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).
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Patent number: 10096588Abstract: 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: GrantFiled: September 30, 2017Date of Patent: October 9, 2018Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Madhur Bobde, Wenjiang Zeng, Limin Weng
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Publication number: 20180026025Abstract: 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: ApplicationFiled: September 30, 2017Publication date: January 25, 2018Applicant: Alpha and Omega Semiconductor IncorporatedInventors: MADHUR BOBDE, WENJIANG ZENG, LIMIN WENG
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Patent number: 9793254Abstract: 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: GrantFiled: December 9, 2014Date of Patent: October 17, 2017Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Madhur Bobde, Wenjiang Zeng, Limin Weng
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Publication number: 20170141097Abstract: 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: ApplicationFiled: December 9, 2014Publication date: May 18, 2017Inventors: Madhur Bobde, Wenjiang Zeng, Limin Weng
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Patent number: 8999807Abstract: 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: GrantFiled: May 27, 2010Date of Patent: April 7, 2015Assignee: Semiconductor Components Industries, LLCInventors: Li Jiang, Ryan J. Hurley, Sudhama C. Shastri, Yenting Wen, Wang-Chang Albert Gu, Phillip Holland, Der Min Liou, Rong Liu, Wenjiang Zeng
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Patent number: 8327523Abstract: 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: GrantFiled: November 28, 2006Date of Patent: December 11, 2012Assignee: Semiconductor Components Industries, LLCInventors: Adam J. Whitworth, Wenjiang Zeng
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Patent number: 8199447Abstract: 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: GrantFiled: January 4, 2010Date of Patent: June 12, 2012Assignee: Semiconductor Components Industries, LLCInventors: Harry Gee, Wenjiang Zeng, Jeffrey C. Dunnihoo
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Publication number: 20110291231Abstract: 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: ApplicationFiled: May 27, 2010Publication date: December 1, 2011Inventors: Li Jiang, Ryan J. Hurley, Sudhama C. Shastri, Yenting Wen, Wang-Chang Albert Gu, Phillip Holland, Der Min Liou, Rong Liu, Wenjiang Zeng
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Publication number: 20110163352Abstract: 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: ApplicationFiled: January 4, 2010Publication date: July 7, 2011Applicant: California Micro DevicesInventors: Harry Gee, Wenjiang Zeng, Jeffrey C. Dunnihoo
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Patent number: 7679473Abstract: 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: GrantFiled: January 15, 2008Date of Patent: March 16, 2010Assignee: California Micro DevicesInventors: Wenjiang Zeng, Rong Liu, Yupeng Chen, Wang-Chang Albert Gu
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Publication number: 20090179713Abstract: 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: ApplicationFiled: January 15, 2008Publication date: July 16, 2009Inventors: Wenjiang Zeng, Rong Liu, Yupeng Chen, Wang-Chang Albert Gu
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Publication number: 20080120828Abstract: 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: ApplicationFiled: November 28, 2006Publication date: May 29, 2008Inventors: Adam J. Whitworth, Wenjiang Zeng