Patents by Inventor Munirathna Padmanaban

Munirathna Padmanaban 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: 8632948
    Abstract: The invention relates to a photoimageable antireflective coating composition capable of forming a pattern by development in an aqueous alkaline solution, comprising, (i) a polymer A soluble in a coating solvent and comprises a chromophore, a crosslinking moiety, and optionally a cleavable group which under acid or thermal conditions produces a functionality which aids in the solubility of the polymer in an aqueous alkaline solution and; (ii) at least one photoacid generator; (iii) a crosslinking agent; (iv) optionally, a thermal acid generator; (v) a polymer B which is soluble in an aqueous alkaline solution prior to development, where polymer B is non-miscible with polymer A and soluble in the coating solvent, and; (vi) a coating solvent composition, and (vii) optionally, a quencher. The invention also relates to a process for imaging the antireflective coating.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: January 21, 2014
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani, Francis M. Houlihan, Shinji Miyazaki, Edward Ng, Mark O. Neisser
  • Patent number: 8623589
    Abstract: The present invention relates to an antireflective coating composition comprising a crosslinking agent, a polymer comprising at least one chromophore group and at least one hydroxyl and/or a carboxyl group, and an additive, further where the additive has structure 1 and comprises at least one arylene-hydroxyl moiety, where Y is selected from an carboxylate anion or sulfonate anion, R1, R2, and R3 are independently selected from unsubstituted C1-C8 alkyl, substituted C1-C8 alkyl, aryl and arylene-hydroxyl; X1, X2, and X3 are independently selected from direct valence bond and C1-C8 alkylene group, and, n=1, 2 or 3. The invention further relates to a process for using the composition.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: January 7, 2014
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Takanori Kudo, Alberto Dioses, Edward Ng, Srinivasan Chakrapani, Munirathna Padmanaban
  • Publication number: 20130157196
    Abstract: The present invention provides a composition for forming a bottom anti-reflective coating, and also provides a photoresist pattern formation method employing that composition. The composition gives a bottom anti-reflective coating used in a lithographic process for manufacturing semiconductor devices, and the coating can be developed with a developing solution for photoresist. The composition contains a solvent, a polymer having a condensed polycyclic aromatic group, and a compound having a maleimide derivative or a maleic anhydride derivative. The composition may further contain a photo acid generator or a crosslinking agent.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Applicant: AZ ELECTRONIC MATERIALS USA CORP.
    Inventors: Shigemasa Nakasugi, Kazuma Yamamoto, Yasushi Akiyama, Shinji Miyazaki, Munirathna Padmanaban, Srinivasan Chakrapani
  • Publication number: 20120308939
    Abstract: The present invention relates to an antireflective coating composition comprising a crosslinking agent, a polymer comprising at least one chromophore group and at least one hydroxyl and/or a carboxyl group, and an additive, further where the additive has structure 1 and comprises at least one arylene-hydroxyl moiety, where Y is selected from an carboxylate anion or sulfonate anion, R1, R2, and R3 are independently selected from unsubstituted C1-C8 alkyl, substituted C1-C8 alkyl, aryl and arylene-hydroxyl; X1, X2, and X3 are independently selected from direct valence bond and C1-C8 alkylene group, and, n=1, 2 or 3. The invention further relates to a process for using the composition.
    Type: Application
    Filed: June 6, 2011
    Publication date: December 6, 2012
    Applicant: AZ ELECTRONIC MATERIALS USA CORP.
    Inventors: Takanori Kudo, Alberto Dioses, Edward Ng, Srinivasan Chakrapani, Munirathna Padmanaban
  • Patent number: 8252503
    Abstract: Photoresist compositions are disclosed.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: August 28, 2012
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Srinivasan Chakrapani, Munirathna Padmanaban, Muthiah Thiyagarajan, Takanori Kudo, David L. Rentkiewicz
  • Publication number: 20120160801
    Abstract: There are provided a composition for forming a superfine pattern and a method employing the same for forming a superfine pattern. The composition enables to simply produce a superfine pattern with high mass productivity. The composition comprises perhydropolysilazane (I), silicon-containing polymer (II) having a hydrocarbon group, and a solvent. The mixture of those polymers contains silicon-hydrogen bonds and silicon-hydrocarbon group bonds in such amounts that the number of the silicon-hydrocarbon group bonds is in a ratio of 1 to 44% based on the total number of the silicon-hydrogen bonds and the silicon-hydrocarbon group bonds. The composition is applied on a resist pattern to form a spacer formed of the composition on the side wall of the ridges in the pattern, and then the spacer or a resin layer disposed around the spacer is used as a mask to form a superfine pattern.
    Type: Application
    Filed: December 27, 2010
    Publication date: June 28, 2012
    Inventors: Munirathna Padmanaban, Jin Li, Toru Koike, Yusuke Takano, Kazunori Kurosawa
  • Publication number: 20120122029
    Abstract: The present invention relates to a photoimageable underlayer composition comprising a polymer, a crosslinker comprising a vinyl ether group, and a thermal acid generator comprising a salt of a mono or polycarboxylic acid and an amine, where the amine has a boiling point of at least 150° C. The invention also relates to a process for forming an image in the underlayer comprising the novel composition.
    Type: Application
    Filed: November 11, 2010
    Publication date: May 17, 2012
    Inventors: Takanori Kudo, Alberto Dioses, Edward Ng, Srinivasan Chakrapani, Munirathna Padmanaban
  • Publication number: 20120108067
    Abstract: The invention relates to an edge bead remover composition for an organic film disposed on a substrate surface, comprising an organic solvent and at least one polymer having a contact angle with water greater than 70°. The invention also relates to a process for using the composition as an edge bead remover for an organic film.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 3, 2012
    Inventors: Mark O. Neisser, Srinivasan Chakrapani, Munirathna Padmanaban, Ralph R. Dammel
  • Publication number: 20110086312
    Abstract: The present invention relates to a positive bottom photoimageable antireflective coating composition which is capable of being developed in an aqueous alkaline developer, wherein the antireflective coating composition comprises a polymer comprising at least one recurring unit with a chromophore group and one recurring unit with a hydroxyl and/or a carboxyl group, a vinyl ether terminated crosslinking agent of structure (7), and optionally, a photoacid generator and/or an acid and/or a thermal acid generator, where structure (7) is wherein W is selected from (C1-C30) linear, branched or cyclic alkyl moiety, substituted or unsubstituted (C3-C40) alicyclic hydrocarbon moiety and substituted is or unsubstituted (C3-C40) cycloalkylalkylene moiety; R is selected from C1-C10 linear or branched alkylene and n?2. The invention further relates to a process for using such a composition.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 14, 2011
    Inventors: Ralph R. Dammel, Srinivasan Chakrapani, Munirathna Padmanaban, Shinji Miyazaki, Edward W. Ng, Takanori Kudo, Alberto D. Dioses, Francis M. Houlihan
  • Publication number: 20110076626
    Abstract: The invention relates to a photoimageable antireflective coating composition capable of forming a pattern by development in an aqueous alkaline solution, comprising, (i) a polymer A soluble in a coating solvent and comprises a chromophore, a crosslinking moiety, and optionally a cleavable group which under acid or thermal conditions produces a functionality which aids in the solubility of the polymer in an aqueous alkaline solution and; (ii) at least one photoacid generator; (iii) a crosslinking agent; (iv) optionally, a thermal acid generator; (v) a polymer B which is soluble in an aqueous alkaline solution prior to development, where polymer B is non-miscible with polymer A and soluble in the coating solvent, and; (vi) a coating solvent composition, and (vii) optionally, a quencher. The invention also relates to a process for imaging the antireflective coating.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani, Francis M. Houlihan, Shinji Miyazaki, Edward Ng, Mark O. Neisser
  • Patent number: 7833693
    Abstract: The present application relates to a compound of formula A-X—B, where (i) A-X—B form an ionic compound Ai Xi Bi where Ai and Bi are each individually an organic onium cation; and Xi is anion of the formula Q-R500—SO3? or (ii) A-X—B form a non-ionic compound Ac-Xc-Bc, where Ai, Bi, Q, R500, Ac, Bc, and Xc are defined herein. The compounds are useful as photoactive materials.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: November 16, 2010
    Inventors: M. Dalil Rahman, Francis M. Houlihan, Munirathna Padmanaban, SangHo Lee, Ralph R. Dammel, David Rentkiewicz, Clement Anyadiegwu
  • Publication number: 20100136477
    Abstract: The present invention relates to a novel photosensitive composition comprising a) an organic polymer, b) a photobase generator of structure (1), and c) optionally a photoacid generator, (+A1?O2C)—B—(CO2?A2+)x??(1) where A1+ and A2+ are independently an onium cation, x is an integer greater than or equal to 1, and B is a nonfluorinated hydrocarbon moiety. The photosensitive composition may be used as a photoresist composition or be used as an alkali developable antireflective underlayer coating composition.
    Type: Application
    Filed: December 1, 2008
    Publication date: June 3, 2010
    Inventors: Edward W. Ng, Nelson M. Felix, Munirathna Padmanaban, Srinivasan Chakrapani
  • Patent number: 7678528
    Abstract: The present invention relates to novel photoacid generators.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: March 16, 2010
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: M. Dalil Rahman, Munirathna Padmanaban
  • Publication number: 20090253080
    Abstract: A process for forming a photoresist pattern on a device, comprising; a) forming a layer of first photoresist on a substrate from a first photoresist composition; b) imagewise exposing the first photoresist; c) developing the first photoresist to form a first photoresist pattern; d) treating the first photoresist pattern with a hardening compound comprising at least 2 amino (NH2) groups, thereby forming a hardened first photoresist pattern; e) forming a second photoresist layer on the region of the substrate including the hardened first photoresist pattern from a second photoresist composition; f) imagewise exposing the second photoresist; and, g) developing the imagewise exposed second photoresist to form a second photoresist pattern between the first photoresist pattern, thereby providing a double photoresist pattern.
    Type: Application
    Filed: April 2, 2008
    Publication date: October 8, 2009
    Inventors: Ralph R. Dammel, David Abdallah, Eric Alemy, Munirathna Padmanaban
  • Patent number: 7595141
    Abstract: The present invention relates to an aqueous coating composition for coating a photoresist pattern comprising a polymer containing amino group. The present invention also relates to a process for manufacturing a microelectronic device comprising providing a substrate with a photoresist pattern, coating the photoresist pattern with the novel coating material reacting a portion of the coating material in contact with the photoresist pattern, and removing a portion of the coating material which is not reacted with a removal solution.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: September 29, 2009
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Takanori Kudo, Munirathna Padmanaban, Ralph R. Dammel
  • Patent number: 7537879
    Abstract: The present invention relates to a novel chemically amplified photoresist, which is sensitive to wavelengths between 300 nm and 100 nm, and comprises a) a novel polymer comprising a sulfone group pendant from a polymer backbone that is insoluble in an aqueous alkaline solution and comprises at least one acidic moiety protected with acid labile group, and b) a compound capable of producing an acid upon irradiation. The invention also relates to a process of imaging the novel positive photoresist composition.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: May 26, 2009
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Francis M. Houlihan, Ralph R. Dammel, Andrew R. Romano, Munirathna Padmanaban, M. Dalil Rahman
  • Patent number: 7521170
    Abstract: The present application relates to a compound of formula A-X—B, where (i)A-X—B form an ionic compound Ai Xi Bi where Ai and Bi are each individually an organic onium cation; and Xi is anion of the formula Q-R500—SO3? or (ii)A-X—B form a non-ionic compound Ac-Xc-Bc, where Ai, Bi, Q, R500, Ac, Bc, and Xc are defined herein. The compounds are useful as photoactive materials.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: April 21, 2009
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: M. Dalil Rahman, Francis M. Houlihan, Munirathna Padmanaban, SangHo Lee, Ralph R. Dammel, David Rentkiewicz, Clement Anyadiegwu
  • Publication number: 20090087782
    Abstract: The present application relates to a compound of formula A-X—B, where (i) A-X—B form an ionic compound Ai Xi Bi where Ai and Bi are each individually an organic onium cation; and Xi is anion of the formula Q-R500—SO3? or (ii) A-X—B form a non-ionic compound Ac-Xc-Bc, where Ai, Bi, Q,, R500, Ac, Bc, and Xc are defined herein. The compounds are useful as photoactive materials.
    Type: Application
    Filed: December 10, 2008
    Publication date: April 2, 2009
    Inventors: M. Dalil Rahman, Francis M. Houlihan, Munirathna Padmanaban, SangHo Lee, Ralph R. Dammel, David Rentkiewicz, Clement Anyadiegwu
  • Publication number: 20090053652
    Abstract: Photoresist compositions are disclosed.
    Type: Application
    Filed: August 24, 2007
    Publication date: February 26, 2009
    Inventors: Srinivasan Chakrapani, Munirathna Padmanaban, Muthiah Thiyagarajan, Takanori Kudo, David L. Rentkiewicz
  • Patent number: 7491482
    Abstract: The present application relates to a compound of formula AiXi where Ai is an organic onium cation; and Xi is an anion of the formula X—CF2CF2OCF2CF2—SO3?. The compounds are useful as photoactive materials.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: February 17, 2009
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani, M. Dalil Rahman