Patents by Inventor Tsung-Che TSAI

Tsung-Che TSAI 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: 9922969
    Abstract: Integrated circuits and methods of producing the same are provided. In an exemplary embodiment, an integrated circuit includes a substrate and a source in electrical communication with the substrate. A drain is also in electrical communication with the substrate. A gate overlies the substrate between the source and the drain, wherein a channel is defined within the substrate directly underlying the gate, and where a Schottky portion of the substrate is positioned between the channel and the source.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: March 20, 2018
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Tsung-Che Tsai, Vaddagere Nagaraju Vasantha Kumar, Wei Gao
  • Patent number: 9887275
    Abstract: A method of forming an integrated circuit device includes forming a gate stack covering a middle portion of a semiconductor fin, forming a gate spacer layer over the gate stack and the semiconductor fin, and patterning the gate spacer layer. The resulting spacers include a gate spacer on a sidewall of the gate stack, and a fin spacer on a sidewall of an end portion of the semiconductor fin. The fin spacer is then etched. When the etching is finished, a height of the fin spacer is smaller than about a half of the height of the semiconductor fin.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: February 6, 2018
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jam-Wem Lee, Tsung-Che Tsai, Yi-Feng Chang
  • Publication number: 20170310103
    Abstract: Integrated circuits with electrostatic discharge (ESD) protection and methods of providing ESD protection in an integrated circuit are provided. An ESD protection circuit the ESD protection circuit may incorporate a transistor, such as a MOSFET, and a voltage limiter coupled to a gate of the transistor. The voltage limiter may be configured such that with an ESD disturbance on the voltage supply rail, Vdd, a gate voltage of the transistor of the ESD protection circuit is held below the supply voltage (Vdd) inducing base current, Isub, within the transistor to effectively shunt a current arising from the ESD event from the voltage supply rail Vdd to the voltage supply rail Vss.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 26, 2017
    Inventors: Wei Gao, Manjunatha Prabhu, Tsung-Che Tsai
  • Patent number: 9741849
    Abstract: Integrated circuits and methods of producing such integrated circuits are provided. In an exemplary embodiment, an integrated circuit includes a heavily doped source area having conductivity determining impurities at a heavily doped source concentration and a lightly doped drain area having conductivity determining impurities at a lightly doped drain concentration less than the heavily doped source concentration. A drain conductor directly contacts the lightly doped drain area, and a channel is positioned between the heavily doped source area and the lightly doped drain area. A gate overlies the channel.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: August 22, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Chien-Hsin Lee, Mahadeva Iyer Natarajan, Xiangxiang Lu, Tsung-Che Tsai, Manjunatha Prabhu
  • Publication number: 20170117390
    Abstract: A method of forming an integrated circuit device includes forming a gate stack covering a middle portion of a semiconductor fin, forming a gate spacer layer over the gate stack and the semiconductor fin, and patterning the gate spacer layer. The resulting spacers include a gate spacer on a sidewall of the gate stack, and a fin spacer on a sidewall of an end portion of the semiconductor fin. The fin spacer is then etched. When the etching is finished, a height of the fin spacer is smaller than about a half of the height of the semiconductor fin.
    Type: Application
    Filed: January 4, 2017
    Publication date: April 27, 2017
    Inventors: Jam-Wem Lee, Tsung-Che Tsai, Yi-Feng Chang
  • Patent number: 9601627
    Abstract: An embodiment integrated circuit (e.g., diode) and method of making the same. The embodiment integrated circuit includes a well having a first doping type formed over a substrate having the first doping type, the well including a fin, a source formed over the well on a first side of the fin, the source having a second doping type, a drain formed over the well on a second side of the fin, the drain having the first doping type, and a gate oxide formed over the fin, the gate oxide laterally spaced apart from the source by a back off region of the fin. The integrated circuit is compatible with a FinFET fabrication process.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: March 21, 2017
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee
  • Patent number: 9576945
    Abstract: Methods and apparatus for increased holding voltage SCRs. A semiconductor device includes a semiconductor substrate of a first conductivity type; a first well of the first conductivity type; a second well of a second conductivity type adjacent to the first well, an intersection of the first well and the second well forming a p-n junction; a first diffused region of the first conductivity type formed at the first well and coupled to a ground terminal; a first diffused region of the second conductivity type formed at the first well; a second diffused region of the first conductivity type formed at the second well and coupled to a pad terminal; a second diffused region of the second conductivity type formed in the second well; and a Schottky junction formed adjacent to the first diffused region of the second conductivity type coupled to a ground terminal. Methods for forming devices are disclosed.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: February 21, 2017
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jam-Wem Lee, Tzu-Heng Chang, Tsung-Che Tsai, Ming-Hsiang Song
  • Publication number: 20170040311
    Abstract: A diode string having a plurality of diodes for ESD protection of a CMOS IC device comprises a first diode and a last diode in the diode string, wherein the first diode and the last diode are both formed on a bottom layer in a silicon substrate, and remaining diodes in the diode string. The remaining diodes are formed on a top layer placed on top of the bottom layer. The diode string further comprises a plurality of conductive lines that connect the first diode and the last diode on the bottom layer sequentially with the remaining diodes on the top layer to form a three dimensional (3D) structure of the diode string.
    Type: Application
    Filed: October 24, 2016
    Publication date: February 9, 2017
    Inventors: Tsung-Che TSAI, Jam-Wem LEE
  • Patent number: 9548367
    Abstract: An integrated circuit device includes a semiconductor substrate, insulation regions extending into the semiconductor substrate, and a semiconductor fin protruding above the insulation regions. The insulation regions have a first portion and a second portion, with the first portion and the second portion on opposite sides of the semiconductor fin. The semiconductor fin has a first height. The integrated circuit device further includes a gate stack over a middle portion of the semiconductor fin, and a fin spacer on a sidewall of an end portion of the semiconductor fin. The fin spacer has a second height. The first height is greater than about two times the second height.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: January 17, 2017
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jam-Wem Lee, Tsung-Che Tsai, Yi-Feng Chang
  • Patent number: 9484338
    Abstract: A diode string having a plurality of diodes for ESD protection of a CMOS IC device comprises a first diode and a last diode in the diode string, wherein the first diode and the last diode are both formed on a bottom layer in a silicon substrate, and remaining diodes in the diode string. The remaining diodes are formed on a top layer placed on top of the bottom layer. The diode string further comprises a plurality of conductive lines that connect the first diode and the last diode on the bottom layer sequentially with the remaining diodes on the top layer to form a three dimensional (3D) structure of the diode string.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: November 1, 2016
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Tsung-Che Tsai, Jam-Wem Lee
  • Publication number: 20160284849
    Abstract: An embodiment integrated circuit (e.g., diode) and method of making the same. The embodiment integrated circuit includes a well having a first doping type formed over a substrate having the first doping type, the well including a fin, a source formed over the well on a first side of the fin, the source having a second doping type, a drain formed over the well on a second side of the fin, the drain having the first doping type, and a gate oxide formed over the fin, the gate oxide laterally spaced apart from the source by a back off region of the fin. The integrated circuit is compatible with a FinFET fabrication process.
    Type: Application
    Filed: June 13, 2016
    Publication date: September 29, 2016
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee
  • Patent number: 9368629
    Abstract: An embodiment integrated circuit (e.g., diode) and method of making the same. The embodiment integrated circuit includes a well having a first doping type formed over a substrate having the first doping type, the well including a fin, a source formed over the well on a first side of the fin, the source having a second doping type, a drain formed over the well on a second side of the fin, the drain having the first doping type, and a gate oxide formed over the fin, the gate oxide laterally spaced apart from the source by a back off region of the fin. The integrated circuit is compatible with a FinFET fabrication process.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: June 14, 2016
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee
  • Publication number: 20160099241
    Abstract: One or more techniques or systems for forming an n-type metal oxide semiconductor (NMOS) transistor for electrostatic discharge (ESD) are provided herein. In some embodiments, the NMOS transistor includes a first region, a first n-type plus (NP) region, a first p-type plus (PP) region, a second NP region, a second PP region, a shallow trench isolation (STI) region, and a gate stack. In some embodiments, the first PP region is between the first NP region and the second NP region. In some embodiments, the second NP region is between the first PP region and the second PP region, the gate stack is between the first PP region and the second NP region, the STI region is between the second NP region and the second PP region. Accordingly, the first PP region enables ESD current to discharge based on a low trigger voltage for the NMOS transistor.
    Type: Application
    Filed: December 14, 2015
    Publication date: April 7, 2016
    Inventors: Tsung-Che Tsai, Jam-Wem Lee
  • Publication number: 20160093705
    Abstract: A method of forming an integrated circuit device includes forming a gate stack covering a middle portion of a semiconductor fin, forming a gate spacer layer over the gate stack and the semiconductor fin, and patterning the gate spacer layer. The resulting spacers include a gate spacer on a sidewall of the gate stack, and a fin spacer on a sidewall of an end portion of the semiconductor fin. The fin spacer is then etched. When the etching is finished, a height of the fin spacer is smaller than about a half of the height of the semiconductor fin.
    Type: Application
    Filed: December 7, 2015
    Publication date: March 31, 2016
    Inventors: Jam-Wem Lee, Tsung-Che Tsai, Yi-Feng Chang
  • Patent number: 9236733
    Abstract: A semiconductor device is disclosed that includes a first well of a first conductivity type, a second well of a second conductivity type, a plurality of first regions, a second region and a plurality of electrodes. The first regions are of the first conductivity type and are formed in the second well. The second region is of the second conductivity type and is formed in the first well. Each of the electrodes is formed upon the second well and between adjacent two first regions of the first regions.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: January 12, 2016
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Yu-Ti Su, Wun-Jie Lin, Tsung-Che Tsai, Jen-Chou Tseng
  • Patent number: 9214540
    Abstract: One or more techniques or systems for forming an n-type metal oxide semiconductor (NMOS) transistor for electrostatic discharge (ESD) are provided herein. In some embodiments, the NMOS transistor includes a first region, a first n-type plus (NP) region, a first p-type plus (PP) region, a second NP region, a second PP region, a shallow trench isolation (STI) region, and a gate stack. In some embodiments, the first PP region is between the first NP region and the second NP region. In some embodiments, the second NP region is between the first PP region and the second PP region, the gate stack is between the first PP region and the second NP region, the STI region is between the second NP region and the second PP region. Accordingly, the first PP region enables ESD current to discharge based on a low trigger voltage for the NMOS transistor.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: December 15, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company Limited
    Inventors: Tsung-Che Tsai, Jam-Wem Lee
  • Patent number: 9209265
    Abstract: A device includes a semiconductor substrate, and an insulation region extending from a top surface of the semiconductor substrate into the semiconductor substrate. The device further includes a first node and a second node, and an Electro-Static Discharge (ESD) device coupled between the first node and the second node. The ESD device includes a semiconductor fin adjacent to and over a top surface of the insulation region. The ESD device is configured to, in response to an ESD transient on the first node, conduct a current from the first node to the second node.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: December 8, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee
  • Patent number: 9209302
    Abstract: A method of forming an integrated circuit device includes forming a gate stack covering a middle portion of a semiconductor fin, forming a gate spacer layer over the gate stack and the semiconductor fin, and patterning the gate spacer layer. The resulting spacers include a gate spacer on a sidewall of the gate stack, and a fin spacer on a sidewall of an end portion of the semiconductor fin. The fin spacer is then etched. When the etching is finished, a height of the fin spacer is smaller than about a half of the height of the semiconductor fin.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: December 8, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee
  • Publication number: 20150295088
    Abstract: An embodiment integrated circuit (e.g., diode) and method of making the same. The embodiment integrated circuit includes a well having a first doping type formed over a substrate having the first doping type, the well including a fin, a source formed over the well on a first side of the fin, the source having a second doping type, a drain formed over the well on a second side of the fin, the drain having the first doping type, and a gate oxide formed over the fin, the gate oxide laterally spaced apart from the source by a back off region of the fin. The integrated circuit is compatible with a FinFET fabrication process.
    Type: Application
    Filed: June 26, 2015
    Publication date: October 15, 2015
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee
  • Patent number: 9093492
    Abstract: An embodiment integrated circuit (e.g., diode) and method of making the same. The embodiment integrated circuit includes a well having a first doping type formed over a substrate having the first doping type, the well including a fin, a source formed over the well on a first side of the fin, the source having a second doping type, a drain formed over the well on a second side of the fin, the drain having the first doping type, and a gate oxide formed over the fin, the gate oxide laterally spaced apart from the source by a back off region of the fin. The integrated circuit is compatible with a FinFET fabrication process.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: July 28, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Tsung-Che Tsai, Yi-Feng Chang, Jam-Wem Lee