PROCESS FOR MAKING PHOTOPOLYMERIZABLE AROMATIC POLYAMIC ACID DERIVATIVES

摘要

A process for the synthesis of the photosensitive polyamic acid derivatives which are polyimide precursors, comprising the sequential steps: (1) Partially derivatizing an aromatic dianhydride with a reactive monomer containing a photosensitive moiety; (2) Condensation polymerizing the partially derivatized aromatic dianhydride with aromatic diamine to form polyamic acid; (3) Isoimidization of the polyamic acid; (4) Condensation of the polyisoimide to polyamic acid derivative by reaction with additional reactive monomer; and (5) Separation of the polyamic acid derivative.