A method of blackening a surface, comprises applying laser radiation to the surface of a target (10) to produce a periodic arrangement of structures on the surface of the target (10), wherein the laser radiation comprises pulsed laser radiation comprising a series of laser pulses and the power density of the pulses is in a range 2 GW/ cm2 to 50 GW/cm2 or 0.1 TW/cm2 to 3 TW/cmz, and/or a pulse duration between 200 femtoseconds to 1000 picoseconds.
|Patent number||WO2016/207659 A1|
|IPC||B23K 26/00 (2014.01)|
|Publication status||Published - 29 Dec 2016|
Abdolvand, A. (2016). IPC No. B23K 26/00 (2014.01). Method of, and apparatus for, laser blackening of a surface, wherein the laser has a specific power density and/or a specific pulse duration. (Patent No. WO2016/207659 A1).