Patents by Inventor Anita Madan

Anita Madan 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: 7769134
    Abstract: In a method for use of x-ray diffraction to measure the strain on the top silicon germanium layer of an SOI substrate, the location of the peak diffraction area of an upper silicon layer of the SOI substrate is determined by first determining the peak diffraction area of the upper silicon layer on a reference pad (where the SOI thickness is about 700-900 Angstroms) within a die formed on a semiconductor wafer. The x-ray beam then moves to that location on the pad of interest to be measured and begins the XRD scan on the pad of interest to ultimately determine the strain of the top silicon germanium layer of the pad of interest.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: August 3, 2010
    Assignee: International Business Machines Corporation
    Inventors: Thomas N. Adam, Eric C. Harley, Anita Madan, Teresa L. Pinto
  • Publication number: 20100081259
    Abstract: A method for generating patterned strained regions in a semiconductor device is provided. The method includes directing a light-emitting beam locally onto a surface portion of a semiconductor body; and manipulating a plurality of dislocations located proximate to the surface portion of the semiconductor body utilizing the light-emitting beam, the light-emitting beam being characterized as having a scan speed, so as to produce the patterned strained regions.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 1, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chung Woh Lai, Xiao Hu Liu, Anita Madan, Klaus W. Schwarz, J. Campbell Scott
  • Patent number: 7622386
    Abstract: A method of forming silicide contacts for semiconductor devices includes subjecting a silicon containing semiconductor wafer to a degas treatment at an initial degas temperature of about 250 to about 400° C., transferring the semiconductor wafer from a degas chamber to a deposition chamber, depositing a nickel containing layer over the wafer following transfer of the wafer from the degas chamber to the deposition chamber, and annealing the semiconductor wafer so as to create silicide regions at portions on the wafer where nickel material is formed over silicon.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: November 24, 2009
    Assignees: International Business Machines Corporation, Samsung Electronics Co., Ltd.
    Inventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong, Jun-Keun Kwak
  • Publication number: 20090146181
    Abstract: An integrated circuit system that includes: providing a PFET device including a doped epitaxial layer; and forming a source/drain extension by employing an energy source to diffuse a dopant from the doped epitaxial layer.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 11, 2009
    Applicants: CHARTERED SEMICONDUCTOR MANUFACTURING LTD., INTERNATIONAL BUSINESS MACHINES CORPORATION, SAMSUNG, INFINEON TECHNOLOGIES NORTH AMERICA CORPORATION
    Inventors: Chung Woh Lai, Oleg Gluschenkov, Henry K. Utomo, Lee Wee Teo, Jin Ping Liu, Anita Madan, Rainer Loesing, Jin-Ping Han, Hyung-Yoon Choi
  • Patent number: 7491660
    Abstract: A method is provided for making a FET device in which a nitride layer overlies the PFET gate structure, where the nitride layer has a compressive stress with a magnitude greater than about 2.8 GPa. This compressive stress permits improved device performance in the PFET. The nitride layer is deposited using a high-density plasma (HDP) process, wherein the substrate is disposed on an electrode to which a bias power in the range of about 50 W to about 500 W is supplied. The bias power is characterized as high-frequency power (supplied by an RF generator at 13.56 MHz). The FET device may also include NFET gate structures. A blocking layer is deposited over the NFET gate structures so that the nitride layer overlies the blocking layer; after the blocking layer is removed, the nitride layer is not in contact with the NFET gate structures. The nitride layer has a thickness in the range of about 300-2000 ?.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: February 17, 2009
    Assignees: International Business Machines Corporation, Novellus Systems. Inc.
    Inventors: Richard A. Conti, Ronald P. Bourque, Nancy R. Klymko, Anita Madan, Michael C. Smits, Roy H. Tilghman, Kwong Hon Wong, Daewon Yang
  • Patent number: 7485572
    Abstract: A method of forming silicide contacts for semiconductor devices includes subjecting a silicon containing semiconductor wafer to a degas treatment at a temperature of about 400° C., transferring the semiconductor wafer from a degas chamber to a deposition chamber, depositing a cobalt layer over the wafer at a point in time when the semiconductor wafer has cooled to temperature range of about 275-300° C., depositing a cap layer over the cobalt layer, and annealing the semiconductor wafer so as to create silicide contacts at portions on the wafer where cobalt is formed over silicon.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: February 3, 2009
    Assignee: International Business Machines Corporation
    Inventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong
  • Patent number: 7473608
    Abstract: The present invention relates to a semiconductor device comprising at least one n-channel field effect transistor (n-FET). Specifically, the n-FET comprises first and second patterned stressor layers that both contain a carbon-substituted and tensilely stressed single crystal semiconductor. The first patterned stressor layer has a first carbon concentration and is located in source and drain (S/D) extension regions of the n-FET at a first depth. The second patterned stressor layer has a second, higher carbon concentration and is located in S/D regions of the n-FET at a second, deeper depth. Such an n-FET with the first and second patterned stressor layers of different carbon concentration and different depths provide improved stress profile for enhancing electron mobility in the channel region of the n-FET.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: January 6, 2009
    Assignee: International Business Machines Corporation
    Inventors: Jinghong H. Li, Yaocheng Liu, Zhijiong Luo, Anita Madan, Nivo Rovedo
  • Patent number: 7462527
    Abstract: A method is provided for making a FET device in which a nitride layer overlies the PFET gate structure, where the nitride layer has a compressive stress with a magnitude greater than about 2.8 GPa. This compressive stress permits improved device performance in the PFET. The nitride layer is deposited using a high-density plasma (HDP) process, wherein the substrate is disposed on an electrode to which a bias power in the range of about 50 W to about 500 W is supplied. The bias power is characterized as high-frequency power (supplied by an RF generator at 13.56 MHz). The FET device may also include NFET gate structures. A blocking layer is deposited over the NFET gate structures so that the nitride layer overlies the blocking layer; after the blocking layer is removed, the nitride layer is not in contact with the NFET gate structures. The nitride layer has a thickness in the range of about 300-2000 ?.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: December 9, 2008
    Assignees: International Business Machines Corporation, Novellus Systems, Inc.
    Inventors: Richard A. Conti, Ronald P. Bourque, Nancy R. Klymko, Anita Madan, Michael C. Smits, Roy H. Tilghman, Kwong Hon Wong, Daewon Yang
  • Patent number: 7407875
    Abstract: Embodiments of the present invention provide a method of fabricating a contact structure in a layer of dielectric material between a semiconductor device and a back-end-of-line interconnect. The method includes creating at least one contact opening in said layer of dielectric material; forming a first TiN film through a chemical-vapor deposition process, said first TiN film lining said contact opening; and forming a second TiN film through a physical vapor deposition process, said second TiN film lining said first TiN film. A contact structure fabricated according to embodiments of the invention is also provided.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: August 5, 2008
    Assignee: International Business Machines Corporation
    Inventors: Keith Kwong Hon Wong, Patrick W. DeHaven, Sadanand V. Deshpande, Anita Madan
  • Publication number: 20080138985
    Abstract: A method of forming silicide contacts for semiconductor devices includes subjecting a silicon containing semiconductor wafer to a degas treatment at an initial degas temperature of about 250 to about 400° C., transferring the semiconductor wafer from a degas chamber to a deposition chamber, depositing a nickel containing layer over the wafer following transfer of the wafer from the degas chamber to the deposition chamber, and annealing the semiconductor wafer so as to create silicide regions at portions on the wafer where nickel material is formed over silicon.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 12, 2008
    Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong, Jun-Keun Kwak
  • Publication number: 20080124925
    Abstract: A method of forming silicide contacts for semiconductor devices includes subjecting a silicon containing semiconductor wafer to a degas treatment at a temperature of about 400° C., transferring the semiconductor wafer from a degas chamber to a deposition chamber, depositing a cobalt layer over the wafer at a point in time when the semiconductor wafer has cooled to temperature range of about 275-300° C., depositing a cap layer over the cobalt layer, and annealing the semiconductor wafer so as to create silicide contacts at portions on the wafer where cobalt is formed over silicon.
    Type: Application
    Filed: September 25, 2006
    Publication date: May 29, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong
  • Publication number: 20080121926
    Abstract: An integrated circuit system includes a substrate, a carbon-containing silicon region over the substrate, a non-carbon-containing silicon region over the substrate, and a silicon-carbon region, including the non-carbon-containing silicon region and the carbon-containing silicon region.
    Type: Application
    Filed: August 15, 2006
    Publication date: May 29, 2008
    Applicants: Chartered Semiconductor Manufacturing Ltd., International Business Machines Corporation
    Inventors: Jin Ping Liu, Richard J. Murphy, Anita Madan, Ashima B. Chakravarti
  • Publication number: 20080054326
    Abstract: Embodiments of the present invention provide a method of fabricating a contact structure in a layer of dielectric material between a semiconductor device and a back-end-of-line interconnect. The method includes creating at least one contact opening in said layer of dielectric material; forming a first TiN film through a chemical-vapor deposition process, said first TiN film lining said contact opening; and forming a second TiN film through a physical vapor deposition process, said second TiN film lining said first TiN film. A contact structure fabricated according to embodiments of the invention is also provided.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 6, 2008
    Applicant: International Business Machines Corporation
    Inventors: Keith Kwong Hon Wong, Patrick W. DeHaven, Sadanand V. Deshpande, Anita Madan
  • Publication number: 20080045039
    Abstract: A method is provided for making a FET device in which a nitride layer overlies the PFET gate structure, where the nitride layer has a compressive stress with a magnitude greater than about 2.8 GPa. This compressive stress permits improved device performance in the PFET. The nitride layer is deposited using a high-density plasma (HDP) process, wherein the substrate is disposed on an electrode to which a bias power in the range of about 50 W to about 500 W is supplied. The bias power is characterized as high-frequency power (supplied by an RF generator at 13.56 MHz). The FET device may also include NFET gate structures. A blocking layer is deposited over the NFET gate structures so that the nitride layer overlies the blocking layer; after the blocking layer is removed, the nitride layer is not in contact with the NFET gate structures. The nitride layer has a thickness in the range of about 300-2000 ?.
    Type: Application
    Filed: October 17, 2007
    Publication date: February 21, 2008
    Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, NOVELLUS SYSTEMS, INC.
    Inventors: Richard Conti, Ronald Bourque, Nancy Klymko, Anita Madan, Michael Smits, Roy Tilghman, Kwong Wong, Daewon Yang
  • Publication number: 20080036007
    Abstract: A method is provided for making a FET device in which a nitride layer overlies the PFET gate structure, where the nitride layer has a compressive stress with a magnitude greater than about 2.8 GPa. This compressive stress permits improved device performance in the PFET. The nitride layer is deposited using a high-density plasma (HDP) process, wherein the substrate is disposed on an electrode to which a bias power in the range of about 50 W to about 500 W is supplied. The bias power is characterized as high-frequency power (supplied by an RF generator at 13.56 MHz). The FET device may also include NFET gate structures. A blocking layer is deposited over the NFET gate structures so that the nitride layer overlies the blocking layer; after the blocking layer is removed, the nitride layer is not in contact with the NFET gate structures. The nitride layer has a thickness in the range of about 300-2000 ?.
    Type: Application
    Filed: October 19, 2007
    Publication date: February 14, 2008
    Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, NOVELLUS SYSTEMS, INC.
    Inventors: Richard Conti, Ronald Bourque, Nancy Klymko, Anita Madan, Michael Smits, Roy Tilghman, Kwong Wong, Daewon Yang
  • Publication number: 20070281413
    Abstract: The present invention relates to a semiconductor device comprising at least one n-channel field effect transistor (n-FET). Specifically, the n-FET comprises first and second patterned stressor layers that both contain a carbon-substituted and tensilely stressed single crystal semiconductor. The first patterned stressor layer has a first carbon concentration and is located in source and drain (S/D) extension regions of the n-FET at a first depth. The second patterned stressor layer has a second, higher carbon concentration and is located in S/D regions of the n-FET at a second, deeper depth. Such an n-FET with the first and second patterned stressor layers of different carbon concentration and different depths provide improved stress profile for enhancing electron mobility in the channel region of the n-FET.
    Type: Application
    Filed: August 17, 2007
    Publication date: December 6, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Jinghong Li, Yaocheng Liu, Zhijiong Luo, Anita Madan, Nivo Rovedo
  • Publication number: 20070238267
    Abstract: Expitaxial substitutional solid solutions of silicon carbon can be obtained by an ultrafast anneal of an amorphous carbon-containing silicon material. The anneal is performed at a temperature above the recrystallization point, but below the melting point of the material and preferably lasts for less than 100 milliseconds in this temperature regime. The anneal is preferably a flash anneal or laser anneal. This approach is able to produce epitaxial silicon and carbon-containing materials with a substantial portion of the carbon atoms at substitutional lattice positions. The approach is especially useful in CMOS processes and other electronic device manufacture where the presence of epitaxial Si1?yCy, y<0.1 is desired for strain engineering or bandgap engineering.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 11, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Yaocheng Liu, Oleg Gluschenkov, Anita Madan, Kern Rim, Judson Holt
  • Patent number: 7279758
    Abstract: The present invention relates to a semiconductor device including at least one n-channel field effect transistor (n-FET). Specifically, the n-FET includes first and second patterned stressor layers that both contain a carbon-substituted and tensilely stressed single crystal semiconductor. The first patterned stressor layer has a first carbon concentration and is located in source and drain (S/D) extension regions of the n-FET at a first depth. The second patterned stressor layer has a second, higher carbon concentration and is located in S/D regions of the n-FET at a second, deeper depth. Such an n-FET with the first and second patterned stressor layers of different carbon concentration and different depths provide improved stress profile for enhancing electron mobility in the channel region of the n-FET.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: October 9, 2007
    Assignee: International Business Machines Corporation
    Inventors: Jinghong H. Li, Yaocheng Liu, Zhijiong Luo, Anita Madan, Nivo Rovedo
  • Publication number: 20070224824
    Abstract: When an interconnect structure is built on porous ultra low k (ULK) material, the bottom and/or sidewall of the trench and/or via is usually damaged by a following metallization or cleaning process which may be suitable for dense higher dielectric materials. Embodiments of the present invention may provide a method of repairing process induced dielectric damage from forming an interconnect structure on an inter-layer dielectric (ILD) material. The method includes treating an exposed area of the ILD material to create a carbon-rich area, and metallizing the carbon-rich area. One embodiment includes providing treatment to an exposed sidewall area of the ILD material to create a carbon-rich area by irradiating the exposed area using a gas cluster ion beam (GCIB) generated through a gas including a straight chain or branched, aliphatic or aromatic hydrocarbon, and metallizing the carbon-rich area.
    Type: Application
    Filed: December 11, 2006
    Publication date: September 27, 2007
    Applicant: International Business Machines Corporation
    Inventors: Shyng-Tsong Chen, Nancy R. Klymko, Anita Madan, Sanjay Mehta, Steven E. Molis
  • Patent number: 7232774
    Abstract: A method of forming polycrystalline silicon with ultra-small grain sizes employs a differential heating of the upper and lower sides of the substrate of a CVD apparatus, in which the lower side of the substrate receives considerably more power than the upper side, preferable more than 75% of the power; and in which the substrate is maintained during deposition at a temperature more than 50° C. above the 550° C. crystallization temperature of silicon.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: June 19, 2007
    Assignee: International Business Machines Corporation
    Inventors: Ashima B. Chakravarti, Bruce B. Doris, Romany Ghali, Oleg G. Gluschenkov, Michael A. Gribelyuk, Woo-Hyeong Lee, Anita Madan