Patent ID: 9231205
Filing Date: 2016-01-05
CPC Classification: H01L

Claim Text:
1. A resistive random access memory (RRAM) cell, comprising: a bottom electrode having a via portion and a non-planar portion, wherein said via portion of the bottom electrode is embedded in a first RRAM stop layer and the non-planar portion has an apex and is centered above the via portion, wherein a cross section of the non-planar portion of the bottom electrode is a half-ellipse, a parabola, or a catenary, wherein the bottom electrode also has a planar portion between the non-planar portion and the via portion, the planar portion extending along a top surface of the first RRAM stop layer; a resistive material layer conformally covering the non-planar portion of the bottom electrode; and, a top electrode over the resistive material layer.