Patents by Inventor Ranbir Singh

Ranbir Singh 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: 20220069071
    Abstract: An embodiment relates to a device comprising a first section and a second section. The first section comprises a first metal oxide semiconductor (MOS) interface comprising a first portion and a second portion. The first portion comprises a first contact with a horizontal surface of a semiconductor substrate and the second portion comprises a second contact with a trench sidewall of a trench region of the semiconductor substrate. The second section comprises one of a second metal oxide semiconductor (MOS) interface and a metal region. The second MOS interface comprises a third contact with the trench sidewall of the trench region. The metal region comprises a fourth contact with a first conductivity type drift layer. The first section and the second section are located contiguously within the device along a lateral direction.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 3, 2022
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20220037471
    Abstract: An embodiment relates to a n-type planar gate DMOSFET comprising a Silicon Carbide (SiC) substrate. The SiC substrate includes a N+ substrate, a N? drift layer, a P-well region and a first N+ source region within each P-well region. A second N+ source region is formed between the P-well region and a source metal via a silicide layer. During third quadrant operation of the DMOSFET, the second N+ source region starts depleting when a source terminal is positively biased with respect to a drain terminal. The second N+ source region impacts turn-on voltage of body diode regions of the DMOSFET by establishing short-circuitry between the P-well region and the source metal when the second N+ source region is completely depleted.
    Type: Application
    Filed: April 12, 2021
    Publication date: February 3, 2022
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20220037473
    Abstract: An embodiment relates to a n-type planar gate DMOSFET comprising a Silicon Carbide (SiC) substrate. The SiC substrate includes a N+ substrate, a N? drift layer, a P-well region and a first N+ source region within each P-well region. A second N+ source region is formed between the P-well region and a source metal via a silicide layer. During third quadrant operation of the DMOSFET, the second N+ source region starts depleting when a source terminal is positively biased with respect to a drain terminal. The second N+ source region impacts turn-on voltage of body diode regions of the DMOSFET by establishing short-circuitry between the P-well region and the source metal when the second N+ source region is completely depleted.
    Type: Application
    Filed: April 12, 2021
    Publication date: February 3, 2022
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20220037472
    Abstract: An embodiment relates to a n-type planar gate DMOSFET comprising a Silicon Carbide (SiC) substrate. The SiC substrate includes a N+ substrate, a N? drift layer, a P-well region and a first N+ source region within each P-well region. A second N+ source region is formed between the P-well region and a source metal via a silicide layer. During third quadrant operation of the DMOSFET, the second N+ source region starts depleting when a source terminal is positively biased with respect to a drain terminal. The second N+ source region impacts turn-on voltage of body diode regions of the DMOSFET by establishing short-circuitry between the P-well region and the source metal when the second N+ source region is completely depleted.
    Type: Application
    Filed: April 12, 2021
    Publication date: February 3, 2022
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20220037470
    Abstract: An embodiment relates to a n-type planar gate DMOSFET comprising a Silicon Carbide (SiC) substrate. The SiC substrate includes a N+ substrate, a N? drift layer, a P-well region and a first N+ source region within each P-well region. A second N+ source region is formed between the P-well region and a source metal via a silicide layer. During third quadrant operation of the DMOSFET, the second N+ source region starts depleting when a source terminal is positively biased with respect to a drain terminal. The second N+ source region impacts turn-on voltage of body diode regions of the DMOSFET by establishing short-circuitry between the P-well region and the source metal when the second N+ source region is completely depleted.
    Type: Application
    Filed: April 12, 2021
    Publication date: February 3, 2022
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Patent number: 11183566
    Abstract: A device is described herein. The device comprises a unit cell of a silicon carbide (SiC) substrate. The unit cell comprises: a trench in a well region having a second conduction type. The well region is in contact with a region having a first conduction type to form a p-n junction. A width of the trench is less than 1.0 micrometers (?m). A width of the unit cell is one of less than and equal to 5.0 micrometers (?m). The device comprises a source region comprising the first conduction type. The device further comprises a metal oxide semiconductor field effect transistor component. The device described herein comprises a reduced unit cell pitch and reduced channel resistance without any compromise in channel length. The device comprises an ILD opening greater than or equal to width of the trench.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: November 23, 2021
    Assignee: GeneSiC Semiconductor Inc.
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20210359106
    Abstract: An embodiment relates to a method comprising obtaining a SiC substrate comprising a N+ substrate and a N? drift layer; depositing a first hard mask layer on the SiC substrate and patterning the first hard mask layer; performing a p-type implant to form a p-well region; depositing a second hard mask layer on top of the first hard mask layer; performing an etch back of at least the second hard mask layer to form a sidewall spacer; implanting N type ions to form a N+ source region that is self-aligned; and forming a MOSFET.
    Type: Application
    Filed: June 9, 2021
    Publication date: November 18, 2021
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20210273044
    Abstract: An embodiment relates to a device comprising SiC, the device having a p-shield region that is outside a junction gate field-effect transistor region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform. Another embodiment relates to a device comprising SiC, the device having a p-shield region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform, wherein at least a portion of the p-shield region is located within the p-well region.
    Type: Application
    Filed: April 28, 2021
    Publication date: September 2, 2021
    Inventors: Siddarth SUNDARESAN, Ranbir SINGH, Jaehoon PARK
  • Publication number: 20210257447
    Abstract: An embodiment relates to a device comprising SiC, the device having a p-shield region that is outside a junction gate field-effect transistor region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform. Another embodiment relates to a device comprising SiC, the device having a p-shield region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform, wherein at least a portion of the p-shield region is located within the p-well region.
    Type: Application
    Filed: April 15, 2021
    Publication date: August 19, 2021
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Patent number: 11091288
    Abstract: The present invention is an apparatus and method for cutting individual label strips from a roll of label web utilizing a cutter assembly. A label cutter comprises a cutter assembly for continuously and independently controlling the rotational speeds of a rotating cutter shaft, a stationary shaft, and a label feed roller is provided. The length of the label strip is controlled by the distinct speed of rotation of a stationary knife, the stationary knife is rotatably coupled to the stationary shaft. At least one cutter blade is operatively associated to the rotating cutter shaft for cutting the label web. The stationary knife rotates with a to speed of rotation different from the speed of rotation of the cutter blade to produce longer or shorter label length strips. The frequency at which the cutter blade meets the stationary knife is inversely related to the length of the label strip that is produced during cut off.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: August 17, 2021
    Assignee: Elum Inc.
    Inventors: Ranbir Singh Claire, Vinay Leeladhar Piratla, Karmen Claire
  • Publication number: 20210242307
    Abstract: An embodiment relates to a semiconductor component, comprising a semiconductor body of a first conductivity type comprising a voltage blocking layer and islands of a second conductivity type on a contact surface and optionally a metal layer on the voltage blocking layer, and a first conductivity type layer comprising the first conductivity type not in contact with a gate dielectric layer or a source layer that is interspersed between the islands of the second conductivity type.
    Type: Application
    Filed: November 16, 2020
    Publication date: August 5, 2021
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Patent number: 11075277
    Abstract: An embodiment relates to a method comprising obtaining a SiC substrate comprising a N+ substrate and a N? drift layer; depositing a first hard mask layer on the SiC substrate and patterning the first hard mask layer; performing a p-type implant to form a p-well region; depositing a second hard mask layer on top of the first hard mask layer; performing an etch back of at least the second hard mask layer to form a sidewall spacer; implanting N type ions to form a N+ source region that is self-aligned; and forming a MOSFET.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: July 27, 2021
    Assignee: GeneSIC Semiconductor Inc.
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Patent number: 11049962
    Abstract: An embodiment relates to a device comprising a unit cell on a SiC substrate, the unit cell comprising a gate insulator film, a trench in the well region, and a first sinker region of a second conduction type, wherein the first sinker region has a depth that is equal to or greater than a depth of a well region; wherein the device has an on-resistance of less than 3 milliohm-cm2, a gate threshold voltage of greater than 2.8V, a breakdown voltage of greater than 1450V, and an electric field of less than 3.5 megavolt/cm in the gate insulator film at a drain voltage of less than or equal to 1200 V.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: June 29, 2021
    Assignee: GeneSiC Semiconductor Inc.
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Patent number: 11031461
    Abstract: An embodiment relates to a device comprising SiC, the device having a p-shield region that is outside a junction gate field-effect transistor region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform. Another embodiment relates to a device comprising SiC, the device having a p-shield region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform, wherein at least a portion of the p-shield region is located within the p-well region.
    Type: Grant
    Filed: August 25, 2019
    Date of Patent: June 8, 2021
    Assignee: GeneSiC Semiconductor Inc.
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Patent number: 11004940
    Abstract: An embodiment relates to a n-type planar gate DMOSFET comprising a Silicon Carbide (SiC) substrate. The SiC substrate includes a N+ substrate, a N? drift layer, a P-well region and a first N+ source region within each P-well region. A second N+ source region is formed between the P-well region and a source metal via a silicide layer. During third quadrant operation of the DMOSFET, the second N+ source region starts depleting when a source terminal is positively biased with respect to a drain terminal. The second N+ source region impacts turn-on voltage of body diode regions of the DMOSFET by establishing short-circuitry between the P-well region and the source metal when the second N+ source region is completely depleted.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: May 11, 2021
    Assignee: GeneSiC Semiconductor Inc.
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20210134998
    Abstract: An embodiment relates to a device comprising a unit cell on a SiC substrate, the unit cell comprising a gate insulator film, a trench in the well region, and a first sinker region of a second conduction type, wherein the first sinker region has a depth that is equal to or greater than a depth of a well region; wherein the device has an on-resistance of less than 3 milliohm-cm2, a gate threshold voltage of greater than 2.8V, a breakdown voltage of greater than 1450V, and an electric field of less than 3.5 megavolt/cm in the gate insulator film at a drain voltage of less than or equal to 1200 V.
    Type: Application
    Filed: January 14, 2020
    Publication date: May 6, 2021
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20210134996
    Abstract: An embodiment relates to a device comprising a unit cell on a SiC substrate, the unit cell comprising a gate insulator film, a trench in the well region, and a first sinker region of a second conduction type, wherein the first sinker region has a depth that is equal to or greater than a depth of a well region; wherein the device has an on-resistance of less than 3 milliohm-cm2, a gate threshold voltage of greater than 2.8V, a breakdown voltage of greater than 1450V, and an electric field of less than 3.5 megavolt/cm in the gate insulator film at a drain voltage of less than or equal to 1200 V.
    Type: Application
    Filed: October 31, 2019
    Publication date: May 6, 2021
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park
  • Publication number: 20210057519
    Abstract: An embodiment relates to a device comprising SiC, the device having a p-shield region that is outside a junction gate field-effect transistor region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform. Another embodiment relates to a device comprising SiC, the device having a p-shield region, wherein a doping concentration in a p-well region within a MOSFET channel is non-uniform, wherein at least a portion of the p-shield region is located within the p-well region.
    Type: Application
    Filed: August 25, 2019
    Publication date: February 25, 2021
    Inventors: Siddarth SUNDARESAN, Ranbir SINGH, Jaehoon PARK
  • Patent number: 10916632
    Abstract: An embodiment relates to a device having a SiC substrate, a well region, a source region, and a first sinker region, wherein the first sinker region has a depth that is equal to or greater than a depth of the well region, the source region is within the well region, the first sinker region is within the source region, and the first sinker region is located between a source interconnect metallization region and the SiC substrate. Another embodiment relates to a device having a SiC substrate, a drift layer on the SiC substrate, a well region on the drift layer, a source region within the well region, and a plug within the well region.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: February 9, 2021
    Assignee: GENESIC SEMICONDUCTOR INC.
    Inventors: Siddarth Sundaresan, Ranbir Singh, Stoyan Jeliazkov
  • Publication number: 20200388695
    Abstract: An embodiment relates to a method comprising obtaining a SiC substrate comprising a N+ substrate and a N? drift layer; depositing a first hard mask layer on the SiC substrate and patterning the first hard mask layer; performing a p-type implant to form a p-well region; depositing a second hard mask layer on top of the first hard mask layer; performing an etch back of at least the second hard mask layer to form a sidewall spacer; implanting N type ions to form a N+ source region that is self-aligned; and forming a MOSFET.
    Type: Application
    Filed: June 4, 2019
    Publication date: December 10, 2020
    Inventors: Siddarth Sundaresan, Ranbir Singh, Jaehoon Park