Patents by Inventor Martha M. Rajaratnam

Martha M. Rajaratnam 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: 9443713
    Abstract: An oxidizing aqueous cleaning composition and process for cleaning post-plasma etch residue and/or hardmask material from a microelectronic device having said residue thereon. The oxidizing aqueous cleaning composition includes at least one oxidizing agent, at least one oxidizing agent stabilizer comprising an amine species selected from the group consisting of primary amines, secondary amines, tertiary amines and amine-N-oxides, optionally at least one co-solvent, optionally at least one metal-chelating agent, optionally at least one buffering species, and water. The composition achieves highly efficacious cleaning of the residue material from the microelectronic device while simultaneously not damaging the interlevel dielectric and metal interconnect material also present thereon.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: September 13, 2016
    Assignee: ADVANCED TECHNOLOGY MATERIALS, INC.
    Inventors: David W. Minsek, Michael B. Korzenski, Martha M. Rajaratnam
  • Publication number: 20150000697
    Abstract: An oxidizing aqueous cleaning composition and process for cleaning post-plasma etch residue and/or hardmask material from a microelectronic device having said residue thereon. The oxidizing aqueous cleaning composition includes at least one oxidizing agent, at least one oxidizing agent stabilizer comprising an amine species selected from the group consisting of primary amines, secondary amines, tertiary amines and amine-N-oxides, optionally at least one co-solvent, optionally at least one metal-chelating agent, optionally at least one buffering species, and water. The composition achieves highly efficacious cleaning of the residue material from the microelectronic device while simultaneously not damaging the interlevel dielectric and metal interconnect material also present thereon.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 1, 2015
    Inventors: David W. Minsek, Michael B. Korzenski, Martha M. Rajaratnam
  • Patent number: 8765654
    Abstract: An oxidizing aqueous cleaning composition and process for cleaning post-plasma etch residue and/or hardmask material from a microelectronic device having said residue thereon. The oxidizing aqueous cleaning composition includes at least one oxidizing agent, at least one oxidizing agent stabilizer comprising an amine species selected from the group consisting of primary amines, secondary amines, tertiary amines and amine-N-oxides, optionally at least one co-solvent, optionally at least one metal-chelating agent, optionally at least one buffering species, and water. The composition achieves highly efficacious cleaning of the residue material from the microelectronic device while simultaneously not damaging the interlevel dielectric and metal interconnect material also present thereon.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: July 1, 2014
    Assignee: Advanced Technology Materials, Inc.
    Inventors: David W. Minsek, Michael B. Korzenski, Martha M. Rajaratnam
  • Publication number: 20110186086
    Abstract: An oxidizing aqueous cleaning composition and process for cleaning post-plasma etch residue and/or hardmask material from a microelectronic device having said residue thereon. The oxidizing aqueous cleaning composition includes at least one oxidizing agent, at least one oxidizing agent stabilizer comprising an amine species selected from the group consisting of primary amines, secondary amines, tertiary amines and amine-N-oxides, optionally at least one co-solvent, optionally at least one metal-chelating agent, optionally at least one buffering species, and water. The composition achieves highly efficacious cleaning of the residue material from the microelectronic device while simultaneously not damaging the interlevel dielectric and metal interconnect material also present thereon.
    Type: Application
    Filed: April 11, 2011
    Publication date: August 4, 2011
    Applicant: ADVANCED TECHNOLOGY MATERIALS, INC.
    Inventors: David W. Minsek, Michael B. Korzenski, Martha M. Rajaratnam
  • Patent number: 7922824
    Abstract: An oxidizing aqueous cleaning composition and process for cleaning post-plasma etch residue and/or hardmask material from a microelectronic device having said residue thereon. The oxidizing aqueous cleaning composition includes at least one oxidizing agent, at least one oxidizing agent stabilizer comprising an amine species selected from the group consisting of primary amines, secondary amines, tertiary amines and amine-N-oxides, optionally at least one co-solvent, optionally at least one metal-chelating agent, optionally at least one buffering species, and water. The composition achieves highly efficacious cleaning of the residue material from the microelectronic device while simultaneously not damaging the interlevel dielectric and metal interconnect material also present thereon.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: April 12, 2011
    Assignee: Advanced Technology Materials, Inc.
    Inventors: David W. Minsek, Michael B. Korzenski, Martha M. Rajaratnam
  • Publication number: 20090215658
    Abstract: An oxidizing aqueous cleaning composition and process for cleaning post-plasma etch residue and/or hardmask material from a microelectronic device having said residue thereon. The oxidizing aqueous cleaning composition includes at least one oxidizing agent, at least one oxidizing agent stabilizer comprising an amine species selected from the group consisting of primary amines, secondary amines, tertiary amines and amine-N-oxides, optionally at least one co-solvent, optionally at least one metal-chelating agent, optionally at least one buffering species, and water. The composition achieves highly efficacious cleaning of the residue material from the microelectronic device while simultaneously not damaging the interlevel dielectric and metal interconnect material also present thereon.
    Type: Application
    Filed: October 4, 2006
    Publication date: August 27, 2009
    Applicant: ADVANCED TECHNOLOGY MATERIALS, INC.
    Inventors: David W. Minsek, Michael B. Korzenski, Martha M. Rajaratnam
  • Publication number: 20090032766
    Abstract: A gate spacer oxide material removal composition and process for at least partial removal of gate spacer oxide material from a microelectronic device having same thereon. The anhydrous removal composition includes at least one organic solvent, at least one chelating agent, a base fluoride:acid fluoride component, and optionally at least one passivator. The composition achieves the selective removal of gate spacer oxide material relative to polysilicon and silicon nitride from the vicinity of the gate electrode on the surface of the microelectronic device with minimal etching of metal silicide interconnect material species employed in the gate electrode architecture.
    Type: Application
    Filed: October 4, 2006
    Publication date: February 5, 2009
    Applicant: ADVANCED TECHNOLOGY MATERIALS, INC.
    Inventors: Martha M. Rajaratnam, David D. Bernhard, David W. Minsek
  • Publication number: 20020012869
    Abstract: The invention provides novel cross-linked polymers and positive chemically-amplified photoresist compositions that comprise a photoactive component and such crosslinked polymers. Resists of the invention can exhibit enhanced lithographic results relative to comparable compositions where the polymers are not crosslinked.
    Type: Application
    Filed: February 9, 2001
    Publication date: January 31, 2002
    Applicant: Shipley Company, L.L.C.
    Inventors: Timothy G. Adams, Martha M. Rajaratnam, Ashish A. Pandya, Roger F. Sinta, Pushkara R. Varanasi, Kathleen Cornett, Ahmad D. Katnani
  • Patent number: 6048672
    Abstract: The invention includes use of a positive chemically amplified photoresist composition that produces a strong photogenerated acid. The resist is coated onto a metal substrate that has been subjected to a stringent bake step, e.g. heating of the substrate at about at least 140.degree. C. for more than 60 seconds. The combined use of strong photogenerated acid and stringent pre-coating substrate bake provides highly resolved resist relief images, including on metal substrates.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: April 11, 2000
    Assignee: Shipley Company, L.L.C.
    Inventors: James F. Cameron, Martha M. Rajaratnam, Roger F. Sinta, James W. Thackeray
  • Patent number: 5731364
    Abstract: The invention provides positive- and negative-acting a photoresist compositions that contain a photoacid generator component that includes multiple aryl sulfonium compounds. Specifically, the photoactive component contains at least one multiple cation aryl sulfonium compound, preferably a di-cation compound. The photoactive component of the resists of the invention can be conveniently prepared and provide a deep UV sensitive resist with excellent microlithographic properties.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: March 24, 1998
    Assignee: Shipley Company, L.L.C.
    Inventors: Roger F. Sinta, James F. Cameron, Timothy G. Adams, Martha M. Rajaratnam, Michael F. Cronin
  • Patent number: 5362600
    Abstract: The invention provides a radiation sensitive composition having a polymer binder of phenolic and cyclic alcohol units. At least a portion of the phenolic units and/or cyclic alcohol units of the polymer are bonded to acid labile groups. High solubility differentials between exposed and unexposed regions are realized with only moderate substitution of the binder with the acid labile groups.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: November 8, 1994
    Assignee: Shipley Company Inc.
    Inventors: Roger Sinta, Richard C. Hemond, David R. Medeiros, Martha M. Rajaratnam, James W. Thackeray, Dianne Canistro
  • Patent number: 5344742
    Abstract: The present invention comprises certain benzyl-substituted photoactive compounds and photoresist compositions comprising such photoactive compounds. The benzyl-substituted photoactive compounds of the invention are particularly suitable as the photoactive component in chemically amplified positive-acting and negative-acting compositions.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: September 6, 1994
    Assignee: Shipley Company Inc.
    Inventors: Roger F. Sinta, George Barclay, Martha M. Rajaratnam
  • Patent number: 5258257
    Abstract: The invention provides a radiation sensitive composition having a polymer binder of phenolic and cyclic alcohol units. At least a portion of the phenolic units and/or cyclic alcohol units of the polymer are bonded to acid labile groups. High solubility differentials between exposed and unexposed regions are realized with only moderate substitution of the binder with the acid labile groups.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: November 2, 1993
    Assignee: Shipley Company Inc.
    Inventors: Roger Sinta, Richard C. Hemond, David R. Medeiros, Martha M. Rajaratnam, James W. Thackeray, Dianne Canistro