Patent ID: 7150947

Claim:
A photosensitive polymer composition, comprising: (a) a polymer selected from polyimide precursors that contain repeating units of the following general formula (I) where R 1 represents a tetra-valent aliphatic group, R 2 represents a di-valent organic group, and two R 3 s represent each independently a hydrogen atom or a mono-valent organic group, and polyimides having repeating units of the following general formula (II): where R 4 represents a tetra-valent aliphatic group, and R 5 represents a di-valent organic group, wherein the polymer has an acid group protected by a protecting group at any end thereof, has no amino group (—NH 2 ) at any end thereof, and has no reactive protecting group at any end thereof; and (b) a compound that generates an acid when exposed to light and capable of deprotecting the protecting group from the acid group.