Patents by Inventor Kaiping Liu

Kaiping Liu 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: 20130334659
    Abstract: An integrated circuit with vias with different depths stopping on etch stop layers with different thicknesses. A method of simultaneously etching vias with different depths without causing etch damage to the material being contacted by the vias.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 19, 2013
    Inventors: Kaiping LIU, Imran Mahmood KHAN, Richard Allen FAUST
  • Patent number: 8558296
    Abstract: An analog floating-gate electrode in an integrated circuit, and method of fabricating the same, in which trapped charge can be stored for long durations. The analog floating-gate electrode is formed in a polycrystalline silicon gate level, and includes portions serving as a transistor gate electrode, a plate of a metal-to-poly storage capacitor, and a plate of poly-to-active tunneling capacitors. Silicide-block silicon dioxide blocks the formation of silicide cladding on the electrode, while other polysilicon structures in the integrated circuit are silicide-clad.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: October 15, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Imran Mahmood Khan, Allan T. Mitchell, Kaiping Liu
  • Publication number: 20120241829
    Abstract: An analog floating-gate electrode in an integrated circuit, and method of fabricating the same, in which trapped charge can be stored for long durations. The analog floating-gate electrode is formed in a polycrystalline silicon gate level, and includes portions serving as a transistor gate electrode, a plate of a metal-to-poly storage capacitor, and a plate of poly-to-active tunneling capacitors. Silicide-block silicon dioxide blocks the formation of silicide cladding on the electrode, while other polysilicon structures in the integrated circuit are silicide-clad.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 27, 2012
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Imran Mahmood Khan, Allan T. Mitchell, Kaiping Liu
  • Patent number: 7691714
    Abstract: The present invention provides a method for manufacturing a transistor device, a method for manufacturing an integrated circuit, and a transistor device. The method for manufacturing the transistor device, among other steps, includes forming a gate structure over a substrate and forming source/drain regions in the substrate proximate the gate structure, the source/drain regions having a boundary that forms an electrical junction with the substrate. The method further includes forming dislocation loops in the substrate, the dislocation loops not extending outside the boundary of the source/drain regions.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: April 6, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Antonio Luis Pacheco Rotondaro, Kaiping Liu, Jihong Chen, Amitabh Jain
  • Patent number: 7667275
    Abstract: A complementary metal oxide semiconductor (CMOS) device has a substrate 100, a gate structure 108 disposed atop the substrate, and spacers 250, deposited on opposite sides of the gate structure 108 to govern formation of deep source drain regions S, D in the substrate. Spacers 250 are formed of an oxynitride (SiOxNyCz) wherein x and y are non-zero but z may be zero or greater; such oxynitride spacers reduce parasitic capacitance, thus improving device performance.
    Type: Grant
    Filed: September 11, 2004
    Date of Patent: February 23, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Yuanning Chen, Haowen Bu, Kaiping Liu
  • Publication number: 20100022062
    Abstract: The present invention provides a transistor 100 having a germanium implant region 170 located therein, a method of manufacture therefor, and an integrated circuit including the aforementioned transistor. The transistor 100, in one embodiment, includes a polysilicon gate electrode 140 located over a semiconductor substrate 110, wherein a sidewall of the polysilicon gate electrode 140 has a germanium implanted region 170 located therein. The transistor 100 further includes source/drain regions 160 located within the semiconductor substrate 110 proximate the polysilicon gate electrode 140.
    Type: Application
    Filed: October 5, 2009
    Publication date: January 28, 2010
    Applicant: Texas Instruments Incorporated
    Inventors: Kaiping Liu, Zhiqiang Wu, Majid Movahed Mansoorz
  • Patent number: 7611943
    Abstract: A process (200) for making integrated circuits with a gate, uses a doped precursor (124, 126N and/or 126P) on barrier material (118) on gate dielectric (116). The process (200) involves totally consuming (271) the doped precursor (124, 126N and/or 126P) thereby driving dopants (126N and/or 126P) from the doped precursor (124) into the barrier material (118). An integrated circuit has a gate dielectric (116), a doped metallic barrier material (118, 126N and/or 126P) on the gate dielectric (116), and metal silicide (180) on the metallic barrier material (118). Other integrated circuits, transistors, systems and processes of manufacture are disclosed.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: November 3, 2009
    Assignee: Texas Instruments Incorporated
    Inventor: Kaiping Liu
  • Publication number: 20080210976
    Abstract: The present invention provides a semiconductor device, a method of manufacture therefor and an integrated circuit including the same. The semiconductor device 100, among other things, may include a substrate 110 having a lattice structure and having an implanted precipitate region 120 located within the lattice structure. Additionally, the semiconductor device 100 may include a dynamic defect 125 located within the lattice structure and proximate the implanted precipitate region 120, such that the implanted precipitate region 120 affects a position of the dynamic defect 125 within the lattice structure. Located over the substrate 110 in the aforementioned semiconductor device 100 is a gate structure 160.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 4, 2008
    Applicant: Texas Instruments Incorporated
    Inventor: Kaiping Liu
  • Patent number: 7361570
    Abstract: The present invention provides a semiconductor device, a method of manufacture therefor and an integrated circuit including the same. The semiconductor device 100, among other things, may include a substrate 110 having a lattice structure and having an implanted precipitate region 120 located within the lattice structure. Additionally, the semiconductor device 100 may include a dynamic defect 125 located within the lattice structure and proximate the implanted precipitate region 120, such that the implanted precipitate region 120 affects a position of the dynamic defect 125 within the lattice structure. Located over the substrate 110 in the aforementioned semiconductor device 100 is a gate structure 160.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: April 22, 2008
    Assignee: Texas Instruments Incorporated
    Inventor: Kaiping Liu
  • Publication number: 20070004158
    Abstract: The present invention provides a transistor 100 having a germanium implant region 170 located therein, a method of manufacture therefor, and an integrated circuit including the aforementioned transistor. The transistor 100, in one embodiment, includes a polysilicon gate electrode 140 located over a semiconductor substrate 110, wherein a sidewall of the polysilicon gate electrode 140 has a germanium implanted region 170 located therein. The transistor 100 further includes source/drain regions 160 located within the semiconductor substrate 110 proximate the polysilicon gate electrode 140.
    Type: Application
    Filed: September 1, 2006
    Publication date: January 4, 2007
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kaiping Liu, Zhiqiang Wu, Majid Mansoorz
  • Patent number: 7129582
    Abstract: A method of forming a semiconductor device includes implanting a precipitate into a gate conductor of an at least partially formed semiconductor device. The gate conductor including a plurality of semiconductor grains. The boundaries of adjacent grains forming a dopant migration path. A plurality of precipitate regions are formed within the gate conductor. At least some of the precipitate regions located at a junction of at least two grains. The gate conductor of the at least partially formed semiconductor device is doped with a dopant. The dopant diffuses inwardly along the dopant migration path.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: October 31, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Kaiping Liu, Zhiqiang Wu, Jihong Chen
  • Patent number: 7118979
    Abstract: The present invention provides a transistor 100 having a germanium implant region 170 located therein, a method of manufacture therefor, and an integrated circuit including the aforementioned transistor. The transistor 100, in one embodiment, includes a polysilicon gate electrode 140 located over a semiconductor substrate 110, wherein a sidewall of the polysilicon gate electrode 140 has a germanium implanted region 170 located therein. The transistor 100 further includes source/drain regions 160 located within the semiconductor substrate 110 proximate the polysilicon gate electrode 140.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: October 10, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Kaiping Liu, Zhiqiang Wu, Majid Movahed Mansoorz
  • Publication number: 20060216882
    Abstract: A complementary metal oxide semiconductor (CMOS) device has a substrate 100, a gate structure 108 disposed atop the substrate, and spacers 250, deposited on opposite sides of the gate structure 108 to govern formation of deep source drain regions S, D in the substrate. Spacers 250 are formed of an oxynitride (SiOxNyCz) wherein x and y are non-zero but z may be zero or greater; such oxynitride spacers reduce parasitic capacitance, thus improving device performance.
    Type: Application
    Filed: May 31, 2006
    Publication date: September 28, 2006
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Yuanning Chen, Haowen Bu, Kaiping Liu
  • Patent number: 7088123
    Abstract: In one embodiment, a method for extracting C-V characteristics of ultra-thin oxides includes coupling a device under test to a testing structure, in which the device under test includes a plurality of transistors. Alternatively, the device under test includes a plurality of varactors. The method further includes inputting a radio frequency signal of at least one GHz into the testing structure, de-embedding the parasitics of the testing structure, inputting a bias into the device under test, determining the capacitance density per gate width of the device under test, plotting capacitance density per gate width versus gate length to obtain a first curve, and determining a slope of the first curve. These steps are repeated for one or more additional biasing conditions, and the determined slopes are plotted on a capacitance density per voltage graph to obtain a C-V curve for the device under test.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: August 8, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Jau-Yuann Yang, Hamseswari Renganathan, Kaiping Liu, Antonio Luis Pacheco Rotondaro
  • Publication number: 20060163651
    Abstract: The present invention provides a method for manufacturing a transistor device, a method for manufacturing an integrated circuit, and a transistor device. The method for manufacturing the transistor device, among other steps, includes forming a gate structure over a substrate and forming source/drain regions in the substrate proximate the gate structure, the source/drain regions having a boundary that forms an electrical junction with the substrate. The method further includes forming dislocation loops in the substrate, the dislocation loops not extending outside the boundary of the source/drain regions.
    Type: Application
    Filed: January 25, 2005
    Publication date: July 27, 2006
    Applicant: Texas Instruments, Incorporated
    Inventors: Antonio Rotondaro, Kaiping Liu, Jihong Chen, Amitabh Jain
  • Patent number: 7064039
    Abstract: Methods are discussed for forming a localized halo structure and a retrograde profile in a substrate of a semiconductor device. The method comprises providing a gate structure over the semiconductor substrate, wherein a dopant material is implanted at an angle around the gate structure to form a halo structure in a source/drain region of the substrate and underlying a portion of the gate structure. A trench is formed in the source/drain region of the semiconductor substrate thereby removing at least a portion of the halo structure in the source/drain region. A silicon material layer is then formed in the trench using an epitaxial deposition.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: June 20, 2006
    Assignee: Texas Instruments Incorporated
    Inventor: Kaiping Liu
  • Patent number: 7038258
    Abstract: The present invention provides a semiconductor device 200 having a localized halo implant 250 located therein, a method of manufacture therefore and an integrated circuit including the semiconductor device. In one embodiment, the semiconductor device 200 includes a gate 244 located over a substrate 210, the substrate 210 having a source and a drain 230 located therein. In the same embodiment, located adjacent each of the source and drain 230 are localized halo implants 250, each of the localized halo implants 250 having a vertical implant region 260 and an angled implant region 265. Further, at an intersection of the vertical implant region 260 and the angled implant region 265 is an area of peak concentration.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: May 2, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Kaiping Liu, Zhiqiang Wu
  • Publication number: 20060084247
    Abstract: A process (200) for making integrated circuits with a gate, uses a doped precursor (124, 126N and/or 126P) on barrier material (118) on gate dielectric (116). The process (200) involves totally consuming (271) the doped precursor (124, 126N and/or 126P) thereby driving dopants (126N and/or 126P) from the doped precursor (124) into the barrier material (118). An integrated circuit has a gate dielectric (116), a doped metallic barrier material (118, 126N and/or 126P) on the gate dielectric (116), and metal silicide (180) on the metallic barrier material (118). Other integrated circuits, transistors, systems and processes of manufacture are disclosed.
    Type: Application
    Filed: October 12, 2005
    Publication date: April 20, 2006
    Inventor: Kaiping Liu
  • Patent number: 7029967
    Abstract: A method for forming metal silicide regions in source and drain regions (160, 170) is described. Prior to the thermal annealing of the source and drain regions (160, 170), germanium is implanted into a semiconductor substrate adjacent to sidewall structures (90, 95) formed adjacent gate structures (60, 70). The position of the implanted germanium species in the semiconductor substrate will overlap the source and drain regions (160, 170). Following thermal annealing of the source and drain regions (160, 170), the implanted germanium prevents the formation of metal silicide spikes.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: April 18, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Song Zhao, Sue E. Crank, Amitava Chatterjee, Kaiping Liu, Jiong-Ping Lu, Donald S. Miles, Duofeng Yue, Lance S. Robertson
  • Publication number: 20060054934
    Abstract: A complementary metal oxide semiconductor (CMOS) device has a substrate 100, a gate structure 108 disposed atop the substrate, and spacers 250, deposited on opposite sides of the gate structure 108 to govern formation of deep source drain regions S, D in the substrate. Spacers 250 are formed of an oxynitride (SiOxNyCz) wherein x and y are non-zero but z may be zero or greater; such oxynitride spacers reduce parasitic capacitance, thus improving device performance.
    Type: Application
    Filed: September 11, 2004
    Publication date: March 16, 2006
    Inventors: Yuanning Chen, Haowen Bu, Kaiping Liu