Patent ID: 8350323

Claim:
A semiconductor device comprising: a semiconductor substrate having a first surface and a first groove extending downward from the first surface, the first groove extending in a first horizontal direction, and the first groove having at least first and second side surfaces facing each other; a first semiconductor portion extending upward from the first surface of the semiconductor substrate, the first semiconductor portion being adjacent to the first side surface of the first groove in plan view; a second semiconductor portion extending upward from the first surface of the semiconductor substrate, the second semiconductor portion being adjacent to the second side surface of the first groove in plan view, and the first and second semiconductor portions being arranged in a second horizontal direction different from the first horizontal direction; a bit line in the first groove, the bit line being insulated from the semiconductor substrate; and a contact portion in the first groove, the contact portion being electrically connected to the bit line, the contact portion contacting the first side surface of the first groove, and the contact portion being insulated from the second side surface of the first groove.