Patent ID: 8658506

Claim:
A method for selectively improving integrated circuit performance, comprising: defining a critical portion of an integrated circuit layout that determines the speed of the integrated circuit; identifying at least a part of the critical portion that includes a halo implant region; and performing a speed push flow process to increase performance of the part of the critical portion that includes the halo implant region, wherein the speed push flow process further comprises: masking a first portion of the integrated circuit that includes the halo implant region and is outside the critical portion; implanting a first halo implant in a portion of the integrated circuit that includes the halo implant region and is inside the critical portion; masking a second portion of the integrated circuit that includes the halo implant region and is inside the critical portion; and implanting a second halo implant in a portion of the integrated circuit that includes the halo implant region and is outside the critical portion, wherein the second halo implant receives a higher dose of dopant than the first halo implant.