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公开(公告)号：US20180130493A1
公开(公告)日：2018-05-10
申请号：US15694387
申请日：2017-09-01
Applicant: Seagate Technology, LLC
Inventor： Vijay Kumar , Narayanan Ramakrishnan
CPC classification number: G11B20/10268 , G11B5/4826 , G11B5/483 , G11B5/5552 , G11B5/5573
Abstract: Apparatus and method contemplating an in-situ test method for a head gimbal assembly (HGA). The method includes individually exciting a pair of opposing-effect microactuators supporting the read/write head adjacent a data storage media; summing the outputs from the microactuators to derive a spectral frequency response of the HGA; determining a resonant frequency from the spectral frequency response; driving the microactuators at the resonant frequency; and varying the read/write fly height apart from the data storage media to correlate contact with a maximum response of the microactuators.
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公开(公告)号：US20160217821A1
公开(公告)日：2016-07-28
申请号：US15012571
申请日：2016-02-01
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Vijay Kumar , Narayanan Ramakrishnan
CPC classification number: G11B20/10268 , G11B5/4826 , G11B5/483 , G11B5/5552 , G11B5/5573
Abstract: An apparatus and associated method contemplating a head gimbal assembly (HGA) and a bridge circuit including first and second microactuators attached to the HGA. Computation logic is connected to the bridge circuit and configured to independently measure an electrical output of each microactuator and to sum the electrical outputs to derive a value related to a vertically dominant modulation mode of the HGA.
Abstract translation: 一种考虑头部万向节组件（HGA）的装置和相关方法以及包括连接到HGA的第一和第二微致动器的桥接电路。 计算逻辑连接到桥式电路，并被配置为独立地测量每个微型致动器的电输出，并且对电气输出求和以得到与HGA的垂直主导调制模式相关的值。
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公开(公告)号：US09053729B1
公开(公告)日：2015-06-09
申请号：US14338485
申请日：2014-07-23
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Vijay Kumar , Ravishankar A. Shivarama
CPC classification number: G11B5/6011 , G11B5/54 , G11B5/6058 , G11B5/607 , G11B5/6076
Abstract: Various embodiments of a method of detecting a contact event between a head and a storage medium, and a storage device that utilizes such method are disclosed. In one or more embodiments, the method includes applying an input signal to an actuator of a head of a storage device; identifying a frequency of the input signal; detecting an output signal in response to the input signal; and detecting a contact event between the head and a storage medium of the storage device if the output signal includes an even harmonic frequency and an odd harmonic frequency of the frequency of the input signal.
Abstract translation: 公开了检测头与存储介质之间的接触事件的方法以及利用这种方法的存储装置的各种实施例。 在一个或多个实施例中，该方法包括将输入信号施加到存储装置的头部的致动器; 识别输入信号的频率; 响应于所述输入信号检测输出信号; 以及如果所述输出信号包括所述输入信号的频率的偶次谐波频率和奇数谐波频率，则检测所述存储设备的磁头与存储介质之间的接触事件。
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公开(公告)号：US20180096701A1
公开(公告)日：2018-04-05
申请号：US15281264
申请日：2016-09-30
Applicant: Seagate Technology LLC
Inventor： Vijay Kumar , Razman Zambri
IPC: G11B5/48
CPC classification number: G11B5/4853 , G11B5/483 , G11B5/4833 , G11B5/5552 , G11B5/6058
Abstract: A data storage device may employ a suspension that positions a transducing head proximal a data storage medium. The suspension can consist of an active fiber composite that spans a portion of a loadbeam. The active fiber composite can be configured with at least one active fiber contacting a supporting layer.
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公开(公告)号：US09953668B1
公开(公告)日：2018-04-24
申请号：US15281264
申请日：2016-09-30
Applicant: Seagate Technology LLC
Inventor： Vijay Kumar , Razman Zambri
CPC classification number: G11B5/4853 , G11B5/483 , G11B5/4833 , G11B5/5552 , G11B5/6058
Abstract: A data storage device may employ a suspension that positions a transducing head proximal a data storage medium. The suspension can consist of an active fiber composite that spans a portion of a loadbeam. The active fiber composite can be configured with at least one active fiber contacting a supporting layer.
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Patent Agency Ranking
公开(公告)号：US10014027B2
公开(公告)日：2018-07-03
申请号：US15694387
申请日：2017-09-01
Applicant: Seagate Technology, LLC
Inventor： Vijay Kumar , Narayanan Ramakrishnan
CPC classification number: G11B20/10268 , G11B5/4826 , G11B5/483 , G11B5/5552 , G11B5/5573
Abstract: Apparatus and method contemplating an in-situ test method for a head gimbal assembly (HGA). The method includes individually exciting a pair of opposing-effect microactuators supporting the read/write head adjacent a data storage media; summing the outputs from the microactuators to derive a spectral frequency response of the HGA; determining a resonant frequency from the spectral frequency response; driving the microactuators at the resonant frequency; and varying the read/write fly height apart from the data storage media to correlate contact with a maximum response of the microactuators.
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公开(公告)号：US09754620B2
公开(公告)日：2017-09-05
申请号：US15012571
申请日：2016-02-01
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Vijay Kumar , Narayanan Ramakrishnan
CPC classification number: G11B20/10268 , G11B5/4826 , G11B5/483 , G11B5/5552 , G11B5/5573
Abstract: An apparatus and associated method contemplating a head gimbal assembly (HGA) and a bridge circuit including first and second microactuators attached to the HGA. Computation logic is connected to the bridge circuit and configured to independently measure an electrical output of each microactuator and to sum the electrical outputs to derive a value related to a vertically dominant modulation mode of the HGA.
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公开(公告)号：US20170316796A1
公开(公告)日：2017-11-02
申请号：US15139421
申请日：2016-04-27
Applicant: Seagate Technology LLC
Inventor： Vijay Kumar , Ravishankar Ajjanagadde Shivarama , Taiho Yeom , Razman Zambri , Bradley Ver Meer
CPC classification number: G11B5/483 , G11B5/4833 , G11B5/4853 , G11B5/4873 , G11B5/5552
Abstract: A gimbal assembly includes a flex circuit with a first end extending along a loadbeam and second end having bond pads configured to be electrically coupled to a slider. The gimbal assembly includes a metallic layer with a fixed portion fixably attached to the loadbeam and a movable portion fixably attachable to the slider. The movable portion has at least one extension arm coupled to and providing support to the second end of the flex circuit. First and second linear actuators are coupled between the fixed portion and the movable portion. The first and second linear actuators cause a rotation of the slider in response to an electric signal.
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公开(公告)号：US09805750B1
公开(公告)日：2017-10-31
申请号：US15192407
申请日：2016-06-24
Applicant: Seagate Technology LLC
Inventor： Narayanan Ramakrishnan , Vijay Kumar
IPC: G11B5/48
CPC classification number: G11B5/4833 , G11B5/484
Abstract: A data storage device can have a suspension with a loadbeam. The loadbeam can be configured with one or more a stiffening features. The loadbeam and stiffening feature may be constructed as products of a single piece of material. The stiffening feature can be defined by a varying thickness of the loadbeam.
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公开(公告)号：US09792936B1
公开(公告)日：2017-10-17
申请号：US15139421
申请日：2016-04-27
Applicant: Seagate Technology LLC
Inventor： Vijay Kumar , Ravishankar Ajjanagadde Shivarama , Taiho Yeom , Razman Zambri , Bradley Ver Meer
CPC classification number: G11B5/483 , G11B5/4833 , G11B5/4853 , G11B5/4873 , G11B5/5552
Abstract: A gimbal assembly includes a flex circuit with a first end extending along a loadbeam and second end having bond pads configured to be electrically coupled to a slider. The gimbal assembly includes a metallic layer with a fixed portion fixably attached to the loadbeam and a movable portion fixably attachable to the slider. The movable portion has at least one extension arm coupled to and providing support to the second end of the flex circuit. First and second linear actuators are coupled between the fixed portion and the movable portion. The first and second linear actuators cause a rotation of the slider in response to an electric signal.
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