The effect of 2-mercaptobenzothiazole on laser-assisted electroless copper plating

Abstract

Copper coatings on PET substrates (conductive treatment through laser direct structuring) were prepared from an electroless plating bath. The coatings' morphology and the plating rate were shown in the figure at various concentrations of 2-MBT.

Effect of Ni on Electroless Cu Plating Rates in the Presence of 2,2′-Bipyridyl and 2-Mercaptobenzothiazole

“…Thus, the more positive potential found with MBT may reflect the initial condition before formaldehyde addition and the more positive mixed potential in the case of MBT. 7,42 Baths containing MBT and Ni exhibit potentials slightly lower than that of MBT alone. The final potentials obtained in this measurement were utilized in subsequent chronoamperometric experiments.…”

“…−0.65 to −0.8 V. 11,61,62 Thiols have a very high affinity for Cu so the changes in the work function of Cu with the inclusion of Ni has a negligible effect on MBT adsorption. 42 The presence of MBT on the Cu electrode has a dramatic effect on the Cu deposition rate. The origin of the effect is likely site blockage by the MBT additive.…”

“…MBT strongly adsorbs to copper blocking active sites which inhibits Cu reduction. 42,63 SERS data shows the MBT adsorbs to the surface during the potentials reached in electroless deposition likely causing the decrease in Cu deposition rate.…”

3D-MID Technology for Surface Modification of Polymer-Based Composites: A Comprehensive Review

“…When palladium chloride solution is dipping in, the palladium chloride may be reduced to metallic palladium (Pd 0 ) and bound to the desired surface. Moreover, the concentration of palladium and stannous is normally 5 × 10 −6 g/cm 2 and 20 × 10 −6 g/cm 2 respectively, which usually is used for plating of plastics [ 286 , 287 , 288 , 289 ].…”