To provide a fluorinated aromatic polymer having excellent heat resistance and a low relative permittivity; and an insulating film for electronic devices and an insulating film for multilayered wiring boards, which are made of the polymer. A fluorinated aromatic polymer which contains two or more crosslinkable functional groups (A) per molecule and has a number average molecular weight of from 1×10
3
to 5×10
5
and an ether linkage and which is produced by e.g. a method in which a branched fluorinated aromatic compound (B) represented by the formula 1 and a compound (Y1) having a crosslinkable functional group (A) and a phenolic hydroxyl group, are subjected to a condensation reaction in the presence of a HF-removing agent:
1
提供一种具有优异耐热性和低相对介电常数的含
氟芳香族聚合物,以及由该聚合物制成的电子设备绝缘膜和多层布线板绝缘膜。一种
氟化芳香族聚合物,其每个分子含有两个或两个以上的可交联官能团(A),其平均分子量为 1×10
3
至 5×10
5
的支链
氟化芳香族化合物(B)和具有可交联官能团(A)和
酚羟基的化合物(Y1),在
氢氟酸脱除剂存在下进行缩合反应:
1