Patent ID: 8741733
Filing Date: 2014-06-03
Classification: H01L

Abstract:
1. A method, comprising: raising a first channel comprising an N-type material above a substrate, the first channel having a first top surface, a first pair of sidewalls, and a first current flow direction along a first major axis of the first channel; raising a second channel comprising a P-type material above the substrate, the second channel having a second top surface, a second pair of sidewalls, and a second current flow direction along a second major axis of the second channel; depositing a first gate around the first top surface and the first pair of sidewalls of the first channel and substantially perpendicular to the major axis, wherein the first gate comprises a first intrinsically stressed metal fill in which intrinsic stress of the first intrinsically stressed metal fill exerts a tensile stress upon the first channel such that charge carrier mobility in the first channel is improved in the first current flow direction; and depositing a second gate around the second top surface and the second pair of sidewalls of the second channel and substantially perpendicular to the second major axis, wherein the second gate comprises a second intrinsically stressed metal fill in which intrinsic stress of the second intrinsically stressed metal fill exerts a compressive stress upon the second channel such that charge carrier mobility in the second channel is improved in the second current flow direction.