Patents by Inventor Zhaoxia Bi

Zhaoxia Bi 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).

  • Publication number: 20220246797
    Abstract: A method for fabrication of an InGaN semiconductor template, comprising growing an InGaN pyramid having inclined facets on a semiconductor substrate; processing the pyramid by removing semiconductor material to form a truncated pyramid having a first upper surface; growing InGaN, over the first upper surface, to form an InGaN template layer having a c-plane crystal facet forming a top surface. The InGaN semiconductor template is suitable for further fabrication of semiconductor devices, such as microLEDs configured to emit red, green or blue light.
    Type: Application
    Filed: March 18, 2020
    Publication date: August 4, 2022
    Inventors: Zhaoxia BI, Jonas OHLSSON, Lars SAMUELSON
  • Patent number: 11342477
    Abstract: A method of making a semiconductor device, comprising: forming a plurality of semiconductor seeds of a first III-nitride material through a mask provided over a substrate; growing a second III-nitride semiconductor material; planarizing the grown second semiconductor material to form a plurality of discrete base elements having a substantially planar upper surface. Preferably the step of planarizing involves performing atomic distribution of III type atoms of the grown second semiconductor material under heating to form the planar upper surface, and without supply of III type atoms is carried out during the step of planarization.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: May 24, 2022
    Assignee: HEXAGEM AB
    Inventors: Lars Samuelson, Jonas Ohlsson, Zhaoxia Bi
  • Publication number: 20210202236
    Abstract: A method of making a semiconductor device, comprising: forming a plurality of semiconductor seeds of a first Ill-nitride material through a mask provided over a substrate; growing a second Ill-nitride semiconductor material on the seeds; planarizing the grown second semiconductor material to form a cohesive structure from the plurality of discrete base elements, said cohesive structure having a substantially planar upper surface.
    Type: Application
    Filed: April 3, 2017
    Publication date: July 1, 2021
    Inventors: Jonas Ohlsson, Lars Samuelson, Zhaoxia Bi, Rafal Ciechonski, Kristian Storm
  • Publication number: 20210184071
    Abstract: A method of making a semiconductor device, comprising: forming a plurality of semiconductor seeds of a first III-nitride material through a mask provided over a substrate; growing a second III-nitride semiconductor material; planarizing the grown second semiconductor material to form a plurality of discrete base elements having a substantially planar upper surface. Preferably the step of planarizing involves performing atomic distribution of III type atoms of the grown second semiconductor material under heating to form the planar upper surface, and without supply of III type atoms is carried out during the step of planarization.
    Type: Application
    Filed: February 13, 2017
    Publication date: June 17, 2021
    Inventors: Lars Samuelson, Jonas Ohlsson, Zhaoxia Bi
  • Patent number: 9947831
    Abstract: A light emitting diode (LED) includes a plurality of Group III-nitride nanowires extending from a substrate, at least one Group III-nitride pyramidal shell layer located on each of the plurality of Group III-nitride nanowires, a continuous Group III-nitride pyramidal layer located over the at least one Group III-nitride pyramidal shell layer, and a continuous pyramidal contact layer located over the continuous Group III-nitride pyramidal layer. The at least one Group III-nitride pyramidal shell layer is located in an active region of the LED. The plurality of Group III-nitride nanowires are doped one of n- or p-type. The continuous Group III-nitride pyramidal layer is doped another one of p- or n-type to form a junction with the plurality of Group III-nitride nanowires. A distance from a side portion of the continuous contact layer to the plurality of Group III-nitride nanowires is shorter than a distance of an apex of the continuous contact layer to the plurality of Group III-nitride nanowires.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: April 17, 2018
    Assignee: QUNANO AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi, Jonas Ohlsson, Lars Ivar Samuelson
  • Publication number: 20170229613
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Application
    Filed: April 21, 2017
    Publication date: August 10, 2017
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi, Jonas Ohlsson, Lars Ivar Samuelson
  • Patent number: 9660136
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: May 23, 2017
    Assignee: QUNANO AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi, Jonas Ohlsson, Lars Ivar Samuelson
  • Publication number: 20150221817
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Application
    Filed: April 14, 2015
    Publication date: August 6, 2015
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi, Jonas Ohlsson, Lars Ivar Samuelson
  • Patent number: 9024338
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: May 5, 2015
    Assignee: QuNano AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi, Jonas Ohlsson, Lars Ivar Samuelson
  • Publication number: 20140061586
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Application
    Filed: November 7, 2013
    Publication date: March 6, 2014
    Applicant: QuNano AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi
  • Patent number: 8664094
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: March 4, 2014
    Assignee: QuNano AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi
  • Patent number: 8309439
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: November 13, 2012
    Assignee: QuNano AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi
  • Publication number: 20110143472
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Application
    Filed: November 8, 2010
    Publication date: June 16, 2011
    Applicant: QuNano AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi
  • Patent number: 7829443
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: November 9, 2010
    Assignee: QuNano AB
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi
  • Publication number: 20100163840
    Abstract: The present invention relates to the growing of nitride semiconductors, applicable for a multitude of semiconductor devices such as diodes, LEDs and transistors. According to the method of the invention nitride semiconductor nanowires are grown utilizing a CVD based selective area growth technique. A nitrogen source and a metal-organic source are present during the nanowire growth step and at least the nitrogen source flow rate is continuous during the nanowire growth step. The V/III-ratio utilized in the inventive method is significantly lower than the V/III-ratios commonly associated with the growth of nitride based semiconductor.
    Type: Application
    Filed: January 14, 2008
    Publication date: July 1, 2010
    Inventors: Werner Seifert, Damir Asoli, Zhaoxia Bi