Patents by Inventor Kartik Ramaswamy

Kartik Ramaswamy 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).

  • Patent number: 11967483
    Abstract: Embodiments provided herein generally include apparatus, plasma processing systems and methods for generation of a waveform for plasma processing of a substrate in a processing chamber. One embodiment includes a waveform generator having a voltage source selectively coupled to an output node, where the output node is configured to be coupled to an electrode disposed within a processing chamber, and where the output node is selectively coupled to a ground node. The waveform generator may also include a radio frequency (RF) signal generator, and a first filter coupled between the RF signal generator and the output node.
    Type: Grant
    Filed: June 2, 2021
    Date of Patent: April 23, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Yang Yang, Yue Guo, Kartik Ramaswamy
  • Publication number: 20240120178
    Abstract: Embodiments provided herein generally include apparatus and methods in a plasma processing system for rapid and inexpensive repair and replacement of RF sensors necessary for the operation of radio frequency (RF) power generation and impedance matching equipment used for generating a plasma in a plasma chamber during semiconductor processing therein. Flexible communications between equipment of the plasma processing system allows sharing of process information and equipment settings for batch processing of a plurality of semiconductor wafers during the manufacturing process. Operational settings of a master plasma processing system may be used to control the operation of a plurality of slave processing systems. In addition, the operational settings of the master plasma processing system may be recorded and reused for controlling the plurality of slave processing systems.
    Type: Application
    Filed: October 10, 2022
    Publication date: April 11, 2024
    Inventors: Yue GUO, Kartik RAMASWAMY, Farhad MOGHADAM, Yang YANG
  • Publication number: 20240118328
    Abstract: Embodiments of the disclosure include an electric field measurement system that includes a first light source, a first light sensor configured to receive electromagnetic energy transmitted from the first light source, an electro-optic sensor, and a controller. The electro-optic sensor may include a package comprising a first electro-optic crystal disposed within a body; and at least one optical fiber. The optical fiber is configured to transmit electromagnetic energy transmitted from the first light source to a surface of the first electro-optic crystal, and transmit at least a portion of the electromagnetic energy transmitted to the surface of the first electro-optic crystal and subsequently passed through at least a portion of the first electro-optic crystal to the first light sensor that is configured to generate a signal based on an attribute of the electromagnetic energy received by the first light sensor from the at least one optical fiber.
    Type: Application
    Filed: October 5, 2022
    Publication date: April 11, 2024
    Inventors: Yue GUO, Yang YANG, Kartik RAMASWAMY, Fernando SILVEIRA, A N M Wasekul AZAD
  • Patent number: 11948826
    Abstract: An electrostatic chuck is described that has radio frequency coupling suitable for use in high power plasma environments. In some examples, the chuck includes a base plate, a top plate, a first electrode in the top plate proximate the top surface of the top plate to electrostatically grip a workpiece, and a second electrode in the top plate spaced apart from the first electrode, the first and second electrodes being coupled to a power supply to electrostatically charge the first electrode.
    Type: Grant
    Filed: November 11, 2022
    Date of Patent: April 2, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Jaeyong Cho, Vijay D. Parkhe, Haitao Wang, Kartik Ramaswamy, Chunlei Zhang
  • Publication number: 20240094273
    Abstract: A wideband variable impedance load for high volume manufacturing qualification and diagnostic testing of a radio frequency power source, an impedance matching network and RF sensors for generating plasma in a semiconductor plasma chamber for semiconductor fabrication processes. The wideband variable impedance load may comprise a fixed value resistance operable at a plurality of frequencies and coupled with a variable impedance network capable of transforming the fixed value resistance into a wide range of complex impedances at the plurality of frequencies. Response times and match tuning element position repeatability may be verified. Automatic testing, verification and qualification of production and field installed radio frequency power sources for plasma generation are easily performed.
    Type: Application
    Filed: September 19, 2022
    Publication date: March 21, 2024
    Inventors: Yue GUO, Kartik RAMASWAMY, Jie YU, Yang YANG
  • Patent number: 11935724
    Abstract: The disclosure pertains to a capacitively coupled plasma source in which VHF power is applied through an impedance-matching coaxial resonator having a symmetrical power distribution.
    Type: Grant
    Filed: February 13, 2023
    Date of Patent: March 19, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Kartik Ramaswamy, Igor Markovsky, Zhigang Chen, James D. Carducci, Kenneth S. Collins, Shahid Rauf, Nipun Misra, Leonid Dorf, Zheng John Ye
  • Publication number: 20240087859
    Abstract: Methods and apparatus for forming plasma in a process chamber use an annular exciter formed of a first conductive material with a first end electrically connected to an RF power source that provides RF current and a second end connected to a ground and an annular applicator, physically separated from the annular exciter, formed of a second conductive material with at least one angular split with an angle forming an upper overlap portion and a lower overlap portion separated by a high K dielectric material which is configured to provide capacitance in conjunction with an inductance of the annular applicator to form a resonant circuit that is configured to resonate when the annular exciter flows RF current that inductively excites the annular applicator to a resonant frequency which forms azimuthal plasma from the annular applicator.
    Type: Application
    Filed: September 8, 2022
    Publication date: March 14, 2024
    Inventors: Kartik RAMASWAMY, Andrew NGUYEN, Yang YANG, Sathya GANTA, Fernando SILVEIRA, Yue GUO, Lu LIU
  • Publication number: 20240079212
    Abstract: Embodiments of the disclosure include a method of processing a substrate in a plasma processing system, comprising delivering an RF signal, by an RF generator, through an RF match to an electrode assembly disposed within the plasma processing system, wherein while delivering the RF signal the RF match is set to a first matching point, and delivering a voltage waveform, by a waveform generator, to the electrode assembly disposed within the plasma processing system while the RF signal is delivered to the electrode assembly.
    Type: Application
    Filed: September 7, 2022
    Publication date: March 7, 2024
    Inventors: Yue GUO, Kartik RAMASWAMY, Nicolas J. BRIGHT, Yang YANG, A N M Wasekul AZAD
  • Patent number: 11915850
    Abstract: A coil assembly for controlling a magnetic field in a plasma chamber is provided herein. In some embodiments, the coil assembly may include a mandrel including an annular body that includes at least one upper body coolant channel and at least one lower body coolant channel, and a plurality of cooling fins disposed circumferentially about an outer diameter of the body and radially outward from the outer diameter, an inner electromagnetic cosine-theta (cos ?) coil ring including a first set of inner coils wrapped around the plurality of cooling fins in the body and configured to generate a magnetic field in a first direction, an outer electromagnetic cosine-theta (cos ?) coil ring including a second set of outer coils wrapped around the plurality of cooling fins and configured to generate a magnetic field in a second direction orthogonal to the first direction.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: February 27, 2024
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Richard C. Fovell, Kartik Ramaswamy, Larry D. Elizaga
  • Patent number: 11894255
    Abstract: Embodiments of a process kit are provided herein. In some embodiments, a process kit for use in a substrate processing chamber includes: a ceramic ring having an upper surface and a lower surface, wherein the ceramic ring includes a chucking electrode disposed in the ceramic ring and a heating element disposed in the ceramic ring; and an edge ring disposed on the ceramic ring.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: February 6, 2024
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Jaeyong Cho, Kartik Ramaswamy, Daniel Sang Byun
  • Publication number: 20240030002
    Abstract: Embodiments of the disclosure provided herein include an apparatus and method for the plasma processing of a substrate in a processing chamber. More specifically, embodiments of this disclosure describe a biasing scheme that is configured to provide a pulsed-voltage (PV) waveform delivered from one or more pulsed-voltage (PV) generators to the one or more electrodes within the processing chamber. The plasma process(es) disclosed herein can be used to control the shape of an ion energy distribution function (IEDF) and the interaction of the plasma with a surface of a substrate during plasma processing.
    Type: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Inventors: Leonid DORF, Rajinder DHINDSA, James ROGERS, Daniel Sang BYUN, Evgeny KAMENETSKIY, Yue GUO, Kartik RAMASWAMY, Valentin N. TODOROW, Olivier LUERE, Linying CUI
  • Publication number: 20240011153
    Abstract: A processing chamber includes a chamber body defining an interior volume and including an access port. A cathode assembly is configured to generate a plasma within the interior volume. A chamber liner includes one or more inner notch structures to engage with one or more components of the chamber body. The chamber liner is configured to move between a loading position and an operation position. When the chamber liner is in the loading position, the interior volume is accessible by the access port. When the chamber liner is in the operation position, the chamber liner at least partially encloses the interior volume.
    Type: Application
    Filed: September 20, 2023
    Publication date: January 11, 2024
    Inventors: James D. Carducci, Kenneth S. Collins, Kartik Ramaswamy
  • Publication number: 20230411119
    Abstract: Embodiments disclosed herein include a dynamic load simulator. In an embodiment, the dynamic load simulator comprises an impedance load, a reverse match network, and a smart RF controller. In an embodiment, the smart RF controller comprises a dynamic load generator, and a reverse match controller.
    Type: Application
    Filed: June 17, 2022
    Publication date: December 21, 2023
    Inventors: Jie Yu, Yue Guo, Kartik Ramaswamy, Tao Zhang, Shahid Rauf, John Forster, Sidharth Bhatia, Rong Gang Zheng
  • Patent number: 11848176
    Abstract: Embodiments of the disclosure provided herein include an apparatus and method for the plasma processing of a substrate in a processing chamber. More specifically, embodiments of this disclosure describe a biasing scheme that is configured to provide a radio frequency (RF) generated RF waveform from an RF generator to one or more electrodes within a processing chamber and a pulsed-voltage (PV) waveform delivered from one or more pulsed-voltage (PV) generators to the one or more electrodes within the processing chamber. The plasma process(es) disclosed herein can be used to control the shape of an ion energy distribution function (IEDF) and the interaction of the plasma with a surface of a substrate during plasma processing.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: December 19, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Leonid Dorf, Rajinder Dhindsa, James Rogers, Daniel Sang Byun, Evgeny Kamenetskiy, Yue Guo, Kartik Ramaswamy, Valentin N. Todorow, Olivier Luere
  • Publication number: 20230402254
    Abstract: Embodiments provided herein generally include apparatus, e.g., plasma processing systems, and methods for the plasma processing of a substrate in a processing chamber. Some embodiments are directed to a waveform generator. The waveform generator generally includes a first voltage stage having: a first voltage source; a first switch; a ground reference; a transformer having a first transformer ratio, the first transformer comprising: a primary winding coupled to the first voltage source and the ground reference; and a secondary winding having a first end and a second end, wherein the first end is coupled to the ground reference, and the second end is configured to be coupled to a load through a common node; and a first diode coupled in parallel with the primary winding of the first transformer. The waveform generator generally also includes one or more additional voltage stages coupled to a load through the common node.
    Type: Application
    Filed: June 8, 2022
    Publication date: December 14, 2023
    Inventors: A N M Wasekul AZAD, Kartik RAMASWAMY, Yang YANG, Yue GUO, Fernando SILVEIRA
  • Patent number: 11823868
    Abstract: Embodiments provided herein generally include apparatus, e.g., plasma processing systems, and methods for the plasma processing of a substrate in a processing chamber. Some embodiments are directed to a radio-frequency (RF) generation system. The RF generation system generally includes an RF generator, and a vacuum interrupter configured to selectively decouple the RF generator from a bias electrode of a plasma chamber based on detection of a fault condition associated with operation of the plasma chamber.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: November 21, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Yue Guo, Yang Yang, Kartik Ramaswamy
  • Patent number: 11814724
    Abstract: Certain embodiments of the present disclosure relate to chamber liners, processing chambers that include chamber liners, and methods of using the same. In one embodiment, a method of operating a processing chamber includes causing a chamber liner within the processing chamber to move to a loading position to allow a substrate to be inserted through an access port of the processing chamber into an interior volume of the processing chamber. The method further includes causing the chamber liner to move to an operation position that blocks the access port after the substrate has been inserted into the interior volume. The method further includes generating a plasma using a cathode assembly.
    Type: Grant
    Filed: October 31, 2022
    Date of Patent: November 14, 2023
    Assignee: APPLIED MATERIALS, INC.
    Inventors: James D. Carducci, Kenneth S. Collins, Kartik Ramaswamy
  • Patent number: 11810760
    Abstract: Embodiments provided herein generally include apparatus, plasma processing systems and methods for generation of a waveform for plasma processing of a substrate in a processing chamber. Embodiments of the disclosure include an apparatus and method for generating a pulsed-voltage waveform that includes coupling a main voltage source to an electrode during a first phase of a process of generating a pulsed-voltage waveform, wherein the electrode is disposed within a processing chamber, coupling a ground node to the electrode during a second phase of the process of generating the pulsed-voltage waveform, coupling a first compensation voltage source to the electrode during a third phase of the process of generating the pulsed-voltage waveform, and coupling a second compensation voltage source to the electrode during a fourth phase of the process of generating the pulsed-voltage waveform.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: November 7, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Yang Yang, Yue Guo, Kartik Ramaswamy
  • Publication number: 20230343555
    Abstract: Methods and apparatus for processing a substrate are provided herein. For example, a matching network configured for use with a plasma processing chamber comprises an input configured to receive one or more radio frequency (RF) signals, an output configured to deliver the one or more RF signals to a processing chamber, a first sensor operably connected to the input and a second sensor operably connected to the output and configured to measure impedance during operation, at least one variable capacitor connected to the first sensor and the second sensor and a controller, based on a measured impedance, configured to tune the at least one variable capacitor of the matching network to a first target position based on weighted output impedance values measured at pulse states of a voltage waveform and to tune the at least one variable capacitor to a second target position based on weighted input impedance values measured at the pulse states of the voltage waveform.
    Type: Application
    Filed: April 22, 2022
    Publication date: October 26, 2023
    Inventors: Yue GUO, Katsumasa KAWASAKI, Kartik RAMASWAMY, Yang YANG, Nicolas John BRIGHT
  • Publication number: 20230335376
    Abstract: Apparatus provide plasma to a processing volume of a chamber. The Apparatus may comprise a plurality of plasma sources, each with at least a dielectric tube inlet which is at least partially surrounded by a conductive tube which is configured to be connected to RF power to generate plasma and a gas inlet positioned opposite the dielectric tube inlet for a process gas and a dielectric tube directly connected to each of the plurality of plasma sources where the dielectric tube is configured to at least partially contain plasma generated by the plurality of plasma sources and to release radicals generated in the plasma via holes in the dielectric tube.
    Type: Application
    Filed: April 19, 2022
    Publication date: October 19, 2023
    Inventors: Yang YANG, Fernando SILVEIRA, Kartik RAMASWAMY, Yue GUO, A N M Wasekul AZAD, Imad YOUSIF