Patents by Inventor Amit Itagi
Amit Itagi 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: 8953272Abstract: An apparatus includes a waveguide configured to deliver light to a transducer region. The apparatus also includes a plasmonic transducer that has two metal elements configured as side-by-side plates on a substrate-parallel plane with a gap therebetween. The gap is disposed along the substrate-parallel plane and has an input end disposed proximate the transducer region and an output end. The transducer is configured to provide a surface plasmon-enhanced near-field radiation pattern proximate the output end in response to the light received by the waveguide.Type: GrantFiled: September 2, 2014Date of Patent: February 10, 2015Assignee: Seagate Technology LLCInventors: Chubing Peng, Kaizhong Gao, Lien Lee, Amit Itagi, Michael Allen Seigler, Yimin Niu, Sethuraman Jayashankar
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Publication number: 20140369174Abstract: An apparatus includes a waveguide configured to deliver light to a transducer region. The apparatus also includes a plasmonic transducer that has two metal elements configured as side-by-side plates on a substrate-parallel plane with a gap therebetween. The gap is disposed along the substrate-parallel plane and has an input end disposed proximate the transducer region and an output end. The transducer is configured to provide a surface plasmon-enhanced near-field radiation pattern proximate the output end in response to the light received by the waveguide.Type: ApplicationFiled: September 2, 2014Publication date: December 18, 2014Inventors: Chubing Peng, Kaizhong Gao, Lien Lee, Amit Itagi, Michael Allen Seigler, Yimin Niu, Sethuraman Jayashankar
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Patent number: 8824086Abstract: An apparatus includes a waveguide configured to deliver light to a transducer region. The apparatus also includes a plasmonic transducer that has two metal elements configured as side-by-side plates on a substrate-parallel plane with a gap therebetween. The gap is disposed along the substrate-parallel plane and has an input end disposed proximate the transducer region and an output end. The transducer is configured to provide a surface plasmon-enhanced near-field radiation pattern proximate the output end in response to the light received by the waveguide.Type: GrantFiled: May 28, 2013Date of Patent: September 2, 2014Assignee: Seagate Technology LLCInventors: Chubing Peng, Kaizhong Gao, Lien Lee, Amit Itagi, Michael Allen Seigler, Yimin Niu, Sethuraman Jayashankar
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Patent number: 8804468Abstract: A near-field transducer includes a substrate that defines a substrate-parallel plane. The near-field transducer also includes a composite layer deposited on the substrate-parallel plane. The composite layer has a first layer of the plasmonic material and a second layer of an insertion material adjacent the substrate. The insertion material reduces plastic deformation of the near-field transducer at elevated temperatures.Type: GrantFiled: August 15, 2013Date of Patent: August 12, 2014Assignee: Seagate Technology LLCInventors: Tong Zhao, Michael Christopher Kautzky, Amit Itagi, Michael Allen Seigler
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Patent number: 8711662Abstract: An apparatus includes a waveguide shaped to direct light to a focal point, and a near-field transducer positioned adjacent to the focal point, wherein the near-field transducer includes a dielectric component and a metallic component positioned adjacent to at least a portion of the dielectric component. An apparatus includes a waveguide shaped to direct light to a focal point, and a near-field transducer positioned adjacent to the focal point, wherein the near-field transducer includes a first metallic component, a first dielectric layer positioned adjacent to at least a portion of the first metallic component, and a second metallic component positioned adjacent to at least a portion of the first dielectric component.Type: GrantFiled: August 21, 2012Date of Patent: April 29, 2014Assignee: Seagate Technology LLCInventors: Lien Lee, Xuhui Jin, Kaizhong Gao, Amit Itagi, William A. Challener
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Publication number: 20130330573Abstract: A near-field transducer includes a substrate that defines a substrate-parallel plane. The near-field transducer also includes a composite layer deposited on the substrate-parallel plane. The composite layer has a first layer of the plasmonic material and a second layer of an insertion material adjacent the substrate. The insertion material reduces plastic deformation of the near-field transducer at elevated temperatures.Type: ApplicationFiled: August 15, 2013Publication date: December 12, 2013Applicant: Seagate Technology LLCInventors: Tong Zhao, Michael Christopher Kautzky, Amit Itagi, Michael Allen Seigler
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Publication number: 20130294208Abstract: An apparatus includes a waveguide configured to deliver light to a transducer region. The apparatus also includes a plasmonic transducer that has two metal elements configured as side-by-side plates on a substrate-parallel plane with a gap therebetween. The gap is disposed along the substrate-parallel plane and has an input end disposed proximate the transducer region and an output end. The transducer is configured to provide a surface plasmon-enhanced near-field radiation pattern proximate the output end in response to the light received by the waveguide.Type: ApplicationFiled: May 28, 2013Publication date: November 7, 2013Inventors: Chubing Peng, Kaizhong Gao, Lien Lee, Amit Itagi, Michael Allen Seigler, Yimin Niu, Sethuraman Jayashankar
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Patent number: 8576673Abstract: An apparatus includes a waveguide having a core layer, a near field transducer having an end positioned adjacent to a first surface, a first magnetic pole having an end positioned adjacent to the first surface, and a side lobe blocker adjacent to the first surface and having portions on opposite sides of the first magnetic pole and the near field transducer, wherein the side lobe blocker forms an aperture at an end of the core layer adjacent to the first surface.Type: GrantFiled: October 25, 2011Date of Patent: November 5, 2013Assignee: Seagate Technology LLCInventors: Mark Henry Ostrowski, Jie Zou, Amit Itagi, Kaizhong Gao
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Publication number: 20130223196Abstract: An apparatus includes a transducer including a plasmonic funnel having first and second ends with the first end having a smaller cross-sectional area than the second end, and a first section positioned adjacent to the first end of the plasmonic funnel, and a first waveguide having a core, positioned to cause light in the core to excite surface plasmons on the transducer.Type: ApplicationFiled: February 23, 2012Publication date: August 29, 2013Applicant: Seagate Technology LLCInventors: Kaizhong Gao, Michael Allen Seigler, Amit Itagi, Jie Zou
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Patent number: 8514673Abstract: A near-field transducer includes a substrate that defines a substrate-parallel plane. The near-field transducer also includes a composite layer deposited on the substrate-parallel plane. The composite layer has a first layer of the plasmonic material and a second layer of an insertion material adjacent the substrate. The insertion material reduces plastic deformation of the near-field transducer at elevated temperatures.Type: GrantFiled: April 24, 2012Date of Patent: August 20, 2013Assignee: Seagate Technology LLCInventors: Tong Zhao, Michael Christopher Kautzky, Amit Itagi, Michael Allen Seigler
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Publication number: 20130100783Abstract: An apparatus includes a waveguide having a core layer, a near field transducer having an end positioned adjacent to a first surface, a first magnetic pole having an end positioned adjacent to the first surface, and a side lobe blocker adjacent to the first surface and having portions on opposite sides of the first magnetic pole and the near field transducer, wherein the side lobe blocker forms an aperture at an end of the core layer adjacent to the first surface.Type: ApplicationFiled: October 25, 2011Publication date: April 25, 2013Applicant: SEAGATE TECHNOLOGY LLCInventors: Mark Henry Ostrowski, Jie Zou, Amit Itagi, Kaizhong Gao
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Patent number: 8400902Abstract: An apparatus includes a waveguide having a core layer and first and second cladding layers on opposite sides of the core layer, wherein the cladding layers comprise a binary oxide composition. In another example, the cladding layers include a ternary or quaternary combination of oxides and/or oxynitrides. In another example, the cladding layers include a silicon oxynitride.Type: GrantFiled: February 10, 2012Date of Patent: March 19, 2013Assignee: Seagate Technology LLCInventors: Xiaoyue Huang, Michael Christopher Kautzky, Amit Itagi, William Albert Challener, Michael Allen Seigler
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Publication number: 20120170429Abstract: In accordance with certain embodiments, a magnetic head has a coil, which has a lead coil turn positioned between a yoke and an air-bearing surface. In certain embodiments, a magnetic head has a coil, which has a lead coil turn minimally spaced from a main write pole.Type: ApplicationFiled: June 30, 2011Publication date: July 5, 2012Applicant: SEAGATE TECHNOLOGY LLCInventors: Hua Zhou, Jie Zou, Kaizhong Gao, Amit Itagi
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Publication number: 20120140609Abstract: An apparatus includes a waveguide having a core layer and first and second cladding layers on opposite sides of the core layer, wherein the cladding layers comprise a binary oxide composition. In another example, the cladding layers include a ternary or quaternary combination of oxides and/or oxynitrides. In another example, the cladding layers include a silicon oxynitride.Type: ApplicationFiled: February 10, 2012Publication date: June 7, 2012Applicant: SEAGATE TECHNOLOGY LLCInventors: Xiaoyue Huang, Michael Christopher Kautzky, Amit Itagi, William Albert Challener, Michael Allen Seigler
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Patent number: 8149657Abstract: An apparatus includes a waveguide having a core layer and first and second cladding layers on opposite sides of the core layer, wherein the cladding layers comprise a binary oxide composition. In another example, the cladding layers include a ternary or quaternary combination of oxides and/or oxynitrides. In another example, the cladding layers include a silicon oxynitride.Type: GrantFiled: February 23, 2011Date of Patent: April 3, 2012Assignee: Seagate Technology LLCInventors: Xiaoyue Huang, Michael Christopher Kautzky, Amit Itagi, William Albert Challener, Michael Allen Seigler
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Publication number: 20110205864Abstract: An apparatus includes a waveguide having a core layer and first and second cladding layers on opposite sides of the core layer, wherein the cladding layers comprise a binary oxide composition. In another example, the cladding layers include a ternary or quaternary combination of oxides and/or oxynitrides. In another example, the cladding layers include a silicon oxynitride.Type: ApplicationFiled: February 23, 2011Publication date: August 25, 2011Applicant: Seagate Technology LLCInventors: Xiaoyue Huang, Michael Christopher Kautzky, Amit Itagi, William Albert Challener, Michael Allen Seigler
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Patent number: 7773330Abstract: An apparatus for producing an optical spot on the order of 25 nm in a recording media. The apparatus includes an optical transducer comprising a waveguide which defines an aperture adjacent to an air bearing surface of the transducer adjacent a recording media. The transducer includes a protrusion extending beyond the plane of the air bearing surface extending toward the recording media.Type: GrantFiled: April 15, 2005Date of Patent: August 10, 2010Assignee: Seagate Technology LLCInventors: Amit Itagi, Daniel D. Stancil, Tuviah E. Schlesinger, James A. Bain
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Patent number: 7768657Abstract: An optical fly height measurement system includes a planar waveguide, a first diffraction grating for coupling an electromagnetic wave into the planar waveguide wherein the first diffraction grating is positioned for directing the electromagnetic wave towards an air bearing surface of a slider. A second diffraction grating is provided for receiving the electromagnetic wave reflected from the air bearing surface. A detector module and processor are provided to determine the fly height.Type: GrantFiled: August 7, 2007Date of Patent: August 3, 2010Assignee: Seagate Technology LLCInventors: Xuhui Jin, Amit Itagi, William Albert Challener
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Publication number: 20090040531Abstract: An optical fly height measurement system includes a planar waveguide, a first diffraction grating for coupling an electromagnetic wave into the planar waveguide wherein the first diffraction grating is positioned for directing the electromagnetic wave towards an air bearing surface of a slider. A second diffraction grating is provided for receiving the electromagnetic wave reflected from the air bearing surface. A detector module and processor are provided to determine the fly height.Type: ApplicationFiled: August 7, 2007Publication date: February 12, 2009Applicant: Seagate Technology LLCInventors: Xuhui Jin, Amit Itagi, William Albert Challener
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Publication number: 20070115787Abstract: An apparatus comprising a first portion and a second portion wherein the first portion includes sides shaped to direct a guided electromagnetic planar waveguide mode to a focal region outside of the first portion. The second portion is adjacent the first portion and contains at least a part of the focal region. The first portion and the second portion are structured and arranged to provide a depth of focus adjacent to the focal region. The depth of focus may be in the range of about 300 nm to about 2000 nm.Type: ApplicationFiled: November 23, 2005Publication date: May 24, 2007Applicant: Seagate Technology LLCInventors: Amit Itagi, William Challener