R1. Each of the plurality of cells is provided with a third MOSFET M1 which generates hot electrons in the ISFET and which injects a charge to the floating gate of the ISFET. Here, the second MOSFET and the third MOSFET are separately controlled.Type: GrantFiled: October 2, 2014Date of Patent: November 19, 2019Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATIONInventors: Takayuki Kawahara, Yoshimitsu Yanagawa, Naoshi Itabashi, Riichiro Takemura
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Patent number: 10451584Abstract: Provided is a biomolecule measuring device capable of effectively reducing measurement noise occurring when measuring a biomolecule sample using a semiconductor sensor. This biomolecule measuring device generates a trigger to react a sample with a reagent after starting to send the reagent onto the semiconductor sensor that detects ion concentration (see FIG. 7).Type: GrantFiled: November 18, 2013Date of Patent: October 22, 2019Assignee: Hitachi High-Technologies CorporationInventors: Yoshimitsu Yanagawa, Takahide Yokoi, Naoshi Itabashi, Takayuki Kawahara, Sonoko Migitaka, Makiko Yoshida, Takamichi Muramatsu
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Patent number: 9725753Abstract: Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. 1).Type: GrantFiled: May 31, 2011Date of Patent: August 8, 2017Assignee: Hitachi, Ltd.Inventors: Kazuo Ono, Tatsuo Nakagawa, Yoshimitsu Yanagawa, Takayuki Kawahara, Akira Kotabe, Riichiro Takemura
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Publication number: 20160245777Abstract: To a biomolecule measuring apparatus, a semiconductor sensor for detecting ions generated by a reaction between a biomolecular sample and a reagent is set. The semiconductor sensor has a plurality of cells which are arranged on a semiconductor substrate, and each of which detects ions, and a plurality of readout wires. Each of the plurality of cells has an ISFET which has a floating gate and which detects ions, a first MOSFET M2 for amplifying an output from the ISFET, and a second MOSFET M3 which selectively transmits an output from the first MOSFET to a corresponding readout wire R1. Each of the plurality of cells is provided with a third MOSFET M1 which generates hot electrons in the ISFET and which injects a charge to the floating gate of the ISFET. Here, the second MOSFET and the third MOSFET are separately controlled.Type: ApplicationFiled: October 2, 2014Publication date: August 25, 2016Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATIONInventors: Takayuki Kawahara, Yoshimitsu Yanagawa, Naoshi Itabashi, Riichiro Takemura
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Patent number: 9318178Abstract: Since a nonvolatile RAM allows random reading and writing operations, an erasing mode is unnecessary. From the system side, however, it is desirable to have the erasing mode because of its nonvolatile characteristic. Moreover, the erasing operation is desirably carried out at high speed with low power consumption. Therefore, memory cell arrays COA and DTA containing a plurality of memory cells MC each having a magnetoresistive element are provided, a series of data is written to the memory cell arrays COA and DTA, and at the time of erasing, an erasing operation is carried out by writing predetermined data only to the memory cell array COA.Type: GrantFiled: February 2, 2010Date of Patent: April 19, 2016Assignee: Hitachi, Ltd.Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono, Nobuaki Kohinata
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Patent number: 9257483Abstract: There is provided a magnetic memory with using a magnetoresistive effect element of a spin-injection magnetization reversal type, in which a multi-value operation is possible and whose manufacturing and operation are simple. A preferred aim of this is solved by providing two or more magnetoresistive effect elements which are electrically connected in series to each other and by selecting one of the series-connected elements depending on a direction of a current carried in the series-connected elements, a magnitude thereof, and an order of the current thereof for performing the writing operation. For example, it is solved by differentiating plane area sizes of the respective magnetoresistive effect elements which have the same film structure from each other so as to differentiate resistance change amounts caused by respective magnetization reversal and threshold current values required for respective magnetization reversal from each other.Type: GrantFiled: January 13, 2011Date of Patent: February 9, 2016Assignee: Hitachi, Ltd.Inventors: Takashi Ishigaki, Takayuki Kawahara, Riichiro Takemura, Kazuo Ono, Kenchi Ito
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Publication number: 20150362458Abstract: Provided is a biomolecule measuring device capable of effectively reducing measurement noise occurring when measuring a biomolecule sample using a semiconductor sensor. This biomolecule measuring device generates a trigger to react a sample with a reagent after starting to send the reagent onto the semiconductor sensor that detects ion concentration (see FIG. 7).Type: ApplicationFiled: November 18, 2013Publication date: December 17, 2015Inventors: Yoshimitsu YANAGAWA, Takahide YOKOI, Naoshi ITABASHI, Takayuki KAWAHARA, Sonoko MIGITAKA, Makiko YOSHIDA, Takamichi MURAMATSU
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Patent number: 9177628Abstract: An array configuration capable of supplying a necessary and sufficient current in a small area is achieved and a reference cell configuration suitable to temperature characteristics of a TMR element is achieved. In a memory using inversion of spin transfer switching, a plurality of program drivers are arranged separately along one global bit line, and one sense amplifier is provided to one global bit line. A reference cell to which “1” and “0” are programmed is shared by two arrays and a sense amplifier.Type: GrantFiled: August 12, 2014Date of Patent: November 3, 2015Assignee: HITACHI, LTD.Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono
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Publication number: 20150220899Abstract: A commodity data registration apparatus, connected with a checkout apparatus which executes settlement processing of one transaction of the commodity by operations of a customer through network, comprises a specification information determination module for determining specification information for specifying an input commodity; a calculation module for calculating a total amount of one transaction according to sales data based on the specified information; a cash voucher amount input module for inputting a cash voucher amount of one or multiple cash vouchers; a determination module for determining whether or not the input cash voucher amount is greater than the total amount; a change amount calculation module for calculating change amount according to the cash voucher amount and the total amount if the cash voucher amount is greater than the total amount; and a sending module for sending transaction data containing the change amount, the sales data and the total amount to the checkout apparatus.Type: ApplicationFiled: January 30, 2015Publication date: August 6, 2015Inventors: Shinya Namura, Nobuhiro Sugita, Takayuki Kawahara
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Publication number: 20150213425Abstract: In accordance with one embodiment, a commodity data registration apparatus comprises a communication control module configured to control communication with a checkout apparatus connected through a network, an information input module configured to input identification information for identifying various commodities, a specification module configured to specify a commodity based on the identification information upon input of the identification information, a registration module configured to register sales data of the specified commodity indicating the content of one transaction of the commodity, a calculation module configured to calculate a total amount of the one transaction based on the registered sales data if the closing of the one transaction is declared, and a sending module configured to send a checkout data including the registered sales data and the calculated total amount to the checkout apparatus through the communication control module.Type: ApplicationFiled: January 30, 2015Publication date: July 30, 2015Inventors: Shinya Namura, Nobuhiro Sugita, Takayuki Kawahara
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Publication number: 20150036423Abstract: An array configuration capable of supplying a necessary and sufficient current in a small area is achieved and a reference cell configuration suitable to temperature characteristics of a TMR element is achieved. In a memory using inversion of spin transfer switching, a plurality of program drivers are arranged separately along one global bit line, and one sense amplifier is provided to one global bit line. A reference cell to which “1” and “0” are programmed is shared by two arrays and a sense amplifier.Type: ApplicationFiled: August 12, 2014Publication date: February 5, 2015Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono
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Patent number: 8837251Abstract: An array configuration capable of supplying a necessary and sufficient current in a small area is achieved and a reference cell configuration suitable to temperature characteristics of a TMR element is achieved. In a memory using inversion of spin transfer switching, a plurality of program drivers are arranged separately along one global bit line, and one sense amplifier is provided to one global bit line. A reference cell to which “1” and “0” are programmed is shared by two arrays and a sense amplifier.Type: GrantFiled: October 5, 2009Date of Patent: September 16, 2014Assignee: Hitachi, Ltd.Inventors: Takayuki Kawahara, Riichiro Takemura, Kazuo Ono
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Patent number: 8750032Abstract: The disclosed semiconductor recording device achieves multi-valued reading and writing using a spin-injection magnetization-reversal tunneling magnetoresistive element (TMR element). A first current that has at least the same value as that of the element requiring the highest current to reverse the magnetization thereof among a plurality of TMR elements is, in the direction that causes reversal to either a parallel state or an anti-parallel state, applied to a memory cell having the plurality of TMR elements, and then a second current which is in the reverse direction from the first current and of which only the value needed to reverse the magnetoresistance state of at least one TMR element excluding the element requiring the maximum current among the plurality of TMR elements is applied to each, and multi-valued writing is performed.Type: GrantFiled: April 5, 2011Date of Patent: June 10, 2014Assignee: Hitachi, Ltd.Inventors: Takayuki Kawahara, Riichiro Takemura, Takashi Ishigaki, Kiyoo Itoh
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Publication number: 20140154790Abstract: Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. 1).Type: ApplicationFiled: May 31, 2011Publication date: June 5, 2014Applicant: HITACHI, LTD.Inventors: Kazuo Ono, Tatsuo Nakagawa, Yoshimitsu Yanagawa, Takayuki Kawahara, Akira Kotabe, Riichiro Takemura
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Patent number: 8587995Abstract: For example, one memory cell is configured using two memory cell transistors and one phase change element by disposing a plurality of diffusion layers in parallel to a bit-line, disposing gates between the diffusion layers so as to cross the bit-line, disposing bit-line contacts and source contacts alternately to the plurality of diffusion layers arranged in a bit-line direction for each diffusion layer, and providing a phase change element on the source contact. Also, the phase change element can be provided on the bit-line contact instead of the source contact. By this means, for example, increase in drivability of the memory cell transistors and reduction in area can be realized.Type: GrantFiled: December 19, 2012Date of Patent: November 19, 2013Assignee: Renesas Electronics CorporationInventors: Riichiro Takemura, Kenzo Kurotsuchi, Takayuki Kawahara
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Publication number: 20130261413Abstract: To obtain a blood sugar level accurately, the location of a blood-vessel part is specified by using a first wavelength at which absorption by hemoglobin, which is a component unique to blood, is high, and data of light absorbance measured by using a second wavelength at which absorption by glucose is high is separated into a blood-vessel part and other parts.Type: ApplicationFiled: October 14, 2010Publication date: October 3, 2013Applicant: HITACHI, LTD.Inventors: Takayuki Kawahara, Riichiro Takemura, Tsuyoshi Sonehara, Akio Nagasaka
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Patent number: 8508283Abstract: Back-gate voltage control provides a high speed and low power consumption LSI operable in a wide temperature range in which a MOS transistor having back gates is used specifically according to operating characteristics of a circuit. In the LSI, an FD-SOI structure having an embedded oxide film layer is used and a lower semiconductor region of the embedded oxide film layer is used as a back gate. A voltage for back gates in logic circuits having a small load in logic circuit block is controlled in response to activation of the block from outside of the block. Transistors, in which the gate and the back gate are connected to each other, are used for the circuit generating the back gate driving signal, and logic circuits having a heavy load such as circuit block output section, and the back gates are directly controlled according to a gate input signal.Type: GrantFiled: April 6, 2011Date of Patent: August 13, 2013Assignee: Renesas Electronics CorporationInventors: Takayuki Kawahara, Masanao Yamaoka
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Publication number: 20130105760Abstract: For example, one memory cell is configured using two memory cell transistors and one phase change element by disposing a plurality of diffusion layers in parallel to a bit-line, disposing gates between the diffusion layers so as to cross the bit-line, disposing bit-line contacts and source contacts alternately to the plurality of diffusion layers arranged in a bit-line direction for each diffusion layer, and providing a phase change element on the source contact. Also, the phase change element can be provided on the bit-line contact instead of the source contact. By this means, for example, increase in drivability of the memory cell transistors and reduction in area can be realized.Type: ApplicationFiled: December 19, 2012Publication date: May 2, 2013Applicant: Renesas Electronics CorporationInventors: Riichiro TAKEMURA, Kenzo KUROTSUCHI, Takayuki KAWAHARA
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Patent number: 8427864Abstract: To write information on a memory cell of SPRAM formed of an MOS transistor and a tunnel magnetoresistive element, the memory cell is supplied with a current in a direction opposite to a direction of a current required for writing the information on the memory cell, and then, the memory cell is supplied with a current required for writing. In this manner, even when the same information is sequentially written on the memory cell, since the currents in the two directions are caused to flow in pairs in the tunnel magnetoresistive element of the memory cell each time information is rewritten, deterioration of a film that forms the tunnel magnetoresistive element can be suppressed. Therefore, reliability of the SPRAM can be improved.Type: GrantFiled: June 2, 2010Date of Patent: April 23, 2013Assignee: Hitachi, Ltd.Inventors: Takayuki Kawahara, Kiyoo Itoh, Riichiro Takemura, Kenchi Ito
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Publication number: 20130051134Abstract: The disclosed semiconductor recording device achieves multi-valued reading and writing using a spin-injection magnetization-reversal tunneling magnetoresistive element (TMR element). A first current that has at least the same value as that of the element requiring the highest current to reverse the magnetization thereof among a plurality of TMR elements is, in the direction that causes reversal to either a parallel state or an anti-parallel state, applied to a memory cell having the plurality of TMR elements, and then a second current which is in the reverse direction from the first current and of which only the value needed to reverse the magnetoresistance state of at least one TMR element excluding the element requiring the maximum current among the plurality of TMR elements is applied to each, and multi-valued writing is performed.Type: ApplicationFiled: April 5, 2011Publication date: February 28, 2013Inventors: Takayuki Kawahara, Riichiro Takemura, Takashi Ishigaki, Kiyoo Itoh