Patent ID: 9059023
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a drain region in the semiconductor substrate; a well in the semiconductor substrate, a body region in the semiconductor substrate, spaced from the drain region, and adjacent the well; a source region in the body region; and a gate pattern on the semiconductor substrate and including dopants of a first conductivity type, wherein the gate pattern includes a first gate adjacent the source region and a second gate adjacent the drain region, the first gate to control formation of a first channel and the second gate to control formation of a second channel, the first channel to be connected to the second channel between the source and drain regions, wherein a concentration of the dopants of the first conductivity type in the first gate is higher than a concentration of the dopants of the first conductivity type in the second gate, and wherein a threshold voltage of the first channel is greater than a threshold voltage of the second channel based on a difference in concentration of dopants of a same conductivity type in the well and body region.