Patents by Inventor Ritwik Bhatia
Ritwik Bhatia 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: 10090153Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: GrantFiled: May 18, 2017Date of Patent: October 2, 2018Assignee: Ultratech, Inc.Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Patent number: 9929011Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: GrantFiled: May 17, 2017Date of Patent: March 27, 2018Assignee: Ultratech, Inc.Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Patent number: 9768016Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: GrantFiled: June 25, 2014Date of Patent: September 19, 2017Assignee: Ultratech, Inc.Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Publication number: 20170256394Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: ApplicationFiled: May 18, 2017Publication date: September 7, 2017Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Publication number: 20170250070Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: ApplicationFiled: May 17, 2017Publication date: August 31, 2017Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Publication number: 20170241019Abstract: Methods of performing PE-ALD on a substrate with reduced quartz-based contamination are disclosed. The methods include inductively forming in a quartz plasma tube a hydrogen-based plasma from a feed gas that consists essentially of either hydrogen and nitrogen or hydrogen, argon and nitrogen. The nitrogen constitutes 2 vol % or less of the feed gas. The hydrogen-based plasma includes one or more reactive species. The one or more reactive species in the hydrogen-based plasma are directed to the substrate to cause the one or more reactive species to react with a initial film on the substrate. The trace amounts of nitrogen serve to reduce the amount of quartz-based contamination in the initial film as compared to using no nitrogen in the feed gas.Type: ApplicationFiled: January 27, 2017Publication date: August 24, 2017Applicant: Ultratech, Inc.Inventors: Mark J. Sowa, Adam Bertuch, Ritwik Bhatia
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Patent number: 9691613Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: GrantFiled: June 25, 2014Date of Patent: June 27, 2017Assignee: Ultratech, Inc.Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Patent number: 9633850Abstract: Masking methods for atomic-layer-deposition processes for electrode-based devices are disclosed, wherein solder is used as a masking material. The methods include exposing electrical contact members of an electrical device having an active device region and a barrier layer formed by atomic layer deposition. This includes depositing solder elements on the electrical contact members, then forming the barrier layer using atomic layer deposition, wherein the barrier layer covers the active device region and also covers the solder elements that respectively cover the electrical contact members. The solder elements are then melted, which removes respective portions of the barrier layer covering the solder elements. Similar methods are employed for exposing contacts when forming layered capacitors.Type: GrantFiled: July 14, 2016Date of Patent: April 25, 2017Assignee: Ultratech, Inc.Inventor: Ritwik Bhatia
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Publication number: 20170025272Abstract: Masking methods for atomic-layer-deposition processes for electrode-based devices are disclosed, wherein solder is used as a masking material. The methods include exposing electrical contact members of an electrical device having an active device region and a barrier layer formed by atomic layer deposition. This includes depositing solder elements on the electrical contact members, then forming the barrier layer using atomic layer deposition, wherein the barrier layer covers the active device region and also covers the solder elements that respectively cover the electrical contact members. The solder elements are then melted, which removes respective portions of the barrier layer covering the solder elements. Similar methods are employed for exposing contacts when forming layered capacitors.Type: ApplicationFiled: July 14, 2016Publication date: January 26, 2017Applicant: Ultratech, Inc.Inventor: Ritwik Bhatia
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Publication number: 20160155629Abstract: Method and devices are disclosed for device manufacture of gallium nitride devices by growing a gallium nitride layer on a silicon substrate using Atomic Layer Deposition (ALD) followed by rapid thermal annealing. Gallium nitride is grown directly on silicon or on a barrier layer of aluminum nitride grown on the silicon substrate. One or both layers are thermally processed by rapid thermal annealing. Preferably the ALD process use a reaction temperature below 550° C. and preferable below 350° C. The rapid thermal annealing step raises the temperature of the coating surface to a temperature ranging from 550 to 1500° C. for less than 12 msec.Type: ApplicationFiled: June 25, 2014Publication date: June 2, 2016Applicant: Ultratech, Inc.Inventors: Andrew M. Hawryluk, Ganesh Sundaram, Ritwik Bhatia
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Patent number: 7951730Abstract: Methods for forming silicon nitride hard masks are provided. The silicon nitride hard masks include carbon-doped silicon nitride layers and undoped silicon nitride layers. Carbon-doped silicon nitride layers that are deposited from a mixture comprising a carbon source compound, a silicon source compound, and a nitrogen source in the presence of RF power are provided. Also provided are methods of UV post-treating silicon nitride layers to provide silicon nitride hard masks. The carbon-doped silicon nitride layers and UV post-treated silicon nitride layers have desirable wet etch rates and dry etch rates for hard mask layers.Type: GrantFiled: February 4, 2009Date of Patent: May 31, 2011Assignee: Applied Materials, Inc.Inventors: Ritwik Bhatia, Li-Qun Xia, Chad Peterson, Hichem M'Saad
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Patent number: 7737052Abstract: A dielectric cap, interconnect structure containing the same and related methods are disclosed. The inventive dielectric cap includes a multilayered dielectric material stack wherein at least one layer of the stack has good oxidation resistance, Cu diffusion and/or substantially higher mechanical stability during a post-deposition curing treatment, and including Si—N bonds at the interface of a conductive material such as, for example, Cu. The dielectric cap exhibits a high compressive stress and high modulus and is still remain compressive stress under post-deposition curing treatments for, for example: copper low k back-end-of-line (BEOL) nanoelectronic devices, leading to less film and device cracking and improved reliability.Type: GrantFiled: March 5, 2008Date of Patent: June 15, 2010Assignees: International Business Machines Corporation, Advanced Micro Devices, Inc., Applied Materials, Inc.Inventors: Ritwik Bhatia, Griselda Bonilla, Alfred Grill, Joshua L. Herman, Son Van Nguyen, E. Todd Ryan, Hosadurga Shobha
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Publication number: 20090224374Abstract: A dielectric cap, interconnect structure containing the same and related methods are disclosed. The inventive dielectric cap includes a multilayered dielectric material stack wherein at least one layer of the stack has good oxidation resistance, Cu diffusion and/or substantially higher mechanical stability during a post-deposition curing treatment, and including Si—N bonds at the interface of a conductive material such as, for example, Cu. The dielectric cap exhibits a high compressive stress and high modulus and is still remain compressive stress under post-deposition curing treatments for, for example: copper low k back-end-of-line (BEOL) nanoelectronic devices, leading to less film and device cracking and improved reliability.Type: ApplicationFiled: March 5, 2008Publication date: September 10, 2009Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, ADVANCED MICRO DEVICES, INC., APPLIED MATERIALS, INC.Inventors: Ritwik Bhatia, Griselda Bonilla, Alfred Grill, Joshua L. Herman, Son Van Nguyen, E. Todd Ryan, Hosadurga Shobha
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Publication number: 20090137132Abstract: Methods for forming silicon nitride hard masks are provided. The silicon nitride hard masks include carbon-doped silicon nitride layers and undoped silicon nitride layers. Carbon-doped silicon nitride layers that are deposited from a mixture comprising a carbon source compound, a silicon source compound, and a nitrogen source in the presence of RF power are provided. Also provided are methods of UV post-treating silicon nitride layers to provide silicon nitride hard masks. The carbon-doped silicon nitride layers and UV post-treated silicon nitride layers have desirable wet etch rates and dry etch rates for hard mask layers.Type: ApplicationFiled: February 4, 2009Publication date: May 28, 2009Inventors: Ritwik Bhatia, Li-Qun Xia, Chad Peterson, Hichem M'Saad
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Patent number: 7501355Abstract: Methods for forming silicon nitride hard masks are provided. The silicon nitride hard masks include carbon-doped silicon nitride layers and undoped silicon nitride layers. Carbon-doped silicon nitride layers that are deposited from a mixture comprising a carbon source compound, a silicon source compound, and a nitrogen source in the presence of RF power are provided. Also provided are methods of UV post-treating silicon nitride layers to provide silicon nitride hard masks. The carbon-doped silicon nitride layers and UV post-treated silicon nitride layers have desirable wet etch rates and dry etch rates for hard mask layers.Type: GrantFiled: June 29, 2006Date of Patent: March 10, 2009Assignee: Applied Materials, Inc.Inventors: Ritwik Bhatia, Li-Qun Xia, Chad Peterson, Hichem M'Saad
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Publication number: 20080014761Abstract: Methods for forming silicon nitride hard masks are provided. The silicon nitride hard masks include carbon-doped silicon nitride layers and undoped silicon nitride layers. Carbon-doped silicon nitride layers that are deposited from a mixture comprising a carbon source compound, a silicon source compound, and a nitrogen source in the presence of RF power are provided. Also provided are methods of UV post-treating silicon nitride layers to provide silicon nitride hard masks. The carbon-doped silicon nitride layers and UV post-treated silicon nitride layers have desirable wet etch rates and dry etch rates for hard mask layers.Type: ApplicationFiled: June 29, 2006Publication date: January 17, 2008Inventors: Ritwik Bhatia, Li-Qun Xia, Chad Peterson, Hichem M'Saad
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Patent number: 7132353Abstract: A method of forming a sidewall spacer on a gate electrode is described. The method includes generating a first plasma from a silicon containing precursor and oxide precursor, and forming a silicon oxy-nitride layer on the sidewall of the gate electrode. The method also includes generating a second plasma from the silicon containing precursor and a nitrogen precursor, and forming a nitride layer on the silicon oxy-nitride layer. The silicon containing precursor can flow continuously between the generation of the first and the second plasmas. Also, a method of forming a sidewall spacer on the side of a gate electrode on a substrate. The method includes forming an oxy-nitride layer on the sidewall, and forming a nitride layer on the oxy-nitride layer, where the substrate wafer is not exposed to air between the formation of the layers.Type: GrantFiled: August 2, 2005Date of Patent: November 7, 2006Assignee: Applied Materials, Inc.Inventors: Li-Qun Xia, Mei-Yee Shek, Troy Kim, Vladamir Zubkov, Ritwik Bhatia