Patent ID: 7071266

Claim:
A curable resin composition containing a polyfunctional cyanate ester resin and a bifunctional phenylene ether oligomer having a number average molecular weight of 500 to 3,000 and having a specific structure represented by the formula (1), H— O—Y a O—X—O Y—O b —H (1) wherein —(O—X—O)— is represented by the formula (2) (in which R 1 , R 2 , R 7 and R 8 may be the same or different and are a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, R 3 , R 4 , R 5 and R 6 may be the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, and A is a linear, branched or cyclic hydrocarbon having 20 or less carbon atoms or a direct bond), —(Y—O)— is an arrangement of one kind of structure defined by the formula (3) or a random arrangement of at least two kinds of structures defined by the formula (3) (in which R 9 and R 10 may be the same or different and are a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group and R 11 and R 12 may be the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group), and each of a and b is an integer of 0 to 30, provided that at least either a or b is not 0.