LASER MARKING USING ORGANOMETALLIC FILMS

In this work, the technical aspects of laser marking using organometal lic films of different compositions are reported. Orasols of different types and palladium (II) acetate ave used, for the first time, to pro duce permanent markings of various colors on different substrates. Cer amic and plastic substrates were used. The deposition process is a pho tothermal process and the markings were carried out using an argon ion laser operating at lambda = 514 nm. Two laser marking techniques are used with the orasol dyes and palladium (II) acetate. The first of the se two techniques is mask marking, where laser light is projected onto a workpiece through a mask replicating the information to be marked. The second technique applied is real-lime motion marking. The workpiec e was translated under the stationary laser beam using a programmable stage translator. For both techniques, optimum marking parameters (sca nning speed/exposure time, power, and deposited line width) are report ed along with typical examples.