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).
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Patent number: 7133258Abstract: 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: GrantFiled: November 15, 2005Date of Patent: November 7, 2006Assignee: Fujitsu LimitedInventor: Ryosuke Koishi
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Patent number: 7095591Abstract: 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: GrantFiled: August 19, 2003Date of Patent: August 22, 2006Assignee: Fujitsu LimitedInventors: Takahiro Imamura, Yukihiro Uematsu, Hitoshi Kanai, Shinji Koganezawa, Ryosuke Koishi, Takeaki Shimanouchi
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Patent number: 7027265Abstract: 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: GrantFiled: February 10, 2004Date of Patent: April 11, 2006Assignee: Fujitsu LimitedInventor: Ryosuke Koishi
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Publication number: 20060061911Abstract: 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: ApplicationFiled: November 15, 2005Publication date: March 23, 2006Inventor: Ryosuke Koishi
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Patent number: 6999283Abstract: 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: GrantFiled: December 8, 2003Date of Patent: February 14, 2006Assignee: Fujitsu LimitedInventor: Ryosuke Koishi
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Patent number: 6992861Abstract: 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: GrantFiled: October 3, 2002Date of Patent: January 31, 2006Assignee: Fujitsu LimitedInventors: Atsushi Suzuki, Ryosuke Koishi, Daisuke Mizutani, Ren Ishikawa, Masashi Takada, Yasuhiro Yoneda
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Patent number: 6940694Abstract: 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: GrantFiled: July 29, 2004Date of Patent: September 6, 2005Assignee: Fujitsu LimitedInventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi, Seizi Yoneoka
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Publication number: 20050002125Abstract: 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: ApplicationFiled: July 29, 2004Publication date: January 6, 2005Inventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi, Seizi Yoneoka
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Patent number: 6801398Abstract: 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: GrantFiled: July 29, 1997Date of Patent: October 5, 2004Assignee: Fujitsu LimitedInventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi, Seizi Yoneoka
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Publication number: 20040156145Abstract: 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: ApplicationFiled: February 10, 2004Publication date: August 12, 2004Applicant: Fujitsu LimitedInventor: Ryosuke Koishi
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Publication number: 20040125503Abstract: 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: ApplicationFiled: December 8, 2003Publication date: July 1, 2004Applicant: Fujitsu LimitedInventor: Ryosuke Koishi
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Patent number: 6754043Abstract: 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: GrantFiled: August 23, 1999Date of Patent: June 22, 2004Assignee: Fujitsu LimitedInventors: Yoshiharu Kasamatsu, Ryosuke Koishi, Takayuki Yamamoto
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Patent number: 6728070Abstract: 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: GrantFiled: December 18, 2000Date of Patent: April 27, 2004Assignee: Fujitsu LimitedInventor: Ryosuke Koishi
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Publication number: 20040032693Abstract: 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: ApplicationFiled: August 19, 2003Publication date: February 19, 2004Applicant: FUJITSU LIMITEDInventors: Takahiro Imamura, Yukihiro Uematsu, Hitoshi Kanai, Shinji Koganezawa, Ryosuke Koishi, Takeaki Shimanouchi
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Patent number: 6683755Abstract: 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: GrantFiled: October 9, 2001Date of Patent: January 27, 2004Assignee: Fujitsu LimitedInventor: Ryosuke Koishi
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Publication number: 20030156346Abstract: 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: ApplicationFiled: October 3, 2002Publication date: August 21, 2003Applicant: FUJITSU LIMITEDInventors: Atsushi Suzuki, Ryosuke Koishi, Daisuke Mizutani, Ren Ishikawa, Masashi Takada, Yasuhiro Yoneda
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Head slider supporting device, disk device and suspension having thermal protection for head IC chip
Patent number: 6583962Abstract: 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: GrantFiled: June 19, 2002Date of Patent: June 24, 2003Assignee: Fujitsu LimitedInventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi -
Publication number: 20030002218Abstract: 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: ApplicationFiled: October 9, 2001Publication date: January 2, 2003Applicant: FUJITSU LIMITEDInventor: Ryosuke Koishi
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Patent number: 6501622Abstract: 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: GrantFiled: September 24, 1999Date of Patent: December 31, 2002Assignee: Fujitsu LimitedInventor: Ryosuke Koishi
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Publication number: 20020159194Abstract: 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: ApplicationFiled: June 19, 2002Publication date: October 31, 2002Applicant: FUJITSU LIMITEDInventors: Takeshi Ohwe, Toru Watanabe, Ryosuke Koishi