Patents by Inventor Yao-Chung Chang

Yao-Chung Chang 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: 12388039
    Abstract: Various embodiments of the present disclosure are directed towards a three-dimensional (3D) IC comprising semiconductor substrates with different bandgaps. The 3D IC chip comprises a first IC chip and a second IC chip overlying and bonded to the first IC chip. The first IC chip comprises a first semiconductor substrate with a first bandgap, and further comprises and a first device on and partially formed by the first semiconductor substrate. The second IC chip comprises a second semiconductor substrate with a second bandgap different than the first bandgap, and further comprises a second device on the second semiconductor substrate.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: August 12, 2025
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yao-Chung Chang, Shih-Chien Liu, Chia-Jui Yu, Chun-Lin Tsai
  • Patent number: 12326988
    Abstract: A knob on a touch panel includes a rotary wheel, a common pad, at least one sensing pad, a plurality of connectors and a conductive ring. The rotary wheel is mounted on the touch panel. The common pad is deployed on the touch panel. The at least one sensing pad is deployed on the touch panel. Each of the plurality of connectors is coupled between the rotary wheel and one pad among the at least one sensing pad and the common pad, to control each of the at least one sensing pad to be coupled to the common pad or not through the rotary wheel according to an operation of the knob. The conductive ring is deployed on a surface of the rotary wheel, to detect a touch object.
    Type: Grant
    Filed: May 29, 2024
    Date of Patent: June 10, 2025
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Yao-Chung Chang, Chih-Chang Lai, Yun-Hsiang Yeh, Yen-Heng Chen, Chun-Yuan Liu
  • Publication number: 20240379836
    Abstract: The present disclosure provides a semiconductor structure. The semiconductor structure includes a gallium nitride (GaN) layer on a substrate; an aluminum gallium nitride (AlGaN) layer disposed on the GaN layer; a gate stack disposed on the AlGaN layer; a source feature and a drain feature disposed on the AlGaN layer and interposed by the gate stack; a dielectric material layer is disposed on the gate stack; and a field plate disposed on the dielectric material layer and electrically connected to the source feature, wherein the field plate includes a step-wise structure.
    Type: Application
    Filed: July 25, 2024
    Publication date: November 14, 2024
    Inventors: Wei Wang, Wei-Chen Yang, Yao-Chung Chang, Ru-Yi Su, Yen-Ku Lin, Chuan-Wei Tsou, Chun Lin Tsai
  • Publication number: 20240371951
    Abstract: Various embodiments of the present disclosure are directed towards a two-dimensional carrier gas (2DCG) semiconductor device comprising an ohmic source/drain electrode with a plurality of protrusions separated by gaps and protruding from a bottom surface of the ohmic source/drain electrode. The ohmic source/drain electrode overlies a semiconductor film, and the protrusions extend from the bottom surface into the semiconductor film. Further, the ohmic source/drain electrode is separated from another ohmic source/drain electrode that also overlies the semiconductor film. The semiconductor film comprises a channel layer and a barrier layer that are vertically stacked and directly contact at a heterojunction. The channel layer accommodates a 2DCG that extends along the heterojunction and is ohmically coupled to the ohmic source/drain electrode and the other ohmic source/drain electrode. A gate electrode overlies the semiconductor film between the ohmic source/drain electrode and the other source/drain electrode.
    Type: Application
    Filed: July 18, 2024
    Publication date: November 7, 2024
    Inventors: Shih-Chien Liu, Yao-Chung Chang, Chun Lin Tsai
  • Patent number: 12132088
    Abstract: Various embodiments of the present disclosure are directed towards a two-dimensional carrier gas (2DCG) semiconductor device comprising an ohmic source/drain electrode with a plurality of protrusions separated by gaps and protruding from a bottom surface of the ohmic source/drain electrode. The ohmic source/drain electrode overlies a semiconductor film, and the protrusions extend from the bottom surface into the semiconductor film. Further, the ohmic source/drain electrode is separated from another ohmic source/drain electrode that also overlies the semiconductor film. The semiconductor film comprises a channel layer and a barrier layer that are vertically stacked and directly contact at a heterojunction. The channel layer accommodates a 2DCG that extends along the heterojunction and is ohmically coupled to the ohmic source/drain electrode and the other ohmic source/drain electrode. A gate electrode overlies the semiconductor film between the ohmic source/drain electrode and the other source/drain electrode.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: October 29, 2024
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Shih-Chien Liu, Yao-Chung Chang, Chun Lin Tsai
  • Patent number: 12107156
    Abstract: A semiconductor structure includes: a channel layer; an active layer over the channel layer, wherein the active layer is configured to form a two-dimensional electron gas (2DEG) to be formed in the channel layer along an interface between the channel layer and the active layer; a gate electrode over a top surface of the active layer; and a source/drain electrode over the top surface of the active layer; wherein the active layer includes a first layer and a second layer sequentially disposed therein from the top surface to a bottom surface of the active layer, and the first layer possesses a higher aluminum (Al) atom concentration compared to the second layer. An HEMT structure and an associated method are also disclosed.
    Type: Grant
    Filed: December 19, 2022
    Date of Patent: October 1, 2024
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Yao-Chung Chang, Po-Chih Chen, Jiun-Lei Jerry Yu, Chun Lin Tsai
  • Publication number: 20240321736
    Abstract: The present disclosure relates an integrated chip. The integrated chip includes an isolation region disposed within a substrate and surrounding an active area. A gate structure is disposed over the substrate and has a base region and a gate extension finger protruding outward from a sidewall of the base region along a first direction to past opposing sides of the active area. A source contact and a drain contact are disposed within the active area. The drain contact is separated from the source contact by the gate extension finger. A first plurality of conductive contacts are arranged on the gate structure. The first plurality of conductive contacts are separated along the first direction by distances overlying the gate extension finger.
    Type: Application
    Filed: June 3, 2024
    Publication date: September 26, 2024
    Inventors: Shih-Pang Chang, Haw-Yun Wu, Yao-Chung Chang, Chun-Lin Tsai
  • Publication number: 20240310936
    Abstract: A knob on a touch panel includes a rotary wheel, a common pad, at least one sensing pad, a plurality of connectors and a conductive ring. The rotary wheel is mounted on the touch panel. The common pad is deployed on the touch panel. The at least one sensing pad is deployed on the touch panel. Each of the plurality of connectors is coupled between the rotary wheel and one pad among the at least one sensing pad and the common pad, to control each of the at least one sensing pad to be coupled to the common pad or not through the rotary wheel according to an operation of the knob. The conductive ring is deployed on a surface of the rotary wheel, to detect a touch object.
    Type: Application
    Filed: May 29, 2024
    Publication date: September 19, 2024
    Applicant: NOVATEK Microelectronics Corp.
    Inventors: Yao-Chung Chang, Chih-Chang Lai, Yun-Hsiang Yeh, Yen-Heng Chen, Chun-Yuan Liu
  • Patent number: 12046554
    Abstract: The present disclosure relates an integrated chip. The integrated chip includes an isolation region disposed within a substrate and surrounding an active area. A gate structure is disposed over the substrate and has a base region and a gate extension finger protruding outward from a sidewall of the base region along a first direction to past opposing sides of the active area. A source contact is disposed within the active area and a drain contact is disposed within the active area and is separated from the source contact by the gate extension finger. A first plurality of conductive contacts are arranged on the gate structure and separated along the first direction. The first plurality of conductive contacts are separated by distances overlying the gate extension finger.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: July 23, 2024
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Shih-Pang Chang, Haw-Yun Wu, Yao-Chung Chang, Chun-Lin Tsai
  • Publication number: 20240145554
    Abstract: Various embodiments of the present disclosure are directed towards a method for forming a semiconductor structure, the method includes forming a buffer layer over a substrate. An active layer is formed on the buffer layer. A top electrode is formed on the active layer. An etch process is performed on the buffer layer and the substrate to define a plurality of pillar structures. The plurality of pillar structures include a first pillar structure laterally offset from a second pillar structure. At least portions of the first and second pillar structures are spaced laterally between sidewalls of the top electrode.
    Type: Application
    Filed: January 11, 2024
    Publication date: May 2, 2024
    Inventors: Yao-Chung Chang, Chun Lin Tsai, Ru-Yi Su, Wei Wang, Wei-Chen Yang
  • Patent number: 11908905
    Abstract: Various embodiments of the present disclosure are directed towards a method for forming a semiconductor structure, the method includes forming a buffer layer over a substrate. An active layer is formed on the buffer layer. A top electrode is formed on the active layer. An etch process is performed on the buffer layer and the substrate to define a plurality of pillar structures. The plurality of pillar structures include a first pillar structure laterally offset from a second pillar structure. At least portions of the first and second pillar structures are spaced laterally between sidewalls of the top electrode.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: February 20, 2024
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yao-Chung Chang, Chun Lin Tsai, Ru-Yi Su, Wei Wang, Wei-Chen Yang
  • Patent number: 11906355
    Abstract: An in-cell optical sensing display panel includes a pixel array, a plurality of first optical sensors and a plurality of second optical sensors. The pixel array is disposed in an active area of the in-cell optical sensing display panel, and the active area includes a first region and a second region which surrounds the first region. The sensor array is disposed in the first region of the active area and is configured to sense a fingerprint of a finger touching a surface of the in-cell optical sensing display panel. The second optical sensors are disposed in the second region of the active area and are configured to sense ambient light, and the second optical sensors are not to be used for fingerprint sensing.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: February 20, 2024
    Assignee: Novatek Microelectronics Corp.
    Inventors: Yu-Ying Tang, Yao Chung Chang, Chih-Chang Lai
  • Publication number: 20240039815
    Abstract: An example method for using wireless packets to indicate boot status of a network device is disclosed. The method includes initiating a boot sequence of a network device. The method also includes during at least a portion of the boot sequence, transmitting a first wireless packet comprising data indicating a boot status of the network device, wherein the boot status indicates the network device is booting. The method also includes transmitting a second wireless packet comprising data indicating the boot status of the network device, wherein the boot status indicates the network device has finished booting.
    Type: Application
    Filed: October 6, 2023
    Publication date: February 1, 2024
    Inventors: Robert J. Pera, Yao-Chung Chang, Andrejs Bogdanovs
  • Publication number: 20230326890
    Abstract: Various embodiments of the present disclosure are directed towards a three-dimensional (3D) IC comprising semiconductor substrates with different bandgaps. The 3D IC chip comprises a first IC chip and a second IC chip overlying and bonded to the first IC chip. The first IC chip comprises a first semiconductor substrate with a first bandgap, and further comprises and a first device on and partially formed by the first semiconductor substrate. The second IC chip comprises a second semiconductor substrate with a second bandgap different than the first bandgap, and further comprises a second device on the second semiconductor substrate.
    Type: Application
    Filed: June 24, 2022
    Publication date: October 12, 2023
    Inventors: Yao-Chung Chang, Shih-Chien Liu, Chia-Jui Yu, Chun-Lin Tsai
  • Patent number: 11784900
    Abstract: An example method for using wireless packets to indicate boot status of a network device is disclosed. The method includes initiating a boot sequence of a network device. The method also includes during at least a portion of the boot sequence, transmitting a first wireless packet comprising data indicating a boot status of the network device, wherein the boot status indicates the network device is booting. The method also includes transmitting a second wireless packet comprising data indicating the boot status of the network device, wherein the boot status indicates the network device has finished booting.
    Type: Grant
    Filed: October 28, 2021
    Date of Patent: October 10, 2023
    Assignee: Ubiquiti Inc.
    Inventors: Robert J. Pera, Yao-Chung Chang, Andrejs Bogdanovs
  • Publication number: 20230120292
    Abstract: The present disclosure relates an integrated chip. The integrated chip includes an isolation region disposed within a substrate and surrounding an active area. A gate structure is disposed over the substrate and has a base region and a gate extension finger protruding outward from a sidewall of the base region along a first direction to past opposing sides of the active area. A source contact is disposed within the active area and a drain contact is disposed within the active area and is separated from the source contact by the gate extension finger. A first plurality of conductive contacts are arranged on the gate structure and separated along the first direction. The first plurality of conductive contacts are separated by distances overlying the gate extension finger.
    Type: Application
    Filed: February 15, 2022
    Publication date: April 20, 2023
    Inventors: Shih-Pang Chang, Haw-Yun Wu, Yao-Chung Chang, Chun-Lin Tsai
  • Publication number: 20230123907
    Abstract: A semiconductor structure includes: a channel layer; an active layer over the channel layer, wherein the active layer is configured to form a two-dimensional electron gas (2DEG) to be formed in the channel layer along an interface between the channel layer and the active layer; a gate electrode over a top surface of the active layer; and a source/drain electrode over the top surface of the active layer; wherein the active layer includes a first layer and a second layer sequentially disposed therein from the top surface to a bottom surface of the active layer, and the first layer possesses a higher aluminum (Al) atom concentration compared to the second layer. An HEMT structure and an associated method are also disclosed.
    Type: Application
    Filed: December 19, 2022
    Publication date: April 20, 2023
    Inventors: YAO-CHUNG CHANG, PO-CHIH CHEN, JIUN-LEI JERRY YU, CHUN LIN TSAI
  • Patent number: 11532740
    Abstract: A semiconductor structure includes: a channel layer; an active layer over the channel layer, wherein the active layer is configured to form a two-dimensional electron gas (2DEG) to be formed in the channel layer along an interface between the channel layer and the active layer; a gate electrode over a top surface of the active layer; and a source/drain electrode over the top surface of the active layer; wherein the active layer includes a first layer and a second layer sequentially disposed therein from the top surface to a bottom surface of the active layer, and the first layer possesses a higher aluminum (Al) atom concentration compared to the second layer. An HEMT structure and an associated method are also disclosed.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: December 20, 2022
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Yao-Chung Chang, Po-Chih Chen, Jiun-Lei Jerry Yu, Chun Lin Tsai
  • Publication number: 20220352325
    Abstract: Various embodiments of the present disclosure are directed towards a method for forming a semiconductor structure, the method includes forming a buffer layer over a substrate. An active layer is formed on the buffer layer. A top electrode is formed on the active layer. An etch process is performed on the buffer layer and the substrate to define a plurality of pillar structures. The plurality of pillar structures include a first pillar structure laterally offset from a second pillar structure. At least portions of the first and second pillar structures are spaced laterally between sidewalls of the top electrode.
    Type: Application
    Filed: July 18, 2022
    Publication date: November 3, 2022
    Inventors: Yao-Chung Chang, Chun Lin Tsai, Ru-Yi Su, Wei Wang, Wei-Chen Yang
  • Publication number: 20220336600
    Abstract: Various embodiments of the present disclosure are directed towards a two-dimensional carrier gas (2DCG) semiconductor device comprising an ohmic source/drain electrode with a plurality of protrusions separated by gaps and protruding from a bottom surface of the ohmic source/drain electrode. The ohmic source/drain electrode overlies a semiconductor film, and the protrusions extend from the bottom surface into the semiconductor film. Further, the ohmic source/drain electrode is separated from another ohmic source/drain electrode that also overlies the semiconductor film. The semiconductor film comprises a channel layer and a barrier layer that are vertically stacked and directly contact at a heterojunction. The channel layer accommodates a 2DCG that extends along the heterojunction and is ohmically coupled to the ohmic source/drain electrode and the other ohmic source/drain electrode. A gate electrode overlies the semiconductor film between the ohmic source/drain electrode and the other source/drain electrode.
    Type: Application
    Filed: June 21, 2021
    Publication date: October 20, 2022
    Inventors: Shih-Chien Liu, Yao-Chung Chang, Chun Lin Tsai