Patent ID: 7541279
Filing Date: 2009-06-02
Classification: C25D,H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: forming an interlayer insulating layer on a semiconductor substrate; selectively patterning the interlayer insulating layer to form a contact hole; depositing aluminum (Al) on an inner surface of the contact hole; submerging the semiconductor substrate on which the aluminum is deposited into an electro-chemical plating (ECP) solution bath in which copper (Cu) is dissolved; dissolving the aluminum in the ECP solution bath; plating the aluminum and copper dissolved in the ECP solution bath at the same time to gap-fill a copper-aluminum alloy in the contact hole; and removing a portion of the copper-aluminum alloy using the interlayer insulating layer as an end point to form a copper-aluminum alloy interconnection.