Invention Grant
US08853753B2 Contact for high-k metal gate device 有权
接触高k金属门装置

Contact for high-k metal gate device
Abstract:
An integrated circuit includes a semiconductor substrate including a source region and a drain region and a gate dielectric over the semiconductor substrate. A metal gate structure is over the semiconductor substrate and the gate dielectric and between the source and drain regions. The integrated circuit further includes an interlayer dielectric (ILD) over the semiconductor substrate. First and second contacts extend through the ILD and adjacent the source and drain regions, respectively, and a third contact extends through the ILD and adjacent a top surface of the metal gate structure. The third contact further extends into an undercut region of the metal gate structure.
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