Patents Assigned to Hitach, Ltd.
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Patent number: 9911916Abstract: In order to form a phase change thin film being flat in a nanometer level and having a good coverage, which is essential for realizing a three-dimensional ultra-high integrated phase change memory, an equipment for vapor phase growth of a phase change thin film is provided which form a phase change thin film at low temperature while the film is being kept in a completely amorphous state. A structure is provided in which an ammonia cracker is connected to a reactor of the equipment for vapor phase growth for a nitrogen radical obtained by decomposing ammonia gas. Consequently, low temperature decomposition of metal organic precursor and film formation on a substrate surface are realized. With the use of this equipment, it is possible to realize a completely amorphous film which has a flat surface at a low temperature of 135° C. using an amine complex as a Ge precursor.Type: GrantFiled: March 28, 2014Date of Patent: March 6, 2018Assignee: HITACH, LTD.Inventors: Yoshihisa Fujisaki, Yoshitaka Sasago, Takashi Kobayashi
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Publication number: 20170235677Abstract: A computer system that is composed of a host computer, a storage device and a management computer. The storage device comprises a port for connecting with the host computer, a cache memory, a processor, and a plurality of logic volumes which are logical memory regions. For each logic volume, the port, the cache memory and the processor are divided into logic partitions, as resources that are used for reading and writing in the logic volume. The host computer reads and writes with respect to the logic volumes. If a failure occurs in the storage device, the management computer issues a command to the storage device to allocate the resources of a logic partition for which reading/writing performance is not ensured to a logic partition for which reading/writing performance is ensured.Type: ApplicationFiled: November 12, 2014Publication date: August 17, 2017Applicant: Hitach, Ltd.Inventors: Hidenori SAKANIWA, Wataru OKADA, Yoshinori OHIRA, Etsutarou AKAGAWA, Nobuhiro MAKI, Mioko MORIGUCHI
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Publication number: 20170229176Abstract: In a semiconductor recording device, a writing time as long as in the case where the number of bits to be subjected to ‘0’ writing is large even in the case where the number of bits to be subjected to ‘0’ writing in page writing is small. A population counter that controls the number of ‘0’ bits is provided. In addition, a writing driver is divided into a plurality of sub-writing drivers. In this configuration, as many sub-writing drivers as possible are driven as long as the number of ‘0’ writing bits is equal to or smaller than the maximum number of bits that can be simultaneously written.Type: ApplicationFiled: September 9, 2014Publication date: August 10, 2017Applicant: Hitach, Ltd.Inventors: Kenzo KUROTSUCHI, Yoshitaka SASAGO
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Patent number: 9496516Abstract: In order to achieve the increased efficiency of an organic light-emitting element, there is a need to reduce the influence of non-radiative recombination of electron-hole pairs except for surface plasmon polariton excitation, to convert most of exciton energy into visible light, and to tremendously improve the luminous efficiency of the organic light-emitting element. An organic light-emitting element according to the present invention includes a reflective electrode, a transparent electrode, and a light-emitting layer placed between the reflective electrode and the transparent electrode, and the organic light-emitting element is configured so that the light-emitting layer contains a host and a first dopant, and for the first dopant, one of the vertical component and horizontal component of the average value for transition dipole moments with respect to a substrate surface is larger than the other of the components.Type: GrantFiled: July 3, 2012Date of Patent: November 15, 2016Assignee: Hitach, Ltd.Inventors: Hirotaka Sakuma, Sukekazu Aratani, Shunichiro Nobuki, Shingo Ishihara
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Patent number: 9317312Abstract: A computer comprising: a processor; a memory; and an I/O device, the memory including at least one first memory element and at least one second memory element, wherein a memory area provided by the at least one second memory element includes a data storage area and a data compression area, wherein the computer comprises a virtualization management unit, and wherein the virtualization management unit is configured to: set a working set for storing data required for processing performed by a virtual machine in generating the virtual machine, and control data stored in the working set in such a manner that part of the data stored in the working set is stored in the data compression area based on a state of accesses to the data stored in the working set.Type: GrantFiled: February 26, 2014Date of Patent: April 19, 2016Assignee: HITACH, LTDInventors: Nobukazu Kondo, Yusuke Fukumura
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Publication number: 20150003133Abstract: Ringing is securely reduced in a case where a Schottky barrier diode of a wide-gap semiconductor is applied to a power conversion circuit. A gate voltage increasing circuit 11a is included. In a period since a gate voltage of a semiconductor switching element in one of upper and lower arms starts being increased from a value in an off-state until the gate voltage reaches a value in an on-state, the gate voltage increasing circuit 11a is configured to make a gate voltage of the semiconductor switching element in the other one of the upper and lower arms change from a value in an off-state into a value larger than the value in the off-state and is configured to control the value larger than the value in the off-state for a predetermined period of time.Type: ApplicationFiled: January 22, 2013Publication date: January 1, 2015Applicant: Hitach, Ltd.Inventors: Kazutoshi Ogawa, Katsumi Ishikawa
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Publication number: 20140250286Abstract: A computer comprising: a processor; a memory; and an I/O device, the memory including at least one first memory element and at least one second memory element, wherein a memory area provided by the at least one second memory element includes a data storage area and a data compression area, wherein the computer comprises a virtualization management unit, and wherein the virtualization management unit is configured to: set a working set for storing data required for processing performed by a virtual machine in generating the virtual machine, and control data stored in the working set in such a manner that part of the data stored in the working set is stored in the data compression area based on a state of accesses to the data stored in the working set.Type: ApplicationFiled: February 26, 2014Publication date: September 4, 2014Applicant: HITACH, LTDInventors: Nobukazu KONDO, Yusuke FUKUMURA
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Publication number: 20100114447Abstract: The invention is to provide an automobile and a control device for the automobile, which permits to obtain a driving performance or a braking performance close to their limits achievable on the concerned road face even such as on a compacted snow road and a frozen road. In the control device for the automobile for controlling a driving torque and/or a braking torque for wheels of the automobile, when a slip rate of the wheels is kept in a range smaller than a value where a friction coefficient between the wheels and the road face maximizes, and when a command for increasing the driving torque or the braking torque is input to the control device, the driving torque or the braking torque is controlled by selectively using a first control mode for gradually increasing the driving torque or the braking torque or a second control mode for gradually decreasing the driving torque or the braking torque in response to a slip condition.Type: ApplicationFiled: January 15, 2008Publication date: May 6, 2010Applicant: Hitach, Ltd.Inventors: Hidekazu Moriki, Shinya Imura, Norikazu Matsuzaki, Kohei Itoh, Shin Fujiwara
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Publication number: 20090218643Abstract: An object of the present invention is to solve problems in that aluminum electrodes, aluminum wires, and I/O terminals are corroded by corrosive gasses when a pressure of a pressure medium containing corrosive matters such as exhaust gas is measured with a semiconductor sensor; and improve not only the corrosion resistance of the sensor chip but also the corrosion resistance of the portion particularly functioning as the pressure receiver. Each of the aluminum electrodes that is likely to be corroded portions is prevented from being corroded by forming a titanium-tungsten layer and gold layer on the aluminum electrode. The connecting wires are prevented from being corroded by corrosive matters by using gold wires. The I/O terminals are also prevented from being corroded by applying gold plating.Type: ApplicationFiled: November 1, 2005Publication date: September 3, 2009Applicants: Hitach, Ltd., Fuji Electric Device Technology Co., Ltd.Inventors: Toshiaki Kaminaga, Masahide Hayashi, Katusmichi Ueyanagi, Kazunori Saito, Mutsuo Nishikawa
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Publication number: 20080178853Abstract: The present invention prevents an EGR sensor installed in an engine's EGR path from being soiled by soiling substances in exhaust. A catalyst is positioned upstream of the EGR sensor to purify the soiling substances in EGR gas. The status of the EGR sensor is properly controlled in accordance with the conditions of the catalyst. This ensures the EGR sensor is less likely to be affected by the soiling substances in the exhaust under any circumstances of the EGR path and allows the EGR sensor to avoid a decrease in the accuracy of EGR gas detection. An alternative configuration may be employed such that the EGR gas recirculates from the downstream side of a catalyst installed in a main exhaust path.Type: ApplicationFiled: November 20, 2007Publication date: July 31, 2008Applicant: HITACH, LTD.Inventors: Shiro YAMAOKA, Eiichiro OHATA, Jun KUBO, Noboru TOKUYASU, Toshiki OTSUKI, Hiroaki HOSHIKA
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Publication number: 20060096574Abstract: An air flow sensor for an internal combustion engine is disclosed. An air flow rate measurement meter, a pressure gauge, electronically controlled throttle body, and the microcomputer, etc. are integrated as one body, and the correction of the air flow rate, the control, and the fault diagnosis, etc. are done in the integrated microcomputer. The air flow sensor outputs an air flow rate signal in which the error is deleted to suppress the discharge of the harmful exhaust gas from the internal combustion engine, carries out the self-diagnosis of the breakdown of the air flow sensor or the electronically controlled throttle body to prevent the accident beforehand, and controls to obtain the best intake air amount.Type: ApplicationFiled: December 29, 2005Publication date: May 11, 2006Applicants: HITACH LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Hiroshi Hirayama, Shinya Igarashi, Takayuki Itsuji, Yasuo Makie
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Publication number: 20050146232Abstract: A rotating electric machine comprises: a stator including a stator iron core having a plurality of slots and a stator winding incorporated in the plurality of slots; and a rotor rotatably disposed in the stator via a clearance; wherein a mold (i.e., a slot insulator) made of an insulating resin is brought into close contact with the surface of a projection (i.e., a tooth core) of the stator iron core, formed between the adjacent slots, the thickness of the mold at a portion of the projection wound with the stator winding being smaller than that of the mold at other portions. Thus, it is possible to provide the rotating electric machine in which thermal resistance generated between the stator winding and the stator iron core can be reduced, thermal transmittance of heat generated in the stator winding to the stator iron core can be enhanced, and the cooling efficiency of the stator winding can be enhanced.Type: ApplicationFiled: October 13, 2004Publication date: July 7, 2005Applicant: HITACH LTD.Inventors: Noriaki Yamamoto, Fumio Tajima, Osamu Koizumi
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Publication number: 20050086192Abstract: In one aspect of the invention, a search engine parses files stored among one or more file servers in order to create and maintain index information used by the search engine to perform searches. For a given file server, the population of files presented to the search engine is reduced in size to facilitate the process of updating the index. In another aspect of the invention, the file server limits the files presented in a directory list request made by a search engine. This reduces the number of file s that need to be considered when performing an index update.Type: ApplicationFiled: October 16, 2003Publication date: April 21, 2005Applicant: Hitach, Ltd.Inventor: Shoji Kodama
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Publication number: 20050052271Abstract: A low noise, compact and low cost electric power converter employing a compact common mode transformer, and incorporating a line filter can reduce a leakage current, and can maintain predetermined leakage current reduction effect even if installation condition of the electric power converter or a characteristics of a semiconductor switching element is varied. The electric power converter including a capacitor, a first electrode, a second electrode, a first magnetic body, on which the first electrode and the second electrode are wound to form an LC composite element, connecting electrodes electrically connected to respective of both ends of the first and second electrodes, a second magnetic body for interlinking both ends of the first magnetic body, a coil wound around the second magnetic body in the same winding direction as the first and second electrodes wound around the first magnetic body and a resistor for shorting the output of the coil.Type: ApplicationFiled: October 20, 2004Publication date: March 10, 2005Applicant: HITACH LTD.Inventors: Kinya Nakatsu, Satoshi Ibori, Masayuki Hirota, Tooru Nakajima
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Publication number: 20050031318Abstract: According to the invention, techniques for recording data onto recording media at relatively high transfer rates for relatively long periods of time. Embodiments according to the present invention include systems and apparatus capable of an improved sustained rate of data recording onto disk type-recording media, for example. Many embodiments can remove the upper limits of both recording capacity and the number of media that can be used. Select embodiments can be used with different kinds of recording media as well. In a specific embodiment, the area on a hard disk is divided into three areas. A first area can be suitable for sequential recording of continuous data. A second area can be suitable for random recording of discontinuous data. A third area can be used for recording logical sector numbers, coupling logical sector numbers, and file information that are used for marking each of the first and second areas, so that continuous data can be recorded on the hard disk at a high data rate.Type: ApplicationFiled: September 9, 2004Publication date: February 10, 2005Applicant: Hitach, Ltd.Inventors: Kouji Fujita, Hideo Nishijima, Kazuya Yamashita
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Publication number: 20040071032Abstract: A logic circuit in a system LSI is provided with a power switch so as to cut off the switch at the time of standby, reducing leakage current. At the same time, an SRAM circuit of the system LSI controls a substrate bias to reduce leakage current.Type: ApplicationFiled: September 29, 2003Publication date: April 15, 2004Applicant: Hitach, Ltd.Inventors: Masanao Yamaoka, Koichiro Ishibashi, Shigezumi Matsui, Kenichi Osada
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Patent number: 6537832Abstract: A film formation monitor of a plasma CVD apparatus includes a light source for generating measuring light. Measuring light generated from the light source is guided to an optical system having lenses and mirrors, and is irradiated to a silicon substrate at a plurality of angles of incidence with the back of the silicon substrate being substantially a focus. Reflected light from the substrate is incident into a spectroscope. An intensity of measuring light is detected for each wavelength. A calculation apparatus calculates an etching depth. Reflected light from the back of the substrate interferes with reflected light from an etchd surface. To reduce influences of reflected light from the back of the substrate, measuring light is irradiated while its angle of incidence is varied.Type: GrantFiled: May 1, 2001Date of Patent: March 25, 2003Assignee: Hitach, Ltd.Inventors: Toru Otsubo, Tatehito Usui
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Patent number: 6512829Abstract: A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center generates key information of a receiver in association with a subset inclusive of two or more elements of a proper finite set S1 on the basis of a space determined by a subset inclusive of two or more elements of another finite set S2. A sender side apparatus, a sender makes the multi-address transmission of key distribution data W inclusive of data generated corresponding to each element of the finite set S1 and data generated corresponding to a set of plural receivers through a communication network. By use of a receiver side apparatus, a receiver generates common key information between the sender and the receiver from the key distribution data W and the key information of the receiver.Type: GrantFiled: March 7, 2000Date of Patent: January 28, 2003Assignee: Hitach, Ltd.Inventors: Mototsugu Nishioka, Hisashi Umeki, Susumu Matsui
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Patent number: 6487100Abstract: A semiconductor integrated circuit device and a contactless electronic device are provided with a power supply circuit producing a stable smooth voltage with high efficiency for stable operation of an inner circuit. An AC voltage is applied to first and second input terminals and a rectification transistor having drain (or collector) connected to second input terminal and gate (or base) and drain (or collector) connected to each other through resistor supplies a rectified current between the first and second input terminals. The first voltage detection means produces control voltage so that the rectified voltage obtained on the source (or emitter) side of the first rectification transistor is equal to the predetermined reference voltage. The first voltage controlled current source can produce current in accordance with the control voltage and supply the current to the first resistor means. Such power supply circuit is mounted in the contactless electronic device.Type: GrantFiled: March 20, 2001Date of Patent: November 26, 2002Assignee: Hitach, Ltd.Inventors: Kazuki Watanabe, Ryouzou Yoshino, Norihisa Yamamoto, Hajime Kinota, Keiji Kamei
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Patent number: 6472808Abstract: A color cathode ray tube includes third, fourth and fifth electrodes and an anode in its electron beam focusing section.Type: GrantFiled: December 21, 1999Date of Patent: October 29, 2002Assignee: Hitach, Ltd.Inventors: Go Uchida, Shoji Shirai, Shinichi Kato, Koichi Miyagawa