Patent ID: 8946801
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A zero capacitance random access memory cell (ZRAM), comprising a fin body having a doped portion on a single side of the fin body to increase storage capacitance and to form an asymmetric charge distribution, further comprising a gate structure covering first and second sides of the fin body, wherein a first side of the gate structure has an effective work function near a conduction band of the fin body and a second side of the gate structure has an effective work function near a valence band of the fin body, which serves to accumulate holes in the portions of the fin body which are adjacent to the portion of the gate structure having the work function near the valence band, wherein the fin body comprises an active silicon layer, and further comprising: a dielectric layer deposited on the fin body and an exposed buried oxide layer; a metal layer deposited on the dielectric material; a second metal layer deposited on the metal layer, the second metal layer having the work function nearby the valence band of the fin body.