Patents by Inventor Kiran Shrestha

Kiran Shrestha 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: 20240096711
    Abstract: A method for forming a semiconductor device structure is disclosure. The method may include, depositing an NMOS gate dielectric and a PMOS gate dielectric over a semiconductor substrate, depositing a first work function metal over the NMOS gate dielectric and over the PMOS gate dielectric, removing the first work function metal over the PMOS gate dielectric, and depositing a second work function metal over the NMOS gate dielectric and over the PMOS gate dielectric. Semiconductor device structures including desired metal gate electrodes deposited by the methods of the disclosure are also disclosed.
    Type: Application
    Filed: November 29, 2023
    Publication date: March 21, 2024
    Inventors: Qi Xie, Chiyu Zhu, Kiran Shrestha, Pauline Calka, Oreste Madia, Jan Willem Maes, Michael Eugene Givens
  • Patent number: 11908736
    Abstract: Methods for depositing a molybdenum metal film over a dielectric surface of a substrate by a cyclical deposition process are disclosed. The methods may include: providing a substrate comprising a dielectric surface into a reaction chamber; depositing a nucleation film directly on the dielectric surface; and depositing a molybdenum metal film directly on the nucleation film, wherein depositing the molybdenum metal film includes: contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor; and contacting the substrate with a second vapor phase reactant comprising a reducing agent precursor. Semiconductor device structures including a molybdenum metal film disposed over a surface of a dielectric material with an intermediate nucleation film are also disclosed.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: February 20, 2024
    Assignee: ASM IP Holding B.V.
    Inventors: Bhushan Zope, Kiran Shrestha, Shankar Swaminathan, Chiyu Zhu, Henri Jussila, Qi Xie
  • Publication number: 20230352556
    Abstract: Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
    Type: Application
    Filed: July 3, 2023
    Publication date: November 2, 2023
    Inventors: Chiyu Zhu, Kiran Shrestha, Petri Raisanen, Michael Eugene Givens
  • Patent number: 11695054
    Abstract: Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
    Type: Grant
    Filed: August 25, 2021
    Date of Patent: July 4, 2023
    Assignee: ASM IP Holding B.V.
    Inventors: Chiyu Zhu, Kiran Shrestha, Petri Raisanen, Michael Eugene Givens
  • Patent number: 11581220
    Abstract: Methods for depositing a molybdenum metal film over a dielectric surface of a substrate by a cyclical deposition process are disclosed. The methods may include: providing a substrate comprising a dielectric surface into a reaction chamber; depositing a nucleation film directly on the dielectric surface; and depositing a molybdenum metal film directly on the nucleation film, wherein depositing the molybdenum metal film includes: contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor; and contacting the substrate with a second vapor phase reactant comprising a reducing agent precursor. Semiconductor device structures including a molybdenum metal film disposed over a surface of a dielectric material with an intermediate nucleation film are also disclosed.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: February 14, 2023
    Assignee: ASM IP Holding B.V.
    Inventors: Bhushan Zope, Kiran Shrestha, Shankar Swaminathan, Chiyu Zhu, Henri Tuomas Antero Jussila, Qi Xie
  • Patent number: 11475265
    Abstract: An NFC QR code label according to the present invention comprises: a rectenna for receiving a radio frequency signal from a terminal device and converting the signal into DC power; a ring oscillator activated by receiving the DC power supplied from the rectenna, and producing an oscillation signal having a predetermined frequency; and a light-emitting QR code flickering in response to the oscillation signal. The light-emitting QR code includes a QR code pattern formed by means of gravure printing using a nonconductor ink.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: October 18, 2022
    Assignee: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Gyou Jin Cho, Jun Feng Sun, Hye Jin Park, Kiran Shrestha, Gyan Rajkoirala, You Shin Kim, Pravesh Yadav, Sajjan Parajuli, Welsey Prince Vanaraj, Amol Marotrao Kale, Jinhwa Park, Sunggeun Lee
  • Publication number: 20220216105
    Abstract: Methods for depositing a molybdenum metal film over a dielectric surface of a substrate by a cyclical deposition process are disclosed. The methods may include: providing a substrate comprising a dielectric surface into a reaction chamber; depositing a nucleation film directly on the dielectric surface; and depositing a molybdenum metal film directly on the nucleation film, wherein depositing the molybdenum metal film includes: contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor; and contacting the substrate with a second vapor phase reactant comprising a reducing agent precursor. Semiconductor device structures including a molybdenum metal film disposed over a surface of a dielectric material with an intermediate nucleation film are also disclosed.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 7, 2022
    Inventors: Bhushan Zope, Kiran Shrestha, Shankar Swaminathan, Chiyu Zhu, Henri Jussila, Qi Xie
  • Patent number: 11295980
    Abstract: Methods for depositing a molybdenum metal film over a dielectric surface of a substrate by a cyclical deposition process are disclosed. The methods may include: providing a substrate comprising a dielectric surface into a reaction chamber; depositing a nucleation film directly on the dielectric surface; and depositing a molybdenum metal film directly on the nucleation film, wherein depositing the molybdenum metal film includes: contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor; and contacting the substrate with a second vapor phase reactant comprising a reducing agent precursor. Semiconductor device structures including a molybdenum metal film disposed over a surface of a dielectric material with an intermediate nucleation film are also disclosed.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: April 5, 2022
    Assignee: ASM IP Holding B.V.
    Inventors: Bhushan Zope, Kiran Shrestha, Shankar Swaminathan, Chiyu Zhu, Henri Tuomas Antero Jussila, Qi Xie
  • Publication number: 20220067473
    Abstract: An NFC QR code label according to the present invention comprises: a rectenna for receiving a radio frequency signal from a terminal device and converting the signal into DC power; a ring oscillator activated by receiving the DC power supplied from the rectenna, and producing an oscillation signal having a predetermined frequency; and a light-em QR code flickering in response to the oscillation signal. The light-emitting QR code includes a QR code pattern formed by means of gravure printing using a nonconductor ink.
    Type: Application
    Filed: December 19, 2018
    Publication date: March 3, 2022
    Inventors: Gyou Jin CHO, Jun Feng SUN, Hye Jin PARK, Kiran SHRESTHA, Gyan RAJKOIRALA, You Shin KIM, Pravesh YADAV, Sajjan PARAJULI, Welsey Prince VANARAJ, Amol Marotrao KALE, Jinhwa PARK, Sunggeun LEE
  • Publication number: 20210391440
    Abstract: Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
    Type: Application
    Filed: August 25, 2021
    Publication date: December 16, 2021
    Inventors: Chiyu Zhu, Kiran Shrestha, Petri Raisanen, Michael Eugene Givens
  • Patent number: 11164955
    Abstract: Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: November 2, 2021
    Assignee: ASM IP Holding B.V.
    Inventors: Chiyu Zhu, Kiran Shrestha, Petri Raisanen, Michael Eugene Givens
  • Publication number: 20210313182
    Abstract: There is provided a method of forming a layer, comprising depositing a seed layer on the substrate and depositing a bulk layer on the seed layer. Depositing the seed layer comprises supplying a first precursor comprising metal and halogen atoms to the substrate; and supplying a first reactant to the substrate. Depositing the bulk layer comprises supplying a second precursor comprising metal and halogen atoms to the seed layer and supplying a second reactant to the seed layer.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Inventors: Chiyu Zhu, Kiran Shrestha, Qi Xie
  • Patent number: 11056344
    Abstract: There is provided a method of forming a layer, comprising depositing a seed layer on the substrate and depositing a bulk layer on the seed layer. Depositing the seed layer comprises supplying a first precursor comprising metal and halogen atoms to the substrate; and supplying a first reactant to the substrate. Depositing the bulk layer comprises supplying a second precursor comprising metal and halogen atoms to the seed layer and supplying a second reactant to the seed layer.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: July 6, 2021
    Assignee: ASM IP Holding B.V.
    Inventors: Chiyu Zhu, Kiran Shrestha, Qi Xie
  • Publication number: 20210151352
    Abstract: Methods for depositing a molybdenum metal film over a dielectric surface of a substrate by a cyclical deposition process are disclosed. The methods may include: providing a substrate comprising a dielectric surface into a reaction chamber; depositing a nucleation film directly on the dielectric surface; and depositing a molybdenum metal film directly on the nucleation film, wherein depositing the molybdenum metal film includes: contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor; and contacting the substrate with a second vapor phase reactant comprising a reducing agent precursor. Semiconductor device structures including a molybdenum metal film disposed over a surface of a dielectric material with an intermediate nucleation film are also disclosed.
    Type: Application
    Filed: January 18, 2021
    Publication date: May 20, 2021
    Inventors: Bhushan Zope, Kiran Shrestha, Shankar Swaminathan, Chiyu Zhu, Henri Tuomas Antero Jussila, Qi Xie
  • Patent number: 10851456
    Abstract: A method for depositing a metal film onto a substrate is disclosed. In particular, the method comprises pulsing a metal halide precursor onto the substrate and pulsing a decaborane precursor onto the substrate. A reaction between the metal halide precursor and the decaborane precursor forms a metal film, specifically a metal boride.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: December 1, 2020
    Assignee: ASM IP Holding B.V.
    Inventors: Chiyu Zhu, Kiran Shrestha, Suvi Haukka
  • Publication number: 20200343358
    Abstract: Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
    Type: Application
    Filed: July 9, 2020
    Publication date: October 29, 2020
    Inventors: Chiyu Zhu, Kiran Shrestha, Petri Raisanen, Michael Eugene Givens
  • Patent number: 10734497
    Abstract: Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: August 4, 2020
    Assignee: ASM IP Holding B.V.
    Inventors: Chiyu Zhu, Kiran Shrestha, Petri Raisanen, Michael Eugene Givens
  • Publication number: 20200227325
    Abstract: A method for forming a semiconductor device structure is disclosure. The method may include, depositing an NMOS gate dielectric and a PMOS gate dielectric over a semiconductor substrate, depositing a first work function metal over the NMOS gate dielectric and over the PMOS gate dielectric, removing the first work function metal over the PMOS gate dielectric, and depositing a second work function metal over the NMOS gate dielectric and over the PMOS gate dielectric. Semiconductor device structures including desired metal gate electrodes deposited by the methods of the disclosure are also disclosed.
    Type: Application
    Filed: March 30, 2020
    Publication date: July 16, 2020
    Inventors: Qi Xie, Chiyu Zhu, Kiran Shrestha, Pauline Calka, Oreste Madia, Jan Willem Maes, Michael Eugene Givens
  • Patent number: 10607895
    Abstract: A method for forming a semiconductor device structure is disclosure. The method may include, depositing an NMOS gate dielectric and a PMOS gate dielectric over a semiconductor substrate, depositing a first work function metal over the NMOS gate dielectric and over the PMOS gate dielectric, removing the first work function metal over the PMOS gate dielectric, and depositing a second work function metal over the NMOS gate dielectric and over the PMOS gate dielectric. Semiconductor device structures including desired metal gate electrodes deposited by the methods of the disclosure are also disclosed.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: March 31, 2020
    Assignee: ASM IP Holdings B.V.
    Inventors: Qi Xie, Chiyu Zhu, Kiran Shrestha, Pauline Calka, Oreste Madia, Jan Willem Maes, Michael Eugene Givens
  • Publication number: 20190153593
    Abstract: A method for depositing a metal film onto a substrate is disclosed. In particular, the method comprises pulsing a metal halide precursor onto the substrate and pulsing a decaborane precursor onto the substrate. A reaction between the metal halide precursor and the decaborane precursor forms a metal film, specifically a metal boride.
    Type: Application
    Filed: January 25, 2019
    Publication date: May 23, 2019
    Inventors: Chiyu Zhu, Kiran Shrestha, Suvi Haukka