Patent ID: 8227861
Filing Date: 2012-07-24
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate having a first dopant type; a first gate electrode formed over the substrate; a second gate electrode formed over the substrate and spatially separated from the first gate electrode, wherein the first gate electrode has a first length and the second gate electrode has a second length, the second length being substantially different from the first length; a first region of a second dopant type formed in the substrate between and partially underlying the first and second gate electrodes, the first region having a first dopant concentration; a separation region of the second dopant type formed in the first region, the separation region being spaced apart from the first and second gate electrodes and having a second dopant concentration that is greater than the first dopant concentration; a source region formed in the semiconductor substrate on an opposing side of the first gate electrode from the first region, the source region having the second dopant type; and a drain region formed in the semiconductor substrate on an opposing side of the second gate electrode from the first region, the drain region having the second dopant type.