Patents by Inventor Ravishankar Ajjanagadde Shivarama
Ravishankar Ajjanagadde Shivarama 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: 11495253Abstract: A data storage system may utilize a gimbal test system to find open circuits and short circuits in a head gimbal assembly. The gimbal test system can have a gimbal flexure suspended between a load beam and a data storage medium with a flex circuit physically attached to the gimbal flexure to electrically connect a transducing head to a controller. The flex circuit can be tested with a test via that continuously extends through the flex circuit to a probe portion and a test pad located on an air bearing side of the gimbal flexure. The probe portion can be backed by the gimbal flexure along a plane perpendicular to a recording surface of the data storage medium.Type: GrantFiled: November 16, 2018Date of Patent: November 8, 2022Assignee: Seagate Technology LLCInventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer
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Patent number: 10395679Abstract: A data storage system can employ at least one transducing head that is suspended above a data storage medium to access data. The transducing head suspension can be configured with a resonance system where a gimbal flexure is mounted to a load beam via a physical connection. The gimbal flexure may support a transducing head and contact the load beam via the physical connection, a dimple, and a first contact feature concurrently while the physical connection, dimple, and first contact feature are each separate and different points of physical contact.Type: GrantFiled: December 8, 2017Date of Patent: August 27, 2019Assignee: Seagate Technology LLCInventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer, Razman Zambri
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Publication number: 20190189151Abstract: A slider adhesion system can be practiced in a data storage device with a flexure suspended from a load beam and a slider mounted to a gimbal tongue of the flexure. The slider can be aligned with an aperture of the gimbal tongue and attached to an adhesion feature of the gimbal tongue with an adhesive layer. The adhesion feature may consist of a plurality of cantilevered tabs extending into the aperture of the gimbal tongue.Type: ApplicationFiled: December 20, 2017Publication date: June 20, 2019Inventors: Christopher Unger, Bradley J. Ver Meer, Ravishankar Ajjanagadde Shivarama
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Publication number: 20190180777Abstract: A data storage system can employ at least one transducing head that is suspended above a data storage medium to access data. The transducing head suspension can be configured with a resonance system where a gimbal flexure is mounted to a load beam via a physical connection. The gimbal flexure may support a transducing head and contact the load beam via the physical connection, a dimple, and a first contact feature concurrently while the physical connection, dimple, and first contact feature are each separate and different points of physical contact.Type: ApplicationFiled: December 8, 2017Publication date: June 13, 2019Inventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer, Razman Zambri
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Patent number: 10304483Abstract: A slider adhesion system can be practiced in a data storage device with a flexure suspended from a load beam and a slider mounted to a gimbal tongue of the flexure. The slider can be aligned with an aperture of the gimbal tongue and attached to an adhesion feature of the gimbal tongue with an adhesive layer. The adhesion feature may consist of a plurality of cantilevered tabs extending into the aperture of the gimbal tongue.Type: GrantFiled: December 20, 2017Date of Patent: May 28, 2019Assignee: Seagate Technology LLCInventors: Christopher Unger, Bradley J. Ver Meer, Ravishankar Ajjanagadde Shivarama
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Patent number: 9953669Abstract: 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.Type: GrantFiled: October 18, 2016Date of Patent: April 24, 2018Assignee: Seagate Technology LLCInventors: Jon Karsten Klarqvist, Ravishankar Ajjanagadde Shivarama
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Publication number: 20180108374Abstract: 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.Type: ApplicationFiled: October 18, 2016Publication date: April 19, 2018Inventors: Jon Karsten Klarqvist, Ravishankar Ajjanagadde Shivarama
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Publication number: 20170316796Abstract: 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.Type: ApplicationFiled: April 27, 2016Publication date: November 2, 2017Inventors: Vijay Kumar, Ravishankar Ajjanagadde Shivarama, Taiho Yeom, Razman Zambri, Bradley Ver Meer
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Patent number: 9792936Abstract: 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.Type: GrantFiled: April 27, 2016Date of Patent: October 17, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Vijay Kumar, Ravishankar Ajjanagadde Shivarama, Taiho Yeom, Razman Zambri, Bradley Ver Meer
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Patent number: 9253885Abstract: A flex circuit including a multiple layer structure is disclosed. The multiple layered structure includes a first or top layer and a second or base layer. Top traces and bond pads are fabricated on the top or obverse layer and interlayer traces and bond pads are fabricated between the first and second layers to provide an electrical interconnect to electrical components on a head assembly. In an illustrated embodiment, the flex circuit includes portions including the first or base layer and the second or top layer and one or more reduced thickness portion including the first or base layer and not the second layer.Type: GrantFiled: January 12, 2015Date of Patent: February 2, 2016Assignee: Seagate Technology LLCInventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer, Razman Zambri
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Publication number: 20150332716Abstract: Assemblies and methods that include a flex circuit having a slider facing surface and an opposing back surface; a slider having a back surface and an opposing air bearing surface (ABS), the slider including an electrical connection region; and a through circuit electrical connection, that is in electrical connection with the electrical connection region of the slider, the back surface of the slider interfacing with the slider facing surface of the flex circuit.Type: ApplicationFiled: May 14, 2014Publication date: November 19, 2015Applicant: SEAGATE TECHNOLOGY LLCInventors: Jason B. Gadbois, Bradley Ver Meer, Joseph Stephan, Scott Matzke, Ravishankar Ajjanagadde Shivarama, Christopher Unger
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Patent number: 9171561Abstract: Assemblies and methods that include a flex circuit having a slider facing surface and an opposing back surface; a slider having a back surface and an opposing air bearing surface (ABS), the slider including an electrical connection region; and a through circuit electrical connection, that is in electrical connection with the electrical connection region of the slider, the back surface of the slider interfacing with the slider facing surface of the flex circuit.Type: GrantFiled: May 14, 2014Date of Patent: October 27, 2015Assignee: Seagate Technology LLCInventors: Jason B. Gadbois, Bradley Ver Meer, Joseph Stephan, Scott Matzke, Ravishankar Ajjanagadde Shivarama, Christopher Unger
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Publication number: 20150201493Abstract: A flex circuit including a multiple layer structure is disclosed. The multiple layered structure includes a first or top layer and a second or base layer. Top traces and bond pads are fabricated on the top or obverse layer and interlayer traces and bond pads are fabricated between the first and second layers to provide an electrical interconnect to electrical components on a head assembly. In an illustrated embodiment, the flex circuit includes portions including the first or base layer and the second or top layer and one or more reduced thickness portion including the first or base layer and not the second layer.Type: ApplicationFiled: January 12, 2015Publication date: July 16, 2015Inventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer, Razman Zambri
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Patent number: 9013963Abstract: A flex circuit including a dual sided interconnect structure to connect electrical components on a head or suspension assembly to head circuitry is described. The dual sided interconnect structure described has application for providing an electrical connection to one or more transducer elements on a slider and one or more elements of a heat assisted magnetic recording HAMR unit. In an illustrated embodiment, a flexible structure or insulating base layer includes one or more slider and heat assisted magnetic recording traces coupled to one or more slider or HAMR bond pads on an interconnect portion. As disclosed, the slider bond pads are on the obverse side of the flexible structure and the HAMR bond pads include a reverse side bonding surface to form reverse side bond pads to connect to one or more electrical or heating elements on the HAMR unit.Type: GrantFiled: March 15, 2013Date of Patent: April 21, 2015Assignee: Seagate Technology LLCInventors: Bradley J. Ver Meer, Ravishankar Ajjanagadde Shivarama
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Patent number: 8934200Abstract: A flex circuit including a multiple layer structure is disclosed. The multiple layered structure includes a first or top layer and a second or base layer. Top traces and bond pads are fabricated on the top or obverse layer and interlayer traces and bond pads are fabricated between the first and second layers to provide an electrical interconnect to electrical components on a head assembly. In an illustrated embodiment, the flex circuit includes portions including the first or base layer and the second or top layer and one or more reduced thickness portion including the first or base layer and not the second layer.Type: GrantFiled: March 15, 2013Date of Patent: January 13, 2015Assignee: Seagate Technology LLCInventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer, Razman Zambri
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Patent number: 8705324Abstract: An apparatus has a slider body that includes an upper surface opposed to a media-facing surface. The slider body has an edge joined between the media-facing surface and the upper surface and facing a coupling region. The slider body includes a first bond pad on the edge and a laser submount coupled to the upper surface of the slider body. The laser submount has a second bond pad facing the coupling region. The apparatus includes a trace-gimbal assembly having first and second electrical traces facing the coupling region and electrically coupled to the respective first and second bond pad via first and second solder joints. An extension of the trace-gimbal assembly extends between the first and second solder joints preventing contact therebetween.Type: GrantFiled: March 7, 2013Date of Patent: April 22, 2014Assignee: Seagate Technology LLCInventors: Ravishankar Ajjanagadde Shivarama, Christopher Unger
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Publication number: 20130286801Abstract: A flex circuit including a multiple layer structure is disclosed. The multiple layered structure includes a first or top layer and a second or base layer. Top traces and bond pads are fabricated on the top or obverse layer and interlayer traces and bond pads are fabricated between the first and second layers to provide an electrical interconnect to electrical components on a head assembly. In an illustrated embodiment, the flex circuit includes portions including the first or base layer and the second or top layer and one or more reduced thickness portion including the first or base layer and not the second layer.Type: ApplicationFiled: March 15, 2013Publication date: October 31, 2013Applicant: SEAGATE TECHNOLOGY LLCInventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer, Razman Zambri
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Publication number: 20130286800Abstract: A flex circuit including a dual sided interconnect structure to connect electrical components on a head or suspension assembly to head circuitry is described. The dual sided interconnect structure described has application for providing an electrical connection to one or more transducer elements on a slider and one or more elements of a heat assisted magnetic recording HAMR unit. In an illustrated embodiment, a flexible structure or insulating base layer includes one or more slider and heat assisted magnetic recording traces coupled to one or more slider or HAMR bond pads on an interconnect portion. As disclosed, the slider bond pads are on the obverse side of the flexible structure and the HAMR bond pads include a reverse side bonding surface to form reverse side bond pads to connect to one or more electrical or heating elements on the HAMR unit.Type: ApplicationFiled: March 15, 2013Publication date: October 31, 2013Applicant: Seagate Technology LLCInventors: Bradley J. Ver Meer, Ravishankar Ajjanagadde Shivarama
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Publication number: 20130286803Abstract: An apparatus has a slider body that includes an upper surface opposed to a media-facing surface. The slider body has an edge joined between the media-facing surface and the upper surface and facing a coupling region. The slider body includes a first bond pad on the edge and a laser submount coupled to the upper surface of the slider body. The laser submount has a second bond pad facing the coupling region. The apparatus includes a trace-gimbal assembly having first and second electrical traces facing the coupling region and electrically coupled to the respective first and second bond pad via first and second solder joints. An extension of the trace-gimbal assembly extends between the first and second solder joints preventing contact therebetween.Type: ApplicationFiled: March 7, 2013Publication date: October 31, 2013Applicant: SEAGATE TECHNOLOGY LLCInventors: Ravishankar Ajjanagadde Shivarama, Christopher Unger
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Patent number: 7804656Abstract: An apparatus includes a load beam, a slider coupled to the load beam by a gimbal assembly and including an optical transducer, an optical fiber for transmitting light directly toward the transducer, and a mounting structure for adjusting the position of an end of the optical fiber. Data storage devices that include the apparatus are also included.Type: GrantFiled: February 6, 2008Date of Patent: September 28, 2010Assignee: Seagate Technology LLCInventors: Kevin Arthur Gomez, William Albert Challener, Ravishankar Ajjanagadde Shivarama, Patrick Breckow Chu