Soluble Polyimide for photosensitive polyimide and photosensitive polyimide composition comprising the soluble polyimide

摘要

PURPOSE: Provided is a soluble polyimide, which manifests high resolution and low film shrinkage on curing a micropattern, and gives a film having excellent chemical and physical properties after curing. CONSTITUTION: The soluble polyimide for a photosensitive polyimide precursor is represented by formula 1 and comprises a reactive end-capping group at either or both ends thereof, wherein X is a tetravalent aromatic or aliphatic organo-group; Y is a divalent aromatic or aliphatic organo-group; each of R1 and R2 is H or a monovalent organo-group of CH2OR3, in which R3 is a C6 or lower alkyl group, if both R1 and R2 are not H; and m is an integer of 10 to 1000.