公开(公告)号：US10410659B2

公开(公告)日：2019-09-10

申请号：US16272378

申请日：2019-02-11

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  Raul Horacio Andruet ,  James Gary Wessel

IPC: G11B5/17 ,  G11B5/31 ,  G11B5/40 ,  G11B5/187 ,  G11B5/00 ,  G11B5/012

Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.

公开(公告)号：US10255937B1

公开(公告)日：2019-04-09

申请号：US15484261

申请日：2017-04-11

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  Jin Fang ,  Erik J. Hutchinson

IPC: G11B5/60 ,  G11B5/48 ,  G11B5/00

Abstract: A contact sensor is provided at or near an air bearing surface of a slider and having a temperature coefficient of resistance. The contact sensor is coupled to a lead arrangement comprising a first lead and a second lead. The contact sensor comprises a sensor element, a first peripheral wing comprising an inner wing connected to the sensor element and an outer wing connected to the first lead, and a second peripheral wing comprising an inner wing connected to the sensor element and an outer wing connected to the second lead. An electrically conductive overlay covers at least the outer wings of the first and second peripheral wings and some or all of the first and second electrical leads.

公开(公告)号：US09111572B2

公开(公告)日：2015-08-18

申请号：US14287412

申请日：2014-05-27

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  John L. Brand

IPC: G11B21/20 ,  G11B20/10 ,  G11B5/60 ,  G11B13/04 ,  G11B27/36

CPC classification number: G11B5/607 ,  G01K13/00 ,  G11B5/024 ,  G11B5/3133 ,  G11B5/6011 ,  G11B5/6076 ,  G11B7/0948 ,  G11B7/121 ,  G11B20/10 ,  G11B27/36

Abstract: A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.

Abstract translation: 多级传感器位于头部传感器上并被配置为与磁记录介质相互作用。 多级传感器的第一传感器级具有电阻的温度系数。 多级传感器的第二传感器级耦合到第一传感器并具有电阻的温度系数。 第一传感器级被配置为优先地感测相对于第二传感器级的介质的不均匀性，并且第二传感器级被配置为优先地感测与介质相对于第一传感器级的表面的接近和接触。 第一和第二传感器级可以串联或并联连接。

公开(公告)号：US10249328B2

公开(公告)日：2019-04-02

申请号：US15001475

申请日：2016-01-20

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  Raul Horacio Andruet ,  James Gary Wessel

IPC: G11B5/17 ,  G11B5/31 ,  G11B5/40 ,  G11B5/187 ,  G11B5/00 ,  G11B5/012

Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.

公开(公告)号：US09741375B2

公开(公告)日：2017-08-22

申请号：US14946166

申请日：2015-11-19

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  Narayanan Ramakrishnan

IPC: G11B5/60 ,  G11B5/40

CPC classification number: G11B5/40 ,  G11B5/6017 ,  G11B5/607 ,  G11B2005/0021

Abstract: A slider of a magnetic recording head has a leading edge, a trailing edge, and an air bearing surface between the leading and trailing edges. A sensor is situated at the trailing edge of the slider and configured to sense presence of a lube droplet or other contaminant at the trailing edge.

公开(公告)号：US20170206917A1

公开(公告)日：2017-07-20

申请号：US15001475

申请日：2016-01-20

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  Raul Horacio Andruet ,  James Gary Wessel

IPC: G11B5/17 ,  G11B5/60

CPC classification number: G11B5/17 ,  G11B5/012 ,  G11B5/187 ,  G11B5/3106 ,  G11B5/3123 ,  G11B5/3133 ,  G11B5/3136 ,  G11B5/40 ,  G11B2005/0021

Abstract: A slider comprises an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. A writer is provided on the slider and comprises a write coil having a media-facing surface situated at the ABS. Cooling arms project laterally from peripheral surfaces of the write coil and extend along the ABS. The media-facing surface of the write coil and the cooling arms are exposed to the ABS to facilitate increased cooling of the write coil at the ABS.

公开(公告)号：US20160019923A1

公开(公告)日：2016-01-21

申请号：US14827603

申请日：2015-08-17

Applicant: Seagate Technology LLC

Inventor： Manuel Charles Anaya-Dufresne ,  Brian William Karr ,  Gary Joseph Kunkel ,  Zhen Wei

IPC: G11B5/60 ,  G11B5/024 ,  G01K13/00

CPC classification number: G11B5/607 ,  G01K13/00 ,  G11B5/024 ,  G11B5/3133 ,  G11B5/6011 ,  G11B5/6076 ,  G11B7/0948 ,  G11B7/121 ,  G11B20/10 ,  G11B27/36

Abstract: A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cross-sectional area adjacent to the sensor larger than that of the sensor, such that the contact resistance is small relative to the sensor resistance and negligibly contributes to a signal generated by the sensor. A multiplicity of head transducers each support a TCR sensor and a power source can supply bias power to each sensor of each head to maintain each sensor at a fixed temperature above an ambient temperature in the presence of heat transfer changes impacting the sensors. A TCR sensor of a head transducer can include a track-oriented TCR sensor wire for sensing one or both of asperities of the medium.

公开(公告)号：US20140268410A1

公开(公告)日：2014-09-18

申请号：US14287419

申请日：2014-05-27

Applicant: Seagate Technology LLC

Inventor： Gary Joseph Kunkel ,  Huazhou Lou ,  Declan Macken ,  Timothy William Stoebe

IPC: G11B20/10

CPC classification number: G11B5/607 ,  G01K13/00 ,  G11B5/024 ,  G11B5/3133 ,  G11B5/6011 ,  G11B5/6076 ,  G11B7/0948 ,  G11B7/121 ,  G11B20/10 ,  G11B27/36

Abstract: A temperature sensor of a head transducer measures temperature near or at the close point. The measured temperature varies in response to changes in spacing between the head transducer and a magnetic recording medium. A detector is coupled to the temperature sensor and is configured to detect a change in a DC component of the measured temperature indicative of onset of contact between the head transducer and the medium. Another head transducer configuration includes a sensor having a sensing element with a high temperature coefficient of resistance to interact with asperities of the medium. Electrically conductive leads are connected to the sensing element and have a low temperature coefficient of resistance relative to that of the sensing element, such thermally induced resistance changes in the leads have a negligible effect on a response of the sensing element to contact with the asperities.

Abstract translation: 头传感器的温度传感器测量靠近或接近的温度。 测量的温度响应于头部换能器和磁记录介质之间的间隔的变化而变化。 检测器耦合到温度传感器并且被配置为检测指示头部换能器和介质之间的接触开始的测量温度的DC分量的变化。 另一个头部传感器配置包括传感器，该传感器具有具有高温度系数的传感元件，以与介质的粗糙度相互作用。 导电引线连接到感测元件并且具有相对于感测元件的电阻的低温度系数，引线中的这种热感应电阻变化对感测元件与凹凸接触的响应具有可忽略的影响。