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).
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Patent number: 10686035Abstract: 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: GrantFiled: October 9, 2018Date of Patent: June 16, 2020Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20190115427Abstract: 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: ApplicationFiled: October 9, 2018Publication date: April 18, 2019Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Patent number: 10121857Abstract: 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: GrantFiled: May 1, 2015Date of Patent: November 6, 2018Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20180240872Abstract: 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: ApplicationFiled: May 1, 2015Publication date: August 23, 2018Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20160322459Abstract: 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: ApplicationFiled: May 1, 2015Publication date: November 3, 2016Inventors: Hamza Yilmaz, Daniel Ng, Lingping Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Patent number: 9450050Abstract: 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: GrantFiled: October 24, 2013Date of Patent: September 20, 2016Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingping Guan, Yeeheng Lee, John Chen
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Patent number: 9024375Abstract: 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: GrantFiled: August 26, 2012Date of Patent: May 5, 2015Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20150115333Abstract: 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: ApplicationFiled: October 24, 2013Publication date: April 30, 2015Inventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingpeng Guan, Yeeheng Lee, John Chen
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Patent number: 8969953Abstract: 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: GrantFiled: August 26, 2013Date of Patent: March 3, 2015Assignee: Alpha and Omega Semiconductor IncorporatedInventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
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Publication number: 20130341689Abstract: 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: ApplicationFiled: August 26, 2013Publication date: December 26, 2013Applicant: Alpha & Omega Semiconductor IncorporatedInventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
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Lateral super junction device with high substrate-drain breakdown and built-in avalanche clamp diode
Patent number: 8575695Abstract: 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: GrantFiled: November 30, 2009Date of Patent: November 5, 2013Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingpeng Guan, Yeeheng Lee, John Chen -
Publication number: 20130221430Abstract: 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: ApplicationFiled: August 26, 2012Publication date: August 29, 2013Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Patent number: 8519476Abstract: 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: GrantFiled: December 21, 2009Date of Patent: August 27, 2013Assignee: Alpha and Omega Semiconductor IncorporatedInventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
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Patent number: 8263482Abstract: 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: GrantFiled: March 31, 2011Date of Patent: September 11, 2012Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20110183499Abstract: 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: ApplicationFiled: March 31, 2011Publication date: July 28, 2011Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20110147830Abstract: 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: ApplicationFiled: December 21, 2009Publication date: June 23, 2011Applicant: Alpha and Omega Semiconductor IncorporatedInventors: John Chen, Yeeheng Lee, Lingpeng Guan, Moses Ho, Wilson Ma, Anup Bhalla, Hamza Yilmaz
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Lateral super junction device with high substrate-drain breakdwon and built-in avalanche clamp diode
Publication number: 20110127606Abstract: 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: ApplicationFiled: November 30, 2009Publication date: June 2, 2011Inventors: Madhur Bobde, Anup Bhalla, Hamza Yilmaz, Wilson Ma, Lingpeng Guan, Yeeheng Lee, John Chen -
Patent number: 7943989Abstract: 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: GrantFiled: December 31, 2008Date of Patent: May 17, 2011Assignee: Alpha and Omega Semiconductor IncorporatedInventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen
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Publication number: 20100163846Abstract: 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: ApplicationFiled: December 31, 2008Publication date: July 1, 2010Inventors: Hamza Yilmaz, Daniel Ng, Lingpeng Guan, Anup Bhalla, Wilson Ma, Moses Ho, John Chen