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).
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Patent number: 7769134Abstract: 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: GrantFiled: February 17, 2009Date of Patent: August 3, 2010Assignee: International Business Machines CorporationInventors: Thomas N. Adam, Eric C. Harley, Anita Madan, Teresa L. Pinto
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Publication number: 20100081259Abstract: 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: ApplicationFiled: October 1, 2008Publication date: April 1, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Chung Woh Lai, Xiao Hu Liu, Anita Madan, Klaus W. Schwarz, J. Campbell Scott
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Patent number: 7622386Abstract: 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: GrantFiled: December 6, 2006Date of Patent: November 24, 2009Assignees: International Business Machines Corporation, Samsung Electronics Co., Ltd.Inventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong, Jun-Keun Kwak
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Publication number: 20090146181Abstract: 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: ApplicationFiled: December 7, 2007Publication date: June 11, 2009Applicants: CHARTERED SEMICONDUCTOR MANUFACTURING LTD., INTERNATIONAL BUSINESS MACHINES CORPORATION, SAMSUNG, INFINEON TECHNOLOGIES NORTH AMERICA CORPORATIONInventors: Chung Woh Lai, Oleg Gluschenkov, Henry K. Utomo, Lee Wee Teo, Jin Ping Liu, Anita Madan, Rainer Loesing, Jin-Ping Han, Hyung-Yoon Choi
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Patent number: 7491660Abstract: 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: GrantFiled: October 17, 2007Date of Patent: February 17, 2009Assignees: 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
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Patent number: 7485572Abstract: 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: GrantFiled: September 25, 2006Date of Patent: February 3, 2009Assignee: International Business Machines CorporationInventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong
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Patent number: 7473608Abstract: 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: GrantFiled: August 17, 2007Date of Patent: January 6, 2009Assignee: International Business Machines CorporationInventors: Jinghong H. Li, Yaocheng Liu, Zhijiong Luo, Anita Madan, Nivo Rovedo
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Patent number: 7462527Abstract: 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: GrantFiled: July 6, 2005Date of Patent: December 9, 2008Assignees: 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
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Patent number: 7407875Abstract: 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: GrantFiled: September 6, 2006Date of Patent: August 5, 2008Assignee: International Business Machines CorporationInventors: Keith Kwong Hon Wong, Patrick W. DeHaven, Sadanand V. Deshpande, Anita Madan
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Publication number: 20080138985Abstract: 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: ApplicationFiled: December 6, 2006Publication date: June 12, 2008Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, SAMSUNG ELECTRONICS CO., LTD.Inventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong, Jun-Keun Kwak
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Publication number: 20080124925Abstract: 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: ApplicationFiled: September 25, 2006Publication date: May 29, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Anita Madan, Robert J. Purtell, Keith Kwong Hon Wong
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Publication number: 20080121926Abstract: 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: ApplicationFiled: August 15, 2006Publication date: May 29, 2008Applicants: Chartered Semiconductor Manufacturing Ltd., International Business Machines CorporationInventors: Jin Ping Liu, Richard J. Murphy, Anita Madan, Ashima B. Chakravarti
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Publication number: 20080054326Abstract: 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: ApplicationFiled: September 6, 2006Publication date: March 6, 2008Applicant: International Business Machines CorporationInventors: Keith Kwong Hon Wong, Patrick W. DeHaven, Sadanand V. Deshpande, Anita Madan
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Publication number: 20080045039Abstract: 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: ApplicationFiled: October 17, 2007Publication date: February 21, 2008Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, NOVELLUS SYSTEMS, INC.Inventors: Richard Conti, Ronald Bourque, Nancy Klymko, Anita Madan, Michael Smits, Roy Tilghman, Kwong Wong, Daewon Yang
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Publication number: 20080036007Abstract: 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: ApplicationFiled: October 19, 2007Publication date: February 14, 2008Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION, NOVELLUS SYSTEMS, INC.Inventors: Richard Conti, Ronald Bourque, Nancy Klymko, Anita Madan, Michael Smits, Roy Tilghman, Kwong Wong, Daewon Yang
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Publication number: 20070281413Abstract: 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: ApplicationFiled: August 17, 2007Publication date: December 6, 2007Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jinghong Li, Yaocheng Liu, Zhijiong Luo, Anita Madan, Nivo Rovedo
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Publication number: 20070238267Abstract: 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: ApplicationFiled: March 28, 2006Publication date: October 11, 2007Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Yaocheng Liu, Oleg Gluschenkov, Anita Madan, Kern Rim, Judson Holt
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Patent number: 7279758Abstract: 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: GrantFiled: May 24, 2006Date of Patent: October 9, 2007Assignee: International Business Machines CorporationInventors: Jinghong H. Li, Yaocheng Liu, Zhijiong Luo, Anita Madan, Nivo Rovedo
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Publication number: 20070224824Abstract: 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: ApplicationFiled: December 11, 2006Publication date: September 27, 2007Applicant: International Business Machines CorporationInventors: Shyng-Tsong Chen, Nancy R. Klymko, Anita Madan, Sanjay Mehta, Steven E. Molis
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Patent number: 7232774Abstract: 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: GrantFiled: January 20, 2004Date of Patent: June 19, 2007Assignee: International Business Machines CorporationInventors: Ashima B. Chakravarti, Bruce B. Doris, Romany Ghali, Oleg G. Gluschenkov, Michael A. Gribelyuk, Woo-Hyeong Lee, Anita Madan