Patents by Inventor Wilson Ma

Wilson Ma 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: 10686035
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: June 16, 2020
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20190115427
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 18, 2019
    Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Patent number: 10121857
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: November 6, 2018
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20180240872
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Application
    Filed: May 1, 2015
    Publication date: August 23, 2018
    Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20160322459
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Application
    Filed: May 1, 2015
    Publication date: November 3, 2016
    Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Patent number: 9450050
    Abstract: This invention discloses configurations and methods to manufacture lateral power device including a super-junction structure with an avalanche clamp diode formed between the drain and the gate. The lateral super-junction structure reduces on-resistance, while the structural enhancements, including an avalanche clamping diode and an N buffer region, increase the breakdown voltage between substrate and drain and improve unclamped inductive switching (UIS) performance.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: September 20, 2016
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingping Guan, Yeeheng Lee, John Chen
  • Patent number: 9024375
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Grant
    Filed: August 26, 2012
    Date of Patent: May 5, 2015
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20150115333
    Abstract: This invention discloses configurations and methods to manufacture lateral power device including a super-junction structure with an avalanche clamp diode formed between the drain and the gate. The lateral super-junction structure reduces on-resistance, while the structural enhancements, including an avalanche clamping diode and an N buffer region, increase the breakdown voltage between substrate and drain and improve unclamped inductive switching (UIS) performance.
    Type: Application
    Filed: October 24, 2013
    Publication date: April 30, 2015
    Inventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingpeng Guan, Yeeheng Lee, John Chen
  • Patent number: 8969953
    Abstract: Self-aligned charge balanced semiconductor devices and methods for forming such devices are disclosed. One or more planar gates are formed over a semiconductor substrate of a first conductivity type. One or more deep trenches are etched in the semiconductor self-aligned to the planar gates. The trenches are filled with a semiconductor material of a second conductivity type such that the deep trenches are charge balanced with the adjacent regions of the semiconductor substrate Source and body regions are formed by implanting dopants onto the filled trenches. This process can form self-aligned charge balanced devices with a cell pitch less than 12 microns.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: March 3, 2015
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
  • Publication number: 20130341689
    Abstract: Self-aligned charge balanced semiconductor devices and methods for forming such devices are disclosed. One or more planar gates are formed over a semiconductor substrate of a first conductivity type. One or more deep trenches are etched in the semiconductor self-aligned to the planar gates. The trenches are filled with a semiconductor material of a second conductivity type such that the deep trenches are charge balanced with the adjacent regions of the semiconductor substrate Source and body regions are formed by implanting dopants onto the filled trenches. This process can form self-aligned charge balanced devices with a cell pitch less than 12 microns.
    Type: Application
    Filed: August 26, 2013
    Publication date: December 26, 2013
    Applicant: Alpha & Omega Semiconductor Incorporated
    Inventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
  • Patent number: 8575695
    Abstract: This invention discloses configurations and methods to manufacture lateral power device including a super-junction structure with an avalanche clamp diode formed between the drain and the gate. The lateral super-junction structure reduces on-resistance, while the structural enhancements, including an avalanche clamping diode and an N buffer region, increase the breakdown voltage between substrate and drain and improve unclamped inductive switching (UIS) performance.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: November 5, 2013
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingpeng Guan, Yeeheng Lee, John Chen
  • Publication number: 20130221430
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Application
    Filed: August 26, 2012
    Publication date: August 29, 2013
    Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Patent number: 8519476
    Abstract: Self-aligned charge balanced semiconductor devices and methods for forming such devices are disclosed. One or more planar gates are formed over a semiconductor substrate of a first conductivity type. One or more deep trenches are etched in the semiconductor self-aligned to the planar gates. The trenches are filled with a semiconductor material of a second conductivity type such that the deep trenches are charge balanced with the adjacent regions of the semiconductor substrate This process can form self-aligned charge balanced devices with a cell pitch less than 12 microns.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: August 27, 2013
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
  • Patent number: 8263482
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: September 11, 2012
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20110183499
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Application
    Filed: March 31, 2011
    Publication date: July 28, 2011
    Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20110147830
    Abstract: Self-aligned charge balanced semiconductor devices and methods for forming such devices are disclosed. One or more planar gates are formed over a semiconductor substrate of a first conductivity type. One or more deep trenches are etched in the semiconductor self-aligned to the planar gates. The trenches are filled with a semiconductor material of a second conductivity type such that the deep trenches are charge balanced with the adjacent regions of the semiconductor substrate This process can form self-aligned charge balanced devices with a cell pitch less than 12 microns.
    Type: Application
    Filed: December 21, 2009
    Publication date: June 23, 2011
    Applicant: Alpha and Omega Semiconductor Incorporated
    Inventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
  • Publication number: 20110127606
    Abstract: This invention discloses configurations and methods to manufacture lateral power device including a super junction structure with an avalanche clamp diode formed between the drain and the gate. The lateral super-junction structure reduces on-resistance, while the structural enhancements, including an avalanche clamping diode and an N buffer region, increase the breakdown voltage between substrate and drain and improve unclamped inductive switching (UIS) performance.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 2, 2011
    Inventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingpeng Guan, Yeeheng Lee, John Chen
  • Patent number: 7943989
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: May 17, 2011
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
  • Publication number: 20100163846
    Abstract: This invention discloses a semiconductor power device disposed in a semiconductor substrate and the semiconductor substrate has a plurality of trenches. Each of the trenches is filled with a plurality of epitaxial layers of alternating conductivity types constituting nano tubes functioning as conducting channels stacked as layers extending along a sidewall direction with a “Gap Filler” layer filling a merging-gap between the nano tubes disposed substantially at a center of each of the trenches. The “Gap Filler” layer can be very lightly doped Silicon or grown and deposited dielectric layer. In an exemplary embodiment, the plurality of trenches are separated by pillar columns each having a width approximately half to one-third of a width of the trenches.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen