Patent ID: 8383478
Filing Date: 2013-02-26
Classification: G11C,H01L

Abstract:
1. A method to form a nonvolatile memory cell, the method comprising: i) forming a first conductor at a first height above a substrate; ii) forming a first pillar-shaped semiconductor element above the first conductor, wherein the first pillar-shaped semiconductor element comprises a first heavily doped layer of a first conductivity type, a second lightly doped layer above and in contact with the first heavily doped layer, and a third heavily doped layer of a second conductivity type above and in contact with the second lightly doped layer, the second conductivity type opposite the first conductivity type; iii) forming a first antifuse above the third heavily doped layer of the first pillar-shaped semiconductor element; and iv) forming a second conductor above the first antifuse.