Patents by Inventor Hung-Hsiu Yu

Hung-Hsiu Yu 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: 20070265740
    Abstract: An obstacle and cliff avoiding system is disclosed, which is substantially a movable chassis having at least a displacement sensor arranged thereon. In a preferred embodiment, each displacement sensor is tilted by a specific angle with respect to a surface detected thereby while being driven to move in circle by a rotating apparatus for enabling the same to scan a defined fan-like area or the circular area around the chassis in a circulating manner. As each displacement sensor is tilted by the specific angle and is initiated to issue a working signal, the paths of signal emission and reception of each sensor are defined by the specific angle, whereas the reflected working signal received by the sensor is sent to a control unit to be compared with the working signal so that the control unit is able to evaluate whether there is an obstacle or a drop in front of the moving direction of the movable chassis and thus control the chassis to maneuver around the obstacle or the drop.
    Type: Application
    Filed: September 8, 2006
    Publication date: November 15, 2007
    Inventors: Hung-Hsiu Yu, Kuo-Shih Tseng, Yu-Lun Ho, Mao-Feng Tu, Chun-Hung Liu
  • Patent number: 6518775
    Abstract: The present invention provides a process for determining the spacing between a heater and a showerhead. First, at least one variable capacitor is placed between the heater and the showerhead, such that the spacing between the heater and the showerhead is in a predetermined relationship to the capacitance of the variable capacitor. Then, the capacitance of the variable capacitor is measured, and the spacing between the heater and the showerhead is converted from the capacitance. The determination process of the present invention can be conducted at high temperature above 350° C., and the spacing can be determined without opening the deposition chamber. This makes the entire process very convenient and the cost can be saved.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: February 11, 2003
    Assignee: ProMos Technologies Inc.
    Inventors: Hung-Hsiu Yu, Alex Wu, Ming Chih Sung