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334 results about "Single bond" patented technology

In chemistry, a single bond is a chemical bond between two atoms involving two valence electrons. That is, the atoms share one pair of electrons where the bond forms. Therefore, a single bond is a type of covalent bond. When shared, each of the two electrons involved is no longer in the sole possession of the orbital in which it originated. Rather, both of the two electrons spend time in either of the orbitals which overlap in the bonding process. As a Lewis structure, a single bond is denoted as AːA or A-A, for which A represents an element (Moore, Stanitski, and Jurs 329). In the first rendition, each dot represents a shared electron, and in the second rendition, the bar represents both of the electrons shared in the single bond.

Compound, organic electroluminescent device, and electronic apparatus

To provide a compound capable of improving the emission efficiency of an organic electroluminescent device.SOLUTION: The invention provides a compound represented by the formula (2), where: Ar2 is a substituted or unsubstituted aryl group having 6-50 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5-50 ring-forming atoms; L2 is a single bond, a substituted or unsubstituted arylene group having 6-50 ring-forming carbon atoms, or a divalent substituted or unsubstituted heterocyclic group having 5-50 ring-forming atoms; and D21 is a group represented by the formula (20) in the figure.SELECTED DRAWING: None
Owner:IDEMITSU KOSAN CO LTD

Liquid crystal composition, and liquid crystal display including the same

InactiveUS20160230091A1Improve advancedHigh-rate response characteristicLiquid crystal compositionsNon-linear opticsHalogenSingle bond
Disclosed is a liquid crystal composition. The liquid crystal composition includes liquid crystal molecules including at least one of a liquid crystal compound having an alkenyl group and a liquid crystal compound having an alkoxy group, and a first stabilizer including a compound having a structure represented by Formula 1:where n is 0 or 1; m is 0 or 1; k is 0 or 1; Z1, Z2, and Z3 are each independently a single bond, —C═C—, —OCO—, —COO—, —CF2O—, or a C1 to C5 alkylene group; X1, X2, X3, and X4 are each independently hydrogen or halogen; Y is hydrogen, an alkylene group, an alkoxy group, a hydroxyl group, —NHCOCH3, or ═O; and A and B are cyclic compounds.
Owner:SAMSUNG DISPLAY CO LTD

Nitrogen-containing heterocyclic compound and organic electroluminescent element comprising same

The invention belongs to the technical field of photoelectric materials, and relates to a nitrogen-containing heterocyclic compound and an organic electroluminescent element containing the nitrogen-containing heterocyclic compound. The compound has a structure represented by formula (1): wherein L is selected from a single bond, a substituted or unsubstituted C6-C60 arylene group, and a substituted or unsubstituted C3-C60 heteroarylene group, o is an integer from 1 to 3, and when o is 2 or greater, L are the same as or different from each other. The organic electroluminescent element prepared from the compound has higher current efficiency and longer service life, and can be used as an N-type charge generation layer material for preparing the organic electroluminescent element.
Owner:HAINING INNOVATORS TECH CO LTD

An organic electron acceptor containing a carbazole side chain and its application

The present invention discloses an organic electron acceptor containing a carbazole side chain and its application in solar cells. The organic electron acceptor containing a carbazole side chain has a structure shown in the following formula: #imgabs0# wherein R1 and R2 are independently a linear or branched alkyl group containing 1-18 carbon atoms, and A is an electron-withdrawing functional group. The present invention uses a non-fully fused ring structure based on trithiophene as the central conjugated skeleton of the organic electron acceptor, introduces a carbazole group as a side chain, prevents excessive elevation of the molecular HOMO energy level, and inhibits the internal rotation between the trithiophene rings connected by single bonds through its rigid large steric effect, thereby ensuring the planarity of the acceptor molecule, regulating the stacking between molecules, and simultaneously inhibiting the aromatic amine group from inducing the molecular skeleton to form a quinone structure, thereby improving the molecule's resistance to photooxidation.
Owner:ZHEJIANG UNIV

Organic compound, application thereof and organic electroluminescent device containing organic compound

The invention relates to an organic compound, application of the compound and an organic electroluminescent device containing the compound. The organic compound disclosed by the invention has a structure as shown in a formula (1-1) or a formula (1-2), wherein a ring A, a ring B, a ring C, a ring D and a ring E independently represent one of C5-C60 aromatic rings and C5-C60 heteroaromatic rings; y and Z each independently represent a single bond, a double bond, O, CO, SO2, S, NR1, CR2R3, or SiR4R5; w represents a single bond; x represents N or C; n1, n2 and n3 are respectively and independently selected from 0 or 1. After the compound disclosed by the invention is prepared and applied to the organic electroluminescent device, the device has good performances of high color purity and high luminous efficiency and also has extremely long service life.
Owner:TSINGHUA UNIVERSITY

Organic compound, application thereof and organic electroluminescent device adopting organic compound

The invention relates to an organic compound, application of the compound and an organic electroluminescent device containing the compound. The organic compound disclosed by the invention has a structure as shown in a formula (1), wherein a ring A, a ring B, a ring C, a ring D and a ring E independently represent one of C6-C60 aromatic rings and C5-C60 heteroaromatic rings; w1, W2 and W3 are respectively and independently selected from a single bond, O, CO, SO2, S, Se, NR1, CR2R3 or SiR4R5; and m1, m2 and m3 are respectively and independently 0 or 1. After the compound disclosed by the invention is prepared and applied to the organic electroluminescent device, the device has good performances of high color purity and high luminous efficiency and also has extremely long service life.
Owner:TSINGHUA UNIVERSITY

Thermosetting composition, method for producing molded article, and cured product

A thermosetting composition contains (A) a compound represented by formula (A), (B) a thermal polymerization initiator, and (C) a bromine-based flame retardant. (In formula (A), R1 are each independently a hydrogen atom or a methyl group. R2 are each independently a single bond or a C1-20 alkylene group. Z is a substituted or unsubstituted alicyclic hydrocarbon group having 6-12 ring carbon atoms. n is 1 or 2. When n is 2, the two R1 and the two R 2 may be the same or different.)
Owner:IDEMITSU KOSAN CO LTD

Optical polymer and lens including same

ActiveUS12534575B2MountingsPhotovoltaic energy generationOptical polymersPolymer
A lens includes an optical polymer represented by:where R1 to R3 are each independently hydrogen, deuterium, halogen, or organic group comprising any one selected from substituted or unsubstituted C1-C60 alkyl group, substituted or unsubstituted C3-C60 cycloalkyl group, substituted or unsubstituted C1-C60 alkoxy group, substituted or unsubstituted C6-C60 aryl group, and substituted or unsubstituted C2-C60 heteroaryl group having at least one hetero atom selected from group consisting of N, O, and S, A1 is a single bond, an oxygen atom, or a sulfur atom, A2 is an oxygen atom or sulfur atom, B1 and B2 are each independently a single bond or an organic group represented by -al-D-al-, and n represents an integer of 5 or more and 500 or less, where al is a C1-C8 alkylene group, and D is —S(═O)2—X—, —X—S(═O)2—, —S(═O)2—X—S(═O)2—, —C(═O)—X—, —X—C(═O)—, —C(═O)—X—C(═O)—, carbonyl, alkenylene, alkynylene, ester, or ether, where X is a C6-C60 arylene group.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD +1

Resist composition, method for forming resist pattern, copolymer, and compound

To provide a resist composition and the like which achieve high sensitivity during the formation of a resist pattern and enhances both effects of roughness reduction and film loss suppression.SOLUTION: The present invention employs a resist composition which contains a copolymer that has a constituent unit represented by general formula (a00), a constituent unit represented by general formula (a01), and a constituent unit represented by general formula (a02). In the formulas: R0a, R0b, R01 and R02 are each independently an alkyl group having 1 to 5 carbon atoms, a halogenated alkyl group having 1 to 5 carbon atoms, or a hydrogen atom; L00 and L01 are each independently a divalent linking group or a single bond; L02 is a divalent linking group; RAr is an aromatic group which may have a specific substituent; RX is an acid dissociable group; and Z- is an anion group.SELECTED DRAWING: None
Owner:TOKYO OHKA KOGYO CO LTD

Photosensitive resin composition, resin film having pattern and method for producing same, and semiconductor circuit board

PendingUS20260202742A1PhotosensitizerOrganic group
A photosensitive resin composition contains an alkali-soluble polymer (A), a photosensitizer (B), a crosslinking compound (C) having a crosslinkable group that reacts with a component (D) below by heat, a compound (D) represented by formula (1), and a solvent (E). X11 represents, for example, a nitrogen atom, R11 represents a hydrogen atom or a group represented by formula (2). L21 represents, for example, a single bond, R21 represents, for example, a hydrogen atom, R22 represents a monovalent organic group, and n21 to n23 represent an integer of 0 or more. At least one of three R11's is represented by formula (2), and in at least one group represented by formula (2), n21 is an integer of 1 or more, and at least one R21 is a hydrogen atom.
Owner:JSR CORPORATION

Compound, light-emitting material, and light-emitting element

A compound of the following general formula is used in an organic light-emitting element. X1 to X3 represent N or C (R); r represents H, D or a substituent; x4 represents N or C (R1), X5 represents N or C (R2), X6 represents N or C (R3), and only one of X4 to X6 is N; r1-R5 are H, D, a cyano group, an alkyl group, an aryl group or a donor group, one or more of R1-R5 are cyano groups, and one or more of R1-R5 are donor groups; one or more of Ar1 and Ar2 are heteroaryl groups bonded via N; and L1 represents a single bond or a linking group.
Owner:KYULUX INC

A boron-nitrogen compound based on a double-heteroanthracene fused ring aromatic hydrocarbon and an electroluminescent device thereof

The present application relates to the technical field of organic electroluminescence, and discloses a boron-nitrogen compound based on a double-heteroanthracene fused ring arene and an electroluminescent device thereof.The compound has a structure represented by HU, wherein H has a structure of formula 1-1, and U is selected from a structure of formula 2, wherein any two adjacent single bonds in the structure formula U are connected with the '' in the structure formula H, X and Y are the same or different at each occurrence and are selected from a single bond, O, S, Se, NR', CR''R''' or SiR''R'''', and combinations thereof.The OLED device prepared by using the compound has a low starting voltage, high luminous efficiency and a more optimal service life.
Owner:SOUTH CHINA UNIV OF TECH

Heterocyclic compound containing heteroatom substituted fluorene and optoelectronic device

A heterocyclic compound containing heteroatom substituted fluorene and an optoelectronic device are provided. The heterocyclic compound includes a structure in Formula I:where Y is selected from O or S; at least one of X1, X2, X3, X4, X5, X6, X7 and X8 is a N atom, and rest are CR2; L1, L2, and L3 are independently selected from single bond, substituted or unsubstituted aromatic groups; Ar1 and Ar2 are independently selected from substituted or unsubstituted aromatic groups or heteroaryl groups; R1 is selected from a hydrogen atom, a deuterium atom, or an aromatic group or a heteroaryl group condensed with adjacent groups; and R2 is selected from a hydrogen atom, a deuterium atom, a substituted or unsubstituted C1-C5 alkyl group, a halogen, a cyano group, or an amino group.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD

A composition and fracturing fluid containing the same

The present application provides a composition and a fracturing fluid containing the same. The composition provided by the present application comprises ammonium chloride, sodium nitrite and a flow enhancer. The flow enhancer is a chemical loading product of a compound shown in a structural diagram as Formula I on nano-silicon dioxide; wherein A is an optionally substituted naphthalene ring; n is an integer from 1 to 10; n R is independently selected from one of a chemical single bond and a C1 to C 10 alkylene group; and n X is independently selected from -O- or -NH-, and at least one X is -NH-. The fracturing fluid comprises the composition, a thickening agent, a clay stabilizer, a cleanup agent, a crosslinking agent, a pH regulator and water.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Catalyst for synthesizing polyimide, and preparation method and application thereof

The application provides a catalyst for synthesizing polyimide, and a structural formula of the catalyst is shown as formula (I): wherein, Ar 1 , Ar 2 are independently selected from substituted or unsubstituted aryl or substituted or unsubstituted heterocyclic aryl, R1 is oxygen, sulfur, sulfone group, sulfoxide group, carbonyl group, secondary amine group, alkylene group, alkenylene group, alkinylene group, alicyclic group, heterocyclic aryl group, fused ring aryl group or single bond. The catalyst has high reactivity, and a small amount of the catalyst is used in the synthesis of polyimide, so that the film forming property of the polyimide is not affected. The application further provides a preparation method and application of the catalyst for synthesizing polyimide.
Owner:BYD CO LTD

Polymeric composition having resistance to both NOX discoloration and extrusion-processing degradation

PCT designated stage expiredWO2025183667A3ThermoplasticAryl
A composition having: a thermoplastic; a first chemical compound having the structure: (I) wherein, each R1, R2, R4, and R3 is independently selected and is a hydrogen atom, a C1-8 alkyl moiety, a C5-8 cycloalkyl moiety, a C6-12 alkylcycloalkyl moiety, a C7-12 arylalkyl moiety, or a C6- 14 aryl moiety; each R3 is independently selected and is a hydrogen atom or a C1-8 alkyl moiety; X is a single bond, a sulfur atom, or a CHR6 moiety, wherein R6 is a hydrogen atom, a C1-8 alkyl moiety, or a C5-8 cycloalkyl moiety; A is a C2-8 alkylene moiety or an *COR7 moiety, wherein R7 is a single bond or a C1-8 alkylene moiety, and wherein the "*" character is used to confirm the positional understanding that the "C" atom in the "*COR7 moiety" is bonded to the adjacent "O" atom shown in the main structure; and one of ¥ and Z is a hydroxy moiety, a C1-8 alkoxy moiety or a C7-12 arylalkyloxy moiety, and the other is a hydrogen atom or a C1-8 alkyl moiety, and a second chemical compound having the structure: (II) wherein, each R is independently selected and is a C1-C20 alkyl moiety, a C6-C20 aryl moiety, C6-C20 alkylaryl moiety, a methyl moiety, a tertiary butyl moiety, a cumyl moiety, or a hydrogen atom.
Owner:DOVER CHEM CORP +1

Resist composition and method for producing resist pattern

A resist composition includes (A1) a resin including a structural unit represented by formula (I) and a structural unit represented by formula (II), and no acid-labile group, (A2) a resin having an acid-labile group, and an acid generator:wherein R1 and R2 each represent a hydrogen atom, a halogen atom, or an alkyl group which may have a halogen atom, X1 and X2 each represent a single bond or *—CO—O—, L1 represents a single bond or a hydrocarbon group which may have a substituent, and —CH2— included in the group may be replaced by —O—, —S—, —SO2— or —CO—, ring W represents a hydrocarbon ring which may have a substituent, mi and mk represent an integer of 1 to 4, and L2 represents a single bond or a hydrocarbon group which may have a substituent, and —CH2— included in the group may be replaced by —O—, —S—, —SO2— or —CO—.
Owner:SUMITOMO CHEM CO LTD

Poly(amide-imide) copolymer, composition and polymer film comprising thereof

ActiveUS12404371B2ImidePolymer science
The present disclosure relates to a poly(amide-imide) copolymer in which each of at least one of imide repeating units and at least one of amide repeating units is substituted with a functional group including Chemical Formula 1,wherein, R1 is hydrogen or an alkyl group having 1 to 10 carbon atoms, and L is a single bond or an alkylene having 1 to 10 carbon atoms, and a composition and a polymer film comprising the same.
Owner:LG CHEM LTD

Resist composition, resist pattern formation method, compound, and polymer compound

PCT designated stageWO2026141175A1SolubilityPolymer science
Disclosed is a resist composition that generates an acid upon exposure to light, and of which the solubility in a developer solution is changed by the action of the acid, the resist composition comprising a resin component (A1) of which the solubility in a developer solution is changed by the action of the acid, and the resin component (A1) having a constituent unit (a0) derived from a compound represented by general formula (a0). In the formula, W0 represents a polymerizable group-containing group; X0 represents a hydrogen atom or an alkyl group; Ar01 represents an arylene group that may have a substituent; L01 represents a single bond or a divalent linking group; Rpg0 represents an acid-dissociable group; and n0 represents an integer of 2 or greater as long as permitted by the valence.
Owner:TOKYO OHKA KOGYO CO LTD

Compound and organic electroluminescent device

The present invention belongs to the technical field of organic electroluminescence. Disclosed are a compound and an organic electroluminescent device. The general structural formula of the compound is shown in formula (1): formula (1), where: X is selected from NRa, CRbRc, O, S or Se; ET represents an electron-withdrawing group; L is selected from a single bond, a substituted or unsubstituted C6-C60 arylidene group or a substituted or unsubstituted C3-C60 heteroarylene group; ring A is selected from the structure shown in formula (2) or formula (3); formula (2), formula (3); X1-X12 are independently selected from CR0 or N; and there are two adjacent sites in X1-X4, X5-X6, X7-X8 and X9-X12 that are fused with a 5-membered ring containing X in formula (1). The described compound has the advantages of high optical and electrical stability, low sublimation temperature, low driving voltage, high luminous efficiency, long device life, etc., and can be used as a red light host material in OLED light-emitting devices.
Owner:GUANGDONG AGLAIA OPTOELECTRONICS MATERIALS

Photoacid generators, photoresist compositions, and pattern formation methods

Photoacid generators comprising a moiety of formula (1):wherein: Ar1 is a substituted or unsubstituted aryl group; R1 is an alkyl or aryl group, each of which may be substituted or unsubstituted, wherein Ar1 and R1 are optionally connected together by a single bond or a divalent linking group to form a ring; Y is a single bond or a divalent group; and * is the point of attachment of the moiety to another atom of the photoacid generator. The photoacid generator compounds find particular use in photoresist compositions that can be used to form lithographic patterns for the formation of electronic devices.
Owner:DUPONT ELECTRONIC MATERIALS INT LLC

Monomer, resin for photoresist, resin composition for photoresist, and pattern forming method

Provided is a monomer that improves solubility in organic solvents, hydrolyzability, and solubility in water after hydrolysis of a resin as well as imparts higher heat resistance to a resin. A resin for a photoresist containing a polymerization unit represented by Formula (Y), wherein Rh represents a halogen atom or an alkyl group having from 1 to 6 carbons and having a halogen atom; R1 is a substituent attached to a ring and represents a halogen atom, an alkyl group that has from 1 to 6 carbons and may have a halogen atom, a hydroxyalkyl group that has from 1 to 6 carbons and may have a halogen atom and has a hydroxyl group moiety which may be protected by a protecting group, a carboxyl group that may form a salt, or a substituted oxycarbonyl group; A represents an alkylene group having from 1 to 6 carbons, an oxygen atom, a sulfur atom, or no bond; m is the number of R1 and represents an integer from 0 to 8; X represents an electron-withdrawing substituent; n is the number of X and represents an integer from 1 to 9; B represents a single bond or a linking group; and a steric position of a COOB-group attached to a polymer chain may be either endo or exo.
Owner:DAICEL CORP

Arylamine compound, organic electroluminescent device containing same and electronic equipment

According to the arylamine compound with the structure shown in the formula (1), the compound is applied to an organic electroluminescent device as a second hole transport layer material, and performance improvement of the organic electroluminescent device can be achieved. Wherein A1 is selected from a substituted or unsubstituted C6-C14 aromatic ring, A2 is selected from a substituted or unsubstituted C10-C14 aromatic ring, L1 and L2 are respectively and independently selected from a single bond, a substituted or unsubstituted C6-C30 arylene group and a substituted or unsubstituted C3-C30 heteroarylene group, L3 and L5 are respectively and independently selected from a substituted or unsubstituted C6-C30 arylene group, and L5 is selected from a substituted or unsubstituted C6-C30 heteroarylene group. L4 is selected from substituted or unsubstituted dibenzofuranylidene and substituted or unsubstituted dibenzothienyl, and Ar1 and Ar2 are respectively and independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C6-C30 aryl and substituted or unsubstituted C3-C30 heteroaryl.
Owner:HAINING INNOVATORS TECH CO LTD

Onium salt, photoacid generator, chemically amplified resist composition, and pattern forming method

The invention relates to an onium salt, a photoacid generator, a chemically amplified resist composition and a pattern forming method. The present invention is an onium salt represented by general formula (A). Thereby, provided is an onium salt used in a chemically amplified resist composition having excellent lithography performance such as high sensitivity, CDU, MEEF, and LWR in optical lithography using high-energy rays. In the formula, m1 is an integer of 1-4. And m2 is 1 or 2. R1 represents an electron-withdrawing group such as a hydrogen atom, a hydrocarbon group, or a cyano group; lA and LB each represents a single bond, a carbonyl group, an ether bond, an ester bond, an amide bond, a sulfonate bond, a sulfonamide bond, a carbonate bond, a urethane bond, or a hydrocarbylene group. W1 is a hydrocarbylene group containing an alicyclic structure, and a carbon atom forming the alicyclic structure has two atomic bonds. And W2 is a hydrocarbon group containing an alicyclic structure. Z + is an onium cation.
Owner:SHIN ETSU CHEMICAL CO LTD

Salt, acid generator, resist composition and method for producing resist pattern

Provided are a salt capable of producing a resist pattern with satisfactory CD Uniformity (CDU), an acid generator, and a resist composition. Disclosed are a salt represented by formula (I), an acid generator, and a resist composition:wherein, in formula (I), R4, R5, R6, R7, R8 and R9 each represent a halogen atom, a haloalkyl group, etc.; A1, A2 and A3 each represent a hydrocarbon group, etc.; m1 and m4, m5, m6 and m7 represent an integer of 0 to 5, m2, m3, m8 and m9 represent an integer of 0 to 4, 0≤m1+m7≤5, 0≤m2+m8≤4, 0≤m3+m9≤4, and at least one of m1, m2 and m3 represents an integer of 1 or more; X4 represents a single bond, —CH2—, —O—, —S—, —CO—, —SO— or —SO2—; and AI− represents an organic anion.
Owner:SUMITOMO CHEM CO LTD

Radiation-sensitive composition, pattern forming method, and onium salt

The invention provides a radiation-sensitive composition, a pattern forming method and an onium salt which can form a resist film or pattern with excellent sensitivity or LWR performance, DOF performance, pattern rectangularity, CDU performance, pattern roundness, EL performance and pattern collapse resistance. A radiation-sensitive composition containing an onium salt represented by formula (1), a polymer containing a structural unit (I) having an acid-dissociable group, and a solvent (in formula (1), Q1 and Q2 are each independently a carbon atom or a nitrogen atom; wherein at least one of Q1 and Q2 is a carbon atom; w represents a monocyclic or polycyclic non-aromatic ring structure having 3-40 ring members, which is configured together with Q1 and Q2 in the formula; in the formula, the following formula between Q1 and Q2 represents a single bond or a double bond; (AAA) R1 is a monovalent organic group having 1-20 carbon atoms, a nitro group, a hydroxyl group, an amino group, a thiol group, a cyano group, a carboxyl group or a halogen atom; when a plurality of R1 are present, the plurality of R1 are the same as or different from each other; m1 is an integer of 0-4; and Z + represents a monovalent onium cation). # imgabs0 #
Owner:JSR CORPORATION

Mixture, composition, organic compound constituting same, and use thereof in organic electronic device

Disclosed in the present invention is a mixture, comprising at least one first compound H1 represented by formula (I) or formula (III), and at least one second compound H2 represented by formula (II). The mixture according to the present invention, as a phosphorescent light-emitting host material, can properly balance hole and electron transport and prevent exciton diffusion, thereby improving the efficiency of a blue phosphorescent device and prolonging the device life. The present invention further relates to a composition and an organic electronic device, particularly an organic electroluminescent device. The present invention further relates to an organic compound, comprising an aza or non-aza oxygen-containing fused ring and 3,9'-bicarbazole, wherein the oxygen-containing fused ring and the 3,9'-bicarbazole portions are linked via a single bond or a bridging group. Due to the relatively high stability and appropriate energy level characteristics, the organic compound can be used as a non-luminescent material of a blue phosphorescent OLED to improve device performance.
Owner:ZHEJIANG BRILLIANT OPTOELECTRONIC TECH CO LTD

Resist composition, method for manufacturing a resist pattern, and salt

Provided are a salt capable of producing a resist pattern having good CD uniformity and a resist composition containing the same. 【Solution means】A resist composition containing a salt represented by formula (I). TIFF2026059011000159.tif53158 [In the formula, Q 1 , Q 2 , Q 11 , Q 12 , R 1 , R 2 , R 11 and R 12 are each a hydrogen atom, a fluorine atom, a perfluoroalkyl group, etc.; z and z1 are each an integer from 0 to 6; X 0 and X 01 are each -O-, -CO-, etc.; mm1 and mm2 are each 0 or 1; L 1 and L 01 are each a single bond or a substituted / unsubstituted hydrocarbon group.]
Owner:SUMITOMO CHEM CO LTD

Copolymer, positive resist composition, and method of forming resist pattern

A copolymer includes a monomer unit (A) represented by formula (I), shown below, and a monomer unit (B) represented by formula (II), shown below, and has a weight-average molecular weight of 230,000 or more. In the formulae, L is a single bond or a divalent linking group, Ar is an optionally substituted aromatic ring group, R1 is an alkyl group, R2 is hydrogen, an alkyl group, a halogen atom, a haloalkyl group, a hydroxy group, a carboxy group, or a halocarboxy group, p is an integer of not less than 0 and not more than 5, and in a case in which more than one R2 is present, each R2 may be the same or different.
Owner:ZEON CORP