Patent ID: 7494906

Claim:
A method, comprising: providing a first semiconductor region above a substrate; forming a first dislocation region in a first region of at least one of said substrate and said first semiconductor region, said first dislocation region enabling a relative motion on an atomic scale between said substrate and at least a first portion of said first semiconductor region, said first dislocation region being formed by implantation of a first light ion species at a first concentration level and heat treatment; forming a first stress-inducing region mechanically coupled to said first portion of said semiconductor region, said first stress-inducing region creating a first strain in said at least a first portion of the semiconductor region; providing a second semiconductor region above said substrate that does not overlap said first semiconductor region; forming a second dislocation region in a second region of at least one of said substrate and said second semiconductor region, said second dislocation region enabling a relative motion on an atomic scale between said substrate and at least a second portion of said second semiconductor region, said second dislocation region being formed by implantation of the first light inert species at a second concentration level different than the first concentration level and heat treatment, wherein said implantation for said second dislocation region differs from said implantation for said first dislocation region to provide different levels of relative motion in said first and second dislocation regions; and forming a second stress-inducing region mechanically coupled to said second portion of said second semiconductor region, said second stress-inducing region creating a second strain in said at least a portion of the second semiconductor region, said second strain differing from said first strain.