Patents by Inventor Randhir P. S. Thakur
Randhir P. S. Thakur 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: 9879341Abstract: Embodiments described herein provide a remote plasma system utilizing a microwave source. Additionally, generation and deposition techniques for 2D transition metal chalcogenides with large area uniformity utilizing microwave assisted generation of radicals is disclosed. Plasma may be generated remotely utilizing the microwave source. A processing platform configured to deposit 2D transition metal chalcogenides is also disclosed.Type: GrantFiled: June 21, 2016Date of Patent: January 30, 2018Assignee: Applied Materials, Inc.Inventors: Kaushal K. Singh, Deepak Jadhav, Ashutosh Agarwal, Ashish Goel, Vijay Parihar, Er-Xuan Ping, Randhir P. S. Thakur
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Publication number: 20160372351Abstract: Embodiments described herein provide a remote plasma system utilizing a microwave source. Additionally, generation and deposition techniques for 2D transition metal chalcogenides with large area uniformity utilizing microwave assisted generation of radicals is disclosed. Plasma may be generated remotely utilizing the microwave source. A processing platform configured to deposit 2D transition metal chalcogenides is also disclosed.Type: ApplicationFiled: June 21, 2016Publication date: December 22, 2016Inventors: Kaushal K. SINGH, Deepak JADHAV, Ashutosh AGARWAL, Ashish GOEL, Vijay PARIHAR, Er-Xuan PING, Randhir P.S. THAKUR
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Patent number: 8822259Abstract: Embodiments of the invention generally relate to solar cell devices and methods for manufacturing such solar cell devices. In one embodiment, a method for forming a solar cell device includes depositing a conversion layer over a first surface of a substrate, depositing a first transparent conductive oxide layer over a second surface of the substrate that is opposite the first surface, depositing a first p-doped silicon layer over the first transparent conductive oxide layer, depositing a first intrinsic silicon layer over the first p-doped silicon layer, and depositing a first n-doped silicon layer over the first intrinsic silicon layer. The method further includes depositing a second transparent conductive oxide layer over the first n-doped silicon layer, and depositing an electrically conductive contact layer over the second transparent conductive oxide layer.Type: GrantFiled: April 15, 2011Date of Patent: September 2, 2014Assignee: Applied Materials, Inc.Inventors: Kaushal K. Singh, Robert Visser, Vijay Parihar, Randhir P. S. Thakur
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Publication number: 20140003800Abstract: A method and apparatus for rapid thermal annealing comprising a plurality of lamps affixed to a lid of the chamber that provide at least one wavelength of light, a laser source extending into the chamber, a substrate support positioned within a base of the chamber, an edge ring affixed to the substrate support, and a gas distribution assembly in communication with the lid and the base of the chamber. A method and apparatus for rapid thermal annealing comprising a plurality of lamps comprising regional control of the lamps and a cooling gas distribution system affixed to a lid of the chamber, a heated substrate support with magnetic levitation extending through a base of the chamber, an edge ring affixed to the substrate support, and a gas distribution assembly in communication with the lid and the base of the chamber.Type: ApplicationFiled: August 30, 2013Publication date: January 2, 2014Inventors: Sundar RAMAMURTHY, Andreas G. HEGEDUS, Randhir P.S. THAKUR
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Patent number: 8288683Abstract: A dynamic surface anneal apparatus for annealing a semiconductor workpiece has a workpiece support for supporting a workpiece, an optical source and scanning apparatus for scanning the optical source and the workpiece support relative to one another along a fast axis. The optical source includes an array of laser emitters arranged generally in successive rows of the emitters, the rows being transverse to the fast axis. Plural collimating lenslets overlie respective ones of the rows of emitters and provide collimation along the fast axis. The selected lenslets have one or a succession of optical deflection angles corresponding to beam deflections along the fast axis for respective rows of emitters. Optics focus light from the array of laser emitters onto a surface of the workpiece to form a succession of line beams transverse to the fast axis spaced along the fast axis in accordance with the succession of deflection angles.Type: GrantFiled: November 4, 2008Date of Patent: October 16, 2012Assignee: Applied Materials, Inc.Inventors: Dean Jennings, Abhilash J. Mayur, Timothy N. Thomas, Vijay Parihar, Vedapuram S. Achutharaman, Randhir P. S. Thakur
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Publication number: 20120208345Abstract: The present invention relates to methods for forming microelectronic structures in a semiconductor substrate. The method includes selectively removing dielectric material to expose a portion of an oxide overlying a semiconductor substrate. Insulating material may be formed substantially conformably over the oxide and remaining portions of the dielectric material. Spacers may be formed from the insulating material. An isolation trench etch follows the spacer etch. An optional thermal oxidation of the surfaces in the isolation trench may be performed, which may optionally be followed by doping of the bottom of the isolation trench to further isolate neighboring active regions on either side of the isolation trench. A conformal material may be formed substantially conformably over the spacer, over the remaining portions of the dielectric material, and substantially filling the isolation trench. Planarization of the conformal material may follow.Type: ApplicationFiled: April 24, 2012Publication date: August 16, 2012Applicant: MICRON TECHNOLOGY, INC.Inventors: Fernando Gonzalez, David Chapek, Randhir P.S. Thakur
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Patent number: 8202806Abstract: A method of fabricating an integrated circuit having reduced threshold voltage shift is provided. A nonconducting region is formed on the semiconductor substrate and active regions are formed on the semiconductor substrate. The active regions are separated by the nonconducting region. A barrier layer and a dielectric layer are deposited over the nonconducting region and over the active regions. Heat is applied to the integrated circuit causing the barrier layer to anneal.Type: GrantFiled: October 3, 2005Date of Patent: June 19, 2012Assignee: Micron Technology, Inc.Inventors: Randhir P.S. Thakur, Ravi Iyer, Howard Rhodes
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Patent number: 8173517Abstract: The present invention relates to methods for forming microelectronic structures in a semiconductor substrate. The method includes selectively removing dielectric material to expose a portion of an oxide overlying a semiconductor substrate. Insulating material may be formed substantially conformably over the oxide and remaining portions of the dielectric material. Spacers may be formed from the insulating material. An isolation trench etch follows the spacer etch. An optional thermal oxidation of the surfaces in the isolation trench may be performed, which may optionally be followed by doping of the bottom of the isolation trench to further isolate neighboring active regions on either side of the isolation trench. A conformal material may be formed substantially conformably over the spacer, over the remaining portions of the dielectric material, and substantially filling the isolation trench. Planarization of the conformal material may follow.Type: GrantFiled: July 1, 2010Date of Patent: May 8, 2012Assignee: Micron Technology, Inc.Inventors: Fernando Gonzalez, David L. Chapek, Randhir P. S. Thakur
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Patent number: 8123860Abstract: An apparatus for cyclical depositing of thin films on semiconductor substrates, comprising a process chamber having a gas distribution system with separate paths for process gases and an exhaust system synchronized with operation of valves dosing the process gases into a reaction region of the chamber.Type: GrantFiled: October 30, 2008Date of Patent: February 28, 2012Assignee: Applied Materials, Inc.Inventors: Randhir P. S. Thakur, Alfred W. Mak, Ming Xi, Walter Benjamin Glenn, Ahmad A. Khan, Ayad A. Al-Shaikh, Avgerinos V. Gelatos, Salvador P. Umotoy
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Patent number: 8117987Abstract: Methods and apparatus for hot wire chemical vapor deposition (HWCVD) are provided herein. In some embodiments, an inline HWCVD tool may include a linear conveyor for moving a substrate through the linear process tool; and a multiplicity of HWCVD sources, the multiplicity of HWCVD sources being positioned parallel to and spaced apart from the linear conveyor and configured to deposit material on the surface of the substrate as the substrate moves along the linear conveyor; wherein the substrate is coated by the multiplicity of HWCVD sources without breaking vacuum. In some embodiments, methods of coating substrates may include depositing a first material from an HWCVD source on a substrate moving through a first deposition chamber; moving the substrate from the first deposition chamber to a second deposition chamber; and depositing a second material from a second HWCVD source on the substrate moving through the second deposition chamber.Type: GrantFiled: August 31, 2010Date of Patent: February 21, 2012Assignee: Applied Materials, Inc.Inventors: Dieter Haas, Pravin K. Narwankar, Randhir P. S. Thakur
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Publication number: 20110263068Abstract: Embodiments of the invention generally relate to solar cell devices and methods for manufacturing such solar cell devices. In one embodiment, a method for forming a solar cell device includes depositing a conversion layer over a first surface of a substrate, depositing a first transparent conductive oxide layer over a second surface of the substrate that is opposite the first surface, depositing a first p-doped silicon layer over the first transparent conductive oxide layer, depositing a first intrinsic silicon layer over the first p-doped silicon layer, and depositing a first n-doped silicon layer over the first intrinsic silicon layer. The method further includes depositing a second transparent conductive oxide layer over the first n-doped silicon layer, and depositing an electrically conductive contact layer over the second transparent conductive oxide layer.Type: ApplicationFiled: April 15, 2011Publication date: October 27, 2011Applicant: APPLIED MATERIALS, INC.Inventors: KAUSHAL K. SINGH, Robert Visser, Vijay Parihar, Randhir P. S. Thakur
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Patent number: 7989864Abstract: Structures and methods for making a semiconductor structure are discussed. The semiconductor structure includes a rough surface having protrusions formed from an undoped silicon film. If the semiconductor structure is a capacitor, the protrusions help to increase the capacitance of the capacitor. The semiconductor structure also includes a relatively smooth surface abutting the rough surface, wherein the relatively smooth surface is formed from a polycrystalline material.Type: GrantFiled: August 10, 2009Date of Patent: August 2, 2011Assignee: Micron Technology, Inc.Inventors: Randhir P. S. Thakur, Garry A. Mercaldi, Michael Nuttall, Shenline Chen, Er-Xuan Ping
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Publication number: 20110104848Abstract: Methods and apparatus for hot wire chemical vapor deposition (HWCVD) are provided herein. In some embodiments, an inline HWCVD tool may include a linear conveyor for moving a substrate through the linear process tool; and a multiplicity of HWCVD sources, the multiplicity of HWCVD sources being positioned parallel to and spaced apart from the linear conveyor and configured to deposit material on the surface of the substrate as the substrate moves along the linear conveyor; wherein the substrate is coated by the multiplicity of HWCVD sources without breaking vacuum. In some embodiments, methods of coating substrates may include depositing a first material from an HWCVD source on a substrate moving through a first deposition chamber; moving the substrate from the first deposition chamber to a second deposition chamber; and depositing a second material from a second HWCVD source on the substrate moving through the second deposition chamber.Type: ApplicationFiled: August 31, 2010Publication date: May 5, 2011Applicant: APPLIED MATERIALS, INC.Inventors: DIETER HAAS, PRAVIN K. NARWANKAR, RANDHIR P.S. THAKUR
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Publication number: 20100273309Abstract: The present invention relates to methods for forming microelectronic structures in a semiconductor substrate. The method includes selectively removing dielectric material to expose a portion of an oxide overlying a semiconductor substrate. Insulating material may be formed substantially conformably over the oxide and remaining portions of the dielectric material. Spacers may be formed from the insulating material. An isolation trench etch follows the spacer etch. An optional thermal oxidation of the surfaces in the isolation trench may be performed, which may optionally be followed by doping of the bottom of the isolation trench to further isolate neighboring active regions on either side of the isolation trench. A conformal material may be formed substantially conformably over the spacer, over the remaining portions of the dielectric material, and substantially filling the isolation trench. Planarization of the conformal material may follow.Type: ApplicationFiled: July 1, 2010Publication date: October 28, 2010Applicant: Micron Technology, Inc.Inventors: Fernando Gonzalez, David Chapek, Randhir P.S. Thakur
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Patent number: 7745309Abstract: Methods for promoting interface bonding energy utilized in SOI technology are provided. In one embodiment, the method for promoting interface bonding energy includes providing a first substrate and a second substrate, wherein the first substrate has a silicon oxide layer formed thereon and a cleavage plane defined therein, performing a dry cleaning process on a surface of the silicon oxide layer and a surface of the second substrate, and bonding the cleaned silicon oxide surface of the first substrate to the cleaned surface of the second substrate.Type: GrantFiled: August 9, 2006Date of Patent: June 29, 2010Assignee: Applied Materials, Inc.Inventors: Randhir P S Thakur, Stephen Moffatt, Per-Ove Hansson, Steve Ghanayem
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Patent number: 7674999Abstract: A dynamic surface anneal apparatus for annealing a semiconductor workpiece has a workpiece support for supporting a workpiece, an optical source and scanning apparatus for scanning the optical source and the workpiece support relative to one another along a fast axis. The optical source includes an array of laser emitters arranged generally in successive rows of the emitters, the rows being transverse to the fast axis. Plural collimating lenslets overlie respective ones of the rows of emitters and provide collimation along the fast axis. The selected lenslets have one or a succession of optical deflection angles corresponding to beam deflections along the fast axis for respective rows of emitters. Optics focus light from the array of laser emitters onto a surface of the workpiece to form a succession of line beams transverse to the fast axis spaced along the fast axis in accordance with the succession of deflection angles.Type: GrantFiled: August 23, 2006Date of Patent: March 9, 2010Assignee: Applied Materials, Inc.Inventors: Dean Jennings, Abhilash J. Mayur, Timothy N. Thomas, Vijay Parihar, Vedapuram S. Achutharaman, Randhir P. S. Thakur
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Publication number: 20090294819Abstract: Structures and methods for making a semiconductor structure are discussed. The semiconductor structure includes a rough surface having protrusions formed from an undoped silicon film. If the semiconductor structure is a capacitor, the protrusions help to increase the capacitance of the capacitor. The semiconductor structure also includes a relatively smooth surface abutting the rough surface, wherein the relatively smooth surface is formed from a polycrystalline material.Type: ApplicationFiled: August 10, 2009Publication date: December 3, 2009Inventors: Randhir P.S. Thakur, Garry A. Mercaldi, Michael Nuttall, Shenlin Chen, Er-Xuan Ping
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Patent number: 7618901Abstract: This invention is embodied in an improved process for growing high-quality silicon dioxide layers on silicon by subjecting it to a gaseous mixture of nitrous oxide (N2O) and ozone (O3). The presence of O3 in the oxidizing ambiance greatly enhances the oxidation rate compared to an ambiance in which N2O is the only oxidizing agent. In addition to enhancing the oxidation rate of silicon, it is hypothesized that the presence of O3 interferes with the growth of a thin silicon oxynitride layer near the interface of the silicon dioxide layer and the unreacted silicon surface which makes oxidation in the presence of N2O alone virtually self-limiting The presence of O3 in the oxidizing ambiance does not impair oxide reliability, as is the case when silicon is oxidized with N2O in the presence of a strong, fluorine-containing oxidizing agent such as NF3 or SF6.Type: GrantFiled: May 4, 2007Date of Patent: November 17, 2009Assignee: Micron Technology, Inc.Inventors: Gurtej Singh Sandhu, Randhir P S Thakur
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Patent number: 7576380Abstract: Structures and methods for making a semiconductor structure are discussed. The semiconductor structure includes a rough surface having protrusions formed from an undoped silicon film. If the semiconductor structure is a capacitor, the protrusions help to increase the capacitance of the capacitor. The semiconductor structure also includes a relatively smooth surface abutting the rough surface, wherein the relatively smooth surface is formed from a polycrystalline material.Type: GrantFiled: August 9, 2006Date of Patent: August 18, 2009Assignee: Micron Technology, Inc.Inventors: Randhir P. S. Thakur, Garry A. Mercaldi, Michael Nuttall, Shenline Chen, Er-Xuan Ping
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Publication number: 20090152247Abstract: A dynamic surface anneal apparatus for annealing a semiconductor workpiece has a workpiece support for supporting a workpiece, an optical source and scanning apparatus for scanning the optical source and the workpiece support relative to one another along a fast axis. The optical source includes an array of laser emitters arranged generally in successive rows of the emitters, the rows being transverse to the fast axis. Plural collimating lenslets overlie respective ones of the rows of emitters and provide collimation along the fast axis. The selected lenslets have one or a succession of optical deflection angles corresponding to beam deflections along the fast axis for respective rows of emitters. Optics focus light from the array of laser emitters onto a surface of the workpiece to form a succession of line beams transverse to the fast axis spaced along the fast axis in accordance with the succession of deflection angles.Type: ApplicationFiled: November 4, 2008Publication date: June 18, 2009Inventors: Dean Jennings, Abhilash J. Mayur, Timothy N. Thomas, Vijay Parihar, Vedapuram S. Achutharaman, Randhir P.S. Thakur