Patents by Inventor Haowen Bu

Haowen Bu 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: 20240349510
    Abstract: A method forms an integrated circuit, by forming a first conductive member affixed relative to a semiconductor substrate and a second conductive member affixed relative to the semiconductor substrate. The method also forms a ferroelectric member between the first and second conductive members. The ferroelectric member has a first portion including a first atomic ratio of lead (Pb) relative to other materials in the first portion and a second portion including a second atomic ratio of lead relative to other materials in the second portion, the second atomic ratio differing from the first atomic ratio.
    Type: Application
    Filed: September 30, 2023
    Publication date: October 17, 2024
    Inventors: Haowen Bu, Roger C. McDermott, Matthew Richards
  • Publication number: 20240006230
    Abstract: A semiconductor device includes a trench extending into a semiconductor layer. A liner layer is on a sidewall of the semiconductor layer within the trench. The liner layer extends from the sidewall to a top surface of the semiconductor layer. An isolation structure is within the trench. The isolation structure is between a first region of the semiconductor layer and a second region of the semiconductor layer. The semiconductor layer includes a third region that couples the first region to the second region of the semiconductor layer. The third region of the semiconductor layer is substantially free of phosphorus contamination.
    Type: Application
    Filed: June 30, 2022
    Publication date: January 4, 2024
    Inventors: Mahalingam NANDAKUMAR, Douglas Harvey NEWMAN, Byron Joseph PALLA, Haowen BU
  • Patent number: 11710764
    Abstract: An integrated circuit (IC) including a semiconductor surface layer of a substrate including functional circuitry having circuit elements formed in the semiconductor surface layer configured together with a Metal-Insulator-Metal capacitor (MIM) capacitor on the semiconductor surface layer for realizing at least one circuit function. The MIM capacitor includes a multilevel bottom capacitor plate having an upper top surface, a lower top surface, and sidewall surfaces that connect the upper and lower top surfaces (e.g., a bottom plate layer on a three-dimensional (3D) layer or the bottom capacitor plate being a 3D bottom capacitor plate). At least one capacitor dielectric layer is on the bottom capacitor plate. A top capacitor plate is on the capacitor dielectric layer, and there are contacts through a pre-metal dielectric layer to contact the top capacitor plate and the bottom capacitor plate.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: July 25, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Poornika Fernandes, Sagnik Dey, Luigi Colombo, Haowen Bu, Scott Robert Summerfelt, Mark Robert Visokay, John Paul Campbell
  • Patent number: 11670671
    Abstract: In a described example, an integrated circuit includes a capacitor first plate; a dielectric stack over the capacitor first plate comprising silicon nitride and silicon dioxide with a capacitance quadratic voltage coefficient less than 0.5 ppm/V2; and a capacitor second plate over the dielectric stack.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: June 6, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Patent number: 11569342
    Abstract: In a described example, a method for forming a capacitor includes: forming a capacitor first plate over a non-conductive substrate; flowing ammonia and nitrogen gas into a plasma enhanced chemical vapor deposition (PECVD) chamber containing the non-conductive substrate; stabilizing a pressure and a temperature in the PECVD chamber; turning on radio frequency high frequency (RF-HF) power to the PECVD chamber; pretreating the capacitor first plate for at least 60 seconds; depositing a capacitor dielectric on the capacitor first plate; and depositing a capacitor second plate on the capacitor dielectric.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: January 31, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Publication number: 20220375856
    Abstract: A method and an electronic device that includes an isolation structure having a dielectric material on or in a semiconductor surface layer, and a passive circuit component having a metal silicide structure on a side of the isolation structure, there the metal silicide structure includes a metal silicide portion and a dielectric portion, the dielectric portion of the metal silicide structure including one of silicon nitride, silicon oxide, silicon carbide, silicon carbon nitride, and silicon oxynitride. The method includes forming a dielectric material of the isolation structure on or in the semiconductor surface layer, forming a silicon-rich dielectric layer on a side of the isolation structure, and siliciding the silicon-rich dielectric layer to form the metal silicide structure on the side of the isolation structure.
    Type: Application
    Filed: September 30, 2021
    Publication date: November 24, 2022
    Applicant: Texas Instruments Incorporated
    Inventors: Mahalingam Nandakumar, Yuguo Wang, Haowen Bu
  • Publication number: 20210202688
    Abstract: In a described example, an integrated circuit includes a capacitor first plate; a dielectric stack over the capacitor first plate comprising silicon nitride and silicon dioxide with a capacitance quadratic voltage coefficient less than 0.5 ppm/V2; and a capacitor second plate over the dielectric stack.
    Type: Application
    Filed: February 22, 2021
    Publication date: July 1, 2021
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Patent number: 10964778
    Abstract: In a described example, an integrated circuit includes a capacitor first plate; a dielectric stack over the capacitor first plate comprising silicon nitride and silicon dioxide with a capacitance quadratic voltage coefficient less than 0.5 ppm/V2; and a capacitor second plate over the dielectric stack.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: March 30, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Publication number: 20200219969
    Abstract: In a described example, a method for forming a capacitor includes: forming a capacitor first plate over a non-conductive substrate; flowing ammonia and nitrogen gas into a plasma enhanced chemical vapor deposition (PECVD) chamber containing the non-conductive substrate; stabilizing a pressure and a temperature in the PECVD chamber; turning on radio frequency high frequency (RF-HF) power to the PECVD chamber; pretreating the capacitor first plate for at least 60 seconds; depositing a capacitor dielectric on the capacitor first plate; and depositing a capacitor second plate on the capacitor dielectric.
    Type: Application
    Filed: March 16, 2020
    Publication date: July 9, 2020
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Patent number: 10644098
    Abstract: In a described example, a method for forming a capacitor includes: forming a capacitor first plate over a non-conductive substrate; flowing ammonia and nitrogen gas into a plasma enhanced chemical vapor deposition (PECVD) chamber containing the non-conductive substrate; stabilizing a pressure and a temperature in the PECVD chamber; turning on radio frequency high frequency (RF-HF) power to the PECVD chamber; pretreating the capacitor first plate for at least 60 seconds; depositing a capacitor dielectric on the capacitor first plate; and depositing a capacitor second plate on the capacitor dielectric.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: May 5, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Publication number: 20200006471
    Abstract: An integrated circuit (IC) including a semiconductor surface layer of a substrate including functional circuitry having circuit elements formed in the semiconductor surface layer configured together with a Metal-Insulator-Metal capacitor (MIM) capacitor on the semiconductor surface layer for realizing at least one circuit function. The MIM capacitor includes a multilevel bottom capacitor plate having an upper top surface, a lower top surface, and sidewall surfaces that connect the upper and lower top surfaces (e.g., a bottom plate layer on a three-dimensional (3D) layer or the bottom capacitor plate being a 3D bottom capacitor plate). At least one capacitor dielectric layer is on the bottom capacitor plate. A top capacitor plate is on the capacitor dielectric layer, and there are contacts through a pre-metal dielectric layer to contact the top capacitor plate and the bottom capacitor plate.
    Type: Application
    Filed: June 27, 2018
    Publication date: January 2, 2020
    Inventors: POORNIKA FERNANDES, SAGNIK DEY, LUIGI COLOMBO, HAOWEN BU, SCOTT ROBERT SUMMERFELT, MARK ROBERT VISOKAY, JOHN PAUL CAMPBELL
  • Publication number: 20190259826
    Abstract: In a described example, an integrated circuit includes a capacitor first plate; a dielectric stack over the capacitor first plate comprising silicon nitride and silicon dioxide with a capacitance quadratic voltage coefficient less than 0.5 ppm/V2; and a capacitor second plate over the dielectric stack.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 22, 2019
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Publication number: 20190259827
    Abstract: In a described example, a method for forming a capacitor includes: forming a capacitor first plate over a non-conductive substrate; flowing ammonia and nitrogen gas into a plasma enhanced chemical vapor deposition (PECVD) chamber containing the non-conductive substrate; stabilizing a pressure and a temperature in the PECVD chamber; turning on radio frequency high frequency (RF-HF) power to the PECVD chamber; pretreating the capacitor first plate for at least 60 seconds; depositing a capacitor dielectric on the capacitor first plate; and depositing a capacitor second plate on the capacitor dielectric.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 22, 2019
    Inventors: Poornika Fernandes, Luigi Colombo, Haowen Bu
  • Patent number: 10157915
    Abstract: A microelectronic device includes a capacitor having a lower plate of interconnect metal, a capacitor dielectric layer with a lower silicon dioxide layer, a silicon oxy-nitride layer, and an upper silicon dioxide layer, and an upper plate over the upper silicon dioxide layer. The silicon oxy-nitride layer has an average index of refraction of 1.60 to 1.75 at a wavelength of 248 nanometers. To form the microelectronic device, the lower silicon dioxide layer, the silicon oxy-nitride layer, and the upper silicon dioxide layer are formed in sequence over an interconnect metal layer. An upper plate layer is patterned to form the upper plate, leaving the lower silicon dioxide layer and at least half of the silicon oxy-nitride layer over the interconnect metal layer. An interconnect mask is formed of photoresist over the upper plate and the silicon oxy-nitride layer, using the silicon oxy-nitride layer as an anti-reflection layer.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: December 18, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Bhaskar Srinivasan, Shih Chang Chang, Poornika Gayathri Fernandes, Haowen Bu, Guru Mathur
  • Patent number: 10068771
    Abstract: Oxide growth of a gate dielectric layer that occurs between processes used in the fabrication of a gate dielectric structure can be reduced. The reduction in oxide growth can be achieved by maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth of the gate dielectric layer between at least two sequential process steps used in the fabrication the gate dielectric structure. Maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth also improves the uniformity of nitrogen implanted in the gate dielectric.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: September 4, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Malcolm J. Bevan, Haowen Bu, Hiroaki Niimi, Husam N. Alshareef
  • Publication number: 20180130662
    Abstract: Oxide growth of a gate dielectric layer that occurs between processes used in the fabrication of a gate dielectric structure can be reduced. The reduction in oxide growth can be achieved by maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth of the gate dielectric layer between at least two sequential process steps used in the fabrication the gate dielectric structure. Maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth also improves the uniformity of nitrogen implanted in the gate dielectric.
    Type: Application
    Filed: January 9, 2018
    Publication date: May 10, 2018
    Inventors: Malcolm J. Bevan, Haowen Bu, Hiroaki Niimi, Husam N. Alshareef
  • Patent number: 9892927
    Abstract: Oxide growth of a gate dielectric layer that occurs between processes used in the fabrication of a gate dielectric structure can be reduced. The reduction in oxide growth can be achieved by maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth of the gate dielectric layer between at least two sequential process steps used in the fabrication the gate dielectric structure. Maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth also improves the uniformity of nitrogen implanted in the gate dielectric.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: February 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Malcolm J. Bevan, Haowen Bu, Hiroaki Niimi, Husam N. Alshareef
  • Patent number: 9779946
    Abstract: Oxide growth of a gate dielectric layer that occurs between processes used in the fabrication of a gate dielectric structure can be reduced. The reduction in oxide growth can be achieved by maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth of the gate dielectric layer between at least two sequential process steps used in the fabrication the gate dielectric structure. Maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth also improves the uniformity of nitrogen implanted in the gate dielectric.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: October 3, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Malcolm J. Bevan, Haowen Bu, Hiroaki Niimi, Husam N. Alshareef
  • Publication number: 20170170022
    Abstract: Oxide growth of a gate dielectric layer that occurs between processes used in the fabrication of a gate dielectric structure can be reduced. The reduction in oxide growth can be achieved by maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth of the gate dielectric layer between at least two sequential process steps used in the fabrication the gate dielectric structure. Maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth also improves the uniformity of nitrogen implanted in the gate dielectric.
    Type: Application
    Filed: February 27, 2017
    Publication date: June 15, 2017
    Inventors: Malcolm J. Bevan, Haowen Bu, Hiroaki Niimi, Husam N. Alshareef
  • Publication number: 20170133228
    Abstract: Oxide growth of a gate dielectric layer that occurs between processes used in the fabrication of a gate dielectric structure can be reduced. The reduction in oxide growth can be achieved by maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth of the gate dielectric layer between at least two sequential process steps used in the fabrication the gate dielectric structure. Maintaining the gate dielectric layer in an ambient effective to mitigate oxide growth also improves the uniformity of nitrogen implanted in the gate dielectric.
    Type: Application
    Filed: January 12, 2017
    Publication date: May 11, 2017
    Inventors: Malcolm J. Bevan, Haowen Bu, Hiroaki Niimi, Husam N. Alshareef