Patents by Inventor Takahiko Iwasaki
Takahiko Iwasaki 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: 10614014Abstract: To increase the number of selectable chips without adding a signal line to a general purpose memory controller. A semiconductor storage device includes a memory controller, a plurality of memory chips, a selection unit which is connected to the memory controller and is connected with the plurality of memory chips to be able to select any one of the plurality of memory chips, and a switch unit which is connected to the memory controller and the selection unit. The memory controller and the selection unit are connected by a signal line for transmitting a first signal outputted from the memory controller and configured to select the memory chips. The memory controller and the switch unit are connected by a signal line for transmitting a second signal outputted from the memory controller and configured to select the memory chips.Type: GrantFiled: September 26, 2016Date of Patent: April 7, 2020Assignee: Hitachi, Ltd.Inventors: Yasuhiro Ikeda, Yutaka Uematsu, Shungo Okabe, Akihiro Inamura, Takahiko Iwasaki, Junji Ogawa
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Publication number: 20190073330Abstract: To increase the number of selectable chips without adding a signal line to a general purpose memory controller. A semiconductor storage device includes a memory controller, a plurality of memory chips, a selection unit which is connected to the memory controller and is connected with the plurality of memory chips to be able to select any one of the plurality of memory chips, and a switch unit which is connected to the memory controller and the selection unit. The memory controller and the selection unit are connected by a signal line for transmitting a first signal outputted from the memory controller and configured to select the memory chips. The memory controller and the switch unit are connected by a signal line for transmitting a second signal outputted from the memory controller and configured to select the memory chips.Type: ApplicationFiled: September 26, 2016Publication date: March 7, 2019Inventors: Yasuhiro IKEDA, Yutaka UEMATSU, Shungo OKABE, Akihiro INAMURA, Takahiko IWASAKI, Junji OGAWA
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Patent number: 8681489Abstract: A storage unit is provided with a plurality of sub storage units configured to include a plurality of hard disk drives, an enclosure, a printed wiring board, a power supply device, and a cable holder. The sub storage units each operate separately. The enclosure is provided in the array of the hard disk drives so that the distance can be shorter between the enclosure and each of the hard disk drives. With the provision of the cable holder, communications cables can be both brought closer to the printed wiring board. With such a configuration, the coupling point among the communications cables and the printed wiring board, and the enclosure can be favorably reduced. The resulting storage control apparatus can be mounted with a larger number of storage devices, thereby being able to maintain good signal quality.Type: GrantFiled: May 17, 2012Date of Patent: March 25, 2014Assignee: Hitachi, Ltd.Inventors: Midori Kurokawa, Akihiro Inamura, Tsuyoshi Sasagawa, Takahiko Iwasaki, Toru Yoneyama, Minoru Shimokawa, Kiyoshi Honda
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Publication number: 20120226875Abstract: A storage unit is provided with a plurality of sub storage units configured to include a plurality of hard disk drives, an enclosure, a printed wiring board, a power supply device, and a cable holder. The sub storage units each operate separately. The enclosure is provided in the array of the hard disk drives so that the distance can be shorter between the enclosure and each of the hard disk drives. With the provision of the cable holder, communications cables can be both brought closer to the printed wiring board. With such a configuration, the coupling point among the communications cables and the printed wiring board, and the enclosure can be favorably reduced. The resulting storage control apparatus can be mounted with a larger number of storage devices, thereby being able to maintain good signal quality.Type: ApplicationFiled: May 17, 2012Publication date: September 6, 2012Inventors: Midori KUROKAWA, Akihiro Inamura, Tsuyoshi Sasagawa, Takahiko Iwasaki, Toru Yoneyama, Minoru Shimokawa, Kiyoshi Honda
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Patent number: 8189329Abstract: A storage unit is provided with a plurality of sub storage units configured to include a plurality of hard disk drives, an enclosure, a printed wiring board, a power supply device, and a cable holder. The sub storage units each operate separately. The enclosure is provided in the array of hard disk drives so that the distance can be shorter between the enclosure and each of the hard disk drives. With the provision cable holder, communications cables can be both brought closer to the printed wiring board. With such a configuration, the coupling point among the communications cables and the printed wiring board, and the enclosure can be favorably reduced. The resulting storage control apparatus of the invention can be mounted with a larger number of storage devices, thereby being able to keep the signal quality.Type: GrantFiled: January 15, 2009Date of Patent: May 29, 2012Assignee: Hitachi, Ltd.Inventors: Midori Kurokawa, Akihiro Inamura, Tsuyoshi Sasagawa, Takahiko Iwasaki, Toru Yoneyama, Minoru Shimokawa, Kiyoshi Honda
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Patent number: 8030827Abstract: In a crystal unit, at least two places of an outer circumference of a quartz crystal blank, which are places that correspond to both ends of a stress sensitivity zero axis of the crystal blank, are supported by supporters and fixed to the supporters by conductive adhesives. Each supporter includes; a vertical portion with a surface extending vertically, a slit formed in the vertical portion as extending vertically and with both ends thereof being closed, and a tongue portion projecting from a lower end of the slit. Each conductive adhesive includes; a first portion formed between the tongue portion and a lower surface of the crystal blank, a second portion extending to an end face of the crystal blank from an outer surface of the supporter and through the slit, and a third portion formed between an inner surface of the supporter and an upper surface of the crystal blank.Type: GrantFiled: February 6, 2009Date of Patent: October 4, 2011Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takahiko Iwasaki, Kouichi Hara, Shigeru Obara
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Patent number: 7911789Abstract: In the disk array system, in the basic chassis, HDD modules are installed from a front surface in a front part of a backboard, and duplex CTL modules are installed up and down from a rear surface in a rear part, and duplex power source modules containing fans are installed in the left and right sides thereof. By the operation of the fans, in the rear part, the cooling air flows separately into each CTL module and into each power source module, and the cooling air having passed through the area of the duct by a block in the CTL module is drawn by the fans in the power source module through a ventilation hole and is then exhausted outside. The cooling air flow path to the plurality of ICs is divided by the block. The rotation speed of the fans is controlled by using a temperature sensor.Type: GrantFiled: August 13, 2009Date of Patent: March 22, 2011Assignee: Hitachi, Ltd.Inventors: Tsuyoshi Sasagawa, Hirokazu Takahashi, Takahiko Iwasaki, Taro Takahashi, Chikazu Yokoi
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Publication number: 20100118483Abstract: A storage unit 3 is provided therein with a plurality of sub storage units 4. The sub storage units 4 are each configured to include a plurality of hard disk drives 5, an enclosure 6, a printed wiring board 7, a power supply device 8, and a cable holder 9. The sub storage units 4 operate each separately. The enclosure 6 is provided in the array of the hard disk drives so that the distance can be shorter between the enclosure 6 and each of the hard disk drives 5. With the provision of the cable holder 9, communications cables 9A and 9B can be both brought closer to the printed wiring board 7. With such a configuration, the coupling point among the communications cables 9A and 9B and the printed wiring board 7, and the enclosure 6 can be favorably reduced. As such, the storage control apparatus of the invention can be mounted with a larger number of storage devices, thereby being able to keep the signal quality.Type: ApplicationFiled: January 15, 2009Publication date: May 13, 2010Inventors: Midori Kurokawa, Akihiro Inamura, Tsuyoshi Sasagawa, Takahiko Iwasaki, Toru Yoneyama, Minoru Shimokawa, Kiyoshi Honda
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Publication number: 20100002374Abstract: In the disk array system, in the basic chassis, HDD modules are installed from a front surface in a front part of a backboard, and duplex CTL modules are installed up and down from a rear surface in a rear part, and duplex power source modules containing fans are installed in the left and right sides thereof. By the operation of the fans, in the rear part, the cooling air flows separately into each CTL module and into each power source module, and the cooling air having passed through the area of the duct by a block in the CTL module is drawn by the fans in the power source module through a ventilation hole and is then exhausted outside. The cooling air flow path to the plurality of ICs is divided by the block. The rotation speed of the fans is controlled by using a temperature sensor.Type: ApplicationFiled: August 13, 2009Publication date: January 7, 2010Inventors: Tsuyoshi Sasagawa, Hirokazu Takahashi, Takahiko Iwasaki, Taro Takahashi, Chikazu Yokoi
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Patent number: 7593225Abstract: In the disk array system, in the basic chassis, HDD modules are installed from a front surface in a front part of a backboard, and duplex CTL modules are installed up and down from a rear surface in a rear part, and duplex power source modules containing fans are installed in the left and right sides thereof. By the operation of the fans, in the rear part, the cooling air flows separately into each CTL module and into each power source module, and the cooling air having passed through the area of the duct by a block in the CTL module is drawn by the fans in the power source module through a ventilation hole and is then exhausted outside. The cooling air flow path to the plurality of ICs is divided by the block. The rotation speed of the fans is controlled by using a temperature sensor.Type: GrantFiled: January 30, 2008Date of Patent: September 22, 2009Assignee: Hitachi, Ltd.Inventors: Tsuyoshi Sasagawa, Hirokazu Takahashi, Takahiko Iwasaki, Taro Takahashi, Chikazu Yokoi
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Publication number: 20090195126Abstract: In a crystal unit, at least two places of an outer circumference of a quartz crystal blank, which are places that correspond to both ends of a stress sensitivity zero axis of the crystal blank, are supported by supporters and fixed to the supporters by conductive adhesives. Each supporter includes; a vertical portion with a surface extending vertically, a slit formed in the vertical portion as extending vertically and with both ends thereof being closed, and a tongue portion projecting from a lower end of the slit. Each conductive adhesive includes; a first portion formed between the tongue portion and a lower surface of the crystal blank, a second portion extending to an end face of the crystal blank from an outer surface of the supporter and through the slit, and a third portion formed between an inner surface of the supporter and an upper surface of the crystal blank.Type: ApplicationFiled: February 6, 2009Publication date: August 6, 2009Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: Takahiko IWASAKI, Kouichi HARA, Shigeru OBARA
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Patent number: 7441130Abstract: A controller performs data communication with a host system based on fiber channel protocol and controls data input/output to or from a SATA disk drive. The controller includes an FC/SATA converter powered by a main power supply, and a resource management processor powered by a standby power supply. The resource management processor controls the power supply from the main power supply to the FC/SATA converter.Type: GrantFiled: September 13, 2005Date of Patent: October 21, 2008Assignee: Hitachi, Ltd.Inventors: Daisuke Isobe, Azuma Kano, Takahiko Iwasaki, Tsuyoshi Sasagawa, Midori Kurokawa
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Publication number: 20080239656Abstract: In the disk array system, in the basic chassis, HDD modules are installed from a front surface in a front part of a backboard, and duplex CTL modules are installed up and down from a rear surface in a rear part, and duplex power source modules containing fans are installed in the left and right sides thereof. By the operation of the fans, in the rear part, the cooling air flows separately into each CTL module and into each power source module, and the cooling air having passed through the area of the duct by a block in the CTL module is drawn by the fans in the power source module through a ventilation hole and is then exhausted outside. The cooling air flow path to the plurality of ICs is divided by the block. The rotation speed of the fans is controlled by using a temperature sensor.Type: ApplicationFiled: January 30, 2008Publication date: October 2, 2008Applicant: Hitachi, Ltd.Inventors: Tsuyoshi Sasagawa, Hirokazu Takahashi, Takahiko Iwasaki, Taro Takahashi, Chikazu Yokoi
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Publication number: 20070006001Abstract: A controller performs data communication with a host system based on fibre channel protocol and controls data input/output to or from a SATA disk drive. The controller includes an FC/SATA converter powered by a main power supply, and a resource management processor powered by a standby power supply. The resource management processor controls the power supply from the main power supply to the FC/SATA converter.Type: ApplicationFiled: September 13, 2005Publication date: January 4, 2007Inventors: Daisuke Isobe, Azuma Kano, Takahiko Iwasaki, Tsuyoshi Sasagawa, Midori Kurokawa
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Patent number: 7061164Abstract: The present invention relates to a crystal oscillator that is provided with a crystal element; a main surface electrode configured of a first underlayer formed on each of two main surfaces of the crystal element and a first surface layer of Au superimposed over the first underlayer; an end surface electrode having a second underlayer formed on the crystal element to extend over the main surface electrode and a second surface layer of Au superimposed to cover the second underlayer; a supporter for holding the crystal element in the horizontal direction, bonded to the end surface electrode by a eutectic alloy comprising at least Au; and a base on which the supporter stands.Type: GrantFiled: June 1, 2005Date of Patent: June 13, 2006Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takahiko Iwasaki, Shigeru Obara, Genwa Koki, Masaaki Nakahara
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Publication number: 20050269912Abstract: The present invention relates to a crystal oscillator that is provided with a crystal element; a main surface electrode configured of a first underlayer formed on each of two main surfaces of the crystal element and a first surface layer of Au superimposed over the first underlayer; an end surface electrode having a second underlayer formed on the crystal element to extend over the main surface electrode and a second surface layer of Au superimposed to cover the second underlayer; a supporter for holding the crystal element in the horizontal direction, bonded to the end surface electrode by a eutectic alloy comprising at least Au; and a base on which the supporter stands.Type: ApplicationFiled: June 1, 2005Publication date: December 8, 2005Inventors: Takahiko Iwasaki, Shigeru Obara, Genwa Koki, Masaaki Nakahara
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Patent number: 6586546Abstract: Aqueous copolymerization of TFE and PAVE in the presence of a small amount of terpene enables the manufacture of a more uniform melt-fabricable copolymer with a narrower molecular weight distribution. The copolymer exhibits improved flex life.Type: GrantFiled: June 14, 2001Date of Patent: July 1, 2003Assignee: DuPont-Mitsui Fluorochemicals Co. Ltd.Inventors: Takahiko Iwasaki, Masahiro Kino
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Patent number: 6545393Abstract: A quartz crystal unit using a metallic base and improved in its shock resistance includes a circular plate-like crystal blank having first and second extending electrodes respectively extended from excitation electrodes, first and second L-letter-shaped metallic brackets electrically and mechanically connected to the first and second extending electrodes at the outer circumferential portion of the crystal blank, first and second lead wires constituted as hermetic terminals penetrating the metallic base and bonded to the first and second brackets, and third and fourth L-letter-shaped metallic brackets mechanically connected to portions of the outer circumferential portion of the crystal blank, in which the naked surface if the crystal blank is exposed. The third and fourth brackets are interconnected to form an integral metallic holding member. An arrangement for connecting the holding member to the metallic base is further provided.Type: GrantFiled: August 20, 2002Date of Patent: April 8, 2003Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takahiko Iwasaki, Kazuyoshi Oguri
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Publication number: 20030048044Abstract: A quartz crystal unit using a metallic base and improved in its shock resistance includes a circular plate-like crystal blank having first and second extending electrodes respectively extended from excitation electrodes, first and second L-letter-shaped metallic brackets electrically and mechanically connected to the first and second extending electrodes at the outer circumferential portion of the crystal blank, first and second lead wires constituted as hermetic terminals penetrating the metallic base and bonded to the first and second brackets, and third and fourth L-letter-shaped metallic brackets mechanically connected to portions of the outer circumferential portion of the crystal blank, in which the naked surface if the crystal blank is exposed. The third and fourth brackets are interconnected to form an integral metallic holding member. An arrangement for connecting the holding member to the metallic base is further provided.Type: ApplicationFiled: August 20, 2002Publication date: March 13, 2003Inventors: Takahiko Iwasaki, Kazuyoshi Oguri
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Publication number: 20020028895Abstract: Aqueous copolymerization of TFE and PAVE in the presence of a small amount of terpene enables the manufacture of a more uniform melt-fabricable copolymer with a narrower molecular weight distribution. The copolymer exhibits improved flex life.Type: ApplicationFiled: June 14, 2001Publication date: March 7, 2002Inventors: Takahiko Iwasaki, Masahiro Kino