Patents by Inventor Shijian Li

Shijian Li 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: 8187968
    Abstract: Presented are methods of fabricating three-dimensional integrated circuits that include post-contact back end of line through-hole via integration for the three-dimensional integrated circuits. Another aspect of the present invention includes three-dimensional integrated circuits fabricated according to methods of the present invention.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: May 29, 2012
    Assignee: Lam Research Corporation
    Inventors: John Boyd, Fritz Redeker, Yezdi Dordi, Hyungsuk Alexander Yoon, Shijian Li
  • Patent number: 8168519
    Abstract: Plasma immersion ion implantation employing a very high RF bias voltage on an electrostatic chuck to attain a requisite implant depth profile is carried out by first depositing a partially conductive silicon-containing seasoning layer over the interior chamber surfaces prior to wafer introduction.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: May 1, 2012
    Assignee: Applied Materials, Inc.
    Inventors: Shijian Li, Kartik Ramaswamy, Hiroji Hanawa, Seon-Mee Cho, Biagio Gallo, Dongwon Choi, Majeed A. Foad
  • Publication number: 20120024230
    Abstract: The present invention pertains to methods, apparatuses, and systems for fabricating three-dimensional integrated circuits. One or more embodiments of systems, apparatuses, and/or methods according to the present invention are presented.
    Type: Application
    Filed: October 5, 2011
    Publication date: February 2, 2012
    Inventors: Shijian Li, Fritz Redeker, Yezdi Dordi
  • Patent number: 8053355
    Abstract: The present invention relates to methods and systems for the metallization of semiconductor devices. One aspect of the present invention is a method of depositing a copper layer onto a barrier layer so as to produce a substantially oxygen free interface therebetween. In one embodiment, the method includes providing a substantially oxide free surface of the barrier layer. The method also includes depositing an amount of atomic layer deposition (ALD) copper on the oxide free surface of the barrier layer effective to prevent oxidation of the barrier layer. The method further includes depositing a gapfill copper layer over the ALD copper. Another aspect of the present invention is a system for depositing a copper layer onto barrier layer so as to produce a substantially oxygen-free interface therebetween. In one embodiment, the integrated system includes at least one barrier deposition module. The system also includes an ALD copper deposition module configured to deposit copper by atomic layer deposition.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: November 8, 2011
    Assignee: Lam Research Corporation
    Inventors: Fritz Redeker, John Boyd, Yezdi Dordi, Hyungsuk Alexander Yoon, Shijian Li
  • Publication number: 20110259268
    Abstract: Embodiments of the invention generally provide apparatuses for endpoint detection of dopants. In one embodiment, the apparatus has a plasma chamber containing a body having sidewalls, a lid, and a bottom encompassing an interior volume and a substrate support assembly disposed within the body and having a substrate supporting surface configured to support a substrate. The apparatus also has a processing region disposed between the substrate supporting surface and a gas distribution assembly—which contains a perforated plate disposed above the substrate supporting surface. The apparatus also has a plasma source coupled with the body and configured to form an inductively coupled plasma within the interior region. Additionally, the apparatus has an optical sensor disposed either above or below the substrate supporting surface and coupled with a controller, wherein the controller is configured to derive a current dopant concentration relative to an amount of radiation received by the optical sensor.
    Type: Application
    Filed: July 7, 2011
    Publication date: October 27, 2011
    Inventors: MAJEED A. FOAD, SHIJIAN LI
  • Patent number: 8034409
    Abstract: The present invention pertains to methods, apparatuses, and systems for fabricating three-dimensional integrated circuits. One embodiment of the method comprises providing a wafer or other substrate having a plurality of through holes. In addition, the method includes supporting the wafer or other substrate with a wafer or other substrate holder mounted in a process chamber. The method further includes generating a pressure differential between the front side of the wafer or other substrate and the back side of the wafer or other substrate while the wafer or other substrate is supported on the wafer or other substrate holder so that the pressure differential causes fluid flow through the through holes. Also, the method includes establishing process conditions in the process chamber for at least one process to fabricate integrated circuits. Embodiments of a system and embodiments of an apparatus according to the present invention are also presented.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: October 11, 2011
    Assignee: Lam Research Corporation
    Inventors: Shijian Li, Fritz Redeker, Yezdi Dordi
  • Publication number: 20110207307
    Abstract: Plasma immersion ion implantation employing a very high RF bias voltage on an electrostatic chuck to attain a requisite implant depth profile is carried out by first depositing a partially conductive silicon-containing seasoning layer over the interior chamber surfaces prior to wafer introduction.
    Type: Application
    Filed: May 5, 2011
    Publication date: August 25, 2011
    Applicant: Applied Materials, Inc.
    Inventors: Shijian Li, Kartik Ramaswamy, Hiroji Hanawa, Seon-Mee Cho, Biagio Gallo, Dongwon Choi, Majeed A. Foad
  • Patent number: 7980255
    Abstract: In a first aspect, a module is provided that is adapted to process a wafer. The module includes a processing portion having one or more features such as (1) a rotatable wafer support for rotating an input wafer from a first orientation wherein the wafer is in line with a load port to a second orientation wherein the wafer is in line with an unload port; (2) a catcher adapted to contact and travel passively with a wafer as it is unloaded from the processing portion; (3) an enclosed output portion adapted to create a laminar air flow from one side thereof to the other; (4) an output portion having a plurality of wafer receivers; (5) submerged fluidnozzles; and/or (6) drying gas flow deflectors, etc. Other aspects include methods of wafer processing.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: July 19, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Younes Achkire, Alexander Lerner, Boris T. Govzman, Boris Fishkin, Michael Sugarman, Rashid Mavleiv, Haoquan Fang, Shijian Li, Guy Shirazi, Jianshe Tang
  • Patent number: 7977199
    Abstract: Embodiments of the invention generally provide methods for end point detection at predetermined dopant concentrations during plasma doping processes. In one embodiment, a method includes positioning a substrate within a process chamber, generating a plasma above the substrate and transmitting a light generated by the plasma through the substrate, wherein the light enters the topside and exits the backside of the substrate, and receiving the light by a sensor positioned below the substrate. The method further provides generating a signal proportional to the light received by the sensor, implanting the substrate with a dopant during a doping process, generating multiple light signals proportional to a decreasing amount of the light received by the sensor during the doping process, generating an end point signal proportional to the light received by the sensor once the substrate has a final dopant concentration, and ceasing the doping process.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: July 12, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Majeed A. Foad, Shijian Li
  • Patent number: 7968439
    Abstract: Plasma immersion ion implantation employing a very high RF bias voltage on an electrostatic chuck to attain a requisite implant depth profile is carried out by first depositing a partially conductive silicon-containing seasoning layer over the interior chamber surfaces prior to wafer introduction.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: June 28, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Shijian Li, Kartik Ramaswamy, Hiroji Hanawa, Seon-Mee Cho, Biagio Gallo, Dongwon Choi, Majeed A. Foad
  • Publication number: 20110143553
    Abstract: Methods and systems for handling a substrate through processes including an integrated electroless deposition process includes processing a surface of the substrate in an electroless deposition module to deposit a layer over conductive features of the substrate using a deposition fluid. The surface of the substrate is then rinsed in the electroless deposition module with a rinsing fluid. The rinsing is controlled to prevent de-wetting of the surface so that a transfer film defined from the rinsing fluid remains coated over the surface of the substrate. The substrate is removed from the electroless deposition module while maintaining the transfer film over the surface of the substrate. The transfer film over the surface of the substrate prevents drying of the surface of the substrate so that the removing is wet. The substrate, once removed from the electroless deposition module, is moved into a post-deposition module while maintaining the transfer film over the surface of the substrate.
    Type: Application
    Filed: December 10, 2010
    Publication date: June 16, 2011
    Applicant: Lam Research Corporation
    Inventors: Yaxin Wang, Shijian Li, Fritz Redeker, John Parks, Artur Kolics, Hyungsuk Alexander Yoon, Tarek Suwwan de Felipe, Mikhail Korolik
  • Publication number: 20100267229
    Abstract: The present invention relates to methods and systems for the metallization of semiconductor devices. One aspect of the present invention is a method of depositing a copper layer onto a barrier layer so as to produce a substantially oxygen free interface therebetween. In one embodiment, the method includes providing a substantially oxide free surface of the barrier layer. The method also includes depositing an amount of atomic layer deposition (ALD) copper on the oxide free surface of the barrier layer effective to prevent oxidation of the barrier layer. The method further includes depositing a gapfill copper layer over the ALD copper. Another aspect of the present invention is a system for depositing a copper layer onto barrier layer so as to produce a substantially oxygen-free interface therebetween. In one embodiment, the integrated system includes at least one barrier deposition module. The system also includes an ALD copper deposition module configured to deposit copper by atomic layer deposition.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Inventors: Fritz Redeker, John Boyd, Yezdi Dordi, Hyungsuk Alexander Yoon, Shijian Li
  • Publication number: 20100216258
    Abstract: Embodiments of the invention generally provide methods for end point detection at predetermined dopant concentrations during plasma doping processes. In one embodiment, a method includes positioning a substrate within a process chamber, generating a plasma above the substrate and transmitting a light generated by the plasma through the substrate, wherein the light enters the topside and exits the backside of the substrate, and receiving the light by a sensor positioned below the substrate. The method further provides generating a signal proportional to the light received by the sensor, implanting the substrate with a dopant during a doping process, generating multiple light signals proportional to a decreasing amount of the light received by the sensor during the doping process, generating an end point signal proportional to the light received by the sensor once the substrate has a final dopant concentration, and ceasing the doping process.
    Type: Application
    Filed: May 10, 2010
    Publication date: August 26, 2010
    Inventors: Majeed A. Foad, Shijian Li
  • Patent number: 7749893
    Abstract: The present invention relates to methods and systems for the metallization of semiconductor devices. One aspect of the present invention is a method of depositing a copper layer onto a barrier layer so as to produce a substantially oxygen free interface therebetween. In one embodiment, the method includes providing a substantially oxide free surface of the barrier layer. The method also includes depositing an amount of atomic layer deposition (ALD) copper on the oxide free surface of the barrier layer effective to prevent oxidation of the barrier layer. The method further includes depositing a gapfill copper layer over the ALD copper. Another aspect of the present invention is a system for depositing a copper layer onto barrier layer so as to produce a substantially oxygen-free interface therebetween. In one embodiment, the integrated system includes at least one barrier deposition module. The system also includes an ALD copper deposition module configured to deposit copper by atomic layer deposition.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: July 6, 2010
    Assignee: Lam Research Corporation
    Inventors: Fritz Redeker, John Boyd, Yezdi Dordi, Hyungsuk Alexander Yoon, Shijian Li
  • Patent number: 7732309
    Abstract: Methods for implanting ions into a substrate by a plasma immersion ion implanting process are provided. In one embodiment, the method for implanting ions into a substrate by a plasma immersion ion implantation process includes providing a substrate into a processing chamber, supplying a gas mixture including a reacting gas and a reducing gas into the chamber, and implanting ions from the gas mixture into the substrate. In another embodiment, the method includes providing a substrate into a processing chamber, supplying a gas mixture including reacting gas and a hydrogen containing reducing gas into the chamber, and implanting ions from the gas mixture into the substrate.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: June 8, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Shijian Li, Kartik Ramaswamy, Biagio Gallo, Dong Hyung Lee, Majeed A. Foad
  • Patent number: 7713757
    Abstract: Embodiments of the invention generally provide methods for end point detection at predetermined dopant concentrations during plasma doping processes. In one embodiment, a method includes positioning a substrate within a process chamber, generating a plasma above the substrate and transmitting a light generated by the plasma through the substrate, wherein the light enters the topside and exits the backside of the substrate, and receiving the light by a sensor positioned below the substrate. The method further provides generating a signal proportional to the light received by the sensor, implanting the substrate with a dopant during a doping process, generating multiple light signals proportional to a decreasing amount of the light received by the sensor during the doping process, generating an end point signal proportional to the light received by the sensor once the substrate has a final dopant concentration, and ceasing the doping process.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: May 11, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Majeed A. Foad, Shijian Li
  • Patent number: 7691755
    Abstract: A method is provided for performing plasma immersion ion implantation with a highly uniform seasoning film on the interior of a reactor chamber having a ceiling and a cylindrical side wall and a wafer support pedestal facing the ceiling. The method includes providing a gas distribution ring with plural gas injection orifices on a periphery of a wafer support pedestal, the orifices facing radially outwardly from the wafer support pedestal. Silicon-containing gas is introduced through the gas distribution orifices of the ring to establish a radially outward flow pattern of the silicon-containing gas. The reactor includes pairs of conduit ports in the ceiling adjacent the side wall at opposing sides thereof and respective external conduits generally spanning the diameter of the chamber and coupled to respective pairs of the ports. The method further includes injecting oxygen gas through the conduit ports into the chamber to establish an axially downward flow pattern of oxygen gas in the chamber.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: April 6, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Shijian Li, Lily L. Pang, Majeed A. Foad, Seon-Mee Cho
  • Publication number: 20100062164
    Abstract: Methods and solutions for preventing the formation of metal particulate defect matter upon a substrate after plating processes are provided. In particular, solutions are provided which are free of oxidizing agents and include a non-metal pH adjusting agent in sufficient concentration such that the solution has a pH between approximately 7.5 and approximately 12.0. In some cases, a solution may include a chelating agent. In addition or alternatively, a solution may include at least two different types of complexing agents each offering a single point of attachment for binding metal ions via respectively different functional groups. In any case, at least one of the complexing agents or the chelating agent includes a non-amine or non-imine functional group. An embodiment of a method for processing a substrate includes plating a metal layer upon the substrate and subsequently exposing the substrate to a solution comprising the aforementioned make-up.
    Type: Application
    Filed: September 8, 2008
    Publication date: March 11, 2010
    Applicant: Lam Research
    Inventors: Shijian Li, Artur K. Kolics, Tiruchirapalli N. Arunagiri
  • Publication number: 20100044867
    Abstract: Presented are methods of fabricating three-dimensional integrated circuits that include post-contact back end of line through-hole via integration for the three-dimensional integrated circuits. Another aspect of the present invention includes three-dimensional integrated circuits fabricated according to methods of the present invention.
    Type: Application
    Filed: November 5, 2009
    Publication date: February 25, 2010
    Inventors: John Boyd, Fritz Redeker, Yezdi Dordi, Hyungsuk Alexander Yoon, Shijian Li
  • Publication number: 20100006124
    Abstract: In a first aspect, a module is provided that is adapted to process a wafer. The module includes a processing portion having one or more features such as (1) a rotatable wafer support for rotating an input wafer from a first orientation wherein the wafer is in line with a load port to a second orientation wherein the wafer is in line with an unload port; (2) a catcher adapted to contact and travel passively with a wafer as it is unloaded from the processing portion; (3) an enclosed output portion adapted to create a laminar air flow from one side thereof to the other; (4) an output portion having a plurality of wafer receivers; (5) submerged fluid nozzles; and/or (6) drying gas flow deflectors, etc. Other aspects include methods of wafer processing.
    Type: Application
    Filed: December 29, 2008
    Publication date: January 14, 2010
    Inventors: Younes Achkire, Alexander Lerner, Boris T. Govzman, Boris Fishkin, Michael Sugarman, Rashid Mavleiv, Hoaquan Fang, Shijian Li, Guy Shirazi, Jianshe Tang