Patent ID: 7253043
Filing Date: 2007-08-07
Classification: H01L

Abstract:
1. A method of forming a multi gate transistor device, comprising: performing a first implantation process to achieve a first doping concentration within a semiconductor substrate; performing a second implantation process to achieve a second doping concentration within an area of the semiconductor substrate wherein a channel region of the transistor is to be established, the second implantation process merely doping a portion of the area; forming a multi gate dielectric over the area of the semiconductor substrate wherein the channel region of the transistor is established; forming a multi gate electrode over the gate dielectric; performing a third implantation process to establish a first extension region adjacent to a first side of the channel region and a second extension region adjacent to a second side of the channel region, the first and second extension regions having a third doping concentration; and performing a fourth implantation process to establish a source region adjacent to the first extension region and a drain region adjacent to the second extension region, the source and drain regions having a fourth doping concentration, wherein the fourth doping concentration is greater than the third doping concentration, the third doping concentration is greater than the second doping concentration and the second doping concentration is greater than the first doping concentration.