Patents by Inventor Wenhua Zhang

Wenhua Zhang 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).

  • Patent number: 9075079
    Abstract: An integrated MEMS inertial sensor device. The device includes a MEMS inertial sensor overlying a CMOS substrate. The MEMS inertial sensor includes a drive frame coupled to the surface region via at least one drive spring, a sense mass coupled to the drive frame via at least a sense spring, and a sense electrode disposed underlying the sense mass. The device also includes at least one pair of quadrature cancellation electrodes disposed within a vicinity of the sense electrode, wherein each pair includes an N-electrode and a P-electrode.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: July 7, 2015
    Assignee: MCUBE INC.
    Inventors: Shingo Yoneoka, Sudheer Sridharamurthy, Wenhua Zhang, Te-Hsi Terrence Lee
  • Publication number: 20150090034
    Abstract: A gyroscope device and method of operation therefor. The gyroscope device can include a power input, a charge pump portion coupled to the power input, a selection mechanism, a switching mechanism, an oscillator driving mechanism coupled to the switching mechanism, and an oscillator coupled to the charge pump portion and to the oscillator driving mechanism. The method of operation can include providing a first or second selection signal from a selection mechanism associated with the outputting of a DC input power or DC output power from a switching mechanism, respectively. These signals, along with an oscillator driving signal from an oscillator driving mechanism, can be used to initiate and maintain oscillation of an oscillator at a steady-state frequency within a predetermined range of frequencies.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 2, 2015
    Inventor: WENHUA ZHANG
  • Publication number: 20140370638
    Abstract: A method for fabricating an integrated MEMS-CMOS device. The method can include providing a substrate member having a surface region and forming a CMOS IC layer having at least one CMOS device overlying the surface region. A bottom isolation layer can be formed overlying the CMOS IC layer and a shielding layer and a top isolation layer can be formed overlying a portion of bottom isolation layer. The bottom isolation layer can include an isolation region between the top isolation layer and the shielding layer. A MEMS layer overlying the top isolation layer, the shielding layer, and the bottom isolation layer, and can be etched to form at least one MEMS structure having at least one movable structure and at least one anchored structure.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 18, 2014
    Inventors: TE-HSI "TERRENCE" LEE, Sudheer S. Sridharamurthy, Shingo Yoneoka, Wenhua Zhang
  • Publication number: 20140361348
    Abstract: An integrated MEMS inertial sensor device. The device includes a MEMS inertial sensor overlying a CMOS substrate. The MEMS inertial sensor includes a drive frame coupled to the surface region via at least one drive spring, a sense mass coupled to the drive frame via at least a sense spring, and a sense electrode disposed underlying the sense mass. The device also includes at least one pair of quadrature cancellation electrodes disposed within a vicinity of the sense electrode, wherein each pair includes an N-electrode and a P-electrode.
    Type: Application
    Filed: June 5, 2014
    Publication date: December 11, 2014
    Inventors: SHINGO YONEOKA, Sudheer Sridharamurthy, Wenhua Zhang, Te-Hsi Terrence Yoneoka
  • Publication number: 20140311242
    Abstract: A multi-axis integrated MEMS inertial sensor device. The device can include an integrated 3-axis gyroscope and 3-axis accelerometer on a single chip, creating a 6-axis inertial sensor device. The structure is spatially with efficient use of the design area of the chip by adding the accelerometer device to the center of the gyroscope device. The design architecture can be a rectangular or square shape in geometry, which makes use of the whole chip area and maximizes the sensor size in a defined area. The MEMS is centered in the package, which is beneficial to the sensor's temperature performance. Furthermore, the electrical bonding pads of the integrated multi-axis inertial sensor device can be configured in the four corners of the rectangular chip layout. This configuration guarantees design symmetry and efficient use of the chip area.
    Type: Application
    Filed: January 23, 2014
    Publication date: October 23, 2014
    Applicant: mCube Inc.
    Inventors: TERRENCE LEE, WENHUA ZHANG, SUDHEER SRIDHARAMURTHY, SHINGO YONEOKA
  • Publication number: 20140311247
    Abstract: A MEMS rate sensor device. In an embodiment, the sensor device includes a MEMS rate sensor configured overlying a CMOS substrate. The MEMS rate sensor can include a driver set, with four driver elements, and a sensor set, with six sensing elements, configured for 3-axis rotational sensing. This sensor architecture allows low damping in driving masses and high damping in sensing masses, which is ideal for a MEMS rate sensor design. Low driver damping is beneficial to MEMS rate power consumption and performance, with low driving electrical potential to achieve high oscillation amplitude.
    Type: Application
    Filed: January 24, 2014
    Publication date: October 23, 2014
    Applicant: mCube Inc.
    Inventors: WENHUA ZHANG, Sudheer Sridharamurthy, Shingo Yoneoka, Terrence Lee
  • Publication number: 20140227816
    Abstract: A method for fabricating a multiple MEMS device. A semiconductor substrate having a first and second MEMS device, and an encapsulation wafer with a first cavity and a second cavity, which includes at least one channel, can be provided. The first MEMS can be encapsulated within the first cavity and the second MEMS device can be encapsulated within the second cavity. These devices can be encapsulated within a provided first encapsulation environment at a first air pressure, encapsulating the first MEMS device within the first cavity at the first air pressure. The second MEMS device within the second cavity can then be subjected to a provided second encapsulating environment at a second air pressure via the channel of the second cavity.
    Type: Application
    Filed: December 10, 2013
    Publication date: August 14, 2014
    Applicant: mCube Inc.
    Inventors: WENHUA ZHANG, Shingo Yoneoka
  • Patent number: 8733171
    Abstract: Gyroscopes that can compensate frequency mismatch are provided. In this regard, a representative gyroscope, among others, includes a top substrate including an outermost structure, a first driving structure and a first sensing structure. The first driving structure and the first sensing structure are disposed within the outermost structure. The first driving structure and the first sensing structure include a first driving electrode and a first sensing electrode that are disposed on a bottom surface of the first driving structure and first sensing structure, respectively. A portion of the mass on the top surface of the first sensing structure is removed. The gyroscope further includes a bottom substrate that is disposed below the top substrate. The bottom substrate includes a second driving electrode and a second sensing electrode that are disposed on a top surface of the bottom substrate and below the first driving electrode and the first sensing electrode.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: May 27, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley
  • Patent number: 8446661
    Abstract: A resonant cavity with tunable nanowire. The resonant cavity includes a substrate. The substrate is coupleable to an optical resonator structure. The resonant cavity also includes a plurality of nanowires formed on the substrate. The plurality of nanowires is actuated in response to an application of energy.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: May 21, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sagi Varghese Mathai, Alexandre M. Bratkovski, Wenhua Zhang, Shih-Yuan Wang
  • Patent number: 8272266
    Abstract: Gyroscopes using surface electrodes are provided. In this regard, a representative microelectromechanical systems (MEMS) gyroscope, among others, includes a top substrate and a bottom substrate. The top substrate includes an outermost structure that is open and enclosed and a first driving structure that is disposed within the outermost structure and includes first driving electrodes disposed on a bottom surface. The bottom substrate is disposed below the top substrate and includes second driving electrodes disposed on a top surface of the bottom substrate. The second driving electrodes are substantially aligned below the first driving electrodes such that a force can be applied to the first driving structure by an electrostatic force generated between the first and second driving electrodes. The first and second driving electrodes are also configured to provide a capacitance signal based on the movement of the first driving structure.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: September 25, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Peter George Hartwell, Lennie K Kiyama, Robert G Walmsley
  • Patent number: 8049579
    Abstract: A resonator includes a translator, a stator, and a control circuit. The control circuit is configured to provide first and second translator voltages and first through third stator voltages, wherein the translator is configured to move with respect to the stator at a resonant frequency of the resonator in response to the control circuit.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: November 1, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert G. Walmsley, Wenhua Zhang, Lennie K Kiyama, Peter Hartwell
  • Publication number: 20110179866
    Abstract: Gyroscopes that can compensate frequency mismatch are provided. In this regard, a representative gyroscope, among others, includes a top substrate including an outermost structure, a first driving structure and a first sensing structure. The first driving structure and the first sensing structure are disposed within the outermost structure. The first driving structure and the first sensing structure include a first driving electrode and a first sensing electrode that are disposed on a bottom surface of the first driving structure and first sensing structure, respectively. A portion of the mass on the top surface of the first sensing structure is removed. The gyroscope further includes a bottom substrate that is disposed below the top substrate. The bottom substrate includes a second driving electrode and a second sensing electrode that are disposed on a top surface of the bottom substrate and below the first driving electrode and the first sensing electrode.
    Type: Application
    Filed: October 31, 2008
    Publication date: July 28, 2011
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley
  • Patent number: 7966880
    Abstract: Encapsulated devices that can adjust the damping level within are provided. In this regard, a representative encapsulated device, among others, comprises a bottom substrate, a middle substrate that is disposed above the bottom substrate, and a top substrate that is disposed above the middle substrate. The middle substrate comprises an outermost structure and at least one damping device. The at least one damping device is supported to the outermost structure. At least one top gap and a bottom gap are formed between the at least one damping device and the top and bottom substrates, respectively. The at least one top gap has at least one cavity depth that is adapted to adjust the damping level of the encapsulated device.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: June 28, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley, Peter George Hartwell
  • Publication number: 20110141546
    Abstract: A resonant cavity with tunable nanowire. The resonant cavity includes a substrate. The substrate is coupleable to an optical resonator structure. The resonant cavity also includes a plurality of nanowires formed on the substrate. The plurality of nanowires is actuated in response to an application of energy.
    Type: Application
    Filed: August 26, 2008
    Publication date: June 16, 2011
    Inventors: Sagi Varghese Mathai, Alexandre M. Bratkovski, Wenhua Zhang, Shih-Yuan Wang
  • Publication number: 20100257934
    Abstract: Gyroscopes using surface electrodes are provided. In this regard, a representative microelectromechanical systems (MEMS) gyroscope, among others, includes a top substrate and a bottom substrate. The top substrate includes an outermost structure that is open and enclosed and a first driving structure that is disposed within the outermost structure and includes first driving electrodes disposed on a bottom surface. The bottom substrate is disposed below the top substrate and includes second driving electrodes disposed on a top surface of the bottom substrate. The second driving electrodes are substantially aligned below the first driving electrodes such that a force can be applied to the first driving structure by an electrostatic force generated between the first and second driving electrodes. The first and second driving electrodes are also configured to provide a capacitance signal based on the movement of the first driving structure.
    Type: Application
    Filed: April 9, 2009
    Publication date: October 14, 2010
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Peter George Hartwell, Lennie K. Kiyama, Robert G. Walmsley
  • Publication number: 20100109579
    Abstract: A resonator includes a translator, a stator, and a control circuit. The control circuit is configured to provide first and second translator voltages and first through third stator voltages, wherein the translator is configured to move with respect to the stator at a resonant frequency of the resonator in response to the control circuit.
    Type: Application
    Filed: October 30, 2008
    Publication date: May 6, 2010
    Inventors: Robert G. Walmsley, Wenhua Zhang, Lennie K. Kiyama, Peter Hartwell
  • Publication number: 20100089153
    Abstract: Encapsulated devices that can adjust the damping level within are provided. In this regard, a representative encapsulated device, among others, comprises a bottom substrate, a middle substrate that is disposed above the bottom substrate, and a top substrate that is disposed above the middle substrate. The middle substrate comprises an outermost structure and at least one damping device. The at least one damping device is supported to the outermost structure. At least one top gap and a bottom gap are formed between the at least one damping device and the top and bottom substrates, respectively. The at least one top gap has at least one cavity depth that is adapted to adjust the damping level of the encapsulated device.
    Type: Application
    Filed: October 13, 2008
    Publication date: April 15, 2010
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley, Peter George Hartwell
  • Patent number: 7681799
    Abstract: A method of reading code symbols using a digital image capture and processing system which includes: an image formation and detection subsystem; an illumination subsystem; an illumination control subsystem; a digital image processing subsystem; and an input/output subsystem; and a system control subsystem. In the illustrative embodiment, a micro-computing platform implements the digital image processing subsystem, the input/output subsystem and the system control subsystem. The micro-computing platform includes a microprocessor, a memory architecture, and a multi-tier modular software architecture responsive to the generation of a triggering event within the system. Triggering events can be generated by an automatic object detector or by a manually actuated trigger switch.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: March 23, 2010
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7637433
    Abstract: A digital image capture and processing system comprising an illumination measurement subsystem for measuring the level of illumination at a particular region of the field of view (FOV) of the system during object illumination and imaging operations, and producing and storing an illumination measure for achieving a desired spatial intensity in a digital image to be formed and detected by the image formation and detection subsystem. An illumination control subsystem uses the illumination measure to control a LED-based illumination array during object illumination and imaging operations. A programmed image processor supports an image-processing based illumination metering program, as well as processes digital images formed and detected by the image formation and detection subsystem so as to read or acquire information graphically represented in the digital images.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: December 29, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7624926
    Abstract: A hand-supportable digital-imaging based system for reading bar code symbols involving: automatically detecting the presence of an object within a field of view FOV of the system, and in response thereto, automatically generating an image cropping zone (ICZ) framing pattern and projecting the ICZ framing pattern within the FOV and onto the detected object; visually aligning the code symbol on the detected object, within the ICZ framing pattern; manually actuating a trigger switch when the code symbol on the object is located within the ICZ framing pattern, and while the ICZ framing pattern and a field of illumination are being simultaneously projected onto the object during object illumination operations, forming and capturing a digital image of the code symbol on the detected object; automatically cropping the image pixels contained within the spatial boundaries of the ICZ framing pattern, from the pixels of the digital image; and decode processing the cropped image so as to read one or more 1D and/or 2D cod
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: December 1, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky