Patent ID: 7144970

Claim:
An insulating-film forming material comprising a resin (A) that has a structure represented by general formula (I): wherein Y 1 , Y 2 , Ar 1 and Ar 2 are the same or different; each of Y 1 , Y 2 , Ar 1 and Ar 2 represents an aromatic ring-containing divalent organic group; at least one of Y 1 and Y 2 is selected from the group consisting of formulae (Y-1), (Y-2), (Y-3) and (Y-4); m and n each indicates a molar percentage of the repeating units; and m falls between 0 and 100 with (m+n)=100; in formulae (Y-1) and (Y-2), Ral 1 to Ral 4 each represents a monovalent hydrocarbon group not containing an aromatic ring; Rar 1 and Rar 2 each represents an aromatic ring-containing monovalent hydrocarbon group; Ral 1 to Ral 4 , Rar 1 and Rar 2 may bond to each other to form a ring; and p, q, r, s, p′ and q′ each indicates an integer of from 0 to 3; and in formulae (Y-3) and (Y-4), Ral 1 and Ral 2 each represents a monovalent hydrocarbon group not containing an aromatic ring; Rar 1 and Rar 2 each represents an aromatic ring-containing monovalent hydrocarbon group; Ral 1 , Ral 2 , Rar 1 and Rar 2 may bond to each other to form a ring; t and u each indicates an integer of from 1 to 4; and v and w each indicates an integer of from 0 to 4.