Patent ID: 8080147
Filing Date: 2011-12-20
Classification: C25D

Abstract:
1. An electrolytic plating method comprising: a first layer forming step of immersing an in-process substrate in an electrolytic plating liquid including copper salt to form a first copper layer on the in-process substrate; and a second layer forming step of forming a second copper layer over the first copper layer in the electrolytic plating liquid; wherein the first layer forming step is continued for ten seconds or less after the immersion of the in-process substrate, in the first layer forming step, the in-process substrate is rotated at a first rotational speed N in rpm which satisfies a condition of D×N×π≦6000×π (mm/min), where D is a diameter of the in-process substrate in mm, and D×N×π represents a peripheral speed of the in-process substrate, and a plating current is supplied to the in-process substrate at a first current density of 10 mA/cm in the second layer forming step, the in-process substrate is rotated at a second rotational speed which is higher than the first rotational speed, and the plating current is supplied to the in-process substrate at a second current density which is higher than the first current density.