Abstract :
A bulk polyimide system prepared by pressing of the precursor monomers 4,40-oxidianiline (ODA) and 1,2,4,5-
benzenetetracarboxylic or pyromellitic dianhydride (PMDA) mixtures has been investigated. The synthesized bulk polyimide
is formed as a result of a polycondensation reaction of monomers in solid state phase. A change of the monomers
polycrystalline structure to an amorphous one of the bulk polyimide after imidization is established. The possibility for
excimer laser microstructuring by drilling at various diameters and depths is demonstrated. The scanning electron microscopic
observations reveal alterations in the so formed blind holes as a consequence of the laser action parameters variation. The
changes observed and the dependencies obtained are discussed. # 2000 Elsevier Science B.V. All rights reserved.
