Laser ablation behavior and mechanism of polyimide by UV irradiation

A research focused on ablation characteristics of polyimide (PI) film induced by a nanosecond ultraviolet (UV) laser was presented. The effect of varying the laser power (P), scanning speed (S) and their combined impact – linear laser energy density (LLED) on the ablation behavior on PI was investigated. The characteristics of both photothermal and photochemical ablation regimes were observed, which extremely depend on LLED. A relatively narrow...