Patents by Inventor Chia-Ching Wan

Chia-Ching Wan 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: 7018856
    Abstract: A multi-point calibration standards and a method of fabricating calibration standards which are used to quantify the dose or concentration of a dopant or impurity in a silicon matrix. The calibration standards include a set of calibration standard wafers for each dopant or impurity to be quantified. On each calibration standard wafer in the set is provided a silicon matrix incorporated with one of various concentrations, by weight, of the dopant or impurity in the silicon. The atomic concentration of the dopant or impurity in the silicon on each wafer in the set is measured. A calibration curve is then prepared in which the silicon/dopant or silicon/impurity ratio on each calibration standard wafer in the set is plotted versus the atomic concentration of the dopant or impurity in the silicon on the wafer.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: March 28, 2006
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd
    Inventors: Chia-Ching Wan, Min-Ta Yu
  • Publication number: 20050170535
    Abstract: A multi-point calibration standards and a method of fabricating calibration standards which are used to quantify the dose or concentration of a dopant or impurity in a silicon matrix. The calibration standards include a set of calibration standard wafers for each dopant or impurity to be quantified. On each calibration standard wafer in the set is provided a silicon matrix incorporated with one of various concentrations, by weight, of the dopant or impurity in the silicon. The atomic concentration of the dopant or impurity in the silicon on each wafer in the set is measured. A calibration curve is then prepared in which the silicon/dopant or silicon/impurity ratio on each calibration standard wafer in the set is plotted versus the atomic concentration of the dopant or impurity in the silicon on the wafer.
    Type: Application
    Filed: January 29, 2004
    Publication date: August 4, 2005
    Inventors: Chia-Ching Wan, Min-Ta Yu