Patents by Inventor Cho Jui Tay

Cho Jui Tay 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: 8450046
    Abstract: A method for fabricating a semiconductor device that includes: providing a substrate prepared with a photoresist layer; providing a photomask comprising a first and a second pattern having a respective first and second pitch range; providing a composite aperture comprising a first and a second off-axis illumination aperture pattern, the first off-axis aperture pattern having a configuration that improves the process window of the first pitch range and the second off-axis aperture pattern having a configuration that improves the process window for a second pitch range; exposing the photoresist layer on the substrate with radiation from an exposure source through the composite aperture and the photomask; and developing the photoresist layer to pattern the photoresist layer.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 28, 2013
    Assignees: GLOBALFOUNDRIES Singapore Pte. Ltd., National University of Singapore
    Inventors: Moh Lung Ling, Gek Soon Chua, Qunying Lin, Cho Jui Tay, Chenggen Quan
  • Patent number: 8034543
    Abstract: A method for forming a semiconductor device is presented. The method includes providing a substrate having a photoresist thereon and transmitting a light source through a mask having a pattern onto the photoresist. The mask comprises a mask substrate having first, second and third regions, the third region is disposed between the first and second regions. The mask also includes a light reducing layer over the mask substrate having a first opening over the first region and a second opening over the second region. The first and second openings have layer sidewalls. The sidewalls of the light reducing layer are slanted at an angle less than 90 degrees from the plane of a top surface of the mask substrate. The method also includes developing the photoresist to transfer the pattern of the mask to the photoresist.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: October 11, 2011
    Assignee: GLOBAL FOUNDRIES Singapore Pte. Ltd.
    Inventors: Gek Soon Chua, Sia Kim Tan, Qunying Lin, Cho Jui Tay, Chenggen Quan
  • Patent number: 7674562
    Abstract: A method for forming a phase shift mask is presented. The method includes providing a substrate including a transparent material having first, second and third regions, the third region being disposed between the first and second regions. The method also includes forming a light reducing layer on a first major surface of the substrate. The light reducing layer is patterned to form a patterned light reducing layer having sidewalls defining openings to expose the first and second regions. The patterned light reducing layer is processed to transform the sidewalls of the patterned light reducing layer to angled sidewalls having an angle of less than 90° from a plane of the first major surface of the substrate. The angled sidewalls improve intensity balance of an image-formed by light-transmitted through the mask.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: March 9, 2010
    Assignee: Chartered Semiconductor Manufacturing, Ltd.
    Inventors: Gek Soon Chua, Sia Kim Tan, Qunying Lin, Cho Jui Tay, Chenggen Quan
  • Patent number: 7127949
    Abstract: A contact pressure sensor (10) and method for manufacturing a contact pressure sensor for detecting contact pressure between two surfaces is disclosed. The contact pressure sensor disclosed comprises a substrate (40) for supporting the sensor and a contact pressure sensitive layer (26) sensitive to pressure applied to the contact pressure sensor. The method disclosed also comprises transferring a process post structure (8) that is formed on a first process support substrate (20) from the first process support substrate to a second contact pressure sensor support substrate (40).
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: October 31, 2006
    Assignee: National University of Singapore
    Inventors: Ramam Akkipeddi, Christopher P Sperring, Siew Lok Toh, Cho Jui Tay, Mustafizur Rahman, Soo Jin Chua