Patent ID: 7598161

Claim:
A halo implant method for semiconductor devices, the method comprising: forming a first device structure on a semiconductor substrate, the first device structure comprising a first diffusion region that represents source and drain regions and a gate channel of the first device structure, and the first device structure comprising a first gate structure over the first diffusion region, the first gate structure being oriented in a first direction relative to a reference direction; forming a second device structure on the semiconductor substrate, the second device structure comprising a second diffusion region that represents source and drain regions and a gate channel of the second device structure, and the second device structure comprising a second gate structure over the second diffusion region, the second gate structure being oriented in a second direction relative to the reference direction; forming an implant mask that selectively masks portions of the first device structure while leaving the first diffusion region substantially exposed, and that selectively masks portions of the second device structure while leaving the second diffusion region substantially exposed; halo implanting the first diffusion region using a first ion bombardment oriented in a first tilted direction, the implant mask shadowing the second diffusion region from the first ion bombardment; and halo implanting the second diffusion region using a second ion bombardment oriented in a second tilted direction, the implant mask shadowing the first diffusion region from the second ion bombardment.