Patents by Inventor Ganesh Samudra

Ganesh Samudra 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: 7892905
    Abstract: A process for forming a strained channel region for a MOSFET device via formation of adjacent silicon-germanium source/drain regions, has been developed. The process features either blanket deposition of a silicon-germanium layer, or selective growth of a silicon-germanium layer on exposed portions of a source/drain extension region. A laser anneal procedure results in formation of a silicon-germanium source/drain region via consumption of a bottom portion of the silicon-germanium layer and a top portion of the underlying source/drain region. Optimization of the formation of the silicon-germanium source/drain region via laser annealing can be achieved via a pre-amorphization implantation (PAI) procedure applied to exposed portions of the source/drain region prior to deposition of the silicon-germanium layer. Un-reacted top portions of the silicon-germanium layer are selectively removed after the laser anneal procedure.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: February 22, 2011
    Assignee: Globalfoundries Singapore Pte. Ltd.
    Inventors: Kuang Kian Ong, Kin Leong Pey, King Jien Chui, Ganesh Samudra, Yee Chia Yeo, Yung Fu Chong
  • Patent number: 7313780
    Abstract: A trial semiconductor photomask design having discontinuity points is provided, and each of the discontinuity points is treated as simulated light sources. Simulated light from each of the simulated light sources is focused, and a composite image intensity of the focused simulated light is calculated to verify the trial semiconductor photomask design. The trial semiconductor photomask design is sharpened. A photomask design specification is generated for use in fabricating such a photomask.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: December 25, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Andrew Khoh, Byong-Il Choi, Lap Chan, Ganesh Samudra, Yihong Wu
  • 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
  • Patent number: 7238581
    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: Grant
    Filed: December 16, 2004
    Date of Patent: July 3, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: King Jien Chui, Ganesh Samudra, Yee Chia Yeo, Jinping Liu, Kheng Chok Tee, Wee Hong Phua, Lydia Wong
  • Publication number: 20070032026
    Abstract: A process for forming a strained channel region for a MOSFET device via formation of adjacent silicon-germanium source/drain regions, has been developed. The process features either blanket deposition of a silicon-germanium layer, or selective growth of a silicon-germanium layer on exposed portions of a source/drain extension region. A laser anneal procedure results in formation of a silicon-germanium source/drain region via consumption of a bottom portion of the silicon-germanium layer and a top portion of the underlying source/drain region. Optimization of the formation of the silicon-germanium source/drain region via laser annealing can be achieved via a pre-amorphization implantation (PAI) procedure applied to exposed portions of the source/drain region prior to deposition of the silicon-germanium layer. Un-reacted top portions of the silicon-germanium layer are selectively removed after the laser anneal procedure.
    Type: Application
    Filed: August 2, 2005
    Publication date: February 8, 2007
    Inventors: Kuang Ong, Kin Pey, King Chui, Ganesh Samudra, Yee Yeo, Yung Chong
  • Publication number: 20060206852
    Abstract: A trial semiconductor photomask design having discontinuity points is provided, and each of the discontinuity points is treated as simulated light sources. Simulated light from each of the simulated light sources is focused, and a composite image intensity of the focused simulated light is calculated to verify the trial semiconductor photomask design. The trial semiconductor photomask design is sharpened. A photomask design specification is generated for use in fabricating such a photomask.
    Type: Application
    Filed: March 10, 2005
    Publication date: September 14, 2006
    Applicant: Chartered Semiconductor Manufacturing, Ltd.
    Inventors: Andrew Khoh, Byong-Il Choi, Lap Chan, Ganesh Samudra, Yihong Wu
  • 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: 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