NOISE INVESTIGATION OF ULTRAVIOLET-LASER INDUCED GRAIN-STRUCTURE IN POLYIMIDE FILMS

The ultraviolet laser treatment of polyimide films can lead to the for mation of conductive area. The conductive layers show a carbon-rich gr ain structure. The heat treatment was carried out in air and nitrogen atmosphere. Morphology of conductive layers was investigated by scanni ng electron microscopy and transmission electron microscopy. On laser induced conductive layer, electrical noise investigation was carried o ut. Our investigation shows that laser induced layers have 1/f noise s pectra. According to our results, conductive layers prepared in nitrog en atmosphere have better stability than those prepared in air.