Patents by Inventor Nag B. Patibandla
Nag B. Patibandla 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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Publication number: 20250201790Abstract: A method for manufacturing micro-LED displays includes depositing a first material over a substrate having a plurality of micro-LEDs such that the plurality of micro-LEDs are covered by the first material and the first material fills gaps laterally separating the micro-LEDs, removing a portion of the first material from the gaps that laterally separate the plurality of micro-LEDs to form trenches that extend to or below light-emitting layers of the micro-LEDs, depositing a second material over the substrate such that the second material covers the first material and extends into the trenches, and removing a portion of the first and second material over the plurality of micro-LEDs to expose top surfaces of the plurality of micro-LEDs and such that isolation walls positioned in the gaps between the plurality of micro-LEDs extend vertically higher than the top surface of the first material.Type: ApplicationFiled: February 10, 2025Publication date: June 19, 2025Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
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Patent number: 12317758Abstract: A superconducting nanowire single photon detector (SNSPD) device includes a substrate having a top surface, an optical waveguide on the top surface of the substrate to receive light propagating substantially parallel to the top surface of the substrate, a seed layer of metal nitride on the optical waveguide, and a superconductive wire on the seed layer. The superconductive wire is a metal nitride different from the metal nitride of the seed layer and is optically coupled to the optical waveguide.Type: GrantFiled: May 10, 2023Date of Patent: May 27, 2025Assignee: Applied Materials, Inc.Inventors: Zihao Yang, Mingwei Zhu, Nag B. Patibandla, Nir Yahav, Robert Jan Visser, Adi de la Zerda
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Publication number: 20250167190Abstract: A display screen includes a backplane, an array of light-emitting diodes electrically integrated with the backplane, the array of light-emitting diodes configured to emit UV light in a first wavelength range, and a plurality of isolation walls formed on the backplane between adjacent light-emitting diodes of the array of light-emitting diodes with the isolation walls spaced apart from the light-emitting diodes and extending above the light-emitting diodes. The plurality of isolation walls include a core of a first material and a coating covering at least a portion of the core extending above the light-emitting diodes. The coating is an opaque second material having transmittance less than 1% of light in the first wavelength range.Type: ApplicationFiled: January 23, 2025Publication date: May 22, 2025Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
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Patent number: 12283647Abstract: A photocurable composition includes quantum dots, quantum dot precursor materials, a chelating agent, one or more monomers, and a photoinitiator. The quantum dots are selected to emit radiation in a first wavelength band in the visible light range in response to absorption of radiation in a second wavelength band in the UV or visible light range. The second wavelength band is different than the first wavelength band. The quantum dot precursor materials include metal atoms or metal ions corresponding to metal components present in the quantum dots. The chelating agent is configured to chelate the quantum dot precursor materials. The photoinitiator initiates polymerization of the one or more monomers in response to absorption of radiation in the second wavelength band.Type: GrantFiled: February 16, 2024Date of Patent: April 22, 2025Assignee: Applied Materials, Inc.Inventors: Yingdong Luo, Daihua Zhang, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Patent number: 12243864Abstract: A display screen includes a backplane, an array of light-emitting diodes electrically integrated with the backplane, the array of light-emitting diodes configured to emit UV light in a first wavelength range, and a plurality of isolation walls formed on the backplane between adjacent light-emitting diodes of the array of light-emitting diodes with the isolation walls spaced apart from the light-emitting diodes and extending above the light-emitting diodes. The plurality of isolation walls include a core of a first material and a coating covering at least a portion of the core extending above the light-emitting diodes. The coating is an opaque second material having transmittance less than 1% of light in the first wavelength range.Type: GrantFiled: November 16, 2023Date of Patent: March 4, 2025Assignee: Applied Materials, Inc.Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
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Patent number: 12237445Abstract: A method of fabricating a multi-color display includes forming a host matrix over a display having an array of light emitting diodes. The host matrix is sensitive to ultraviolet light. A first plurality of light emitting diodes in a first plurality of wells are activated to illuminate a portion of the host matrix to cause the portion of the host matrix to develop internal porous structures. A first photo-curable fluid including a first color conversion agent is dispensed. The first plurality of light emitting diodes in the first plurality of wells are activated to illuminate and cure the first photo-curable fluid to form a first color conversion layer over each of the first plurality of light emitting diodes, and an uncured remainder of the first photo-curable fluid is removed.Type: GrantFiled: March 10, 2022Date of Patent: February 25, 2025Assignee: Applied Materials, Inc.Inventors: Hou T. Ng, Nag B. Patibandla, Giorgio Cellere, Daihua Zhang
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Publication number: 20250056920Abstract: The present disclosure provides devices and methods for repairing dice during micro-LED display fabrication. The devices include a backplane. The backplane has a plurality of backplane electrodes. Each backplane electrode includes a first material. A plurality of micro-LEDs having a plurality of micro-LED electrodes is included in the device. Each micro-LED electrode includes a second material. Each micro-LED electrode is bonded to each backplane electrode with an alloy of the first material and the second material therebetween. At least one backplane electrode is bonded to the micro-LED electrode via a repair material. The device includes a plurality of subpixel isolation (SI) structures formed over the backplane. The SI structures define wells of sub-pixels. Each well includes a respective micro-LED between adjacent SI structures. The sub-pixels have a color conversion material disposed in the wells.Type: ApplicationFiled: August 7, 2024Publication date: February 13, 2025Inventors: Peiwen LIU, Uma SRIDHAR, Hyunsung BANG, Kai DING, Jeffrey L. FRANKLIN, Mingwei ZHU, Hou T. NG, Nag B. PATIBANDLA
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Patent number: 12224272Abstract: A method for manufacturing micro-LED displays includes depositing a first material over a substrate having a plurality of micro-LEDs such that the plurality of micro-LEDs are covered by the first material and the first material fills gaps laterally separating the micro-LEDs, removing a portion of the first material from the gaps that laterally separate the plurality of micro-LEDs to form trenches that extend to or below light-emitting layers of the micro-LEDs, depositing a second material over the substrate such that the second material covers the first material and extends into the trenches, and removing a portion of the first and second material over the plurality of micro-LEDs to expose top surfaces of the plurality of micro-LEDs and such that isolation walls positioned in the gaps between the plurality of micro-LEDs extend vertically higher than the top surface of the first material.Type: GrantFiled: March 22, 2022Date of Patent: February 11, 2025Assignee: Applied Materials, Inc.Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
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Patent number: 12185643Abstract: A superconducting device includes a substrate, a metal oxide or metal oxynitride seed layer on the substrate, and a metal nitride superconductive layer disposed directly on the seed layer. The seed layer is an oxide or oxynitride of a first metal, and the superconductive layer is a nitride of a different second metal.Type: GrantFiled: March 1, 2023Date of Patent: December 31, 2024Assignee: Applied Materials, Inc.Inventors: Zihao Yang, Mingwei Zhu, Shriram Mangipudi, Mohammad Kamruzzaman Chowdhury, Shane Lavan, Zhebo Chen, Yong Cao, Nag B. Patibandla
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Publication number: 20240363392Abstract: A multi-color display includes a backplane having backplane circuitry, an array of micro-LEDs electrically integrated with backplane circuitry of the backplane, a color conversion layer over each of a plurality of light emitting diodes, and a plurality of isolation walls separating adjacent micro-LEDs of the array.Type: ApplicationFiled: July 8, 2024Publication date: October 31, 2024Inventors: Daihua Zhang, Yingdong Luo, Mingwei Zhu, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Patent number: 12096701Abstract: A method of fabricating a device including a superconductive layer includes depositing a seed layer on a substrate, exposing the seed layer to an oxygen-containing gas or plasma to form a modified seed layer, and after exposing the seed layer to the oxygen-containing gas or plasma depositing a metal nitride superconductive layer directly on the modified seed layer. The seed layer is a nitride of a first metal, and the superconductive layer is a nitride of a different second metal.Type: GrantFiled: May 22, 2023Date of Patent: September 17, 2024Assignee: Applied Materials, Inc.Inventors: Zihao Yang, Mingwei Zhu, Shriram Mangipudi, Mohammad Kamruzzaman Chowdhury, Shane Lavan, Zhebo Chen, Yong Cao, Nag B. Patibandla
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Patent number: 12062735Abstract: An LED display fabrication tool includes a plurality of process chambers and a plurality of transfer chambers. The plurality of process chambers include first and second dispensing chambers to deliver first and second color conversion precursors onto a workpiece for fabrication of a light emitting diode (LED) displays, and first and second washing/drying chambers to remove uncured portions of the first and second color conversion precursors from the workpiece and then dries the workpiece. The plurality of transfer chambers are coupled to two process chambers by two respective sealable ports. First and second curing stations cure the precursors to form the first and second color conversion layers over a first set of LEDs on the workpiece.Type: GrantFiled: March 9, 2022Date of Patent: August 13, 2024Assignee: Applied Materials, Inc.Inventors: Hou T. Ng, Daihua Zhang, Nag B. Patibandla
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Patent number: 12052935Abstract: A method of fabricating a device including a superconductive layer includes depositing a seed layer on a substrate at a first temperature, the seed layer being a nitride of a first metal, reducing the temperature of the substrate to a second temperature that is lower than the first temperature, increasing the temperature of the substrate to a third temperature that is higher than the first temperature to form a modified seed layer, and depositing a metal nitride superconductive layer directly on the modified seed layer at the third temperature, the superconductive layer being a nitride of a different second metal.Type: GrantFiled: February 17, 2021Date of Patent: July 30, 2024Assignee: Applied Materials, Inc.Inventors: Zihao Yang, Mingwei Zhu, Shriram Mangipudi, Mohammad Kamruzzaman Chowdhury, Shane Lavan, Zhebo Chen, Yong Cao, Nag B. Patibandla
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Publication number: 20240234655Abstract: Embodiments of the present disclosure generally relate to LED pixels and methods of fabricating LED pixels. A device includes a backplane, at least three LEDs disposed on the backplane, subpixel isolation (SI) structures disposed defining wells of at least three subpixels, a reflection material is disposed on sidewalls and a top surface of the SI structures, at least three of the subpixels have a color conversion material disposed in the wells, an encapsulation layer disposed over the subpixel isolation structures and the subpixels, a light filter layer disposed over the encapsulation layer and micro-lenses disposed over the light filter layer and over each of the wells of the subpixels.Type: ApplicationFiled: October 20, 2023Publication date: July 11, 2024Inventors: Zhiyong LI, Sivapackia GANAPATHIAPPAN, Mingwei ZHU, Nag B. PATIBANDLA, Hou T. NG, Lisong XU, Ding KAI, Kulandaivelu SIVANANDAN
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Patent number: 12033887Abstract: A multi-color display includes a backplane having backplane circuitry, an array of micro-LEDs electrically integrated with backplane circuitry of the backplane, a color conversion layer over each of a plurality of light emitting diodes, and a plurality of isolation walls separating adjacent micro-LEDs of the array.Type: GrantFiled: July 7, 2023Date of Patent: July 9, 2024Assignee: Applied Materials, Inc.Inventors: Daihua Zhang, Yingdong Luo, Mingwei Zhu, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Patent number: 12023853Abstract: A polishing article manufacturing system includes a feed section and a take-up section, the take-up section comprising a supply roll having a polishing article disposed thereon for a chemical mechanical polishing process, a print section comprising a plurality of printheads disposed between the feed section and the take-up section, and a curing section disposed between the feed section and the take-up section, the curing section comprising one or both of a thermal curing device and an electromagnetic curing device.Type: GrantFiled: December 2, 2019Date of Patent: July 2, 2024Assignee: Applied Materials, Inc.Inventors: Kasiraman Krishnan, Daniel Redfield, Russell Edward Perry, Gregory E. Menk, Rajeev Bajaj, Fred C. Redeker, Nag B. Patibandla, Mahendra C. Orilall, Jason G. Fung
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Publication number: 20240194837Abstract: A display includes a light emitting diode and a color conversion layer that includes a polymer matrix, a blue photoluminescent material, and a components of a photoinitiator that initiated polymerization to form the polymer matrix. The blue photoluminescent material is selected to absorb ultraviolet light with a maximum wavelength in a range of about 300 nm to about 430 nm and to emit blue light. The blue photoluminescent material also has an emission peak in a range of about 420 nm to about 480 nm. The full width at half maximum of the emission peak is less than 100 nm, and the photoluminescence quantum yield is in a range of 5% to 100%.Type: ApplicationFiled: February 23, 2024Publication date: June 13, 2024Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla
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Publication number: 20240194836Abstract: A photocurable composition includes quantum dots, quantum dot precursor materials, a chelating agent, one or more monomers, and a photoinitiator. The quantum dots are selected to emit radiation in a first wavelength band in the visible light range in response to absorption of radiation in a second wavelength band in the UV or visible light range. The second wavelength band is different than the first wavelength band. The quantum dot precursor materials include metal atoms or metal ions corresponding to metal components present in the quantum dots. The chelating agent is configured to chelate the quantum dot precursor materials. The photoinitiator initiates polymerization of the one or more monomers in response to absorption of radiation in the second wavelength band.Type: ApplicationFiled: February 16, 2024Publication date: June 13, 2024Inventors: Yingdong Luo, Daihua Zhang, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Patent number: 11980992Abstract: Embodiments described herein relate to integrated abrasive (IA) polishing pads, and methods of manufacturing IA polishing pads using, at least in part, surface functionalized abrasive particles in an additive manufacturing process, such as a 3D inkjet printing process. In one embodiment, a method of forming a polishing article includes dispensing a first plurality of droplets of a first precursor, curing the first plurality of droplets to form a first layer comprising a portion of a sub-polishing element, dispensing a second plurality of droplets of the first precursor and a second precursor onto the first layer, and curing the second plurality of droplets to form a second layer comprising portions of the sub-polishing element and portions of a plurality of polishing elements. Here, the second precursor includes functionalized abrasive particles having a polymerizable group chemically bonded to surfaces thereof.Type: GrantFiled: September 16, 2022Date of Patent: May 14, 2024Assignee: Applied Materials, Inc.Inventors: Ashavani Kumar, Ashwin Chockalingam, Sivapackia Ganapathiappan, Rajeev Bajaj, Boyi Fu, Daniel Redfield, Nag B. Patibandla, Mario Dagio Cornejo, Amritanshu Sinha, Yan Zhao, Ranga Rao Arnepalli, Fred C. Redeker
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Publication number: 20240145624Abstract: A pixel herein includes a color panel, a light emitting diode (LED) panel, and an adhesive layer disposed between the color panel and the LED panel. The color panel includes a transparent layer, a plurality of sub-pixel isolation structures, and a plurality of black matrix structures disposed between the plurality of sub-pixel isolation structures and the transparent layer. The sub-pixel isolation structures define a plurality color conversion wells of plurality of sub-pixels. A color conversion material is disposed in the color conversion well. The plurality of black matrix structures define a plurality of color resist wells of the plurality of sub-pixels. A color resist is disposed in the color resist wells. The LED panel includes a plurality of micro-LEDs disposed on a backplane. The plurality of micro-LEDs correspond to a sub-pixel.Type: ApplicationFiled: October 24, 2023Publication date: May 2, 2024Inventors: Peiwen LIU, Hyunsung BANG, Jianfeng SUN, Lisong XU, Zhiyong LI, Sivapackia GANAPATHIAPPAN, Mingwei ZHU, Hou T. NG, Nag. B. PATIBANDLA