Patents by Inventor Tetsu Tanaka
Tetsu Tanaka 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: 20170200703Abstract: To miniaturize metal columns. A semiconductor device includes a metal column (14) that extends in a stretching direction; a polymer layer (16) that surrounds the metal column from a direction crossing the stretching direction; and a guide (12) that surrounds the polymer layer in the crossing direction so as to be spaced from the metal column with the polymer layer interposed therebetween. A method for manufacturing semiconductor devices includes a step of filling a mixture (20) containing metal particles (22) and polymers (24) in a guide (12); and a step of subjecting the mixture to a heat treatment so that the polymers agglomerate to the guide to form a polymer layer (16) that makes contact with the guide and the metal particles agglomerate away from the guide with the polymer layer interposed therebetween to form a metal column (14) that stretches in a stretching direction of the guide from the metal particles.Type: ApplicationFiled: March 3, 2017Publication date: July 13, 2017Applicant: TOHOKU UNIVERSITYInventors: Mitsumasa KOYANAGI, Tetsu TANAKA, Takafumi FUKUSHIMA, Kang-Wook LEE
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Patent number: 9449948Abstract: The present invention relates to a chip support substrate including a lyophilic region 4 that is formed on the substrate and that absorbs a chip 3A, and an electrode 6 that is formed on the substrate and in the lyophilic region and that generates electrostatic force in the chip, and to a chip support method including the steps of arranging the chip onto the lyophilic region of the chip support substrate with a liquid 15, the chip support substrate comprising the lyophilic region that is formed on the substrate, and the electrode that is formed on the substrate and in the lyophilic region, and generating the electrostatic force in the chip corresponding to the electrode by applying a voltage to the electrode.Type: GrantFiled: September 13, 2013Date of Patent: September 20, 2016Assignee: TOHOKU UNIVERSITYInventors: Mitsumasa Koyanagi, Tetsu Tanaka, Takafumi Fukushima
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Publication number: 20150228622Abstract: The present invention relates to a chip support substrate including a lyophilic region 4 that is formed on the substrate and that absorbs a chip 3A, and an electrode 6 that is formed on the substrate and in the lyophilic region and that generates electrostatic force in the chip, and to a chip support method including the steps of arranging the chip onto the lyophilic region of the chip support substrate with a liquid 15, the chip support substrate comprising the lyophilic region that is formed on the substrate, and the electrode that is formed on the substrate and in the lyophilic region, and generating the electrostatic force in the chip corresponding to the electrode by applying a voltage to the electrode.Type: ApplicationFiled: September 13, 2013Publication date: August 13, 2015Applicant: TOHOKU UNIVERSITYInventors: Mitsumasa Koyanagi, Tetsu Tanaka, Takafumi Fukushima
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Publication number: 20150103423Abstract: There is provided a drive device including a movable body, and a fixing member that supports, with a drive shaft driven by a piezoelectric element expanded and contracted in response to an applied voltage and a sub shaft provided in parallel with the drive shaft, the movable body connected with the drive shaft movably in an axial direction. The movable body includes a rotation regulating member that supports the sub shaft and regulates rotation of the movable body with the drive shaft as a rotation center, and an impact dispersing part that disperses an impact on the piezoelectric element when inclined to the drive shaft.Type: ApplicationFiled: September 22, 2014Publication date: April 16, 2015Inventor: Tetsu TANAKA
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Publication number: 20140293461Abstract: A drive device includes a moving body having a driven portion with an engagement holding portion and an insertion portion, and an element holding portion holding an optical element; a piezoelectric driver having a piezoelectric element and a drive axis that moves the moving body while being inserted into the insertion portion; and a leaf spring being inserted into the insertion portion, being held by the moving body and urging the drive axis to the driven portion in a pressing direction. In a state in which the leaf spring is inserted into the insertion portion, the leaf spring is elastically deformed in the insertion portion by inserting the drive axis which is inserted into the insertion portion, and the drive axis is pressed against the driven portion by the leaf spring, while the leaf spring is engaged with the engagement holding portion and held by the moving body.Type: ApplicationFiled: March 17, 2014Publication date: October 2, 2014Applicant: SONY CORPORATIONInventors: HAJIME NAKAMURA, TOMOYA TAKEI, TOSHIAKI EDAMITSU, YUTAKA MAEDA, TSUTOMU NAITOU, TETSU TANAKA
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Patent number: 8229539Abstract: A brain probe includes: a core probe made from a metal; and n electrode plates attached so as to cover an entire side surface circumference of the core probe and forming n side planes providing an n-angular cross section (n is an integer equal to or greater than 3). Each of the electrode plates is manufactured by a LSI manufacturing process, and provided with at least one electrode and a lead-out wiring extending in a longitudinal direction of a side plane from each of the at least one electrode.Type: GrantFiled: August 11, 2011Date of Patent: July 24, 2012Assignees: Tohoku-Microtec Co., Ltd., Tohoku UniversityInventors: Makoto Motoyoshi, Mitsumasa Koyanagi, Hajime Mushiake, Tetsu Tanaka, Norihiro Katayama
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Patent number: 7826541Abstract: A wireless relay system for relaying a radio signal transmitted from a first wireless station to a second wireless station via a wireless relay apparatus is disclosed. The wireless relay system includes a relay control part for receiving transmission symbols transmitted from the first wireless station and refraining from relaying a portion of the symbols, a pilot signal transmission part for transmitting a pilot signal that is inserted into a section of the portion of the transmission symbols, a coupling loop interference wave estimation part for receiving the pilot signal and estimating a coupling loop interference wave based on the pilot signal, and a coupling loop interference wave cancellation part for subtracting the estimated coupling loop interference wave from a reception signal.Type: GrantFiled: February 18, 2005Date of Patent: November 2, 2010Assignee: NTT DoCoMo, Inc.Inventors: Hiromasa Fujii, Hirohito Suda, Tetsu Tanaka
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Patent number: 7671417Abstract: A memory cell array includes isolated semiconductor regions formed on a supporting insulating substrate, memory cells formed in the respective semiconductor regions, and insulating regions formed so as to insulate the memory cells. Each memory cell formed in a semiconductor region includes a source region, a drain region, a front gate region formed on a gate insulating film formed on one of side surfaces of the semiconductor region such that the source region and the drain region are separated from each other by the front gate region, and a back gate region formed on a gate insulating film formed on an opposite side surface of the semiconductor region such that the source region and the drain region are separated from each other by the back gate region. Each memory cell shares the back gate region with a memory cell adjacent in a row direction.Type: GrantFiled: August 17, 2007Date of Patent: March 2, 2010Assignee: Fujitsu Microelectronics LimitedInventors: Eiji Yoshida, Tetsu Tanaka, Toshihiko Miyashita
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Patent number: 7606531Abstract: A repeating station, a communication apparatus, and an antenna directivity control method are disclosed. The repeating station includes a first antenna group including at least one antenna element, a second antenna group that is different from the first antenna group, the second antenna group including two or more antenna elements adjusted so that radiation in the direction of the first antenna group is reduced, wherein the second antenna group is adjusted such that radiated power in the direction of the first antenna group is reduced.Type: GrantFiled: July 5, 2005Date of Patent: October 20, 2009Assignee: NTT DoCoMo, Inc.Inventors: Takahiro Asai, Tatsuo Furuno, Tetsu Tanaka, Hirohito Suda
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Patent number: 7463673Abstract: A radio relay system is disclosed that is capable of preventing communication degradation in a case where radio signals are relayed using the same frequency band in a mobile communication environment. The radio relay system includes a first radio station, a second radio station, and a radio relay apparatus for relaying a radio signal that is exchanged between the first radio station and the second radio station. The radio relay apparatus includes a phase correction determining unit that determines a phase correction amount of the relayed signal based on channel information pertaining to channels established between the first radio station, the second radio station, and the radio relay apparatus, and a phase correction unit that corrects the relayed signal based on the phase correction amount determined by the phase correction determining unit.Type: GrantFiled: February 15, 2005Date of Patent: December 9, 2008Assignee: NTT DoCoMo, Inc.Inventors: Hiromasa Fujii, Hirohito Suda, Tetsu Tanaka
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Patent number: 7430397Abstract: A radio repeater including at least first and second relay systems, each including a reception antenna configured to receive a radio signal, a loop interference suppressor, connected to the reception antenna, configured to suppress a loop interference signal in the received radio signal from said reception antenna, an amplifier configured to amplify the loop interference-suppressed radio signal from the loop interference suppressors, and a transmission antenna having a polarization characteristic, which is orthogonal to a polarization characteristic of said reception antenna, configured to transmit the output of said amplifier.Type: GrantFiled: November 17, 2004Date of Patent: September 30, 2008Assignee: NTT DoCoMo, Inc.Inventors: Hirohito Suda, Takahiro Asai, Hiromasa Fujii, Tetsu Tanaka
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Patent number: 7345982Abstract: An optical pickup device is provided which includes a double-wavelength objective lens (34) that collects a light beam selectively emitted from a light-emitting/-detecting element (31) that selectively emits a plurality of light beams different in wavelength from each other, and also return light from an optical disk (2), a first diffraction grating (45) that splits the light beam emitted from a light-emitting/-detecting element (31) into three beams including a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts the return light for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects a light-path deviation by diffracting the positive first-order light beam diffracted by the second diffraction grating (46).Type: GrantFiled: November 19, 2002Date of Patent: March 18, 2008Assignee: Sony CorporationInventors: Norio Fukasawa, Junichi Suzuki, Kiyoshi Toyota, Tetsu Tanaka, Satoru Ishii, Takeshi Kubo, Masahiro Saito
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Patent number: 7308752Abstract: An optical pickup apparatus is described which includes a movable unit with an objective lens, a focus servo coil for moving the moveable unit containing the objective lens in the optical-axis direction, and tracking servo coils for moving the moveable unit containing the objective lens in the horizontal directions, and a liquid crystal element disposed for correcting the refractive index. Springs simultaneously provide support for the moveable unit and feed power to the liquid crystal element, the focus servo coil, and the tracking servo coils. A method for making said optical pickup apparatus is described. Two sheets, each having four springs extending across an opening formed by punching, are disposed parallel to each other at a predetermined distance. On these sheets, a fixed unit and a movable unit are formed by insert-molding. Excess portions of the metal sheets are removed, and a through-hole is formed so that connected portions of the wirings, lying side by side, are disconnected.Type: GrantFiled: May 27, 2004Date of Patent: December 18, 2007Assignee: Sony CorporationInventor: Tetsu Tanaka
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Publication number: 20070278578Abstract: A memory cell array includes isolated semiconductor regions formed on a supporting insulating substrate, memory cells formed in the respective semiconductor regions, and insulating regions formed so as to insulate the memory cells. Each memory cell formed in a semiconductor region includes a source region, a drain region, a front gate region formed on a gate insulating film formed on one of side surfaces of the semiconductor region such that the source region and the drain region are separated from each other by the front gate region, and a back gate region formed on a gate insulating film formed on an opposite side surface of the semiconductor region such that the source region and the drain region are separated from each other by the back gate region. Each memory cell shares the back gate region with a memory cell adjacent in a row direction.Type: ApplicationFiled: August 17, 2007Publication date: December 6, 2007Applicant: FUJITSU LIMITEDInventors: Eiji YOSHIDA, Tetsu TANAKA, Toshihiko MIYASHITA
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Patent number: 7180668Abstract: This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-first-order light, a second diffraction grating (46) for diffracting the optical path of a return light beam from an optical disc (2), and a split prism (47) arranged at a position where the minus-first-order light diffracted by the second diffraction grating (46) is incident and adapted for splitting the minus-first-order light into a plurality of light beams. It also has a light receiving unit (35) for acquiring a focusing error signal FE by receiving each return light beam split by the split prism (47) and for acquiring a tracking error signal by receiving return light beams from the optical disc (2) of the plus-first-order light and the minus-first-order light split by the first diffraction grating (45).Type: GrantFiled: March 21, 2005Date of Patent: February 20, 2007Assignee: Sony CorporationInventors: Norio Fukasawa, Junichi Suzuki, Tetsu Tanaka, Takeshi Kubo
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Patent number: 7064900Abstract: An optical pickup device is provided which includes a first diffraction grating (45) that splits a light beam emitted from a light-emitting/-detecting element (31) into a zero-order light beam and positive and negative first-order light beams, a second diffraction grating (46) that diffracts return light from an optical disk (2) for traveling along a light path separate from that of the outgoing light, and a third diffraction grating (47) that corrects the deviation of the light path by diffracting the positive first-order light beam diffracted by the second diffraction grating (46). The light-emitting/-detecting element (31) provides a focusing error signal FE by detecting the negative first-order light beam, and a tracking error signal by detecting return portions of the positive and negative first-order light beams from the first diffraction grating (45).Type: GrantFiled: November 19, 2002Date of Patent: June 20, 2006Assignee: Sony CorporationInventors: Norio Fukasawa, Junichi Suzuki, Kiyoshi Toyota, Tetsu Tanaka, Takeshi Kubo, Masahiro Saito, Satoru Ishii
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Patent number: 6987614Abstract: This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-first-order light, a second diffraction grating (46) for diffracting the optical path of a return light beam from an optical disc (2), and a split prism (47) arranged at a position where the minus-first-order light diffracted by the second diffraction grating (46) is incident and adapted for splitting the minus-first-order light into a plurality of light beams. It also has a light receiving unit (35) for acquiring a focusing error signal FE by receiving each return light beam split by the split prism (47) and for acquiring a tracking error signal by receiving return light beams from the optical disc (2) of the plus-first-order light and the minus-first-order light split by the first diffraction grating (45).Type: GrantFiled: January 15, 2002Date of Patent: January 17, 2006Assignee: Sony CorporationInventors: Norio Fukasawa, Junichi Suzuki, Tetsu Tanaka, Takeshi Kubo
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Publication number: 20060003697Abstract: A repeating station, a communication apparatus, and an antenna directivity control method are disclosed. The repeating station includes a first antenna group including at least one antenna element, a second antenna group that is different from the first antenna group, the second antenna group including two or more antenna elements adjusted so that radiation in the direction of the first antenna group is reduced, wherein the second antenna group is adjusted such that radiated power in the direction of the first antenna group is reduced.Type: ApplicationFiled: July 5, 2005Publication date: January 5, 2006Applicant: NTT DoCoMo, Inc.Inventors: Takahiro Asai, Tatsuo Furuno, Tetsu Tanaka, Hirohito Suda
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Publication number: 20050237918Abstract: A communication apparatus in a radio transmission system in which plural first communication apparatuses sends the same transmission signals and a second communication apparatus receives the transmission signals is disclosed. The communication apparatus functions as one of the plural first communication apparatuses, and the communication apparatus includes: a detection part for detecting a start or a stop of data transmission performed by a first communication apparatus that is different from the communication apparatus; and a guard interval length control part for controlling a guard interval length on the basis of a detection result of the detection part.Type: ApplicationFiled: April 14, 2005Publication date: October 27, 2005Applicant: NTT DoCoMo, Inc.Inventors: Takahiro Asai, Hiromasa Fujii, Tetsu Tanaka, Hirohito Suda
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Publication number: 20050190822Abstract: A wireless relay system for relaying a radio signal transmitted from a first wireless station to a second wireless station via a wireless relay apparatus is disclosed. The wireless relay system includes a relay control part for receiving transmission symbols transmitted from the first wireless station and refraining from relaying a portion of the symbols, a pilot signal transmission part for transmitting a pilot signal that is inserted into a section of the portion of the transmission symbols, a coupling loop interference wave estimation part for receiving the pilot signal and estimating a coupling loop interference wave based on the pilot signal, and a coupling loop interference wave cancellation part for subtracting the estimated coupling loop interference wave from a reception signal.Type: ApplicationFiled: February 18, 2005Publication date: September 1, 2005Applicant: NTT DoCoMo, Inc.Inventors: Hiromasa Fujii, Hirohito Suda, Tetsu Tanaka