公开(公告)号：US20190325904A1

公开(公告)日：2019-10-24

申请号：US16369297

申请日：2019-03-29

Applicant: Seagate Technology LLC

Inventor： Narayanan Ramakrishnan

IPC: G11B5/60 ,  H02N2/08

Abstract: A method includes producing a first surface acoustic wave (SAW) on a magnetic head slider using a first interdigitated transducer (IDT), wherein the SAW has a first set of wave characteristics. The method also includes receiving the first SAW at a second IDT on the magnetic head slider. The method also includes analyzing the SAW for a second set of wave characteristics. The method also includes determining, based on the analyzing, that a substance having at least one characteristic is located in a path of the SAW on the magnetic head slider.

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

IPC: G11B5/48 ,  G11B5/60 ,  G11B5/31

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.

公开(公告)号：US09905255B1

公开(公告)日：2018-02-27

申请号：US15415165

申请日：2017-01-25

Applicant: Seagate Technology LLC

Inventor： Narayanan Ramakrishnan ,  Declan Macken ,  Jason Bryce Gadbois

IPC: G11B5/48 ,  G11B5/31 ,  G11B5/60 ,  G11B5/39 ,  G11B5/00

CPC classification number: G11B5/4853 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/397 ,  G11B5/607 ,  G11B5/6076 ,  G11B2005/0021

Abstract: A slider of a magnetic recording head comprises a ground pad and a plurality of electrical bond pads coupled to bias sources. A component of the slider is coupled between first and second bond pads. A first heater of the slider is coupled between the first bond pad and the ground pad. A second heater of the slider is coupled between the second bond pad and the ground pad. A first diode is disposed on the slider and coupled in series with the first heater. A second diode is disposed on the slider and coupled in series with the second heater.

公开(公告)号：US09905254B1

公开(公告)日：2018-02-27

申请号：US15414234

申请日：2017-01-24

Applicant: Seagate Technology LLC

Inventor： Narayanan Ramakrishnan ,  Declan Macken

IPC: G11B5/48 ,  G11B5/31 ,  G11B5/60 ,  G11B5/39 ,  G11B5/00

CPC classification number: G11B5/4853 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/397 ,  G11B5/607 ,  G11B5/6076 ,  G11B2005/0021

Abstract: A slider of a magnetic recording head includes a ground pad and a plurality of electrical bond pads coupled to bias sources. The plurality of electrical bond pads includes a plurality of shared bond pads. A first component of the slider is coupled to a first bond pad and one of the shared bond pads. The slider includes one or more additional components each coupled to a respective pair of the shared bond pads. A first ground-coupled component of the slider is coupled between one of the shared bond pads and the ground pad. A first diode is disposed on the slider and coupled in series with the first ground-coupled component. A first Zener diode can be disposed on the slider and coupled between the first diode and the ground pad for enhanced ground noise immunity of the powered devices.

公开(公告)号：US09552836B2

公开(公告)日：2017-01-24

申请号：US14139438

申请日：2013-12-23

Applicant: Seagate Technology LLC

Inventor： Narayanan Ramakrishnan ,  Ajaykumar Rajasekharan

IPC: G11B5/60 ,  G11B5/10 ,  G11B5/31

CPC classification number: G11B5/6082 ,  G11B5/10 ,  G11B5/3106 ,  G11B5/6005

Abstract: The present invention is directed to a slider that includes at least one fluid pathway that is in fluid communication with an air bearing face and/or the trailing edge face of the slider. The at least one fluid pathway is configured to propel/transport a fluid such as a lubricant toward at least one side face via capillary action. The present invention is also directed to related apparatuses and methods.

Abstract translation: 本发明涉及一种滑块，其包括与滑动件的空气轴承面和/或后缘面流体连通的至少一个流体通路。 所述至少一个流体通道经配置以通过毛细作用推动/输送诸如润滑剂的流体朝向至少一个侧面。 本发明还涉及相关的装置和方法。

公开(公告)号：US09093098B2

公开(公告)日：2015-07-28

申请号：US13708730

申请日：2012-12-07

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Ajaykumar Rajasekharan ,  Narayanan Ramakrishnan ,  James Ronald Krolnik

IPC: G11B5/60 ,  G11B21/21

CPC classification number: G11B5/6005 ,  G11B5/6082 ,  G11B21/21

Abstract: An apparatus and associated methodology contemplating a slider body defining longitudinal extents at a leading end and a trailing end. A fluid bearing surface is formed in part by a side rail extending substantially longitudinally along the slider body and joined to a cross rail extending substantially laterally along the slider body. The side rail and the cross rail define at least a portion of a positive pressure recess. A vent is defined in the fluid bearing surface that is in fluid communication with ambient pressure fluid on one side of the side rail but is not in fluid communication with the positive pressure recess on the other side of the side rail.

Abstract translation: 一种考虑在前端和后端限定纵向范围的滑块体的装置和相关方法。 流体支承表面部分地由沿着滑块主体大致纵向延伸的侧轨形成并且连接到沿着滑块主体基本上横向延伸的横向轨道。 侧轨和横梁限定正压凹部的至少一部分。 在流体轴承表面中限定出与侧轨一侧的环境压力流体流体连通但不与侧轨的另一侧上的正压凹槽流体连通的通气口。