Patents by Inventor Chung Woh Lai

Chung Woh 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).

  • Publication number: 20080315317
    Abstract: A semiconductor system is provided including providing a semiconductor substrate; forming PMOS and NMOS transistors in and on the semiconductor substrate; forming a tensile strained layer on the semiconductor substrate; and relaxing the tensile strained layer around the PMOS transistor.
    Type: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING LTD.
    Inventors: Chung Woh Lai, Yong Meng Lee, Wenhe Lin, Khee Yong Lim, Young Way Teh, Wee Leng Tan, Hui Peng Koh, John Sudijono, Liang-Choo Hsia
  • Patent number: 7445978
    Abstract: An example process to remove spacers from the gate of a NMOS transistor. A stress creating layer is formed over the NMOS and PMOS transistors and the substrate. In an embodiment, the spacers on gate are removed so that stress layer is closer to the channel of the device. The stress creating layer is preferably a tensile nitride layer. The stress creating layer is preferably a contact etch stop liner layer. In an embodiment, the gates, source and drain region have an silicide layer thereover before the stress creating layer is formed. The embodiment improves the performance of the NMOS transistors.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: November 4, 2008
    Assignee: Chartered Semiconductor Manufacturing, Ltd
    Inventors: Young Way Teh, Yong Meng Lee, Chung Woh Lai, Wenhe Lin, Khee Yong Lim, Wee Leng Tan, John Sudijono, Hui Peng Koh, Liang Choo Hsia
  • Publication number: 20080224228
    Abstract: A method and structure for a memory device, such as a 1T-SRAM, having a capacitor top plate directly over a doped bottom plate region. An example device comprises the following. An isolation film formed as to surround an active area on a substrate. A gate dielectric and gate electrode formed over a portion of the active area. A source element and a drain element in the substrate adjacent to the gate electrode. The drain element is comprised of a drain region and a bottom plate region. The drain region is between the bottom plate region and the gate structure. A capacitor dielectric and a capacitor top plate are over at least portions of the bottom plate region.
    Type: Application
    Filed: March 15, 2007
    Publication date: September 18, 2008
    Inventors: Lee Wee Teo, Yong Meng Lee, Zhao Lun, Chung Woh Lai, Shyue Seng Tan, Jeffrey Chee, Shailendra Mishra, Johnny Widodo
  • Publication number: 20080157223
    Abstract: A method is provided for manufacturing an integrated circuit having a plurality of MOSFET devices, comprising the steps of: providing a plurality of MOSFET devices each having a first and a second structural parameter associated therewith, wherein a value of one of the first and a second structural parameter of each device is selected to provide a value of a performance parameter of the device substantially equal to a predetermined reference value, the predetermined reference value being the same for each device.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING LTD.
    Inventors: Lee Wee Teo, Yong Meng Lee, Jeffrey Chee, Shyue Seng Tan, Chung Woh Lai, Johnny Widodo, Zhao Lun, Shailendra Mishra
  • Publication number: 20080150074
    Abstract: An integrated circuit system is provided including providing a substrate, forming an isolation structure base in the substrate without removal of the substrate, and forming a first transistor in the substrate next to the isolation structure base.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING LTD.
    Inventors: Shailendra Mishra, Lee Wee Teo, Yong Meng Lee, Zhao Lun, Chung Woh Lai, Shyue Seng Tan, Jeffrey Chee, Johnny Widodo
  • Publication number: 20070281410
    Abstract: A first example embodiment provides a method of removing first spacers from gates and incorporating a low-k material into the ILD layer to increase device performance. A second example embodiment comprises replacing the first spacers after silicidation with low-k spacers. This serves to reduce the parasitic capacitances. Also, by implementing the low-k spacers only after silicidation, the embodiments' low-k spacers are not compromised by multiple high dose ion implantations and resist strip steps. The example embodiments can improve device performance, such as the performance of a rim oscillator.
    Type: Application
    Filed: June 5, 2006
    Publication date: December 6, 2007
    Inventors: Yong Meng Lee, Young Way Teh, Chung Woh Lai, Wenhe Lin, Khee Yong Lim, Wee Leng Tan, Hui Peng Koh, John Sudijono, Liang Choo Hsia
  • Patent number: 7256084
    Abstract: An example method embodiment forms spacers that create tensile stress on the substrate on both the PFET and NFET regions. We form PFET and NFET gates and form tensile spacers on the PFET and NFET gates. We implant first ions into the tensile PFET spacers to form neutralized stress PFET spacers. The neutralized stress PFET spacers relieve the tensile stress created by the tensile stress spacers on the substrate. This improves device performance.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: August 14, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Khee Yong Lim, Wenhe Lin, Chung Woh Lai, Yong Meng Lee, Liang Choo Hsia, Young Way Teh, John Sudijono, Wee Leng Tan, Hui Peng Koh
  • Publication number: 20070161244
    Abstract: A method (and apparatus) of post silicide spacer removal includes preventing damage to the silicide spacer through the use of at least one of an oxide layer and a nitride layer.
    Type: Application
    Filed: November 22, 2005
    Publication date: July 12, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brian J. Greene, Chung Woh Lai, Yong Meng Lee, Wenhe Lin, Siddhartha Panda, Kern Rim, Young Way Teh
  • Patent number: 6653227
    Abstract: A new method for forming a high quality cobalt disilicide film in the fabrication of an integrated circuit is described. A semiconductor substrate is provided having silicon regions to be silicided. A thermal oxide layer is grown overlying the semiconductor substrate. A titanium layer is deposited overlying the thermal oxide layer. A cobalt layer is deposited overlying the titanium layer. A titanium nitride capping layer is deposited over the cobalt layer. The substrate is subjected to a first rapid thermal anneal whereby the cobalt is transformed to cobalt monosilicide where it overlies the silicon regions and wherein the cobalt not overlying the silicon regions is unreacted. The unreacted cobalt layer and the capping layer are removed. The substrate is subjected to a second rapid thermal anneal whereby the cobalt monosilicide is transformed to cobalt disilicide to complete formation of a cobalt disilicide film in the manufacture of an integrated circuit.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: November 25, 2003
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Chung Woh Lai, Beichao Zhang, Eng Hua Lim, Arthur Ang, Hai Jiang Peng, Charles Lin
  • Patent number: 6383922
    Abstract: A method for forming a thermally stable cobalt disilicide film in the fabrication of an integrated circuit is described. A semiconductor substrate is provided having silicon regions to be silicided. A cobalt layer is deposited overlying the silicon regions to be silicided. A capping layer is deposited overlying the cobalt layer. The substrate is subjected to a first rapid thermal anneal whereby the cobalt is transformed to cobalt monosilicide where it overlies the silicon regions and wherein the cobalt not overlying the silicon regions is unreacted. The unreacted cobalt layer and the capping layer are removed. A titanium layer is deposited overlying the cobalt monosilicide layer. Thereafter the substrate is subjected to a second rapid thermal anneal whereby the cobalt monosilicide is transformed to cobalt disilicide. The titanium layer provides titanium atoms which diffuse into the cobalt disilicide thereby increasing its thermal stability.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: May 7, 2002
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Bei Chao Zhang, Chung Woh Lai, Eng Hua Lim, Mei Sheng Zhou, Peter Chew, Arthur Ang