Patents by Inventor Weiran Kong

Weiran Kong 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: 6455363
    Abstract: A method for fabricating an SRAM device having a standard well tub, where an additional well tub is deposited within the standard well tub. In this manner, the dopant concentration is increased in the well area of the SRAM device, which increases both the isolation punchthrough tolerance and the SER immunity of the device. The additional well tub is deposited to a depth that is shallower than the standard well tub. The additional well tub is deposited using an ion implantation process using the same mask set as that used for the threshold voltage adjustment deposition. Thus, no additional mask layer is required to deposit the additional well tub, and the all of the expenses normally associated with an additional mask layer are avoided.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: September 24, 2002
    Assignee: LSI Logic Corporation
    Inventors: Helmut Puchner, Gary K. Giust, Weiran Kong
  • Patent number: 6442061
    Abstract: A method of forming a memory cell according to the present invention. A first pass gate transistor is formed of a first transistor type. The first pass gate transistor has a gate oxide with a first thickness. The source of the first pass gate transistor is electrically connected to a first bit line, and the drain of the first pass gate transistor is electrically connected to a first state node. The gate of the first pass gate transistor is electrically connected to a memory cell enable line. A second pass gate transistor is also formed of the first transistor type. The second pass gate transistor also has a gate oxide with the first thickness. The source of the second pass gate transistor is electrically connected to a second bit line, and the drain of the second pass gate transistor is electrically connected to a second state node. The gate of the second pass gate transistor is electrically connected to the memory cell enable line. A first state node transistor is also formed of the first transistor type.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: August 27, 2002
    Assignee: LSI Logic Corporation
    Inventors: Weiran Kong, Gary K. Giust, Ramnath Venkatraman, Yauh-Ching Liu, Franklin Duan, Ruggero Castagnetti, Steven M. Peterson, Myron J. Buer, Minh Tien Nguyen
  • Patent number: 5888894
    Abstract: A method for reducing stray conductive material near vertical surfaces in semiconductor manufacturing processes comprising the following steps. Deposit the gate oxide, polysilicon and cap oxide layers. Apply a Poly1A mask. The Poly1A mask pattern comprises the Poly1 areas that are part of the final circuit layout as well as additional Poly1 areas that are included to provide planar surfaces to prevent stringer formation. Etch the cap, polysilicon and gate oxide layers to partially form the transistor gate structures. Form oxide spacers on the sides of the transistor gate structures. Apply a source/drain mask. Deposit source/drain dopants to form diffusions. Deposit an interlayer dielectric. Mask and pattern contacts to the diffusions and the Poly1 layer. Deposit blanket TiN/Ti layer(s). Pattern the TiN/Ti layer(s) using a TiN/Ti mask and a dry anisotropic etch. Patterning the TiN/Ti layer(s) may create TiN/Ti stringers along vertical surfaces of the interconnect layer.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: March 30, 1999
    Assignee: Integrated Silicon Solution, Inc.
    Inventors: Weiran Kong, Kai-Ning Chang
  • Patent number: 5602445
    Abstract: A bright, short wavelength blue-violet phosphor for electroluminescent displays comprises an alkaline-based halide as a host material and a rare earth as a dopant. The host alkaline chloride can be chosen from the group II alkaline elements, particularly strontium chloride (SrCl.sub.2) or calcium chloride (CaCl.sub.2), which, with a europium (Eu) or cerium (Ce) rare earth dopant, electroluminesces at a peak wavelength of 404 and 367 nanometers (nm) respectively. The resulting emissions have CIE chromaticity coordinates which lie at the boundary of the visible range for the human eye thereby allowing a greater range of colors for full color flat panel electroluminescent (FPEL) displays.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: February 11, 1997
    Assignee: Oregon Graduate Institute of Science and Technology
    Inventors: Rajendra Solanki, Weiran Kong, Shafqat Ahmed