Patent ID: 9379117
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. A method for fabricating a semiconductor device, the method comprising: etching a semiconductor substrate to form bulb-type trenches that define a plurality of active regions in the semiconductor substrate; forming a supporter in each of the bulb-type trenches; dividing each active region, of the plurality of active regions, into a pair of body lines by forming a trench through each active region; and forming a bit line in each body line of the pair of body lines, wherein the dividing of each active region into a pair of body lines comprises: partially etching a thickness of each active region to form the trenches; forming spacers on sidewalls of the trenches; etching surfaces of the plurality of active regions that define bottom surfaces of the trenches to increase a depth of the trenches; and etching sidewalls, which define the trenches, of the pair of body lines to form recessed lower sidewalls extending in a direction perpendicular to a longitudinal direction of the trenches.