Patents by Inventor Wenjiang Zeng

Wenjiang Zeng 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: 10096588
    Abstract: A transient voltage suppressing (TVS) device formed in an epitaxial layer of a first conductivity type supported on a semiconductor substrate. The TVS device further comprises a plurality of contact trenches opened and extended to a lower part of the epitaxial layer filled with a doped polysilicon layer of a second conductivity type wherein the trenches are further surrounded by a heavy dopant region of the second conductivity type. The TVS device further includes a metal contact layer disposed on a top surface of the epitaxial layer electrically connected to a Vcc electrode wherein the metal contact layer further directly contacting the doped polysilicon layer and the heavy dopant region of the second conductivity type.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: October 9, 2018
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Madhur Bobde, Wenjiang Zeng, Limin Weng
  • Publication number: 20180026025
    Abstract: A transient voltage suppressing (TVS) device formed in an epitaxial layer of a first conductivity type supported on a semiconductor substrate. The TVS device further comprises a plurality of contact trenches opened and extended to a lower part of the epitaxial layer filled with a doped polysilicon layer of a second conductivity type wherein the trenches are further surrounded by a heavy dopant region of the second conductivity type. The TVS device further includes a metal contact layer disposed on a top surface of the epitaxial layer electrically connected to a Vcc electrode wherein the metal contact layer further directly contacting the doped polysilicon layer and the heavy dopant region of the second conductivity type.
    Type: Application
    Filed: September 30, 2017
    Publication date: January 25, 2018
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: MADHUR BOBDE, WENJIANG ZENG, LIMIN WENG
  • Patent number: 9793254
    Abstract: A transient voltage suppressing (TVS) device formed in an epitaxial layer of a first conductivity type supported on a semiconductor substrate. The TVS device further comprises a plurality of contact trenches opened and extended to a lower part of the epitaxial layer filled with a doped polysilicon layer of a second conductivity type wherein the trenches are further surrounded by a heavy dopant region of the second conductivity type. The TVS device further includes a metal contact layer disposed on a top surface of the epitaxial layer electrically connected to a Vcc electrode wherein the metal contact layer further directly contacting the doped polysilicon layer and the heavy dopant region of the second conductivity type.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: October 17, 2017
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Madhur Bobde, Wenjiang Zeng, Limin Weng
  • Publication number: 20170141097
    Abstract: A transient voltage suppressing (TVS) device formed in an epitaxial layer of a first conductivity type supported on a semiconductor substrate. The TVS device further comprises a plurality of contact trenches opened and extended to a lower part of the epitaxial layer filled with a doped polysilicon layer of a second conductivity type wherein the trenches are further surrounded by a heavy dopant region of the second conductivity type. The TVS device further includes a metal contact layer disposed on a top surface of the epitaxial layer electrically connected to a Vcc electrode wherein the metal contact layer further directly contacting the doped polysilicon layer and the heavy dopant region of the second conductivity type.
    Type: Application
    Filed: December 9, 2014
    Publication date: May 18, 2017
    Inventors: Madhur Bobde, Wenjiang Zeng, Limin Weng
  • Patent number: 8999807
    Abstract: A semiconductor component and methods for manufacturing the semiconductor component that includes a monolithically integrated common mode choke. In accordance with embodiments, a transient voltage suppression device may be coupled to the monolithically integrated common mode choke.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: April 7, 2015
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Li Jiang, Ryan J. Hurley, Sudhama C. Shastri, Yenting Wen, Wang-Chang Albert Gu, Phillip Holland, Der Min Liou, Rong Liu, Wenjiang Zeng
  • Patent number: 8327523
    Abstract: There is provided a method of making two electrically separated inductors using deposition and wet-etching techniques, which inductors are formed by interwinding one of the inductors within the other inductor on the same planar level. In still another aspect of the invention, there is provided a method of making various levels inductors, each level having at least two electrically separated inductors, using deposition and wet-etching techniques. The inductors on each planar level are formed by interwinding one of the inductors within the other inductor, and then stacking these in a preferred manner. In still another aspect, there is provided a manner of connecting together inductors formed according to the above methods in order to achieve various inductor configurations.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: December 11, 2012
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Adam J. Whitworth, Wenjiang Zeng
  • Patent number: 8199447
    Abstract: A semiconductor device is described that includes one or more electrostatic discharge (ESD) protection circuits. Each circuit comprises reverse-biased steering diodes connected in series between power rail and signal ground, a bypass Zener diode and a substrate Zener diode. The Zener diodes provide ESD protection and the steering diode cooperate with the substrate Zener diode to provide a bypass function that is substantially symmetric about the signal ground. Noise in the circuit can be shunted using internal and/or external capacitances that can be implemented as Zener diodes.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: June 12, 2012
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Harry Gee, Wenjiang Zeng, Jeffrey C. Dunnihoo
  • Publication number: 20110291231
    Abstract: A semiconductor component and methods for manufacturing the semiconductor component that includes a monolithically integrated common mode choke. In accordance with embodiments, a transient voltage suppression device may be coupled to the monolithically integrated common mode choke.
    Type: Application
    Filed: May 27, 2010
    Publication date: December 1, 2011
    Inventors: Li Jiang, Ryan J. Hurley, Sudhama C. Shastri, Yenting Wen, Wang-Chang Albert Gu, Phillip Holland, Der Min Liou, Rong Liu, Wenjiang Zeng
  • Publication number: 20110163352
    Abstract: A semiconductor device is described that includes one or more electrostatic discharge (ESD) protection circuits. Each circuit comprises reverse-biased steering diodes connected in series between power rail and signal ground, a bypass Zener diode and a substrate Zener diode. The Zener diodes provide ESD protection and the steering diode cooperate with the substrate Zener diode to provide a bypass function that is substantially symmetric about the signal ground. Noise in the circuit can be shunted using internal and/or external capacitances that can be implemented as Zener diodes.
    Type: Application
    Filed: January 4, 2010
    Publication date: July 7, 2011
    Applicant: California Micro Devices
    Inventors: Harry Gee, Wenjiang Zeng, Jeffrey C. Dunnihoo
  • Patent number: 7679473
    Abstract: The present invention relates to a low pass filter incorporating coupled inductors to enhance stop band attenuation. In one embodiment, the coupled inductors are provided along with various capacitors to provide for superior performance within a smaller surface area of a semiconductor or ceramic integrated device. In a further specific embodiment, the capacitors are formed on an integrated device within an area on which entirely intertwined inductors are formed. In another embodiment, at least one further pair of coupled inductors is included to create additional frequency attenuation notches, as well as a wide stop-band.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: March 16, 2010
    Assignee: California Micro Devices
    Inventors: Wenjiang Zeng, Rong Liu, Yupeng Chen, Wang-Chang Albert Gu
  • Publication number: 20090179713
    Abstract: The present invention relates to a low pass filter incorporating coupled inductors to enhance stop band attenuation. In one embodiment, the coupled inductors are provided along with various capacitors to provide for superior performance within a smaller surface area of a semiconductor or ceramic integrated device. In a further specific embodiment, the capacitors are formed on an integrated device within an area on which entirely intertwined inductors are formed. In another embodiment, at least one further pair of coupled inductors is included to create additional frequency attenuation notches, as well as a wide stop-band.
    Type: Application
    Filed: January 15, 2008
    Publication date: July 16, 2009
    Inventors: Wenjiang Zeng, Rong Liu, Yupeng Chen, Wang-Chang Albert Gu
  • Publication number: 20080120828
    Abstract: There is provided a method of making two electrically separated inductors using deposition and wet-etching techniques, which inductors are formed by interwinding one of the inductors within the other inductor on the same planar level. In still another aspect of the invention, there is provided a method of making various levels inductors, each level having at least two electrically separated inductors, using deposition and wet-etching techniques. The inductors on each planar level are formed by interwinding one of the inductors within the other inductor, and then stacking these in a preferred manner. In still another aspect, there is provided a manner of connecting together inductors formed according to the above methods in order to achieve various inductor configurations.
    Type: Application
    Filed: November 28, 2006
    Publication date: May 29, 2008
    Inventors: Adam J. Whitworth, Wenjiang Zeng