This paper presents the analysis of the impact of selected process parameters on the resulting laser color marking. The
study was conducted for AISI 304 multipurpose stainless steel using a commercially available industrial fiber laser. It
was determined how various process parameters, such as laser power, scanning speed of the laser beam, temperature of
the material, location of the sample relative to the focal plane, affect the repeatability of the colors obtained. For
objective assessment of color changes, an optical spectrometer and the CIE color difference parameter ΔEab
* were used.
This paper presents another technique of manufacturing the unit cells of spiral-shaped resonators - SR on the aluminium nitride (AlN) ceramics. In this technique the AlN plane surface is irradiated by the Nd:YAG (1.06 μm). As a result of the supplied energy, the rupture of aluminium and nitrogen bonds occurs. Consequently, on the dielectric surface the conductive aluminium "paths" are formed. Obtaining the low-ohm conductive structures allows deploying this method to manufacture SR structures which can be used in antennas in order to reduce their coupling. An advantage of the demonstrated method is a possibility of selective and direct metallization of the AlN ceramics surface without a mask as it is required in photolithography process, which greatly reduces the implementation time of the projected metamaterials structures.