Patent ID: 8017483
Filing Date: 2011-09-13
Classification: H01L

Abstract:
1. A method comprising: forming at least a first and a second gate-mask stack on top of a semiconductor substrate, wherein said first and second gate-mask stacks include at least, respectively, a first and a second gate conductor of a first and a second transistor and have, respectively, a top surface, a first side, and a second side with said second side being opposite to said first side; performing a first halo implantation from said first side of said first and second gate-mask stacks at a first angle while applying said first gate-mask stack in preventing said first halo implantation from reaching a first source/drain region of said second transistor, wherein said first angle is equal to or larger than a predetermined value; and performing a second halo implantation from said second side of said first and second gate-mask stacks at a second angle, thereby creating halo implant in a second source/drain region of said second transistor, wherein said first and second angles are measured against a normal to said substrate.