Patents by Inventor Tong Zhao

Tong Zhao 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: 20060073129
    Abstract: A composition and method for the inhibition of microorganisms.
    Type: Application
    Filed: November 24, 2003
    Publication date: April 6, 2006
    Inventors: Michael Doyle, Tong Zhao
  • Publication number: 20060061915
    Abstract: A GMR spin value structure with improved performance and a method for making the same is disclosed. A key feature is the incorporation of a thin ferromagnetic insertion layer such as a 5 Angstrom thick CoFe layer between a NiCr seed layer and an IrMn AFM layer. Lowering the Ar flow rate to 10 sccm for the NiCr sputter deposition and raising the Ar flow rate to 100 sccm for the IrMn deposition enables the seed layer to be thinned to 25 Angstroms and the AFM layer to about 40 Angstroms. As a result, HEX between the AFM and pinned layers increases by up to 200 Oe while the Tb is maintained at or above 250° C. When the seed/CoFe/AFM configuration is used in a read head sensor, a higher GMR ratio is observed in addition to smaller free layer coercivity (HCF), interlayer coupling (HE), and HK values.
    Type: Application
    Filed: September 23, 2004
    Publication date: March 23, 2006
    Inventors: Kunliang Zhang, Hui-Chuan Wang, Tong Zhao, Min Li, Chyu-Jiuh Torng
  • Publication number: 20050252576
    Abstract: In a conventional spin valve the shunt resistance of the pinning layer reduces the overall efficiency of the device. This problem has been overcome by using IrMn for the pinning layer at a thickness of about 20 Angstroms or less. For the IrMn to be fully effective it must be subjected to a two-step anneal, first in the presence of a high field (about 10 kOe) for several hours and then in a low field (about 500 Oe) while it cools. The result, in addition to improved pinning, is the ability to do testing at the full film and full wafer levels.
    Type: Application
    Filed: May 14, 2004
    Publication date: November 17, 2005
    Inventors: Yun-Fei Li, Hui-Chuan Wang, Tong Zhao, Chyu-Jiuh Torng
  • Patent number: 6870711
    Abstract: A pinned/pinning layer configuration of the form: AP1/coupling bilayer/AP2/AFM, suitable for use in a CIP or CPP GMR sensor, a TMR sensor or an MRAM element, is found to have improved magnetic stability, yield good values of dR/R and have high values of saturation magnetization that can be adjusted to meet the requirements of magnetic field annealing. The coupling bilayer is a layer of Ru/Rh or their alloys, which provides a wide range of coupling strengths by varying either the thickness of the Ru layer or the Rh layer.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: March 22, 2005
    Assignee: Headway Technologies, Inc.
    Inventors: Tong Zhao, Hui-Chuan Wang, Yun-Fei Li, Chyu-Jiuh Torng
  • Publication number: 20050002126
    Abstract: A CPP spin-valve element formed on a substrate including a free layer structure including at least one ferromagnetic layer and a pinned layer structure including at least one ferromagnetic layer. The free layer is magnetically softer than the pinned layer. A thin non-magnetic spacer layer structure configured to separate the free layer and the pinned layer is provided in order to prevent a magnetic coupling between the free and pinned layer structures, and to allow an electric current to go there through. At least two current-confining (CC) layer structures including at least two parts having significantly different current conductivities are incorporated therein.
    Type: Application
    Filed: July 3, 2003
    Publication date: January 6, 2005
    Applicants: THE UNIVERSITY OF ALABAMA, FUJITSU LIMITED
    Inventors: Hideo Fujiwara, Keiichi Nagasaka, Tong Zhao, William Bulter, Julian Velev, Amrit Bandyopadhyay
  • Publication number: 20030202493
    Abstract: A method of determining a time slot timing based upon an input sequence r(n) is disclosed. The method comprises using a frequency correction channel detector to determine a first time slot end time based upon the input sequence r(n). Then, the frequency correction channel detector is used to determine a second time slot end time based upon an order reversed input sequence r(n). A time slot midpoint is calculated as the average of the first time slot end time and second time slot end time. The time slot midpoint is then used to estimate the time slot timing.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Inventors: Jingdong Lin, Tong Zhao
  • Publication number: 20030189978
    Abstract: A method of detecting a tone signal from complex input samples r(n) in a wireless communication system is disclosed. The method comprises calculating the phase difference of the samples r(n) as a signal x(n). Next, the signal x(n) is filtered with a notch filter to generate a notched output y(n). The power of both the signal x(n) and the notched output y(n) is estimated. The ratio of the powers of the notched output y(n) and signal x(n) is calculated. The tone signal is detected if the ratio is below a predetermined threshold for a predetermined duration of time.
    Type: Application
    Filed: April 9, 2002
    Publication date: October 9, 2003
    Inventors: Jingdong Lin, Justine Zhuang, Tong Zhao
  • Publication number: 20030087014
    Abstract: A method for increasing the rate of thermal inactivation of a pathogen in a nutriment by contacting the nutriment with an acidulant. A method for extending case shelf-life of a nutriment by contacting the nutriment with an acidulant. The acidulant can be: (a) an acidic, or low pH, solution of sparingly-soluble Group IIA complexes (“AGIIS”); (b) a highly acidic metalated mixture of inorganic acid (“HAMMIA”); (c) a highly acidic metalated organic acid (“HAMO”); (d) a mixture of the above; or (e) an adduct of each of the above. The nutriment can be an animal product, a plant product, a beverage, or a mixture thereof.
    Type: Application
    Filed: July 30, 2001
    Publication date: May 8, 2003
    Applicant: Mionix Corp.
    Inventors: Maurice Clarence Kemp, Robert H. Carpenter, Michael Patrick Doyle, Robert Blaine Lalum, Zhong Wei Xie, Yao Yu, Tong Zhao
  • Patent number: 6330234
    Abstract: A method and apparatus reduces current consumption of a mobile communication unit, such as a cellular or mobile telephone that communicates with a base station by disabling a temperature controlled crystal oscillator and a code generator while the mobile communication unit is in a sleep mode of operation, thereby reducing the sleep mode current consumed by the mobile communication unit. Prior to entering sleep mode, the mobile communications unit stores the state of the code generator and disables the temperature controlled crystal oscillator. Upon waking from sleep mode, the mobile communication unit calculates what the state of its code generator would have been if its temperature controlled crystal oscillator had not been disabled, and uses this calculated state to achieve synchronization with a code generator in the base station.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: December 11, 2001
    Inventors: Peter A. Tomasi, Tong Zhao, Lindo St. Angel, Michael J. Schellinger, Dien N. Nguyen, Wayne H. Bradley
  • Patent number: 5965128
    Abstract: The prevention and treatment of carriage of E. coli O157:H7 by a ruminant animal is accomplished by administering dominant probiotic bacteria to the animal. The dominant probiotic bacteria prevent the establishment of E. coli O157:H7 when inoculated prior to administering E. coli O157:H7, are reisolatable from the gastrointestinal tract of inoculated animals for up to 28 days post-inoculation, and are capable of reducing or eliminating E. coli O157:H7 from animals previously inoculated with the pathogen. In particular, the dominant probiotic bacteria are strains E. coli 271 ATCC 202020, E. coli 786 ATCC 202018 and E. coli 797 ATCC 202019.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: October 12, 1999
    Assignee: University of Georgia Research Foundation Inc.
    Inventors: Michael P. Doyle, Tong Zhao, Barry G. Harmon, Cathy Ann Brown