Patents by Inventor K. T. Chang

K. T. Chang 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: 20110278660
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line openings containing a bit line dielectric between the memory cells. The memory cell contains a charge storage layer and a first poly gate. The bit line opening extends into the semiconductor substrate. By containing the bit line dielectric in the bit line openings that extend into the semiconductor substrate, the memory device can improve the electrical isolation between memory cells, thereby preventing and/or mitigating TPD.
    Type: Application
    Filed: July 26, 2011
    Publication date: November 17, 2011
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, K.T. Chang, Hiro Kinoshita, Chih-Yuh Yang, Lei Xue, Chungho Lee, Minghao Shen, Angela Hui, Huaqiang Wu
  • Publication number: 20100264480
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line dielectrics between the memory cells. The bit line dielectrics can extend into the semiconductor. The memory cell contains one or more charge storage nodes, a first poly gate, a pair of first bit lines, and a pair of second bit lines. The second bit line can be formed at a higher energy level, a higher concentration of dopants, or a combination thereof compared to an energy level and a concentration of dopants of the first bit line.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, Calvin Gabriel, Angela Hui, Lei Xue, Harpreet Kaur Sachar, Phillip Lawrence Jones, Hiro Kinoshita, K.T Chang, Huaqiang Wu
  • Publication number: 20090042378
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line dielectrics between the memory cells. The bit line dielectrics can extend into the semiconductor. The memory cell contains one or more charge storage nodes, a first poly gate, a pair of first bit lines, and a pair of second bit lines. The second bit line can be formed at a higher energy level, a higher concentration of dopants, or a combination thereof compared to an energy level and a concentration of dopants of the first bit line.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, Calvin Gabriel, Angela Hui, Lei Xue, Harpreet Kaur Sachar, Phillip Lawrence Jones, Hiro Kinoshita, K.T. Chang, Huaqiang Wu
  • Publication number: 20090039405
    Abstract: Memory devices having improved TPD characteristics and methods of making the memory devices are provided. The memory devices contain two or more memory cells on a semiconductor substrate and bit line openings containing a bit line dielectric between the memory cells. The memory cell contains a charge storage layer and a first poly gate. The bit line opening extends into the semiconductor substrate. By containing the bit line dielectric in the bit line openings that extend into the semiconductor substrate, the memory device can improve the electrical isolation between memory cells, thereby preventing and/or mitigating TPD.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 12, 2009
    Applicant: SPANSION LLC
    Inventors: Ning Cheng, K.T. Chang, Hiro Kinoshita, Chih-Yuh Yang, Lei Xue, Chungho Lee, Minghao Shen, Angela Hui, Huaqiang Wu
  • Patent number: 5109062
    Abstract: A Mannich emulsion containing a stabilizing amount of a guanidine salt has been found to exhibit substantially increased long term stability, even at elevated temperature.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: April 28, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, K. T. Chang, Nguyen Van-Det