Patent ID: 11914295
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. A composition for forming a silicon-containing resist underlayer film for EUV lithography, comprising:
a thermosetting silicon-containing material; and
a crosslinking catalyst, wherein
the thermosetting silicon-containing material comprises one or more of
a repeating unit shown by the following general formula (Sx-1′),
a repeating unit shown by the following general formula (Sx-2), and
a partial structure shown by the following general formula (Sx-3):, , wherein R1 represents an iodine-containing organic group shown by the following general formula (Sx-R1):, , wherein R11 represents a divalent organic group other than a methylene group; R12 represents a monovalent organic group having 1 to 10 carbon atoms, a hydroxyl group, or a halogen atom other than iodine; n1 is 1, 2, or 3; and n2 is 0, 1, or 2;, R1′ represents an iodine-containing organic group shown by the following general formula (Sx-R1′):, , R2 and R3 are each independently identical to R1, a hydrogen atom, or a monovalent organic group having 1 to 30 carbon atoms, and, R11′ represents an ethylene (—CH2CH2—) group; R12′ represents a monovalent organic group having 1 to 10 carbon atoms, a hydroxyl group, or a halogen atom other than iodine; n1 is 1, 2 or 3; and n2′is 0, 1, or 2.