With the established technique of laser in science and industry, its applications have become diversified in the micro- and macro-processing areas. Three potential lasers CO2/Nd- YAG/Excimer operating in the ir and uv region have been applied in various domains covering different spectrum of industrial applications. Of this the processing with the CO2/Nd-YAG lasers usually considered as thermal processing covers mainly cutting/welding and surface modification areas. Whereas the excimer laser operating in the uv region and having a unique characteristics of cold ablation, allows the production of small um order microstructures. In all these processes the beam interaction time with the material greatly affects the structural development of the end product. The present paper elaborate a few of these basic processes and explore the possibilities of current and new application areas.