Evaporated copper on surface modi®ed polyaniline ®lms

In order to improve the adhesion between the emeraldine base (EB) ®lm of polyaniline (PANI) and evaporated copper metal, surface modi®cation of EB ®lms via UV-induced graft copolymerization with glycidyl methacrylate (GMA) was carried out. The effects of GMA monomer concentration and UV graft copolymerization time on the T-peel adhesion strength of the resulting Cu/EB laminates were studied. It was found that the adhesion strength between the GMA graft-copolymerized EB (GMA-g-EB) ®lm and evaporated copper increased monotonically with the graft concentration of the GMA polymer. The T-peel adhesion strength between the surface-modi®ed EB ®lm and evaporated copper was increased by almost 10-folds under the optimum surface modi®cation conditions. The chemical compositions of the GMA-g-EB surfaces were studied by X-Ray photoelectron spectroscopy (XPS). The interaction between the GMA-g-EB surface and the deposited copper atoms was investigated in situ by XPS. The epoxide groups of the grafted GMA polymer interacted with the evaporated copper atoms to form a charge-transfer complex, which accounted for the enhanced adhesion of evaporated copper to the GMA-g-EB ®lms. # 2001 Elsevier Science B.V. All rights reserved.