Patents by Inventor Raj Sakamuri

Raj Sakamuri 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: 20190171105
    Abstract: This disclosure relates to a photosensitive composition that includes at least one fully imidized polyimide polymer having a weight average molecular weight in the range of about 20,000 Daltons to about 70,000 Daltons; at least one solubility switching compound; at least one photoinitiator; and at least one solvent. The composition is capable of forming a film or a dry film having a dissolution rate of greater than about 0.15 micron/second using cyclopentanone as a developer.
    Type: Application
    Filed: July 11, 2018
    Publication date: June 6, 2019
    Inventors: Sanjay Malik, Raj Sakamuri, Ognian N. Dimov, Binod B. De, William A. Reinerth, Ahmad A. Naiini
  • Publication number: 20190129303
    Abstract: This disclosure relates to a polyimide polymer that includes the reaction product of: (a) at least one diamine selected from the group consisting of a diamine of Structure (Ia) and a diamine of Structure (Ib), (b) at least one diamine of Structure (II), (c) at least one tetracarboxylic acid dianhydride, and optionally (d) at least one compound containing a first functional group reactive with an amine or an anhydride and at least one second functional group selected from the group consisting of a substituted or unsubstituted alkenyl group and a substituted or unsubstituted alkynyl group. Each variable in the above formulas is defined in the specification.
    Type: Application
    Filed: October 25, 2017
    Publication date: May 2, 2019
    Inventors: William A. Reinerth, Binod B. De, Sanjay Malik, Raj Sakamuri, Ognian N. Dimov, Ahmad A. Naiini
  • Publication number: 20190081001
    Abstract: This disclosure relates to dielectric film forming compositions containing a) at least one fully imidized polyimide polymer; b) at least one metal-containing (meth)acrylates; c) at least one catalyst; and d) at least one solvent, as well as related processes and related products. The compositions can form a dielectric film that generates substantially no debris when the dielectric film is patterned by laser ablation process.
    Type: Application
    Filed: February 28, 2018
    Publication date: March 14, 2019
    Inventors: Sanjay Malik, William A. Reinerth, Ognian Dimov, Raj Sakamuri
  • Publication number: 20190016999
    Abstract: This disclosure relates to a composition (e.g., a cleaning and/or stripping composition) containing (a) 0.5-25 percent by weight an alkaline compound; (b) 1-25 percent by weight an alcohol amine compound; (c) 0.1-20 percent by weight a hydroxylammonium compound; (d) 5-95 percent by weight an organic solvent; (e) 0.1-5 percent by weight a corrosion inhibitor compound; and (f) 2-25 percent by weight water.
    Type: Application
    Filed: July 28, 2016
    Publication date: January 17, 2019
    Inventors: Raj Sakamuri, Ognian N. Dimov, Ahmad A. Naiini, Sanjay Malik, Binod B. De, William A. Reinerth
  • Publication number: 20190018321
    Abstract: This disclosure relates to a photosensitive stacked structure that includes first and second layers, in which the first layer is a photosensitive, dielectric layer and the second layer is a photosensitive layer. The dissolution rate of the first layer in a developer is less than the dissolution rate of the second layer in the developer.
    Type: Application
    Filed: December 20, 2016
    Publication date: January 17, 2019
    Inventors: Sanjay Malik, Raj Sakamuri, Ognian N. Dimov, Binod B. De, William A. Reinerth, Ahmad A. Naiini
  • Patent number: 10036952
    Abstract: This disclosure relates to a photosensitive composition that includes at least one fully imidized polyimide polymer having a weight average molecular weight in the range of about 20,000 Daltons to about 70,000 Daltons; at least one solubility switching compound; at least one photoinitiator; and at least one solvent. The composition is capable of forming a film or a dry film having a dissolution rate of greater than about 0.15 micron/second using cyclopentanone as a developer.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: July 31, 2018
    Assignee: Fujifilm Electronic Materials U.S.A., Inc.
    Inventors: Sanjay Malik, Raj Sakamuri, Ognian N. Dimov, Binod B. De, William A. Reinerth, Ahmad A. Naiini
  • Publication number: 20180136563
    Abstract: This disclosure relates to a process for stripping an organic film on a patterned semiconductor substrate. The process includes treating the organic film with an aqueous stripper composition to remove the organic film in one step. The organic film includes at least a first layer and a second layer, the first layer has a dissolution rate of at most about 0.01 ?/min in a developer at 25° C., and the second layer has a dissolution rate of greater than about 0.01 ?/min in the developer at 25° C.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 17, 2018
    Inventors: Raj Sakamuri, Sanjay Malik, Ognian Dimov
  • Publication number: 20160313641
    Abstract: This disclosure relates to a dry film structure that includes a carrier substrate, and a polymeric layer supported by the carrier substrate. The polymeric layer includes at least one fully imidized polyimide polymer.
    Type: Application
    Filed: April 19, 2016
    Publication date: October 27, 2016
    Inventors: Binod B. De, Sanjay Malik, Raj Sakamuri, William A. Reinerth, Ognian N. Dimov, Ahmad A. Naiini
  • Publication number: 20160313642
    Abstract: This disclosure relates to a photosensitive composition that includes at least one fully imidized polyimide polymer having a weight average molecular weight in the range of about 20,000 Daltons to about 70,000 Daltons; at least one solubility switching compound; at least one photoinitiator; and at least one solvent. The composition is capable of forming a film or a dry film having a dissolution rate of greater than about 0.15 micron/second using cyclopentanone as a developer.
    Type: Application
    Filed: April 19, 2016
    Publication date: October 27, 2016
    Inventors: Sanjay Malik, Raj Sakamuri, Ognian N. Dimov, Binod B. De, William A. Reinerth, Ahmad A. Naiini
  • Patent number: 7727705
    Abstract: An etch resistant thermally curable Underlayer for use in a multiplayer liyhographic process to produce a photolithographic bilayer coated substrate, the composition having: (a) at least one cycloolefin polymer comprising at least one repeating unit of Structure (I), and at least one repeating unit of Structure (II), and optionally at least one repeating unit of Structure (III) with the proviso that neither Structure (I) nor Structure (II) nor Structure (III) contains acid sensitive groups. b) at least one cross-linking agent selected from the group consisting of an amino or phenolic cross-linking agent; c) a least one thermal acid generator (TAG); d) at lest one solvent; and e) optionally, at least one surfactant.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: June 1, 2010
    Assignee: Fujifilm Electronic Materials, U.S.A., Inc.
    Inventors: Binod B. De, Sanjay Malik, Raj Sakamuri, Chisun Hong
  • Patent number: 7473512
    Abstract: The present invention relates to a process for imaging deep ultraviolet (uv) photoresists with a topcoat using deep uv immersion lithography. The invention further relates to a topcoat composition comprising a polymer with at least one ionizable group having a pKa ranging from about ?9 to about 11. The invention also relates to a process for imaging a photoresist with a top barrier coat to prevent contamination of the photoresist from environmental contaminants.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: January 6, 2009
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Francis M. Houlihan, Ralph R. Dammel, Andrew R. Romano, Raj Sakamuri
  • Publication number: 20080206667
    Abstract: An etch resistant thermally curable Underlayer for use in a multiplayer liyhographic process to produce a photolithographic bilayer coated substrate, the composition having: (a) at least one cycloolefin polymer comprising at least one repeating unit of Structure (I), and at least one repeating unit of Structure (II), and optionally at least one repeating unit of Structure (III) with the proviso that neither Structure (I) nor Structure (II) nor Structure (III) contains acid sensitive groups. b) at least one cross-linking agent selected from the group consisting of an amino or phenolic cross-linking agent; c) a least one thermal acid generator (TAG); d) at lest one solvent; and e) optionally, at least one surfactant.
    Type: Application
    Filed: February 20, 2008
    Publication date: August 28, 2008
    Inventors: Binod B. De, Sanjay Malik, Raj Sakamuri, Chisun Hong
  • Patent number: 7351521
    Abstract: The present invention relates to a photoresist composition comprising a photoacid generator and at least one polymer comprising at least one unit as described by structure 1, The invention also relates to a process for imaging the photoresist composition of the present invention, and to a process of making the polymer in the presence of an organic base.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: April 1, 2008
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Ralph R. Dammel, Raj Sakamuri, Francis M. Houlihan
  • Publication number: 20070172762
    Abstract: The present invention relates to a photoresist composition comprising a photoacid generator and at least one polymer comprising at least one unit as described by structure 1, The invention also relates to a process for imaging the photoresist composition of the present invention, and to a process of making the polymer in the presence of an organic base.
    Type: Application
    Filed: March 9, 2007
    Publication date: July 26, 2007
    Inventors: Ralph Dammel, Raj Sakamuri, Francis Houlihan
  • Publication number: 20070154841
    Abstract: The present invention relates to a photoresist composition comprising a photoacid generator and at least one polymer comprising at least one unit as described by structure 1, The invention also relates to a process for imaging the photoresist composition of the present invention, and to a process of making the polymer in the presence of an organic base.
    Type: Application
    Filed: March 9, 2007
    Publication date: July 5, 2007
    Inventors: Ralph Dammel, Raj Sakamuri, Francis Houlihan
  • Patent number: 7211366
    Abstract: The present invention relates to a photoresist composition comprising a photoacid generator and at least one polymer comprising at least one unit as described by structure 1, The invention also relates to a process for imaging the photoresist composition of the present invention, and to a process of making the polymer in the presence of an organic base.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: May 1, 2007
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Ralph R. Dammel, Raj Sakamuri, Francis M. Houlihan
  • Publication number: 20060199103
    Abstract: Disclosed is a process for forming an image on a substrate, comprising the steps of: (a) coating on the substrate a first layer of a radiation sensitive, antireflective composition; (b) coating a second layer of a photoresist composition onto the first layer of the antireflective composition; (c) selectively exposing the coated substrate from step (b) to actinic radiation; and (d) developing the exposed coated substrate from step (c) to form an image; wherein both the photoresist composition and the antireflective composition are exposed in step (c); both are developed in step (d) using a single developer; wherein the antireflective composition of step (a) is a first minimum bottom antireflective coating (B.A.R.C.) composition, having a solids content of up to about 8% solids, and a maximum coating thickness of the coated substrate of ?/2n wherein ? is the wavelength of the actinic radiation of step (c) and n is the refractive index of the B.A.R.C. composition.
    Type: Application
    Filed: May 2, 2006
    Publication date: September 7, 2006
    Inventors: Mark Neisser, Joseph Oberlander, Medhat Toukhy, Raj Sakamuri, Shuji Ding-Lee
  • Patent number: 7070914
    Abstract: Disclosed is a process for forming an image on a substrate, comprising the steps of: (a) coating on the substrate a first layer of a radiation sensitive, antireflective composition; (b) coating a second layer of a photoresist composition onto the first layer of the antireflective composition; (c) selectively exposing the coated substrate from step (b) to actinic radiation; and (d) developing the exposed coated substrate from step (c) to form an image; wherein both the photoresist composition and the antireflective composition are exposed in step (c); both are developed in step (d) using a single developer; wherein the antireflective composition of step (a) is a first minimum bottom antireflective coating (B.A.R.C.) composition, having a solids content of up to about 8% solids, and a maximum coating thickness of the coated substrate of ? 2 ? n wherein ? is the wavelength of the actinic radiation of step (c) and n is the refractive index of the B.A.R.C. composition.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: July 4, 2006
    Assignee: AZ Electronic Materials USA Corp.
    Inventors: Mark O. Neisser, Joseph E. Oberlander, Medhat A. Toukhy, Raj Sakamuri, Shuji Ding-Lee
  • Publication number: 20050202340
    Abstract: The present invention relates to a process for imaging deep ultraviolet (uv) photoresists with a topcoat using deep uv immersion lithography. The invention further relates to a topcoat composition comprising a polymer with at least one ionizable group having a pKa ranging from about ?9 to about 11. The invention also relates to a process for imaging a photoresist with a top barrier coat to prevent contamination of the photoresist from environmental contaminants.
    Type: Application
    Filed: January 27, 2005
    Publication date: September 15, 2005
    Inventors: Francis Houlihan, Ralph Dammel, Andrew Romano, Raj Sakamuri
  • Publication number: 20050202347
    Abstract: The present invention relates to a process for imaging deep ultraviolet (uv) photoresists with a topcoat using deep uv immersion lithography. The invention further relates to a topcoat composition comprising a polymer with at least one ionizable group having a pKa ranging from about ?9 to about 11. The invention also relates to a process for imaging a photoresist with a top barrier coat to prevent contamination of the photoresist from environmental contaminants.
    Type: Application
    Filed: June 24, 2004
    Publication date: September 15, 2005
    Inventors: Francis Houlihan, Ralph Dammel, Andrew Romano, Raj Sakamuri