Patent ID: 7928506

Claim:
A semiconductor device, comprising: a vertical field effect transistor; a word line; and a bit line, wherein the vertical field effect transistor includes a first impurity-diffused region, a semiconductor region, and a second impurity-diffused region in this order, and includes a gate electrode formed so as to cover at least part of the side surface of the semiconductor region and a gate insulating film formed between the gate electrode and the semiconductor region, the word line includes (a) the gate electrode, and (b) a first metal interconnect having contact with the gate electrode and extending into a region upper than the first impurity-diffused region in a first direction, and the bit line includes (c) a connecting part formed so as to have contact with at least part of the side surface of the first impurity-diffused region, and (d) a second metal interconnect having contact with the connecting part and extending into a region lower than the semiconductor region in a second direction orthogonal to the first direction.