Patents by Inventor Hsia Liang Choo

Hsia Liang Choo 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: 7276797
    Abstract: A structure and method for an improved a bond pad structure. A top wiring layer and a top dielectric (IMD) layer over a semiconductor structure are provided. The buffer dielectric layer is formed over the top wiring layer and the top dielectric (IMD) layer. A buffer opening is formed in the buffer dielectric layer exposing at least of portion of the top wiring layer. A barrier layer is formed over the buffer dielectric layer, and the top wiring layer in the buffer opening. A conductive buffer layer is formed over the barrier layer. The conductive buffer layer is planarized to form a buffer pad in the buffer opening. A passivation layer is formed over the buffer pad and the buffer dielectric layer. A bond pad opening is formed in the passivation layer over at least a portion of the buffer pad. A bond pad support layer is formed over the buffer pad and the buffer dielectric layer. A bond pad layer is formed over the bond pad support layer.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: October 2, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Zhang Fan, Zhang Bei Chao, Liu Wuping, Chok Kho Liep, Hsia Liang Choo, Lim Yeow Kheng, Alan Cuthbertson, Tan Juan Boon
  • Patent number: 7148157
    Abstract: A method of forming phoslon (PNO) comprising the following steps. A CVD reaction chamber having a reaction temperature of from about 300 to 600° C. is provided. From about 10 to 200 sccm PH3 gas, from about 50 to 4000 sccm N2 gas and from about 50 to 1000 sccm NH3 gas are introduced into the CVD reaction chamber. Either from about 10 to 200 sccm O2 gas or from about 50 to 1000 sccm N2O gas is introduced into the CVD reaction chamber. An HFRF power of from about 0 watts to 4 kilowatts is also employed. An LFRF power of from about 0 to 5000 watts may also be employed. Employing a phoslon etch stop layer in a borderless contact fabrication. Employing a phoslon lower etch stop layer and/or a phoslon middle etch stop layer in a dual damascene fabrication.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: December 12, 2006
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Hsia Liang Choo, John Sudijono, Liu Huang, Tan Juan Boon
  • Patent number: 6998335
    Abstract: A structure and method for an improved a bond pad structure. We provide a top wiring layer and a top dielectric (IMD) layer over a semiconductor structure. The buffer dielectric layer is formed over the top wiring layer and the top dielectric (IMD) layer. We form a buffer opening in the buffer dielectric layer exposing at least of portion of the top wiring layer. We form a barrier layer over the buffer dielectric layer, and the top wiring layer in the buffer opening. A conductive buffer layer is formed over the barrier layer. We planarize the conductive buffer layer to form a buffer pad in the buffer opening. We form a passivation layer over the buffer pad and the buffer dielectric layer. We form a bond pad opening in the passivation layer over at least a portion of the buffer pad. We form a bond pad support layer over the buffer pad and the buffer dielectric layer. We form a bond pad layer over the a bond pad support layer.
    Type: Grant
    Filed: December 13, 2003
    Date of Patent: February 14, 2006
    Assignee: Chartered Semiconductor Manufacturing, LTD
    Inventors: Zhang Fan, Zhang Bei Chao, Liu Wuping, Chok Kho Liep, Hsia Liang Choo, Lim Yeow Kheng, Alan Cuthbertson, Tan Juan Boon
  • Publication number: 20040077181
    Abstract: A method of forming phoslon (PNO) comprising the following steps. A CVD reaction chamber having a reaction temperature of from about 300 to 600° C. is provided. From about 10 to 200 sccm PH3 gas, from about 50 to 4000 sccm N2 gas and from about 50 to 1000 sccm NH3 gas are introduced into the CVD reaction chamber. Either from about 10 to 200 sccm O2 gas or from about 50 to 1000 sccm N2O gas is introduced into the CVD reaction chamber. An HFRF power of from about 0 watts to 4 kilowatts is also employed. An LFRF power of from about 0 to 5000 watts may also be employed. Employing a phoslon etch stop layer in a borderless contact fabrication. Employing a phoslon lower etch stop layer and/or a phoslon middle etch stop layer in a dual damascene fabrication.
    Type: Application
    Filed: October 22, 2002
    Publication date: April 22, 2004
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Hsia Liang Choo, John Sudijono, Liu Huang, Tan Juan Boon
  • Publication number: 20040021997
    Abstract: According to the present invention, a circuit and a method for protecting the input/output circuitry of an integrated circuit from electrostatic discharge damage is described. In addition, this ESD protection is achieved with as low a snapback voltage as possible to minimize any chance of ESD damage or product reliability. This invention is achieved by a circuit with an electrostatic device ESD protection circuit for input/output, I/O circuitry made up of a p-channel depletion mode metal oxide semiconductor field effect transistor, MOSFET, PA, whose gate is connected to an I/O pad, and an n-channel depletion mode metal oxide semiconductor field effect transistor, MOSFET, NA, whose gate is connected to the I/O pad. The objective of these depletion mode FET devices is to trigger a floating condition for the integrated circuit body or substrate when ESD takes place.
    Type: Application
    Filed: July 30, 2002
    Publication date: February 5, 2004
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventor: Hsia Liang Choo