Abstract:
A method for fabricating a semiconductor device is provided. A ruthenium layer is formed on a semiconductor substrate in a processing chamber. A barrier layer is formed on the ruthenium layer supplying a halide-free precursor in the processing chamber. A metal layer such as an aluminum layer, an aluminum alloy layer, a tungsten layer, or a copper layer is formed on the barrier layer. The barrier layer is one of a TiN layer, a TaN layer, a WN layer, and an MoN layer. The TiN layer is one of formed by using an MOCVD process and an ALD process, and the halide-free precursor is a titanium compound selected from the group consisting of pentakis(diethylamino) titanium, tetrakis(diethylamino) titanium, tetrakis(dimethylamino) titanium, and pentakis(dimethylamino) titanium. The TaN layer is formed by using one of an MOCVD process and an ALD process, and the halide-free precursor is a tantalum compound selected from the group consisting of t-butyltrikis(diethylamino) tantalum, pentakis(diethylamino) tantalum, tetrakis(dimethylamino) tantalum, and pentakis(dimethylamino) tantalum.
Abstract:
A semiconductor device having a contact using a crack-protecting layer and a method of forming the same are provided. The crack-protecting layer formed of a dielectric material is formed on an interlayer dielectric layer. The crack-protecting layer relieves or absorbs residual stress generated on a conductive layer used in forming a contact plug. Thus, a contact can be formed without damage to the interlayer dielectric layer due to residual stress.