Patents by Inventor Zhengkai Yang

Zhengkai Yang 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: 10409170
    Abstract: The present invention discloses a method for quickly establishing lithography process condition by a pre-compensation value, comprising: firstly determining a reference process condition of masks of which parameters are same, and then determining an optimum process condition of the first mask; thereafter, calculating a ratio of the optimum process condition of the first mask deviating from the reference process condition, wherein if the ratio is equal to or larger than a set threshold, the first mask is inspected, and if the ratio is less than the set threshold, an optimum process condition of the second mask is determined according to the ratio and the reference process condition of the second mask; and by analogy, determining optimum process conditions of the rest masks. The method of the present invention can quickly establish a lithograph process condition, reduce the trial production time for determining the optimum defocus amount and exposure amount.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 10, 2019
    Assignee: SHANGHAI HUALI MICROELECTRONICS CORPORATION
    Inventors: Qiaoli Chen, Zhengkai Yang
  • Publication number: 20180307143
    Abstract: The present invention discloses a method for quickly establishing lithography process condition by a pre-compensation value, comprising: firstly determining a reference process condition of masks of which parameters are same, and then determining an optimum process condition of the first mask; thereafter, calculating a ratio of the optimum process condition of the first mask deviating from the reference process condition, wherein if the ratio is equal to or larger than a set threshold, the first mask is inspected, and if the ratio is less than the set threshold, an optimum process condition of the second mask is determined according to the ratio and the reference process condition of the second mask; and by analogy, determining optimum process conditions of the rest masks. The method of the present invention can quickly establish a lithograph process condition, reduce the trial production time for determining the optimum defocus amount and exposure amount.
    Type: Application
    Filed: October 31, 2017
    Publication date: October 25, 2018
    Inventors: Qiaoli Chen, Zhengkai Yang