Patent ID: 6858907

Claim:
A semiconductor device comprising: a silicon substrate; a source/drain region formed in the substrate including a lightly doped region and an adjacent heavily doped region, the depth of the heavily doped region being greater than the depth of the lightly doped region; a gate oxide layer on the silicon substrate; and a notched gate electrode on the substrate, the notched gate electrode including a notch along an outer side surface of a lower portion such that a top portion of the notched gate electrode is wider than the lower portion, the gate oxide layer extending between the interface of the notched gate electrode and the substrate, and a gate poly oxide layer provided along an outer side surface of the notched gate electrode and along an inner wall of the notch, a portion of the lightly doped region being under the notch, wherein a width of the lower portion of the gate electrode is in the range of about 5 to 50% of a width of the top portion of the gate electrode.