Patents by Inventor Ramakrishnan Ayothi

Ramakrishnan Ayothi 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: 9772558
    Abstract: Provided are chemically amplified resist compositions that include acid-labile sulfonate-ester photoresist polymers that are developable in an organic solvent. The chemically amplified resists produce high resolution positive tone development (PTD) and negative tone development (NTD) images depending on the selection of organic development solvent. Furthermore, the dissolution contrast of the traditional chemically amplified resists may be optimized for dual tone imaging through the addition of a photoresist polymer comprising an acid-labile sulfonate-ester moiety.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: September 26, 2017
    Assignees: International Business Machines Corporation, JSR Corporation
    Inventors: Ramakrishnan Ayothi, Sally A. Swanson, Gregory M. Wallraff
  • Publication number: 20150086925
    Abstract: Provided are chemically amplified resist compositions that include acid-labile sulfonate-ester photoresist polymers that are developable in an organic solvent. The chemically amplified resists produce high resolution positive tone development (PTD) and negative tone development (NTD) images depending on the selection of organic development solvent. Furthermore, the dissolution contrast of the traditional chemically amplified resists may be optimized for dual tone imaging through the addition of a photoresist polymer comprising an acid-labile sulfonate-ester moiety.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicants: JSR CORPORATION, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ramakrishnan Ayothi, Sally A. Swanson, Gregory M. Wallraff
  • Patent number: 8900802
    Abstract: Provided is a method for developing positive-tone chemically amplified resists with an organic developer solvent having at least one polyhydric alcohol, such as ethylene glycol and/or glycerol, alone or in combination with an additional organic solvent, such as isopropyl alcohol, and/or water. The organic solvent developed positive tone resists described herein are useful for lithography pattern forming processes; for producing semiconductor devices, such as integrated circuits (IC); and for applications where basic solvents are not suitable, such as the fabrication of chips patterned with arrays of biomolecules or deprotection applications that do not require the presence of acid moieties.
    Type: Grant
    Filed: February 23, 2013
    Date of Patent: December 2, 2014
    Assignees: International Business Machines Corporation, JSR Corporation
    Inventors: Robert D. Allen, Ramakrishnan Ayothi, Luisa D. Bozano, William D. Hinsberg, Linda K. Sundberg, Sally A. Swanson, Hoa D. Truong, Gregory M. Wallraff
  • Publication number: 20140242526
    Abstract: Provided is a method for developing positive-tone chemically amplified resists with an organic developer solvent having at least one polyhydric alcohol, such as ethylene glycol and/or glycerol, alone or in combination with an additional organic solvent, such as isopropyl alcohol, and/or water. The organic solvent developed positive tone resists described herein are useful for lithography pattern forming processes; for producing semiconductor devices, such as integrated circuits (IC); and for applications where basic solvents are not suitable, such as the fabrication of chips patterned with arrays of biomolecules or deprotection applications that do not require the presence of acid moieties.
    Type: Application
    Filed: February 23, 2013
    Publication date: August 28, 2014
    Applicants: JSR CORPORATION, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert D. Allen, Ramakrishnan Ayothi, Luisa D. Bozano, William D. Hinsberg, Linda K. Sundberg, Sally A. Swanson, Hoa D. Truong, Gregory M. Wallraff
  • Patent number: 8614047
    Abstract: Provided are novel symmetrical and asymmetrical bifunctional photodecomposable bases (PDBs) with dicarboxylate anion groups that show increased imaging performance. Also provided are photoresist compositions prepared with the bifunctional dicarboxylated PDBs and lithography methods that use the photoresist compositions of the present invention.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: December 24, 2013
    Assignees: International Business Machines Corporation, JSR Corporation
    Inventors: Ramakrishnan Ayothi, William D. Hinsberg, Sally A. Swanson, Gregory M. Wallraff
  • Publication number: 20130052585
    Abstract: Provided are novel symmetrical and asymmetrical bifunctional photodecomposable bases (PDBs) with dicarboxylate anion groups that show increased imaging performance. Also provided are photoresist compositions prepared with the bifunctional dicarboxylated PDBs and lithography methods that use the photoresist compositions of the present invention.
    Type: Application
    Filed: August 26, 2011
    Publication date: February 28, 2013
    Applicants: JSR CORPORATION, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ramakrishnan Ayothi, William D. Hinsberg, Sally A. Swanson, Gregory M. Wallraff
  • Patent number: 8268531
    Abstract: The invention provides various ionic and non-ionic photoacid generator compounds. Photoresist compositions that include the novel ionic and non-ionic photoacid generator compounds are also provided. The invention further provides methods of making and using the photoacid generator compounds and photoresist compositions disclosed herein. The compounds and compositions are useful as photoactive components in chemically amplified resist compositions for various microfabrication applications.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: September 18, 2012
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Christopher K. Ober, Yi Yi, Ramakrishnan Ayothi
  • Publication number: 20110008732
    Abstract: The invention provides various ionic and non-ionic photoacid generator compounds. Photoresist compositions that include the novel ionic and non-ionic photoacid generator compounds are also provided. The invention further provides methods of making and using the photoacid generator compounds and photoresist compositions disclosed herein. The compounds and compositions are useful as photoactive components in chemically amplified resist compositions for various microfabrication applications.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 13, 2011
    Applicant: Cornell Research Foundation, Inc.
    Inventors: Christopher K. Ober, Yi Yi, Ramakrishnan Ayothi
  • Patent number: 7824839
    Abstract: The invention provides various ionic and non-ionic photoacid generator compounds. Photoresist compositions that include the novel ionic and non-ionic photoacid generator compounds are also provided. The invention further provides methods of making and using the photoacid generator compounds and photoresist compositions disclosed herein. The compounds and compositions are useful as photoactive components in chemically amplified resist compositions for various microfabrication applications.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: November 2, 2010
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Christopher K. Ober, Yi Yi, Ramakrishnan Ayothi
  • Publication number: 20090136868
    Abstract: The invention provides various ionic and non-ionic photoacid generator compounds. Photoresist compositions that include the novel ionic and non-ionic photoacid generator compounds are also provided. The invention further provides methods of making and using the photoacid generator compounds and photoresist compositions disclosed herein. The compounds and compositions are useful as photoactive components in chemically amplified resist compositions for various microfabrication applications.
    Type: Application
    Filed: October 21, 2008
    Publication date: May 28, 2009
    Inventors: Christopher K. Ober, Yi Yi, Ramakrishnan Ayothi
  • Publication number: 20090098490
    Abstract: The present invention is directed to novel radiation-sensitive, wet developable bottom antireflective coating (DBARC) compositions and their use in semiconductor device manufacturing. The DBARC compositions contain a photoacid generator that produces a photoacid upon exposure to activating radiation. In a photolithographic imaging process, the relatively strong photoacid reduces or eliminates scumming. Further, the relatively large size of the photoacid limits its diffusion through the DBARC, thus minimizing or preventing undercut. The inventive method also limits diffusion of the photoacid by controlling the temperature of the post-exposure baking step. Use of the DBARC compositions with a photoresist in photolithography results in highly resolved features having essentially vertical profiles and no scumming and no undercut, which is critical as microelectronics and semiconductor components become increasingly miniaturized.
    Type: Application
    Filed: October 16, 2007
    Publication date: April 16, 2009
    Inventors: Victor Pham, Ramakrishnan Ayothi, Mark Slezak
  • Publication number: 20080227032
    Abstract: Novel classes of ionic photoacid generator (PAGs) compounds having relatively environmentally friendly anions with no perfluorooctyl sulfonate (no-PFOS) are provided and photoresist composition that comprise such compounds. The new PAGs produce a photoacid having a short or no perfluoro alkyl chain (i.e., no-PFOS) attached to a variety of functional groups. The PAGs of the invention are useful as photoactive component in the chemically amplified resist compositions used for microfabrication.
    Type: Application
    Filed: May 29, 2008
    Publication date: September 18, 2008
    Applicant: Cornell Research Foundation, Inc.
    Inventors: Christopher K. Ober, Ramakrishnan Ayothi, Kyung-Min Kim, Xiang-Qian Liu
  • Patent number: 7393627
    Abstract: Novel classes of ionic photoacid generator (PAGs) compounds having relatively environmentally friendly anions with no perfluorooctyl sulfonate (no-PFOS) are provided and photoresist composition that comprise such compounds. The new PAGs produce a photoacid having a short or no perfluoro alkyl chain (ie., no-PFOS) attached to a variety of functional groups. The PAGs of the invention are useful as photoactive component in the chemically amplified resist compositions used for microfabrication.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: July 1, 2008
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Christopher K. Ober, Ramakrishnan Ayothi, Kyung-Min Kim, Xiang-Qian Liu
  • Publication number: 20050208420
    Abstract: Novel classes of ionic photoacid generator (PAGs) compounds having relatively environmentally friendly anions with no perfluorooctyl sulfonate (no-PFOS) are provided and photoresist composition that comprise such compounds. The new PAGs produce a photoacid having a short or no perfluoro alkyl chain (ie., no-PFOS) attached to a variety of functional groups. The PAGs of the invention are useful as photoactive component in the chemically amplified resist compositions used for microfabrication.
    Type: Application
    Filed: March 16, 2005
    Publication date: September 22, 2005
    Inventors: Christopher Ober, Ramakrishnan Ayothi, Kyung-Min Kim, Xiang-Qian Liu