The invention discloses a method for preparing electronic conductive micro-spheres for producing an
anisotropic conductive film by simply absorbing
metal palladium ions. The method comprises the following steps of step I, preparing
polymer seed balls; step II, preparing
seed ball dispersion liquid; step III, preparing
emulsion; step IV, adding the
emulsion into the
seed ball dispersion liquid for swelling to obtain a swelling solution; step V, performing
polymerization, centrifuging, cleaning and
vacuum drying on the swelling solution, water and surfactant to obtain monodisperse cross-linked
polymer micro-spheres; step VI, dispersing the cross-linked
polymer micro-spheres in strong
oxidizing acid containing
palladium chloride, wherein the concentration of the strong
oxidizing acid is 0.1-3g / L; performing ultrasonic mixing, centrifuging and washing until the PH value is neutral, and adding a
reducing agent for reducing to obtain polymer micro-spheres with high-catalytic-activity
palladium; step VII, adding the polymer micro-spheres into
electroless plating solution for plating. Compared with the traditional
adsorption method for
colloid palladium, the method disclosed by the invention has the advantages of fewer steps, high adsorption capacity, good effect and uneasiness for analyzing; the intrusion of
tin ions is reduced, and the risk that activating and sensitizing liquid is easy to deteriorate is eliminated.