Patent ID: 8376518

Claim:
A liquid discharge head comprising: a substrate having, on one side thereof, energy generating elements for generating energy used for discharging liquid; and a sealing member arranged in contact with at least a part of one or more end faces of the substrate, the sealing member being a cured product of a composition comprising an epoxy resin expressed by at least any one of formula (1), (3) and (4) and an epoxy resin curing agent expressed by at least any one of (2), (5) and (6) wherein X represents an integer from 1 to 100 inclusive, and Y represents an integer from 0 to 100 inclusive; wherein R represents H or an alkyl group, a and b each represent an integer from 1 to 100 inclusive, and c and d each represent an integer from 0 to 100 inclusive; wherein e represents an integer from 24 to 35 inclusive, and f represents an integer from 8 to 11 inclusive; wherein g represents an integer from 10 to 30 inclusive, and h represents an integer from 1 to 4 inclusive; wherein i and j each represent an integer from 1 to 100 inclusive, and k represents an integer from 0 to 100 inclusive; wherein m represents an integer from 1 to 100 inclusive, and n represents an integer from 0 to 100 inclusive.