Abstract: A method for forming a protective film includes directly or indirectly coating only a periphery of a substrate with a composition. The composition includes a compound having an aromatic ring, and a solvent. The solvent includes a first solvent having a normal boiling point of 156° C. or higher and lower than 300° C. A content of the first solvent in the solvent is preferably 20 mass % or more and 100 mass % or less. The first solvent is preferably an ester, an alcohol, an ether, a carbonate, or a combination of two or more of an ester, an alcohol, an ether, and a carbonate.

Abstract: A pattern-forming method comprises: forming a resist underlayer film on an upper face side of a substrate; forming a silicon-containing film on an upper face side of the resist underlayer film; and removing the silicon-containing film with a basic aqueous solution. The pattern-forming method does not include, after the forming of the silicon-containing film and before the removing of the silicon-containing film, treating the silicon-containing film with a treatment liquid comprising an acid or a fluorine compound. The silicon-containing film is preferably formed a hydrolytic condensation product of a composition containing a compound represented by formula (1) in an amount of no less than 60 mol % with respect to total silicon compounds. X represents a halogen atom or —OR2, and R2 represents a monovalent organic group.

Abstract: A pattern-forming method comprises: forming a resist underlayer film on an upper face side of a substrate; forming a silicon-containing film on an upper face side of the resist underlayer film; and removing the silicon-containing film with a basic aqueous solution. The pattern-forming method does not include, after the forming of the silicon-containing film and before the removing of the silicon-containing film, treating the silicon-containing film with a treatment liquid comprising an acid or a fluorine compound. The silicon-containing film is preferably formed a hydrolytic condensation product of a composition containing a compound represented by formula (1) in an amount of no less than 60 mol % with respect to total silicon compounds. X represents a halogen atom or —OR2, and R2 represents a monovalent organic group.

Abstract: A silicon-containing film-forming composition includes a polysiloxane and organic solvent. The polysiloxane includes a first structural unit, a second structural unit, and a third structural unit. The first structural unit is derived from a tetraalkoxysilane. The second structural unit is derived from a compound shown by a formula (1), wherein R1 represents a hydrogen atom or an electron-donating group, at least one R1 is an electron-donating group, R2 represents a monovalent organic group, and n represents 0 or 1. The third structural unit is derived from a compound shown by a formula (2), wherein R3 represents an alkyl group having 1 to 8 carbon atoms, and R4 represents a monovalent organic group.

Abstract: A silicon-containing film-forming composition includes a polysiloxane and organic solvent. The polysiloxane includes a first structural unit, a second structural unit, and a third structural unit. The first structural unit is derived from a tetraalkoxysilane. The second structural unit is derived from a compound shown by a formula (1), wherein R1 represents a hydrogen atom or an electron-donating group, at least one R1 is an electron-donating group, R2 represents a monovalent organic group, and n represents 0 or 1. The third structural unit is derived from a compound shown by a formula (2), wherein R3 represents an alkyl group having 1 to 8 carbon atoms, and R4 represents a monovalent organic group.

Abstract: A silicon-containing film-forming composition includes a polysiloxane and organic solvent. The polysiloxane includes a first structural unit, a second structural unit, and a third structural unit. The first structural unit is derived from a tetraalkoxysilane. The second structural unit is derived from a compound shown by a formula (1), wherein R1 represents a hydrogen atom or an electron-donating group, at least one R1 is an electron-donating group, R2 represents a monovalent organic group, and n represents 0 or 1. The third structural unit is derived from a compound shown by a formula (2), wherein R3 represents an alkyl group having 1 to 8 carbon atoms, and R4 represents a monovalent organic group.