Patent ID: 8772872

Claim:
A transistor, comprising: a gate pattern on a semiconductor substrate; at least one spacer pattern on each sidewall of the gate pattern; a first semiconductor region under the gate pattern and having a first p-type impurity ion concentration; a plurality of second semiconductor regions each under one of the at least one spacer pattern, each of the plurality of second semiconductor regions having a second p-type impurity ion concentration being lower than the first p-type impurity ion concentration; a plurality of third semiconductor regions each adjacent to one of the plurality of second semiconductor regions, each of the plurality of third semiconductor regions having a first n-type impurity ion concentration; and a fourth semiconductor region under one of the at least one spacer pattern, the fourth semiconductor region having the same impurity ion concentration as each of the plurality of second semiconductor regions, wherein the first, second, third, and fourth semiconductor regions are in the semiconductor substrate and electrically connected to one another; a fifth semiconductor region adjacent to another of the at least one spacer pattern, wherein the fourth and fifth semiconductor regions are in the semiconductor layer and electrically connected to the first, second and third semiconductor regions; a gate insulating layer between the gate pattern and the semiconductor substrate; a dielectric layer on the gate insulating layer to cover the gate pattern and the at least one spacer pattern, wherein the dielectric layer includes an insulating material having silicon nitride that applies tensile stress to the semiconductor layer; and a plurality of electrode terminals on both sides of the gate pattern and contacting the insulating layer through the dielectric layer, the gate insulating layer and the semiconductor layer, wherein the plurality of electrode terminals are each in contact with one selected from the group consisting of the third and fifth semiconductor regions.