Patents by Inventor Durairaj Baskaran
Durairaj Baskaran 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: 20250034306Abstract: The invention relates to a random copolymer of structure (A) comprising, a carboxylic acid bearing repeat of structure (I), a 4-vinylbenzocyclobutene derived repeat unit of structure of structure (II), a styrenic repeat unit of structure (III), an alkyl acrylate or alkyl 2-methylenealkanoate derived repeat unit of structure (IV), a hydroxy functionalized alkyl acrylate or alkyl 2-methylenealkanoate derived repeat unit of structure (V), and two end groups as shown in structure (A) one of which is H and the other is a methyl moiety substituted with Rr, Rr1 and Rr2, wherein Rr1, is a C-1 to C-8 alkyl, Rr2 is selected from a C-1 to C-8 alkyl, a C-1 to C-8 alkylene hydroxy moiety (-alkylene-OH), a C-1-C-8 alkylenecarboxylic acid moiety (-alkylenne-CO2H), or a benzylic alcohol comprising moiety of structure (B), Rr is a cyano moiety (—CN) or a carbonylalkyl moiety (—C(?O)—Ri), wherein Ri is a C-1 to C-8 alkyl or an aryl moiety.Type: ApplicationFiled: November 30, 2022Publication date: January 30, 2025Inventors: Edward W. NG, Durairaj BASKARAN
-
Publication number: 20240368410Abstract: The present invention relates to a compound of structure (I), wherein A is a core moiety which is selected from structure (Ia), (Ib), (Ic) and (Id), to which is attached through X, a direct valence bond or a divalent linking group, m number of linear alkylene moieties of chain length n where each said linear alkylene moiety has a terminal B reactive moiety, and further wherein * designates possible attachment point of said linear alkylene moieties in each structure, B is selected from —OH, —CH?CH2, —O—(P?O)(OR)2, —O—(P?O)(OR)Rs, —N3 and —SH, where n ranges from 8 to 12. The invention also pertains to composition comprising these compounds and the use these compositions to form self-assembled monolayers (SAM) the use of these in DSA processing as neutral or directing layers which can be removed selectively from metal substrates.and the remover solution to accomplish this selective removal.Type: ApplicationFiled: September 5, 2022Publication date: November 7, 2024Inventors: Sachin BOBADE, Durairaj BASKARAN
-
Publication number: 20240247093Abstract: The present invention relates to two different block copolymer families having structures (1) or (6) which both have a polydispersity ranging from 1 to about 1.09. In structure (1), A is a polar block copolymer segment comprised of either alkyl 2-methylenealkanoate derived repeating units, lactone derived repeat units, oxirane derived repeat units, oxetane or cyclic carbonate derived repeat units; L is either a direct valence bond or a linking moiety derived from a 1, 1-diarylethene; B segment is a non-polarblock copolymer segment comprised of styrenic repeat unit, E are end groups selected; and wherein said block copolymer is multi-tethered with oligo flexible tethered groups at various positions as outlined. In structure (6), Ai is a polar block copolymer segment which has Tg of about 50° C. and to about 100° C.Type: ApplicationFiled: April 21, 2022Publication date: July 25, 2024Inventors: Md S. RAHMAN, Durairaj BASKARAN, Jin LI, Sachin BOBADE, EunJeong JEONG, Zhong LI
-
Publication number: 20240219829Abstract: The present invention relates to a novel random copolymer whose repeat units comprise repeat units of structure (I), (II) and (III), wherein R1 and R2 are independently a C-1 to C-4 alkyl, x and y are independently the number of R1 and R2 which independently range from an integer from 0 to 3, R3 is a C-1 to C-4 alkyl, and R4 is selected from a C-2 to C-10 primary alkyl, or a moiety comprising an arene selected from the group consisting of a substituted or unsubstituted biphenyl moiety, a substituted or unsubstituted phenyl moiety, and a substituted or unsubstituted benzylic moiety. Another aspect of this invention is a composition comprising this random copolymer, and an organic spin casting solvent. A further aspect of this invention is using a coating of this composition to form a patterned pinning MAT for use directed self-assembly.Type: ApplicationFiled: May 16, 2022Publication date: July 4, 2024Inventors: Durairaj BASKARAN, Ashley MOORE, Victor MONREAL, Zhong LI
-
Publication number: 20240010865Abstract: The disclosed subject matter relates compounds of structure (I), and polymers of structure (II) having a polydispersity ranging from 1 to about 1.1, compositions comprising said polymers and a spin casting solvent, the process of forming a pinning layer el selectively on metal with said composition and the process of using said pinning layers to affect chemoepitaxy directed self-assembly of an overlying block copolymer, and the subsequent process of pattern transfer of this self-assembled layer into a substrate by etching.Type: ApplicationFiled: October 18, 2021Publication date: January 11, 2024Inventors: EunJeong JEONG, Durairaj BASKARAN, Jihoon KIM
-
Publication number: 20240002571Abstract: The disclosed subject matter relates to a block polymer comprising structure (1): (A)-(C)-(B), wherein (A) is a first polymer block segment comprising a block segment selected from structure (1a), structure (1b), and a mixture of structures (1a) an (1b), (C) is a spacer moiety comprising structure (1c); and wherein B) is a second polymer block segment comprising repeat units derived from either an alkyl 2-methylenealkanoate, a lactone; a cyclic carbonate, an oxirane, or an oxetane. The disclose matter also pertains to a composition of said block polymer in a spin casting solvent and using this solution in a process of directed self-assembly.Type: ApplicationFiled: December 15, 2021Publication date: January 4, 2024Inventors: Durairaj BASKARAN, Md S. RAHMAN, Sachin BOBADE, Edward W. NG, Victor MONREAL, EunJeong JEONG
-
Publication number: 20220389135Abstract: One aspect of this invention is a novel functional polymer having a polydispersity from 1 to about 1.12 comprising at least one reactive moiety, selected from a moiety comprising at least one N-coordinative functional group having at least one lone pair of electrons, a moiety comprising a dialkylsilyl group, or a mixture of both groups, wherein said reactive moiety is present in said functional styrenic polymer either on a repeat unit, on an end group or on both, and said N-coordinative functional group is either a monodentate N-coordinative functional group, a polydendate N-coordinative group or a mixture of thereof, and said monodentate coordinative functional group is an azide moiety (—N3) or a cyano moiety (—CN). Another aspect of this invention is the use of these novel polymer to selectively deposit a DSA directing layer on a metallic substrate.Type: ApplicationFiled: November 24, 2020Publication date: December 8, 2022Inventors: Durairaj BASKARAN, MD S. RAHMAN, Sachin BOBADE
-
Publication number: 20220010125Abstract: The present invention relates to a composition comprising components a), b) and c). The component a) is a block copolymer or a blend of block copolymers. The component b) is a low Tg additive selected from the group consisting of an oligo random oligo random copolymer b-1), an oligo diblock copolymer b-2), an oligo diblock copolymer b-3) and a mixture of at least two of these. The component c) is a is a spin casting organic solvent. The invention also pertains to the use of said compositions in directed self-assembly. The invention further pertains to the novel oligo diblock copolymer b-2) which is an oligo diblock copolymer of block A-b) and block B-b), wherein block A-b) is a random copolymer of repeat units having structures (III), and (IV and block B-b) is a random copolymer of repeat units having structures (V), and (VI). Formulas (III), (IV), (V), (VI).Type: ApplicationFiled: January 15, 2020Publication date: January 13, 2022Inventors: Durairaj BASKARAN, Victor MONREAL
-
Publication number: 20220002575Abstract: The present invention relates to a random copolymer comprising repeat units of structure (I), (II), (III), and (IV). The invention also pertains to a neutral layer composition comprised of said random copolymer and also pertains to the use of said neutral layer composition to make a crosslinked neutral layer film on a substrate, which can enable self-assembly of a film of a block copolymer overlying said crosslinked neutral layer, wherein said block copolymer contains etch resistant and etchable block, and whose self-assembled pattern is used, through etching, to create either an array of contact holes or posts in said substrate.Type: ApplicationFiled: December 4, 2019Publication date: January 6, 2022Inventors: Durairaj BASKARAN, MD S. RAHMAN, Victor MONREAL
-
Patent number: 11067893Abstract: The present invention relates to a novel styrenic polymer and to the novel composition comprised of this polymer and a solvent; wherein the styrenic polymer has a polydispersity from 1 to 1.3 and further wherein each polymer chain of the styrenic polymer is capped with one end group of structure 1), wherein, and L is a linking group selected from the group consisting of a direct valence bond, oxy (—O—), carbonyloxy, (—(C?O)—O—), carbonate (—O—(C?O)—O—); L2 is a C-1 to C-20 substituted or unsubstituted alkylene spacer, an arylene spacer or a direct valence bond, R, is hydrogen, a halide, a C-1 to C-20 alkyl moiety, or a C-1 to C-20 alkyloxy moiety, m is an integer from 1 to 3; and (I) represent the direct valence bond attaching the end group 1) to the end of the polymer chain of the styrenic polymer. In another aspect of this invention it pertains to the use of this composition to create self-assembly process.Type: GrantFiled: December 19, 2017Date of Patent: July 20, 2021Assignee: Merck Patent GMbHInventors: Hengpeng Wu, JiHoon Kim, Jianhui Shan, Durairaj Baskaran, Md S. Rahman
-
Patent number: 11031237Abstract: The present invention relates to new aromatic-amino functional siloxanes, which are compounds comprising one or two tail groups X2, and a linking group L of structure (2) linking each said tail group to said head group, wherein the head group X has structure (1), containing an optional organic moiety Y, wherein the attachment point of said tail group X2 through said linking group L to the head group X1, may be, at positions a, b, c, d, or e. Another aspect of this invention are compositions containing these novel aromatic amino functional siloxane. A further aspect of this invention are compositions comprised of the above novel aromatic-amino functional siloxanes, and also the composition resulting from the aging of these compositions at room temperature for about 1 day to about 4 weeks.Type: GrantFiled: October 23, 2018Date of Patent: June 8, 2021Assignee: Merck Patent GMbHInventors: Sachin Bobade, Orest Polishchuk, Munirathna Padmanaban, Durairaj Baskaran
-
Publication number: 20200273701Abstract: The present invention relates to new aromatic-amino functional siloxanes, which are compounds comprising one or two tail groups X2, and a linking group L of structure (2) linking each said tail group to said head group, wherein the head group X has structure (1), containing an optional organic moiety Y, wherein the attachment point of said tail group X2 through said linking group L to the head group X1, may be, at positions a, b, c, d, or e. Another aspect of this invention are compositions containing these novel aromatic amino functional siloxane. A further aspect of this invention are compositions comprised of the above novel aromatic-amino functional siloxanes, and also the composition resulting from the aging of these compositions at room temperature for about 1 day to about 4 weeks.Type: ApplicationFiled: October 23, 2018Publication date: August 27, 2020Inventors: Sachin BOBADE, Orest POLISHCHUK, Munirathna PADMANABAN, Durairaj BASKARAN
-
Publication number: 20200019062Abstract: The present invention relates to a novel styrenic polymer and to the novel composition comprised of this polymer and a solvent; wherein the styrenic polymer has a polydispersity from 1 to 1.3 and further wherein each polymer chain of the styrenic polymer is capped with one end group of structure 1), wherein, and L is a linking group selected from the group consisting of a direct valence bond, oxy (—O—), carbonyloxy, (—(C?O)—O—), carbonate (—O—(C?O)—O—); L2 is a C-1 to C-20 substituted or unsubstituted alkylene spacer, an arylene spacer or a direct valence bond, R, is hydrogen, a halide, a C-1 to C-20 alkyl moiety, or a C-1 to C-20 alkyloxy moiety, m is an integer from 1 to 3; and (I) represent the direct valence bond attaching the end group 1) to the end of the polymer chain of the styrenic polymer. In another aspect of this invention it pertains to the use of this composition to create self-assembly process.Type: ApplicationFiled: December 19, 2017Publication date: January 16, 2020Inventors: Hengpeng Wu, JiHoon Kim, Jianhui Shan, Durairaj Baskaran, Md S. Rahman
-
Patent number: 10259907Abstract: The present invention relates to a novel block copolymer of structure 1, wherein, A- is a block polymer chain, B is a block polymer chain, wherein, A- and B- are chemically different, covalently connected polymer chains, which are phase separable and the moiety X(Y(Z)b)a is a junction group, which comprises a surface active pendant moiety Y(Z)b wherein: a is an integer from 1 to 4 denoting the number of surface active pendant moieties Y(Z)b on X, b is an integer from 1 to 5 denoting the number of Z moieties on the linking moiety Y, X is a linking group between the A polymer block, the B polymer block and the moiety Y, Y is a linking group or a direct valence bond between X and Z; and Z is a moiety independently selected from, a fluorine containing moiety, a Si1-Si8 siloxane containing moiety or a hydrocarbon moiety with at least 18 carbons, and further wherein the junction group X(Y(Z)b)a has a surface energy less than that that of the block A and less than that of the block B.Type: GrantFiled: February 20, 2015Date of Patent: April 16, 2019Assignees: AZ Electronic Materials (Luxembourg) S.à r.l., IBM CorporationInventors: Ankit Vora, Eri Hirahara, Joy Cheng, Durairaj Baskaran, Orest Polishchuk, Melia Tjio, Margareta Paunescu, Daniel Sanders, Guanyang Lin
-
Patent number: 10155879Abstract: The present invention relates to non aqueous, graftable coating composition comprised of a homogenous solution of a polymer and a spin casting organic solvent, where the composition does not contain acidic compounds, coloring particles, pigments or dyes, and the polymer has a linear polymer chain structure which is comprised of repeat units derived from monomers containing a single polymerizable olefinic carbon double bond, and the polymer contains at least one triarylmethyl chalcogenide containing moiety which is selected from the group consisting of repeat units having structure (I) an end chain group unit of structure (II) and mixtures thereof, and the polymer does not contain any repeat units or end groups containing water ionizable groups, ionic groups, free thiol groups, or free hydroxy groups, and where A1, A2, and A3 are independently an Aryl or a substituted Aryl; Y is a chalcogen selected from O, S, Se or Te; X1 and X2 are individually selected organic spacers; P1 is an organic polymer repeat unit mType: GrantFiled: December 21, 2015Date of Patent: December 18, 2018Assignee: AZ Electronic Materials (Luxembourg) S.à.r.l.Inventors: Guanyang Lin, Hengpeng Wu, JiHoon Kim, Jian Yin, Durairaj Baskaran, Jianhui Shan
-
Publication number: 20170174931Abstract: The present invention relates to non aqueous, graftable coating composition comprised of a homogenous solution of a polymer and a spin casting organic solvent, where the composition does not contain acidic compounds, coloring particles, pigments or dyes, and the polymer has a linear polymer chain structure which is comprised of repeat units derived from monomers containing a single polymerizable olefinic carbon double bond, and the polymer contains at least one triarylmethyl chalcogenide containing moiety which is selected from the group consisting of repeat units having structure (I) an end chain group unit of structure (II) and mixtures thereof, and the polymer does not contain any repeat units or end groups containing water ionizable groups, ionic groups, free thiol groups, or free hydroxy groups, and where A1, A2, and A3 are independently an Aryl or a substituted Aryl; Y is a chalcogen selected from O, S, Se or Te; X1 and X2 are individually selected organic spacers; P1 is an organic polymer repeat unit mType: ApplicationFiled: December 21, 2015Publication date: June 22, 2017Applicant: AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.Inventors: Guanyang Lin, Hengpeng Wu, JiHoon Kim, Jian Yin, Durairaj Baskaran, Jianhui Shan
-
Publication number: 20160244557Abstract: The present invention relates to a novel block copolymer of structure 1, wherein, A- is a block polymer chain, B is a block polymer chain, wherein, A- and B- are chemically different, covalently connected polymer chains, which are phase separable and the moiety X(Y(Z)b)a is a junction group, which comprises a surface active pendant moiety Y(Z)b wherein: a is an integer from 1 to 4 denoting the number of surface active pendant moieties Y(Z)b on X, b is an integer from 1 to 5 denoting the number of Z moieties on the linking moiety Y, X is a linking group between the A polymer block, the B polymer block and the moiety Y, Y is a linking group or a direct valence bond between X and Z; and Z is a moiety independently selected from, a fluorine containing moiety, a Si1-Si8 siloxane containing moiety or a hydrocarbon moiety with at least 18 carbons, and further wherein the junction group X(Y(Z)b)a has a surface energy less than that that of the block A and less than that of the block B.Type: ApplicationFiled: February 20, 2015Publication date: August 25, 2016Applicants: International Business Machines CorporationInventors: Ankit VORA, Eri HIRAHARA, Joy CHENG, Durairaj BASKARAN, Orest POLISHCHUK, Melia TJIO, Margareta PAUNESCU, Daniel SANDERS, Guanyang LIN
-
Publication number: 20150011446Abstract: The present invention relates (per)fluoropolyether compounds comprising a (per)fluoropolyether chain (Rf) having at least two chain ends, wherein at least one of said chain ends have a bi- or ter-phenyl group bearing at least one nitro group and, optionally one or more further substituents. The invention also relates to processes for the preparation of such compounds and to their use for the preparation of lubricant compositions in the form of oils or greases.Type: ApplicationFiled: February 12, 2013Publication date: January 8, 2015Inventors: Durairaj Baskaran, Prakash Wadgaonkar, Shamal Menon, Claudio Adolfo Pietro Tonelli
-
Patent number: 5973086Abstract: A process for the living anionic polymerization of alkyl(meth)acrylic monomers, involving polymerizing the monomers in the presence of an initiator comprising a carbanion and a metal or nonmetal salt of perchloric acid. The initiator has the formula (I): ##STR1## wherein R.sub.1 =a linear or branched alkyl group having one to six carbon atoms, R.sub.2 =a phenyl or alkyl group having one to six carbon atoms, R.sub.3 =a phenyl or an ester group and M.sup.+ is an alkali, alkaline earth metal or quarternary ammonium cation containing 1-8 carbon atoms in an alkyl group thereof.Type: GrantFiled: December 27, 1996Date of Patent: October 26, 1999Assignee: Council of Scientific & Industrial ResearchInventors: Durairaj Baskaran, Swaminathan Sivaram