Patents by Inventor Po-Chao Tsao

Po-Chao Tsao 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: 20240019491
    Abstract: A die-level electrical parameter extraction method includes: obtaining electrical parameters of a plurality of transistor types; obtaining measurement results of a plurality of logic blocks; estimating a mapping relationship between the electrical parameters of the plurality of transistor types and the measurement results of the plurality of logic blocks; and regarding a specific die of a wafer, obtaining die-level measurement of the plurality of logic blocks, and generating die-level electrical parameters of the plurality of transistor types according to the mapping relationship and the die-level measurement results.
    Type: Application
    Filed: June 7, 2023
    Publication date: January 18, 2024
    Applicant: MEDIATEK INC.
    Inventors: Jia-Horng Shieh, Po-Chao Tsao, Ming-Cheng Lee, Tung-Hsing Lee, Chi-Ming Lee, Yi-Ju Ting
  • Publication number: 20230223276
    Abstract: A semiconductor structure is provided. The semiconductor structure includes an insulator layer, first and second field-effect transistor devices, an isolation field-effect transistor device, front-side gate and back-side gate contacts. Each of the first and second field-effect transistor devices and the isolation field-effect transistor device includes a fin structure and first and second epitaxial source/drain structures. The fin structure includes channel layers and a gate structure that is wrapped around the channel layers. The first and second epitaxial source/drain structures are connected to opposite sides of the channel layers. The isolation field-effect transistor device is kept in the off-state. The front-side gate contact is formed on the first field-effect transistor device and electrically connected to the gate structure of the first field-effect transistor device.
    Type: Application
    Filed: December 19, 2022
    Publication date: July 13, 2023
    Inventors: Po-Chao TSAO, Hsien-Hsin LIN
  • Publication number: 20230223465
    Abstract: A semiconductor device is provided. The semiconductor device includes a substrate, a fin structure and an epitaxial source/drain structure. The substrate includes a substrate layer and an insulator layer on the substrate layer. The fin structure is formed over the substrate, wherein the fin structure includes a gate structure and channel layers wrapped by the gate structure. The epitaxial source/drain structure is connected to the channel layers, wherein a bottom portion of the epitaxial source/drain structure is in contact with the insulator layer of the substrate.
    Type: Application
    Filed: December 12, 2022
    Publication date: July 13, 2023
    Inventors: Po-Chao TSAO, Hsien-Hsin LIN
  • Publication number: 20230128880
    Abstract: A semiconductor device includes a substrate, a first cell and a second cell on the substrate. The first cell includes a first diffusion region in the substrate, a first gate structure over the first diffusion region, and a first contact over the first diffusion region. The first contact is disposed on one side of the first gate structure. The second cell that abuts the first cell includes a second diffusion region in the substrate, a second gate structure over the second diffusion region and a second contact over the second diffusion region. The second contact that is positioned on one side of the second gate structure is adjacent to the first contact of the first cell. The first contact and the second contact are equipotential when the semiconductor device is in operation. The second diffusion region and the first diffusion region form a continuous diffusion region.
    Type: Application
    Filed: September 29, 2022
    Publication date: April 27, 2023
    Inventor: Po-Chao TSAO
  • Publication number: 20230080688
    Abstract: A semiconductor structure includes the first semiconductor stack and the second semiconductor stack formed over the first region and the second region of a substrate, respectively. The first and second semiconductor stacks extend in the first direction and are spaced apart from each other in the second direction. Each of the first semiconductor stack and the second semiconductor stack includes channel layers and a gate structure. The channel layers are formed above the substrate and are spaced apart from each other in the third direction. The gate structure includes the gate dielectric layers formed around the respective channel layers, and the gate electrode layer formed on the gate dielectric layers to surround the channel layers. The number of channel layers in the first semiconductor stack is different from the number of channel layers in the second semiconductor stack.
    Type: Application
    Filed: November 9, 2022
    Publication date: March 16, 2023
    Inventor: Po-Chao TSAO
  • Patent number: 11532617
    Abstract: A semiconductor structure includes the first semiconductor stack and the second semiconductor stack formed over the first region and the second region of a substrate, respectively. The first and second semiconductor stacks extend in the first direction and are spaced apart from each other in the second direction. Each of the first semiconductor stack and the second semiconductor stack includes channel layers and a gate structure. The channel layers are formed above the substrate and are spaced apart from each other in the third direction. The gate structure includes the gate dielectric layers formed around the respective channel layers, and the gate electrode layer formed on the gate dielectric layers to surround the channel layers. The number of channel layers in the first semiconductor stack is different from the number of channel layers in the second semiconductor stack.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: December 20, 2022
    Assignee: MEDIATEK INC.
    Inventor: Po-Chao Tsao
  • Patent number: 11424204
    Abstract: A semiconductor component is provided. The semiconductor component includes a substrate and a pad. The pad has an upper surface and a slot, wherein the slot is recessed with respect to the upper surface.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: August 23, 2022
    Assignee: MEDIATEK INC.
    Inventors: Po-Chao Tsao, Yu-Hua Huang
  • Publication number: 20210335675
    Abstract: A semiconductor structure is provided. The semiconductor structure includes a shallow trench isolation (STI) region on a well region of a substrate, a plurality of transistors, and a power rail. Each of the transistors includes at least one fin, a gate electrode formed on the fin, and a doping region formed on the fin. The fin is formed on the well region, and is extending in a first direction. The gate electrode is extending in a second direction that is perpendicular to the first direction. The power rail is formed in the STI region and below the doping regions of the transistors, and extending in the first direction. Each of the doping regions is electrically connected to the power rail, so as to form a source region of the respective transistor. The power rail is electrically connected to the well region of the substrate.
    Type: Application
    Filed: July 7, 2021
    Publication date: October 28, 2021
    Applicant: MediaTek Inc.
    Inventor: Po-Chao Tsao
  • Publication number: 20210313317
    Abstract: A semiconductor structure includes the first semiconductor stack and the second semiconductor stack formed over the first region and the second region of a substrate, respectively. The first and second semiconductor stacks extend in the first direction and are spaced apart from each other in the second direction. Each of the first semiconductor stack and the second semiconductor stack includes channel layers and a gate structure. The channel layers are formed above the substrate and are spaced apart from each other in the third direction. The gate structure includes the gate dielectric layers formed around the respective channel layers, and the gate electrode layer formed on the gate dielectric layers to surround the channel layers. The number of channel layers in the first semiconductor stack is different from the number of channel layers in the second semiconductor stack.
    Type: Application
    Filed: December 28, 2020
    Publication date: October 7, 2021
    Inventor: Po-Chao TSAO
  • Patent number: 11094594
    Abstract: A semiconductor structure is provided. The semiconductor structure includes a shallow trench isolation (STI) region on a well region of a substrate, a plurality of transistors, and a power rail. Each of the transistors includes at least one fin, a gate electrode formed on the fin, and a doping region formed on the fin. The fin is formed on the well region, and is extending in a first direction. The gate electrode is extending in a second direction that is perpendicular to the first direction. The power rail is formed in the STI region and below the doping regions of the transistors, and extending in the first direction. Each of the doping regions is electrically connected to the power rail, so as to form a source region of the respective transistor. The power rail is electrically connected to the well region of the substrate.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: August 17, 2021
    Assignee: MediaTek Inc.
    Inventor: Po-Chao Tsao
  • Publication number: 20210050315
    Abstract: A semiconductor component is provided. The semiconductor component includes a substrate and a pad. The pad has an upper surface and a slot, wherein the slot is recessed with respect to the upper surface.
    Type: Application
    Filed: July 14, 2020
    Publication date: February 18, 2021
    Inventors: Po-Chao TSAO, Yu-Hua HUANG
  • Publication number: 20190080969
    Abstract: A semiconductor structure is provided. The semiconductor structure includes a shallow trench isolation (STI) region on a well region of a substrate, a plurality of transistors, and a power rail. Each of the transistors includes at least one fin, a gate electrode formed on the fin, and a doping region formed on the fin. The fin is formed on the well region, and is extending in a first direction. The gate electrode is extending in a second direction that is perpendicular to the first direction. The power rail is formed in the STI region and below the doping regions of the transistors, and extending in the first direction. Each of the doping regions is electrically connected to the power rail, so as to form a source region of the respective transistor. The power rail is electrically connected to the well region of the substrate.
    Type: Application
    Filed: August 9, 2018
    Publication date: March 14, 2019
    Inventor: Po-Chao TSAO
  • Patent number: 10049929
    Abstract: The present invention provides a method of forming a semiconductor structure including a substrate, a transistor, a first ILD layer, a second ILD layer, a first contact plug, second contact plug and a third contact plug. The transistor is disposed on the substrate and includes a gate and a source/drain region. The first ILD layer is disposed on the transistor. The first contact plug is disposed in the first ILD layer and a top surface of the first contact plug is higher than a top surface of the gate. The second ILD layer is disposed on the first ILD layer. The second contact plug is disposed in the second ILD layer and electrically connected to the first contact plug. The third contact plug is disposed in the first ILD layer and the second ILD layer and electrically connected to the gate.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: August 14, 2018
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Ching-Wen Hung, Chih-Sen Huang, Po-Chao Tsao, Chieh-Te Chen
  • Patent number: 9847331
    Abstract: A semiconductor integrated circuit includes a substrate, a multi-gate transistor device positioned on the substrate, and an LDMOS device positioned on the substrate. The substrate includes a plurality of first isolation structures and a plurality of second isolation structures. A depth of the first isolation structures is smaller than a depth of the second isolation structures. The multi-gate transistor device includes a plurality of first fin structures and a first gate electrode. The first fin structures are parallel with each other and spaced apart from each other by the first isolation structures. The first gate electrode is intersectionally arranged with the first fin structures, and covers a portion of each first fin structure. The LDMOS device includes a second gate electrode covering on the substrate. The LDMOS device is electrically isolated from the multi-gate transistor device by another second isolation structure.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: December 19, 2017
    Assignee: UNITED MICROELECTONICS CORP.
    Inventor: Po-Chao Tsao
  • Publication number: 20170077094
    Abstract: A semiconductor integrated circuit includes a substrate, a multi-gate transistor device positioned on the substrate, and an LDMOS device positioned on the substrate. The substrate includes a plurality of first isolation structures and a plurality of second isolation structures. A depth of the first isolation structures is smaller than a depth of the second isolation structures. The multi-gate transistor device includes a plurality of first fin structures and a first gate electrode. The first fin structures are parallel with each other and spaced apart from each other by the first isolation structures. The first gate electrode is intersectionally arranged with the first fin structures, and covers a portion of each first fin structure. The LDMOS device includes a second gate electrode covering on the substrate. The LDMOS device is electrically isolated from the multi-gate transistor device by another second isolation structure.
    Type: Application
    Filed: November 22, 2016
    Publication date: March 16, 2017
    Inventor: Po-Chao Tsao
  • Patent number: 9548302
    Abstract: A semiconductor integrated circuit includes a substrate, a multi-gate transistor device formed on the substrate, and an n-well resistor formed in the substrate. The substrate includes a plurality of first isolation structures and at least a second isolation structure formed therein. A depth of the first isolation structures is smaller than a depth of the second isolation structure. The multi-gate transistor device includes a plurality of fin structures, and the fin structures are parallel with each other and spaced apart from each other by the first isolation structures. The n-well resistor includes at least one first isolation structure. The n-well resistor and the multi-gate transistor device are electrically isolated from each other by the second isolation structure.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: January 17, 2017
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventor: Po-Chao Tsao
  • Patent number: 9530862
    Abstract: A manufacturing method of semiconductor devices having metal gate includes following steps. A substrate having a first semiconductor device and a second semiconductor device formed thereon is provided. The first semiconductor device includes a first gate trench and the second semiconductor device includes a second gate trench. A first work function metal layer is formed in the first gate trench and the second gate trench. A portion of the first work function metal layer is removed from the second gate trench. A second work function metal layer is formed in the first gate trench and the second gate trench. The second work function metal layer and the first work function metal layer include the same metal material. A third work function metal layer and a gap-filling metal layer are sequentially formed in the first gate trench and the second gate trench.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: December 27, 2016
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Po-Chao Tsao, Chien-Ting Lin, Chien-Ming Lai, Chi-Mao Hsu
  • Patent number: 9455176
    Abstract: The present invention provides a semiconductor structure including a substrate, at least one fin group and a plurality of sub-fin structures disposed on the substrate, wherein the fin group is disposed between two sub-fin structures, and a top surface of each sub-fin structure is lower than a top surface of the fin group; and a shallow trench isolation (STI) disposed in the substrate, wherein the sub-fin structures are completely covered by the shallow trench isolation.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: September 27, 2016
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Po-Chao Tsao, Lung-En Kuo, Chien-Ting Lin, Shih-Fang Tzou
  • Patent number: 9449964
    Abstract: A semiconductor structure includes a metal gate, a second dielectric layer and a contact plug. The metal gate is located on a substrate and in a first dielectric layer, wherein the metal gate includes a work function metal layer having a U-shaped cross-sectional profile and a low resistivity material located on the work function metal layer. The second dielectric layer is located on the metal gate and the first dielectric layer. The contact plug is located on the second dielectric layer and in a third dielectric layer, thereby a capacitor is formed. Moreover, the present invention also provides a semiconductor process forming said semiconductor structure.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: September 20, 2016
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Ching-Wen Hung, Chih-Sen Huang, Po-Chao Tsao
  • Publication number: 20160197005
    Abstract: The present invention provides a semiconductor structure including a substrate, at least one fin group and a plurality of sub-fin structures disposed on the substrate, wherein the fin group is disposed between two sub-fin structures, and a top surface of each sub-fin structure is lower than a top surface of the fin group; and a shallow trench isolation (STI) disposed in the substrate, wherein the sub-fin structures are completely covered by the shallow trench isolation.
    Type: Application
    Filed: March 17, 2016
    Publication date: July 7, 2016
    Inventors: Po-Chao Tsao, Lung-En Kuo, Chien-Ting Lin, Shih-Fang Tzou