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公开(公告)号：US10229706B1
公开(公告)日：2019-03-12
申请号：US15960100
申请日：2018-04-23
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Jon Karsten Klarqvist
Abstract: A slider of a heat-assisted magnetic recording head comprises an air bearing surface and an optical waveguide configured to receive light from a laser source. The slider comprises a plurality of electrical bond pads including a first bond pad and a second bond pad. A first resistive sensor is configured to sense for spacing changes and contact between the slider and a magnetic recording medium at or near a first close point of the slider. A second resistive sensor is configured to sense for spacing changes and contact between the slider and the medium at or near a second close point of the slider. A bolometer is situated at a location within the slider that receives at least some of the light communicated along the optical waveguide. The first resistive sensor, the second resistive sensor, and the bolometer are coupled together and between the first and second bond pads.
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公开(公告)号：US10600435B2
公开(公告)日：2020-03-24
申请号：US15813391
申请日：2017-11-15
Applicant: Seagate Technology LLC
Inventor： Jon Karsten Klarqvist
Abstract: A method for programming a head gimbal assembly. The method includes building a plurality of transducers into a slider, and testing the plurality of transducers to select one of the plurality of transducers for field operation. The method also includes providing an interconnect assembly having a plurality of traces with at least one of the plurality of traces having a plurality of electrically coupled bond pads. One of the plurality of bond pads is bonded electrically to the selected transducer out of the plurality of transducers, and the other bond pads of the plurality of bond pads are not electrically coupled to any of the plurality of transducers.
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公开(公告)号：US10410669B1
公开(公告)日：2019-09-10
申请号：US16170462
申请日：2018-10-25
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel , Jon Karsten Klarqvist , John Charles Duda
Abstract: A slider configured for heat-assisted magnetic recording comprises an optical sensor coupled to first and second bond pads. The optical sensor comprises a bolometer and a reference sensor. The bolometer is situated at a location of the slider that receives at least some of the light and exposed to an ambient temperature at the slider. The bolometer produces a signal in response to a change in the ambient temperature and the change in output optical power. The reference sensor is situated at a location of the slider unexposed to the light and exposed to the ambient temperature. The reference sensor is coupled to the bolometer and configured to produce a signal in response to the change in the ambient temperature. The optical sensor is configured to generate a sensor signal indicative of changes in output optical power of a laser source without contribution due to ambient temperature changes.
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公开(公告)号：US10186291B1
公开(公告)日：2019-01-22
申请号：US15603730
申请日：2017-05-24
Applicant: Seagate Technology LLC
Inventor： Narayanan Ramakrishnan , Jon Karsten Klarqvist , James G. Wessel , Declan Macken
Abstract: A head slider for use in a disk drive is movably positionable relative to a magnetic recording disk and includes at least one write element for writing data to the magnetic recording disk. The write element includes a writer coil electrically connected between a first bond pad and a second bond pad, where the connection between the first bond pad and the second bond pad includes a center tap located proximate to a voltage null point. The head slider also includes at least one read element for reading data from the magnetic recording disk, the read element electrically connected between the center tap and a third bond pad, where the write element and the read element are configured to be selectively activated based on biased inputs to the first bond pad, the second bond pad, and the third bond pad.
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公开(公告)号：US09990947B1
公开(公告)日：2018-06-05
申请号：US15789415
申请日：2017-10-20
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Jon Karsten Klarqvist
IPC: G11B5/02 , G11B5/48 , G11B7/1263 , G11B5/00
CPC classification number: G11B5/4853 , G11B5/4866 , G11B7/1263 , G11B2005/0021
Abstract: A slider of a heat-assisted recording head comprises electrical bond pads coupled to bias sources and a ground pad, an air bearing surface, and a waveguide configured to receive light from a laser source. A contact sensor proximate the air bearing surface is coupled between a first bond pad and a second bond pad. A bolometer is coupled to a reference thermal sensor. The bolometer is situated at a slider location that receives at least some of the light communicated along the waveguide. The reference thermal sensor is situated at a slider location unexposed to the light communicated along the waveguide. The bolometer and reference thermal sensor are coupled between the first and second bond pads and in parallel with the contact sensor. A ground connection is coupled to the ground pad and at a connection between the bolometer and the reference thermal sensor.
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Patent Agency Ranking
公开(公告)号：US09953669B1
公开(公告)日：2018-04-24
申请号：US15296510
申请日：2016-10-18
Applicant: Seagate Technology LLC
IPC: G11B5/48
CPC classification number: G11B5/4853
Abstract: A slider for use in a disk drive, the slider including a slider body having a leading surface and an opposite trailing surface, wherein the trailing surface includes portions with extensions or depressions. The extensions or depressions include a slider bond pad.
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公开(公告)号：US20180108374A1
公开(公告)日：2018-04-19
申请号：US15296510
申请日：2016-10-18
Applicant: Seagate Technology LLC
IPC: G11B5/48
CPC classification number: G11B5/4853
Abstract: A slider for use in a disk drive, the slider including a slider body having a leading surface and an opposite trailing surface, wherein the trailing surface includes portions with extensions or depressions. The extensions or depressions include a slider bond pad.
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公开(公告)号：US20190147908A1
公开(公告)日：2019-05-16
申请号：US15813391
申请日：2017-11-15
Applicant: Seagate Technology LLC
Inventor： Jon Karsten Klarqvist
CPC classification number: G11B5/4853 , G11B5/486 , G11B5/6005 , G11B19/02
Abstract: A method for programming a head gimbal assembly. The method includes building a plurality of transducers into a slider, and testing the plurality of transducers to select one of the plurality of transducers for field operation. The method also includes providing an interconnect assembly having a plurality of traces with at least one of the plurality of traces having a plurality of electrically coupled bond pads. One of the plurality of bond pads is bonded electrically to the selected transducer out of the plurality of transducers, and the other bond pads of the plurality of bond pads are not electrically coupled to any of the plurality of transducers.
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公开(公告)号：US10127940B1
公开(公告)日：2018-11-13
申请号：US15342339
申请日：2016-11-03
Applicant: Seagate Technology LLC
Inventor： James Gary Wessel , Jon Karsten Klarqvist , John Charles Duda
Abstract: A slider configured for heat-assisted magnetic recording comprises an optical sensor coupled to first and second bond pads. The optical sensor comprises a bolometer and a reference sensor. The bolometer is situated at a location of the slider that receives at least some of the light and exposed to an ambient temperature at the slider. The bolometer produces a signal in response to a change in the ambient temperature and the change in output optical power. The reference sensor is situated at a location of the slider unexposed to the light and exposed to the ambient temperature. The reference sensor is coupled to the bolometer and configured to produce a signal in response to the change in the ambient temperature. The optical sensor is configured to generate a sensor signal indicative of changes in output optical power of a laser source without contribution due to ambient temperature changes.
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公开(公告)号：US09972350B1
公开(公告)日：2018-05-15
申请号：US15678409
申请日：2017-08-16
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Jon Karsten Klarqvist
CPC classification number: G11B5/6005 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B2005/0021
Abstract: A slider of a heat-assisted magnetic recording head comprises an air bearing surface and an optical waveguide configured to receive light from a laser source. The slider comprises a plurality of electrical bond pads including a first bond pad and a second bond pad. A first resistive sensor is configured to sense for spacing changes and contact between the slider and a magnetic recording medium at or near a first close point of the slider. A second resistive sensor is configured to sense for spacing changes and contact between the slider and the medium at or near a second close point of the slider. A bolometer is situated at a location within the slider that receives at least some of the light communicated along the optical waveguide. The first resistive sensor, the second resistive sensor, and the bolometer are coupled together and between the first and second bond pads.
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