Patent ID: 9673278
Date: 2017-06-06
CPC Classifications: H01L

Claim:
1. A method of manufacturing a source-drain structure, the method comprising: forming a plurality of gate electrodes on a substrate; forming a drain region and a source region; forming a lightly-doped ultra-shallow junction comprising a plurality of one-conductivity type impurity ions in the drain region; forming spacers on opposite sides of the gate electrodes; performing a first opposite-conductivity type deep ion implantation comprising a plurality of impurity ions onto the lightly-doped ultra-shallow junction to form a drain-substrate junction in the vicinity of a junction between a side portion and a bottom portion of the lightly-doped ultra-shallow junction and the substrate, the drain-substrate junction comprising the plurality of impurity ions opposite the plurality of one-conductivity type impurity ions of the lightly-doped ultra-shallow junction; and performing a heavily-doped ion implantation onto the lightly-doped ultra-shallow junction to form a heavily-doped drain region.