Patents by Inventor Bhaskar Srinivasan

Bhaskar Srinivasan 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: 20200328149
    Abstract: In some examples, a method comprises: obtaining a substrate having at a metal interconnect layer deposited over the substrate; forming a first dielectric layer on the metal interconnect layer; forming a second dielectric layer on the first dielectric layer; forming a capacitor metal layer on the second dielectric layer; patterning and etching the capacitor metal layer and the second dielectric layer to the first dielectric layer to leave a portion of the capacitor metal layer and the second dielectric layer on the first dielectric layer; forming an anti-reflective coating to cover the portion of the capacitor metal layer and the second dielectric layer, and to cover the metal interconnect layer; and patterning the metal interconnect layer to form a first metal layer and a second metal layer.
    Type: Application
    Filed: April 12, 2019
    Publication date: October 15, 2020
    Inventors: Poornika FERNANDES, Bhaskar SRINIVASAN, Scott William JESSEN, Guruvayurappan S. MATHUR
  • Publication number: 20200212167
    Abstract: A method of fabricating an integrated circuit (IC) includes providing a substrate having a semiconductor surface layer comprising an unpatterned resistive layer. Measurements are obtained of a characteristic of the unpatterned resistive layer at each of a plurality of locations over the substrate. The unpatterned resistive layer is modified, such as by targeted removal of layer material, in response to the measurements such that the measured characteristic is more uniform across the substrate. A resistor on the IC is defined from the unpatterned resistive layer after the modifying.
    Type: Application
    Filed: December 26, 2018
    Publication date: July 2, 2020
    Inventors: BHASKAR SRINIVASAN, BRIAN GOODLIN, DHISHAN KANDE
  • Patent number: 10680056
    Abstract: A method of fabricating an integrated circuit (IC) includes providing a substrate having a semiconductor surface layer comprising an unpatterned resistive layer. Measurements are obtained of a characteristic of the unpatterned resistive layer at each of a plurality of locations over the substrate. The unpatterned resistive layer is modified, such as by targeted removal of layer material, in response to the measurements such that the measured characteristic is more uniform across the substrate. A resistor on the IC is defined from the unpatterned resistive layer after the modifying.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: June 9, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bhaskar Srinivasan, Brian Goodlin, Dhishan Kande
  • Patent number: 10665663
    Abstract: An integrated circuit (IC) includes a semiconductor surface layer on a substrate including functional circuitry having circuit elements configured together with a metal-to-polysilicon capacitor on the semiconductor surface layer for realizing at least one circuit function. The metal-to-polysilicon capacitor includes a bottom plate including polysilicon, a capacitor dielectric including at least one capacitor dielectric layer on the bottom plate, a top plate on the capacitor dielectric, and contacts through a pre-metal dielectric layer that contact the top plate and contact the bottom plate. In lateral regions relative to the capacitor the capacitor dielectric layer has a thickness in a range between about 5% and about 50% of a thickness of the capacitor dielectric of the metal-to-polysilicon capacitor.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 26, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Poornika Fernandes, Bhaskar Srinivasan, Guruvayurappan Mathur, Abbas Ali, David Matthew Curran, Neil L. Gardner
  • Publication number: 20200161414
    Abstract: An integrated circuit (IC) includes a semiconductor surface layer on a substrate including functional circuitry having circuit elements configured together with a metal-to-polysilicon capacitor on the semiconductor surface layer for realizing at least one circuit function. The metal-to-polysilicon capacitor includes a bottom plate including polysilicon, a capacitor dielectric including at least one capacitor dielectric layer on the bottom plate, a top plate on the capacitor dielectric, and contacts through a pre-metal dielectric layer that contact the top plate and contact the bottom plate. In lateral regions relative to the capacitor the capacitor dielectric layer has a thickness in a range between about 5% and about 50% of a thickness of the capacitor dielectric of the metal-to-polysilicon capacitor.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 21, 2020
    Inventors: POORNIKA FERNANDES, BHASKAR SRINIVASAN, GURUVAYURAPPAN MATHUR, ABBAS ALI, DAVID MATTHEW CURRAN, NEIL L. GARDNER
  • Patent number: 10608075
    Abstract: An integrated circuit includes a capacitor located over a semiconductor substrate. The capacitor includes a first conductive layer having a first lateral perimeter, and a second conductive layer having a second smaller lateral perimeter. A first dielectric layer is located between the second conductive layer and the first conductive layer. The first dielectric layer has a thinner portion having the first lateral perimeter and a thicker portion having the second lateral perimeter. An interconnect line is located over the substrate, and includes a third conductive layer that is about coplanar with and has about a same thickness as the first conductive layer. A second dielectric layer is located over the third conductive layer. The second dielectric layer is about coplanar with and has about a same thickness as the thinner portion of the first dielectric layer.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: March 31, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
  • Publication number: 20190157379
    Abstract: An integrated circuit includes a capacitor located over a semiconductor substrate. The capacitor includes a first conductive layer having a first lateral perimeter, and a second conductive layer having a second smaller lateral perimeter. A first dielectric layer is located between the second conductive layer and the first conductive layer. The first dielectric layer has a thinner portion having the first lateral perimeter and a thicker portion having the second lateral perimeter. An interconnect line is located over the substrate, and includes a third conductive layer that is about coplanar with and has about a same thickness as the first conductive layer. A second dielectric layer is located over the third conductive layer. The second dielectric layer is about coplanar with and has about a same thickness as the thinner portion of the first dielectric layer.
    Type: Application
    Filed: January 4, 2019
    Publication date: May 23, 2019
    Inventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
  • Patent number: 10177215
    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 capacitor dielectric layer. The silicon oxy-nitride layer has an average index of refraction of 1.85 to 1.95 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. The upper plate is formed, leaving the lower silicon dioxide layer, the silicon oxy-nitride layer, and at least a portion of the upper silicon dioxide 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: January 8, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
  • 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
  • Publication number: 20180226418
    Abstract: In some examples, a system comprises a capacitor including a first plate, a second plate, and a ferroelectric material disposed between the first and the second plates and comprising a Bismuth Metal Oxide-Based Lead Titanate thin film. The capacitor further comprises a dielectric layer disposed on a transistor, wherein the capacitor is disposed on the dielectric layer.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 9, 2018
    Inventors: Carl Sebastian MORANDI, Susan TROLIER-McKINSTRY, Kezhakkedath Ramunni UDAYAKUMAR, John Anthony RODRIGUEZ, Bhaskar SRINIVASAN
  • Publication number: 20170221983
    Abstract: A method of fabricating an integrated circuit (IC) includes etching a trench in a semiconductor layer on a substrate having an aspect ratio (AR)?5 and a trench depth?10 ?m. A dielectric liner is formed along the walls of the trench. An in-situ doped polysilicon layer having a first thickness is deposited into the trench to form a dielectric lined partially filled trench. An un-doped polysilicon layer having a second thickness greater than the first thickness is deposited on the in-situ doped polysilicon layer to complete a filling of the trench to provide a polysilicon filled trench. The doped polysilicon filler after completion of fabricating the IC is essentially polysilicon void-free and has a 25° C. sheet resistance?60 ohms/sq. The method can include etching an opening at a bottom of the dielectric liner before depositing the polysilicon to provide ohmic contact to the semiconductor layer.
    Type: Application
    Filed: January 28, 2016
    Publication date: August 3, 2017
    Inventors: BHASKAR SRINIVASAN, BINGHUA HU, KHANH QUANG LE, SOPA CHEVACHAROENKUL
  • Patent number: 9691751
    Abstract: A method of fabricating an integrated circuit (IC) includes etching a trench in a semiconductor substrate having an aspect ratio (AR) ?5 and a trench depth ?10 ?m. A dielectric liner is formed along the walls of the trench to form a dielectric lined trench. In-situ doped polysilicon is deposited into the trench to form a dielectric lined polysilicon filled trench having a doped polysilicon filler therein. The doped polysilicon filler after completion of fabricating the IC is essentially polysilicon void-free and has a 25° C. sheet resistance ?100 ohms/sq. The method can include etching an opening at a bottom of the dielectric liner before depositing the polysilicon to provide ohmic contact to the semiconductor substrate.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: June 27, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bhaskar Srinivasan, Khanh Quang Le, Collin White, Sopa Chevacharoenkul, Ashley Norris, Bernard John Fischer
  • Patent number: 9666801
    Abstract: A method of forming a non-volatile resistive oxide memory cell includes forming a first conductive electrode of the memory cell as part of a substrate. Metal oxide-comprising material is formed over the first conductive electrode. Etch stop material is deposited over the metal oxide-comprising material. Conductive material is deposited over the etch stop material. A second conductive electrode of the memory cell which comprises the conductive material received is formed over the etch stop material. Such includes etching through the conductive material to stop relative to the etch stop material and forming the non-volatile resistive oxide memory cell to comprise the first and second conductive electrodes having both the metal oxide-comprising material and the etch stop material therebetween. Other implementations are contemplated.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: May 30, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Nishant Sinha, John Smythe, Bhaskar Srinivasan, Gurtej S. Sandhu, Joseph Neil Greeley, Kunal R. Parekh
  • Patent number: 9583336
    Abstract: A microelectronic device with a ferroelectric layer is formed using an MOCVD tool. A substrate is disposed on a susceptor heated to 600° C. to 650° C. A first carrier gas is flowed into a manifold to combine with a plurality of metal organic precursors. The first carrier gas, the metal organic precursors, and a second carrier gas, are flowed through a vaporizer into a chamber of the MOCVD tool, over the substrate. A ratio of a flow rate of the first carrier gas to a flow rate of the metal organic precursors is 250 sccm/milliliter/minute to 500 sccm/milliliter/minute. A ratio of a flow rate of the second carrier gas to a flow rate of the metal organic precursors is 700 sccm/milliliter/minute to 1500 sccm/milliliter/minute. An oxidizing gas is flowed into the chamber over the substrate. The metal organic precursors and the oxidizing gas react to form the ferroelectric layer.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: February 28, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bhaskar Srinivasan, Asad Mahmood Haider, Brian E. Goodlin, Haowen Bu, Roger Charles McDermott
  • Patent number: 9577186
    Abstract: A method of forming a non-volatile resistive oxide memory cell includes forming a first conductive electrode of the memory cell as part of a substrate. The first conductive electrode has an elevationally outermost surface and opposing laterally outermost edges at the elevationally outermost surface in one planar cross section. Multi-resistive state metal oxide-comprising material is formed over the first conductive electrode. Conductive material is deposited over the multi-resistive state metal oxide-comprising material. A second conductive electrode of the memory cell which comprises the conductive material is received over the multi-resistive state metal oxide-comprising material.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: February 21, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Bhaskar Srinivasan, Gurtej Sandhu, John Smythe
  • Publication number: 20160260899
    Abstract: A method of forming a non-volatile resistive oxide memory cell includes forming a first conductive electrode of the memory cell as part of a substrate. Metal oxide-comprising material is formed over the first conductive electrode. Etch stop material is deposited over the metal oxide-comprising material. Conductive material is deposited over the etch stop material. A second conductive electrode of the memory cell which comprises the conductive material received is formed over the etch stop material. Such includes etching through the conductive material to stop relative to the etch stop material and forming the non-volatile resistive oxide memory cell to comprise the first and second conductive electrodes having both the metal oxide-comprising material and the etch stop material therebetween. Other implementations are contemplated.
    Type: Application
    Filed: May 16, 2016
    Publication date: September 8, 2016
    Applicant: Micron Technology, Inc.
    Inventors: Nishant Sinha, John Smythe, Bhaskar Srinivasan, Gurtej S. Sandhu, Joseph Neil Greeley, Kunal R. Parekh
  • Patent number: 9406878
    Abstract: Some embodiments include methods of programming a memory cell. A plurality of charge carriers may be moved within the memory cell, with an average charge across the moving charge carriers having an absolute value greater than 2. Some embodiments include methods of forming and programming an ionic-transport-based memory cell. A stack is formed to have programmable material between first and second electrodes. The programmable material has mobile ions which are moved within the programmable material to transform the programmable material from one memory state to another. An average charge across the moving mobile ions has an absolute value greater than 2. Some embodiments include memory cells with programmable material between first and second electrodes. The programmable material includes an aluminum nitride first layer, and includes a second layer containing a mobile ion species in common with the first layer.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: August 2, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Roy E. Meade, Bhaskar Srinivasan, Gurtej S. Sandhu
  • Publication number: 20160172235
    Abstract: A method of fabricating an integrated circuit (IC) includes etching a trench in a semiconductor substrate having an aspect ratio (AR) ?5 and a trench depth ?10 ?m. A dielectric liner is formed along the walls of the trench to form a dielectric lined trench. In-situ doped polysilicon is deposited into the trench to form a dielectric lined polysilicon filled trench having a doped polysilicon filler therein. The doped polysilicon filler after completion of fabricating the IC is essentially polysilicon void-free and has a 25° C. sheet resistance ?100 ohms/sq. The method can include etching an opening at a bottom of the dielectric liner before depositing the polysilicon to provide ohmic contact to the semiconductor substrate.
    Type: Application
    Filed: December 15, 2014
    Publication date: June 16, 2016
    Inventors: BHASKAR SRINIVASAN, KHANH QUANG LE, COLLIN WHITE, SOPA CHEVACHAROENKUL, ASHLEY NORRIS, BERNARD JOHN FISCHER
  • Patent number: 9349445
    Abstract: Select devices for memory cell applications and methods of forming the same are described herein. As an example, one or more non-ohmic select devices can include at least two tunnel barrier regions formed between a first metal material and a second metal material, and a third metal material formed between each of the respective at least two tunnel barrier regions. The non-ohmic select device is a two terminal select device that supports bi-directional current flow therethrough.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: May 24, 2016
    Assignee: Micron Technology, Inc.
    Inventors: David H. Wells, Bhaskar Srinivasan, John K. Zahurak
  • Patent number: 9343665
    Abstract: A method of forming a non-volatile resistive oxide memory cell includes forming a first conductive electrode of the memory cell as part of a substrate. Metal oxide-comprising material is formed over the first conductive electrode. Etch stop material is deposited over the metal oxide-comprising material. Conductive material is deposited over the etch stop material. A second conductive electrode of the memory cell which comprises the conductive material received is formed over the etch stop material. Such includes etching through the conductive material to stop relative to the etch stop material and forming the non-volatile resistive oxide memory cell to comprise the first and second conductive electrodes having both the metal oxide-comprising material and the etch stop material therebetween. Other implementations are contemplated.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: May 17, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Nishant Sinha, John Smythe, Bhaskar Srinivasan, Gurtej S. Sandhu, Joseph Neil Greeley, Kunal R. Parekh