A study on preparation of ultra-thin localized Au coating by laser-induced electrodeposition

Experimental Investigation on Laser-Induced Electrochemical Silver Plating Technology

“…The silver coating process involves more variables and can be more difficult. In addition, the previous laser scanning method of Guo et al did not apply to the preparation of localized silver coatings by laser-induced electrodeposition in this experiment. In this paper, the principles of laser-induced electrodeposition for the preparation of localized silver coatings are presented, the effects of different laser scanning methods on the surface morphology of silver coatings are investigated, and the effects of laser single pulse energy on the surface morphology, element content, thickness, dimensional accuracy, and corrosion resistance of silver coatings are discussed.…”

“…Dai et al 17 prepared Cu−Al 2 O 3 nanocomposite coatings using the microzonal stirring effect of the laser, where the deposition current increased rapidly when the laser irradiated the solution, while the pores and size of the composite coatings prepared by laser-assisted plating gradually decreased with increasing laser energy. Guo et al 14 prepared a local ultrathin gold coating by a laser-induced electrodeposition system and studied the effect of laser thermal effect on induced electrodeposition and found that laser irradiation made the temperature in the irradiated area increase by 50−70 °C, the current in the deposition system increased by 0.6 mA, the temperature increase made the cathode overpotential increase, the deposition speed was accelerated, and a high-quality surface coating was obtained.…”

“…It is noted that resolution can be easily controlled, and a wide range of structural dimensions can be achieved by varying the laser power and fixing the spot size. The introduction of lasers in the field of electrodeposition reduces the energy barrier of metal ion reduction. − Von Gutfeld et al found that laser irradiation during electrodeposition can significantly increase the current density in the irradiated region, and the maskless preparation of metal patterns was successfully achieved by laser scanning. Gupta et al used a green laser for unmasked copper plating on stainless steel surfaces, noting that the thickness of the plated layer depends on the time of plating and the incident laser power density, while excessive laser power brings about the removal of the material and lateral thermal diffusion.…”

“…Currently, many studies have focused on laser-enhanced electrodeposition to improve coating quality and laser-selective electrodeposition on semiconductor substrates. − Less research has been done on laser-induced localized electrodeposition of silver coatings on metallic substrates. Unlike the previous laser-induced electrodeposition preparation of gold coating by Guo et al, the localized silver coating experiment consisted of three processes: preplated silver, laser-induced electrodeposition silver, and deplated silver. The parameters of the preplated silver process affect the quality of the subsequent laser-induced electrodeposition silver coating.…”