Patent ID: 7943519
Filing Date: 2011-05-17
Classification: C09K,C23F,G02F,H01L

Abstract:
1. A method for fabricating an interconnection line, the method comprising: forming multiple layers including a buffer layer consisting of molybdenum (Mo), a copper (Cu) layer, and a corrosion prevention layer consisting of molybdenum nitride (MoN) on a substrate, wherein the Cu layer is interposed between the buffer layer and the corrosion prevention layer; and etching the multiple layers using an etchant consisting of 10-20 wt % hydrogen peroxide, 1-5 wt % organic acid, a 0.1-1 wt % triazole-based compound, a 0.01-0.5 wt % fluoride compound, and deionized water as the remainder.