Patent ID: 8501559

Claim:
A method of forming a semiconductor array, comprising: forming a semiconductor structure comprising a silicon material overlying an electrically insulative material, a conductive material overlying the silicon material, a doped material overlying the conductive material and a substrate overlying the doped material; removing portions of each of the substrate and the doped material to form a plurality of trenches; removing additional portions of the substrate and the doped material to form a plurality of pillars, each pillar of the plurality of pillars including a channel region and a source region oppositely doped with respect to the channel region; forming at least one access line on a surface of each of the plurality of pillars; and exposing the plurality of pillars to a dopant to form a drain region in each of the plurality of pillars, the drain region of each of the plurality of pillars spaced apart from the source region by the channel region and oppositely doped with respect to the channel region.