Patents by Inventor Karthik Balakrishnan

Karthik Balakrishnan 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).

  • Publication number: 20220044968
    Abstract: In an embodiment, a semiconductor processing tool for implementing hybrid laser and plasma dicing of a substrate is provided. The semiconductor processing tool comprises a transfer module, where the transfer module comprises a track robot for handling the substrate, and a loadlock attached to the transfer module. In an embodiment, the loadlock comprises a linear transfer system for handling the substrate. In an embodiment, the processing tool further comprises a processing chamber attached to the loadlock, wherein the linear transfer system of the loadlock is configured to insert and remove the substrate from the processing chamber.
    Type: Application
    Filed: August 10, 2020
    Publication date: February 10, 2022
    Inventors: Sriskantharajah Thirunavukarasu, Karthik Balakrishnan, Karthik Elumalai, Eng Sheng Peh
  • Publication number: 20220005936
    Abstract: A vertically stacked set of an n-type vertical transport field effect transistor (n-type VT FET) and a p-type vertical transport field effect transistor (p-type VT FET) is provided. The vertically stacked set of the n-type VT FET and the p-type VT FET includes a first bottom source/drain layer on a substrate, that has a first conductivity type, a lower channel pillar on the first bottom source/drain layer, and a first top source/drain on the lower channel pillar, that has the first conductivity type. The vertically stacked set of the n-type VT FET and the p-type VT FET further includes a second bottom source/drain on the first top source/drain, that has a second conductivity type different from the first conductivity type, an upper channel pillar on the second bottom source/drain, and a second top source/drain on the upper channel pillar, that has the second conductivity type.
    Type: Application
    Filed: September 17, 2021
    Publication date: January 6, 2022
    Inventors: Karthik Balakrishnan, Jeng-Bang Yau, Alexander Reznicek, Tak H. Ning
  • Publication number: 20210398854
    Abstract: An embodiment disclosed herein includes a method of dicing a wafer comprising a plurality of integrated circuits. In an embodiment, the method comprises forming a mask above the semiconductor wafer, and patterning the mask and the semiconductor wafer with a first laser process. The method may further comprise patterning the mask and the semiconductor wafer with a second laser process, where the second laser process is different than the first laser process. In an embodiment, the method may further comprise etching the semiconductor wafer with a plasma etching process to singulate the integrated circuits.
    Type: Application
    Filed: June 22, 2020
    Publication date: December 23, 2021
    Inventors: Jungrae Park, Zavier Zai Yeong Tan, Karthik Balakrishnan, James S. Papanu, Wei-Sheng Lei
  • Publication number: 20210398853
    Abstract: Embodiments of the present disclosure include methods of determining scribing offsets in a hybrid laser scribing and plasma dicing process. In an embodiment, the method comprises forming a mask above a semiconductor wafer. In an embodiment, the semiconductor wafer comprises a plurality of dies separated from each other by streets. In an embodiment, the method further comprises patterning the mask and the semiconductor wafer with a laser scribing process. In an embodiment, the patterning provides openings in the streets. In an embodiment, the method further comprises removing the mask, and measuring scribing offsets of the openings relative to the streets.
    Type: Application
    Filed: June 22, 2020
    Publication date: December 23, 2021
    Inventors: Karthik Balakrishnan, Jungrae Park, Zavier Zai Yeong Tan, Sai Abhinand, James S. Papanu
  • Patent number: 11189701
    Abstract: Vertical bipolar junction transistors (VBJTs), each with one or more resistors connected in a circuit in different circuit configurations, are disclosed. The VBJT has an emitter substructure that includes an emitter layer, a collector, an intrinsic base, one or more doped epitaxy regions, and one or more resistors. The intrinsic base, the doped epitaxy region(s), and the resistor(s) are stacked upon one another in a channel between the emitter layer and the collector. Various circuit configurations and structures are described including a common-collector circuit, a common-emitter circuit, and an emitter-degenerate circuit. Methods of making these configuration/structures are disclosed.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: November 30, 2021
    Assignee: International Business Machines Corporation
    Inventors: Alexander Reznicek, Bahman Hekmatshoartabari, Karthik Balakrishnan
  • Patent number: 11187672
    Abstract: A method for making a hydrophobic biosensing device includes forming alternating layers over a top and sides of a fin on a dielectric layer to form a stack of layers. The stack of layers are planarized to expose the top of the fin. The fin and every other layer are removed to form a cathode group of fins and an anode group of fins. A hydrophobic surface on the two groups of fins.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: November 30, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ali Afzali-Ardakani, Karthik Balakrishnan, Stephen W. Bedell, Pouya Hashemi, Bahman Hekmatshoartabari, Alexander Reznicek
  • Publication number: 20210366296
    Abstract: A platform for unmanned traffic management (UTM) may include a compute system and infrastructure that standardizes and controls aviation data transmitted between service providers, where each service is abstracted from the platform through a service wrapper that enforces the preset data standards. The service wrappers enforce restrictions on the performance and configuration of data from the service provider. The service wrappers are customized to respective services (such as tracking, terrain, or weather), but provide a standard point of interface, security, and trust between the platform and any services directed to provide a similar function. Upon the request of a user or service providers to obtain aviation data, the UTM platform selects a service providing that aviation data, and provides connection data to the user while protecting the security and integrity of the data.
    Type: Application
    Filed: June 29, 2019
    Publication date: November 25, 2021
    Applicant: A^3 BY AIRBUS LLC
    Inventors: Joseph Polastre, Karthik Balakrishnan
  • Publication number: 20210358310
    Abstract: Data associated with a flight, including a flight plan, a vehicle, and/or a pilot is processed via a risk assessment platform to obtain one of more numerical risk values, for example a ground risk value and an air risk value. Based on the processed data, a matrix of risk assessment decisions is generated containing risk related information (such as risk remediation information). Accordingly, based on a consistent set of risk relation information, a predictable and repeatable flight decision (such as a decision whether to fly, or an adjustment to a flight route) can be made. In some instances, the data to be processed is quantitative data collected from one or more third party systems, such as sensor data or geospatial data. The risk assessment platform includes toolkits or services to be used in the processing and transformation of this data to reach a risk assessment decision.
    Type: Application
    Filed: May 24, 2019
    Publication date: November 18, 2021
    Applicant: A^3 BY AIRBUS LLC
    Inventors: Peter Sachs, Richard Golding, Joseph Polastre, Karthik Balakrishnan, Ryan Rodriguez
  • Patent number: 11177372
    Abstract: A vertically stacked set of an n-type vertical transport field effect transistor (n-type VT FET) and a p-type vertical transport field effect transistor (p-type VT FET) is provided. The vertically stacked set of the n-type VT FET and the p-type VT FET includes a first bottom source/drain layer on a substrate, that has a first conductivity type, a lower channel pillar on the first bottom source/drain layer, and a first top source/drain on the lower channel pillar, that has the first conductivity type. The vertically stacked set of the n-type VT FET and the p-type VT FET further includes a second bottom source/drain on the first top source/drain, that has a second conductivity type different from the first conductivity type, an upper channel pillar on the second bottom source/drain, and a second top source/drain on the upper channel pillar, that has the second conductivity type.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: November 16, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Karthik Balakrishnan, Jeng-Bang Yau, Alexander Reznicek, Tak H. Ning
  • Patent number: 11164907
    Abstract: A method may include forming two vertical transport field effect transistors stacked one atop the other and separated by a resistive random access memory structure. The two vertical transport field effect transistors may include a source, a channel, and a drain, wherein a contact layer of the resistive random access memory structure functions as the drain of the two vertical transport field effect transistors. Forming the two vertical transport field effect transistors may further include forming a first source and a second source. The first source is a bottom source and the second source is a top source. The method may include forming a gate conductor layer surrounding the channel. The resistive random access memory structures may include faceted epitaxy defined by pointed tips. The pointed tips of the faceted epitaxy may extend vertically toward each other. The faceted epitaxy may be between the two vertical transport field effect transistors.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: November 2, 2021
    Assignee: International Business Machines Corporation
    Inventors: Karthik Balakrishnan, Bahman Hekmatshoartabari, Alexander Reznicek, Takashi Ando
  • Patent number: 11158756
    Abstract: A semiconductor radiation monitor (i.e., dosimeter) is provided that has an oxide charge storage region located on a first side of a semiconductor fin and a functional gate structure located on a second side of the semiconductor fin that is opposite the first side. Charges are created in the oxide charge storage region that is located on the first side of the semiconductor fin and detected on the second side of the semiconductor fin by the functional gate structure. Multiple semiconductor fins in parallel can form a dense and very sensitive semiconductor radiation monitor.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: October 26, 2021
    Assignee: International Business Machines Corporation
    Inventors: Alexander Reznicek, Bahman Hekmatshoartabari, Jeng-Bang Yau, Karthik Balakrishnan
  • Patent number: 11158729
    Abstract: A vertically stacked set of an n-type vertical transport field effect transistor (n-type VT FET) and a p-type vertical transport field effect transistor (p-type VT FET) is provided. The vertically stacked set of the n-type VT FET and the p-type VT FET includes a first bottom source/drain layer on a substrate, that has a first conductivity type, a lower channel pillar on the first bottom source/drain layer, and a first top source/drain on the lower channel pillar, that has the first conductivity type. The vertically stacked set of the n-type VT FET and the p-type VT FET further includes a second bottom source/drain on the first top source/drain, that has a second conductivity type different from the first conductivity type, an upper channel pillar on the second bottom source/drain, and a second top source/drain on the upper channel pillar, that has the second conductivity type.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: October 26, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Karthik Balakrishnan, Jeng-Bang Yau, Alexander Reznicek, Tak H. Ning
  • Publication number: 20210320205
    Abstract: A Vertical Junction Field Effect Transistor (VJFET) is disclosed with reduced noise and input capacitance and high input impedance. The VJFET has a substrate; a source disposed on the substrate; a drain; and a channel. The vertical channel has one or more channel sidewall surfaces. The channel sidewall surfaces have a total or aggregate channel sidewall surface area. A semiconductor gate grown on one or more of the channel sidewall surfaces has a thickness below 10 nanometers (nm), or between 3 nm and 10 nm, that reduces transistor noise. The interface surface area between the conductive (e.g. metal) external electrical gate contact and the contacted surface of the semiconductor gate is minimized to further reduce transistor noise.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 14, 2021
    Inventors: Bahman Hekmatshoartabari, Alexander Reznicek, Karthik Balakrishnan
  • Patent number: 11145816
    Abstract: A one-transistor-two-resistor (1T2R) resistive random access memory (ReRAM) structure, and a method for forming the same, includes forming a vertical field effect transistor (VFET) including an epitaxial region located above a channel region and below a dielectric cap. The epitaxial region includes two opposing protruding regions of triangular shape bounded by <111> planes that extend horizontally beyond the channel region. A ReRAM stack is conformally deposited on the VFET. The ReRAM stack includes an oxide layer located directly above the epitaxial region, a top electrode layer directly above the oxide layer and a metal fill above the top electrode layer. Each of the two opposing protruding regions of the epitaxial region acts as a bottom electrode for the ReRAM stack.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: October 12, 2021
    Assignee: International Business Machines Corporation
    Inventors: Alexander Reznicek, Bahman Hekmatshoartabari, Takashi Ando, Karthik Balakrishnan
  • Patent number: 11145668
    Abstract: Semiconductor device, memory arrays, and methods of forming a memory cell include or utilize one or more memory cells. The memory cell(s) include a first nanosheet transistor connected to a first terminal, a second nanosheet transistor located on top of the first nanosheet transistor and connected in parallel to the first nanosheet transistor and connected to a second terminal, where the first and second nanosheet transistors share a common floating gate and a common output terminal, and an access transistor connected in series to the common output terminal and a low voltage terminal, the access transistor configured to trigger hot-carrier injection to the common floating gate to change a voltage of the common floating gate.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: October 12, 2021
    Assignee: International Business Machines Corporation
    Inventors: Alexander Reznicek, Karthik Balakrishnan, Jeng-Bang Yau, Tak H. Ning
  • Publication number: 20210288187
    Abstract: A Junction Field Effect Transistor (JFET) has a source and a drain disposed on a substrate. The source and drain have an S/D doping with an S/D doping type. Two or more channels are electrically connected in parallel between the source and drain and can carry a current between the source and drain. Each of the channels has two or more channel surfaces. The channel has the same channel doping type as the S/D doping type. A first gate is in direct contact with one of the channel surfaces. One or more second gates is in direct contact with a respective second channel surface. The gates are doped with a gate doping that has a gate doping type opposite of the channel doping type. A p-n junction (junction gate) is formed where the gates and channel surfaces are in direct contact. The first and second gates are electrically connected so a voltage applied to the first and second gates creates at least two depletion regions in each of the channels.
    Type: Application
    Filed: March 12, 2020
    Publication date: September 16, 2021
    Inventors: Alexander Reznicek, Bahman Hekmatshoartabari, Karthik Balakrishnan
  • Publication number: 20210288109
    Abstract: A method may include forming two vertical transport field effect transistors stacked one atop the other and separated by a resistive random access memory structure. The two vertical transport field effect transistors may include a source, a channel, and a drain, wherein a contact layer of the resistive random access memory structure functions as the drain of the two vertical transport field effect transistors. Forming the two vertical transport field effect transistors may further include forming a first source and a second source. The first source is a bottom source and the second source is a top source. The method may include forming a gate conductor layer surrounding the channel. The resistive random access memory structures may include faceted epitaxy defined by pointed tips. The pointed tips of the faceted epitaxy may extend vertically toward each other. The faceted epitaxy may be between the two vertical transport field effect transistors.
    Type: Application
    Filed: March 11, 2020
    Publication date: September 16, 2021
    Inventors: Karthik Balakrishnan, Bahman Hekmatshoartabari, Alexander Reznicek, Takashi Ando
  • Publication number: 20210272857
    Abstract: A first vertical T-FET has a source heavily doped with a source concentration of a source-type dopant, a drain doped with a drain concentration of a drain-type dopant, and a channel between the source and drain. The source, channel, and drain are stacked vertically in a fin or pillar perpendicular to a substrate. A gate stack encompasses the channel sides and has a drain overlap amount overlapping the drain sides and a source overlap amount overlapping the source sides. External contacts electrically connect the gate and source and/or drain. The source-type dopant and the drain-type dopant are opposite dopant types. In some embodiments, a second vertical T-FET is stacked on the first vertical T-FET. Different VT-FET devices are made by changing the materials, doping types and levels, and connections to the sources, channels, and drains. Device characteristics are designed/changed by changing the amount of source and drain overlaps of the gate stack(s).
    Type: Application
    Filed: April 10, 2021
    Publication date: September 2, 2021
    Inventors: Karthik Balakrishnan, Bahman Hekmatshoartabari, Alexander Reznicek
  • Patent number: 11101374
    Abstract: One or more gated nanosheet diodes are disposed on a substrate and made from a nanosheet structure. A first (second) source/drain (S/D) is disposed on the substrate. The first (second) S/D has a first (second) S/D doping concentration with a first (second) S/D doping type. One or more p-n junctions form one or more respective diodes. There is a first side and a second side of each of the p-n junctions. The first (second) sides of the p-n junctions electrically and physically connect to the first (second) S/Ds and have the same type of doping, respectively. A gate stack, made of a gate dielectric layer and a gate metal, interfaces and surrounds each of the p-n junctions.
    Type: Grant
    Filed: June 13, 2020
    Date of Patent: August 24, 2021
    Assignee: International Business Machines Corporation
    Inventors: Alexander Reznicek, Bahman Hekmatshoartabari, Karthik Balakrishnan
  • Patent number: 11094819
    Abstract: A first vertical T-FET has a source heavily doped with a source concentration of a source-type dopant, a drain doped with a drain concentration of a drain-type dopant, and a channel between the source and drain. The source, channel, and drain are stacked vertically in a fin or pillar perpendicular to a substrate. A gate stack encompasses the channel sides and has a drain overlap amount overlapping the drain sides and a source overlap amount overlapping the source sides. External contacts electrically connect the gate and source and/or drain. The source-type dopant and the drain-type dopant are opposite dopant types. In some embodiments, a second vertical T-FET is stacked on the first vertical T-FET. Different VT-FET devices are made by changing the materials, doping types and levels, and connections to the sources, channels, and drains. Device characteristics are designed/changed by changing the amount of source and drain overlaps of the gate stack(s).
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: August 17, 2021
    Assignee: International Business Machines Corporation
    Inventors: Karthik Balakrishnan, Bahman Hekmatshoartabari, Alexander Reznicek