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).
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Publication number: 20240304719Abstract: 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: ApplicationFiled: May 17, 2024Publication date: September 12, 2024Inventors: Marie DENISON, Sameer PENDHARKAR, Guru MATHUR
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Patent number: 12034074Abstract: 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: GrantFiled: November 1, 2021Date of Patent: July 9, 2024Assignee: Texas Instruments IncorporatedInventors: Marie Denison, Sameer Pendharkar, Guru Mathur
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Patent number: 11721738Abstract: 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: GrantFiled: March 10, 2021Date of Patent: August 8, 2023Assignee: Texas Instmments IncorporatedInventors: Sameer Pendharkar, Guru Mathur
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Publication number: 20220052195Abstract: 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: ApplicationFiled: November 1, 2021Publication date: February 17, 2022Inventors: Marie DENISON, Sameer PENDHARKAR, Guru MATHUR
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Patent number: 11189721Abstract: 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: GrantFiled: August 17, 2020Date of Patent: November 30, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Marie Denison, Sameer Pendharkar, Guru Mathur
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Publication number: 20210193809Abstract: 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: ApplicationFiled: March 10, 2021Publication date: June 24, 2021Inventors: Sameer Pendharkar, Guru Mathur
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Patent number: 10957774Abstract: 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: GrantFiled: September 11, 2018Date of Patent: March 23, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sameer Pendharkar, Guru Mathur
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Patent number: 10937905Abstract: 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: GrantFiled: May 23, 2014Date of Patent: March 2, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Yongxi Zhang, Philip L. Hower, Sameer P. Pendharkar, John Lin, Guru Mathur, Scott Balster, Victor Sinow
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Publication number: 20200381552Abstract: 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: ApplicationFiled: August 17, 2020Publication date: December 3, 2020Inventors: Marie DENISON, Sameer PENDHARKAR, Guru MATHUR
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Patent number: 10811530Abstract: 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: GrantFiled: June 30, 2017Date of Patent: October 20, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Marie Denison, Sameer Pendharkar, Guru Mathur
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Patent number: 10608075Abstract: 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: GrantFiled: January 4, 2019Date of Patent: March 31, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
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Patent number: 10580775Abstract: 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: GrantFiled: August 21, 2017Date of Patent: March 3, 2020Assignee: Texas Instruments IncorporatedInventors: Sameer Pendharkar, Binghua Hu, Alexei Sadovnikov, Guru Mathur
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Patent number: 10319809Abstract: 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: GrantFiled: December 15, 2017Date of Patent: June 11, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Yongxi Zhang, Philip L. Hower, John Lin, Guru Mathur, Scott G. Balster, Constantin Bulucea, Zachary K. Lee, Sameer P. Pendharkar
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Publication number: 20190157379Abstract: 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: ApplicationFiled: January 4, 2019Publication date: May 23, 2019Inventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
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Patent number: 10177215Abstract: 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: GrantFiled: October 25, 2017Date of Patent: January 8, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Bhaskar Srinivasan, Guru Mathur, Stephen Arlon Meisner, Shih Chang Chang, Corinne Ann Gagnet
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Publication number: 20190006514Abstract: 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: ApplicationFiled: September 11, 2018Publication date: January 3, 2019Inventors: Sameer Pendharkar, Guru Mathur
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Patent number: 10163678Abstract: 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: GrantFiled: April 9, 2015Date of Patent: December 25, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Binghua Hu, Sameer Pendharkar, Guru Mathur, Takehito Tamura
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Patent number: 10157915Abstract: 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: GrantFiled: October 25, 2017Date of Patent: December 18, 2018Assignee: Texas Instruments IncorporatedInventors: Bhaskar Srinivasan, Shih Chang Chang, Poornika Gayathri Fernandes, Haowen Bu, Guru Mathur
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Patent number: 10103258Abstract: 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: GrantFiled: December 29, 2016Date of Patent: October 16, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sameer Pendharkar, Guru Mathur
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Patent number: 10062777Abstract: 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: GrantFiled: April 12, 2017Date of Patent: August 28, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Marie Denison, Sameer Pendharkar, Guru Mathur