Patents by Inventor Srinivas Nemani
Srinivas Nemani 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: 20240301552Abstract: Described herein is a method for performing an atomic layer deposition process to form a silicon doped oxide film on a surface of the substrate. The oxide film may be a hafnium-zirconium oxide film, or a zirconium oxide film. The atomic layer deposition process may include forming the oxide layers and a silicon layer using a hydrogen peroxide as at least one of the precursors used in formation of the oxide layers.Type: ApplicationFiled: March 9, 2023Publication date: September 12, 2024Inventors: Harshil Kashyap, Andrew C. Kummel, Ajay Kumar Yadav, Keith T. Wong, Srinivas Nemani, Ellie Yieh
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Patent number: 12057329Abstract: Semiconductor systems and methods may include methods of performing selective etches that include modifying a material on a semiconductor substrate. The substrate may have at least two exposed materials on a surface of the semiconductor substrate. The methods may include forming a low-power plasma within a processing chamber housing the semiconductor substrate. The low-power plasma may be a radio-frequency (“RF”) plasma, which may be at least partially formed by an RF bias power operating between about 10 W and about 100 W in embodiments. The RF bias power may also be pulsed at a frequency below about 5,000 Hz. The methods may also include etching one of the at least two exposed materials on the surface of the semiconductor substrate at a higher etch rate than a second of the at least two exposed materials on the surface of the semiconductor substrate.Type: GrantFiled: November 30, 2017Date of Patent: August 6, 2024Assignee: Applied Materials, Inc.Inventors: Bhargav Citla, Chentsau Ying, Srinivas Nemani, Viachslav Babayan, Michael Stowell
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Patent number: 11410860Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.Type: GrantFiled: January 8, 2021Date of Patent: August 9, 2022Assignee: Applied Materials, Inc.Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
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Patent number: 11110383Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.Type: GrantFiled: June 9, 2020Date of Patent: September 7, 2021Assignee: Applied Materials, Inc.Inventors: Adib Khan, Qiwei Liang, Sultan Malik, Srinivas Nemani, Rafika Smati, Joseph Ng, John O'Hehir
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Publication number: 20210134618Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.Type: ApplicationFiled: January 8, 2021Publication date: May 6, 2021Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
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Patent number: 10964527Abstract: Methods for removing residuals after a selective deposition process are provided. In one embodiment, the method includes performing a selective deposition process to form a metal containing dielectric material at a first location of a substrate and performing a residual removal process to remove residuals from a second location of the substrate.Type: GrantFiled: May 2, 2019Date of Patent: March 30, 2021Assignee: Applied Materials, Inc.Inventors: Jong Mun Kim, Biao Liu, Cheng Pan, Erica Chen, Chentsau Ying, Srinivas Nemani, Ellie Yieh
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Patent number: 10943779Abstract: Embodiments include methods and systems of 3D structure fill. In one embodiment, a method of filling a trench in a wafer includes performing directional plasma treatment with an ion beam at an angle with respect to a sidewall of the trench to form a treated portion of the sidewall and an untreated bottom of the trench. A material is deposited in the trench. The deposition rate of the material on the treated portion of the sidewall is different than a second deposition rate on the untreated bottom of the trench. In one embodiment, a method includes depositing a material on the wafer, filling a bottom of the trench and forming a layer on a sidewall of the trench and a top surface adjacent to the trench. The method includes etching the layer with an ion beam at an angle with respect to the sidewall.Type: GrantFiled: November 18, 2016Date of Patent: March 9, 2021Assignee: Applied Materials, Inc.Inventors: Ellie Yieh, Ludovic Godet, Srinivas Nemani, Er-Xuan Ping, Gary Dickerson
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Patent number: 10923367Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.Type: GrantFiled: August 21, 2018Date of Patent: February 16, 2021Assignee: Applied Materials, Inc.Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy
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Publication number: 20200368666Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.Type: ApplicationFiled: June 9, 2020Publication date: November 26, 2020Inventors: Adib KHAN, Qiwei LIANG, Sultan MALIK, Srinivas NEMANI, Rafika Smati, Joseph Ng, John O'Hehir
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Patent number: 10790183Abstract: Embodiments described herein generally relate to methods and device structures for horizontal gate all around (hGAA) isolation and fin field effect transistor (FinFET) isolation. A superlattice structure comprising different materials arranged in an alternatingly stacked formation may be formed on a substrate. In one embodiment, at least one of the layers of the superlattice structure is oxidized by a high pressure oxidation process to form a buried oxide layer adjacent the substrate.Type: GrantFiled: May 9, 2019Date of Patent: September 29, 2020Assignee: Applied Materials, Inc.Inventors: Shiyu Sun, Keith Tatseun Wong, Kurtis Leschkies, Namsung Kim, Srinivas Nemani
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Patent number: 10675581Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.Type: GrantFiled: August 6, 2018Date of Patent: June 9, 2020Assignee: Applied Materials, Inc.Inventors: Adib Khan, Qiwei Liang, Sultan Malik, Srinivas Nemani, Rafika Smati, Joseph Ng, John O'Hehir
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Publication number: 20200038797Abstract: Embodiments of the present disclosure relate to gas abatement apparatus and effluent management. The apparatus described herein include a high pressure process chamber and a containment chamber surrounding the process chamber. A high pressure fluid delivery module is in fluid communication with the high pressure process chamber and is configured to deliver a high pressure fluid to the process chamber. An effluent management module includes a muffler assembly to effluent pressure reduction and a plurality of scrubbers provide for treatment of effluent.Type: ApplicationFiled: August 6, 2018Publication date: February 6, 2020Inventors: Adib KHAN, Qiwei LIANG, Sultan MALIK, Srinivas NEMANI, Rafika Smati, Joseph Ng, John O'Hehir
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Patent number: 10549324Abstract: Embodiments of methods and apparatus for removing particles from a surface of a substrate, such as from the backside of the substrate, are provided herein. In some embodiments, an apparatus for removing particles from a surface of a substrate includes: a substrate handler to expose the surface of the substrate; a particle separator to separate particles from the exposed surface of the substrate; a particle transporter to transport the separated particles; and a particle collector to collect the transported particles.Type: GrantFiled: May 8, 2018Date of Patent: February 4, 2020Assignee: APPLIED MATERIALS, INC.Inventors: Sriskantharajah Thirunavukarasu, Jen Sern Lew, Arvind Sundarrajan, Srinivas Nemani
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Publication number: 20190393024Abstract: Methods for removing residuals after a selective deposition process are provided. In one embodiment, the method includes performing a selective deposition process to form a metal containing dielectric material at a first location of a substrate and performing a residual removal process to remove residuals from a second location of the substrate.Type: ApplicationFiled: May 2, 2019Publication date: December 26, 2019Inventors: Jong Mun KIM, Biao LIU, Cheng PAN, Erica CHEN, Chentsau YING, Srinivas NEMANI, Ellie YIEH
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Publication number: 20190371650Abstract: Embodiments described herein generally relate to methods and device structures for horizontal gate all around (hGAA) isolation and fin field effect transistor (FinFET) isolation. A superlattice structure comprising different materials arranged in an alternatingly stacked formation may be formed on a substrate. In one embodiment, at least one of the layers of the superlattice structure is oxidized by a high pressure oxidation process to form a buried oxide layer adjacent the substrate.Type: ApplicationFiled: May 9, 2019Publication date: December 5, 2019Inventors: Shiyu SUN, Keith Tatseun WONG, Kurtis LESCHKIES, Namsung KIM, Srinivas NEMANI
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Patent number: 10475655Abstract: Embodiments of the disclosure relate to selective metal silicide deposition methods. In one embodiment, a substrate having a silicon containing surface is heated and the silicon containing surface is hydrogen terminated. The substrate is exposed to sequential cycles of a MoF6 precursor and a Si2H6 precursor which is followed by an additional Si2H6 overdose exposure to selectively deposit a MoSix material comprising MoSi2 on the silicon containing surface of the substrate.Type: GrantFiled: May 24, 2018Date of Patent: November 12, 2019Assignees: Applied Materials, Inc., The Regents of the University of CaliforniaInventors: Raymond Hung, Namsung Kim, Srinivas Nemani, Ellie Yieh, Jong Choi, Christopher Ahles, Andrew Kummel
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Publication number: 20180358244Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.Type: ApplicationFiled: August 21, 2018Publication date: December 13, 2018Inventors: Dmitry LUBOMIRSKY, Srinivas NEMANI, Ellie YIEH, Sergey G. BELOSTOTSKIY
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Publication number: 20180342395Abstract: Embodiments of the disclosure relate to selective metal silicide deposition methods. In one embodiment, a substrate having a silicon containing surface is heated and the silicon containing surface is hydrogen terminated. The substrate is exposed to sequential cycles of a MoF6 precursor and a Si2H6 precursor which is followed by an additional Si2H6 overdose exposure to selectively deposit a MoSix material comprising MoSi2 on the silicon containing surface of the substrate.Type: ApplicationFiled: May 24, 2018Publication date: November 29, 2018Inventors: Raymond HUNG, Namsung KIM, Srinivas NEMANI, Ellie YIEH, Jong CHOI, Christopher AHLES, Andrew KUMMEL
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Patent number: 10096466Abstract: Methods of processing a substrate are provided herein. In some embodiments, a method of processing a substrate disposed in a processing chamber includes: (a) depositing a layer of material on a substrate by exposing the substrate to a first reactive species generated from a remote plasma source and to a first precursor, wherein the first reactive species reacts with the first precursor; and (b) treating all, or substantially all, of the deposited layer of material by exposing the substrate to a plasma generated within the processing chamber from a second plasma source; wherein at least one of the remote plasma source or the second plasma source is pulsed to control periods of depositing and periods of treating.Type: GrantFiled: March 17, 2016Date of Patent: October 9, 2018Assignee: APPLIED MATERIALS, INC.Inventors: Jun Xue, Ludovic Godet, Srinivas Nemani, Michael W. Stowell, Qiwei Liang, Douglas A. Buchberger
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Patent number: 10096496Abstract: Methods and process chambers for etching of low-k and other dielectric films are described. For example, a method includes modifying portions of the low-k dielectric layer with a plasma process. The modified portions of the low-k dielectric layer are etched selectively over a mask layer and unmodified portions of the low-k dielectric layer. Etch chambers having multiple chamber regions for alternately generating distinct plasmas are described. In embodiments, a first charge coupled plasma source is provided to generate an ion flux to a workpiece in one operational mode, while a secondary plasma source is provided to provide reactive species flux without significant ion flux to the workpiece in another operational mode. A controller operates to cycle the operational modes repeatedly over time to remove a desired cumulative amount of the dielectric material.Type: GrantFiled: April 24, 2017Date of Patent: October 9, 2018Assignee: Applied Materials, Inc.Inventors: Dmitry Lubomirsky, Srinivas Nemani, Ellie Yieh, Sergey G. Belostotskiy