Patents by Inventor Ramam Akkipeddi

Ramam Akkipeddi 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 of cleaving GaN/sapphire for forming laser mirror facets
    Patent number: 7208096
    Abstract: A laser device has a substrate and at least one GaN-based layer upon a first surface of the substrate, and the laser device is cleaved by cutting linear grooves into a second surface of the substrate such that the grooves are in alignment with vertical planes of the substrate. The substrate and the at least one GaN-based layer are cleaved along the vertical planes. The cutting is performed using a laser beam from an external laser source.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: April 24, 2007
    Assignee: Agency for Science, Technology and Research
    Inventors: Ramam Akkipeddi, Zhongli Li, Sudhiranjan Tripathy, Soo Jin Chua
  • Contact pressure sensor and method for manufacturing the same
    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
  • Contact pressure sensor and method for manufacturing the same
    Publication number: 20050007721
    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: Application
    Filed: July 8, 2003
    Publication date: January 13, 2005
    Inventors: Ramam Akkipeddi, Christopher Sperring, Siew Toh, Cho Tay, Mustafizur Rahman, Soo Chua
  • Method of cleaving GaN/sapphire for forming laser mirror facets
    Publication number: 20040202217
    Abstract: A method of fabricating a cleaved facet of a laser device having a substrate and at least one GaN-based layer formed upon a first surface of the substrate, said method including the following steps:
    Type: Application
    Filed: June 25, 2003
    Publication date: October 14, 2004
    Inventors: Ramam Akkipeddi, Zhongli Li, Sudhiranjan Tripathy, Soo Jin Chua