Patent ID: 7767565
Filing Date: 2010-08-03
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, the method comprising: forming a first vertical pillar over a semiconductor substrate; forming a spacer over a sidewall of the first vertical pillar; etching a portion of the semiconductor substrate exposed between the first vertical pillars to form a recess that exposes a second vertical pillar extending below from the first vertical pillar; forming a sacrificial film over the semiconductor substrate including the recess and a sidewall of the first vertical pillar to fill the recess, the second vertical pillar and the first vertical pillar; forming a supporting layer over the sacrificial film and the first vertical pillar; patterning the supporting layer to form a supporting pattern connecting the first vertical pillar with each other; removing the sacrificial film to expose the second vertical pillar; and forming a surrounding gate over a sidewall of the second vertical pillar.