Patents by Inventor Haruhiro Hasegawa
Haruhiro Hasegawa 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: 7639014Abstract: It is an object of the invention to provide, in a nuclear magnetic resonance spectrometer wherein the direction of the static magnetic field is the horizontal direction, a nuclear magnetic resonance probe coil having a highly uniform magnetic field, which can measure at high sensitivity. The present invention, by selecting the design and shapes of the materials forming the probe coil with a view to suppressing disorder in the magnetic field distribution, and using superconducting thin film coils formed on hollow circular substrates to form a receiver coil and coil support materials having curved surfaces, provides a nuclear magnetic resonance spectrometer of high sensitivity that can improve uniformity of a magnetic field.Type: GrantFiled: October 31, 2007Date of Patent: December 29, 2009Assignee: Hitachi, Ltd.Inventors: Haruhiro Hasegawa, Hiroyuki Yamamoto, Kazuo Saitoh
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Publication number: 20080252294Abstract: It is an object of the invention to provide, in a nuclear magnetic resonance spectrometer wherein the direction of the static magnetic field is the horizontal direction, a nuclear magnetic resonance probe coil having a highly uniform magnetic field, which can measure at high sensitivity. The present invention, by selecting the design and shapes of the materials forming the probe coil with a view to suppressing disorder in the magnetic field distribution, and using superconducting thin film coils formed on hollow circular substrates to form a receiver coil and coil support materials having curved surfaces, provides a nuclear magnetic resonance spectrometer of high sensitivity that can improve uniformity of a magnetic field.Type: ApplicationFiled: October 31, 2007Publication date: October 16, 2008Inventors: Haruhiro Hasegawa, Hiroyuki Yamamoto, Kazuo Saitoh
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Publication number: 20080231277Abstract: The present invention provides a highly-sensitive nuclear magnetic resonance (NMR) spectrometer which achieves a high Q factor using a superconductor, and concurrently which is provided with a probe antenna maintaining the magnetic homogeneity of the static magnetic field in a sample space. An antenna coil is fabricated by using a wire having a superconducting layer formed on the surface of a metal wire.Type: ApplicationFiled: January 23, 2008Publication date: September 25, 2008Inventors: Hiroyuki Yamamoto, Kazuo Saitoh, Haruhiro Hasegawa, Masaya Takahashi, Michiya Okada
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Patent number: 7352186Abstract: Provided is a nuclear magnetic resonance probe coil that is included in a nuclear magnetic resonance apparatus in which the direction of a static magnetic field is horizontal and that can highly sensitively measure multiple nuclear species. A nuclear magnetic resonance apparatus includes a unit that horizontally applies a static magnetic field, a unit that vertically moves a specimen to a predetermined position in the apparatus, and a probe including in the distal part thereof a probe coil that applies a radiofrequency signal to the specimen and that detects a signal produced by the specimen.Type: GrantFiled: May 9, 2007Date of Patent: April 1, 2008Assignee: Hitachi, Ltd.Inventors: Haruhiro Hasegawa, Hiroyuki Yamamoto, Kazuo Saitoh
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Publication number: 20080064605Abstract: A superconducting magnesium diboride (MgB2) thin film showing a high critical current density to an angle of an applied magnetic field for a wide range is provided. Columnar crystal grains of MgB2 grow with the same tilted to the normal line of the substrate by supplying a magnesium (Mg) flux and a boron (B) flux from direction tilted each to the normal axis of a substrate in high vacuum. The superconducting magnesium diboride (MgB2) thin film comprising a plurality of layers containing MgB2 columnar crystal grains with the angle of the grain boundaries being different from each other is formed by controlling the angle of supplying the magnesium (Mg) flux and the boron (B) flux to the substrate.Type: ApplicationFiled: May 9, 2007Publication date: March 13, 2008Inventors: Hiroyuki Yamamoto, Akira Tsukamoto, Haruhiro Hasegawa, Kazuo Saitoh
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Publication number: 20070273379Abstract: Provided is a nuclear magnetic resonance probe coil that is included in a nuclear magnetic resonance apparatus in which the direction of a static magnetic field is horizontal and that can highly sensitively measure multiple nuclear species. A nuclear magnetic resonance apparatus includes a unit that horizontally applies a static magnetic field, a unit that vertically moves a specimen to a predetermined position in the apparatus, and a probe including in the distal part thereof a probe coil that applies a radiofrequency signal to the specimen and that detects a signal produced by the specimen.Type: ApplicationFiled: May 9, 2007Publication date: November 29, 2007Inventors: Haruhiro Hasegawa, Hiroyuki Yamamoto, Kazuo Saitoh
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Patent number: 7173424Abstract: A configuration of an NMR apparatus is provided. In the NMR apparatus, a magnetic field space of higher uniformity is generated by split superconducting magnets. At the same time, it is provided with a cryo probe excellent in cooling capability and sensitivity between two superconducting solenoid coils constructed in very close proximity to each other. For this purpose, a probe coil provided between the two superconducting solenoid coils is so constructed that the following is implemented: a certain distance is ensured between a substrate with a coil formed thereon and another, and the substrates and spacer substrates for cooling are alternately laminated. The spacer substrates are cooled by a cold head of sapphire. When the probe coil is inserted in the same direction as a sample tube (direction perpendicular to the static magnetic field), the spacer substrates cannot be coupled directly by the cold head of sapphire.Type: GrantFiled: August 4, 2005Date of Patent: February 6, 2007Assignee: Hitachi, Ltd.Inventors: Kazuo Saitoh, Haruhiro Hasegawa, Hiroyuki Yamamoto, Hisaaki Ochi, Tsuyoshi Wakuda, Michiya Okada
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Patent number: 7164269Abstract: A solenoid-type probe coil wherein superconductive thin film is used, whose quality factor is high, and which is put in an uniform magnetic field and occupies a small space is provided. For that purpose, the coil is made by piling up, in generally parallel, two or more substrates on which superconductive film is formed and connecting superconductors and normal-metal thin films through capacitance or low contact resistance.Type: GrantFiled: July 26, 2005Date of Patent: January 16, 2007Assignee: Hitachi, Ltd.Inventors: Haruhiro Hasegawa, Hisaaki Ochi, Hiroyuki Yamamoto, Kazuo Saitoh
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Patent number: 7138801Abstract: An NMR probe having a high-sensitivity solenoid probe coil for receiving free induction decay (FID) signals in nuclear magnetic resonance (NMR) spectroscopy, and an NMR spectrometer which incorporates this probe. The solenoid probe coil is fabricated by a building block approach where it mainly consists of coil substrates having superconducting thin film coils made from superconducting thin film thereon, and side holding plates and a wiring substrate with line pattern of superconducting thin films which are both perpendicular to the coil substrates. The superconducting thin film coils are connected with the line patterns of superconducting thin films by capacitive coupling to make the solenoid coil configuration and solenoid probe coil of superconducting material.Type: GrantFiled: July 29, 2005Date of Patent: November 21, 2006Assignee: Hitachi, Ltd.Inventors: Hiroyuki Yamamoto, Kazuo Saitoh, Haruhiro Hasegawa, Hisaaki Ochi
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Publication number: 20060119359Abstract: A solenoid-type probe coil wherein superconductive thin film is used, whose quality factor is high, and which is put in an uniform magnetic field and occupies a small space is provided. For that purpose, the coil is made by piling up, in generally parallel, two or more substrates on which superconductive film is formed and connecting superconductors and normal-metal thin films through capacitance or low contact resistance.Type: ApplicationFiled: July 26, 2005Publication date: June 8, 2006Inventors: Haruhiro Hasegawa, Hisaaki Ochi, Hiroyuki Yamamoto, Kazuo Saitoh
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Publication number: 20060119360Abstract: An NMR probe having a high-sensitivity solenoid probe coil for receiving free induction decay (FID) signals in nuclear magnetic resonance (NMR) spectroscopy, and an NMR spectrometer which incorporates this probe. The solenoid probe coil is fabricated by a building block approach where it mainly consists of coil substrates having superconducting thin film coils made from superconducting thin film thereon, and side holding plates and a wiring substrate with line pattern of superconducting thin films which are both perpendicular to the coil substrates. The superconducting thin film coils are connected with the line patterns of superconducting thin films by capacitive coupling to make the solenoid coil configuration and solenoid probe coil of superconducting material.Type: ApplicationFiled: July 29, 2005Publication date: June 8, 2006Inventors: Hiroyuki Yamamoto, Kazuo Saitoh, Haruhiro Hasegawa, Hisaaki Ochi
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Publication number: 20060033498Abstract: A configuration of an NMR apparatus is provided. In the NMR apparatus, a magnetic field space of higher uniformity is generated by split superconducting magnets. At the same time, it is provided with a cryo probe excellent in cooling capability and sensitivity between two superconducting solenoid coils constructed in very close proximity to each other. For this purpose, a probe coil provided between the two superconducting solenoid coils is so constructed that the following is implemented: a certain distance is ensured between a substrate with a coil formed thereon and another, and the substrates and spacer substrates for cooling are alternately laminated. The spacer substrates are cooled by a cold head of sapphire. When the probe coil is inserted in the same direction as a sample tube (direction perpendicular to the static magnetic field), the spacer substrates cannot be coupled directly by the cold head of sapphire.Type: ApplicationFiled: August 4, 2005Publication date: February 16, 2006Inventors: Kazuo Saitoh, Haruhiro Hasegawa, Hiroyuki Yamamoto, Hisaaki Ochi, Tsuyoshi Wakuda, Michiya Okada
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Patent number: 6725248Abstract: A decimation filter includes a first circuit block for respectively delaying by one clock an input signal synchronized with a clock signal and for producing a plurality of delayed signals, adders for adding or merging by confluence buffers the delayed signals to obtain total signals and for feeding the total signals to one signal line, and a second circuit block for counting pulses of the total signals. The filter provides an analog-to-digital converter which processes signals at a high speed and which is resistive against overflow.Type: GrantFiled: September 1, 2000Date of Patent: April 20, 2004Assignees: Hitachi, Ltd., International Superconductivity Technology Center, NEC Corporation, Kabushiki Kaisha ToshibaInventors: Haruhiro Hasegawa, Kazunori Miyahara, Tatsunori Hashimoto, Shuichi Nagasawa, Youichi Enomoto
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Patent number: 6310488Abstract: In a superconductive single flux quantum logic circuit having two superconductive closed loops each comprising a Josephson junction and one or more inductors, a load inductance part is comprised of an inductor and a Josephson junction and two or more means for supplying a signal current are included. The load inductance part is made by one or more inductors and means for applying flux via the inductors is included.Type: GrantFiled: December 1, 1999Date of Patent: October 30, 2001Assignee: Hitachi, Ltd.Inventors: Haruhiro Hasegawa, Yoshinobu Tarutani, Tokuumi Fukazawa, Kazumasa Takagi
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Patent number: 5550389Abstract: A superconducting device low in power dissipation and high in operating speed is fabricated by use of a combination of a superconductor material and a semiconductor material. The superconducting device having a low power dissipation and high operating speed characteristic according to the present invention is suitable for configuring a large-scale integrated circuit.Type: GrantFiled: December 22, 1993Date of Patent: August 27, 1996Assignee: Hitachi, Ltd.Inventors: Toshikazu Nishino, Mutsuko Hatano, Haruhiro Hasegawa, Hideaki Nakane, Ushio Kawabe, Kazuo Saitoh, Mitsuo Suga, Kazumasa Takagi
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Patent number: 5468723Abstract: A superconducting device has a structure of superconductor--normal--conductor (semiconductor)--superconductor. The superconducting regions and the normal-conductor region can be made of the same elements but having different relative proportions of the elements. The device can be fabricated by introducing at least one element into an unmasked region of the superconductor to form a normal conductor region or into unmasked regions of the normal conductor to form superconductor regions.Type: GrantFiled: May 4, 1994Date of Patent: November 21, 1995Assignee: Hitachi, Ltd.Inventors: Toshikazu Nishino, Haruhiro Hasegawa, Ushio Kawabe
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Patent number: 5334580Abstract: A superconducting device has a structure of superconductor - normal-conductor (semiconductor) - superconductor. The superconductors constituting the superconducting device are made of a superconducting oxide material of K.sub.2 NiF.sub.4 type crystal-line structure or perovskite type crystalline structure which contains at least one element selected from the group consisting of Ba, Sr, Ca, Mg and Ra; at least one element selected from the group consisting of La, Y, Ce, Sc, Sm, Eu, Er, Gd, Ho, Yb, Nd, Pr, Lu and Tb; Cu; and O.Type: GrantFiled: January 14, 1993Date of Patent: August 2, 1994Assignee: Hitachi, Ltd.Inventors: Toshikazu Nishino, Haruhiro Hasegawa, Ushio Kawabe
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Patent number: 5317168Abstract: A superconducting field effect transistor which is very small in size and high in dimensional accuracy, has a first layer of material forming a control electrode and a second layer of another material is disposed on said first layer. A width of said first layer in a direction toward a superconducting source electrode and a superconducting drain electrode is narrower than a width of the second layer in the same direction. Polycrystalline silicon may be used as the control electrode while the second layer can be made of silicon nitride. Furthermore, a side surface of the control electrode may be coated with an insulator film. Accordingly, the above transistor has a fine structure gate electrode part that can be fabricated easily and accurately.Type: GrantFiled: November 19, 1992Date of Patent: May 31, 1994Assignee: Hitachi, Ltd.Inventors: Toshikazu Nishino, Ushio Kawabe, Fumio Murai, Tokuo Kure, Mutsuko Hatano, Haruhiro Hasegawa
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Patent number: 5256897Abstract: An oxide superconducting device has a junction structure composed of at least one oxide superconductor and at least one insulator in which carriers have been generated. As the insulator in which carriers have been generated, there can be used, for example, SrTiO.sub.3 doped with Nb. With such a device, rectifying characteristics can be attained in the junction.Type: GrantFiled: July 10, 1991Date of Patent: October 26, 1993Assignee: Hitachi, Ltd.Inventors: Haruhiro Hasegawa, Toshiyuki Aida, Toshikazu Nishino, Mutsuko Hatano, Hideaki Nakane, Tokuumi Fukazawa
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Patent number: 5250506Abstract: A superconductive element at least comprising first and second superconductive electrodes composed of an oxide superconductor material and a semiconductor film composed of an oxide semiconductor material put between the first and second superconductive electrodes and disposed in adjacent with the first and the second superconductive electrodes, in which the semiconductor film is formed with an oxide comprising rare earth elements other than Pr, Ba and Cu as the main ingredient element or an oxide comprising predetermined amount of rare earth elements other than Pr, predetermined amount of Pr, Ba and Cu as the main ingredient element. Extremely fine size is no more necessary to enable fabrication with the existent fine fabrication technic.Type: GrantFiled: January 29, 1991Date of Patent: October 5, 1993Assignee: Hitachi, Ltd.Inventors: Shinichiroh Saitoh, Yoshinobu Tarutani, Tokuumi Fukazawa, Masahiko Hiratani, Toshikazu Nishino, Haruhiro Hasegawa, Ushio Kawabe, Kazumasa Takagi, Mitsuo Suga