Laser-assisted selective metallisation of diamonds by electroless Ni and Cu plating

Results are presented on area-selective metallisation of diamond single crystals and CVD diamond films realised by means of electroless metal deposition onto laser-activated diamond surfaces. Two techniques of laser activation of the diamond surface are applied: (1) prenucleation of the surface with a thin layer of Pd catalyst via laser-induced decomposition of a corresponding acetyl-acetonate solid film, and (2) laser-induced damage of the diamond surface. The activated surface is characterised with Auger spectra and X-ray microanalysis techniques. The possible mechanisms of surface activation are discussed along with alternative methods of diamond activation for electroless plating. The adherence strength of the Cu deposit is 1.5–2 N/mm2.