Patent ID: 8710485

Claim:
A semiconductor device comprising: a semiconductor substrate; a fin type stacked layer structure which has first to n-th semiconductor layers (n is a natural number equal to or more than 2) that are stacked in a first direction perpendicular to a surface of the semiconductor substrate and which extends in a second direction parallel to the surface of the semiconductor substrate; and first to n-th layer select transistors to select one of the first to n-th semiconductor layers, wherein the i-th layer select transistor (i is one of 1 to n) among the first to n-th layer select transistors has a gate electrode which extends in the first direction on the surface of the fin type stacked layer structure that is located in a third direction perpendicular to the first and second directions, is normally on in the i-th semiconductor layer among the first to n-th semiconductor layers, and is controlled to be on or off in the remaining semiconductor layers other than the i-th semiconductor layer, and a channel region of the i-th semiconductor layer which is covered with the gate electrode of the i-th layer select transistor has a metal silicide.