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: 7232761
    Abstract: Method and apparatus are provided for polishing conductive materials with low dishing of features and reduced or minimal remaining residues. In one aspect, a method is provided for processing a substrate by polishing the substrate to remove bulk conductive material and polishing the substrate by a ratio of carrier head rotational speed to platen rotational speed of between about 2:1 and about 3:1 to remove residual conductive material. In another aspect, a method is provided for processing a substrate including polishing the substrate at a first relative linear velocity between about 600 mm/second and about 1900 mm/second at the center of the substrate, and polishing the substrate at a second relative linear velocity between about 100 mm/second and about 550 mm/second at the center of the substrate.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: June 19, 2007
    Assignee: Applied Materials, Inc.
    Inventors: Shijian Li, Jui-Lung Li, Shi-Ping Wang, Gary Lam, David Mai, Fred C. Redeker
  • Patent number: 7220322
    Abstract: A polishing pad is cleaned of Cu CMP by-products, subsequent to planarizing a wafer, to reduce pad-glazing by applying to the polishing pad surface a composition comprising about 0.1 to about 3.0 wt. % of at least one organic compound having one or more amine or amide groups, an acid or a base in an amount sufficient to adjust the pH of the composition to about 5.0 to about 12.0, the remainder water. Embodiments comprise ex situ cleaning of a rotating polishing pad by applying a solution having a pH of about 5.0 to about 12.0 at a flow rate of about 100 to about 600 ml/min. for about 3 to about 20 seconds after polishing a wafer having a Cu-containing surface and then removing the cleaning solution from the polishing pad by high pressure rinsing with water.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: May 22, 2007
    Assignee: Applied Materials, Inc.
    Inventors: Lizhong Sun, Shijian Li, Fred C. Redeker
  • Patent number: 7201636
    Abstract: A substrate is chemical mechanical polished with a high-selectivity slurry until the stop layer is at least partially exposed, and then the substrate is polished with a low-selectivity slurry until the stop layer is completely exposed.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: April 10, 2007
    Assignee: Applied Materials, Inc.
    Inventors: Raymond R. Jin, Shijian Li, Fred C. Redeker, Thomas H. Osterheld
  • Publication number: 20070066200
    Abstract: Methods, articles of manufacture, and apparatus are provided for depositing and planarizing one or more layers of material on a substrate, or combinations thereof, are disclosed. In one embodiment, an article of manufacture is provided for polishing a substrate, comprising a polishing article having a polishing surface, a plurality of perforations formed in at least a portion of the polishing article for flow of material therethrough, and a plurality of grooves disposed in the polishing surface. The article of manufacture may be used in a method for processing a substrate, comprising positioning the substrate in an electrolyte solution containing a polishing article, optionally depositing a material on the substrate by an electrochemical deposition method, and polishing the substrate with the polishing article.
    Type: Application
    Filed: May 5, 2006
    Publication date: March 22, 2007
    Inventors: Shijian Li, Liang-Yuh Chen, Alain Duboust
  • Publication number: 20070029046
    Abstract: A substrate processing system is provided. A housing defines a processing chamber. A plasma-generating system is operatively coupled to the processing chamber. A substrate support member is disposed within the processing chamber and configured to hold a substrate during substrate processing. A ceramic insert is disposed over the substrate support member such that the ceramic insert is disposed between the substrate support member and the substrate during substrate processing. A gas-delivery system is configured to introduce gases into the processing chamber. A controller controls the plasma-generating system and the gas-delivery system.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 8, 2007
    Applicant: Applied Materials, Inc.
    Inventors: Shijian Li, Siqing Lu, Irene Chou, Young Lee, Tetsuya Ishikawa
  • Publication number: 20060217049
    Abstract: Methods, articles of manufacture, and apparatus are provided for depositing and planarizing one or more layers of material on a substrate, or combinations thereof, are disclosed. In one embodiment, an article of manufacture is provided for polishing a substrate, comprising a polishing article having a polishing surface, a plurality of perforations formed in at least a portion of the polishing article for flow of material therethrough, and a plurality of grooves disposed in the polishing surface. The article of manufacture may be used in a method for processing a substrate, comprising positioning the substrate in an electrolyte solution containing a polishing article, optionally depositing a material on the substrate by an electrochemical deposition method, and polishing the substrate with the polishing article.
    Type: Application
    Filed: May 6, 2006
    Publication date: September 28, 2006
    Inventors: Shijian Li, Liang-Yuh Chen, Alain Duboust
  • Patent number: 7104267
    Abstract: A process for treating a copper or copper alloy substrate surface with a composition and corrosion inhibitor solution to minimize defect formation and surface corrosion, the method including applying a composition including one or more chelating agents, a pH adjusting agent to produce a pH between about 3 and about 11, and deionized water, and then applying a corrosion inhibitor solution. The composition may further comprise a reducing agent and/or corrosion inhibitor. The method may further comprise applying the corrosion inhibitor solution prior to treating the substrate surface with the composition.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: September 12, 2006
    Assignee: Applied Materials Inc.
    Inventors: Ramin Emami, Shijian Li, Sen-Hou Ko, Fred C. Redeker, Madhavi Chandrachood
  • Publication number: 20060174921
    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: April 4, 2006
    Publication date: August 10, 2006
    Inventors: Younes Achkire, Alexander Lerner, Boris Govzman, Boris Fishkin, Michael Sugarman, Rashid Mavleiv, Haoquan Fang, Shijian Li, Guy Shirazi, Jianshe Tang
  • Publication number: 20060166487
    Abstract: Methods and apparatus for processing substrates to improve polishing uniformity, improve planarization, remove residual material and minimize defect formation are provided. In one aspect, a method is provided for processing a substrate having a conductive material and a low dielectric constant material disposed thereon including polishing a substrate at a polishing pressures of about 2 psi or less and at platen rotational speeds of about 200 cps or greater. The polishing process may use an abrasive-containing polishing composition having up to about 1 wt. % of abrasives. The polishing process may be integrated into a multi-step polishing process.
    Type: Application
    Filed: March 30, 2006
    Publication date: July 27, 2006
    Inventors: Stan Tsai, Liang-Yuh Chen, Lizhong Sun, Shijian Li, Feng Liu, Rashid Mavliev, Ratson Morad, Daniel Carl
  • Publication number: 20060148387
    Abstract: A carrier head for chemical mechanical polishing, includes a base, a support structure attached to the base having a surface for contacting a substrate, and a retaining structure attached to the base to prevent the substrate from moving along the surface. The retaining structure and the surface define a cavity for receiving the substrate. The retaining structure includes an upper portion in contact with the base, a lower portion, and a vibration damper separating the upper portion and the lower portion. The vibration damper, the vibration damper includes a material that does not rebound to its original shape when subjected to a deformation.
    Type: Application
    Filed: January 17, 2006
    Publication date: July 6, 2006
    Inventors: Hung Chen, John White, Shijian Li, Fred Redeker, Ramin Emami
  • Publication number: 20060144825
    Abstract: Compositions and methods for removal of barrier layer materials by a chemical mechanical polishing technique are provided. In one aspect, the invention provides a composition adapted for removing a barrier layer material in a chemical mechanical polishing technique including at least one reducing agent selected from the group of bicarboxylic acids, tricarboxylic acids, and combinations thereof, at least one reducing agent selected from the group of glucose, hydroxylamine, and combinations thereof, and deionized water, wherein the composition has a pH of about 7 or less. The composition may be used in a method for removing the barrier layer material including applying the composition to a polishing pad and polishing the substrate in the presence of the composition to remove the barrier layer.
    Type: Application
    Filed: March 6, 2006
    Publication date: July 6, 2006
    Inventors: Stand Tsai, Shijian Li, Feng Liu, Lizhong Sun, Liang-Yuh Chen
  • Patent number: 7059948
    Abstract: Methods, articles of manufacture, and apparatus are provided for depositing a layer, planarizing a layer, or combinations thereof, a material layer on a substrate. In one embodiment, an article of manufacture is provided for polishing a substrate, comprising a polishing article having a polishing surface, a plurality of passages formed through the polishing article for flow of material therethrough, and a plurality of grooves disposed in the polishing surface. The article of manufacture may be used in a processing system. The article of manufacture may be used in a method for processing a substrate, comprising positioning the substrate in an electrolyte solution containing a polishing article, optionally depositing a material on the substrate by an electrochemical deposition method, and polishing the substrate with the polishing article.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: June 13, 2006
    Assignee: Applied Materials
    Inventors: Shijian Li, Llang-Yuh Chen, Alain Duboust
  • Patent number: 7060606
    Abstract: Methods and apparatus for processing substrates to improve polishing uniformity, improve planarization, remove residual material and minimize defect formation are provided. In one aspect, a method is provided for processing a substrate having a conductive material and a low dielectric constant material disposed thereon including polishing a substrate at a polishing pressures of about 2 psi or less and at platen rotational speeds of about 200 cps or greater. The polishing process may use an abrasive-containing polishing composition having up to about 1 wt. % of abrasives. The polishing process may be integrated into a multi-step polishing process.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: June 13, 2006
    Assignee: Applied Materials Inc.
    Inventors: Stan D. Tsai, Liang-Yuh Chen, Lizhong Sun, Shijian Li, Feng Q. Liu, Rashid Mavliev, Ratson Morad, Daniel A. Carl
  • Publication number: 20060097219
    Abstract: A chemical-mechanical polishing composition that includes less than about 1% wt. abrasive, an additive, and water, where a weigh percent of the additive is greater than a weight percent of the abrasive. Also, a method of polishing a semiconductor substrate in a shallow trench isolation process, the method including contacting the substrate with a polishing pad of a polishing apparatus while applying a high selectivity slurry to the polishing pad, where the slurry comprises less than about 1% wt. abrasive, an additive, and water, and where a weigh percent of the additive is greater than a weight percent of the abrasive. Also, a method of making a chemical-mechanical polishing slurry composition, the method including adding together an abrasive, an additive and water to form the slurry, where a weigh percent of the additive is greater than a weight percent of the abrasive, and the abrasive and additive together comprise less than 2% by wt. of the slurry.
    Type: Application
    Filed: October 24, 2005
    Publication date: May 11, 2006
    Applicant: Applied Materials, Inc.
    Inventors: Benjamin Bonner, Anand Iyer, Olivier Nguyen, Donald Chua, Christopher Lee, Shijian Li
  • Patent number: 7041599
    Abstract: High through-put Cu CMP is achieved with reduced erosion and dishing by a multi-step polishing technique. Deposited Cu is polished with fixed abrasive polishing pads initially at a high removal rate and subsequently at a reduced removal rate and high Cu:barrier layer (Ta) selectivity. Embodiments of the present invention include reducing dishing by: controlling platen rotating speeds; increasing the concentration of active chemicals; and cleaning the polishing pads between wafers. Embodiments also include removing particulate material during CMP by increasing the flow rate of the chemical agent or controlling the static etching rate between about 100 ? and about 150 ? per minute, and recycling the chemical agent. Embodiments further include flowing an inhibitor across the wafer surface after each CMP step to reduce the static etching rate.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 9, 2006
    Assignee: Applied Materials Inc.
    Inventors: Shijian Li, Fred C. Redeker, John White, Ramin Emami
  • Patent number: 7022608
    Abstract: A method, composition, and computer readable medium for planarizing a substrate. In one aspect, the composition includes one or more chelating agents and ions of at least one transition metal, one or more surfactants, one or more oxidizers, one or more corrosion inhibitors, and deionized water. The composition may further comprise one or more agents to adjust the pH and/or abrasive particles. The method comprises planarizing a substrate using a composition including one or more chelating agents and ions of at least one transition metal.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: April 4, 2006
    Assignee: Applied Materials Inc.
    Inventors: Lizhong Sun, Stan Tsai, Shijian Li
  • Patent number: 7014538
    Abstract: A method and apparatus for using fixed abrasive polishing pads that contain posts for chemical mechanical polishing (CMP). The posts have different shapes, different sizes, different heights, different materials, different distribution of abrasive particles and different process chemicals. This invention also includes preconditioning fixed abrasive articles comprising a plurality of posts so that the posts have equal heights above the backing to achieve a uniform texture. This invention relates to improvements with respect to in situ rate measurement (ISRM) devices. The invention resides in providing a mechanical means, such as a notch, to determine when approaching the end of the abrasive web roll. The invention resides in coding the web throughout its length to enable determining the location of different portions of the web. This invention resides in providing perforations in the sides or end of the web for improved handling.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: March 21, 2006
    Assignee: Applied Materials, Inc.
    Inventors: James V. Tietz, Shijian Li, Manoocher Birang, John M. White, Sandra L. Rosenberg, legal representative, Marty Scales, Ramin Emami, Lawrence M. Rosenberg, deceased
  • Patent number: 7014545
    Abstract: A carrier head for chemical mechanical polishing, includes a base, a support structure attached to the base having a surface for contacting a substrate, and a retaining structure attached to the base to prevent the substrate from moving along the surface. The retaining structure and the surface define a cavity for receiving the substrate. The retaining structure includes an upper portion in contact with the base, a lower portion, and a vibration damper separating the upper portion and the lower portion. The vibration damper, the vibration damper includes a material that does not rebound to its original shape when subjected to a deformation.
    Type: Grant
    Filed: January 10, 2004
    Date of Patent: March 21, 2006
    Assignee: Applied Materials Inc.
    Inventors: Hung Chih Chen, John M. White, Shijian Li, Fred C. Redeker, Ramin Emami
  • Patent number: 7012025
    Abstract: The invention relates generally to a composition and a method for selective removal of a barrier layer in chemical mechanical polishing. In one aspect, the composition for selective removal of a barrier layer includes at least one reducing agent, ions from at least one transitional metal, and water. The composition may further include at least one buffer for pH stability, at least one pH adjusting agent for providing an initial pH, a corrosion inhibitor, abrasive particles, and/or a metal chelating agent. In another embodiment, the invention relates generally to a composition and a method for removal of a conductive material layer and a barrier layer in chemical mechanical polishing.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: March 14, 2006
    Assignee: Applied Materials Inc.
    Inventors: Lizhong Sun, Stan D. Tsai, Shijian Li, Feng Liu
  • Patent number: 7008554
    Abstract: Compositions and methods for removal of barrier layer materials by a chemical mechanical polishing technique are provided. In one aspect, the invention provides a composition adapted for removing a barrier layer material in a chemical mechanical polishing technique including at least one reducing agent selected from the group of bicarboxylic acids, tricarboxylic acids, and combinations thereof, at least one reducing agent selected from the group of glucose, hydroxylamine, and combinations thereof, and deionized water, wherein the composition has a pH of about 7 or less. The composition may be used in a method for removing the barrier layer material including applying the composition to a polishing pad and polishing the substrate in the presence of the composition to remove the barrier layer.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: March 7, 2006
    Assignee: Applied Materials, Inc.
    Inventors: Stan D. Tsai, Shijian Li, Feng Q. Liu, Lizhong Sun, Liang-Yuh Chen