Patents by Inventor Hua Ma

Hua 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).

  • Publication number: 20110303092
    Abstract: A method of making a membrane permeable to hydrogen gas (H2?) is disclosed. The membrane is made by forming a palladium layer, depositing a layer of copper on the palladium layer, and galvanically displacing a portion of the copper with palladium. The membrane has improved resistance to poisoning by H2S compared to a palladium membrane. The membrane also has increased permeance of hydrogen gas compared to palladium-copper alloys. The membrane can be annealed at a lower temperature for a shorter amount of time.
    Type: Application
    Filed: May 3, 2011
    Publication date: December 15, 2011
    Inventors: Yi Hua Ma, Natalie Pomerantz
  • Publication number: 20110286157
    Abstract: An electronic device includes a main body and a flexible display panel. The main body includes a body portion, a connecting portion, and a cover portion. The connecting portion is pivotally connected to the body portion. The cover portion is pivotally connected to the connecting portion so as to be capable of rotating relative to the body portion. The cover portion, the body portion, and the connecting portion form a containing space cooperatively. The flexible display panel is disposed in the containing space in a curved manner. The flexible display panel includes a first display section and a second display section. The first display section is fixed to the cover portion. The second display section is slidably disposed on the body portion.
    Type: Application
    Filed: August 19, 2010
    Publication date: November 24, 2011
    Inventor: Hsin-Hua Ma
  • Publication number: 20110279371
    Abstract: A mouse device is operable with a variable button-pressing force. The mouse device includes a mouse base, a mouse case, a button disposed on the mouse case, a pressing plate contacted with the button, and the sliding member contacted with the pressing plate. The sliding member is partially protruded out of the mouse base, and movable with respect to the mouse base. When the sliding member is moved to a first position and contacted with a first touching part of the pressing plate, the force required for pressing the button is equal to a first downward external force. Whereas, when the sliding member is moved to a second position and contacted with a second touching part of the pressing plate, the force required for pressing the button is equal to a second downward external force.
    Type: Application
    Filed: July 15, 2010
    Publication date: November 17, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventor: Qin-Hua Ma
  • Publication number: 20100328236
    Abstract: A method for controlling a computer system is disclosed. The computer system includes a touch device, a control module, a display device and an operation module. The touch device includes a main touch area without display function, wherein a touch point is moved for moving a cursor displayed in the display device. The main touch area includes a first partition and a second partition. The method includes the control module receiving an enable signal, a first touch point of the main touch area being touched, the touch device outputting a first touch signal to the control module, the control module deciding whether the first touch point is inside the first partition according to the first touch signal, and the control module notifying the operation module to perform a first program if the first touch point is inside the first partition.
    Type: Application
    Filed: January 10, 2010
    Publication date: December 30, 2010
    Inventor: Hsin-Hua Ma
  • Publication number: 20100170646
    Abstract: Wood pulp is treated with an esterase formulation in combination with a metal ion or cationic polymer to increase the stability or activity or both of esterase enzymes at high temperature, or at extreme pH ranges of acidic and alkaline conditions. The treatment by esterase together with metals ion or cationic polymer can be used to treat pitch containing pulp at high temperatures prior to, during or after refining of wood chip/pulp, in order to enhance the reduction of pitch problems and facilitate in the manufacture of paper.
    Type: Application
    Filed: January 6, 2009
    Publication date: July 8, 2010
    Inventors: Xiang H. Wang, Jian Hua Ma, Chengliang Jiang, Howard Kaplan
  • Publication number: 20100132546
    Abstract: Composite structures are described that have a porous anodic oxide layer such as, for example, a porous anodic aluminum oxide layer. In one aspect, the present invention includes a composite gas separation module having a porous metal substrate; a porous anodic aluminum oxide layer, wherein the porous anodic aluminum oxide layer overlies the porous metal substrate; and a dense gas-selective membrane, wherein the dense gas-selective membrane overlies the porous anodic aluminum oxide layer. A composite filter is described having a porous non-aluminum metal substrate; and a porous anodic aluminum oxide layer, wherein the porous anodic aluminum oxide layer defines pores extending through the porous anodic aluminum oxide layer. Methods for fabricating composite gas separation modules and composite filters and methods for selectively separating hydrogen gas from a hydrogen gas-containing gaseous stream are also described.
    Type: Application
    Filed: April 4, 2008
    Publication date: June 3, 2010
    Inventors: Yi Hua Ma, Ivan P. Mardilovich
  • Patent number: 7727596
    Abstract: A method for fabricating a composite gas separation module includes depositing a preactivated powder over a porous substrate; depositing a binder metal onto the preactivated powder; and depositing a dense gas-selective membrane to overlie the preactivated powder and binder metal, thereby forming the composite gas separation module. The preactivated powder can be, for example, selected from the group consisting of preactivated metal powders, preactivated metal oxide powders, preactivated ceramic powders, preactivated zeolite powders, and combinations thereof. The preactivated powder can be deposited, for example, from a slurry such as a water-based slurry. In some embodiments, the dense gas-selective membrane is a dense hydrogen-selective membrane.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: June 1, 2010
    Assignee: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Federico Guazzone
  • Patent number: 7536614
    Abstract: A method for testing memory in an integrated circuit device is disclosed. The method includes executing a test routine in a portion of the memory at a speed sufficient to fully test the memory cells, identifying faulty memory cells in the tested portion of the memory; writing an error map in another portion of the memory, the error map indicating the location of faulty memory cells found in the tested portion and, after executing the test routine and writing the error map, repairing at least some of the faulty memory cells using the error map. Once one portion of memory is tested, another portion is tested and a prior tested portion is used to write a new error map. Repairing, by analyzing the error map, is done at a slower speed than required for memory testing, allowing the use of a smaller logic section in the integrated circuit.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: May 19, 2009
    Assignee: Integrated Device Technology, Inc
    Inventors: Siyad Chih-Hua Ma, Chao-Wen Iseng
  • Patent number: 7390536
    Abstract: The present invention relates to a method for fabricating a composite gas separation module and to gas separation modules formed by the method. In one embodiment, the method for fabricating a composite gas separation module includes depositing a first material on a porous substrate, thereby forming a coated substrate. The coated substrate is abraded, thereby forming a polished substrate. A second material is then deposited on the polished substrate. The first material, the second material, or both the first material and the second material can include a gas-selective material such as a hydrogen-selective metal, e.g., palladium, or an alloy thereof. In one embodiment, the method includes the step of forming a dense gas-selective membrane over the porous substrate. The present invention also relates to a method for selectively separating hydrogen gas from a hydrogen gas-containing gaseous stream.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: June 24, 2008
    Assignee: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
  • Publication number: 20070298573
    Abstract: The invention is directed to a method for manufacturing a semiconductor device. The method comprises steps of forming a gate dielectric layer, a polysilicon layer and a patterned cap layer over a substrate sequentially and patterning the polysilicon layer to be a polysilicon gate by using the patterned cap layer as a mask. A plurality of lightly doped drain (LDD) regions are formed in the substrate aside the polysilicon gate, wherein a channel region is formed between the LDD regions in the substrate. A spacer is formed on the sidewall of the polysilicon gate and a source/drain region is formed in the substrate adjacent to the spacer. The patterned cap layer is removed and the spacer is removed. A metal silicidation process is performed for transforming the polysilicon gate into a metal silicide gate and forming a metal silicide layer at a surface of the source/drain region.
    Type: Application
    Filed: June 22, 2006
    Publication date: December 27, 2007
    Inventors: Chien-Ting Lin, Liang-Wei Chen, Che-Hua Hsu, Guan-Hua Ma
  • Patent number: 7255726
    Abstract: A composite gas separation module includes a porous metal substrate; an intermediate layer that includes a powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate and wherein the intermediate layer overlies the porous metal substrate; and a dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate layer. In another embodiment, a composite gas separation module includes a porous metal substrate; an intermediate powder layer; and a dense gas-selective membrane, wherein the dense gas-selective membrane overlies the intermediate powder layer.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: August 14, 2007
    Assignee: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
  • Patent number: 7228521
    Abstract: A code is generated for a programmable logic device (“PLD”) having a plurality of regions including at least one defective region. The code indicates a defective region or regions of the PLD. A user enters the code before running placement and routing. A guide file associated with the code blocks out the defective region(s) of the PLD during placement and routing.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: June 5, 2007
    Assignee: XILINX Inc.
    Inventors: Jing Hua Ma, Benhai Zhang
  • Patent number: 7175694
    Abstract: The present invention relates to a composite gas separation module and to methods for fabricating a composite gas separation module. The present invention also relates to methods for selectively separating hydrogen gas from a hydrogen gas-containing gaseous stream. In one embodiment, the composite gas separation module includes a porous metal substrate; an intermediate porous metal layer, wherein the intermediate porous metal layer overlies the porous metal substrate; and a dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate porous metal layer. The intermediate porous metal layer can include palladium and a Group IB metal. For example, the intermediate porous metal layer can contain alternating layers of palladium and a Group IB metal.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: February 13, 2007
    Assignee: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
  • Patent number: 7172644
    Abstract: The present invention relates to a method for curing a defect in the fabrication of a composite gas separation module and to composite gas separation modules formed by a process that includes the method. The present invention also relates to a method for selectively separating hydrogen gas from a hydrogen gas-containing gaseous stream. The method for curing a defect in the fabrication of a composite gas separation module includes depositing a first material over a porous substrate, thereby forming a coated substrate, wherein the coated substrate contains at least one defect. Then, the coated substrate can be selectively surface activated proximate to the defect, thereby forming at least one selectively surface activated region of the coated substrate. A second material can be then preferentially deposited on the selectively surface activated region of the coated substrate, whereby the defect is cured.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: February 6, 2007
    Assignee: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
  • Patent number: 6926920
    Abstract: A chemical vapor deposition (CVD) method for forming a microelectronic layer provides a source material dispensing nozzle employed within a chemical vapor deposition (CVD) apparatus which is employed within the chemical vapor deposition (CVD) method. The source material dispensing nozzle is calibrated to provide a calibrated source material dispensing nozzle. The calibrated source material dispensing nozzle is employed within the chemical vapor deposition (CVD) apparatus while employing the chemical vapor deposition (CVD) method for forming a chemical vapor deposition (CVD) deposited microelectronic layer upon the substrate positioned within the chemical vapor deposition (CVD) apparatus.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: August 9, 2005
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd
    Inventors: Shi Sheng Jang, Jian Hua Ma, Ko Chin Chung, Cheng Chung Wang
  • Patent number: 6907263
    Abstract: An antenna architecture permitting tri-band and quad-band transmission and reception of GSM standardized frequencies in a mobile unit with a required gain without increasing power consumption. The mobile unit utilizes a control circuit to unify a first antenna and a second antenna, wherein the first antenna can operate in a first frequency and a second frequency and the second antenna can operate in a third frequency and a forth frequency. The control circuit includes a phase shift circuit for each antenna. The phase shift circuits prevent each antenna from loading the other antenna effectively eliminating excessive VSWR to increase gain.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: June 14, 2005
    Assignee: High Tech Computer Corp.
    Inventors: Chien-Hsun Ho, Yih-Jang Chen, Kuo-Cheng Chen, Chien-Hua Ma
  • Publication number: 20040244583
    Abstract: The present invention relates to a method for curing a defect in the fabrication of a composite gas separation module and to composite gas separation modules formed by a process that includes the method. The present invention also relates to a method for selectively separating hydrogen gas from a hydrogen gas-containing gaseous stream.
    Type: Application
    Filed: March 19, 2004
    Publication date: December 9, 2004
    Applicant: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
  • Publication number: 20040246182
    Abstract: An antenna for wireless communication includes a radiator for receiving and transmitting radio frequency (RF) signals comprising a plurality of recesses formed on the sides of the radiator, a feeding plate stretching out from the radiator for transmitting the RF signals, and a ground plate stretching out from the radiator for grounding.
    Type: Application
    Filed: September 1, 2003
    Publication date: December 9, 2004
    Inventors: Kuo-Cheng Chen, Hui-Feng Lee, Chien-Hua Ma
  • Publication number: 20040244590
    Abstract: A composite gas separation module includes a porous metal substrate; an intermediate layer that includes a powder having a Tamman temperature higher than the Tamman temperature of the porous metal substrate and wherein the intermediate layer overlies the porous metal substrate; and a dense hydrogen-selective membrane, wherein the dense hydrogen-selective membrane overlies the intermediate layer. In another embodiment, a composite gas separation module includes a porous metal substrate; an intermediate powder layer; and a dense gas-selective membrane, wherein the dense gas-selective membrane overlies the intermediate powder layer.
    Type: Application
    Filed: April 30, 2004
    Publication date: December 9, 2004
    Applicant: Worcester Polytechnic Institute
    Inventors: Yi Hua Ma, Ivan P. Mardilovich, Erik E. Engwall
  • Patent number: 6828895
    Abstract: A disconnector assembly is provided for an arrester. A non-conductive housing has first and second opposite ends separated by an internal chamber. A first electrical terminal is connected at the first end. A second electrical terminal is connected at the second end. A capacitor assembly engages and extends between the first and second terminals in the internal chamber. The capacitor assembly includes a capacitor and a resistor electrically connected in series. A sparkgap is electrically parallel the capacitor assembly between the first and second terminals. A cartridge with an explosive charge is positioned in the internal chamber, and the cartridge is electrically parallel to the capacitor assembly and electrically in series with the spark gap.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: December 7, 2004
    Assignee: Hubbel Incorporated
    Inventors: Xingniu Huo, Dennis W. Lenk, John A. Krause, Craig S. Hunsicker, Zhuo-hua Ma, Hong-sheng Guo