Patents Assigned to The Hong Kong University of Science an Technology
  • Publication number: 20070291842
    Abstract: An optimal denoising method for video coding. This method makes use of very few pixels and linear operations, and can be embedded into the motion compensation process of video encoders. This method is simple and flexible, yet offers high performance and produces appealing pictures.
    Type: Application
    Filed: May 18, 2007
    Publication date: December 20, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Oscar AU, Liwei GUO
  • Publication number: 20070278518
    Abstract: A method of fabricating AlGaN/GaN enhancement-mode heterostructure field-effect transistors (HFET) using fluorine-based plasma immersion or ion implantation. The method includes: 1) generating gate patterns; 2) exposing the AlGaN/GaN heterostructure in the gate region to fluorine-based plasma treatment with photoresist as the treatment mask in a self-aligned manner; 3) depositing the gate metal to the plasma treated AlGaN/GaN heterostructure surface; 4) lifting off the metal except the gate electrode; and 5) high temperature post-gate annealing of the sample. This method can be used to shift the threshold voltage of a HFET toward a more positive value, and ultimately convert a depletion-mode HFET to an enhancement-mode HFET (E-HFET).
    Type: Application
    Filed: November 29, 2006
    Publication date: December 6, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Jing Chen, Yong Cai, Kei Lau
  • Publication number: 20070280255
    Abstract: An efficient media streaming method utilizing a globally load balanced overlay network. This method makes use of capacity per out-degree values to construct and maintain an overlay network for media streaming in a Peer-to-Peer environment.
    Type: Application
    Filed: April 25, 2007
    Publication date: December 6, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Danny Tsang, Hao Luan, Kin-Wah Kwong
  • Publication number: 20070258677
    Abstract: An electrooptically tunable waveguide-coupled microresonator. In one example embodiment, the switch includes a photoalignment layer that enhances control of liquid crystal alignment in the cladding near the coupling region of the microresonator and waveguide.
    Type: Application
    Filed: April 24, 2007
    Publication date: November 8, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Vladimir Chigrinov, Linjie Zhou, Alexander Muravsky, Andrew Poon
  • Publication number: 20070236406
    Abstract: A three dimensional (3D) fractal structure with H as the mother element is hereby disclosed. Such a 3D structure can act as selective total microwave reflectors or selective microwave filters in transmission. When excited through current injection, such a 3D fractal structure can act as highly efficient antenna for radiating or detecting pre-determined microwaves, with the relevant wavelength much larger than the size of the radiation or detection structure.
    Type: Application
    Filed: April 5, 2006
    Publication date: October 11, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Weijia Wen, Ping Sheng, Bo Hou
  • Publication number: 20070236312
    Abstract: A waveguide structure is described wherein microwaves or radio-frequency waves can be guided in their propagation through channels whose cross-sections contain fractal patterns, with relevant dimensions much smaller than the wavelengths of the guided waves. A finite section of such waveguide can be used as an efficient delay line.
    Type: Application
    Filed: April 5, 2006
    Publication date: October 11, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Weijia Wen, Ping Sheng, Che Ting Chan, Lei Zhou, Bo Hou
  • Publication number: 20070228416
    Abstract: A method for and devices utilizing monolithic integration of enhancement-mode and depletion-mode AlGaN/GaN heterojunction field-effect transistors (HFETs) is disclosed. Source and drain ohmic contacts of HFETs are first defined. Gate electrodes of the depletion-mode HFETs are then defined. Gate electrodes of the enhancement-mode HFETs are then defined using fluoride-based plasma treatment and high temperature post-gate annealing of the sample. Device isolation is achieved by either mesa etching or fluoride-based plasma treatment. This method provides a complete planar process for GaN-based integrated circuits favored in high-density and high-speed applications.
    Type: Application
    Filed: November 29, 2006
    Publication date: October 4, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Jing Chen, Yong Cai, Kei Lau
  • Patent number: 7276257
    Abstract: The present invention provides a preparation for treatment or prevention of a condition in a patient, said preparation comprising Schisandrin B. The concentration of Schisandrin B in the preparation may be between about 0.01 and about 0.1%, or it may be between about 20 and about 40% w/w or w/v. The preparation may additionally comprise one or more components selected from the group consisting of herbal extracts, fluids, solvents, antioxidants, preservatives, electrolytes, salts and pH control agents.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: October 2, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventor: Kam Ming Ko
  • Patent number: 7268634
    Abstract: A novel form of an integrated variable inductor uses an on-chip transformer together with a variable capacitor. The variable capacitor can either be a varactor or a switched capacitor array and is connected to the secondary coil of the transformer. By changing the capacitance at the secondary coil of a transformer, the equivalent inductance looking into the primary coil of the transformer can be adjusted. With another capacitor in parallel to the primary coil, two different modes of resonance inherently exist, and a very wide frequency tuning range can be achieved by combining the two modes.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: September 11, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Howard Cam Luong, Lai Kan Leung
  • Publication number: 20070207224
    Abstract: This invention relates to a novel soy isoflavone product with high purities and strong biological activities and the method of producing the same from natural soybeans, soybean materials (i.e. tofu dregs, soy molasses) and other plant sources. The method includes three steps consisting of extraction with an organic solvent, hydrolysis using an acid and crystallization using an antisolvent. The procedure is very simple and thus can be easily adapted for large-scale manufacturing. Moreover, the procedure is able to produce a high yield of total isoflavones at a lower cost. HPLC analysis and E-Screen bioassay reveal that the obtained product not only contains a high content of isoflavone aglycones by weight of dry matter but also exhibits strong estrogenic activity toward human cells. Therefore, the product should be efficacious for relieving menopausal symptoms and other estrogen-deficient diseases and can be used in health care supplements or as additives for foods, beverages or cosmetics.
    Type: Application
    Filed: January 12, 2007
    Publication date: September 6, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Ka Ming NG, Qian Luo, Jingnan Zhang, Benny Harjo
  • Publication number: 20070191477
    Abstract: The present invention provides a composition (e.g., a pharmaceutical composition) for reducing aging-related mitochondrial antioxidant status changes in a subject, wherein the composition comprises Schisandrin B. The present invention further provides a composition (e.g., a pharmaceutical composition) for reducing ischemia-reperfusion injury in an aging subject, wherein the composition comprises Schisandrin B. Also provided are methods for reducing aging-related mitochondrial antioxidant status changes and/or for reducing ischemia-reperfusion injury in an aging subject using the same.
    Type: Application
    Filed: April 4, 2007
    Publication date: August 16, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventor: Kam KO
  • Patent number: 7256568
    Abstract: A single inductor multiple-input multiple-output (SI-MIMO) switching converter time-multiplexes different input power sources through only one inductor to provide multiple regulated output voltages, which can be used to power up different blocks of a portable electronic device (or whatever else it is used for) and at the same time to charge up a rechargeable battery. Power multiplexing is achieved by input switches that are also the switching elements of the switching converter, thus eliminating an additional power multiplexer.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: August 14, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Yat Hei Lam, Wing Hung Ki, Chi Ying Tsui
  • Publication number: 20070181947
    Abstract: A semiconductor device may include a substrate and an insulating layer formed on the substrate. A multi-layer fin may be formed on the insulating layer and may include two semiconducting layers isolated by an insulating layer in vertical direction. A first MOS type device comprising a first source region, a first channel region and a first drain region is arranged on the first semiconducting layer in the multi-layer fin. A second MOS type device comprising a second source region, a second channel region and a second drain region is arranged on the second semiconducting layer in the multi-layer fin. A gate electrode is provided so as to be vertically adjacent to the first and second channel regions.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 9, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Philip Ching Ho Chan, Man Sun Chan, Xusheng Wu, Shengdong Zhang
  • Publication number: 20070148963
    Abstract: Methods of utilizing carbon nanotubes or composites thereof as hole plugs in vias or in contact holes for connecting conductive layers in integrated circuits are disclosed. Integrated circuits and integrated circuit layers formed by the methods are also disclosed.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 28, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Philip Chan, Min Zhang, Xiao Huo
  • Patent number: 7236219
    Abstract: The present invention relates to color liquid crystal displays without the use of color filters. By carefully choosing the design parameters of a liquid crystal display, it is possible to obtain vivid colors from the display as a function of the operating voltage.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: June 26, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Hoi-Sing Kwok, Xing-Jie Yu
  • Patent number: 7215187
    Abstract: A voltage mirror circuit using a symmetrically matched transistor structure is provided. The circuit includes an input reference voltage node on a first side of said circuit and an output mirror voltage node on a second side of said circuit, and a plurality of matched transistor pairs wherein the transistors in each pair have the same aspect ratio and wherein one transistor in each pair is provided on the first side of the circuit and the second transistor in each pair is provided on the second side of said circuit. The transistor pairs may include pairs of NMOS transistors and pairs of PMOS transistors or pairs of bipolar npn transistors and pairs of bipolar pnp transistors.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: May 8, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Yat Hei Lam, Wing Hung Ki, Chi Ying Tsui
  • Patent number: 7205827
    Abstract: A low-dropout regulator comprises a high-gain error amplifier having a differential input stage and a single-ended output, a high-swing high-positive-gain second stage with input connecting to the output of the error amplifier and a single-ended output, a p-type MOS transistor with gate terminal connecting to the output of the second stage, source terminal connecting to the supply voltage, and drain terminal to the output of the low-dropout regulator. A first-order high-pass feedback network connects the output of the low-dropout regulator and the positive input of the error amplifier, and a damping-factor-control means comprising a negative gain stage with a feedback capacitor connects the input and output of this gain stage. A capacitor is connected between the output of the error amplifier and the output of the low-dropout regulator, while a voltage reference connects to the negative input of the error amplifier.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: April 17, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Ka Nang Leung, Kwok Tai Mok
  • Patent number: 7199036
    Abstract: A series of improved processes and methods to manufacture solder bumps on the wafer which shrink the space among solder bumps and reduce the cost of manufacturing. A design method and a relevant manufacturing process are introduced to form an organic material or metal material layer, which is called a Bump-Reflow-Control Layer. The pad patterns can be defined by this method. A mechanical part is designed with a hermetic cover to improve the photoresist process. The series of photolithography process including the designing method of related photolithography mask is introduced to achieve the high quality and thick photoresist.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: April 3, 2007
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Chingho Philip Chan, Guowei David Xiao
  • Publication number: 20070018621
    Abstract: An area-efficient capacitor-free low-dropout regulator based on a current-feedback frequency compensation technique is disclosed. An implementation of a current feedback block with a single compensation capacitor is used to enable capacitance reduction. The resultant low-dropout regulator does not generally require an off-chip capacitor for stability and is particularly useful for system-on-chip applications.
    Type: Application
    Filed: July 13, 2006
    Publication date: January 25, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Kwok Tai Mok, Sai Lau, Ka Leung
  • Publication number: 20070020345
    Abstract: The present invention provides a preparation for treatment or prevention of a condition in a patient, said preparation comprising Schisandrin B. The concentration of Schisandrin B in the preparation may be between about 0.01 and about 0.1%, or it may be between about 20 and about 40% w/w or w/v. The preparation may additionally comprise one or more components selected from the group consisting of herbal extracts, fluids, solvents, antioxidants, preservatives, electrolytes, salts and pH control agents.
    Type: Application
    Filed: July 22, 2005
    Publication date: January 25, 2007
    Applicant: The Hong Kong University of Science and Technology
    Inventor: Kam Ko