Patent ID: 7554159
Filing Date: 2009-06-30
Classification: H01L

Abstract:
1. A method, comprising: providing a semiconductor substrate of a first dopant type; forming a well region of the first dopant type in the substrate; forming a lightly doped region of the first dopant type in the well region; forming at least one source/drain pair of a second dopant type in the substrate, wherein a source region of the source/drain pair is separated from a drain region of the source/drain pair by a channel region; forming a gate on the substrate and over both the channel region and the lightly doped region so that the lightly doped region is directly below a central portion of the gate; forming lightly doped drain (LDD) regions of the second dopant type adjacent to the gate; forming a first diffused region of the second dopant type under the drain region of the source/drain pair; and forming a second diffused region of the second dopant type under the source region of the source/drain pair.