New fluorine-containing azopyridone dyes, 3-cyano-6-hydroxy-5-[2-(perfluoroalkyl)phenylazo]-2-pyridones, have been synthesized. Though the introduction of a long perfluoroalkyl group lowered film forming ability and sensitivity, 5-[2-(trifluoromethyl)phenylazo]- and 5-[2-(perfluorobutyl)phenylazo]-3-cyano-4-methyl-6-hydroxy-2-pyridones showed good photostability.

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Polymer(polyamide)-metal(Sn) composite thin films have been deposited by a new pulsed excimer laser copulation method. The composite character of the films has been established by the combined use of infrared transmission, x-ray diffraction, Mössbauer spectroscopy, and scanning electron microscopy combined with energy dispersive analysis of x rays.