Invention Grant
US09130029B2 Recessing and capping of gate structures with varying metal compositions 有权
具有不同金属成分的门结构的凹陷和封盖

Recessing and capping of gate structures with varying metal compositions
Abstract:
A approach for recessing and capping metal gate structures is disclosed. Embodiments include: forming a dummy gate electrode on a substrate; forming a hard mask over the dummy gate electrode; forming spacers on opposite sides of the dummy gate electrode and the hard mask; forming an interlayer dielectric (ILD) over the substrate adjacent the spacers; forming a first trench in the ILD down to the dummy gate electrode; removing the dummy gate electrode to form a second trench below the first trench; forming a metal gate structure in the first and second trenches; and forming a gate cap over the metal gate structure.
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