Contact for high-K metal gate device

2012 
A method of making an integrated circuit includes providing a substrate with a high-k dielectric and providing a polysilicon gate structure over the high-k dielectric. A doping process is performed on the substrate adjacent to the polysilicon gate structure, after which the polysilicon gate structure is removed and replaced with a metal gate structure. An interlayer dielectric (ILD) is deposited over the metal gate structure and the doped substrate, and a dry etch process forms a trench in the ILD to a top surface of the metal gate structure. After the dry etch process, a wet etch process forms an undercut near the top surface of the metal gate structure. The trench and undercut are then filled with a conductive material. The invention further provides a contact for a high-K metal gate device.
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    0
    References
    0
    Citations
    NaN
    KQI
    []