Patents by Inventor Tatemi Ido
Tatemi Ido 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: 10502758Abstract: Airtightness in a cavity of an inertial sensor (acceleration sensor) is increased to achieve high sensitivity. In the acceleration sensor having movable electrodes VE1, VE2 and fixed electrodes FE1, FE2, the fixed electrodes are formed by portions surrounded by a through hole TH1 provided in a cap layer CL, and the through hole is filled with an insulating film IF1 and polysilicon P and has a wide portion (WP). The wide portion has a gap SP that is not filled with the insulating film IF1 and the polysilicon P, and the gap SP is filled with the interlayer insulating film ID. With such a configuration, degassing can be exhausted through the gap (airway) SP in a pressure reducing step.Type: GrantFiled: November 9, 2016Date of Patent: December 10, 2019Assignee: Hitachi, Ltd.Inventors: Takashi Shiota, Tatsuyuki Saito, Tatemi Ido, Noriyuki Sakuma, Yuudai Kamada, Atsushi Isobe, Chisaki Takubo
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Publication number: 20180238926Abstract: Airtightness in a cavity of an inertial sensor (acceleration sensor) is increased to achieve high sensitivity. In the acceleration sensor having movable electrodes VE1, VE2 and fixed electrodes FE1, FE2, the fixed electrodes are formed by portions surrounded by a through hole TH1 provided in a cap layer CL, and the through hole is filled with an insulating film IF1 and polysilicon P and has a wide portion (WP). The wide portion has a gap SP that is not filled with the insulating film IF1 and the polysilicon P, and the gap SP is filled with the interlayer insulating film ID. With such a configuration, degassing can be exhausted through the gap (airway) SP in a pressure reducing step.Type: ApplicationFiled: November 9, 2016Publication date: August 23, 2018Inventors: Takashi SHIOTA, Tatsuyuki SAITO, Tatemi IDO, Noriyuki SAKUMA, Yuudai KAMADA, Atsushi ISOBE, Chisaki TAKUBO
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Patent number: 9570096Abstract: A method and apparatus is provided for extending a read bandwidth and increasing a high-frequency signal-to-noise ratio (SNR) of a front-end of a read path of a hard disk drive (HDD) by introducing a high impedance section at the front-end of the read path. The high impedance section may mitigate capacitive effects found at the front-end of the read path, thereby improving signal transfer by extending the read bandwidth.Type: GrantFiled: August 6, 2010Date of Patent: February 14, 2017Assignee: HGST NETHERLANDS B.V.Inventors: John Contreras, Tatemi Ido, Nobumasa Nishiyama, Xinzhi Xing
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Patent number: 9379276Abstract: There are provided an optical interconnection module and an optical-electrical hybrid board using the same to process optical and electric signals on a board at a low transmission loss at high speed in transmitting high-speed optical signals sent and received between chips or between boards in a data processing apparatus. An optical interconnection module has a structure in which an optical signal is emitted from a laser optical source device, propagates the inside of a modulator device, and is deflected by a beam turning structure in the vertical direction of a substrate, an optical signal is incident from the outside of a semiconductor substrate, and transmitted and received at a photo diode provided on the semiconductor substrate, and the optical signals are optically connected to each other through the inside of the semiconductor substrate in the vertical direction of the substrate with the outside of the semiconductor substrate.Type: GrantFiled: January 1, 2015Date of Patent: June 28, 2016Assignee: Hitachi, Ltd.Inventors: Yasunobu Matsuoka, Toshiki Sugawara, Tatemi Ido
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Publication number: 20150155423Abstract: There are provided an optical interconnection module and an optical-electrical hybrid board using the same to process optical and electric signals on a board at a low transmission loss at high speed in transmitting high-speed optical signals sent and received between chips or between boards in a data processing apparatus. An optical interconnection module has a structure in which an optical signal is emitted from a laser optical source device, propagates the inside of a modulator device, and is deflected by a beam turning structure in the vertical direction of a substrate, an optical signal is incident from the outside of a semiconductor substrate, and transmitted and received at a photo diode provided on the semiconductor substrate, and the optical signals are optically connected to each other through the inside of the semiconductor substrate in the vertical direction of the substrate with the outside of the semiconductor substrate.Type: ApplicationFiled: January 1, 2015Publication date: June 4, 2015Inventors: Yasunobu MATSUOKA, Toshiki SUGAWARA, Tatemi IDO
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Patent number: 8902947Abstract: An optical module providing higher reliability during high-speed light modulation and a lower bit error rate when built into a transmitter (transceiver). An optical module contains a taper mirror for surface emission of output light, an optical modulator device, and an optical modulation drive circuit, and the optical modulator device and the optical modulation drive circuit are mounted at positions so as to enclose the taper mirror.Type: GrantFiled: January 9, 2012Date of Patent: December 2, 2014Assignee: Hitachi, Ltd.Inventors: Shigeki Makino, Yasunobu Matsuoka, Kenji Kogo, Toshiki Sugawara, Tatemi Ido
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Patent number: 8665681Abstract: There is provided an optical disc drive comprises an optical pick-up including a laser diode (LD) and a laser diode driver (LDD) for driving the laser diode, a digital signal processor (DSP) including a write strategy circuit and low voltage differential signaling (LVDS) drivers for transmitting a produced write strategy signal, a circuit board having the DSP mounted thereon and including a line for transmitting the write strategy signal, a transmission line connecting the circuit board and the LDD and transmitting a write strategy signal, and differential resistors connected between differential lines of outputs of the LVDS drivers. Especially, a resistor having a resistance value in a range of 80 to 500? is inserted between the differential lines of outputs of the LVDS driver inside the DSP.Type: GrantFiled: October 15, 2008Date of Patent: March 4, 2014Assignee: Hitachi-Lg Data Storage, Inc.Inventors: Akira Kitayama, Tatemi Ido, Nobuaki Sato, Hiroharu Sakai, Kouichi Ihara
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Patent number: 8448196Abstract: An electronic device including a mechanism for changing the relative positions of two circuit boards such as in an optical disc drive is provided. A flexible printed circuit electrically connected between the two circuit boards changes shape to suppress fluctuations in the transmission characteristics occurring due to contact with metal such as a case, and provides stable signal transmission. The flexible printed circuit includes at least one or more differential lines, a fixed unit affixed to a case at least at one location, and a movable unit that changes shape according to the relative positions of two cases. The lines adjacent to the differential line are a grounded surface, and the flexible printed circuit is formed to narrow the distance between the movable unit lines more than the distance between the fixed unit lines.Type: GrantFiled: November 16, 2010Date of Patent: May 21, 2013Assignees: Hitachi Consumer Electronics Co., Ltd., Hitachi—LG Data Storage, Inc.Inventors: Akira Kitayama, Kouichi Ihara, Kenji Takahashi, Tatemi Ido
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Publication number: 20120251033Abstract: There are provided an optical interconnection module and an optical-electrical hybrid board using the same to process optical and electric signals on a board at a low transmission loss at high speed in transmitting high-speed optical signals sent and received between chips or between boards in a data processing apparatus. An optical interconnection module has a structure in which an optical signal is emitted from a laser optical source device, propagates the inside of a modulator device, and is deflected by a beam turning structure in the vertical direction of a substrate, an optical signal is incident from the outside of a semiconductor substrate, and transmitted and received at a photo diode provided on the semiconductor substrate, and the optical signals are optically connected to each other through the inside of the semiconductor substrate in the vertical direction of the substrate with the outside of the semiconductor substrate.Type: ApplicationFiled: February 10, 2012Publication date: October 4, 2012Inventors: Yasunobu MATSUOKA, Toshiki SUGAWARA, Tatemi IDO
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Publication number: 20120250711Abstract: An optical module providing higher reliability during high-speed light modulation and a lower bit error rate when built into a transmitter (transceiver). An optical module contains a taper mirror for surface emission of output light, an optical modulator device, and an optical modulation drive circuit, and the optical modulator device and the optical modulation drive circuit are mounted at positions so as to enclose the taper mirror.Type: ApplicationFiled: January 9, 2012Publication date: October 4, 2012Applicant: Hitachi, Ltd.Inventors: Shigeki MAKINO, Yasunobu MATSUOKA, Kenji KOGO, Toshiki SUGAWARA, Tatemi IDO
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Patent number: 8194356Abstract: A head-stack assembly. The head-stack assembly includes: a magnetic-recording head; a lead-suspension supporting the magnetic-recording head on an actuator arm; a metal plate coupled with the actuator arm; a resin layer disposed on the metal plate; a flexible-printed-circuit board disposed on the resin layer, and substantially perpendicularly connected to the lead-suspension; a arm-electronics module disposed on the flexible-printed-circuit board configured to shape a write-signal current waveform of a write signal to said magnetic-recording head; transmission lines disposed on the flexible-printed-circuit board configured to transmit the write signal to, and a read-back signal from, the lead-suspension; and, a single intermediate conductor layer that is disposed between the resin layer and the flexible-printed-circuit board, and having a planar shape substantially facing a bottom of the arm-electronics module and a bottom of the transmission lines.Type: GrantFiled: December 22, 2009Date of Patent: June 5, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Kazuhiro Nagaoka, Tatemi Ido, Nobumasa Nishiyama, Yuji Soga
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Publication number: 20120033319Abstract: A method and apparatus is provided for extending a read bandwidth and increasing a high-frequency signal-to-noise ratio (SNR) of a front-end of a read path of a hard disk drive (HDD) by introducing a high impedance section at the front-end of the read path. The high impedance section may mitigate capacitive effects found at the front-end of the read path, thereby improving signal transfer by extending the read bandwidth.Type: ApplicationFiled: August 6, 2010Publication date: February 9, 2012Inventors: John Contreras, Tatemi Ido, Nobumasa Nishiyama, Xinzhi Xing
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Patent number: 8111667Abstract: In a MIMO wireless transceiver, priority control that judges priority of transmit data and a transmission mode table are provided to control an option as to which transmission system SDM or STBC is selected, coding rate and modulation method based on a transmission mode for a transmission destination that is determined by priority of transmission data and status of a communication matrix at the time of data transmission. With such arrangement, a wireless communication system composed of the MIMO wireless transceiver can control coding, MIMO signal processing and modulation methods according to priority of transmit data. More specifically, it is possible to ensure transmission of data having higher priority and improve throughput in total when a plurality of types of data are transmitted.Type: GrantFiled: February 9, 2009Date of Patent: February 7, 2012Assignee: Hitachi, Ltd.Inventors: Masaaki Shida, Tatemi Ido
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Publication number: 20110126221Abstract: A electronic device including a mechanism for changing the relative positions of two circuit boards such as in an optical disc drive, in which a flexible printed circuit electrically connecting between the two circuit board changes shape to suppress fluctuations in the transmission characteristics occurring due to contact with metal such as a case, and provides stable signal transmission. A flexible printed circuit is comprised of at least one or more differential lines, a fixed unit affixed to a case at least at one location, a movable unit that changes shape according to the relative positions of two case. The lines adjacent to the differential line are a grounded surface, and the flexible printed circuit is formed to narrow the distance between the movable unit lines more than the distance between the fixed unit lines.Type: ApplicationFiled: November 16, 2010Publication date: May 26, 2011Applicants: Hitachi Consumer Electronics Co., Ltd., Hitachi - LG Data Storage, Inc.Inventors: Akira Kitayama, Kouichi Ihara, Kenji Takahashi, Tatemi Ido
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Publication number: 20110102935Abstract: A head-stack assembly. The head-stack assembly includes: a magnetic-recording head; a lead-suspension supporting the magnetic-recording head on an actuator arm; a metal plate coupled with the actuator arm; a resin layer disposed on the metal plate; a flexible-printed-circuit board disposed on the resin layer, and substantially perpendicularly connected to the lead-suspension; a arm-electronics module disposed on the flexible-printed-circuit board configured to shape a write-signal current waveform of a write signal to said magnetic-recording head; transmission lines disposed on the flexible-printed-circuit board configured to transmit the write signal to, and a read-back signal from, the lead-suspension; and, a single intermediate conductor layer that is disposed between the resin layer and the flexible-printed-circuit board, and having a planar shape substantially facing a bottom of the arm-electronics module and a bottom of the transmission lines.Type: ApplicationFiled: December 22, 2009Publication date: May 5, 2011Inventors: Kazuhiro Nagaoka, Tatemi Ido, Nobumasa NISHIYAMA, Yuji Soga
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Patent number: 7848714Abstract: A radio frequency circuit apparatus and a radio frequency module which permit alleviation of the PA efficiency drop and are compatible with both a MIMO system and a conventional system are to be provided. They are provided with a plurality of power amplifiers for amplifying a transmit signal and the plurality of power amplifiers include at least two power amplifiers differing in maximum output power from each other, and at least one out of the plurality of power amplifiers is used according to the communication system.Type: GrantFiled: January 19, 2006Date of Patent: December 7, 2010Assignee: Hitachi Metals, Ltd.Inventors: Eriko Takeda, Akira Kuriyama, Tatemi Ido
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Patent number: 7736482Abstract: An electrophoresis member is produced by laying a plurality of capillaries on an adhesive layer born on a support layer to form a capillary layer, laminating thereon a second support layer, and partially removing the first support layer, the first adhesive layer and the second support layer to partially expose the capillaries to form a window portion for irradiation and detection and a sample injection portion for injecting a sample.Type: GrantFiled: February 12, 2007Date of Patent: June 15, 2010Assignees: Hitachi, Ltd., Hitachi Chemical Company, Ltd.Inventors: Hiroshi Kawazoe, Tomoyuki Kamata, Atsushi Takahashi, Tsuyoshi Sonehara, Tatemi Ido, Kunio Harada
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Publication number: 20090147838Abstract: In a MIMO wireless transceiver, priority control that judges priority of transmit data and a transmission mode table are provided to control an option as to which transmission system SDM or STBC is selected, coding rate and modulation method based on a transmission mode for a transmission destination that is determined by priority of transmission data and status of a communication matrix at the time of data transmission. With such arrangement, a wireless communication system composed of the MIMO wireless transceiver can control coding, MIMO signal processing and modulation methods according to priority of transmit data. More specifically, it is possible to ensure transmission of data having higher priority and improve throughput in total when a plurality of types of data are transmitted.Type: ApplicationFiled: February 9, 2009Publication date: June 11, 2009Inventors: Masaaki Shida, Tatemi Ido
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Publication number: 20090103406Abstract: There is provided an optical disc drive comprises an optical pick-up including a laser diode (LD) and a laser diode driver (LDD) for driving the laser diode, a digital signal processor (DSP) including a write strategy circuit and low voltage differential signaling (LVDS) drivers for transmitting a produced write strategy signal, a circuit board having the DSP mounted thereon and including a line for transmitting the write strategy signal, a transmission line connecting the circuit board and the LDD and transmitting a write strategy signal, and differential resistors connected between differential lines of outputs of the LVDS drivers. Especially, a resistor having a resistance value in a range of 80 to 500? is inserted between the differential lines of outputs of the LVDS driver inside the DSP.Type: ApplicationFiled: October 15, 2008Publication date: April 23, 2009Inventors: Akira Kitayama, Tatemi Ido, Nobuaki Sato, Hiroharu Sakai, Kouichi Ihara
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Patent number: 7493092Abstract: In a MIMO wireless transceiver, priority control that judges priority of transmit data and a transmission mode table are provided to control an option as to which transmission system SDM or STBC is selected, coding rate and modulation method based on a transmission mode for a transmission destination that is determined by priority of transmission data and status of a communication matrix at the time of data transmission. With such arrangement, a wireless communication system composed of the MIMO wireless transceiver can control coding, MIMO signal processing and modulation methods according to priority of transmit data. More specifically, it is possible to ensure transmission of data having higher priority and improve throughput in total when a plurality of types of data are transmitted.Type: GrantFiled: August 26, 2005Date of Patent: February 17, 2009Assignee: Hitachi, Ltd.Inventors: Masaaki Shida, Tatemi Ido