Patents by Inventor Qixin Li

Qixin Li 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: 20200111876
    Abstract: Disclosed are an AlGaN/GaN heterojunction HEMT device compatible with a Si-CMOS process and a manufacturing method therefor. The device comprises: an AlGaN/GaN heterojunction epitaxial layer, a passivation layer, a gate dielectric layer, a gold-free gate electrode and gold-free source and drain electrodes. The AlGaN/GaN heterojunction epitaxial layer comprises a substrate, a nitride nucleating layer, a nitride buffer layer, a GaN channel layer, an AlGaN intrinsic barrier layer and an AlGaN heavily-doped layer from bottom to top in sequence; the AlGaN heavily-doped layer generates charges by an ionized donor so as to compensate for a surface acceptor level of a semiconductor, thus suppressing a current collapse; and ohmic contact with an electrode is formed by low-temperature annealing; and the gold-free electrode prevents Au from polluting a Si-CMOS process line.
    Type: Application
    Filed: August 29, 2018
    Publication date: April 9, 2020
    Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Hong WANG, Quanbin ZHOU, Qixin LI
  • Patent number: 10580879
    Abstract: An enhancement-mode GaN-based HEMT device on Si substrate and a manufacturing method thereof. The device includes a Si substrate, an AlN nucleation layer, AlGaN transition layers, an AlGaN buffer layer, a low temperature AlN insertion layer, an AlGaN main buffer layer, an AlGaN/GaN superlattice layer, an GaN channel layer, and an AlGaN barrier layer. Both sides of a top end of the HEMT device are a source electrode and a drain electrode respectively, and a middle of the top end is a gate electrode. A middle of the AlGaN barrier layer is etched through to form a recess, and a bottom of the recess is connected to the GaN channel layer. A passivation protective layer and a gate dielectric layer are deposited on the bottom of the recess, and the gate electrode is located above the dielectric layer.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: March 3, 2020
    Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Hong Wang, Quanbin Zhou, Qixin Li
  • Publication number: 20190109208
    Abstract: An enhancement-mode GaN-based HEMT device on Si substrate and a manufacturing method thereof. The device includes a Si substrate, an AlN nucleation layer, AlGaN transition layers, an AlGaN buffer layer, a low temperature AlN insertion layer, an AlGaN main buffer layer, an AlGaN/GaN superlattice layer, an GaN channel layer), and an AlGaN barrier layer. Both sides of a top end of the HEMT device are a source electrode and a drain electrode respectively, and a middle of the top end is a gate electrode. A middle of the AlGaN barrier layer is etched through to form a recess, and a bottom of the recess is connected to the GaN channel layer. A passivation protective layer and a gate dielectric layer are deposited on the bottom of the recess, and the gate electrode is located above the dielectric layer.
    Type: Application
    Filed: February 15, 2017
    Publication date: April 11, 2019
    Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
    Inventors: Hong WANG, Quanbin ZHOU, Qixin LI
  • Patent number: 8782475
    Abstract: A method of testing an interconnect between an electronic component and an external memory comprises receiving a data word having data bits and translating the data word into multiple cycles. The multiple cycles are transmitted through the interconnect to the external memory one after another such that a value of the data bit being transmitted is switched for each cycle. In another embodiment, an electronic component comprises an interface, a translation unit, and a test module. The translation module is configured to receive a burst from the external memory through the interface and is configured to translate the burst into a data word. The test module is configured to receive the data word from the translation module and is configured to compare the data word to a test pattern to detect an interconnect defect.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: July 15, 2014
    Assignee: Futurewei Technologies, Inc.
    Inventors: Zhiyuan Wang, Pu Wang, Qi Wu, Yufang Sun, Lisheng Wang, Qixin Li
  • Publication number: 20140122955
    Abstract: A method of testing an interconnect between an electronic component and an external memory comprises receiving a data word having data bits and translating the data word into multiple cycles. The multiple cycles are transmitted through the interconnect to the external memory one after another such that a value of the data bit being transmitted is switched for each cycle. In another embodiment, an electronic component comprises an interface, a translation unit, and a test module. The translation module is configured to receive a burst from the external memory through the interface and is configured to translate the burst into a data word. The test module is configured to receive the data word from the translation module and is configured to compare the data word to a test pattern to detect an interconnect defect.
    Type: Application
    Filed: December 28, 2012
    Publication date: May 1, 2014
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Zhiyuan Wang, Pu Wang, Qi Wu, Yufang Sun, Lisheng Wang, Qixin Li