Patents by Inventor Haidong Liu

Haidong Liu 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: 20120255357
    Abstract: A sensor package has integrated magnetic and acceleration sensor package structures, where a first wafer is bonded to a second wafer with a cavity defined between them. The magnetic sensor is bonded to the bottom of the first wafer and the acceleration sensor is provided within the cavity. Circuitry to drive the accelerometer and interface with the magnetic sensor is provided on the first wafer.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 11, 2012
    Inventors: Dongmin Chen, Haidong Liu, Zhiwei Duan
  • Patent number: 8139030
    Abstract: The use of magnetic field sensing to perform sophisticated command control and data input into a portable device is disclosed. A magnetic field sensor is embedded or fixedly attached to a portable device to measure changes in the magnetic field strength and/or direction accompanying movement, motion or tilt of the device in one-, two- or three-dimensions when the portable device is used to air-write or make gestures.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: March 20, 2012
    Assignee: Memsic, Inc.
    Inventors: Yang Zhao, Pan Guozhi, Yu Jianping, Haidong Liu
  • Publication number: 20120048019
    Abstract: Micro-machined capacitive sensors implemented in micro-electro-mechanical system (MEMS) processes that have higher sensitivity, while providing an increased linear capacitive sensing range. Capacitive sensing is achieved via variable-area sensing, which employs a transduction mechanism in which the relationship between changes in the capacitance of variable, parallel-plate capacitors and displacements of a proof mass is generally linear. Each respective variable, parallel-plate capacitor is formed by a finger/electrode pair, in which both the finger and the electrode have rectangular tooth profiles that include a plurality of rectangular teeth.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 1, 2012
    Inventors: Hanqin Zhou, Leyue Jiang, Mathew Varghese, Haidong Liu
  • Publication number: 20110227569
    Abstract: A magnetometer with only a SET operation for initiating a magnetic orientation within a magnetic field sensor based on anisotropic magnetoresistive (AMR) technology. Within the magnetometer, the relative orientations of the respective X, Y and Z axes detectors are maintained by a package in which all detectors are mounted on a single assembly with the Z axis sensor displaced and held orthogonal to the other two sensors by potting material. Shorting bars on respective barber pole structures are provided with a geometry that allows for closer placement of adjacent barber poles to one another. The barber pole structures are deposited in a nested orientation which provides for balanced resistance legs in a Wheatstone bridge construction.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 22, 2011
    Inventors: Yongyao Cai, Jerome S. Marcelino, Yang Zhao, Mark Laich, Haidong Liu, Zongya Li
  • Publication number: 20100266386
    Abstract: A turbine nozzle includes outer and inner bands bounding nozzle vanes. The outer band includes an aft flange. An impingement baffle bridges the outer band and aft flange at the root thereof to provide impingement cooling.
    Type: Application
    Filed: April 21, 2009
    Publication date: October 21, 2010
    Inventors: Mark Broomer, Robert Francis Manning, Haidong Liu
  • Publication number: 20100161084
    Abstract: The use of magnetic field sensing to perform sophisticated command control and data input into a portable device is disclosed. A magnetic field sensor is embedded or fixedly attached to a portable device to measure changes in the magnetic field strength and/or direction accompanying movement, motion or tilt of the device in one-, two- or three-dimensions when the portable device is used to air-write or make gestures.
    Type: Application
    Filed: February 12, 2010
    Publication date: June 24, 2010
    Inventors: Yang Zhao, Pan Guozhi, Yu Jianping, Haidong Liu
  • Patent number: 7461535
    Abstract: A system and method for testing and calibrating integrated sensor devices that improves the manufacturing test throughput of the devices. The system includes a tester, a temperature controller, and at least one probe station including a thermal chuck. The chuck can be heated to specified temperatures to achieve variable heating of a wafer, PCB, or pallet disposed thereon. The temperature controller adjusts the temperature of the chuck to a first specified level. The tester performs at least one first measurement of the output offset of each integrated sensor embodied as a die on the wafer, or as a device on the PCB or pallet. Next, the temperature controller adjusts the temperature of the chuck to a second specified level, and the tester performs at least one second measurement of the output offset of each integrated sensor at the second temperature level.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: December 9, 2008
    Assignee: MEMSIC, Inc.
    Inventors: Feiming Huang, Haidong Liu
  • Publication number: 20070204672
    Abstract: A system and method for testing and calibrating integrated sensor devices that improves the manufacturing test throughput of the devices. The system includes a tester, a temperature controller, and at least one probe station including a thermal chuck. The chuck can be heated to specified temperatures to achieve variable heating of a wafer, PCB, or pallet disposed thereon. The temperature controller adjusts the temperature of the chuck to a first specified level. The tester performs at least one first measurement of the output offset of each integrated sensor embodied as a die on the wafer, or as a device on the PCB or pallet. Next, the temperature controller adjusts the temperature of the chuck to a second specified level, and the tester performs at least one second measurement of the output offset of each integrated sensor at the second temperature level.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 6, 2007
    Inventors: Feiming Huang, Haidong Liu