Patent ID: 8372745
Filing Date: 2013-02-12
Classification: C23C,H01L

Abstract:
1. A manufacturing method for a semiconductor device, the method comprising the steps of: forming a groove on an insulating film including silicon (Si); forming a copper alloy film on an inner surface of the groove, the copper alloy film including manganese (Mn) and copper (Cu): burying copper (Cu) in the groove so as to form a buried copper film; and applying a heat treatment so as to form a barrier layer between the copper alloy film and the insulating film, and so as to form an interconnection by unifying the copper alloy film with the copper (Cu) in the buried copper film; wherein the barrier layer includes manganese (Mn)-based oxide having atomic concentration of manganese (Mn) maximized in a central part of a thickness of the barrier layer.