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).

  • Publication number: 20090042148
    Abstract: The present invention refers to a photoresist composition comprising (i) a polymer A comprising at least one acid labile group; (ii) at least one photoacid generator; (iii) at least one base; (iv) a polymer B, where polymer B is non-miscible with polymer A and soluble in the coating solvent, and; (v) a coating solvent composition. The present invention also relates to the process of imaging the photoresist.
    Type: Application
    Filed: August 6, 2007
    Publication date: February 12, 2009
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani, Guanyang Lin
  • Publication number: 20080187868
    Abstract: The present application relates to a composition comprising a) a polymer containing an acid labile group; b) a compound selected from (i), (ii) and mixtures thereof, where (i) is Ai Xi Bi and (ii) is Ai Xi1; and c) a compound of formula Ai Xi2 where Ai, Bi, Xi, Xi1, and Xi2 are defined herein. The compositions are useful in the semiconductor industry.
    Type: Application
    Filed: February 7, 2007
    Publication date: August 7, 2008
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani
  • Publication number: 20080171270
    Abstract: The present application relates to a polymer having the formula where R30, R31, R32, R33, R40, R41, R42, jj, kk, mm, and nn are described herein. The compounds are useful in forming photoresist compositions.
    Type: Application
    Filed: January 16, 2007
    Publication date: July 17, 2008
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani, Ralph R. Dammel
  • Publication number: 20080131811
    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: Application
    Filed: December 4, 2006
    Publication date: June 5, 2008
    Inventors: Munirathna Padmanaban, Srinivasan Chakrapani, M. Dalil Rahman
  • Publication number: 20080035556
    Abstract: The present invention provides a method of reducing metals in solutions of film forming resins and a related filter sheet.
    Type: Application
    Filed: October 17, 2007
    Publication date: February 14, 2008
    Inventors: Munirathna Padmanaban, M. Rahman
  • Publication number: 20070111138
    Abstract: The present invention relates to novel photoacid generators.
    Type: Application
    Filed: February 16, 2006
    Publication date: May 17, 2007
    Inventors: M. Rahman, Munirathna Padmanaban
  • Publication number: 20070015084
    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: February 16, 2006
    Publication date: January 18, 2007
    Inventors: M. Rahman, Francis Houlihan, Munirathna Padmanaban, SangHo Lee, Ralph Dammel, David Rentkiewicz, Clement Anyadiegwu
  • Patent number: 7122291
    Abstract: The present invention provides for a photoresist composition comprising a mixture of two different copolymers.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: October 17, 2006
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Munirathna Padmanaban, Guanyang Lin, Takanori Kudo, Chi-Sun Hong, M. Dalil Rahman
  • Publication number: 20060110677
    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: Application
    Filed: November 22, 2004
    Publication date: May 25, 2006
    Inventors: Francis Houlihan, Ralph Dammel, Andrew Romano, Munirathna Padmanaban, M. Rahman
  • Publication number: 20060102554
    Abstract: The present invention provides a method of reducing metals in solutions of film forming resins and a related filter sheet.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Munirathna Padmanaban, M. Rahman
  • Publication number: 20060088788
    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: Application
    Filed: October 26, 2004
    Publication date: April 27, 2006
    Inventors: Takanori Kudo, Munirathna Padmanaban, Ralph Dammel
  • Publication number: 20060024610
    Abstract: The present invention provides for a photoresist composition comprising a mixture of two different copolymers.
    Type: Application
    Filed: August 2, 2004
    Publication date: February 2, 2006
    Inventors: Munirathna Padmanaban, Guanyang Lin, Takanori Kudo, Chi-Sun Hong, M. Dalil Rahman
  • Patent number: 6991888
    Abstract: The present invention relates to a novel photoresist composition that can be developed with an aqueous alkaline solution, and is capable of being imaged at exposure wavelengths in the deep ultraviolet. The invention also relates to a process for imaging the novel photoresist as well as novel photoacid generators. The novel photoresist comprises a) a polymer containing an acid labile group, and b) a novel mixture of photoactive compounds, where the mixture comprises a lower absorbing compound selected from structure 1 and 2, and a higher absorbing compound selected from structure 4 and 5, where, R1 and R2 R5, R6, R7, R8, and R9 are defined herein; m=1–5; X? is an anion, and Ar is selected from naphthyl, anthracyl, and structure 3, where R30, R31, R32, R33, and R34 are defined herein.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: January 31, 2006
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Munirathna Padmanaban, Takanori Kudo, Sangho Lee, Ralph R. Dammel, M. Dalil Rahman
  • Publication number: 20050271974
    Abstract: The present invention relates to novel photoacid generators.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 8, 2005
    Inventors: M. Rahman, Woo-Kyu Kim, Munirathna Padmanaban, Sangho Lee
  • Patent number: 6803168
    Abstract: A composition for an anti-reflective coating or a radiation absorbing coating which can form an anti-reflective coating or a radiation absorbing coating having high absorption to exposed radiation in the range of 100 to 450 nm, no diffusion of photo-generated acid to anti-reflective coating and so on, no intermixing of resist and anti-reflective coating layer, good shelf-life stability, and good step coverage and novel compounds and polymers being preferably used in the composition are disclosed. The composition contains an acrylic or methacrylic compound or polymer with an isocyanate or thioisocyanate group bonded through an alkylene group to a side chain thereof or with an amino or hydroxyl group-containing organic chromophore which absorbs radiation in the range of 100 to 450 nm wavelength and is bonded, for example, through an alkylene group to the isocyanate or thioisocyanate group. Resist patters with high resolution are formed on a substrate.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: October 12, 2004
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Munirathna Padmanaban, Wen-Bing Kang, Hatsuyuki Tanaka, Ken Kimura, Georg Pawlowski
  • Patent number: 6800416
    Abstract: The present invention relates to a novel negative working deep uv photoresist that is developable in an aqueous alkaline solution, and comprises a fluorinated polymer, photoactive compound and a crosslinking agent. The photoresist composition is particularly useful for patterning with exposure wavelengths of 193 nm and 157 nm.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: October 5, 2004
    Assignee: Clariant Finance (BVI) Ltd.
    Inventors: Takanori Kudo, Munirathna Padmanaban, Ralph R. Dammel, Medhat A. Touky
  • Patent number: 6737492
    Abstract: A radiation absorbing polymer having chemically bonded thereto a radiation absorbing dye, which has high absorption at a predetermined wavelength radiation, which shows good adhesion to a substrate and good thin film-forming, which has no dependence upon resists, which is soluble in a solvent for photoresists but becomes insoluble after being baked; a composition for radiation absorbing coating containing this polymer, and a radiation absorbing coating such as an anti-reflective coating formed from this composition are disclosed. The radiation absorbing polymer comprises a copolymer containing at least both a recurring unit composed of a monomer containing a keto group and a divalent group (preferably a methylene group) in its side chain and a recurring unit composed of a monomer containing an organic chromophore bonded directly or through a linkage group to the main chain. This radiation absorbing polymer is dissolved in a solvent such as alcohol, aromatic hydrocarbon, ketone, ester, etc.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: May 18, 2004
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Wen-Bing Kang, Munirathna Padmanaban, Hatsuyuki Tanaka, Ken Kimura, Takanori Kudo, Georg Pawlowski
  • Patent number: 6723488
    Abstract: The present invention relates to a photoresist composition sensitive to radiation in the deep ultraviolet, particularly a positive working photoresist sensitive in the range of 100-200 nanometers(nm). The photoresist composition comprises a) a polymer that is insoluble in an aqueous alkaline solution and comprises at least one acid labile group, and furthermore where the polymer is essentially non-phenolic, b) a compound capable of producing an acid upon radiation, and c) an additive that reduces the effect of electrons and ions on the photoresist image.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: April 20, 2004
    Assignee: Clariant Finance (BVI) Ltd
    Inventors: Takanori Kudo, Ralph R. Dammel, Munirathna Padmanaban
  • Publication number: 20030235775
    Abstract: The present invention relates to a novel photoresist that can be developed with an aqueous alkaline solution, and is capable of being imaged at exposure wavelengths in the deep ultraviolet. The invention also relates to a process for imaging the novel photoresist.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 25, 2003
    Inventors: Munirathna Padmanaban, Takanori Kudo, Sangho Lee, Ralph R. Dammel, M. Dalil Rahman
  • Publication number: 20030235782
    Abstract: The present invention relates to a novel photoresist composition that can be developed with an aqueous alkaline solution, and is capable of being imaged at exposure wavelengths in the deep ultraviolet. The invention also relates to a process for imaging the novel photoresist as well as novel photoacid generators.
    Type: Application
    Filed: May 16, 2003
    Publication date: December 25, 2003
    Inventors: Munirathna Padmanaban, Takanori Kudo, Sangho Lee, Ralph R. Dammel, M. Dalil Rahman