Patents by Inventor Shinya Tokunaga

Shinya Tokunaga 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).

  • Publication number: 20060237852
    Abstract: In the LSI design stage, areas indicating the circuits that handle a minute signal are formed as wiring excluding area patterns. The coordinates of the wiring excluding area patterns in a state that the LSI chip is flipped are calculated, and the substrate design tool is caused to recognize such coordinates. No wiring is provided in the recognized wiring excluding areas when the substrate wirings are designed by the substrate design tool. As a result, the electric coupling between the substrate wirings and the minute signal circuit can be suppressed, and also a malfunction of the circuit can be prevented.
    Type: Application
    Filed: April 25, 2006
    Publication date: October 26, 2006
    Inventors: Mitsumi Ito, Shinya Tokunaga
  • Patent number: 7114144
    Abstract: A method of inspecting a photomask for a semiconductor integrated circuit formed based on drawing pattern data, includes the steps of classifying a drawing pattern of the semiconductor integrated circuit into a plurality of ranks in accordance with a predetermined reference and extracting the same, determining inspecting accuracy for each of the ranks, and deciding quality of the photomask depending on whether the determined inspecting accuracy is satisfied.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: September 26, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinya Tokunaga, Hiroyuki Tsujikawa, Tadashi Tanimoto
  • Publication number: 20060163713
    Abstract: In an SiP constituted by laminating a plurality of chips, it is an object to reduce a thickness of the SiP without damaging a strength of a chip on an upper side and deteriorating a reliability due to dicing in the case in which the chip on the upper side is larger than a chip on a lower side. A spot facing portion is provided by etching in the vicinity of a center of a bottom face of a chip on an upper side having a circuit formation surface to be a top face, and a chip on a lower side is disposed on an inside of the spot facing portion.
    Type: Application
    Filed: January 20, 2006
    Publication date: July 27, 2006
    Inventor: Shinya Tokunaga
  • Patent number: 7077449
    Abstract: A mounting device (30) for mounting a vehicle interior part (20) to a vehicle body 10 includes a first engaging portion (31), a second engaging portion (32), and a movement limiting portion (33). The first engaging portion (31) is engaged and thus fixed to the vehicle body (10) so as to be kept from being disengaged therefrom under a predetermined load. The second engaging portion (32) is engaged and thus fixed to the interior part (20) so as to be disengaged therefrom under the predetermined load. While the second engaging portion (32) is engaged with the interior part (20), the movement limiting portion (33) is kept within an interior space (22) formed in the interior part (20). When the interior part is detached and moves away from the vehicle body (10), the movement limiting portion (33) prevents the interior part (20) from moving away from the vehicle body (10) by a distance exceeding a predetermined value.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: July 18, 2006
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shinya Tokunaga
  • Patent number: 7015611
    Abstract: In a spindle motor, in an upper portion of a stator bearing surrounding wall 32a of a bearing housing 32, a flange 32c projecting outward in the radial direction from the stator bearing surrounding wall 32a is provided, and a tapered face 32e obtained in such a manner that the outer diameter of the bearing housing 32 gradually decreases downward from the flange 32c is formed in the outer face of the stator bearing surrounding wall 32a. A rotor 2 has a yoke 23 facing the bearing housing 32 in the radial direction and the air-fluid boundary is formed in a fifth clearance 40 between the tapered face 32e and the inner face of the yoke 23. By the yoke 23 and the flange 32c which are fit to each other in a non-contact state, a detachment preventing structure is constructed.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: March 21, 2006
    Assignee: Nidec Corporation
    Inventors: Shinya Tokunaga, Mitsuhiro Kurino
  • Publication number: 20050244086
    Abstract: In a radial minute gap between a substantially columnar shaft and an inner peripheral face of a substantially cylindrical sleeve, oil is retained and a radial dynamic pressure bearing is formed. A plurality of recessed portions are arranged in a circumferential direction on at least one of an outer peripheral face of the shaft and the inner peripheral face of the sleeve and a first hill portion is provided to an axial end portion of each the recessed portion. Thus, it is possible to achieve a dynamic pressure bearing with which sufficient radial shaft support can be obtained in spite of a short axial length.
    Type: Application
    Filed: April 28, 2005
    Publication date: November 3, 2005
    Applicant: Nidec Corporation
    Inventors: Itsuo Murata, Harushige Osawa, Ming Feng, Shinya Tokunaga
  • Publication number: 20050156323
    Abstract: In case that a size of an upper layer semiconductor chip is larger than a lower layer semiconductor chip, a semiconductor chip is packed without damaging it. In a semiconductor apparatus in which a second semiconductor chip 103 is laminated on a first semiconductor chip 102, and accommodated in one package, at least one side among four sides which configure an outer edge of the second semiconductor chip 103 is configured in such a manner that it is larger than four sides which configure an outer edge of the first semiconductor chip 102, and thereby, a protruding portion which is protruded from the outer edge of the first semiconductor chip 102 is provided, and a convex supporting part 110 is provided on a surface of a circuit substrate 101 on which the first semiconductor chip 102 and the second semiconductor chip 103 are laminated, and the protruding portion is configured in such a manner that it can be supported by the convex supporting part 110.
    Type: Application
    Filed: December 28, 2004
    Publication date: July 21, 2005
    Inventor: Shinya Tokunaga
  • Patent number: 6914358
    Abstract: In a spindle motor utilizing dynamic-pressure bearings having a full-fill structure, a bearing configuration that balances and sustains at or above atmospheric pressure the internal pressure of the bearing oil. Thrust and radial bearing sections are configured within oil-filled bearing clearances in between the rotor, the shaft, and a shaft-encompassing hollow bearing member. A communicating passage one end of which opens on, radially inwardly along, the thrust bearing section is formed in the bearing member. Either axial ends of the bearing clearance in between the bearing member and shaft communicate through the passage. The communicating passage enables the oil to redistribute itself within the bearing clearances. Pressure difference between the axial upper and lower ends of the oil retained in between the bearing member and the shaft is compensated through the communicating passage, preventing incidents of negative pressure within the oil and of over-lift on the rotor.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: July 5, 2005
    Assignee: Nidec Corporation
    Inventors: Shinya Tokunaga, Kaoru Uenosono, Hideki Nishimura, Yoshito Oku
  • Publication number: 20050127406
    Abstract: A semiconductor integrated circuit device has a plurality of CMOS-type base cells arranged on a semiconductor substrate and m wiring layers, and gate array type logic cells are composed of the base cells and the wiring layers. Wiring within and between the logic cells is constituted by using only upper n (n<m) wiring layers. It becomes possible to shorten a development period and reduce a development cost when a gate array type semiconductor integrated circuit device becomes large in scale.
    Type: Application
    Filed: January 25, 2005
    Publication date: June 16, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinya Tokunaga, Shigeki Furuya, Yuuji Hinatsu
  • Publication number: 20050130520
    Abstract: A hollow-weave airbag is constituted of a bag portion (11) with a 1/1 bag structure, and a closed portion (12) that has two or more weave structures and adjoins the bag portion 11. In addition, the closed portion (12) is constituted of, in sequence from the bag portion side, a first weave structure 12A with a 2/2 structure, a second weave structure 12B with a 1/1 structure, and a third weave structure with a 3/3 structure. Furthermore, the 2/2 structure is constituted of 3 to 5 weft yarns, and the 1/1 structure is constituted of 2 to 5 weft yarns.
    Type: Application
    Filed: March 14, 2003
    Publication date: June 16, 2005
    Inventors: Kazuhiko Mouri, Syuuichi Katou, Hiroyasu Saiki, Eishichi Nakamura, Shinya Tokunaga
  • Publication number: 20050116564
    Abstract: In a spindle motor, in an upper portion of a stator bearing surrounding wall 32a of a bearing housing 32, a flange 32c projecting outward in the radial direction from the stator bearing surrounding wall 32a is provided, and a tapered face 32e obtained in such a manner that the outer diameter of the bearing housing 32 gradually decreases downward from the flange 32c is formed in the outer face of the stator bearing surrounding wall 32a. A rotor 2 has a yoke 23 facing the bearing housing 32 in the radial direction and the air-fluid boundary is formed in a fifth clearance 40 between the tapered face 32e and the inner face of the yoke 23. By the yoke 23 and the flange 32c which are fit to each other in a non-contact state, a detachment preventing structure is constructed.
    Type: Application
    Filed: November 10, 2004
    Publication date: June 2, 2005
    Applicant: NIDEC CORPORATION
    Inventors: Shinya Tokunaga, Mitsuhiro Kurino
  • Publication number: 20040245798
    Abstract: A mounting device (30) for mounting a vehicle interior part (20) to a vehicle body 10 includes a first engaging portion (31), a second engaging portion (32), and a movement limiting portion (33). The first engaging portion (31) is engaged and thus fixed to the vehicle body (10) so as to be kept from being disengaged therefrom under a predetermined load. The second engaging portion (32) is engaged and thus fixed to the interior part (20) so as to be disengaged therefrom under the predetermined load. While the second engaging portion (32) is engaged with the interior part (20), the movement limiting portion (33) is kept within an interior space (22) formed in the interior part (20). When the interior part is detached and moves away from the vehicle body (10), the movement limiting portion (33) prevents the interior part (20) from moving away from the vehicle body (10) by a distance exceeding a predetermined value.
    Type: Application
    Filed: March 26, 2004
    Publication date: December 9, 2004
    Inventor: Shinya Tokunaga
  • Publication number: 20040232664
    Abstract: An air bag system is provided in which an air bag stored in a folded state in a vehicle is adapted to be inflated by a gas supplied from an inflator through a diffuser so as to protect an occupant of the vehicle. In the air bag system, the diffuser is disposed on one side of the inflator such that the diffuser and the inflator are substantially aligned with each other, and the diffuser includes a gas feed portion that is exposed to a gas inlet formed in a generally middle portion of the air bag as viewed in a longitudinal direction thereof.
    Type: Application
    Filed: June 23, 2004
    Publication date: November 25, 2004
    Inventors: Shinya Tokunaga, Mitsuyoshi Ohno
  • Publication number: 20040148584
    Abstract: A method of inspecting a photomask for a semiconductor integrated circuit formed based on drawing pattern data, includes the steps of classifying a drawing pattern of the semiconductor integrated circuit into a plurality of ranks in accordance with a predetermined reference and extracting the same, determining inspecting accuracy for each of the ranks, and deciding quality of the photomask depending on whether the determined inspecting accuracy is satisfied.
    Type: Application
    Filed: November 26, 2003
    Publication date: July 29, 2004
    Inventors: Shinya Tokunaga, Hiroyuki Tsujikawa, Tadashi Tanimoto
  • Patent number: 6768236
    Abstract: Spindle motor utilizing a dynamic-pressure bearing device having a full-fill structure and capable of discharging air bubbles from the lubricating oil after it is charged into the bearing device, as well as air bubbles appearing in the oil due to cavitation in handling. Thrust and radial bearing sections are configured within bearing clearances in between the rotor, the shaft, and a shaft-encompassing hollow bearing member. A communicating passage enabling the oil to redistribute itself within the bearing clearances is formed in the bearing member. At least one ray-like groove that reaches from the radially inward edge of dynamic-pressure-generating grooves in the thrust bearing section to the rim of the shaft-encompassing hollow is furnished in the bearing member. When the motor rotates the air bubbles are stirred and minced by the ray-like groove, and migrate toward release at the single oil-air interface.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: July 27, 2004
    Assignee: Nidec Corporation
    Inventors: Shinya Tokunaga, Kaoru Uenosono
  • Publication number: 20040113501
    Abstract: Spindle motor utilizing a dynamic-pressure bearing device having a full-fill structure and capable of discharging air bubbles from the lubricating oil after it is charged into the bearing device, as well as air bubbles appearing in the oil due to cavitation in handling. Thrust and radial bearing sections are configured within bearing clearances in between the rotor, the shaft, and a shaft-encompassing hollow bearing member. A communicating passage enabling the oil to redistribute itself within the bearing clearances is formed in the bearing member. At least one ray-like groove that reaches from the radially inward edge of dynamic-pressure-generating grooves in the thrust bearing section to the rim of the shaft-encompassing hollow is furnished in the bearing member. When the motor rotates the air bubbles are stirred and minced by the ray-like groove, and migrate toward release at the single oil-air interface.
    Type: Application
    Filed: August 29, 2003
    Publication date: June 17, 2004
    Applicant: NIDEC CORPORATION
    Inventors: Shinya Tokunaga, Kaoru Uenosono
  • Patent number: 6674200
    Abstract: Spindle motor that has high rotational precision and is manufacturable at low cost, and that can be applied even in miniature, low-profile recording-disk drives. The spindle motor includes a shaft having a cone portion, a conic-shaped cavity into which the cone portion is inserted, and only a single dynamic-pressure bearing, formed on the lateral face of the cone portion. The working fluid is oil, and the oil fills without interruption a clearance between the shaft's cone portion and the conical cavity.
    Type: Grant
    Filed: June 22, 2002
    Date of Patent: January 6, 2004
    Assignee: NIDEC Corporation
    Inventor: Shinya Tokunaga
  • Publication number: 20030230943
    Abstract: In a spindle motor utilizing dynamic-pressure bearings having a full-fill structure, a bearing configuration that balances and sustains at or above atmospheric pressure the internal pressure of the bearing oil. Thrust and radial bearing sections are configured within oil-filled bearing clearances in between the rotor, the shaft, and a shaft-encompassing hollow bearing member. A communicating passage one end of which opens on, radially inwardly along, the thrust bearing section is formed in the bearing member. Either axial ends of the bearing clearance in between the bearing member and shaft communicate through the passage. The communicating passage enables the oil to redistribute itself within the bearing clearances. Pressure difference between the axial upper and lower ends of the oil retained in between the bearing member and the shaft is compensated through the communicating passage, preventing incidents of negative pressure within the oil and of over-lift on the rotor.
    Type: Application
    Filed: June 3, 2003
    Publication date: December 18, 2003
    Applicant: NIDEC CORPORATION
    Inventors: Shinya Tokunaga, Kaoru Uenosono, Hideki Nishimura, Yoshito Oku
  • Publication number: 20020195894
    Abstract: Spindle motor that has high rotational precision and is manufacturable at low cost, and that can be applied even in miniature, low-profile recording-disk drives. The spindle motor includes a shaft having a cone portion, a conic-shaped cavity into which the cone portion is inserted, and only a single dynamic-pressure bearing, formed on the lateral face of the cone portion. The working fluid is oil, and the oil fills without interruption a clearance between the shaft's cone portion and the conical cavity.
    Type: Application
    Filed: June 22, 2002
    Publication date: December 26, 2002
    Inventor: Shinya Tokunaga
  • Publication number: 20020043668
    Abstract: A semiconductor integrated circuit device has a plurality of CMOS-type base cells arranged on a semiconductor substrate and m wiring layers, and gate array type logic cells are composed of the base cells and the wiring layers. Wiring within and between the logic cells is constituted by using only upper n (n<m) wiring layers. It becomes possible to shorten a development period and reduce a development cost when a gate array type semiconductor integrated circuit device becomes large in scale.
    Type: Application
    Filed: October 5, 2001
    Publication date: April 18, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinya Tokunaga, Shigeki Furuya, Yuuji Hinatsu