Patent ID: 7750410
Filing Date: 2010-07-06
Classification: H01L

Abstract:
1. An apparatus that adjusts carrier mobility in semiconductor devices comprising: a substrate, a first transistor having a gate dielectric, gate electrode, and source, drain, channel and gate regions, formed on or in said substrate, a second transistor having a gate dielectric, gate electrode, and source, drain, channel and gate regions, formed on said substrate, a first stressed alloy in said gate electrode of said first transistor and separated from said gate dielectric of said first transistor by a portion of said gate electrode of said first transistor to provide stress at least in said channel of said first transistor, a second stressed alloy in said gate electrode of said second transistor and separated from said gate dielectric of said second transistor by a portion of said gate electrode of said second transistor to provide stress opposite that of said first stressed alloy at least in said channel of said second transistor wherein said first and second stressed alloys can be composed of SiNi, CoSi a third alloy located in a region of the gate electrode within said region of said gate electrode of said first transistor separating said first alloy from said gate dielectric of said first transistor and proximate to said channel of said first transistor, and a fourth alloy located in a region of the gate electrode of said second transistor and within said region of said gate electrode of said second transistor separating said second alloy from said gate dielectric of said second transistor and proximate to said channel of said second transistor.