Patents by Inventor Kheng Tee

Kheng Tee 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: 20070178652
    Abstract: A structure and method of reducing junction capacitance of a source/drain region in a transistor. A gate structure is formed over on a first conductive type substrate. We perform a doped depletion region implantation by implanting ions being the second conductive type to the substrate using the gate structure as a mask, to form a doped depletion region beneath and separated from the source/drain regions. The doped depletion regions have an impurity concentration and thickness so that the doped depletion regions are depleted due to a built-in potential creatable between the doped depletion regions and the substrate. The doped depletion region and substrate form depletion regions between the source/drain regions and the doped depletion region. We perform a S/D implant by implanting ions having a second conductivity type into the substrate to form S/D regions. The doped depletion region and depletion regions reduce the capacitance between the source/drain regions and the substrate.
    Type: Application
    Filed: February 14, 2007
    Publication date: August 2, 2007
    Inventors: King Chui, Francis Benistant, Ganesh Samudra, Kian Tee, Yisuo Li, Kum Woh Leong, Kheng Tee
  • Publication number: 20060030094
    Abstract: A method of manufacturing a semiconductor device provides a semiconductor substrate with a gate and a number of source/drain regions on the semiconductor substrate. A layer containing a strain-inducing element is provided over the number of source/drain regions. The strain-inducing element is driven from the layer containing a strain-inducing element into the number of source/drain regions. A number of source/drains is formed in the number of source/drain regions.
    Type: Application
    Filed: December 16, 2004
    Publication date: February 9, 2006
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: King Chui, Ganesh Samudra, Yee Yeo, Jinping Liu, Kheng Tee, Wee Phua, Lydia Wong
  • Publication number: 20060006427
    Abstract: A structure and method for forming a carbon-containing layer in at least a portion of the end of range regions of implanted PAI and/or doped regions. The C-containing layer/region getters defects from the implanted PAI region or doped region. Example embodiments show a C-containing layer under at FET. Other example embodiments show an implanted C-containing regions implanted into the EOR region of implanted doped regions, such as pocket regions, S/D regions and SDE regions. Low temperature anneals can be used because the carbon-containing layer reduces defects.
    Type: Application
    Filed: July 7, 2004
    Publication date: January 12, 2006
    Inventors: Chung Tan, Jinping Liu, Hyeokjae Lee, Kheng Tee, Elgin Quek
  • Publication number: 20060008973
    Abstract: A process to form a FET using a replacement gate. An example feature is that the PMOS sacrificial gate is made narrower than the NMOS sacrificial gate. The PMOS gate is implanted preferably with Ge to increase the amount of poly sacrificial gate that is oxidized to form PMOS spacers. The spacers are used as masks for the LDD Implant. The space between the PLLD regions is preferably larger that the space between the NLDD regions because of the wider PMOS spacers. The PLDD tends to diffuse readily more than NLDD due to the dopant being small and light (i.e. Boron). The wider spacer between the PMOS regions improves device performance by improving the short channel effects for PMOS. In addition, the oxidization of the sacrificial gates allows trimming of sacrificial gates thus extending the limitation of lithography. Another feature of an embodiment is that a portion of the initial pad oxide is removed, thus reducing the amount of undercut created during the channel oxide strip for the dummy gate process.
    Type: Application
    Filed: July 7, 2004
    Publication date: January 12, 2006
    Inventors: Timothy Phua, Kheng Tee, Liang Hsia
  • Publication number: 20050227423
    Abstract: A system is provided for forming a semiconductor device. Layers of gate dielectric material, gate material, and cap material are formed on a semiconductor substrate. The cap material and a portion of the gate material are processed to form a cap and a gate body portion. A wing on the gate body portion is formed from a remaining portion of the gate material. The gate dielectric material under a portion of the wing on the gate body portion is removed to form a gate dielectric. A lightly-doped source/drain region is formed in the semiconductor substrate using the gate body portion and the wing.
    Type: Application
    Filed: April 7, 2004
    Publication date: October 13, 2005
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Timothy Phua, Kheng Tee, Liang Hsia
  • Publication number: 20050208712
    Abstract: A MOSFET device structure formed on a silicon on insulator layer, and a process sequence employed to fabricate said MOSFET device structure, has been developed. The process features insulator filled, shallow trench isolation (STI) regions formed in specific locations of the MOSFET device structure for purposes of reducing the risk of parasitic transistor formation underlying a gate structure junction. After formation of either a “T” shaped, or an “H” shaped gate structure, body contact regions of a first conductivity type are formed adjacent to both an STI region and to a component of the gate structure. Formation of a source/drain region of a second conductivity type located on the opposite side of the same STI region, and the same gate structure component, is next performed. Unwanted parasitic transistor formation, which can occur underlying the gate structure via the body contact region and the source/drain region, is prevented by the presence of the separating STI region.
    Type: Application
    Filed: May 12, 2005
    Publication date: September 22, 2005
    Inventors: Yeen Chan, Kheng Tee, Yiang Nga, Zhao Lun, Wang Goh, Diing Ang
  • Publication number: 20050196938
    Abstract: A new method to prevent cracking at the corners of a semiconductor die during dicing is described. Dummy metal structures are fabricated at the corners of the die to prevent cracking. The design for the dummy metal structures can be generated automatically by a computer program.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 8, 2005
    Inventors: Patrick Tan, Kheng Tee, David Vigar
  • Publication number: 20050156253
    Abstract: A structure and method of reducing junction capacitance of a source/drain region in a transistor. A gate structure is formed over on a first conductive type substrate. We perform a doped depletion region implantation by implanting ions being the second conductive type to the substrate using the gate structure as a mask, to form a doped depletion region beneath and separated from the source/drain regions. The doped depletion regions have an impurity concentration and thickness so that the doped depletion regions are depleted due to a built-in potential creatable between the doped depletion regions and the substrate. The doped depletion region and substrate form depletion regions between the source/drain regions and the doped depletion region. We perform a S/D implant by implanting ions having a second conductivity type into the substrate to form S/D regions. The doped depletion region and depletion regions reduce the capacitance between the source/drain regions and the substrate.
    Type: Application
    Filed: January 21, 2004
    Publication date: July 21, 2005
    Inventors: King Chui, Francis Benistant, Ganesh Samudra, Kian Tee, Yisuo Li, Kum Leong, Kheng Tee
  • Publication number: 20050023608
    Abstract: A MOSFET device structure formed on a silicon on insulator layer, and a process sequence employed to fabricate said MOSFET device structure, has been developed. The process features insulator filled, shallow trench isolation (STI) regions formed in specific locations of the MOSFET device structure for purposes of reducing the risk of parasitic transistor formation underlying a gate structure junction. After formation of either a “T” shaped, or an “H” shaped gate structure, body contact regions of a first conductivity type are formed adjacent to both an STI region and to a component of the gate structure. Formation of a source/drain region of a second conductivity type located on the opposite side of the same STI region, and the same gate structure component, is next performed. Unwanted parasitic transistor formation, which can occur underlying the gate structure via the body contact region and the source/drain region, is prevented by the presence of the separating STI region.
    Type: Application
    Filed: July 29, 2003
    Publication date: February 3, 2005
    Inventors: Yeen Chan, Kheng Tee, Yiang Nga, Zhao Lun, Wang Goh, Diing Ang