Patents by Inventor Yosuke Urakami
Yosuke Urakami 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: 9406316Abstract: The present disclosure generally relates to the structure of a perpendicular magnetic write head for use in a magnetic disk drive. A shingled-microwave-assisted magnetic recording head for use in a high-areal-density hard disk drive comprises a trailing shield, a flare-shaped main pole, one or more side shields, a spin torque oscillator, and two asymmetric side gaps, where one side gap has a smaller width than the other side gap. The spin torque oscillator shares a first continuous edge with the main pole on a side adjacent the side gap having the smaller width and shares a second continuous edge adjacent a media facing surface. The angle of the spin torque oscillator and the main pole formed by the media facing surface and the narrow side gap is greater than about 90°.Type: GrantFiled: May 15, 2014Date of Patent: August 2, 2016Assignee: HGST NETHERLANDS B.V.Inventors: Yosuke Urakami, Masato Shiimoto, Kazue Kudo, Hiromi Shiina
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Publication number: 20150332711Abstract: The present disclosure generally relates to the structure of a perpendicular magnetic write head for use in a magnetic disk drive. A shingled-microwave-assisted magnetic recording head for use in a high-areal-density hard disk drive comprises a trailing shield, a flare-shaped main pole, one or more side shields, a spin torque oscillator, and two asymmetric side gaps, where one side gap has a smaller width than the other side gap. The spin torque oscillator shares a first continuous edge with the main pole on a side adjacent the side gap having the smaller width and shares a second continuous edge adjacent a media facing surface. The angle of the spin torque oscillator and the main pole formed by the media facing surface and the narrow side gap is greater than about 90°.Type: ApplicationFiled: May 15, 2014Publication date: November 19, 2015Applicant: HGST NETHERLANDS B.V.Inventors: Yosuke URAKAMI, Masato SHIIMOTO, Kazue KUDO, Hiromi SHIINA
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Patent number: 9082434Abstract: Embodiments described herein generally relate to a magnetic read head wherein read sensitivity distribution is made asymmetric in the off-track direction. The method of making the magnetic head is also disclosed. The read head may comprise a magneto-resistive effect element with an asymmetric structure around the element in the off-track direction and the read sensitivity profile in the off-track direction may also be asymmetric.Type: GrantFiled: October 30, 2013Date of Patent: July 14, 2015Assignee: HGST NETHERLANDS B.V.Inventors: Jun Aoyama, Hiroyuki Katada, Masato Shiimoto, Mikito Sugiyama, Yosuke Urakami
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Patent number: 9076466Abstract: In one embodiment, a magnetic head includes a main pole adapted for producing a writing magnetic field, a trailing shield positioned on a trailing side of the main pole, wherein a trailing gap is positioned between the trailing shield and the main pole, and a side shield positioned on at least one side of the main pole in a cross-track direction, wherein a side gap is positioned between the side shield and the main pole, wherein the main pole has an asymmetrical shape at an air bearing surface (ABS) thereof. In another embodiment, a method may be employed for forming a magnetic head having a main pole that has an asymmetrical shape at an ABS thereof.Type: GrantFiled: December 20, 2012Date of Patent: July 7, 2015Assignee: HGST Netherlands B.V.Inventors: Yosuke Urakami, Kazue Kudo, Hiromi Shiina, Kaori Suzuki
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Publication number: 20150162024Abstract: In one embodiment, a perpendicular magnetic recording head includes a main pole configured to write data to a magnetic medium, a leading-side magnetic shield positioned on a leading side of the main pole in a down-track direction adjacent a media-facing surface of the head, and a trailing-side magnetic shield positioned on a trailing side of the main pole in the down-track direction adjacent the media-facing surface of the head, wherein a trailing side taper is provided on the trailing side of the main pole in the down-track direction, wherein a leading shield taper is provided on a main pole side of the leading-side magnetic shield, and wherein an angle of the trailing side taper relative to a line extending along an element height direction is less than or equal to an angle of the leading shield taper relative to the line extending along the element height direction.Type: ApplicationFiled: December 10, 2013Publication date: June 11, 2015Applicant: HGST NETHERLANDS B.V.Inventors: Kazue Kudo, Hiromi Shiina, Shouji Tokutake, Yosuke Urakami
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Patent number: 9047889Abstract: In one embodiment, a perpendicular magnetic recording head includes a main pole configured to write data to a magnetic medium, a leading-side magnetic shield positioned on a leading side of the main pole in a down-track direction adjacent a media-facing surface of the head, and a trailing-side magnetic shield positioned on a trailing side of the main pole in the down-track direction adjacent the media-facing surface of the head, wherein a trailing side taper is provided on the trailing side of the main pole in the down-track direction, wherein a leading shield taper is provided on a main pole side of the leading-side magnetic shield, and wherein an angle of the trailing side taper relative to a line extending along an element height direction is less than or equal to an angle of the leading shield taper relative to the line extending along the element height direction.Type: GrantFiled: December 10, 2013Date of Patent: June 2, 2015Assignee: HGST Netherlands B.V.Inventors: Kazue Kudo, Hiromi Shiina, Shouji Tokutake, Yosuke Urakami
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Publication number: 20150116869Abstract: Embodiments described herein generally relate to a magnetic read head wherein read sensitivity distribution is made asymmetric in the off-track direction. The method of making the magnetic head is also disclosed. The read head may comprise a magneto-resistive effect element with an asymmetric structure around the element in the off-track direction and the read sensitivity profile in the off-track direction may also be asymmetric.Type: ApplicationFiled: October 30, 2013Publication date: April 30, 2015Applicant: HGST NETHERLANDS B.V.Inventors: Jun AOYAMA, Hiroyuki KATADA, Masato SHIIMOTO, Mikito SUGIYAMA, Yosuke URAKAMI
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Publication number: 20140177091Abstract: In one embodiment, a magnetic head includes a main pole adapted for producing a writing magnetic field, a trailing shield positioned on a trailing side of the main pole, wherein a trailing gap is positioned between the trailing shield and the main pole, and a side shield positioned on at least one side of the main pole in a cross-track direction, wherein a side gap is positioned between the side shield and the main pole, wherein the main pole has an asymmetrical shape at an air bearing surface (ABS) thereof. In another embodiment, a method may be employed for forming a magnetic head having a main pole that has an asymmetrical shape at an ABS thereof.Type: ApplicationFiled: December 20, 2012Publication date: June 26, 2014Applicant: HGST NETHERLANDS B.V.Inventors: Yosuke Urakami, Kazue Kudo, Hiromi Shiina, Kaori Suzuki
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Patent number: 8472139Abstract: In one embodiment, a magnetic head includes a main pole, a trailing shield positioned near a trailing side of the main pole, a side shield positioned near both sides of the main pole in a cross-track direction, a leading shield positioned near a leading side of the main pole, and a gap positioned between the main pole and the shields, characterized in that Sg1<Sg2, wherein Sg1 is a distance in the cross-track direction between a bending point of a leading edge of the trailing shield and a trailing corner of the main pole nearest to the bending point, and Sg2 is a distance in the cross-track direction between a first point on an edge of the side shield parallel in the cross-track direction to the trailing corner of the main pole and the trailing corner of the main pole nearest to the first point.Type: GrantFiled: September 6, 2011Date of Patent: June 25, 2013Assignee: HGST Netherlands B.V.Inventors: Yosuke Urakami, Kazue Kudo, Hiromi Shiina, Masafumi Mochizuki, Shouji Tokutake
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Publication number: 20130057981Abstract: In one embodiment, a magnetic head includes a main pole, a trailing shield positioned near a trailing side of the main pole, a side shield positioned near both sides of the main pole in a cross-track direction, a leading shield positioned near a leading side of the main pole, and a gap positioned between the main pole and the shields, characterized in that Sg1<Sg2, wherein Sg1 is a distance in the cross-track direction between a bending point of a leading edge of the trailing shield and a trailing corner of the main pole nearest to the bending point, and Sg2 is a distance in the cross-track direction between a first point on an edge of the side shield parallel in the cross-track direction to the trailing corner of the main pole and the trailing corner of the main pole nearest to the first point.Type: ApplicationFiled: September 6, 2011Publication date: March 7, 2013Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yosuke Urakami, Kazue Kudo, Hiromi Shiina, Masafumi Mochizuki, Shouji Tokutake
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Patent number: 8089720Abstract: A hard-disk drive. The hard-disk drive includes a magnetic-recording disk in which tracks adjacent to each other are magnetically separated, a spindle motor which drives the magnetic-recording disk, a magnetic-recording head equipped with write element and read element, an actuator for positioning the magnetic-recording head on a predetermined track on the magnetic-recording disk, and a control unit. The control unit is configured to store information about an over-write-only track that is provided for a plurality of tracks including n consecutive tracks in at least a partial radial area of the magnetic-recording disk and an offset amount. In a radial area of the magnetic disk where the over-write-only track is located, the control unit is configured to record with an offset by an offset amount from a center of a track toward the over-write-only track with respect to n?1 tracks of the plurality of n tracks, excluding the over-write-only track.Type: GrantFiled: August 6, 2009Date of Patent: January 3, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Yosuke Urakami, Jun Ohno, Hideaki Maeda, Hiroyasu Tanabe
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Publication number: 20110069414Abstract: A hard-disk drive. The hard-disk drive includes a magnetic-recording disk in which tracks adjacent to each other are magnetically separated, a spindle motor which drives the magnetic-recording disk, a magnetic-recording head equipped with write element and read element, an actuator for positioning the magnetic-recording head on a predetermined track on the magnetic-recording disk, and a control unit. The control unit is configured to store information about an over-write-only track that is provided for a plurality of tracks including n consecutive tracks in at least a partial radial area of the magnetic-recording disk and an offset amount. In a radial area of the magnetic disk where the over-write-only track is located, the control unit is configured to record with an offset by an offset amount from a center of a track toward the over-write-only track with respect to n?1 tracks of the plurality of n tracks, excluding the over-write-only track.Type: ApplicationFiled: August 6, 2009Publication date: March 24, 2011Inventors: Yosuke URAKAMI, Jun OHNO, Hideaki MAEDA, Hiroyasu TANABE