Patents by Inventor Guru Mathur

Guru Mathur 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).

  • Patent number: 11721738
    Abstract: An integrated circuit includes a power transistor having at least one transistor finger that lies within a semiconductor material substrate. Each transistor finger has a source region stripe and a substantially parallel drain region stripe. A gate structure lies between the source region stripe and the drain region stripe and has a plurality of fingers that extend over the source region stripe. Contacts are formed that connect to the fingers of the gate structure over thick oxide islands in the source region stripes. A conductive gate runner is connected to the contacts of the gate layer structure over the thick oxide islands in the source region stripe.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: August 8, 2023
    Assignee: Texas Instmments Incorporated
    Inventors: Sameer Pendharkar, Guru Mathur
  • Publication number: 20220052195
    Abstract: A semiconductor device having a vertical drain extended MOS transistor may be formed by forming deep trench structures to define vertical drift regions of the transistor, so that each vertical drift region is bounded on at least two opposite sides by the deep trench structures. The deep trench structures are spaced so as to form RESURF regions for the drift region. Trench gates are formed in trenches in the substrate over the vertical drift regions. The body regions are located in the substrate over the vertical drift regions.
    Type: Application
    Filed: November 1, 2021
    Publication date: February 17, 2022
    Inventors: Marie DENISON, Sameer PENDHARKAR, Guru MATHUR
  • Patent number: 11189721
    Abstract: A semiconductor device having a vertical drain extended MOS transistor may be formed by forming deep trench structures to define vertical drift regions of the transistor, so that each vertical drift region is bounded on at least two opposite sides by the deep trench structures. The deep trench structures are spaced so as to form RESURF regions for the drift region. Trench gates are formed in trenches in the substrate over the vertical drift regions. The body regions are located in the substrate over the vertical drift regions.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: November 30, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Marie Denison, Sameer Pendharkar, Guru Mathur
  • Publication number: 20210193809
    Abstract: An integrated circuit includes a power transistor having at least one transistor finger that lies within a semiconductor material substrate. Each transistor finger has a source region stripe and a substantially parallel drain region stripe. A gate structure lies between the source region stripe and the drain region stripe and has a plurality of fingers that extend over the source region stripe. Contacts are formed that connect to the fingers of the gate structure over thick oxide islands in the source region stripes. A conductive gate runner is connected to the contacts of the gate layer structure over the thick oxide islands in the source region stripe.
    Type: Application
    Filed: March 10, 2021
    Publication date: June 24, 2021
    Inventors: Sameer Pendharkar, Guru Mathur
  • Patent number: 10957774
    Abstract: An integrated circuit includes a power transistor having at least one transistor finger that lies within a semiconductor material substrate. Each transistor finger has a source region stripe and a substantially parallel drain region stripe. A gate structure lies between the source region stripe and the drain region stripe and has a plurality of fingers that extend over the source region stripe. Contacts are formed that connect to the fingers of the gate structure over thick oxide islands in the source region stripes. A conductive gate runner is connected to the contacts of the gate layer structure over the thick oxide islands in the source region stripe.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: March 23, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sameer Pendharkar, Guru Mathur
  • Patent number: 10937905
    Abstract: A semiconductor device includes at least a first transistor including at least a second level metal layer (second metal layer) above a first level metal layer coupled by a source contact to a source region doped with a first dopant type. The second level metal layer is coupled by a drain contact to a drain region doped with the first dopant type. A gate stack is between the source region and drain region having the second level metal layer coupled by a contact thereto. The second level metal layer is coupled by a contact to a first isolation region doped with the second dopant type. The source region and drain region are within the first isolation region. A second isolation region doped with the first dopant type encloses the first isolation region, and is not coupled to the second level metal layer so that it electrically floats.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: March 2, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yongxi Zhang, Philip L. Hower, Sameer P. Pendharkar, John Lin, Guru Mathur, Scott Balster, Victor Sinow
  • Publication number: 20200381552
    Abstract: A semiconductor device having a vertical drain extended MOS transistor may be formed by forming deep trench structures to define vertical drift regions of the transistor, so that each vertical drift region is bounded on at least two opposite sides by the deep trench structures. The deep trench structures are spaced so as to form RESURF regions for the drift region. Trench gates are formed in trenches in the substrate over the vertical drift regions. The body regions are located in the substrate over the vertical drift regions.
    Type: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Inventors: Marie DENISON, Sameer PENDHARKAR, Guru MATHUR
  • Patent number: 10811530
    Abstract: A semiconductor device having a vertical drain extended MOS transistor may be formed by forming deep trench structures to define vertical drift regions of the transistor, so that each vertical drift region is bounded on at least two opposite sides by the deep trench structures. The deep trench structures are spaced so as to form RESURF regions for the drift region. Trench gates are formed in trenches in the substrate over the vertical drift regions. The body regions are located in the substrate over the vertical drift regions.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: October 20, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Marie Denison, Sameer Pendharkar, Guru Mathur
  • 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
  • Patent number: 10580775
    Abstract: A semiconductor device adopts an isolation scheme to protect low voltage transistors from high voltage operations. The semiconductor device includes a substrate, a buried layer, a transistor well region, a first trench, and a second trench. The substrate has a top surface and a bottom surface. The buried layer is positioned within the substrate, and the transistor well region is positioned above the buried layer. The first trench extends from the top surface to penetrate the buried layer, and the first trench has a first trench depth. The second trench extending from the top surface to penetrate the buried layer. The second trench is interposed between the first trench and the transistor well region. The second trench has a second trench depth that is less than the first trench depth.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: March 3, 2020
    Assignee: Texas Instruments Incorporated
    Inventors: Sameer Pendharkar, Binghua Hu, Alexei Sadovnikov, Guru Mathur
  • Patent number: 10319809
    Abstract: A semiconductor device contains an LDNMOS transistor with a lateral n-type drain drift region and a p-type RESURF region over the drain drift region. The RESURF region extends to a top surface of a substrate of the semiconductor device. The semiconductor device includes a shunt which is electrically coupled between the RESURF region and a low voltage node of the LDNMOS transistor. The shunt may be a p-type implanted layer in the substrate between the RESURF layer and a body of the LDNMOS transistor, and may be implanted concurrently with the RESURF layer. The shunt may be through an opening in the drain drift region from the RESURF layer to the substrate under the drain drift region. The shunt may be include metal interconnect elements including contacts and metal interconnect lines.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: June 11, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yongxi Zhang, Philip L. Hower, John Lin, Guru Mathur, Scott G. Balster, Constantin Bulucea, Zachary K. Lee, Sameer P. Pendharkar
  • 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
  • Publication number: 20190006514
    Abstract: An integrated circuit includes a power transistor having at least one transistor finger that lies within a semiconductor material substrate. Each transistor finger has a source region stripe and a substantially parallel drain region stripe. A gate structure lies between the source region stripe and the drain region stripe and has a plurality of fingers that extend over the source region stripe. Contacts are formed that connect to the fingers of the gate structure over thick oxide islands in the source region stripes. A conductive gate runner is connected to the contacts of the gate layer structure over the thick oxide islands in the source region stripe.
    Type: Application
    Filed: September 11, 2018
    Publication date: January 3, 2019
    Inventors: Sameer Pendharkar, Guru Mathur
  • Patent number: 10163678
    Abstract: Forming a semiconductor structure by forming a plurality of trenches in a semiconductor material, forming a plurality of non-conductive structures in the plurality of trenches, and forming a doped region of the first conductivity type. The plurality of trenches are spaced apart from each other, have substantially equal depths, and include a first trench and a second trench. The plurality of non-conductive structures include a first non-conductive structure in the first trench and a second non-conductive structure in the second trench. The doped region is formed between the first non-conductive structure and the second non-conductive structure. No region of a second conductivity type lies horizontally in between the first non-conductive structure and the second non-conductive structure.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: December 25, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Binghua Hu, Sameer Pendharkar, Guru Mathur, Takehito Tamura
  • 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: 10103258
    Abstract: An integrated circuit includes a power transistor having at least one transistor finger that lies within a semiconductor material substrate. Each transistor finger has a source region stripe and a substantially parallel drain region stripe. A gate structure lies between the source region stripe and the drain region stripe and has a plurality of fingers that extend over the source region stripe. Contacts are formed that connect to the fingers of the gate structure over thick oxide islands in the source region stripes. A conductive gate runner is connected to the contacts of the gate layer structure over the thick oxide islands in the source region stripe.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: October 16, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sameer Pendharkar, Guru Mathur
  • Patent number: 10062777
    Abstract: A semiconductor device having a vertical drain extended MOS transistor may be formed by forming deep trench structures to define vertical drift regions of the transistor, so that each vertical drift region is bounded on at least two opposite sides by the deep trench structures. The deep trench structures are spaced so as to form RESURF regions for the drift region. Trench gates are formed in trenches in the substrate over the vertical drift regions. The body regions are located in the substrate over the vertical drift regions.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: August 28, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Marie Denison, Sameer Pendharkar, Guru Mathur
  • Publication number: 20180190814
    Abstract: An integrated circuit includes a power transistor having at least one transistor finger that lies within a semiconductor material substrate. Each transistor finger has a source region stripe and a substantially parallel drain region stripe. A gate structure lies between the source region stripe and the drain region stripe and has a plurality of fingers that extend over the source region stripe. Contacts are formed that connect to the fingers of the gate structure over thick oxide islands in the source region stripes. A conductive gate runner is connected to the contacts of the gate layer structure over the thick oxide islands in the source region stripe.
    Type: Application
    Filed: December 29, 2016
    Publication date: July 5, 2018
    Inventors: Sameer Pendharkar, Guru Mathur
  • Publication number: 20180108729
    Abstract: A semiconductor device contains an LDNMOS transistor with a lateral n-type drain drift region and a p-type RESURF region over the drain drift region. The RESURF region extends to a top surface of a substrate of the semiconductor device. The semiconductor device includes a shunt which is electrically coupled between the RESURF region and a low voltage node of the LDNMOS transistor. The shunt may be a p-type implanted layer in the substrate between the RESURF layer and a body of the LDNMOS transistor, and may be implanted concurrently with the RESURF layer. The shunt may be through an opening in the drain drift region from the RESURF layer to the substrate under the drain drift region. The shunt may be include metal interconnect elements including contacts and metal interconnect lines.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 19, 2018
    Inventors: Yongxi Zhang, Philip L. Hower, John Lin, Guru Mathur, Scott G. Balster, Constantin Bulucea, Zachary K. Lee, Sameer P. Pendharkar