| 摘要 |
PURPOSE:To enhance heat resistance and electric and mechanical characteristics of the composition for forming an interlayer insulating film and a surface protective layer by using a photosensitive adduct obtained by reacting a specified polymer with a specified isocyanate compound. CONSTITUTION:This composition contains the photosensitive adduct obtained by reacting the polymer having the repeating units each represented by formula I with the isocyanate compound having an ethylenically unsaturated group, such as isocyanatoethyl methacrylate, and a photoinitiator, such as 2,4- diethylthioxanthone. In formula I, R1 is a tetravalent aromatic tetracarboxylic acid group, and R2 is a divalent aromatic diamine group, and it is preferred to use a group of formula II for R1, and for R2 a group including formula III in which each of X1 - X4 is H or alkyl. A polymerizable unsaturated compound and an auxiliary photoinitiator can be added to the composition when needed. |
