Patents by Inventor Phoi Chin Goh

Phoi Chin Goh 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).

  • Method for preparing a lead-free piezoelectric thin film
    Patent number: 9450175
    Abstract: The present invention discloses a method of preparing a lead-free piezoelectric thin film comprising the steps of: providing a precursor solution comprising at least one alkali metal ion, a polyamino carboxylic acid, and an amine; depositing the precursor solution on a substrate to form a film; and annealing the film. The present invention also provides a lead-free piezoelectric thin film prepared according to the method, a precursor solution for use in the method and a method of preparing the precursor solution.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: September 20, 2016
    Assignee: Agency for Science, Technology and Research
    Inventors: Phoi Chin Goh, Kui Yao
  • METHOD FOR PREPARING A LEAD-FREE PIEZOELECTRIC THIN FILM
    Publication number: 20150132475
    Abstract: The present invention discloses a method of preparing a lead-free piezoelectric thin film comprising the steps of: providing a precursor solution comprising at least one alkali metal ion, a polyamino carboxylic acid, and an amine; depositing the precursor solution on a substrate to form a film; and annealing the film. The present invention also provides a lead-free piezoelectric thin film prepared according to the method, a precursor solution for use in the method and a method of preparing the precursor solution.
    Type: Application
    Filed: January 22, 2015
    Publication date: May 14, 2015
    Applicant: Agency for Science, Technology and Research
    Inventors: Phoi Chin GOH, Kui Yao
  • Method for preparing a lead-free piezoelectric thin film
    Patent number: 8961679
    Abstract: The present invention discloses a method of preparing a lead-free piezoelectric thin film comprising the steps of: providing a precursor solution comprising at least one alkali metal ion, a polyamine carboxylic acid, and an amine; depositing the precursor solution on a substrate to form a film; and annealing the film. The present invention also provides a lead-free piezoelectric thin film prepared according to the method, a precursor solution for use in the method and a method of preparing the precursor solution.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: February 24, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Phoi Chin Goh, Kui Yao
  • METHOD FOR PREPARING A LEAD-FREE PIEZOELECTRIC THIN FILM
    Publication number: 20130064970
    Abstract: The present invention discloses a method of preparing a lead-free piezoelectric thin film comprising the steps of: providing a precursor solution comprising at least one alkali metal ion, a polyamine carboxylic acid, and an amine; depositing the precursor solution on a substrate to form a film; and annealing the film. The present invention also provides a lead-free piezoelectric thin film prepared according to the method, a precursor solution for use in the method and a method of preparing the precursor solution.
    Type: Application
    Filed: May 20, 2011
    Publication date: March 14, 2013
    Inventors: Phoi Chin Goh, Kui Yao