Patents by Inventor Ryosuke Koishi

Ryosuke Koishi 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).

  • Patent number: 7133258
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: November 7, 2006
    Assignee: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Patent number: 7095591
    Abstract: A pair of slits are defined in a slider body of a head slider so as to extend from a trailing end surface to the leading end on the slider body. A movable block is established in the slider body between the slits. The slits ensure the extent of movement for the movable block. Elongated plates enable a relative displacement between the movable block and a stationary block. A head element is mounted on a trailing end surface of the movable block. The thickness of a non-magnetic layer corresponds to the gap length of the head element. The gap length of the head element can easily be controlled based on deposition of the non-magnetic layer. The thickness of the non-magnetic layer can be reduced in a relatively facilitated manner, so that the gap length of the head element can easily be minimized.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: August 22, 2006
    Assignee: Fujitsu Limited
    Inventors: Takahiro Imamura, Yukihiro Uematsu, Hitoshi Kanai, Shinji Koganezawa, Ryosuke Koishi, Takeaki Shimanouchi
  • Patent number: 7027265
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: April 11, 2006
    Assignee: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Publication number: 20060061911
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Application
    Filed: November 15, 2005
    Publication date: March 23, 2006
    Inventor: Ryosuke Koishi
  • Patent number: 6999283
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: February 14, 2006
    Assignee: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Patent number: 6992861
    Abstract: The present invention is aimed to provide a head suspension having a high resonant frequency, high shock resistance and low rigidity, which greatly contributes to an improvement of a magnetic disk apparatus. In an oscillation-type actuator, at least a part of a spring arm of the head suspension having a data reading/writing head slider 1 is made of an anisotropic layer whose rigidity varies in accordance with a direction. In this case, the anisotropic layer is laminated so that the high rigidity modulus orientation direction is different according to layer.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: January 31, 2006
    Assignee: Fujitsu Limited
    Inventors: Atsushi Suzuki, Ryosuke Koishi, Daisuke Mizutani, Ren Ishikawa, Masashi Takada, Yasuhiro Yoneda
  • Patent number: 6940694
    Abstract: A magnetic head assembly equipped with a slider having a magnetic head and a gimbal spring on which the slider is mounted with an adhesive. The gimbal spring is supported by beam portions of a load beam. A thin-film wiring pattern formed on the load beam extends to a surface of the gimbal spring. A tip of the wiring pattern acts as a terminal portion that is connected to input/output terminals integrally formed on the slider. The slider is locked on the gimbal spring by electrically conducting bonding and an adhesive. A plurality of dummy patterns having the same height as the wiring pattern are provided at a position corresponding to where the adhesive is dropped on the surface of the gimbal spring. The adhesive is placed in an area sandwiched by the dummy patterns on the gimbal spring.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: September 6, 2005
    Assignee: Fujitsu Limited
    Inventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi, Seizi Yoneoka
  • Publication number: 20050002125
    Abstract: A magnetic head assembly equipped with a slider and a gimbal spring to which the slider is secured with an adhesive agent. According to one aspect, at least one slit is formed in the gimbal spring opposing the adhesion surface of the slider, so that expansion and contraction of the gimbal spring caused by a change in the temperature is hardly transferred to the slider. According to a second aspect, the Young's modulus after hardening of the adhesive agent applied onto the adhesion surface of the slider is selected to be smaller than about {fraction (1/13000)} of the Young's modulus of the slider material or of the gimbal spring material. According to the first aspect, therefore, the area of the gimbal spring on which the adhesive agent is applied is limited by the slit. According to the second aspect, the Young's modulus of the adhesive agent after hardening is so small that the warping amount of the slider caused by a change in the temperature lies within a predetermined range.
    Type: Application
    Filed: July 29, 2004
    Publication date: January 6, 2005
    Inventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi, Seizi Yoneoka
  • Patent number: 6801398
    Abstract: A magnetic head assembly equipped with a slider and a gimbal spring to which the slider is secured with an adhesive agent. According to one aspect, at least one slit is formed in the gimbal spring opposing the adhesion surface of the slider, so that expansion and contraction of the gimbal spring caused by a change in the temperature is hardly transferred to the slider. According to a second aspect, the Young's modulus after hardening of the adhesive agent applied onto thee adhesion surface of the slider is selected to be smaller than about {fraction (1/13000)} of the Young's modulus of the slider material or of the gimbal spring material. According to the first aspect, therefore, the area of the gimbal spring on which the adhesive agent is applied is limited by the slit. According to the second aspect, the Young's modulus of the adhesive agent after hardening is so small that the warping amount of the slider caused by a change in the temperature lies within a predetermined range.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: October 5, 2004
    Assignee: Fujitsu Limited
    Inventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi, Seizi Yoneoka
  • Publication number: 20040156145
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Application
    Filed: February 10, 2004
    Publication date: August 12, 2004
    Applicant: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Publication number: 20040125503
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Application
    Filed: December 8, 2003
    Publication date: July 1, 2004
    Applicant: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Patent number: 6754043
    Abstract: The head slider mounts a recording/reproducing element and flies over a recording medium with the airflow generated when the recording medium moves. The head slider comprises a slider body having an air inflow end and an air outflow end, a rail projected from the slider body to define an air bearing surface extended to the outflow end, a projection formed on the rail and between the inflow end and the outflow end, and a recess formed at the outflow end of the rail to make narrow the width of the rail. When the recording medium stops, the head slider and the recording medium are in contact at the projection and the air outflow end of the rail. Since the outflow end of the rail is narrow in width, the stiction can be prevented. Moreover, it is unnecessary to form a projection near the outflow end of the rail and thereby the flying height of the recording/reproducing element can be lowered to improve the recording/reproducing sensitivity.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: June 22, 2004
    Assignee: Fujitsu Limited
    Inventors: Yoshiharu Kasamatsu, Ryosuke Koishi, Takayuki Yamamoto
  • Patent number: 6728070
    Abstract: A flying head slider includes a slider body. The upstream or leading end of a bottom surface on the slider body is defined along a first datum line extending in the lateral direction of the slider body. The first datum line may be set perpendicular to the longitudinal centerline of the slider body. The upstream or leading end of the front air bearing surface is defined along a second datum line intersecting the first datum line at a predetermined inclined angle. As the incidence angle of an airflow colliding against a step defined at the leading end of the front air bearing surface gets decreased, the pitch angle of the slider body also gets decreased in the flying head slider during flight.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: April 27, 2004
    Assignee: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Publication number: 20040032693
    Abstract: A pair of slits are defined in a slider body of a head slider so as to extend from a trailing end surface to the leading end on the slider body. A movable block is established in the slider body between the slits. The slits ensure the extent of movement for the movable block. Elongated plates enable a relative displacement between the movable block and a stationary block. A head element is mounted on a trailing end surface of the movable block. The thickness of a non-magnetic layer corresponds to the gap length of the head element. The gap length of the head element can easily be controlled based on deposition of the non-magnetic layer. The thickness of the non-magnetic layer can be reduced in a relatively facilitated manner, so that the gap length of the head element can easily be minimized.
    Type: Application
    Filed: August 19, 2003
    Publication date: February 19, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Takahiro Imamura, Yukihiro Uematsu, Hitoshi Kanai, Shinji Koganezawa, Ryosuke Koishi, Takeaki Shimanouchi
  • Patent number: 6683755
    Abstract: A head slider having a disk opposing surface, an air inlet end, and an air outlet end. The head slider includes a front rail formed on the disk opposing surface in the vicinity of the air inlet end, the front rail having an air bearing surface and a step surface lower in level than the air bearing surface; a transducer formed in the vicinity of the air outlet end; and a first groove for expanding air once compressed by the front rail to generate a negative pressure. The head slider further includes a second groove formed on the step surface near the air inlet end except opposite side portions of the step surface. The step surface reaches the air inlet end at the opposite side portions.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: January 27, 2004
    Assignee: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Publication number: 20030156346
    Abstract: The present invention is aimed to provide a head suspension having a high resonant frequency, high shock resistance and low rigidity, which greatly contributes to an improvement of a magnetic disk apparatus. In an oscillation-type actuator, at least a part of a spring arm of the head suspension having a data reading/writing head slider 1 is made of an anisotropic layer whose rigidity varies in accordance with a direction. In this case, the anisotropic layer is laminated so that the high rigidity modulus orientation direction is different according to layer.
    Type: Application
    Filed: October 3, 2002
    Publication date: August 21, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Atsushi Suzuki, Ryosuke Koishi, Daisuke Mizutani, Ren Ishikawa, Masashi Takada, Yasuhiro Yoneda
  • Patent number: 6583962
    Abstract: A suspension has an extending end and the other end. A head IC chip mounting portion is provided between the extending end and the other end of the suspension. A head slider is loaded on a first surface of the suspension at a position on the side of the extending end with respect to the head IC chip mounting portion, the head slider integrally including a head. A head IC chip is mounted at the head IC chip mounting portion of the suspension. First wiring patterns extend along the suspension between a portion of the suspension, at which portion the head slider is loaded, and the head IC chip mounting portion. Second wiring patterns extend along the suspension between the head IC chip mounting portion and the other end of the suspension. The head IC chip is mounted at the head IC chip mounting portion in a condition in which a certain portion of the head IC chip is positioned on the side of a second surface of the suspension, which second surface is opposite to the first surface.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: June 24, 2003
    Assignee: Fujitsu Limited
    Inventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi
  • Publication number: 20030002218
    Abstract: A head slider having a disk opposing surface, an air inlet end, and an air outlet end. The head slider includes a front rail formed on the disk opposing surface in the vicinity of the air inlet end, the front rail having an air bearing surface and a step surface lower in level than the air bearing surface; a transducer formed in the vicinity of the air outlet end; and a first groove for expanding air once compressed by the front rail to generate a negative pressure. The head slider further includes a second groove formed on the step surface near the air inlet end except opposite side portions of the step surface. The step surface reaches the air inlet end at the opposite side portions.
    Type: Application
    Filed: October 9, 2001
    Publication date: January 2, 2003
    Applicant: FUJITSU LIMITED
    Inventor: Ryosuke Koishi
  • Patent number: 6501622
    Abstract: A head slider, usually employed in a recording disk drive, comprises a chamfered vertex defined at a corner of a polygonal bottom surface surrounded by a contour separated from a contour of an air bearing surface. Even when the chamfered vertex collides with the surface of a recording disk, a scratch or damage may be hardly generated on the surface of the recording disk, as compared with a keen vertex. The recording disk drive employing the head slider may enjoy an improved shock resistance.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: December 31, 2002
    Assignee: Fujitsu Limited
    Inventor: Ryosuke Koishi
  • Publication number: 20020159194
    Abstract: A suspension has an extending end and the other end. A head IC chip mounting portion is provided between the extending end and the other end of the suspension. A head slider is loaded on a first surface of the suspension at a position on the side of the extending end with respect to the head IC chip mounting portion, the head slider integrally including a head. A head IC chip is mounted at the head IC chip mounting portion of the suspension. First wiring patterns extend along the suspension between a portion of the suspension, at which portion the head slider is loaded, and the head IC chip mounting portion. Second wiring patterns extend along the suspension between the head IC chip mounting portion and the other end of the suspension. The head IC chip is mounted at the head IC chip mounting portion in a condition in which a certain portion of the head IC chip is positioned on the side of a second surface of the suspension, which second surface is opposite to the first surface.
    Type: Application
    Filed: June 19, 2002
    Publication date: October 31, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi