Patents by Inventor Joanna Lai

Joanna Lai 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: 9620201
    Abstract: A storage system and method for using hybrid blocks with sub-block erase operations are provided. In one embodiment, a storage system is provided comprising a memory comprising a block, wherein the block comprises a first sub-block and a second sub-block; and a controller in communication with the memory. The controller is configured to erase the first sub-block, wherein the second sub-block is programmed; and program the first sub-block to fewer bits per cell than the second sub-block is programmed to. Other embodiments are provided.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: April 11, 2017
    Assignee: SanDisk Technologies LLC
    Inventors: Joanna Lai, Nian Niles Yang
  • Patent number: 8043943
    Abstract: A method for forming polycrystalline semiconductor film from amorphous semiconductor film at reduced temperatures and/or accelerated rates. The inclusion of a small percentage of semiconductor material, such as 2% within the metal layer, reduces the temperatures required for crystallization of the amorphous semiconductor by at least 50° C. in comparison to the use of the metal layer without the small percentage of semiconductor material. During a low temperature isothermal annealing process adjacent Al-2% Si and a-Si films undergo a layer exchange resulting in formation of a continuous polycrystalline silicon film having good physical and electrical properties. Formation of polycrystalline-semiconductor in this manner is suitable for use with low temperature substrates (e.g., glass, plastic) as well as with numerous integrated circuit and MEMs fabrication devices and practices.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: October 25, 2011
    Assignee: The Regents of the University of California
    Inventors: Roya Maboudian, Frank W. DelRio, Joanna Lai, Tsu-Jae King Liu
  • Publication number: 20100184276
    Abstract: A method for forming polycrystalline semiconductor film from amorphous semiconductor film at reduced temperatures and/or accelerated rates. The inclusion of a small percentage of semiconductor material, such as 2% within the metal layer, reduces the temperatures required for crystallization of the amorphous semiconductor by at least 50° C. in comparison to the use of the metal layer without the small percentage of semiconductor material. During a low temperature isothermal annealing process adjacent Al-2% Si and a-Si films undergo a layer exchange resulting in formation of a continuous polycrystalline silicon film having good physical and electrical properties. Formation of polycrystalline-semiconductor in this manner is suitable for use with low temperature substrates (e.g., glass, plastic) as well as with numerous integrated circuit and MEMs fabrication devices and practices.
    Type: Application
    Filed: December 31, 2009
    Publication date: July 22, 2010
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Roya Maboudian, Frank W. Delrio, Joanna Lai, Tsu-Jae King Liu