LASER BEAM INTENSITY DISTRIBUTION FLATTENING MASK, AND DEVICE AND METHOD FOR LASER PLATING USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a laser plating method which makes the light intensity distribution of a laser beam constant and improves the flatness of a plating deposit surface. SOLUTION: The output beam from a laser oscillator 1 is passed through a condenser lens 4 and a mask 3 having a prescribed amplitude transmittivity and a prescribed phase shift to make the light intensity distribution on a light convergence surface 5 constant in a specific figure. ON the light convergence surface 5, a plated surface which is brought into contact with electroless planting liquid liquid is arranged to improve the flatness of the planting deposit surface. Laser plating wherein the output beam from the laser oscillator 1 is expanded through a beam expander and guided in the mentioned device is adaptive to cases wherein a large-output laser is needed.